3 * Common boot and setup code.
5 * Copyright (C) 2001 PPC64 Team, IBM Corp
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
15 #include <linux/config.h>
16 #include <linux/module.h>
17 #include <linux/string.h>
18 #include <linux/sched.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/reboot.h>
22 #include <linux/delay.h>
23 #include <linux/initrd.h>
24 #include <linux/ide.h>
25 #include <linux/seq_file.h>
26 #include <linux/ioport.h>
27 #include <linux/console.h>
28 #include <linux/utsname.h>
29 #include <linux/tty.h>
30 #include <linux/root_dev.h>
31 #include <linux/notifier.h>
32 #include <linux/cpu.h>
33 #include <linux/unistd.h>
34 #include <linux/serial.h>
35 #include <linux/serial_8250.h>
38 #include <asm/processor.h>
39 #include <asm/pgtable.h>
40 #include <asm/bootinfo.h>
43 #include <asm/machdep.h>
45 #include <asm/ppcdebug.h>
47 #include <asm/cputable.h>
48 #include <asm/sections.h>
49 #include <asm/btext.h>
50 #include <asm/nvram.h>
51 #include <asm/setup.h>
52 #include <asm/system.h>
54 #include <asm/iommu.h>
55 #include <asm/serial.h>
56 #include <asm/cache.h>
60 #include <asm/iSeries/ItLpNaca.h>
61 #include <asm/firmware.h>
62 #include <asm/systemcfg.h>
65 #define DBG(fmt...) udbg_printf(fmt)
71 * Here are some early debugging facilities. You can enable one
72 * but your kernel will not boot on anything else if you do so
75 /* This one is for use on LPAR machines that support an HVC console
78 extern void udbg_init_debug_lpar(void);
79 /* This one is for use on Apple G5 machines
81 extern void udbg_init_pmac_realmode(void);
82 /* That's RTAS panel debug */
83 extern void call_rtas_display_status_delay(unsigned char c
);
84 /* Here's maple real mode debug */
85 extern void udbg_init_maple_realmode(void);
87 #define EARLY_DEBUG_INIT() do {} while(0)
90 #define EARLY_DEBUG_INIT() udbg_init_debug_lpar()
91 #define EARLY_DEBUG_INIT() udbg_init_maple_realmode()
92 #define EARLY_DEBUG_INIT() udbg_init_pmac_realmode()
93 #define EARLY_DEBUG_INIT() \
94 do { udbg_putc = call_rtas_display_status_delay; } while(0)
97 /* extern void *stab; */
98 extern unsigned long klimit
;
100 extern void mm_init_ppc64(void);
101 extern void stab_initialize(unsigned long stab
);
102 extern void htab_initialize(void);
103 extern void early_init_devtree(void *flat_dt
);
104 extern void unflatten_device_tree(void);
106 extern void smp_release_cpus(void);
110 int boot_cpuid_phys
= 0;
114 struct ppc64_caches ppc64_caches
;
115 EXPORT_SYMBOL_GPL(ppc64_caches
);
118 * These are used in binfmt_elf.c to put aux entries on the stack
119 * for each elf executable being started.
125 /* The main machine-dep calls structure
127 struct machdep_calls ppc_md
;
128 EXPORT_SYMBOL(ppc_md
);
130 #ifdef CONFIG_MAGIC_SYSRQ
131 unsigned long SYSRQ_KEY
;
132 #endif /* CONFIG_MAGIC_SYSRQ */
135 static int ppc64_panic_event(struct notifier_block
*, unsigned long, void *);
136 static struct notifier_block ppc64_panic_block
= {
137 .notifier_call
= ppc64_panic_event
,
138 .priority
= INT_MIN
/* may not return; must be done last */
142 * Perhaps we can put the pmac screen_info[] here
143 * on pmac as well so we don't need the ifdef's.
