1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Procedures for interfacing to Open Firmware.
5 * Paul Mackerras August 1996.
6 * Copyright (C) 1996-2005 Paul Mackerras.
8 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
9 * {engebret|bergner}@us.ibm.com
14 /* we cannot use FORTIFY as it brings in new symbols */
18 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/init.h>
21 #include <linux/threads.h>
22 #include <linux/spinlock.h>
23 #include <linux/types.h>
24 #include <linux/pci.h>
25 #include <linux/proc_fs.h>
26 #include <linux/delay.h>
27 #include <linux/initrd.h>
28 #include <linux/bitops.h>
32 #include <asm/processor.h>
37 #include <asm/pgtable.h>
38 #include <asm/iommu.h>
39 #include <asm/btext.h>
40 #include <asm/sections.h>
41 #include <asm/machdep.h>
42 #include <asm/asm-prototypes.h>
44 #include <linux/linux_logo.h>
46 /* All of prom_init bss lives here */
47 #define __prombss __section(.bss.prominit)
50 * Eventually bump that one up
52 #define DEVTREE_CHUNK_SIZE 0x100000
55 * This is the size of the local memory reserve map that gets copied
56 * into the boot params passed to the kernel. That size is totally
57 * flexible as the kernel just reads the list until it encounters an
58 * entry with size 0, so it can be changed without breaking binary
61 #define MEM_RESERVE_MAP_SIZE 8
64 * prom_init() is called very early on, before the kernel text
65 * and data have been mapped to KERNELBASE. At this point the code
66 * is running at whatever address it has been loaded at.
67 * On ppc32 we compile with -mrelocatable, which means that references
68 * to extern and static variables get relocated automatically.
69 * ppc64 objects are always relocatable, we just need to relocate the
72 * Because OF may have mapped I/O devices into the area starting at
73 * KERNELBASE, particularly on CHRP machines, we can't safely call
74 * OF once the kernel has been mapped to KERNELBASE. Therefore all
75 * OF calls must be done within prom_init().
77 * ADDR is used in calls to call_prom. The 4th and following
78 * arguments to call_prom should be 32-bit values.
79 * On ppc64, 64 bit values are truncated to 32 bits (and
80 * fortunately don't get interpreted as two arguments).
82 #define ADDR(x) (u32)(unsigned long)(x)
85 #define OF_WORKAROUNDS 0
87 #define OF_WORKAROUNDS of_workarounds
88 static int of_workarounds __prombss
;
91 #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
92 #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
94 #define PROM_BUG() do { \
95 prom_printf("kernel BUG at %s line 0x%x!\n", \
96 __FILE__, __LINE__); \
97 __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
101 #define prom_debug(x...) prom_printf(x)
103 #define prom_debug(x...) do { } while (0)
107 typedef u32 prom_arg_t
;
125 struct mem_map_entry
{
130 typedef __be32 cell_t
;
132 extern void __start(unsigned long r3
, unsigned long r4
, unsigned long r5
,
133 unsigned long r6
, unsigned long r7
, unsigned long r8
,
137 extern int enter_prom(struct prom_args
*args
, unsigned long entry
);
139 static inline int enter_prom(struct prom_args
*args
, unsigned long entry
)
141 return ((int (*)(struct prom_args
*))entry
)(args
);
145 extern void copy_and_flush(unsigned long dest
, unsigned long src
,
146 unsigned long size
, unsigned long offset
);
149 static struct prom_t __prombss prom
;
151 static unsigned long __prombss prom_entry
;
153 static char __prombss of_stdout_device
[256];
154 static char __prombss prom_scratch
[256];
156 static unsigned long __prombss dt_header_start
;
157 static unsigned long __prombss dt_struct_start
, dt_struct_end
;
158 static unsigned long __prombss dt_string_start
, dt_string_end
;
160 static unsigned long __prombss prom_initrd_start
, prom_initrd_end
;
163 static int __prombss prom_iommu_force_on
;
164 static int __prombss prom_iommu_off
;
165 static unsigned long __prombss prom_tce_alloc_start
;
166 static unsigned long __prombss prom_tce_alloc_end
;
169 #ifdef CONFIG_PPC_PSERIES
170 static bool __prombss prom_radix_disable
;
173 struct platform_support
{
180 /* Platforms codes are now obsolete in the kernel. Now only used within this
181 * file and ultimately gone too. Feel free to change them if you need, they
182 * are not shared with anything outside of this file anymore
184 #define PLATFORM_PSERIES 0x0100
185 #define PLATFORM_PSERIES_LPAR 0x0101
186 #define PLATFORM_LPAR 0x0001
187 #define PLATFORM_POWERMAC 0x0400
188 #define PLATFORM_GENERIC 0x0500
190 static int __prombss of_platform
;
192 static char __prombss prom_cmd_line
[COMMAND_LINE_SIZE
];
194 static unsigned long __prombss prom_memory_limit
;
196 static unsigned long __prombss alloc_top
;
197 static unsigned long __prombss alloc_top_high
;
198 static unsigned long __prombss alloc_bottom
;
199 static unsigned long __prombss rmo_top
;
200 static unsigned long __prombss ram_top
;
202 static struct mem_map_entry __prombss mem_reserve_map
[MEM_RESERVE_MAP_SIZE
];
203 static int __prombss mem_reserve_cnt
;
205 static cell_t __prombss regbuf
[1024];
207 static bool __prombss rtas_has_query_cpu_stopped
;
211 * Error results ... some OF calls will return "-1" on error, some
212 * will return 0, some will return either. To simplify, here are
213 * macros to use with any ihandle or phandle return value to check if
217 #define PROM_ERROR (-1u)
218 #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
219 #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
221 /* Copied from lib/string.c and lib/kstrtox.c */
223 static int __init
prom_strcmp(const char *cs
, const char *ct
)
225 unsigned char c1
, c2
;
231 return c1
< c2
? -1 : 1;
238 static char __init
*prom_strcpy(char *dest
, const char *src
)
242 while ((*dest
++ = *src
++) != '\0')
247 static int __init
prom_strncmp(const char *cs
, const char *ct
, size_t count
)
249 unsigned char c1
, c2
;
255 return c1
< c2
? -1 : 1;
263 static size_t __init
prom_strlen(const char *s
)
267 for (sc
= s
; *sc
!= '\0'; ++sc
)
272 static int __init
prom_memcmp(const void *cs
, const void *ct
, size_t count
)
274 const unsigned char *su1
, *su2
;
277 for (su1
= cs
, su2
= ct
; 0 < count
; ++su1
, ++su2
, count
--)
278 if ((res
= *su1
- *su2
) != 0)
283 static char __init
*prom_strstr(const char *s1
, const char *s2
)
287 l2
= prom_strlen(s2
);
290 l1
= prom_strlen(s1
);
293 if (!prom_memcmp(s1
, s2
, l2
))
300 static size_t __init
prom_strlcpy(char *dest
, const char *src
, size_t size
)
302 size_t ret
= prom_strlen(src
);
305 size_t len
= (ret
>= size
) ? size
- 1 : ret
;
306 memcpy(dest
, src
, len
);
312 #ifdef CONFIG_PPC_PSERIES
313 static int __init
prom_strtobool(const char *s
, bool *res
)
351 /* This is the one and *ONLY* place where we actually call open
355 static int __init
call_prom(const char *service
, int nargs
, int nret
, ...)
358 struct prom_args args
;
361 args
.service
= cpu_to_be32(ADDR(service
));
362 args
.nargs
= cpu_to_be32(nargs
);
363 args
.nret
= cpu_to_be32(nret
);
365 va_start(list
, nret
);
366 for (i
= 0; i
< nargs
; i
++)
367 args
.args
[i
] = cpu_to_be32(va_arg(list
, prom_arg_t
));
370 for (i
= 0; i
< nret
; i
++)
371 args
.args
[nargs
+i
] = 0;
373 if (enter_prom(&args
, prom_entry
) < 0)
376 return (nret
> 0) ? be32_to_cpu(args
.args
[nargs
]) : 0;
379 static int __init
call_prom_ret(const char *service
, int nargs
, int nret
,
380 prom_arg_t
*rets
, ...)
383 struct prom_args args
;
386 args
.service
= cpu_to_be32(ADDR(service
));
387 args
.nargs
= cpu_to_be32(nargs
);
388 args
.nret
= cpu_to_be32(nret
);
390 va_start(list
, rets
);
391 for (i
= 0; i
< nargs
; i
++)
392 args
.args
[i
] = cpu_to_be32(va_arg(list
, prom_arg_t
));
395 for (i
= 0; i
< nret
; i
++)
396 args
.args
[nargs
+i
] = 0;
398 if (enter_prom(&args
, prom_entry
) < 0)
402 for (i
= 1; i
< nret
; ++i
)
403 rets
[i
-1] = be32_to_cpu(args
.args
[nargs
+i
]);
405 return (nret
> 0) ? be32_to_cpu(args
.args
[nargs
]) : 0;
409 static void __init
prom_print(const char *msg
)
413 if (prom
.stdout
== 0)
416 for (p
= msg
; *p
!= 0; p
= q
) {
417 for (q
= p
; *q
!= 0 && *q
!= '\n'; ++q
)
420 call_prom("write", 3, 1, prom
.stdout
, p
, q
- p
);
424 call_prom("write", 3, 1, prom
.stdout
, ADDR("\r\n"), 2);
430 * Both prom_print_hex & prom_print_dec takes an unsigned long as input so that
431 * we do not need __udivdi3 or __umoddi3 on 32bits.
433 static void __init
prom_print_hex(unsigned long val
)
435 int i
, nibbles
= sizeof(val
)*2;
436 char buf
[sizeof(val
)*2+1];
438 for (i
= nibbles
-1; i
>= 0; i
--) {
439 buf
[i
] = (val
& 0xf) + '0';
441 buf
[i
] += ('a'-'0'-10);
445 call_prom("write", 3, 1, prom
.stdout
, buf
, nibbles
);
448 /* max number of decimal digits in an unsigned long */
450 static void __init
prom_print_dec(unsigned long val
)
453 char buf
[UL_DIGITS
+1];
455 for (i
= UL_DIGITS
-1; i
>= 0; i
--) {
456 buf
[i
] = (val
% 10) + '0';
461 /* shift stuff down */
462 size
= UL_DIGITS
- i
;
463 call_prom("write", 3, 1, prom
.stdout
, buf
+i
, size
);
467 static void __init
prom_printf(const char *format
, ...)
