1 /* $Id: setup.c,v 1.30 2003/10/13 07:21:19 lethal Exp $
3 * linux/arch/sh/kernel/setup.c
5 * Copyright (C) 1999 Niibe Yutaka
6 * Copyright (C) 2002, 2003 Paul Mundt
10 * This file handles the architecture-dependent parts of initialization
13 #include <linux/tty.h>
14 #include <linux/ioport.h>
15 #include <linux/init.h>
16 #include <linux/initrd.h>
17 #include <linux/bootmem.h>
18 #include <linux/console.h>
19 #include <linux/seq_file.h>
20 #include <linux/root_dev.h>
21 #include <linux/utsname.h>
22 #include <linux/cpu.h>
23 #include <asm/uaccess.h>
25 #include <asm/sections.h>
27 #include <asm/setup.h>
28 #include <asm/clock.h>
32 static int kgdb_parse_options(char *options
);
34 extern void * __rd_start
, * __rd_end
;
40 * Initialize loops_per_jiffy as 10000000 (1000MIPS).
41 * This value will be used at the very early stage of serial setup.
42 * The bigger value means no problem.
44 struct sh_cpuinfo boot_cpu_data
= { CPU_SH_NONE
, 10000000, };
45 struct screen_info screen_info
;
47 #if defined(CONFIG_SH_UNKNOWN)
48 struct sh_machine_vector sh_mv
;
51 /* We need this to satisfy some external references. */
52 struct screen_info screen_info
= {
53 0, 25, /* orig-x, orig-y */
55 0, /* orig-video-page */
56 0, /* orig-video-mode */
57 80, /* orig-video-cols */
58 0,0,0, /* ega_ax, ega_bx, ega_cx */
59 25, /* orig-video-lines */
60 0, /* orig-video-isVGA */
61 16 /* orig-video-points */
64 extern void platform_setup(void);
65 extern char *get_system_type(void);
66 extern int root_mountflags
;
68 #define MV_NAME_SIZE 32
70 static struct sh_machine_vector
* __init
get_mv_byname(const char* name
);
73 * This is set up by the setup-routine at boot-time
75 #define PARAM ((unsigned char *)empty_zero_page)
77 #define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))
78 #define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004))
79 #define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008))
80 #define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c))
81 #define INITRD_START (*(unsigned long *) (PARAM+0x010))
82 #define INITRD_SIZE (*(unsigned long *) (PARAM+0x014))
84 #define COMMAND_LINE ((char *) (PARAM+0x100))
86 #define RAMDISK_IMAGE_START_MASK 0x07FF
87 #define RAMDISK_PROMPT_FLAG 0x8000
88 #define RAMDISK_LOAD_FLAG 0x4000
90 static char command_line
[COMMAND_LINE_SIZE
] = { 0, };
92 struct resource standard_io_resources
[] = {
93 { "dma1", 0x00, 0x1f },
94 { "pic1", 0x20, 0x3f },
95 { "timer", 0x40, 0x5f },
96 { "keyboard", 0x60, 0x6f },
97 { "dma page reg", 0x80, 0x8f },
98 { "pic2", 0xa0, 0xbf },
99 { "dma2", 0xc0, 0xdf },
100 { "fpu", 0xf0, 0xff }
103 #define STANDARD_IO_RESOURCES (sizeof(standard_io_resources)/sizeof(struct resource))
105 /* System RAM - interrupted by the 640kB-1M hole */
106 #define code_resource (ram_resources[3])
107 #define data_resource (ram_resources[4])
108 static struct resource ram_resources
[] = {
109 { "System RAM", 0x000000, 0x09ffff, IORESOURCE_BUSY
},
110 { "System RAM", 0x100000, 0x100000, IORESOURCE_BUSY
},
111 { "Video RAM area", 0x0a0000, 0x0bffff },
112 { "Kernel code", 0x100000, 0 },
113 { "Kernel data", 0, 0 }
116 unsigned long memory_start
, memory_end
;
118 static inline void parse_cmdline (char ** cmdline_p
, char mv_name
[MV_NAME_SIZE
],
119 struct sh_machine_vector
** mvp
,
120 unsigned long *mv_io_base
,
123 char c
= ' ', *to
= command_line
, *from
= COMMAND_LINE
;
126 /* Save unparsed command line copy for /proc/cmdline */
127 memcpy(saved_command_line
, COMMAND_LINE
, COMMAND_LINE_SIZE
);
128 saved_command_line
[COMMAND_LINE_SIZE
-1] = '\0';
130 memory_start
= (unsigned long)PAGE_OFFSET
+__MEMORY_START
;
131 memory_end
= memory_start
+ __MEMORY_SIZE
;
135 * "mem=XXX[kKmM]" defines a size of memory.
