setup.c

linux-2.6.15.6

		curr_pfn = PFN_UP(__MEMORY_START);
		/*
		 * ... and at the end of the usable range downwards:
		 */
		last_pfn = PFN_DOWN(__pa(memory_end));

		if (last_pfn > max_low_pfn)
			last_pfn = max_low_pfn;

		pages = last_pfn - curr_pfn;
		free_bootmem_node(NODE_DATA(0), PFN_PHYS(curr_pfn),
				  PFN_PHYS(pages));
	}

	/*
	 * Reserve the kernel text and
	 * Reserve the bootmem bitmap. We do this in two steps (first step
	 * was init_bootmem()), because this catches the (definitely buggy)
	 * case of us accidentally initializing the bootmem allocator with
	 * an invalid RAM area.
	 */
	reserve_bootmem_node(NODE_DATA(0), __MEMORY_START+PAGE_SIZE,
		(PFN_PHYS(start_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START);

	/*
	 * reserve physical page 0 - it's a special BIOS page on many boxes,
	 * enabling clean reboots, SMP operation, laptop functions.
	 */
	reserve_bootmem_node(NODE_DATA(0), __MEMORY_START, PAGE_SIZE);

#ifdef CONFIG_BLK_DEV_INITRD
	ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
	if (&__rd_start != &__rd_end) {
		LOADER_TYPE = 1;
		INITRD_START = PHYSADDR((unsigned long)&__rd_start) - __MEMORY_START;
		INITRD_SIZE = (unsigned long)&__rd_end - (unsigned long)&__rd_start;
	}

	if (LOADER_TYPE && INITRD_START) {
		if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
			reserve_bootmem_node(NODE_DATA(0), INITRD_START+__MEMORY_START, INITRD_SIZE);
			initrd_start =
				INITRD_START ? INITRD_START + PAGE_OFFSET + __MEMORY_START : 0;
			initrd_end = initrd_start + INITRD_SIZE;
		} else {
			printk("initrd extends beyond end of memory "
			    "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
				    INITRD_START + INITRD_SIZE,
				    max_low_pfn << PAGE_SHIFT);
			initrd_start = 0;
		}
	}
#endif

#ifdef CONFIG_DUMMY_CONSOLE
	conswitchp = &dummy_con;
#endif

	/* Perform the machine specific initialisation */
	platform_setup();

	paging_init();
}

struct sh_machine_vector* __init get_mv_byname(const char* name)
{
	extern int strcasecmp(const char *, const char *);
	extern long __machvec_start, __machvec_end;
	struct sh_machine_vector *all_vecs =
		(struct sh_machine_vector *)&__machvec_start;

	int i, n = ((unsigned long)&__machvec_end
		    - (unsigned long)&__machvec_start)/
		sizeof(struct sh_machine_vector);

	for (i = 0; i < n; ++i) {
		struct sh_machine_vector *mv = &all_vecs[i];
		if (mv == NULL)
			continue;
		if (strcasecmp(name, get_system_type()) == 0) {
			return mv;
		}
	}
	return NULL;
}

static struct cpu cpu[NR_CPUS];

static int __init topology_init(void)
{
	int cpu_id;

	for (cpu_id = 0; cpu_id < NR_CPUS; cpu_id++)
		if (cpu_possible(cpu_id))
			register_cpu(&cpu[cpu_id], cpu_id, NULL);

	return 0;
}

subsys_initcall(topology_init);

static const char *cpu_name[] = {
	[CPU_SH7604]	= "SH7604",
	[CPU_SH7705]	= "SH7705",
	[CPU_SH7708]	= "SH7708",
	[CPU_SH7729]	= "SH7729",
	[CPU_SH7300]	= "SH7300",
	[CPU_SH7750]	= "SH7750",
	[CPU_SH7750S]	= "SH7750S",
	[CPU_SH7750R]	= "SH7750R",
	[CPU_SH7751]	= "SH7751",
	[CPU_SH7751R]	= "SH7751R",
	[CPU_SH7760]	= "SH7760",
	[CPU_SH73180]	= "SH73180",
	[CPU_ST40RA]	= "ST40RA",
	[CPU_ST40GX1]	= "ST40GX1",
	[CPU_SH4_202]	= "SH4-202",
	[CPU_SH4_501]	= "SH4-501",
	[CPU_SH_NONE]	= "Unknown"
};

const char *get_cpu_subtype(void)
{
	return cpu_name[boot_cpu_data.type];
}

#ifdef CONFIG_PROC_FS
static const char *cpu_flags[] = {
	"none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
};

static void show_cpuflags(struct seq_file *m)
{
	unsigned long i;

	seq_printf(m, "cpu flags\t:");

	if (!cpu_data->flags) {
		seq_printf(m, " %s\n", cpu_flags[0]);
		return;
	}

	for (i = 0; i < cpu_data->flags; i++)
		if ((cpu_data->flags & (1 << i)))
			seq_printf(m, " %s", cpu_flags[i+1]);

	seq_printf(m, "\n");
}

static void show_cacheinfo(struct seq_file *m, const char *type, struct cache_info info)
{
	unsigned int cache_size;

	cache_size = info.ways * info.sets * info.linesz;

	seq_printf(m, "%s size\t: %dKiB\n", type, cache_size >> 10);
}

/*
 *	Get CPU information for use by the procfs.
 */
static int show_cpuinfo(struct seq_file *m, void *v)
{
	unsigned int cpu = smp_processor_id();

	if (!cpu && cpu_online(cpu))
		seq_printf(m, "machine\t\t: %s\n", get_system_type());

	seq_printf(m, "processor\t: %d\n", cpu);
	seq_printf(m, "cpu family\t: %s\n", system_utsname.machine);
	seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype());

	show_cpuflags(m);

	seq_printf(m, "cache type\t: ");