469 const char *p
, *q
, *s
;
475 va_start(args
, format
);
476 for (p
= format
; *p
!= 0; p
= q
) {
477 for (q
= p
; *q
!= 0 && *q
!= '\n' && *q
!= '%'; ++q
)
480 call_prom("write", 3, 1, prom
.stdout
, p
, q
- p
);
485 call_prom("write", 3, 1, prom
.stdout
,
499 s
= va_arg(args
, const char *);
506 v
= va_arg(args
, unsigned int);
509 v
= va_arg(args
, unsigned long);
513 v
= va_arg(args
, unsigned long long);
522 v
= va_arg(args
, unsigned int);
525 v
= va_arg(args
, unsigned long);
529 v
= va_arg(args
, unsigned long long);
538 vs
= va_arg(args
, int);
541 vs
= va_arg(args
, long);
545 vs
= va_arg(args
, long long);
560 static unsigned int __init
prom_claim(unsigned long virt
, unsigned long size
,
564 if (align
== 0 && (OF_WORKAROUNDS
& OF_WA_CLAIM
)) {
566 * Old OF requires we claim physical and virtual separately
567 * and then map explicitly (assuming virtual mode)
572 ret
= call_prom_ret("call-method", 5, 2, &result
,
573 ADDR("claim"), prom
.memory
,
575 if (ret
!= 0 || result
== -1)
577 ret
= call_prom_ret("call-method", 5, 2, &result
,
578 ADDR("claim"), prom
.mmumap
,
581 call_prom("call-method", 4, 1, ADDR("release"),
582 prom
.memory
, size
, virt
);
585 /* the 0x12 is M (coherence) + PP == read/write */
586 call_prom("call-method", 6, 1,
587 ADDR("map"), prom
.mmumap
, 0x12, size
, virt
, virt
);
590 return call_prom("claim", 3, 1, (prom_arg_t
)virt
, (prom_arg_t
)size
,
594 static void __init
__attribute__((noreturn
)) prom_panic(const char *reason
)
597 /* Do not call exit because it clears the screen on pmac
598 * it also causes some sort of double-fault on early pmacs */
599 if (of_platform
== PLATFORM_POWERMAC
)
602 /* ToDo: should put up an SRC here on pSeries */
603 call_prom("exit", 0, 0);
605 for (;;) /* should never get here */
610 static int __init
prom_next_node(phandle
*nodep
)
614 if ((node
= *nodep
) != 0
615 && (*nodep
= call_prom("child", 1, 1, node
)) != 0)
617 if ((*nodep
= call_prom("peer", 1, 1, node
)) != 0)
620 if ((node
= call_prom("parent", 1, 1, node
)) == 0)
622 if ((*nodep
= call_prom("peer", 1, 1, node
)) != 0)
627 static inline int __init
prom_getprop(phandle node
, const char *pname
,
628 void *value
, size_t valuelen
)
630 return call_prom("getprop", 4, 1, node
, ADDR(pname
),
631 (u32
)(unsigned long) value
, (u32
) valuelen
);
634 static inline int __init
prom_getproplen(phandle node
, const char *pname
)
636 return call_prom("getproplen", 2, 1, node
, ADDR(pname
));
639 static void add_string(char **str
, const char *q
)
649 static char *tohex(unsigned int x
)
651 static const char digits
[] __initconst
= "0123456789abcdef";
652 static char result
[9] __prombss
;
659 result
[i
] = digits
[x
& 0xf];
661 } while (x
!= 0 && i
> 0);
665 static int __init
prom_setprop(phandle node
, const char *nodename
,
666 const char *pname
, void *value
, size_t valuelen
)
670 if (!(OF_WORKAROUNDS
& OF_WA_LONGTRAIL
))
671 return call_prom("setprop", 4, 1, node
, ADDR(pname
),
672 (u32
)(unsigned long) value
, (u32
) valuelen
);
674 /* gah... setprop doesn't work on longtrail, have to use interpret */
676 add_string(&p
, "dev");
677 add_string(&p
, nodename
);
678 add_string(&p
, tohex((u32
)(unsigned long) value
));
679 add_string(&p
, tohex(valuelen
));
680 add_string(&p
, tohex(ADDR(pname
)));
681 add_string(&p
, tohex(prom_strlen(pname
)));
682 add_string(&p
, "property");
684 return call_prom("interpret", 1, 1, (u32
)(unsigned long) cmd
);
687 /* We can't use the standard versions because of relocation headaches. */
688 #define isxdigit(c) (('0' <= (c) && (c) <= '9') \
689 || ('a' <= (c) && (c) <= 'f') \
690 || ('A' <= (c) && (c) <= 'F'))
692 #define isdigit(c) ('0' <= (c) && (c) <= '9')
693 #define islower(c) ('a' <= (c) && (c) <= 'z')
694 #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
696 static unsigned long prom_strtoul(const char *cp
, const char **endp
)
698 unsigned long result
= 0, base
= 10, value
;
703 if (toupper(*cp
) == 'X') {
709 while (isxdigit(*cp
) &&
710 (value
= isdigit(*cp
) ? *cp
- '0' : toupper(*cp
) - 'A' + 10) < base
) {
711 result
= result
* base
+ value
;
721 static unsigned long prom_memparse(const char *ptr
, const char **retptr
)
723 unsigned long ret
= prom_strtoul(ptr
, retptr
);
727 * We can't use a switch here because GCC *may* generate a
728 * jump table which won't work, because we're not running at
729 * the address we're linked at.
731 if ('G' == **retptr
|| 'g' == **retptr
)
734 if ('M' == **retptr
|| 'm' == **retptr
)
737 if ('K' == **retptr
|| 'k' == **retptr
)
749 * Early parsing of the command line passed to the kernel, used for
750 * "mem=x" and the options that affect the iommu
752 static void __init
early_cmdline_parse(void)
759 prom_cmd_line
[0] = 0;
761 if ((long)prom
.chosen
> 0)
762 l
= prom_getprop(prom
.chosen
, "bootargs", p
, COMMAND_LINE_SIZE
-1);
763 if (IS_ENABLED(CONFIG_CMDLINE_BOOL
) && (l
<= 0 || p
[0] == '\0')) /* dbl check */
764 prom_strlcpy(prom_cmd_line
, CONFIG_CMDLINE
, sizeof(prom_cmd_line
));
765 prom_printf("command line: %s\n", prom_cmd_line
);
768 opt
= prom_strstr(prom_cmd_line
, "iommu=");
770 prom_printf("iommu opt is: %s\n", opt
);
772 while (*opt
&& *opt
== ' ')
774 if (!prom_strncmp(opt
, "off", 3))
776 else if (!prom_strncmp(opt
, "force", 5))
777 prom_iommu_force_on
= 1;
780 opt
= prom_strstr(prom_cmd_line
, "mem=");
783 prom_memory_limit
= prom_memparse(opt
, (const char **)&opt
);
785 /* Align to 16 MB == size of ppc64 large page */
786 prom_memory_limit
= ALIGN(prom_memory_limit
, 0x1000000);
790 #ifdef CONFIG_PPC_PSERIES
791 prom_radix_disable
= !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT
);
792 opt
= prom_strstr(prom_cmd_line
, "disable_radix");
795 if (*opt
&& *opt
== '=') {
798 if (prom_strtobool(++opt
, &val
))
799 prom_radix_disable
= false;
801 prom_radix_disable
= val
;
803 prom_radix_disable
= true;
805 if (prom_radix_disable
)
806 prom_debug("Radix disabled from cmdline\n");
807 #endif /* CONFIG_PPC_PSERIES */
810 #ifdef CONFIG_PPC_PSERIES
812 * The architecture vector has an array of PVR mask/value pairs,
813 * followed by # option vectors - 1, followed by the option vectors.
815 * See prom.h for the definition of the bits specified in the
816 * architecture vector.
819 /* Firmware expects the value to be n - 1, where n is the # of vectors */
820 #define NUM_VECTORS(n) ((n) - 1)
823 * Firmware expects 1 + n - 2, where n is the length of the option vector in
824 * bytes. The 1 accounts for the length byte itself, the - 2 .. ?
826 #define VECTOR_LENGTH(n) (1 + (n) - 2)
828 struct option_vector1
{
834 struct option_vector2
{
848 struct option_vector3
{
853 struct option_vector4
{
858 struct option_vector5
{
870 u8 platform_facilities
;
881 struct option_vector6
{
887 struct ibm_arch_vec
{
888 struct { u32 mask
, val
; } pvrs
[12];
893 struct option_vector1 vec1
;
896 struct option_vector2 vec2
;
899 struct option_vector3 vec3
;
902 struct option_vector4 vec4
;
905 struct option_vector5 vec5
;
908 struct option_vector6 vec6
;
911 static const struct ibm_arch_vec ibm_architecture_vec_template __initconst
= {
914 .mask
= cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */
915 .val
= cpu_to_be32(0x003a0000),
918 .mask
= cpu_to_be32(0xffff0000), /* POWER6 */
919 .val
= cpu_to_be32(0x003e0000),
922 .mask
= cpu_to_be32(0xffff0000), /* POWER7 */
923 .val
= cpu_to_be32(0x003f0000),
926 .mask
= cpu_to_be32(0xffff0000), /* POWER8E */
927 .val
= cpu_to_be32(0x004b0000),
930 .mask
= cpu_to_be32(0xffff0000), /* POWER8NVL */
931 .val
= cpu_to_be32(0x004c0000),
934 .mask
= cpu_to_be32(0xffff0000), /* POWER8 */
935 .val
= cpu_to_be32(0x004d0000),
938 .mask
= cpu_to_be32(0xffff0000), /* POWER9 */
939 .val
= cpu_to_be32(0x004e0000),
942 .mask
= cpu_to_be32(0xffffffff), /* all 3.00-compliant */
943 .val
= cpu_to_be32(0x0f000005),
946 .mask
= cpu_to_be32(0xffffffff), /* all 2.07-compliant */
947 .val
= cpu_to_be32(0x0f000004),
950 .mask
= cpu_to_be32(0xffffffff), /* all 2.06-compliant */
951 .val
= cpu_to_be32(0x0f000003),
954 .mask
= cpu_to_be32(0xffffffff), /* all 2.05-compliant */
955 .val
= cpu_to_be32(0x0f000002),
958 .mask
= cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */
959 .val
= cpu_to_be32(0x0f000001),
963 .num_vectors
= NUM_VECTORS(6),
965 .vec1_len
= VECTOR_LENGTH(sizeof(struct option_vector1
)),
968 .arch_versions
= OV1_PPC_2_00
| OV1_PPC_2_01
| OV1_PPC_2_02
| OV1_PPC_2_03
|
969 OV1_PPC_2_04
| OV1_PPC_2_05
| OV1_PPC_2_06
| OV1_PPC_2_07
,
970 .arch_versions3
= OV1_PPC_3_00
,
973 .vec2_len
= VECTOR_LENGTH(sizeof(struct option_vector2
)),
974 /* option vector 2: Open Firmware options supported */
976 .byte1
= OV2_REAL_MODE
,
978 .real_base
= cpu_to_be32(0xffffffff),
979 .real_size
= cpu_to_be32(0xffffffff),
980 .virt_base
= cpu_to_be32(0xffffffff),
981 .virt_size
= cpu_to_be32(0xffffffff),
982 .load_base
= cpu_to_be32(0xffffffff),
983 .min_rma
= cpu_to_be32(512), /* 512MB min RMA */
984 .min_load
= cpu_to_be32(0xffffffff), /* full client load */
985 .min_rma_percent
= 0, /* min RMA percentage of total RAM */
986 .max_pft_size
= 48, /* max log_2(hash table size) */
989 .vec3_len
= VECTOR_LENGTH(sizeof(struct option_vector3
)),
990 /* option vector 3: processor options supported */
992 .byte1
= 0, /* don't ignore, don't halt */
993 .byte2
= OV3_FP
| OV3_VMX
| OV3_DFP
,
996 .vec4_len
= VECTOR_LENGTH(sizeof(struct option_vector4
)),
997 /* option vector 4: IBM PAPR implementation */
999 .byte1
= 0, /* don't halt */
1000 .min_vp_cap
= OV4_MIN_ENT_CAP
, /* minimum VP entitled capacity */
1003 .vec5_len
= VECTOR_LENGTH(sizeof(struct option_vector5
)),
1004 /* option vector 5: PAPR/OF options */
1006 .byte1
= 0, /* don't ignore, don't halt */
1007 .byte2
= OV5_FEAT(OV5_LPAR
) | OV5_FEAT(OV5_SPLPAR
) | OV5_FEAT(OV5_LARGE_PAGES
) |
1008 OV5_FEAT(OV5_DRCONF_MEMORY
) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU
) |
1009 #ifdef CONFIG_PCI_MSI
1010 /* PCIe/MSI support. Without MSI full PCIe is not supported */
1017 #ifdef CONFIG_PPC_SMLPAR
1018 OV5_FEAT(OV5_CMO
) | OV5_FEAT(OV5_XCMO
),
1022 .associativity
= OV5_FEAT(OV5_TYPE1_AFFINITY
) | OV5_FEAT(OV5_PRRN
),
1023 .bin_opts
= OV5_FEAT(OV5_RESIZE_HPT
) | OV5_FEAT(OV5_HP_EVT
),
1024 .micro_checkpoint
= 0,
1026 .max_cpus
= cpu_to_be32(NR_CPUS
), /* number of cores supported */
1029 .platform_facilities
= OV5_FEAT(OV5_PFO_HW_RNG
) | OV5_FEAT(OV5_PFO_HW_ENCR
) | OV5_FEAT(OV5_PFO_HW_842
),
1033 .byte22
= OV5_FEAT(OV5_DRMEM_V2
),
1040 /* option vector 6: IBM PAPR hints */
1041 .vec6_len
= VECTOR_LENGTH(sizeof(struct option_vector6
)),
1044 .secondary_pteg
= 0,
1045 .os_name
= OV6_LINUX
,
1049 static struct ibm_arch_vec __prombss ibm_architecture_vec ____cacheline_aligned
;
1051 /* Old method - ELF header with PT_NOTE sections only works on BE */
1052 #ifdef __BIG_ENDIAN__
1053 static const struct fake_elf
{
1060 char name
[8]; /* "PowerPC" */
1074 char name
[24]; /* "IBM,RPA-Client-Config" */
1078 u32 min_rmo_percent
;
1086 } fake_elf __initconst
= {
1088 .e_ident
= { 0x7f, 'E', 'L', 'F',
1089 ELFCLASS32
, ELFDATA2MSB
, EV_CURRENT
},
1090 .e_type
= ET_EXEC
, /* yeah right */
1091 .e_machine
= EM_PPC
,
1092 .e_version
= EV_CURRENT
,
1093 .e_phoff
= offsetof(struct fake_elf
, phdr
),
1094 .e_phentsize
= sizeof(Elf32_Phdr
),
1100 .p_offset
= offsetof(struct fake_elf
, chrpnote
),
1101 .p_filesz
= sizeof(struct chrpnote
)
1104 .p_offset
= offsetof(struct fake_elf
, rpanote
),
1105 .p_filesz
= sizeof(struct rpanote
)
1109 .namesz
= sizeof("PowerPC"),
1110 .descsz
= sizeof(struct chrpdesc
),
1114 .real_mode
= ~0U, /* ~0 means "don't care" */
1123 .namesz
= sizeof("IBM,RPA-Client-Config"),
1124 .descsz
= sizeof(struct rpadesc
),
1126 .name
= "IBM,RPA-Client-Config",
1129 .min_rmo_size
= 64, /* in megabytes */
1130 .min_rmo_percent
= 0,
1131 .max_pft_size
= 48, /* 2^48 bytes max PFT size */
1138 #endif /* __BIG_ENDIAN__ */
1140 static int __init
prom_count_smt_threads(void)
1146 /* Pick up th first CPU node we can find */
1147 for (node
= 0; prom_next_node(&node
); ) {
1149 prom_getprop(node
, "device_type", type
, sizeof(type
));
1151 if (prom_strcmp(type
, "cpu"))
1154 * There is an entry for each smt thread, each entry being
1155 * 4 bytes long. All cpus should have the same number of
1156 * smt threads, so return after finding the first.