137 if (c
== ' ' && !memcmp(from
, "mem=", 4)) {
138 if (to
!= command_line
)
141 unsigned long mem_size
;
143 mem_size
= memparse(from
+4, &from
);
144 memory_end
= memory_start
+ mem_size
;
147 if (c
== ' ' && !memcmp(from
, "sh_mv=", 6)) {
151 if (to
!= command_line
)
154 mv_end
= strchr(from
, ' ');
156 mv_end
= from
+ strlen(from
);
158 mv_comma
= strchr(from
, ',');
159 if ((mv_comma
!= NULL
) && (mv_comma
< mv_end
)) {
161 get_options(mv_comma
+1, ARRAY_SIZE(ints
), ints
);
162 *mv_io_base
= ints
[1];
163 *mv_mmio_enable
= ints
[2];
164 mv_len
= mv_comma
- from
;
166 mv_len
= mv_end
- from
;
168 if (mv_len
> (MV_NAME_SIZE
-1))
169 mv_len
= MV_NAME_SIZE
-1;
170 memcpy(mv_name
, from
, mv_len
);
171 mv_name
[mv_len
] = '\0';
174 *mvp
= get_mv_byname(mv_name
);
179 if (COMMAND_LINE_SIZE
<= ++len
)
184 *cmdline_p
= command_line
;
187 static int __init
sh_mv_setup(char **cmdline_p
)
189 #ifdef CONFIG_SH_UNKNOWN
190 extern struct sh_machine_vector mv_unknown
;
192 struct sh_machine_vector
*mv
= NULL
;
193 char mv_name
[MV_NAME_SIZE
] = "";
194 unsigned long mv_io_base
= 0;
195 int mv_mmio_enable
= 0;
197 parse_cmdline(cmdline_p
, mv_name
, &mv
, &mv_io_base
, &mv_mmio_enable
);
199 #ifdef CONFIG_SH_UNKNOWN
202 if (*mv_name
!= '\0') {
203 printk("Warning: Unsupported machine %s, using unknown\n",
211 * Manually walk the vec, fill in anything that the board hasn't yet
212 * by hand, wrapping to the generic implementation.
214 #define mv_set(elem) do { \
215 if (!sh_mv.mv_##elem) \
216 sh_mv.mv_##elem = generic_##elem; \
219 mv_set(inb
); mv_set(inw
); mv_set(inl
);
220 mv_set(outb
); mv_set(outw
); mv_set(outl
);
222 mv_set(inb_p
); mv_set(inw_p
); mv_set(inl_p
);
223 mv_set(outb_p
); mv_set(outw_p
); mv_set(outl_p
);
225 mv_set(insb
); mv_set(insw
); mv_set(insl
);
226 mv_set(outsb
); mv_set(outsw
); mv_set(outsl
);
228 mv_set(readb
); mv_set(readw
); mv_set(readl
);
229 mv_set(writeb
); mv_set(writew
); mv_set(writel
);
232 mv_set(ioport_unmap
);
235 #ifdef CONFIG_SH_UNKNOWN
236 __set_io_port_base(mv_io_base
);
242 void __init
setup_arch(char **cmdline_p
)
244 unsigned long bootmap_size
;
245 unsigned long start_pfn
, max_pfn
, max_low_pfn
;
247 #ifdef CONFIG_EARLY_PRINTK
248 extern void enable_early_printk(void);
250 enable_early_printk();
252 #ifdef CONFIG_CMDLINE_BOOL
253 strcpy(COMMAND_LINE
, CONFIG_CMDLINE
);
256 ROOT_DEV
= old_decode_dev(ORIG_ROOT_DEV
);
258 #ifdef CONFIG_BLK_DEV_RAM
259 rd_image_start