144 * Until we get multiple-console support in here
146 * Maybe tie it to serial consoles, since this is really what
147 * these processors use on existing boards. -- Dan
149 struct screen_info screen_info
= {
152 .orig_video_cols
= 80,
153 .orig_video_lines
= 25,
154 .orig_video_isVGA
= 1,
155 .orig_video_points
= 16
160 static int smt_enabled_cmdline
;
162 /* Look for ibm,smt-enabled OF option */
163 static void check_smt_enabled(void)
165 struct device_node
*dn
;
168 /* Allow the command line to overrule the OF option */
169 if (smt_enabled_cmdline
)
172 dn
= of_find_node_by_path("/options");
175 smt_option
= (char *)get_property(dn
, "ibm,smt-enabled", NULL
);
178 if (!strcmp(smt_option
, "on"))
179 smt_enabled_at_boot
= 1;
180 else if (!strcmp(smt_option
, "off"))
181 smt_enabled_at_boot
= 0;
186 /* Look for smt-enabled= cmdline option */
187 static int __init
early_smt_enabled(char *p
)
189 smt_enabled_cmdline
= 1;
194 if (!strcmp(p
, "on") || !strcmp(p
, "1"))
195 smt_enabled_at_boot
= 1;
196 else if (!strcmp(p
, "off") || !strcmp(p
, "0"))
197 smt_enabled_at_boot
= 0;
201 early_param("smt-enabled", early_smt_enabled
);
204 * setup_cpu_maps - initialize the following cpu maps:
209 * Having the possible map set up early allows us to restrict allocations
210 * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
212 * We do not initialize the online map here; cpus set their own bits in
213 * cpu_online_map as they come up.
215 * This function is valid only for Open Firmware systems. finish_device_tree
216 * must be called before using this.
218 * While we're here, we may as well set the "physical" cpu ids in the paca.
220 static void __init
setup_cpu_maps(void)
222 struct device_node
*dn
= NULL
;
228 while ((dn
= of_find_node_by_type(dn
, "cpu")) && cpu
< NR_CPUS
) {
230 int j
, len
= sizeof(u32
), nthreads
;
232 intserv
= (u32
*)get_property(dn
, "ibm,ppc-interrupt-server#s",
235 intserv
= (u32
*)get_property(dn
, "reg", NULL
);
237 nthreads
= len
/ sizeof(u32
);
239 for (j
= 0; j
< nthreads
&& cpu
< NR_CPUS
; j
++) {
240 cpu_set(cpu
, cpu_present_map
);
241 set_hard_smp_processor_id(cpu
, intserv
[j
]);
243 if (intserv
[j
] == boot_cpuid_phys
)
245 cpu_set(cpu
, cpu_possible_map
);
250 /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
251 * boot cpu is logical 0.
253 if (boot_cpuid_phys
!= get_hard_smp_processor_id(0)) {
255 tmp
= get_hard_smp_processor_id(0);
256 set_hard_smp_processor_id(0, boot_cpuid_phys
);
257 set_hard_smp_processor_id(swap_cpuid
, tmp
);
261 * On pSeries LPAR, we need to know how many cpus
262 * could possibly be added to this partition.
264 if (systemcfg
->platform
== PLATFORM_PSERIES_LPAR
&&
265 (dn
= of_find_node_by_path("/rtas"))) {
266 int num_addr_cell
, num_size_cell
, maxcpus
;
269 num_addr_cell
= prom_n_addr_cells(dn
);
270 num_size_cell
= prom_n_size_cells(dn
);
272 ireg
= (unsigned int *)
273 get_property(dn
, "ibm,lrdr-capacity", NULL
);
278 maxcpus
= ireg
[num_addr_cell
+ num_size_cell
];
280 /* Double maxcpus for processors which have SMT capability */
281 if (cpu_has_feature(CPU_FTR_SMT
))
284 if (maxcpus
> NR_CPUS
) {
286 "Partition configured for %d cpus, "
287 "operating system maximum is %d.\n",
291 printk(KERN_INFO
"Partition configured for %d cpus.\n",
294 for (cpu
= 0; cpu
< maxcpus
; cpu
++)
295 cpu_set(cpu
, cpu_possible_map
);
301 * Do the sibling map; assume only two threads per processor.
304 cpu_set(cpu
, cpu_sibling_map
[cpu
]);
305 if (cpu_has_feature(CPU_FTR_SMT
))
306 cpu_set(cpu
^ 0x1, cpu_sibling_map
[cpu
]);
309 systemcfg
->processorCount
= num_present_cpus();
311 #endif /* CONFIG_SMP */
313 extern struct machdep_calls pSeries_md
;
314 extern struct machdep_calls pmac_md
;
315 extern struct machdep_calls maple_md
;
316 extern struct machdep_calls bpa_md
;
317 extern struct machdep_calls iseries_md
;
319 /* Ultimately, stuff them in an elf section like initcalls... */
320 static struct machdep_calls __initdata
*machines
[] = {
321 #ifdef CONFIG_PPC_PSERIES
323 #endif /* CONFIG_PPC_PSERIES */
324 #ifdef CONFIG_PPC_PMAC
326 #endif /* CONFIG_PPC_PMAC */
327 #ifdef CONFIG_PPC_MAPLE
329 #endif /* CONFIG_PPC_MAPLE */
330 #ifdef CONFIG_PPC_BPA
333 #ifdef CONFIG_PPC_ISERIES
340 * Early initialization entry point. This is called by head.S
341 * with MMU translation disabled. We rely on the "feature" of
342 * the CPU that ignores the top 2 bits of the address in real
343 * mode so we can access kernel globals normally provided we
344 * only toy with things in the RMO region. From here, we do
345 * some early parsing of the device-tree to setup out LMB
346 * data structures, and allocate & initialize the hash table
347 * and segment tables so we can start running with translation
350 * It is this function which will call the probe() callback of
351 * the various platform types and copy the matching one to the
352 * global ppc_md structure. Your platform can eventually do
353 * some very early initializations from the probe() routine, but
354 * this is not recommended, be very careful as, for example, the
355 * device-tree is not accessible via normal means at this point.