1158 plen
= prom_getproplen(node
, "ibm,ppc-interrupt-server#s");
1159 if (plen
== PROM_ERROR
)
1162 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen
);
1165 if (plen
< 1 || plen
> 64) {
1166 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
1167 (unsigned long)plen
);
1172 prom_debug("No threads found, assuming 1 per core\n");
1178 static void __init
prom_parse_mmu_model(u8 val
,
1179 struct platform_support
*support
)
1182 case OV5_FEAT(OV5_MMU_DYNAMIC
):
1183 case OV5_FEAT(OV5_MMU_EITHER
): /* Either Available */
1184 prom_debug("MMU - either supported\n");
1185 support
->radix_mmu
= !prom_radix_disable
;
1186 support
->hash_mmu
= true;
1188 case OV5_FEAT(OV5_MMU_RADIX
): /* Only Radix */
1189 prom_debug("MMU - radix only\n");
1190 if (prom_radix_disable
) {
1192 * If we __have__ to do radix, we're better off ignoring
1193 * the command line rather than not booting.
1195 prom_printf("WARNING: Ignoring cmdline option disable_radix\n");
1197 support
->radix_mmu
= true;
1199 case OV5_FEAT(OV5_MMU_HASH
):
1200 prom_debug("MMU - hash only\n");
1201 support
->hash_mmu
= true;
1204 prom_debug("Unknown mmu support option: 0x%x\n", val
);
1209 static void __init
prom_parse_xive_model(u8 val
,
1210 struct platform_support
*support
)
1213 case OV5_FEAT(OV5_XIVE_EITHER
): /* Either Available */
1214 prom_debug("XIVE - either mode supported\n");
1215 support
->xive
= true;
1217 case OV5_FEAT(OV5_XIVE_EXPLOIT
): /* Only Exploitation mode */
1218 prom_debug("XIVE - exploitation mode supported\n");
1219 support
->xive
= true;
1221 case OV5_FEAT(OV5_XIVE_LEGACY
): /* Only Legacy mode */
1222 prom_debug("XIVE - legacy mode supported\n");
1225 prom_debug("Unknown xive support option: 0x%x\n", val
);
1230 static void __init
prom_parse_platform_support(u8 index
, u8 val
,
1231 struct platform_support
*support
)
1234 case OV5_INDX(OV5_MMU_SUPPORT
): /* MMU Model */
1235 prom_parse_mmu_model(val
& OV5_FEAT(OV5_MMU_SUPPORT
), support
);
1237 case OV5_INDX(OV5_RADIX_GTSE
): /* Radix Extensions */
1238 if (val
& OV5_FEAT(OV5_RADIX_GTSE
)) {
1239 prom_debug("Radix - GTSE supported\n");
1240 support
->radix_gtse
= true;
1243 case OV5_INDX(OV5_XIVE_SUPPORT
): /* Interrupt mode */
1244 prom_parse_xive_model(val
& OV5_FEAT(OV5_XIVE_SUPPORT
),
1250 static void __init
prom_check_platform_support(void)
1252 struct platform_support supported
= {
1255 .radix_gtse
= false,
1258 int prop_len
= prom_getproplen(prom
.chosen
,
1259 "ibm,arch-vec-5-platform-support");
1262 * First copy the architecture vec template
1264 * use memcpy() instead of *vec = *vec_template so that GCC replaces it
1265 * by __memcpy() when KASAN is active
1267 memcpy(&ibm_architecture_vec
, &ibm_architecture_vec_template
,
1268 sizeof(ibm_architecture_vec
));
1273 prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n",
1275 if (prop_len
> sizeof(vec
))
1276 prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n",
1278 prom_getprop(prom
.chosen
, "ibm,arch-vec-5-platform-support",
1280 for (i
= 0; i
< sizeof(vec
); i
+= 2) {
1281 prom_debug("%d: index = 0x%x val = 0x%x\n", i
/ 2
1284 prom_parse_platform_support(vec
[i
], vec
[i
+ 1],
1289 if (supported
.radix_mmu
&& supported
.radix_gtse
&&
1290 IS_ENABLED(CONFIG_PPC_RADIX_MMU
)) {
1291 /* Radix preferred - but we require GTSE for now */
1292 prom_debug("Asking for radix with GTSE\n");
1293 ibm_architecture_vec
.vec5
.mmu
= OV5_FEAT(OV5_MMU_RADIX
);
1294 ibm_architecture_vec
.vec5
.radix_ext
= OV5_FEAT(OV5_RADIX_GTSE
);
1295 } else if (supported
.hash_mmu
) {
1296 /* Default to hash mmu (if we can) */
1297 prom_debug("Asking for hash\n");
1298 ibm_architecture_vec
.vec5
.mmu
= OV5_FEAT(OV5_MMU_HASH
);
1300 /* We're probably on a legacy hypervisor */
1301 prom_debug("Assuming legacy hash support\n");
1304 if (supported
.xive
) {
1305 prom_debug("Asking for XIVE\n");
1306 ibm_architecture_vec
.vec5
.intarch
= OV5_FEAT(OV5_XIVE_EXPLOIT
);
1310 static void __init
prom_send_capabilities(void)
1316 /* Check ibm,arch-vec-5-platform-support and fixup vec5 if required */
1317 prom_check_platform_support();
1319 root
= call_prom("open", 1, 1, ADDR("/"));
1321 /* We need to tell the FW about the number of cores we support.
1323 * To do that, we count the number of threads on the first core
1324 * (we assume this is the same for all cores) and use it to
1328 cores
= DIV_ROUND_UP(NR_CPUS
, prom_count_smt_threads());
1329 prom_printf("Max number of cores passed to firmware: %u (NR_CPUS = %d)\n",
1332 ibm_architecture_vec
.vec5
.max_cpus
= cpu_to_be32(cores
);
1334 /* try calling the ibm,client-architecture-support method */
1335 prom_printf("Calling ibm,client-architecture-support...");
1336 if (call_prom_ret("call-method", 3, 2, &ret
,
1337 ADDR("ibm,client-architecture-support"),
1339 ADDR(&ibm_architecture_vec
)) == 0) {
1340 /* the call exists... */
1342 prom_printf("\nWARNING: ibm,client-architecture"
1343 "-support call FAILED!\n");
1344 call_prom("close", 1, 0, root
);
1345 prom_printf(" done\n");
1348 call_prom("close", 1, 0, root
);
1349 prom_printf(" not implemented\n");
1352 #ifdef __BIG_ENDIAN__
1356 /* no ibm,client-architecture-support call, try the old way */
1357 elfloader
= call_prom("open", 1, 1,
1358 ADDR("/packages/elf-loader"));
1359 if (elfloader
== 0) {
1360 prom_printf("couldn't open /packages/elf-loader\n");
1363 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
1364 elfloader
, ADDR(&fake_elf
));
1365 call_prom("close", 1, 0, elfloader
);
1367 #endif /* __BIG_ENDIAN__ */
1369 #endif /* CONFIG_PPC_PSERIES */
1372 * Memory allocation strategy... our layout is normally:
1374 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
1375 * rare cases, initrd might end up being before the kernel though.
1376 * We assume this won't override the final kernel at 0, we have no
1377 * provision to handle that in this version, but it should hopefully
1380 * alloc_top is set to the top of RMO, eventually shrink down if the
1383 * alloc_bottom is set to the top of kernel/initrd
1385 * from there, allocations are done this way : rtas is allocated
1386 * topmost, and the device-tree is allocated from the bottom. We try
1387 * to grow the device-tree allocation as we progress. If we can't,
1388 * then we fail, we don't currently have a facility to restart
1389 * elsewhere, but that shouldn't be necessary.
1391 * Note that calls to reserve_mem have to be done explicitly, memory
1392 * allocated with either alloc_up or alloc_down isn't automatically
1398 * Allocates memory in the RMO upward from the kernel/initrd
1400 * When align is 0, this is a special case, it means to allocate in place
1401 * at the current location of alloc_bottom or fail (that is basically
1402 * extending the previous allocation). Used for the device-tree flattening
1404 static unsigned long __init
alloc_up(unsigned long size
, unsigned long align
)
1406 unsigned long base
= alloc_bottom
;
1407 unsigned long addr
= 0;
1410 base
= _ALIGN_UP(base
, align
);
1411 prom_debug("%s(%lx, %lx)\n", __func__
, size
, align
);
1413 prom_panic("alloc_up() called with mem not initialized\n");
1416 base
= _ALIGN_UP(alloc_bottom
, align
);
1418 base
= alloc_bottom
;
1420 for(; (base
+ size
) <= alloc_top
;
1421 base
= _ALIGN_UP(base
+ 0x100000, align
)) {
1422 prom_debug(" trying: 0x%lx\n\r", base
);
1423 addr
= (unsigned long)prom_claim(base
, size
, 0);
1424 if (addr
!= PROM_ERROR
&& addr
!= 0)
1432 alloc_bottom
= addr
+ size
;
1434 prom_debug(" -> %lx\n", addr
);
1435 prom_debug(" alloc_bottom : %lx\n", alloc_bottom
);
1436 prom_debug(" alloc_top : %lx\n", alloc_top
);
1437 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high
);
1438 prom_debug(" rmo_top : %lx\n", rmo_top
);
1439 prom_debug(" ram_top : %lx\n", ram_top
);
1445 * Allocates memory downward, either from top of RMO, or if highmem
1446 * is set, from the top of RAM. Note that this one doesn't handle
1447 * failures. It does claim memory if highmem is not set.
1449 static unsigned long __init
alloc_down(unsigned long size
, unsigned long align
,
1452 unsigned long base
, addr
= 0;
1454 prom_debug("%s(%lx, %lx, %s)\n", __func__
, size
, align
,
1455 highmem
? "(high)" : "(low)");
1457 prom_panic("alloc_down() called with mem not initialized\n");
1460 /* Carve out storage for the TCE table. */
1461 addr
= _ALIGN_DOWN(alloc_top_high
- size
, align
);
1462 if (addr
<= alloc_bottom
)
1464 /* Will we bump into the RMO ? If yes, check out that we
1465 * didn't overlap existing allocations there, if we did,
1466 * we are dead, we must be the first in town !