= RAMDISK_FLAGS
& RAMDISK_IMAGE_START_MASK
;
260 rd_prompt
= ((RAMDISK_FLAGS
& RAMDISK_PROMPT_FLAG
) != 0);
261 rd_doload
= ((RAMDISK_FLAGS
& RAMDISK_LOAD_FLAG
) != 0);
264 if (!MOUNT_ROOT_RDONLY
)
265 root_mountflags
&= ~MS_RDONLY
;
266 init_mm
.start_code
= (unsigned long) _text
;
267 init_mm
.end_code
= (unsigned long) _etext
;
268 init_mm
.end_data
= (unsigned long) _edata
;
269 init_mm
.brk
= (unsigned long) _end
;
271 code_resource
.start
= (unsigned long)virt_to_phys(_text
);
272 code_resource
.end
= (unsigned long)virt_to_phys(_etext
)-1;
273 data_resource
.start
= (unsigned long)virt_to_phys(_etext
);
274 data_resource
.end
= (unsigned long)virt_to_phys(_edata
)-1;
276 sh_mv_setup(cmdline_p
);
278 #define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
279 #define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
280 #define PFN_PHYS(x) ((x) << PAGE_SHIFT)
283 * Find the highest page frame number we have available
285 max_pfn
= PFN_DOWN(__pa(memory_end
));
288 * Determine low and high memory ranges:
290 max_low_pfn
= max_pfn
;
293 * Partially used pages are not usable - thus
294 * we are rounding upwards:
296 start_pfn
= PFN_UP(__pa(_end
));
299 * Find a proper area for the bootmem bitmap. After this
300 * bootstrap step all allocations (until the page allocator
301 * is intact) must be done via bootmem_alloc().
303 bootmap_size
= init_bootmem_node(NODE_DATA(0), start_pfn
,
304 __MEMORY_START
>>PAGE_SHIFT
,
307 * Register fully available low RAM pages with the bootmem allocator.
310 unsigned long curr_pfn
, last_pfn
, pages
;
313 * We are rounding up the start address of usable memory:
315 curr_pfn
= PFN_UP(__MEMORY_START
);
317 * ... and at the end of the usable range downwards:
319 last_pfn
= PFN_DOWN(__pa(memory_end
));
321 if (last_pfn
> max_low_pfn
)
322 last_pfn
= max_low_pfn
;
324 pages
= last_pfn
- curr_pfn
;
325 free_bootmem_node(NODE_DATA(0), PFN_PHYS(curr_pfn
),
330 * Reserve the kernel text and
331 * Reserve the bootmem bitmap. We do this in two steps (first step
332 * was init_bootmem()), because this catches the (definitely buggy)
333 * case of us accidentally initializing the bootmem allocator with
334 * an invalid RAM area.
336 reserve_bootmem_node(NODE_DATA(0), __MEMORY_START
+PAGE_SIZE
,
337 (PFN_PHYS(start_pfn
)+bootmap_size
+PAGE_SIZE
-1)-__MEMORY_START
);
340 * reserve physical page 0 - it's a special BIOS page on many boxes,
341 * enabling clean reboots, SMP operation, laptop functions.