358 void __init
early_setup(unsigned long dt_ptr
)
360 struct paca_struct
*lpaca
= get_paca();
361 static struct machdep_calls
**mach
;
364 * Enable early debugging if any specified (see top of
369 DBG(" -> early_setup()\n");
372 * Fill the default DBG level (do we want to keep
373 * that old mecanism around forever ?)
378 * Do early initializations using the flattened device
379 * tree, like retreiving the physical memory map or
380 * calculating/retreiving the hash table size
382 early_init_devtree(__va(dt_ptr
));
385 * Iterate all ppc_md structures until we find the proper
386 * one for the current machine type
388 DBG("Probing machine type for platform %x...\n",
389 systemcfg
->platform
);
391 for (mach
= machines
; *mach
; mach
++) {
392 if ((*mach
)->probe(systemcfg
->platform
))
395 /* What can we do if we didn't find ? */
397 DBG("No suitable machine found !\n");
402 DBG("Found, Initializing memory management...\n");
405 * Initialize stab / SLB management
407 if (!firmware_has_feature(FW_FEATURE_ISERIES
))
408 stab_initialize(lpaca
->stab_real
);
411 * Initialize the MMU Hash table and create the linear mapping
416 DBG(" <- early_setup()\n");
421 * Initialize some remaining members of the ppc64_caches and systemcfg structures
422 * (at least until we get rid of them completely). This is mostly some
423 * cache informations about the CPU that will be used by cache flush
424 * routines and/or provided to userland
426 static void __init
initialize_cache_info(void)
428 struct device_node
*np
;
429 unsigned long num_cpus
= 0;
431 DBG(" -> initialize_cache_info()\n");
433 for (np
= NULL
; (np
= of_find_node_by_type(np
, "cpu"));) {
436 /* We're assuming *all* of the CPUs have the same
437 * d-cache and i-cache sizes... -Peter
440 if ( num_cpus
== 1 ) {
445 /* Then read cache informations */
446 if (systemcfg
->platform
== PLATFORM_POWERMAC
) {
447 dc
= "d-cache-block-size";
448 ic
= "i-cache-block-size";
450 dc
= "d-cache-line-size";
451 ic
= "i-cache-line-size";
455 lsize
= cur_cpu_spec
->dcache_bsize
;
456 sizep
= (u32
*)get_property(np
, "d-cache-size", NULL
);
459 lsizep
= (u32
*) get_property(np
, dc
, NULL
);
462 if (sizep
== 0 || lsizep
== 0)
463 DBG("Argh, can't find dcache properties ! "
464 "sizep: %p, lsizep: %p\n", sizep
, lsizep
);
466 systemcfg
->dcache_size
= ppc64_caches
.dsize
= size
;
467 systemcfg
->dcache_line_size
=
468 ppc64_caches
.dline_size
= lsize
;
469 ppc64_caches
.log_dline_size
= __ilog2(lsize
);
470 ppc64_caches
.dlines_per_page
= PAGE_SIZE
/ lsize
;
473 lsize
= cur_cpu_spec
->icache_bsize
;
474 sizep
= (u32
*)get_property(np
, "i-cache-size", NULL
);
477 lsizep
= (u32
*)get_property(np
, ic
, NULL
);
480 if (sizep
== 0 || lsizep
== 0)
481 DBG("Argh, can't find icache properties ! "
482 "sizep: %p, lsizep: %p\n", sizep
, lsizep
);
484 systemcfg
->icache_size
= ppc64_caches
.isize
= size
;
485 systemcfg
->icache_line_size
=
486 ppc64_caches
.iline_size
= lsize
;
487 ppc64_caches
.log_iline_size
= __ilog2(lsize
);
488 ppc64_caches
.ilines_per_page
= PAGE_SIZE
/ lsize
;
492 /* Add an eye catcher and the systemcfg layout version number */
493 strcpy(systemcfg
->eye_catcher
, "SYSTEMCFG:PPC64");
494 systemcfg
->version
.major
= SYSTEMCFG_MAJOR
;
495 systemcfg
->version
.minor
= SYSTEMCFG_MINOR
;
496 systemcfg
->processor
= mfspr(SPRN_PVR
);
498 DBG(" <- initialize_cache_info()\n");
501 static void __init
check_for_initrd(void)
503 #ifdef CONFIG_BLK_DEV_INITRD
506 DBG(" -> check_for_initrd()\n");
509 prop
= (u64
*)get_property(of_chosen
,
510 "linux,initrd-start", NULL
);
512 initrd_start
= (unsigned long)__va(*prop
);
513 prop
= (u64
*)get_property(of_chosen
,
514 "linux,initrd-end", NULL
);
516 initrd_end
= (unsigned long)__va(*prop
);
517 initrd_below_start_ok
= 1;
523 /* If we were passed an initrd, set the ROOT_DEV properly if the values
524 * look sensible. If not, clear initrd reference.