1468 if (addr
< rmo_top
) {
1469 /* Good, we are first */
1470 if (alloc_top
== rmo_top
)
1471 alloc_top
= rmo_top
= addr
;
1475 alloc_top_high
= addr
;
1479 base
= _ALIGN_DOWN(alloc_top
- size
, align
);
1480 for (; base
> alloc_bottom
;
1481 base
= _ALIGN_DOWN(base
- 0x100000, align
)) {
1482 prom_debug(" trying: 0x%lx\n\r", base
);
1483 addr
= (unsigned long)prom_claim(base
, size
, 0);
1484 if (addr
!= PROM_ERROR
&& addr
!= 0)
1493 prom_debug(" -> %lx\n", addr
);
1494 prom_debug(" alloc_bottom : %lx\n", alloc_bottom
);
1495 prom_debug(" alloc_top : %lx\n", alloc_top
);
1496 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high
);
1497 prom_debug(" rmo_top : %lx\n", rmo_top
);
1498 prom_debug(" ram_top : %lx\n", ram_top
);
1504 * Parse a "reg" cell
1506 static unsigned long __init
prom_next_cell(int s
, cell_t
**cellp
)
1509 unsigned long r
= 0;
1511 /* Ignore more than 2 cells */
1512 while (s
> sizeof(unsigned long) / 4) {
1516 r
= be32_to_cpu(*p
++);
1520 r
|= be32_to_cpu(*(p
++));
1528 * Very dumb function for adding to the memory reserve list, but
1529 * we don't need anything smarter at this point
1531 * XXX Eventually check for collisions. They should NEVER happen.
1532 * If problems seem to show up, it would be a good start to track
1535 static void __init
reserve_mem(u64 base
, u64 size
)
1537 u64 top
= base
+ size
;
1538 unsigned long cnt
= mem_reserve_cnt
;
1543 /* We need to always keep one empty entry so that we
1544 * have our terminator with "size" set to 0 since we are
1545 * dumb and just copy this entire array to the boot params
1547 base
= _ALIGN_DOWN(base
, PAGE_SIZE
);
1548 top
= _ALIGN_UP(top
, PAGE_SIZE
);
1551 if (cnt
>= (MEM_RESERVE_MAP_SIZE
- 1))
1552 prom_panic("Memory reserve map exhausted !\n");
1553 mem_reserve_map
[cnt
].base
= cpu_to_be64(base
);
1554 mem_reserve_map
[cnt
].size
= cpu_to_be64(size
);
1555 mem_reserve_cnt
= cnt
+ 1;
1559 * Initialize memory allocation mechanism, parse "memory" nodes and
1560 * obtain that way the top of memory and RMO to setup out local allocator
1562 static void __init
prom_init_mem(void)
1575 * We iterate the memory nodes to find
1576 * 1) top of RMO (first node)
1579 val
= cpu_to_be32(2);
1580 prom_getprop(prom
.root
, "#address-cells", &val
, sizeof(val
));
1581 rac
= be32_to_cpu(val
);
1582 val
= cpu_to_be32(1);
1583 prom_getprop(prom
.root
, "#size-cells", &val
, sizeof(rsc
));
1584 rsc
= be32_to_cpu(val
);
1585 prom_debug("root_addr_cells: %x\n", rac
);
1586 prom_debug("root_size_cells: %x\n", rsc
);
1588 prom_debug("scanning memory:\n");
1590 path
= prom_scratch
;
1593 for (node
= 0; prom_next_node(&node
); ) {
1595 prom_getprop(node
, "device_type", type
, sizeof(type
));
1599 * CHRP Longtrail machines have no device_type
1600 * on the memory node, so check the name instead...
1602 prom_getprop(node
, "name", type
, sizeof(type
));
1604 if (prom_strcmp(type
, "memory"))
1607 plen
= prom_getprop(node
, "reg", regbuf
, sizeof(regbuf
));
1608 if (plen
> sizeof(regbuf
)) {
1609 prom_printf("memory node too large for buffer !\n");
1610 plen
= sizeof(regbuf
);
1613 endp
= p
+ (plen
/ sizeof(cell_t
));
1616 memset(path
, 0, sizeof(prom_scratch
));
1617 call_prom("package-to-path", 3, 1, node
, path
, sizeof(prom_scratch
) - 1);
1618 prom_debug(" node %s :\n", path
);
1619 #endif /* DEBUG_PROM */
1621 while ((endp
- p
) >= (rac
+ rsc
)) {
1622 unsigned long base
, size
;
1624 base
= prom_next_cell(rac
, &p
);
1625 size
= prom_next_cell(rsc
, &p
);
1629 prom_debug(" %lx %lx\n", base
, size
);
1630 if (base
== 0 && (of_platform
& PLATFORM_LPAR
))
1632 if ((base
+ size
) > ram_top
)
1633 ram_top
= base
+ size
;
1637 alloc_bottom
= PAGE_ALIGN((unsigned long)&_end
+ 0x4000);
1640 * If prom_memory_limit is set we reduce the upper limits *except* for
1641 * alloc_top_high. This must be the real top of RAM so we can put
1645 alloc_top_high
= ram_top
;
1647 if (prom_memory_limit
) {
1648 if (prom_memory_limit
<= alloc_bottom
) {
1649 prom_printf("Ignoring mem=%lx <= alloc_bottom.\n",
1651 prom_memory_limit
= 0;
1652 } else if (prom_memory_limit
>= ram_top
) {
1653 prom_printf("Ignoring mem=%lx >= ram_top.\n",
1655 prom_memory_limit
= 0;
1657 ram_top
= prom_memory_limit
;
1658 rmo_top
= min(rmo_top
, prom_memory_limit
);
1663 * Setup our top alloc point, that is top of RMO or top of
1664 * segment 0 when running non-LPAR.
1665 * Some RS64 machines have buggy firmware where claims up at
1666 * 1GB fail. Cap at 768MB as a workaround.
1667 * Since 768MB is plenty of room, and we need to cap to something
1668 * reasonable on 32-bit, cap at 768MB on all machines.
1672 rmo_top
= min(0x30000000ul
, rmo_top
);
1673 alloc_top
= rmo_top
;
1674 alloc_top_high
= ram_top
;
1677 * Check if we have an initrd after the kernel but still inside
1678 * the RMO. If we do move our bottom point to after it.
1680 if (prom_initrd_start
&&
1681 prom_initrd_start
< rmo_top
&&
1682 prom_initrd_end
> alloc_bottom
)
1683 alloc_bottom
= PAGE_ALIGN(prom_initrd_end
);
1685 prom_printf("memory layout at init:\n");
1686 prom_printf(" memory_limit : %lx (16 MB aligned)\n",
1688 prom_printf(" alloc_bottom : %lx\n", alloc_bottom
);
1689 prom_printf(" alloc_top : %lx\n", alloc_top
);
1690 prom_printf(" alloc_top_hi : %lx\n", alloc_top_high
);
1691 prom_printf(" rmo_top : %lx\n", rmo_top
);
1692 prom_printf(" ram_top : %lx\n", ram_top
);
1695 static void __init
prom_close_stdin(void)
1700 if (prom_getprop(prom
.chosen
, "stdin", &val
, sizeof(val
)) > 0) {
1701 stdin
= be32_to_cpu(val
);
1702 call_prom("close", 1, 0, stdin
);
1707 * Allocate room for and instantiate RTAS
1709 static void __init
prom_instantiate_rtas(void)
1713 u32 base
, entry
= 0;
1717 prom_debug("prom_instantiate_rtas: start...\n");
1719 rtas_node
= call_prom("finddevice", 1, 1, ADDR("/rtas"));
1720 prom_debug("rtas_node: %x\n", rtas_node
);
1721 if (!PHANDLE_VALID(rtas_node
))
1725 prom_getprop(rtas_node
, "rtas-size", &val
, sizeof(size
));
1726 size
= be32_to_cpu(val
);
1730 base
= alloc_down(size
, PAGE_SIZE
, 0);
1732 prom_panic("Could not allocate memory for RTAS\n");
1734 rtas_inst
= call_prom("open", 1, 1, ADDR("/rtas"));
1735 if (!IHANDLE_VALID(rtas_inst
)) {
1736 prom_printf("opening rtas package failed (%x)\n", rtas_inst
);
1740 prom_printf("instantiating rtas at 0x%x...", base
);
1742 if (call_prom_ret("call-method", 3, 2, &entry
,
1743 ADDR("instantiate-rtas"),
1744 rtas_inst
, base
) != 0
1746 prom_printf(" failed\n");
1749 prom_printf(" done\n");
1751 reserve_mem(base
, size
);
1753 val
= cpu_to_be32(base
);
1754 prom_setprop(rtas_node
, "/rtas", "linux,rtas-base",
1756 val
= cpu_to_be32(entry
);
1757 prom_setprop(rtas_node
, "/rtas", "linux,rtas-entry",
1760 /* Check if it supports "query-cpu-stopped-state" */
1761 if (prom_getprop(rtas_node
, "query-cpu-stopped-state",
1762 &val
, sizeof(val
)) != PROM_ERROR
)
1763 rtas_has_query_cpu_stopped
= true;
1765 prom_debug("rtas base = 0x%x\n", base
);
1766 prom_debug("rtas entry = 0x%x\n", entry
);
1767 prom_debug("rtas size = 0x%x\n", size
);
1769 prom_debug("prom_instantiate_rtas: end...\n");
1774 * Allocate room for and instantiate Stored Measurement Log (SML)
1776 static void __init
prom_instantiate_sml(void)
1778 phandle ibmvtpm_node
;
1779 ihandle ibmvtpm_inst
;
1780 u32 entry
= 0, size
= 0, succ
= 0;
1784 prom_debug("prom_instantiate_sml: start...\n");
1786 ibmvtpm_node
= call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
1787 prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node
);
1788 if (!PHANDLE_VALID(ibmvtpm_node
))
1791 ibmvtpm_inst
= call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
1792 if (!IHANDLE_VALID(ibmvtpm_inst
)) {
1793 prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst
);
1797 if (prom_getprop(ibmvtpm_node
, "ibm,sml-efi-reformat-supported",
1798 &val
, sizeof(val
)) != PROM_ERROR
) {
1799 if (call_prom_ret("call-method", 2, 2, &succ
,
1800 ADDR("reformat-sml-to-efi-alignment"),
1801 ibmvtpm_inst
) != 0 || succ
== 0) {
1802 prom_printf("Reformat SML to EFI alignment failed\n");
1806 if (call_prom_ret("call-method", 2, 2, &size
,
1807 ADDR("sml-get-allocated-size"),
1808 ibmvtpm_inst
) != 0 || size
== 0) {
1809 prom_printf("SML get allocated size failed\n");
1813 if (call_prom_ret("call-method", 2, 2, &size
,
1814 ADDR("sml-get-handover-size"),
1815 ibmvtpm_inst
) != 0 || size
== 0) {
1816 prom_printf("SML get handover size failed\n");
1821 base
= alloc_down(size
, PAGE_SIZE
, 0);
1823 prom_panic("Could not allocate memory for sml\n");
1825 prom_printf("instantiating sml at 0x%llx...", base
);
1827 memset((void *)base
, 0, size
);
1829 if (call_prom_ret("call-method", 4, 2, &entry
,
1830 ADDR("sml-handover"),
1831 ibmvtpm_inst
, size
, base
) != 0 || entry
== 0) {
1832 prom_printf("SML handover failed\n");
1835 prom_printf(" done\n");
1837 reserve_mem(base
, size
);
1839 prom_setprop(ibmvtpm_node
, "/vdevice/vtpm", "linux,sml-base",
1840 &base
, sizeof(base
));
1841 prom_setprop(ibmvtpm_node
, "/vdevice/vtpm", "linux,sml-size",
1842 &size
, sizeof(size
));
1844 prom_debug("sml base = 0x%llx\n", base
);
1845 prom_debug("sml size = 0x%x\n", size
);
1847 prom_debug("prom_instantiate_sml: end...\n");
1851 * Allocate room for and initialize TCE tables
1853 #ifdef __BIG_ENDIAN__
1854 static void __init
prom_initialize_tce_table(void)
1858 char compatible
[64], type
[64], model
[64];
1859 char *path
= prom_scratch
;
1861 u32 minalign
, minsize
;
1862 u64 tce_entry
, *tce_entryp
;
1863 u64 local_alloc_top
, local_alloc_bottom
;
1869 prom_debug("starting prom_initialize_tce_table\n");
1871 /* Cache current top of allocs so we reserve a single block */
1872 local_alloc_top
= alloc_top_high
;
1873 local_alloc_bottom
= local_alloc_top
;
1875 /* Search all nodes looking for PHBs. */
1876 for (node
= 0; prom_next_node(&node
); ) {
1880 prom_getprop(node
, "compatible",
1881 compatible
, sizeof(compatible
));
1882 prom_getprop(node
, "device_type", type
, sizeof(type
));
1883 prom_getprop(node
, "model", model
, sizeof(model
));
1885 if ((type
[0] == 0) || (prom_strstr(type
, "pci") == NULL
))
1888 /* Keep the old logic intact to avoid regression. */
1889 if (compatible
[0] != 0) {
1890 if ((prom_strstr(compatible
, "python") == NULL
) &&
1891 (prom_strstr(compatible
, "Speedwagon") == NULL
) &&
1892 (prom_strstr(compatible
, "Winnipeg") == NULL
))
1894 } else if (model
[0] != 0) {
1895 if ((prom_strstr(model
, "ython") == NULL
) &&
1896 (prom_strstr(model
, "peedwagon") == NULL
) &&
1897 (prom_strstr(model
, "innipeg") == NULL
))
1901 if (prom_getprop(node
, "tce-table-minalign", &minalign
,
1902 sizeof(minalign
)) == PROM_ERROR
)
1904 if (prom_getprop(node
, "tce-table-minsize", &minsize
,
1905 sizeof(minsize
)) == PROM_ERROR
)
1906 minsize
= 4UL << 20;
1909 * Even though we read what OF wants, we just set the table
1910 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
1911 * By doing this, we avoid the pitfalls of trying to DMA to
1912 * MMIO space and the DMA alias hole.