343 reserve_bootmem_node(NODE_DATA(0), __MEMORY_START
, PAGE_SIZE
);
345 #ifdef CONFIG_BLK_DEV_INITRD
346 ROOT_DEV
= MKDEV(RAMDISK_MAJOR
, 0);
347 if (&__rd_start
!= &__rd_end
) {
349 INITRD_START
= PHYSADDR((unsigned long)&__rd_start
) - __MEMORY_START
;
350 INITRD_SIZE
= (unsigned long)&__rd_end
- (unsigned long)&__rd_start
;
353 if (LOADER_TYPE
&& INITRD_START
) {
354 if (INITRD_START
+ INITRD_SIZE
<= (max_low_pfn
<< PAGE_SHIFT
)) {
355 reserve_bootmem_node(NODE_DATA(0), INITRD_START
+__MEMORY_START
, INITRD_SIZE
);
357 INITRD_START
? INITRD_START
+ PAGE_OFFSET
+ __MEMORY_START
: 0;
358 initrd_end
= initrd_start
+ INITRD_SIZE
;
360 printk("initrd extends beyond end of memory "
361 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
362 INITRD_START
+ INITRD_SIZE
,
363 max_low_pfn
<< PAGE_SHIFT
);
369 #ifdef CONFIG_DUMMY_CONSOLE
370 conswitchp
= &dummy_con
;
373 /* Perform the machine specific initialisation */
379 struct sh_machine_vector
* __init
get_mv_byname(const char* name
)
381 extern int strcasecmp(const char *, const char *);
382 extern long __machvec_start
, __machvec_end
;
383 struct sh_machine_vector
*all_vecs
=
384 (struct sh_machine_vector
*)&__machvec_start
;
386 int i
, n
= ((unsigned long)&__machvec_end
387 - (unsigned long)&__machvec_start
)/
388 sizeof(struct sh_machine_vector
);
390 for (i
= 0; i
< n
; ++i
) {
391 struct sh_machine_vector
*mv
= &all_vecs
[i
];
394 if (strcasecmp(name
, get_system_type()) == 0) {
401 static struct cpu cpu
[NR_CPUS
];
403 static int __init
topology_init(void)
407 for (cpu_id
= 0; cpu_id
< NR_CPUS
; cpu_id
++)
408 if (cpu_possible(cpu_id
))
409 register_cpu(&cpu
[cpu_id
], cpu_id
, NULL
);
414 subsys_initcall(topology_init
);
416 static const char *cpu_name
[] = {
417 [CPU_SH7604
] = "SH7604",
418 [CPU_SH7705
] = "SH7705",
419 [CPU_SH7708
] = "SH7708",
420 [CPU_SH7729
] = "SH7729",
421 [CPU_SH7300
] = "SH7300",
422 [CPU_SH7750
] = "SH7750",
423 [CPU_SH7750S
] = "SH7750S",
424 [CPU_SH7750R
] = "SH7750R",
425 [CPU_SH7751
] = "SH7751",
426 [CPU_SH7751R
] = "SH7751R",
427 [CPU_SH7760
] = "SH7760",
428 [CPU_SH73180
] = "SH73180",
429 [CPU_ST40RA
] = "ST40RA",
430 [CPU_ST40GX1
] = "ST40GX1",
431 [CPU_SH4_202
] = "SH4-202",
432 [CPU_SH4_501
] = "SH4-501",
433 [CPU_SH7770
] = "SH7770",
434 [CPU_SH7780
] = "SH7780",
435 [CPU_SH7781
] = "SH7781",
436 [CPU_SH_NONE
] = "Unknown"
439 const char *get_cpu_subtype(void)
441 return cpu_name
[boot_cpu_data
.type
];
444 #ifdef CONFIG_PROC_FS
445 static const char *cpu_flags
[] = {
446 "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr", "ptea", NULL
449 static void show_cpuflags(struct seq_file
*m
)
453 seq_printf(m
, "cpu flags\t:");
455 if (!cpu_data
->flags
) {
456 seq_printf(m
, " %s\n", cpu_flags
[0]);
460 for (i
= 0; cpu_flags
[i
]; i
++)
461 if ((cpu_data
->flags
& (1 << i
)))
462 seq_printf(m
, " %s", cpu_flags
[i
+1]);
467 static void show_cacheinfo(struct seq_file
*m
, const char *type
, struct cache_info info
)
469 unsigned int cache_size
;
471 cache_size
= info
.ways
* info
.sets
* info
.linesz
;
473 seq_printf(m
, "%s size\t: %2dKiB (%d-way)\n",
474 type
, cache_size
>> 10, info
.ways
);
478 * Get CPU information for use by the procfs.