526 if (initrd_start
>= KERNELBASE
&& initrd_end
>= KERNELBASE
&&
527 initrd_end
> initrd_start
)
528 ROOT_DEV
= Root_RAM0
;
530 initrd_start
= initrd_end
= 0;
533 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start
, initrd_end
);
535 DBG(" <- check_for_initrd()\n");
536 #endif /* CONFIG_BLK_DEV_INITRD */
540 * Do some initial setup of the system. The parameters are those which
541 * were passed in from the bootloader.
543 void __init
setup_system(void)
545 DBG(" -> setup_system()\n");
548 * Unflatten the device-tree passed by prom_init or kexec
550 unflatten_device_tree();
553 * Fill the ppc64_caches & systemcfg structures with informations
554 * retreived from the device-tree. Need to be called before
555 * finish_device_tree() since the later requires some of the
556 * informations filled up here to properly parse the interrupt
558 * It also sets up the cache line sizes which allows to call
559 * routines like flush_icache_range (used by the hash init
562 initialize_cache_info();
564 #ifdef CONFIG_PPC_RTAS
566 * Initialize RTAS if available
569 #endif /* CONFIG_PPC_RTAS */
570 printk("%s:%d rtas.dev=%p (@ %p)\n", __FILE__
, __LINE__
, rtas
.dev
,
574 * Check if we have an initrd provided via the device-tree
577 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
580 * Do some platform specific early initializations, that includes
581 * setting up the hash table pointers. It also sets up some interrupt-mapping
582 * related options that will be used by finish_device_tree()
585 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
588 * "Finish" the device-tree, that is do the actual parsing of
589 * some of the properties like the interrupt map
591 finish_device_tree();
592 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
597 #ifdef CONFIG_XMON_DEFAULT
600 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
602 * Register early console
604 register_early_udbg_console();
605 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
607 /* Save unparsed command line copy for /proc/cmdline */
608 strlcpy(saved_command_line
, cmd_line
, COMMAND_LINE_SIZE
);
611 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
615 * iSeries has already initialized the cpu maps at this point.
618 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
620 /* Release secondary cpus out of their spinloops at 0x60 now that
621 * we can map physical -> logical CPU ids
624 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
627 printk("Starting Linux PPC64 %s\n", system_utsname
.version
);
629 printk("-----------------------------------------------------\n");
630 printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size
);
631 printk("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch
);
632 printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller
);
633 printk("systemcfg = 0x%p\n", systemcfg
);
634 printk("systemcfg->platform = 0x%x\n", systemcfg
->platform
);
635 printk("systemcfg->processorCount = 0x%lx\n", systemcfg
->processorCount
);
636 printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg
->physicalMemorySize
);
637 printk("ppc64_caches.dcache_line_size = 0x%x\n",
638 ppc64_caches
.dline_size
);
639 printk("ppc64_caches.icache_line_size = 0x%x\n",
640 ppc64_caches
.iline_size
);
641 printk("htab_address = 0x%p\n", htab_address
);
642 printk("htab_hash_mask = 0x%lx\n", htab_hash_mask
);
643 printk("-----------------------------------------------------\n");
644 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
647 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
649 DBG(" <- setup_system()\n");
652 /* also used by kexec */
653 void machine_shutdown(void)
655 if (ppc_md
.nvram_sync
)