1914 minsize
= 4UL << 20;
1916 /* Align to the greater of the align or size */
1917 align
= max(minalign
, minsize
);
1918 base
= alloc_down(minsize
, align
, 1);
1920 prom_panic("ERROR, cannot find space for TCE table.\n");
1921 if (base
< local_alloc_bottom
)
1922 local_alloc_bottom
= base
;
1924 /* It seems OF doesn't null-terminate the path :-( */
1925 memset(path
, 0, sizeof(prom_scratch
));
1926 /* Call OF to setup the TCE hardware */
1927 if (call_prom("package-to-path", 3, 1, node
,
1928 path
, sizeof(prom_scratch
) - 1) == PROM_ERROR
) {
1929 prom_printf("package-to-path failed\n");
1932 /* Save away the TCE table attributes for later use. */
1933 prom_setprop(node
, path
, "linux,tce-base", &base
, sizeof(base
));
1934 prom_setprop(node
, path
, "linux,tce-size", &minsize
, sizeof(minsize
));
1936 prom_debug("TCE table: %s\n", path
);
1937 prom_debug("\tnode = 0x%x\n", node
);
1938 prom_debug("\tbase = 0x%llx\n", base
);
1939 prom_debug("\tsize = 0x%x\n", minsize
);
1941 /* Initialize the table to have a one-to-one mapping
1942 * over the allocated size.
1944 tce_entryp
= (u64
*)base
;
1945 for (i
= 0; i
< (minsize
>> 3) ;tce_entryp
++, i
++) {
1946 tce_entry
= (i
<< PAGE_SHIFT
);
1948 *tce_entryp
= tce_entry
;
1951 prom_printf("opening PHB %s", path
);
1952 phb_node
= call_prom("open", 1, 1, path
);
1954 prom_printf("... failed\n");
1956 prom_printf("... done\n");
1958 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
1959 phb_node
, -1, minsize
,
1960 (u32
) base
, (u32
) (base
>> 32));
1961 call_prom("close", 1, 0, phb_node
);
1964 reserve_mem(local_alloc_bottom
, local_alloc_top
- local_alloc_bottom
);
1966 /* These are only really needed if there is a memory limit in
1967 * effect, but we don't know so export them always. */
1968 prom_tce_alloc_start
= local_alloc_bottom
;
1969 prom_tce_alloc_end
= local_alloc_top
;
1971 /* Flag the first invalid entry */
1972 prom_debug("ending prom_initialize_tce_table\n");
1974 #endif /* __BIG_ENDIAN__ */
1975 #endif /* CONFIG_PPC64 */
1978 * With CHRP SMP we need to use the OF to start the other processors.
1979 * We can't wait until smp_boot_cpus (the OF is trashed by then)
1980 * so we have to put the processors into a holding pattern controlled
1981 * by the kernel (not OF) before we destroy the OF.
1983 * This uses a chunk of low memory, puts some holding pattern
1984 * code there and sends the other processors off to there until
1985 * smp_boot_cpus tells them to do something. The holding pattern
1986 * checks that address until its cpu # is there, when it is that
1987 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
1988 * of setting those values.
1990 * We also use physical address 0x4 here to tell when a cpu
1991 * is in its holding pattern code.
1996 * We want to reference the copy of __secondary_hold_* in the
1997 * 0 - 0x100 address range
1999 #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
2001 static void __init
prom_hold_cpus(void)
2006 unsigned long *spinloop
2007 = (void *) LOW_ADDR(__secondary_hold_spinloop
);
2008 unsigned long *acknowledge
2009 = (void *) LOW_ADDR(__secondary_hold_acknowledge
);
2010 unsigned long secondary_hold
= LOW_ADDR(__secondary_hold
);
2013 * On pseries, if RTAS supports "query-cpu-stopped-state",
2014 * we skip this stage, the CPUs will be started by the
2015 * kernel using RTAS.
2017 if ((of_platform
== PLATFORM_PSERIES
||
2018 of_platform
== PLATFORM_PSERIES_LPAR
) &&
2019 rtas_has_query_cpu_stopped
) {
2020 prom_printf("prom_hold_cpus: skipped\n");
2024 prom_debug("prom_hold_cpus: start...\n");
2025 prom_debug(" 1) spinloop = 0x%lx\n", (unsigned long)spinloop
);
2026 prom_debug(" 1) *spinloop = 0x%lx\n", *spinloop
);
2027 prom_debug(" 1) acknowledge = 0x%lx\n",
2028 (unsigned long)acknowledge
);
2029 prom_debug(" 1) *acknowledge = 0x%lx\n", *acknowledge
);
2030 prom_debug(" 1) secondary_hold = 0x%lx\n", secondary_hold
);
2032 /* Set the common spinloop variable, so all of the secondary cpus
2033 * will block when they are awakened from their OF spinloop.
2034 * This must occur for both SMP and non SMP kernels, since OF will
2035 * be trashed when we move the kernel.
2040 for (node
= 0; prom_next_node(&node
); ) {
2041 unsigned int cpu_no
;
2045 prom_getprop(node
, "device_type", type
, sizeof(type
));
2046 if (prom_strcmp(type
, "cpu") != 0)
2049 /* Skip non-configured cpus. */
2050 if (prom_getprop(node
, "status", type
, sizeof(type
)) > 0)
2051 if (prom_strcmp(type
, "okay") != 0)
2054 reg
= cpu_to_be32(-1); /* make sparse happy */
2055 prom_getprop(node
, "reg", ®
, sizeof(reg
));
2056 cpu_no
= be32_to_cpu(reg
);
2058 prom_debug("cpu hw idx = %u\n", cpu_no
);
2060 /* Init the acknowledge var which will be reset by
2061 * the secondary cpu when it awakens from its OF
2064 *acknowledge
= (unsigned long)-1;
2066 if (cpu_no
!= prom
.cpu
) {
2067 /* Primary Thread of non-boot cpu or any thread */
2068 prom_printf("starting cpu hw idx %u... ", cpu_no
);
2069 call_prom("start-cpu", 3, 0, node
,
2070 secondary_hold
, cpu_no
);
2072 for (i
= 0; (i
< 100000000) &&
2073 (*acknowledge
== ((unsigned long)-1)); i
++ )
2076 if (*acknowledge
== cpu_no
)
2077 prom_printf("done\n");
2079 prom_printf("failed: %lx\n", *acknowledge
);
2083 prom_printf("boot cpu hw idx %u\n", cpu_no
);
2084 #endif /* CONFIG_SMP */
2087 prom_debug("prom_hold_cpus: end...\n");
2091 static void __init
prom_init_client_services(unsigned long pp
)
2093 /* Get a handle to the prom entry point before anything else */
2096 /* get a handle for the stdout device */
2097 prom
.chosen
= call_prom("finddevice", 1, 1, ADDR("/chosen"));
2098 if (!PHANDLE_VALID(prom
.chosen
))
2099 prom_panic("cannot find chosen"); /* msg won't be printed :( */
2101 /* get device tree root */
2102 prom
.root
= call_prom("finddevice", 1, 1, ADDR("/"));
2103 if (!PHANDLE_VALID(prom
.root
))
2104 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
2111 * For really old powermacs, we need to map things we claim.
2112 * For that, we need the ihandle of the mmu.
2113 * Also, on the longtrail, we need to work around other bugs.
2115 static void __init
prom_find_mmu(void)
2120 oprom
= call_prom("finddevice", 1, 1, ADDR("/openprom"));
2121 if (!PHANDLE_VALID(oprom
))
2123 if (prom_getprop(oprom
, "model", version
, sizeof(version
)) <= 0)
2125 version
[sizeof(version
) - 1] = 0;
2126 /* XXX might need to add other versions here */
2127 if (prom_strcmp(version
, "Open Firmware, 1.0.5") == 0)
2128 of_workarounds
= OF_WA_CLAIM
;
2129 else if (prom_strncmp(version
, "FirmWorks,3.", 12) == 0) {
2130 of_workarounds
= OF_WA_CLAIM
| OF_WA_LONGTRAIL
;
2131 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
2134 prom
.memory
= call_prom("open", 1, 1, ADDR("/memory"));
2135 prom_getprop(prom
.chosen
, "mmu", &prom
.mmumap
,
2136 sizeof(prom
.mmumap
));
2137 prom
.mmumap
= be32_to_cpu(prom
.mmumap
);
2138 if (!IHANDLE_VALID(prom
.memory
) || !IHANDLE_VALID(prom
.mmumap
))
2139 of_workarounds
&= ~OF_WA_CLAIM
; /* hmmm */
2142 #define prom_find_mmu()
2145 static void __init
prom_init_stdout(void)
2147 char *path
= of_stdout_device
;
2149 phandle stdout_node
;
2152 if (prom_getprop(prom
.chosen
, "stdout", &val
, sizeof(val
)) <= 0)
2153 prom_panic("cannot find stdout");
2155 prom
.stdout
= be32_to_cpu(val
);
2157 /* Get the full OF pathname of the stdout device */
2158 memset(path
, 0, 256);
2159 call_prom("instance-to-path", 3, 1, prom
.stdout
, path
, 255);
2160 prom_printf("OF stdout device is: %s\n", of_stdout_device
);
2161 prom_setprop(prom
.chosen
, "/chosen", "linux,stdout-path",
2162 path
, prom_strlen(path
) + 1);
2164 /* instance-to-package fails on PA-Semi */
2165 stdout_node
= call_prom("instance-to-package", 1, 1, prom
.stdout
);
2166 if (stdout_node
!= PROM_ERROR
) {
2167 val
= cpu_to_be32(stdout_node
);
2169 /* If it's a display, note it */
2170 memset(type
, 0, sizeof(type
));
2171 prom_getprop(stdout_node
, "device_type", type
, sizeof(type
));
2172 if (prom_strcmp(type
, "display") == 0)
2173 prom_setprop(stdout_node
, path
, "linux,boot-display", NULL
, 0);
2177 static int __init
prom_find_machine_type(void)
2186 /* Look for a PowerMac or a Cell */
2187 len
= prom_getprop(prom
.root
, "compatible",
2188 compat
, sizeof(compat
)-1);
2192 char *p
= &compat
[i
];
2193 int sl
= prom_strlen(p
);
2196 if (prom_strstr(p
, "Power Macintosh") ||
2197 prom_strstr(p
, "MacRISC"))
2198 return PLATFORM_POWERMAC
;
2200 /* We must make sure we don't detect the IBM Cell
2201 * blades as pSeries due to some firmware issues,
2204 if (prom_strstr(p
, "IBM,CBEA") ||
2205 prom_strstr(p
, "IBM,CPBW-1.0"))
2206 return PLATFORM_GENERIC
;
2207 #endif /* CONFIG_PPC64 */
2212 /* Try to figure out if it's an IBM pSeries or any other
2213 * PAPR compliant platform. We assume it is if :
2214 * - /device_type is "chrp" (please, do NOT use that for future
2218 len
= prom_getprop(prom
.root
, "device_type",
2219 compat
, sizeof(compat
)-1);
2221 return PLATFORM_GENERIC
;
2222 if (prom_strcmp(compat
, "chrp"))
2223 return PLATFORM_GENERIC
;
2225 /* Default to pSeries. We need to know if we are running LPAR */
2226 rtas
= call_prom("finddevice", 1, 1, ADDR("/rtas"));
2227 if (!PHANDLE_VALID(rtas
))
2228 return PLATFORM_GENERIC
;
2229 x
= prom_getproplen(rtas
, "ibm,hypertas-functions");
2230 if (x
!= PROM_ERROR
) {
2231 prom_debug("Hypertas detected, assuming LPAR !\n");
2232 return PLATFORM_PSERIES_LPAR
;
2234 return PLATFORM_PSERIES
;
2236 return PLATFORM_GENERIC
;
2240 static int __init
prom_set_color(ihandle ih
, int i
, int r
, int g
, int b
)
2242 return call_prom("call-method", 6, 1, ADDR("color!"), ih
, i
, b
, g
, r
);
2246 * If we have a display that we don't know how to drive,
2247 * we will want to try to execute OF's open method for it
2248 * later. However, OF will probably fall over if we do that
2249 * we've taken over the MMU.