480 static int show_cpuinfo(struct seq_file
*m
, void *v
)
482 unsigned int cpu
= smp_processor_id();
484 if (!cpu
&& cpu_online(cpu
))
485 seq_printf(m
, "machine\t\t: %s\n", get_system_type());
487 seq_printf(m
, "processor\t: %d\n", cpu
);
488 seq_printf(m
, "cpu family\t: %s\n", system_utsname
.machine
);
489 seq_printf(m
, "cpu type\t: %s\n", get_cpu_subtype());
493 seq_printf(m
, "cache type\t: ");
496 * Check for what type of cache we have, we support both the
497 * unified cache on the SH-2 and SH-3, as well as the harvard
498 * style cache on the SH-4.
500 if (test_bit(SH_CACHE_COMBINED
, &(boot_cpu_data
.icache
.flags
))) {
501 seq_printf(m
, "unified\n");
502 show_cacheinfo(m
, "cache", boot_cpu_data
.icache
);
504 seq_printf(m
, "split (harvard)\n");
505 show_cacheinfo(m
, "icache", boot_cpu_data
.icache
);
506 show_cacheinfo(m
, "dcache", boot_cpu_data
.dcache
);
509 seq_printf(m
, "bogomips\t: %lu.%02lu\n",
510 boot_cpu_data
.loops_per_jiffy
/(500000/HZ
),
511 (boot_cpu_data
.loops_per_jiffy
/(5000/HZ
)) % 100);
513 return show_clocks(m
);
516 static void *c_start(struct seq_file
*m
, loff_t
*pos
)
518 return *pos
< NR_CPUS
? cpu_data
+ *pos
: NULL
;
520 static void *c_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
523 return c_start(m
, pos
);
525 static void c_stop(struct seq_file
*m
, void *v
)
528 struct seq_operations cpuinfo_op
= {
532 .show
= show_cpuinfo
,
534 #endif /* CONFIG_PROC_FS */
536 #ifdef CONFIG_SH_KGDB
538 * Parse command-line kgdb options. By default KGDB is enabled,
539 * entered on error (or other action) using default serial info.
540 * The command-line option can include a serial port specification
541 * and an action to override default or configured behavior.
543 struct kgdb_sermap kgdb_sci_sermap
=
544 { "ttySC", 5, kgdb_sci_setup
, NULL
};
546 struct kgdb_sermap
*kgdb_serlist
= &kgdb_sci_sermap
;
547 struct kgdb_sermap
*kgdb_porttype
= &kgdb_sci_sermap
;
549 void kgdb_register_sermap(struct kgdb_sermap
*map
)
551 struct kgdb_sermap
*last
;
553 for (last
= kgdb_serlist
; last
->next
; last
= last
->next
)
557 map
->namelen
= strlen(map
->name
);
561 static int __init
kgdb_parse_options(char *options
)
566 /* Check for port spec (or use default) */
568 /* Determine port type and instance */
569 if (!memcmp(options
, "tty", 3)) {
570 struct kgdb_sermap
*map
= kgdb_serlist
;
572 while (map
&& memcmp(options
, map
->name
, map
->namelen
))
576 KGDB_PRINTK("unknown port spec in %s\n", options
);
581 kgdb_serial_setup
= map
->setup_fn
;
582 kgdb_portnum
= options
[map
->namelen
] - '0';
583 options
+= map
->namelen
+ 1;
585 options
= (*options
== ',') ? options
+1 : options
;
587 /* Read optional parameters (baud/parity/bits) */
588 baud
= simple_strtoul(options
, &options
, 10);
592 c
= toupper(*options
);
593 if (c
== 'E' || c
== 'O' || c
== 'N') {
599 if (c
== '7' || c
== '8') {
603 options
= (*options
== ',') ? options
+1 : options
;
607 /* Check for action specification */
608 if (!memcmp(options
, "halt", 4)) {
611 } else if (!memcmp(options
, "disabled", 8)) {
617 KGDB_PRINTK("ignored unknown options: %s\n", options
);
622 __setup("kgdb=", kgdb_parse_options
);
623 #endif /* CONFIG_SH_KGDB */