659 void machine_restart(char *cmd
)
666 printk(KERN_EMERG
"System Halted, OK to turn off power\n");
671 void machine_power_off(void)
678 printk(KERN_EMERG
"System Halted, OK to turn off power\n");
682 /* Used by the G5 thermal driver */
683 EXPORT_SYMBOL_GPL(machine_power_off
);
685 void machine_halt(void)
692 printk(KERN_EMERG
"System Halted, OK to turn off power\n");
697 static int ppc64_panic_event(struct notifier_block
*this,
698 unsigned long event
, void *ptr
)
700 ppc_md
.panic((char *)ptr
); /* May not return */
706 DEFINE_PER_CPU(unsigned int, pvr
);
709 static int show_cpuinfo(struct seq_file
*m
, void *v
)
711 unsigned long cpu_id
= (unsigned long)v
- 1;
716 if (cpu_id
== NR_CPUS
) {
717 seq_printf(m
, "timebase\t: %lu\n", ppc_tb_freq
);
719 if (ppc_md
.get_cpuinfo
!= NULL
)
720 ppc_md
.get_cpuinfo(m
);
725 /* We only show online cpus: disable preempt (overzealous, I
726 * knew) to prevent cpu going down. */
728 if (!cpu_online(cpu_id
)) {
734 pvr
= per_cpu(pvr
, cpu_id
);
736 pvr
= mfspr(SPRN_PVR
);
738 maj
= (pvr
>> 8) & 0xFF;
741 seq_printf(m
, "processor\t: %lu\n", cpu_id
);
742 seq_printf(m
, "cpu\t\t: ");
744 if (cur_cpu_spec
->pvr_mask
)
745 seq_printf(m
, "%s", cur_cpu_spec
->cpu_name
);
747 seq_printf(m
, "unknown (%08x)", pvr
);
749 #ifdef CONFIG_ALTIVEC
750 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
751 seq_printf(m
, ", altivec supported");
752 #endif /* CONFIG_ALTIVEC */
757 * Assume here that all clock rates are the same in a
758 * smp system. -- Cort
760 seq_printf(m
, "clock\t\t: %lu.%06luMHz\n", ppc_proc_freq
/ 1000000,
761 ppc_proc_freq
% 1000000);
763 seq_printf(m
, "revision\t: %hd.%hd\n\n", maj
, min
);
769 static void *c_start(struct seq_file
*m
, loff_t
*pos
)
771 return *pos
<= NR_CPUS
? (void *)((*pos
)+1) : NULL
;
773 static void *c_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
776 return c_start(m
, pos
);
778 static void c_stop(struct seq_file
*m
, void *v
)
781 struct seq_operations cpuinfo_op
= {
785 .show
= show_cpuinfo
,
789 * These three variables are used to save values passed to us by prom_init()
790 * via the device tree. The TCE variables are needed because with a memory_limit
791 * in force we may need to explicitly map the TCE are at the top of RAM.
793 unsigned long memory_limit
;
794 unsigned long tce_alloc_start
;
795 unsigned long tce_alloc_end
;
797 #ifdef CONFIG_PPC_ISERIES
799 * On iSeries we just parse the mem=X option from the command line.
800 * On pSeries it's a bit more complicated, see prom_init_mem()
802 static int __init
early_parsemem(char *p
)
807 memory_limit
= ALIGN(memparse(p
, &p
), PAGE_SIZE
);
811 early_param("mem", early_parsemem
);
812 #endif /* CONFIG_PPC_ISERIES */
814 #ifdef CONFIG_PPC_MULTIPLATFORM
815 static int __init
set_preferred_console(void)
817 struct device_node
*prom_stdout
= NULL
;
822 DBG(" -> set_preferred_console()\n");
824 /* The user has requested a console so this is already set up. */
825 if (strstr(saved_command_line
, "console=")) {
826 DBG(" console was specified !\n");
831 DBG(" of_chosen is NULL !\n");
834 /* We are getting a weird phandle from OF ... */
835 /* ... So use the full path instead */
836 name
= (char *)get_property(of_chosen
, "linux,stdout-path", NULL
);
838 DBG(" no linux,stdout-path !\n");
841 prom_stdout
= of_find_node_by_path(name
);
843 DBG(" can't find stdout package %s !\n", name
);
846 DBG("stdout is %s\n", prom_stdout
->full_name
);
848 name
= (char *)get_property(prom_stdout
, "name", NULL
);
850 DBG(" stdout package has no name !\n");
853 spd
= (u32
*)get_property(prom_stdout
, "current-speed", NULL
);
857 #ifdef CONFIG_SERIAL_8250_CONSOLE
858 else if (strcmp(name
, "serial") == 0) {