2250 * So we check whether we will need to open the display,
2251 * and if so, open it now.
2253 static void __init
prom_check_displays(void)
2255 char type
[16], *path
;
2260 static const unsigned char default_colors
[] __initconst
= {
2278 const unsigned char *clut
;
2280 prom_debug("Looking for displays\n");
2281 for (node
= 0; prom_next_node(&node
); ) {
2282 memset(type
, 0, sizeof(type
));
2283 prom_getprop(node
, "device_type", type
, sizeof(type
));
2284 if (prom_strcmp(type
, "display") != 0)
2287 /* It seems OF doesn't null-terminate the path :-( */
2288 path
= prom_scratch
;
2289 memset(path
, 0, sizeof(prom_scratch
));
2292 * leave some room at the end of the path for appending extra
2295 if (call_prom("package-to-path", 3, 1, node
, path
,
2296 sizeof(prom_scratch
) - 10) == PROM_ERROR
)
2298 prom_printf("found display : %s, opening... ", path
);
2300 ih
= call_prom("open", 1, 1, path
);
2302 prom_printf("failed\n");
2307 prom_printf("done\n");
2308 prom_setprop(node
, path
, "linux,opened", NULL
, 0);
2310 /* Setup a usable color table when the appropriate
2311 * method is available. Should update this to set-colors */
2312 clut
= default_colors
;
2313 for (i
= 0; i
< 16; i
++, clut
+= 3)
2314 if (prom_set_color(ih
, i
, clut
[0], clut
[1],
2318 #ifdef CONFIG_LOGO_LINUX_CLUT224
2319 clut
= PTRRELOC(logo_linux_clut224
.clut
);
2320 for (i
= 0; i
< logo_linux_clut224
.clutsize
; i
++, clut
+= 3)
2321 if (prom_set_color(ih
, i
+ 32, clut
[0], clut
[1],
2324 #endif /* CONFIG_LOGO_LINUX_CLUT224 */
2326 #ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
2327 if (prom_getprop(node
, "linux,boot-display", NULL
, 0) !=
2329 u32 width
, height
, pitch
, addr
;
2331 prom_printf("Setting btext !\n");
2332 prom_getprop(node
, "width", &width
, 4);
2333 prom_getprop(node
, "height", &height
, 4);
2334 prom_getprop(node
, "linebytes", &pitch
, 4);
2335 prom_getprop(node
, "address", &addr
, 4);
2336 prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
2337 width
, height
, pitch
, addr
);
2338 btext_setup_display(width
, height
, 8, pitch
, addr
);
2340 #endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
2345 /* Return (relocated) pointer to this much memory: moves initrd if reqd. */
2346 static void __init
*make_room(unsigned long *mem_start
, unsigned long *mem_end
,
2347 unsigned long needed
, unsigned long align
)
2351 *mem_start
= _ALIGN(*mem_start
, align
);
2352 while ((*mem_start
+ needed
) > *mem_end
) {
2353 unsigned long room
, chunk
;
2355 prom_debug("Chunk exhausted, claiming more at %lx...\n",
2357 room
= alloc_top
- alloc_bottom
;
2358 if (room
> DEVTREE_CHUNK_SIZE
)
2359 room
= DEVTREE_CHUNK_SIZE
;
2360 if (room
< PAGE_SIZE
)
2361 prom_panic("No memory for flatten_device_tree "
2363 chunk
= alloc_up(room
, 0);
2365 prom_panic("No memory for flatten_device_tree "
2366 "(claim failed)\n");
2367 *mem_end
= chunk
+ room
;
2370 ret
= (void *)*mem_start
;
2371 *mem_start
+= needed
;
2376 #define dt_push_token(token, mem_start, mem_end) do { \
2377 void *room = make_room(mem_start, mem_end, 4, 4); \
2378 *(__be32 *)room = cpu_to_be32(token); \
2381 static unsigned long __init
dt_find_string(char *str
)
2385 s
= os
= (char *)dt_string_start
;
2387 while (s
< (char *)dt_string_end
) {
2388 if (prom_strcmp(s
, str
) == 0)
2390 s
+= prom_strlen(s
) + 1;
2396 * The Open Firmware 1275 specification states properties must be 31 bytes or
2397 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
2399 #define MAX_PROPERTY_NAME 64
2401 static void __init
scan_dt_build_strings(phandle node
,
2402 unsigned long *mem_start
,
2403 unsigned long *mem_end
)
2405 char *prev_name
, *namep
, *sstart
;
2409 sstart
= (char *)dt_string_start
;
2411 /* get and store all property names */
2414 /* 64 is max len of name including nul. */
2415 namep
= make_room(mem_start
, mem_end
, MAX_PROPERTY_NAME
, 1);
2416 if (call_prom("nextprop", 3, 1, node
, prev_name
, namep
) != 1) {
2417 /* No more nodes: unwind alloc */
2418 *mem_start
= (unsigned long)namep
;
2423 if (prom_strcmp(namep
, "name") == 0) {
2424 *mem_start
= (unsigned long)namep
;
2428 /* get/create string entry */
2429 soff
= dt_find_string(namep
);
2431 *mem_start
= (unsigned long)namep
;
2432 namep
= sstart
+ soff
;
2434 /* Trim off some if we can */
2435 *mem_start
= (unsigned long)namep
+ prom_strlen(namep
) + 1;
2436 dt_string_end
= *mem_start
;
2441 /* do all our children */
2442 child
= call_prom("child", 1, 1, node
);
2443 while (child
!= 0) {
2444 scan_dt_build_strings(child
, mem_start
, mem_end
);
2445 child
= call_prom("peer", 1, 1, child
);
2449 static void __init
scan_dt_build_struct(phandle node
, unsigned long *mem_start
,
2450 unsigned long *mem_end
)
2453 char *namep
, *prev_name
, *sstart
, *p
, *ep
, *lp
, *path
;
2455 unsigned char *valp
;
2456 static char pname
[MAX_PROPERTY_NAME
] __prombss
;
2457 int l
, room
, has_phandle
= 0;
2459 dt_push_token(OF_DT_BEGIN_NODE
, mem_start
, mem_end
);
2461 /* get the node's full name */
2462 namep
= (char *)*mem_start
;
2463 room
= *mem_end
- *mem_start
;
2466 l
= call_prom("package-to-path", 3, 1, node
, namep
, room
);
2468 /* Didn't fit? Get more room. */
2470 if (l
>= *mem_end
- *mem_start
)
2471 namep
= make_room(mem_start
, mem_end
, l
+1, 1);
2472 call_prom("package-to-path", 3, 1, node
, namep
, l
);
2476 /* Fixup an Apple bug where they have bogus \0 chars in the
2477 * middle of the path in some properties, and extract
2478 * the unit name (everything after the last '/').
2480 for (lp
= p
= namep
, ep
= namep
+ l
; p
< ep
; p
++) {
2487 *mem_start
= _ALIGN((unsigned long)lp
+ 1, 4);
2490 /* get it again for debugging */
2491 path
= prom_scratch
;
2492 memset(path
, 0, sizeof(prom_scratch
));
2493 call_prom("package-to-path", 3, 1, node
, path
, sizeof(prom_scratch
) - 1);
2495 /* get and store all properties */
2497 sstart
= (char *)dt_string_start
;
2499 if (call_prom("nextprop", 3, 1, node
, prev_name
,
2504 if (prom_strcmp(pname
, "name") == 0) {
2509 /* find string offset */
2510 soff
= dt_find_string(pname
);
2512 prom_printf("WARNING: Can't find string index for"
2513 " <%s>, node %s\n", pname
, path
);
2516 prev_name
= sstart
+ soff
;
2519 l
= call_prom("getproplen", 2, 1, node
, pname
);
2522 if (l
== PROM_ERROR
)
2525 /* push property head */
2526 dt_push_token(OF_DT_PROP
, mem_start
, mem_end
);
2527 dt_push_token(l
, mem_start
, mem_end
);
2528 dt_push_token(soff
, mem_start
, mem_end
);
2530 /* push property content */
2531 valp
= make_room(mem_start
, mem_end
, l
, 4);
2532 call_prom("getprop", 4, 1, node
, pname
, valp
, l
);
2533 *mem_start
= _ALIGN(*mem_start
, 4);
2535 if (!prom_strcmp(pname
, "phandle"))
2539 /* Add a "phandle" property if none already exist */
2541 soff
= dt_find_string("phandle");
2543 prom_printf("WARNING: Can't find string index for <phandle> node %s\n", path
);
2545 dt_push_token(OF_DT_PROP
, mem_start
, mem_end
);
2546 dt_push_token(4, mem_start
, mem_end
);
2547 dt_push_token(soff
, mem_start
, mem_end
);
2548 valp
= make_room(mem_start
, mem_end
, 4, 4);
2549 *(__be32
*)valp
= cpu_to_be32(node
);
2553 /* do all our children */
2554 child
= call_prom("child", 1, 1, node
);
2555 while (child
!= 0) {
2556 scan_dt_build_struct(child
, mem_start
, mem_end
);
2557 child
= call_prom("peer", 1, 1, child
);
2560 dt_push_token(OF_DT_END_NODE
, mem_start
, mem_end
);
2563 static void __init
flatten_device_tree(void)
2566 unsigned long mem_start
, mem_end
, room
;
2567 struct boot_param_header
*hdr
;
2572 * Check how much room we have between alloc top & bottom (+/- a
2573 * few pages), crop to 1MB, as this is our "chunk" size
2575 room
= alloc_top
- alloc_bottom
- 0x4000;
2576 if (room
> DEVTREE_CHUNK_SIZE
)
2577 room
= DEVTREE_CHUNK_SIZE
;
2578 prom_debug("starting device tree allocs at %lx\n", alloc_bottom
);
2580 /* Now try to claim that */
2581 mem_start
= (unsigned long)alloc_up(room
, PAGE_SIZE
);
2583 prom_panic("Can't allocate initial device-tree chunk\n");
2584 mem_end
= mem_start
+ room
;
2586 /* Get root of tree */
2587 root
= call_prom("peer", 1, 1, (phandle
)0);
2588 if (root
== (phandle
)0)
2589 prom_panic ("couldn't get device tree root\n");
2591 /* Build header and make room for mem rsv map */
2592 mem_start
= _ALIGN(mem_start
, 4);
2593 hdr
= make_room(&mem_start
, &mem_end
,
2594 sizeof(struct boot_param_header
), 4);
2595 dt_header_start
= (unsigned long)hdr
;
2596 rsvmap
= make_room(&mem_start
, &mem_end
, sizeof(mem_reserve_map
), 8);
2598 /* Start of strings */
2599 mem_start
= PAGE_ALIGN(mem_start
);
2600 dt_string_start
= mem_start
;
2601 mem_start
+= 4; /* hole */
2603 /* Add "phandle" in there, we'll need it */
2604 namep
= make_room(&mem_start
, &mem_end
, 16, 1);
2605 prom_strcpy(namep
, "phandle");
2606 mem_start
= (unsigned long)namep
+ prom_strlen(namep
) + 1;
2608 /* Build string array */
2609 prom_printf("Building dt strings...\n");
2610 scan_dt_build_strings(root
, &mem_start
, &mem_end
);
2611 dt_string_end
= mem_start
;
2613 /* Build structure */
2614 mem_start
= PAGE_ALIGN(mem_start
);
2615 dt_struct_start
= mem_start
;
2616 prom_printf("Building dt structure...\n");
2617 scan_dt_build_struct(root
, &mem_start
, &mem_end
);
2618 dt_push_token(OF_DT_END
, &mem_start
, &mem_end
);
2619 dt_struct_end
= PAGE_ALIGN(mem_start
);
2622 hdr
->boot_cpuid_phys
= cpu_to_be32(prom
.cpu
);
2623 hdr
->magic
= cpu_to_be32(OF_DT_HEADER
);
2624 hdr
->totalsize
= cpu_to_be32(dt_struct_end
- dt_header_start
);
2625 hdr
->off_dt_struct
= cpu_to_be32(dt_struct_start
- dt_header_start
);
2626 hdr
->off_dt_strings
= cpu_to_be32(dt_string_start
- dt_header_start
);
2627 hdr
->dt_strings_size
= cpu_to_be32(dt_string_end
- dt_string_start
);
2628 hdr
->off_mem_rsvmap
= cpu_to_be32(((unsigned long)rsvmap
) - dt_header_start
);
2629 hdr
->version
= cpu_to_be32(OF_DT_VERSION
);
2630 /* Version 16 is not backward compatible */
2631 hdr
->last_comp_version
= cpu_to_be32(0x10);
2633 /* Copy the reserve map in */
2634 memcpy(rsvmap
, mem_reserve_map
, sizeof(mem_reserve_map
));
2639 prom_printf("reserved memory map:\n");
2640 for (i
= 0; i
< mem_reserve_cnt
; i
++)
2641 prom_printf(" %llx - %llx\n",
2642 be64_to_cpu(mem_reserve_map
[i
].base
),
2643 be64_to_cpu(mem_reserve_map
[i
].size
));
2646 /* Bump mem_reserve_cnt to cause further reservations to fail
2647 * since it's too late.