	/*
	 * Check for what type of cache we have, we support both the
	 * unified cache on the SH-2 and SH-3, as well as the harvard
	 * style cache on the SH-4.
	 */
	if (test_bit(SH_CACHE_COMBINED, &(boot_cpu_data.icache.flags))) {
		seq_printf(m, "unified\n");
		show_cacheinfo(m, "cache", boot_cpu_data.icache);
	} else {
		seq_printf(m, "split (harvard)\n");
		show_cacheinfo(m, "icache", boot_cpu_data.icache);
		show_cacheinfo(m, "dcache", boot_cpu_data.dcache);
	}

	seq_printf(m, "bogomips\t: %lu.%02lu\n",
		     boot_cpu_data.loops_per_jiffy/(500000/HZ),
		     (boot_cpu_data.loops_per_jiffy/(5000/HZ)) % 100);

#define PRINT_CLOCK(name, value) \
	seq_printf(m, name " clock\t: %d.%02dMHz\n", \
		     ((value) / 1000000), ((value) % 1000000)/10000)
	
	PRINT_CLOCK("cpu", boot_cpu_data.cpu_clock);
	PRINT_CLOCK("bus", boot_cpu_data.bus_clock);
#ifdef CONFIG_CPU_SUBTYPE_ST40STB1
	PRINT_CLOCK("memory", boot_cpu_data.memory_clock);
#endif
	PRINT_CLOCK("module", boot_cpu_data.module_clock);

	return 0;
}


static void *c_start(struct seq_file *m, loff_t *pos)
{
	return *pos < NR_CPUS ? cpu_data + *pos : NULL;
}
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
	++*pos;
	return c_start(m, pos);
}
static void c_stop(struct seq_file *m, void *v)
{
}
struct seq_operations cpuinfo_op = {
	.start	= c_start,
	.next	= c_next,
	.stop	= c_stop,
	.show	= show_cpuinfo,
};
#endif /* CONFIG_PROC_FS */

#ifdef CONFIG_SH_KGDB
/*
 * Parse command-line kgdb options.  By default KGDB is enabled,
 * entered on error (or other action) using default serial info.
 * The command-line option can include a serial port specification
 * and an action to override default or configured behavior.
 */
struct kgdb_sermap kgdb_sci_sermap =
{ "ttySC", 5, kgdb_sci_setup, NULL };

struct kgdb_sermap *kgdb_serlist = &kgdb_sci_sermap;
struct kgdb_sermap *kgdb_porttype = &kgdb_sci_sermap;

void kgdb_register_sermap(struct kgdb_sermap *map)
{
	struct kgdb_sermap *last;

	for (last = kgdb_serlist; last->next; last = last->next)
		;
	last->next = map;
	if (!map->namelen) {
		map->namelen = strlen(map->name);
	}
}

static int __init kgdb_parse_options(char *options)
{
	char c;
	int baud;

	/* Check for port spec (or use default) */

	/* Determine port type and instance */
	if (!memcmp(options, "tty", 3)) {
		struct kgdb_sermap *map = kgdb_serlist;

		while (map && memcmp(options, map->name, map->namelen))
			map = map->next;

		if (!map) {
			KGDB_PRINTK("unknown port spec in %s\n", options);
			return -1;
		}

		kgdb_porttype = map;
		kgdb_serial_setup = map->setup_fn;
		kgdb_portnum = options[map->namelen] - '0';
		options += map->namelen + 1;

		options = (*options == ',') ? options+1 : options;
		
		/* Read optional parameters (baud/parity/bits) */
		baud = simple_strtoul(options, &options, 10);
		if (baud != 0) {
			kgdb_baud = baud;

			c = toupper(*options);
			if (c == 'E' || c == 'O' || c == 'N') {
				kgdb_parity = c;
				options++;
			}

			c = *options;
			if (c == '7' || c == '8') {
				kgdb_bits = c;
				options++;
			}
			options = (*options == ',') ? options+1 : options;
		}
	}

	/* Check for action specification */
	if (!memcmp(options, "halt", 4)) {
		kgdb_halt = 1;
		options += 4;
	} else if (!memcmp(options, "disabled", 8)) {
		kgdb_enabled = 0;
		options += 8;
	}

	if (*options) {
                KGDB_PRINTK("ignored unknown options: %s\n", options);
		return 0;
	}
	return 1;
}
__setup("kgdb=", kgdb_parse_options);
#endif /* CONFIG_SH_KGDB */