860 u32
*reg
= (u32
*)get_property(prom_stdout
, "reg", &i
);
876 /* We dont recognise the serial port */
881 #endif /* CONFIG_SERIAL_8250_CONSOLE */
882 #ifdef CONFIG_PPC_PSERIES
883 else if (strcmp(name
, "vty") == 0) {
884 u32
*reg
= (u32
*)get_property(prom_stdout
, "reg", NULL
);
885 char *compat
= (char *)get_property(prom_stdout
, "compatible", NULL
);
887 if (reg
&& compat
&& (strcmp(compat
, "hvterm-protocol") == 0)) {
888 /* Host Virtual Serial Interface */
900 of_node_put(prom_stdout
);
901 DBG("Found hvsi console at offset %d\n", offset
);
902 return add_preferred_console("hvsi", offset
, NULL
);
904 /* pSeries LPAR virtual console */
905 of_node_put(prom_stdout
);
906 DBG("Found hvc console\n");
907 return add_preferred_console("hvc", 0, NULL
);
910 #endif /* CONFIG_PPC_PSERIES */
911 #ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
912 else if (strcmp(name
, "ch-a") == 0)
914 else if (strcmp(name
, "ch-b") == 0)
916 #endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
919 of_node_put(prom_stdout
);
921 DBG("Found serial console at ttyS%d\n", offset
);
924 static char __initdata opt
[16];
925 sprintf(opt
, "%d", *spd
);
926 return add_preferred_console("ttyS", offset
, opt
);
928 return add_preferred_console("ttyS", offset
, NULL
);
931 DBG("No preferred console found !\n");
932 of_node_put(prom_stdout
);
935 console_initcall(set_preferred_console
);
936 #endif /* CONFIG_PPC_MULTIPLATFORM */
938 #ifdef CONFIG_IRQSTACKS
939 static void __init
irqstack_early_init(void)
944 * interrupt stacks must be under 256MB, we cannot afford to take
945 * SLB misses on them.
948 softirq_ctx
[i
] = (struct thread_info
*)__va(lmb_alloc_base(THREAD_SIZE
,
949 THREAD_SIZE
, 0x10000000));
950 hardirq_ctx
[i
] = (struct thread_info
*)__va(lmb_alloc_base(THREAD_SIZE
,
951 THREAD_SIZE
, 0x10000000));
955 #define irqstack_early_init()
959 * Stack space used when we detect a bad kernel stack pointer, and
960 * early in SMP boots before relocation is enabled.
962 static void __init
emergency_stack_init(void)
968 * Emergency stacks must be under 256MB, we cannot afford to take
969 * SLB misses on them. The ABI also requires them to be 128-byte
972 * Since we use these as temporary stacks during secondary CPU
973 * bringup, we need to get at them in real mode. This means they
974 * must also be within the RMO region.
976 limit
= min(0x10000000UL
, lmb
.rmo_size
);
979 paca
[i
].emergency_sp
= __va(lmb_alloc_base(PAGE_SIZE
, 128,
984 * Called from setup_arch to initialize the bitmap of available
985 * syscalls in the systemcfg page
987 void __init
setup_syscall_map(void)
989 unsigned int i
, count64
= 0, count32
= 0;
990 extern unsigned long *sys_call_table
;
991 extern unsigned long sys_ni_syscall
;
994 for (i
= 0; i
< __NR_syscalls
; i
++) {
995 if (sys_call_table
[i
*2] != sys_ni_syscall
) {
997 systemcfg
->syscall_map_64
[i
>> 5] |=
998 0x80000000UL
>> (i
& 0x1f);
1000 if (sys_call_table
[i
*2+1] != sys_ni_syscall
) {
1002 systemcfg
->syscall_map_32
[i
>> 5] |=
1003 0x80000000UL
>> (i
& 0x1f);
1006 printk(KERN_INFO
"Syscall map setup, %d 32-bit and %d 64-bit syscalls\n",
1011 * Called into from start_kernel, after lock_kernel has been called.
1012 * Initializes bootmem, which is unsed to manage page allocation until
1013 * mem_init is called.
1015 void __init
setup_arch(char **cmdline_p
)
1017 extern void do_init_bootmem(void);
1019 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
1020 ppc64_boot_msg(0x12, "Setup Arch");
1022 *cmdline_p
= cmd_line
;
1025 * Set cache line size based on type of cpu as a default.
1026 * Systems with OF can look in the properties on the cpu node(s)
1027 * for a possibly more accurate value.