2649 mem_reserve_cnt
= MEM_RESERVE_MAP_SIZE
;
2651 prom_printf("Device tree strings 0x%lx -> 0x%lx\n",
2652 dt_string_start
, dt_string_end
);
2653 prom_printf("Device tree struct 0x%lx -> 0x%lx\n",
2654 dt_struct_start
, dt_struct_end
);
2657 #ifdef CONFIG_PPC_MAPLE
2658 /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2659 * The values are bad, and it doesn't even have the right number of cells. */
2660 static void __init
fixup_device_tree_maple(void)
2663 u32 rloc
= 0x01002000; /* IO space; PCI device = 4 */
2667 name
= "/ht@0/isa@4";
2668 isa
= call_prom("finddevice", 1, 1, ADDR(name
));
2669 if (!PHANDLE_VALID(isa
)) {
2670 name
= "/ht@0/isa@6";
2671 isa
= call_prom("finddevice", 1, 1, ADDR(name
));
2672 rloc
= 0x01003000; /* IO space; PCI device = 6 */
2674 if (!PHANDLE_VALID(isa
))
2677 if (prom_getproplen(isa
, "ranges") != 12)
2679 if (prom_getprop(isa
, "ranges", isa_ranges
, sizeof(isa_ranges
))
2683 if (isa_ranges
[0] != 0x1 ||
2684 isa_ranges
[1] != 0xf4000000 ||
2685 isa_ranges
[2] != 0x00010000)
2688 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
2690 isa_ranges
[0] = 0x1;
2691 isa_ranges
[1] = 0x0;
2692 isa_ranges
[2] = rloc
;
2693 isa_ranges
[3] = 0x0;
2694 isa_ranges
[4] = 0x0;
2695 isa_ranges
[5] = 0x00010000;
2696 prom_setprop(isa
, name
, "ranges",
2697 isa_ranges
, sizeof(isa_ranges
));
2700 #define CPC925_MC_START 0xf8000000
2701 #define CPC925_MC_LENGTH 0x1000000
2702 /* The values for memory-controller don't have right number of cells */
2703 static void __init
fixup_device_tree_maple_memory_controller(void)
2707 char *name
= "/hostbridge@f8000000";
2710 mc
= call_prom("finddevice", 1, 1, ADDR(name
));
2711 if (!PHANDLE_VALID(mc
))
2714 if (prom_getproplen(mc
, "reg") != 8)
2717 prom_getprop(prom
.root
, "#address-cells", &ac
, sizeof(ac
));
2718 prom_getprop(prom
.root
, "#size-cells", &sc
, sizeof(sc
));
2719 if ((ac
!= 2) || (sc
!= 2))
2722 if (prom_getprop(mc
, "reg", mc_reg
, sizeof(mc_reg
)) == PROM_ERROR
)
2725 if (mc_reg
[0] != CPC925_MC_START
|| mc_reg
[1] != CPC925_MC_LENGTH
)
2728 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2731 mc_reg
[1] = CPC925_MC_START
;
2733 mc_reg
[3] = CPC925_MC_LENGTH
;
2734 prom_setprop(mc
, name
, "reg", mc_reg
, sizeof(mc_reg
));
2737 #define fixup_device_tree_maple()
2738 #define fixup_device_tree_maple_memory_controller()
2741 #ifdef CONFIG_PPC_CHRP
2743 * Pegasos and BriQ lacks the "ranges" property in the isa node
2744 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2745 * Pegasos has the IDE configured in legacy mode, but advertised as native
2747 static void __init
fixup_device_tree_chrp(void)
2751 u32 rloc
= 0x01006000; /* IO space; PCI device = 12 */
2755 name
= "/pci@80000000/isa@c";
2756 ph
= call_prom("finddevice", 1, 1, ADDR(name
));
2757 if (!PHANDLE_VALID(ph
)) {
2758 name
= "/pci@ff500000/isa@6";
2759 ph
= call_prom("finddevice", 1, 1, ADDR(name
));
2760 rloc
= 0x01003000; /* IO space; PCI device = 6 */
2762 if (PHANDLE_VALID(ph
)) {
2763 rc
= prom_getproplen(ph
, "ranges");
2764 if (rc
== 0 || rc
== PROM_ERROR
) {
2765 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2772 prop
[5] = 0x00010000;
2773 prom_setprop(ph
, name
, "ranges", prop
, sizeof(prop
));
2777 name
= "/pci@80000000/ide@C,1";
2778 ph
= call_prom("finddevice", 1, 1, ADDR(name
));
2779 if (PHANDLE_VALID(ph
)) {
2780 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2783 prom_setprop(ph
, name
, "interrupts", prop
, 2*sizeof(u32
));
2784 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2785 rc
= prom_getprop(ph
, "class-code", prop
, sizeof(u32
));
2786 if (rc
== sizeof(u32
)) {
2788 prom_setprop(ph
, name
, "class-code", prop
, sizeof(u32
));
2793 #define fixup_device_tree_chrp()
2796 #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2797 static void __init
fixup_device_tree_pmac(void)
2799 phandle u3
, i2c
, mpic
;
2804 /* Some G5s have a missing interrupt definition, fix it up here */
2805 u3
= call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2806 if (!PHANDLE_VALID(u3
))
2808 i2c
= call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2809 if (!PHANDLE_VALID(i2c
))
2811 mpic
= call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2812 if (!PHANDLE_VALID(mpic
))
2815 /* check if proper rev of u3 */
2816 if (prom_getprop(u3
, "device-rev", &u3_rev
, sizeof(u3_rev
))
2819 if (u3_rev
< 0x35 || u3_rev
> 0x39)
2821 /* does it need fixup ? */
2822 if (prom_getproplen(i2c
, "interrupts") > 0)
2825 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2827 /* interrupt on this revision of u3 is number 0 and level */
2830 prom_setprop(i2c
, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2831 &interrupts
, sizeof(interrupts
));
2833 prom_setprop(i2c
, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2834 &parent
, sizeof(parent
));
2837 #define fixup_device_tree_pmac()
2840 #ifdef CONFIG_PPC_EFIKA
2842 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2843 * to talk to the phy. If the phy-handle property is missing, then this
2844 * function is called to add the appropriate nodes and link it to the
2847 static void __init
fixup_device_tree_efika_add_phy(void)
2853 /* Check if /builtin/ethernet exists - bail if it doesn't */
2854 node
= call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2855 if (!PHANDLE_VALID(node
))
2858 /* Check if the phy-handle property exists - bail if it does */
2859 rv
= prom_getprop(node
, "phy-handle", prop
, sizeof(prop
));
2864 * At this point the ethernet device doesn't have a phy described.
2865 * Now we need to add the missing phy node and linkage
2868 /* Check for an MDIO bus node - if missing then create one */
2869 node
= call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
2870 if (!PHANDLE_VALID(node
)) {
2871 prom_printf("Adding Ethernet MDIO node\n");
2872 call_prom("interpret", 1, 1,
2873 " s\" /builtin\" find-device"
2875 " 1 encode-int s\" #address-cells\" property"
2876 " 0 encode-int s\" #size-cells\" property"
2877 " s\" mdio\" device-name"
2878 " s\" fsl,mpc5200b-mdio\" encode-string"
2879 " s\" compatible\" property"
2880 " 0xf0003000 0x400 reg"
2882 " 0x5 encode-int encode+"
2883 " 0x3 encode-int encode+"
2884 " s\" interrupts\" property"
2888 /* Check for a PHY device node - if missing then create one and
2889 * give it's phandle to the ethernet node */
2890 node
= call_prom("finddevice", 1, 1,
2891 ADDR("/builtin/mdio/ethernet-phy"));
2892 if (!PHANDLE_VALID(node
)) {
2893 prom_printf("Adding Ethernet PHY node\n");
2894 call_prom("interpret", 1, 1,
2895 " s\" /builtin/mdio\" find-device"
2897 " s\" ethernet-phy\" device-name"
2898 " 0x10 encode-int s\" reg\" property"
2902 " s\" /builtin/ethernet\" find-device"
2904 " s\" phy-handle\" property"
2909 static void __init
fixup_device_tree_efika(void)
2911 int sound_irq
[3] = { 2, 2, 0 };
2912 int bcomm_irq
[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
2913 3,4,0, 3,5,0, 3,6,0, 3,7,0,
2914 3,8,0, 3,9,0, 3,10,0, 3,11,0,
2915 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
2920 /* Check if we're really running on a EFIKA */
2921 node
= call_prom("finddevice", 1, 1, ADDR("/"));
2922 if (!PHANDLE_VALID(node
))
2925 rv
= prom_getprop(node
, "model", prop
, sizeof(prop
));
2926 if (rv
== PROM_ERROR
)
2928 if (prom_strcmp(prop
, "EFIKA5K2"))
2931 prom_printf("Applying EFIKA device tree fixups\n");
2933 /* Claiming to be 'chrp' is death */
2934 node
= call_prom("finddevice", 1, 1, ADDR("/"));
2935 rv
= prom_getprop(node
, "device_type", prop
, sizeof(prop
));
2936 if (rv
!= PROM_ERROR
&& (prom_strcmp(prop
, "chrp") == 0))
2937 prom_setprop(node
, "/", "device_type", "efika", sizeof("efika"));
2939 /* CODEGEN,description is exposed in /proc/cpuinfo so
2941 rv
= prom_getprop(node
, "CODEGEN,description", prop
, sizeof(prop
));
2942 if (rv
!= PROM_ERROR
&& (prom_strstr(prop
, "CHRP")))
2943 prom_setprop(node
, "/", "CODEGEN,description",
2944 "Efika 5200B PowerPC System",
2945 sizeof("Efika 5200B PowerPC System"));
2947 /* Fixup bestcomm interrupts property */
2948 node
= call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
2949 if (PHANDLE_VALID(node
)) {
2950 len
= prom_getproplen(node
, "interrupts");
2952 prom_printf("Fixing bestcomm interrupts property\n");
2953 prom_setprop(node
, "/builtin/bestcom", "interrupts",
2954 bcomm_irq
, sizeof(bcomm_irq
));
2958 /* Fixup sound interrupts property */
2959 node
= call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
2960 if (PHANDLE_VALID(node
)) {
2961 rv
= prom_getprop(node
, "interrupts", prop
, sizeof(prop
));
2962 if (rv
== PROM_ERROR
) {
2963 prom_printf("Adding sound interrupts property\n");
2964 prom_setprop(node
, "/builtin/sound", "interrupts",
2965 sound_irq
, sizeof(sound_irq
));
2969 /* Make sure ethernet phy-handle property exists */
2970 fixup_device_tree_efika_add_phy();
2973 #define fixup_device_tree_efika()
2976 #ifdef CONFIG_PPC_PASEMI_NEMO
2978 * CFE supplied on Nemo is broken in several ways, biggest
2979 * problem is that it reassigns ISA interrupts to unused mpic ints.