1029 dcache_bsize
= ppc64_caches
.dline_size
;
1030 icache_bsize
= ppc64_caches
.iline_size
;
1032 /* reboot on panic */
1033 panic_timeout
= 180;
1034 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
1037 notifier_chain_register(&panic_notifier_list
, &ppc64_panic_block
);
1039 init_mm
.start_code
= PAGE_OFFSET
;
1040 init_mm
.end_code
= (unsigned long) _etext
;
1041 init_mm
.end_data
= (unsigned long) _edata
;
1042 init_mm
.brk
= klimit
;
1044 irqstack_early_init();
1045 emergency_stack_init();
1047 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
1050 /* set up the bootmem stuff with available memory */
1054 printk("%s:%d rtas.dev=%p\n", __FILE__
, __LINE__
, rtas
.dev
);
1055 /* initialize the syscall map in systemcfg */
1056 setup_syscall_map();
1058 ppc_md
.setup_arch();
1060 /* Use the default idle loop if the platform hasn't provided one. */
1061 if (NULL
== ppc_md
.idle_loop
) {
1062 ppc_md
.idle_loop
= default_idle
;
1063 printk(KERN_INFO
"Using default idle loop\n");
1067 ppc64_boot_msg(0x15, "Setup Done");
1071 /* ToDo: do something useful if ppc_md is not yet setup. */
1072 #define PPC64_LINUX_FUNCTION 0x0f000000
1073 #define PPC64_IPL_MESSAGE 0xc0000000
1074 #define PPC64_TERM_MESSAGE 0xb0000000
1076 static void ppc64_do_msg(unsigned int src
, const char *msg
)
1078 if (ppc_md
.progress
) {
1081 sprintf(buf
, "%08X\n", src
);
1082 ppc_md
.progress(buf
, 0);
1083 snprintf(buf
, 128, "%s", msg
);
1084 ppc_md
.progress(buf
, 0);
1088 /* Print a boot progress message. */
1089 void ppc64_boot_msg(unsigned int src
, const char *msg
)
1091 ppc64_do_msg(PPC64_LINUX_FUNCTION
|PPC64_IPL_MESSAGE
|src
, msg
);
1092 printk("[boot]%04x %s\n", src
, msg
);
1095 /* Print a termination message (print only -- does not stop the kernel) */
1096 void ppc64_terminate_msg(unsigned int src
, const char *msg
)
1098 ppc64_do_msg(PPC64_LINUX_FUNCTION
|PPC64_TERM_MESSAGE
|src
, msg
);
1099 printk("[terminate]%04x %s\n", src
, msg
);
1102 /* This should only be called on processor 0 during calibrate decr */
1103 void __init
setup_default_decr(void)
1105 struct paca_struct
*lpaca
= get_paca();
1107 lpaca
->default_decr
= tb_ticks_per_jiffy
;
1108 lpaca
->next_jiffy_update_tb
= get_tb() + tb_ticks_per_jiffy
;
1111 #ifndef CONFIG_PPC_ISERIES
1113 * This function can be used by platforms to "find" legacy serial ports.
1114 * It works for "serial" nodes under an "isa" node, and will try to
1115 * respect the "ibm,aix-loc" property if any. It works with up to 8
1119 #define MAX_LEGACY_SERIAL_PORTS 8
1120 static struct plat_serial8250_port serial_ports
[MAX_LEGACY_SERIAL_PORTS
+1];
1121 static unsigned int old_serial_count
;
1123 void __init
generic_find_legacy_serial_ports(u64
*physport
,
1124 unsigned int *default_speed
)
1126 struct device_node
*np
;
1129 struct isa_reg_property
{
1134 struct pci_reg_property
{
1135 struct pci_address addr
;
1140 DBG(" -> generic_find_legacy_serial_port()\n");
1146 np
= of_find_node_by_path("/");
1150 /* First fill our array */
1151 for (np
= NULL
; (np
= of_find_node_by_type(np
, "serial"));) {
1152 struct device_node
*isa
, *pci
;
1153 struct isa_reg_property
*reg
;
1154 unsigned long phys_size
, addr_size
, io_base
;
1156 u32
*interrupts
, *clk
, *spd
;
1158 int index
, rlen
, rentsize
;
1160 /* Ok, first check if it's under an "isa" parent */
1161 isa
= of_get_parent(np
);
1162 if (!isa
|| strcmp(isa
->name
, "isa")) {
1163 DBG("%s: no isa parent found\n", np
->full_name
);
1167 /* Now look for an "ibm,aix-loc" property that gives us ordering
1170 typep
= (char *)get_property(np
, "ibm,aix-loc", NULL
);
1172 /* Get the ISA port number */
1173 reg
= (struct isa_reg_property
*)get_property(np
, "reg", NULL
);