2980 * Add an interrupt-controller property for the io-bridge to use
2981 * and correct the ints so we can attach them to an irq_domain
2983 static void __init
fixup_device_tree_pasemi(void)
2985 u32 interrupts
[2], parent
, rval
, val
= 0;
2986 char *name
, *pci_name
;
2989 /* Find the root pci node */
2990 name
= "/pxp@0,e0000000";
2991 iob
= call_prom("finddevice", 1, 1, ADDR(name
));
2992 if (!PHANDLE_VALID(iob
))
2995 /* check if interrupt-controller node set yet */
2996 if (prom_getproplen(iob
, "interrupt-controller") !=PROM_ERROR
)
2999 prom_printf("adding interrupt-controller property for SB600...\n");
3001 prom_setprop(iob
, name
, "interrupt-controller", &val
, 0);
3003 pci_name
= "/pxp@0,e0000000/pci@11";
3004 node
= call_prom("finddevice", 1, 1, ADDR(pci_name
));
3007 for( ; prom_next_node(&node
); ) {
3008 /* scan each node for one with an interrupt */
3009 if (!PHANDLE_VALID(node
))
3012 rval
= prom_getproplen(node
, "interrupts");
3013 if (rval
== 0 || rval
== PROM_ERROR
)
3016 prom_getprop(node
, "interrupts", &interrupts
, sizeof(interrupts
));
3017 if ((interrupts
[0] < 212) || (interrupts
[0] > 222))
3020 /* found a node, update both interrupts and interrupt-parent */
3021 if ((interrupts
[0] >= 212) && (interrupts
[0] <= 215))
3022 interrupts
[0] -= 203;
3023 if ((interrupts
[0] >= 216) && (interrupts
[0] <= 220))
3024 interrupts
[0] -= 213;
3025 if (interrupts
[0] == 221)
3027 if (interrupts
[0] == 222)
3030 prom_setprop(node
, pci_name
, "interrupts", interrupts
,
3031 sizeof(interrupts
));
3032 prom_setprop(node
, pci_name
, "interrupt-parent", &parent
,
3037 * The io-bridge has device_type set to 'io-bridge' change it to 'isa'
3038 * so that generic isa-bridge code can add the SB600 and its on-board
3041 name
= "/pxp@0,e0000000/io-bridge@0";
3042 iob
= call_prom("finddevice", 1, 1, ADDR(name
));
3043 if (!PHANDLE_VALID(iob
))
3046 /* device_type is already set, just change it. */
3048 prom_printf("Changing device_type of SB600 node...\n");
3050 prom_setprop(iob
, name
, "device_type", "isa", sizeof("isa"));
3052 #else /* !CONFIG_PPC_PASEMI_NEMO */
3053 static inline void fixup_device_tree_pasemi(void) { }
3056 static void __init
fixup_device_tree(void)
3058 fixup_device_tree_maple();
3059 fixup_device_tree_maple_memory_controller();
3060 fixup_device_tree_chrp();
3061 fixup_device_tree_pmac();
3062 fixup_device_tree_efika();
3063 fixup_device_tree_pasemi();
3066 static void __init
prom_find_boot_cpu(void)
3073 if (prom_getprop(prom
.chosen
, "cpu", &rval
, sizeof(rval
)) <= 0)
3075 prom_cpu
= be32_to_cpu(rval
);
3077 cpu_pkg
= call_prom("instance-to-package", 1, 1, prom_cpu
);
3079 if (!PHANDLE_VALID(cpu_pkg
))
3082 prom_getprop(cpu_pkg
, "reg", &rval
, sizeof(rval
));
3083 prom
.cpu
= be32_to_cpu(rval
);
3085 prom_debug("Booting CPU hw index = %d\n", prom
.cpu
);
3088 static void __init
prom_check_initrd(unsigned long r3
, unsigned long r4
)
3090 #ifdef CONFIG_BLK_DEV_INITRD
3091 if (r3
&& r4
&& r4
!= 0xdeadbeef) {
3094 prom_initrd_start
= is_kernel_addr(r3
) ? __pa(r3
) : r3
;
3095 prom_initrd_end
= prom_initrd_start
+ r4
;
3097 val
= cpu_to_be64(prom_initrd_start
);
3098 prom_setprop(prom
.chosen
, "/chosen", "linux,initrd-start",
3100 val
= cpu_to_be64(prom_initrd_end
);
3101 prom_setprop(prom
.chosen
, "/chosen", "linux,initrd-end",
3104 reserve_mem(prom_initrd_start
,
3105 prom_initrd_end
- prom_initrd_start
);
3107 prom_debug("initrd_start=0x%lx\n", prom_initrd_start
);
3108 prom_debug("initrd_end=0x%lx\n", prom_initrd_end
);
3110 #endif /* CONFIG_BLK_DEV_INITRD */
3114 #ifdef CONFIG_RELOCATABLE
3115 static void reloc_toc(void)
3119 static void unreloc_toc(void)
3123 static void __reloc_toc(unsigned long offset
, unsigned long nr_entries
)
3126 unsigned long *toc_entry
;
3128 /* Get the start of the TOC by using r2 directly. */
3129 asm volatile("addi %0,2,-0x8000" : "=b" (toc_entry
));
3131 for (i
= 0; i
< nr_entries
; i
++) {
3132 *toc_entry
= *toc_entry
+ offset
;
3137 static void reloc_toc(void)
3139 unsigned long offset
= reloc_offset();
3140 unsigned long nr_entries
=
3141 (__prom_init_toc_end
- __prom_init_toc_start
) / sizeof(long);
3143 __reloc_toc(offset
, nr_entries
);
3148 static void unreloc_toc(void)
3150 unsigned long offset
= reloc_offset();
3151 unsigned long nr_entries
=
3152 (__prom_init_toc_end
- __prom_init_toc_start
) / sizeof(long);
3156 __reloc_toc(-offset
, nr_entries
);
3162 * We enter here early on, when the Open Firmware prom is still
3163 * handling exceptions and the MMU hash table for us.
3166 unsigned long __init
prom_init(unsigned long r3
, unsigned long r4
,
3168 unsigned long r6
, unsigned long r7
,
3169 unsigned long kbase
)
3174 unsigned long offset
= reloc_offset();
3181 * First zero the BSS
3183 memset(&__bss_start
, 0, __bss_stop
- __bss_start
);
3186 * Init interface to Open Firmware, get some node references,
3189 prom_init_client_services(pp
);
3192 * See if this OF is old enough that we need to do explicit maps
3193 * and other workarounds
3198 * Init prom stdout device
3202 prom_printf("Preparing to boot %s", linux_banner
);
3205 * Get default machine type. At this point, we do not differentiate
3206 * between pSeries SMP and pSeries LPAR
3208 of_platform
= prom_find_machine_type();
3209 prom_printf("Detected machine type: %x\n", of_platform
);
3211 #ifndef CONFIG_NONSTATIC_KERNEL
3212 /* Bail if this is a kdump kernel. */
3213 if (PHYSICAL_START
> 0)
3214 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
3218 * Check for an initrd
3220 prom_check_initrd(r3
, r4
);
3223 * Do early parsing of command line
3225 early_cmdline_parse();
3227 #ifdef CONFIG_PPC_PSERIES
3229 * On pSeries, inform the firmware about our capabilities
3231 if (of_platform
== PLATFORM_PSERIES
||
3232 of_platform
== PLATFORM_PSERIES_LPAR
)
3233 prom_send_capabilities();
3237 * Copy the CPU hold code
3239 if (of_platform
!= PLATFORM_POWERMAC
)
3240 copy_and_flush(0, kbase
, 0x100, 0);
3243 * Initialize memory management within prom_init
3248 * Determine which cpu is actually running right _now_
3250 prom_find_boot_cpu();
3253 * Initialize display devices
3255 prom_check_displays();
3257 #if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
3259 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
3260 * that uses the allocator, we need to make sure we get the top of memory
3261 * available for us here...
3263 if (of_platform
== PLATFORM_PSERIES
)
3264 prom_initialize_tce_table();
3268 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
3269 * have a usable RTAS implementation.
3271 if (of_platform
!= PLATFORM_POWERMAC
)
3272 prom_instantiate_rtas();
3275 /* instantiate sml */
3276 prom_instantiate_sml();
3280 * On non-powermacs, put all CPUs in spin-loops.
3282 * PowerMacs use a different mechanism to spin CPUs
3284 * (This must be done after instanciating RTAS)
3286 if (of_platform
!= PLATFORM_POWERMAC
)
3290 * Fill in some infos for use by the kernel later on
3292 if (prom_memory_limit
) {
3293 __be64 val
= cpu_to_be64(prom_memory_limit
);
3294 prom_setprop(prom
.chosen
, "/chosen", "linux,memory-limit",
3299 prom_setprop(prom
.chosen
, "/chosen", "linux,iommu-off",
3302 if (prom_iommu_force_on
)
3303 prom_setprop(prom
.chosen
, "/chosen", "linux,iommu-force-on",
3306 if (prom_tce_alloc_start
) {
3307 prom_setprop(prom
.chosen
, "/chosen", "linux,tce-alloc-start",
3308 &prom_tce_alloc_start
,
3309 sizeof(prom_tce_alloc_start
));
3310 prom_setprop(prom
.chosen
, "/chosen", "linux,tce-alloc-end",
3311 &prom_tce_alloc_end
,
3312 sizeof(prom_tce_alloc_end
));
3317 * Fixup any known bugs in the device-tree
3319 fixup_device_tree();
3322 * Now finally create the flattened device-tree
3324 prom_printf("copying OF device tree...\n");
3325 flatten_device_tree();
3328 * in case stdin is USB and still active on IBM machines...
3329 * Unfortunately quiesce crashes on some powermacs if we have
3330 * closed stdin already (in particular the powerbook 101).
3332 if (of_platform
!= PLATFORM_POWERMAC
)
3336 * Call OF "quiesce" method to shut down pending DMA's from
3339 prom_printf("Quiescing Open Firmware ...\n");
3340 call_prom("quiesce", 0, 0);
3343 * And finally, call the kernel passing it the flattened device
3344 * tree and NULL as r5, thus triggering the new entry point which
3345 * is common to us and kexec
3347 hdr
= dt_header_start
;
3349 /* Don't print anything after quiesce under OPAL, it crashes OFW */
3350 prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase
);
3351 prom_debug("->dt_header_start=0x%lx\n", hdr
);
3354 reloc_got2(-offset
);
3359 __start(hdr
, kbase
, 0, 0, 0, 0, 0);