1176 /* We assume the interrupt number isn't translated ... */
1177 interrupts
= (u32
*)get_property(np
, "interrupts", NULL
);
1178 /* get clock freq. if present */
1179 clk
= (u32
*)get_property(np
, "clock-frequency", NULL
);
1180 /* get default speed if present */
1181 spd
= (u32
*)get_property(np
, "current-speed", NULL
);
1182 /* Default to locate at end of array */
1183 index
= old_serial_count
; /* end of the array by default */
1185 /* If we have a location index, then use it */
1186 if (typep
&& *typep
== 'S') {
1187 index
= simple_strtol(typep
+1, NULL
, 0) - 1;
1188 /* if index is out of range, use end of array instead */
1189 if (index
>= MAX_LEGACY_SERIAL_PORTS
)
1190 index
= old_serial_count
;
1191 /* if our index is still out of range, that mean that
1192 * array is full, we could scan for a free slot but that
1193 * make little sense to bother, just skip the port
1195 if (index
>= MAX_LEGACY_SERIAL_PORTS
)
1197 if (index
>= old_serial_count
)
1198 old_serial_count
= index
+ 1;
1199 /* Check if there is a port who already claimed our slot */
1200 if (serial_ports
[index
].iobase
!= 0) {
1201 /* if we still have some room, move it, else override */
1202 if (old_serial_count
< MAX_LEGACY_SERIAL_PORTS
) {
1203 DBG("Moved legacy port %d -> %d\n", index
,
1205 serial_ports
[old_serial_count
++] =
1206 serial_ports
[index
];
1208 DBG("Replacing legacy port %d\n", index
);
1212 if (index
>= MAX_LEGACY_SERIAL_PORTS
)
1214 if (index
>= old_serial_count
)
1215 old_serial_count
= index
+ 1;
1217 /* Now fill the entry */
1218 memset(&serial_ports
[index
], 0, sizeof(struct plat_serial8250_port
));
1219 serial_ports
[index
].uartclk
= clk
? *clk
: BASE_BAUD
* 16;
1220 serial_ports
[index
].iobase
= reg
->address
;
1221 serial_ports
[index
].irq
= interrupts
? interrupts
[0] : 0;
1222 serial_ports
[index
].flags
= ASYNC_BOOT_AUTOCONF
;
1224 DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n",
1226 serial_ports
[index
].iobase
,
1227 serial_ports
[index
].irq
,
1228 serial_ports
[index
].uartclk
);
1230 /* Get phys address of IO reg for port 1 */
1234 pci
= of_get_parent(isa
);
1236 DBG("%s: no pci parent found\n", np
->full_name
);
1240 rangesp
= (u32
*)get_property(pci
, "ranges", &rlen
);
1241 if (rangesp
== NULL
) {
1247 /* we need the #size-cells of the PCI bridge node itself */
1249 sizeprop
= (u32
*)get_property(pci
, "#size-cells", NULL
);
1250 if (sizeprop
!= NULL
)
1251 phys_size
= *sizeprop
;
1252 /* we need the parent #addr-cells */
1253 addr_size
= prom_n_addr_cells(pci
);
1254 rentsize
= 3 + addr_size
+ phys_size
;
1256 for (;rlen
>= rentsize
; rlen
-= rentsize
,rangesp
+= rentsize
) {
1257 if (((rangesp
[0] >> 24) & 0x3) != 1)
1258 continue; /* not IO space */
1259 io_base
= rangesp
[3];
1261 io_base
= (io_base
<< 32) | rangesp
[4];
1264 *physport
= io_base
+ reg
->address
;
1265 if (default_speed
&& spd
)
1266 *default_speed
= *spd
;
1273 DBG(" <- generic_find_legacy_serial_port()\n");
1276 static struct platform_device serial_device
= {
1277 .name
= "serial8250",
1278 .id
= PLAT8250_DEV_PLATFORM
,
1280 .platform_data
= serial_ports
,
1284 static int __init
serial_dev_init(void)
1286 return platform_device_register(&serial_device
);
1288 arch_initcall(serial_dev_init
);
1290 #endif /* CONFIG_PPC_ISERIES */
1292 int check_legacy_ioport(unsigned long base_port
)
1294 if (ppc_md
.check_legacy_ioport
== NULL
)
1296 return ppc_md
.check_legacy_ioport(base_port
);
1298 EXPORT_SYMBOL(check_legacy_ioport
);
1301 static int __init
early_xmon(char *p
)
1303 /* ensure xmon is enabled */
1305 if (strncmp(p
, "on", 2) == 0)
1307 if (strncmp(p
, "off", 3) == 0)
1309 if (strncmp(p
, "early", 5) != 0)
1317 early_param("xmon", early_xmon
);