Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 649 insertions, 0 deletions

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
new file mode 100644
index 00000000000..25b9d9ebe85
--- /dev/null
+++ b/arch/sh/kernel/setup.c
@@ -0,0 +1,649 @@
+/* $Id: setup.c,v 1.30 2003/10/13 07:21:19 lethal Exp $
+ *
+ *  linux/arch/sh/kernel/setup.c
+ *
+ *  Copyright (C) 1999  Niibe Yutaka
+ *  Copyright (C) 2002, 2003  Paul Mundt
+ */
+
+/*
+ * This file handles the architecture-dependent parts of initialization
+ */
+
+#include <linux/tty.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/initrd.h>
+#include <linux/bootmem.h>
+#include <linux/console.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/utsname.h>
+#include <linux/cpu.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/io_generic.h>
+#include <asm/sections.h>
+#include <asm/irq.h>
+#include <asm/setup.h>
+
+#ifdef CONFIG_SH_KGDB
+#include <asm/kgdb.h>
+static int kgdb_parse_options(char *options);
+#endif
+extern void * __rd_start, * __rd_end;
+/*
+ * Machine setup..
+ */
+
+/*
+ * Initialize loops_per_jiffy as 10000000 (1000MIPS).
+ * This value will be used at the very early stage of serial setup.
+ * The bigger value means no problem.
+ */
+struct sh_cpuinfo boot_cpu_data = { CPU_SH_NONE, 0, 10000000, };
+struct screen_info screen_info;
+
+#if defined(CONFIG_SH_UNKNOWN)
+struct sh_machine_vector sh_mv;
+#endif
+
+/* We need this to satisfy some external references. */
+struct screen_info screen_info = {
+        0, 25,                  /* orig-x, orig-y */
+        0,                      /* unused */
+        0,                      /* orig-video-page */
+        0,                      /* orig-video-mode */
+        80,                     /* orig-video-cols */
+        0,0,0,                  /* ega_ax, ega_bx, ega_cx */
+        25,                     /* orig-video-lines */
+        0,                      /* orig-video-isVGA */
+        16                      /* orig-video-points */
+};
+
+extern void platform_setup(void);
+extern char *get_system_type(void);
+extern int root_mountflags;
+
+#define MV_NAME_SIZE 32
+
+static struct sh_machine_vector* __init get_mv_byname(const char* name);
+
+/*
+ * This is set up by the setup-routine at boot-time
+ */
+#define PARAM	((unsigned char *)empty_zero_page)
+
+#define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))
+#define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004))
+#define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008))
+#define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c))
+#define INITRD_START (*(unsigned long *) (PARAM+0x010))
+#define INITRD_SIZE (*(unsigned long *) (PARAM+0x014))
+/* ... */
+#define COMMAND_LINE ((char *) (PARAM+0x100))
+
+#define RAMDISK_IMAGE_START_MASK  	0x07FF
+#define RAMDISK_PROMPT_FLAG		0x8000
+#define RAMDISK_LOAD_FLAG		0x4000	
+
+static char command_line[COMMAND_LINE_SIZE] = { 0, };
+
+struct resource standard_io_resources[] = {
+	{ "dma1", 0x00, 0x1f },
+	{ "pic1", 0x20, 0x3f },
+	{ "timer", 0x40, 0x5f },
+	{ "keyboard", 0x60, 0x6f },
+	{ "dma page reg", 0x80, 0x8f },
+	{ "pic2", 0xa0, 0xbf },
+	{ "dma2", 0xc0, 0xdf },
+	{ "fpu", 0xf0, 0xff }
+};
+
+#define STANDARD_IO_RESOURCES (sizeof(standard_io_resources)/sizeof(struct resource))
+
+/* System RAM - interrupted by the 640kB-1M hole */
+#define code_resource (ram_resources[3])
+#define data_resource (ram_resources[4])
+static struct resource ram_resources[] = {
+	{ "System RAM", 0x000000, 0x09ffff, IORESOURCE_BUSY },
+	{ "System RAM", 0x100000, 0x100000, IORESOURCE_BUSY },
+	{ "Video RAM area", 0x0a0000, 0x0bffff },
+	{ "Kernel code", 0x100000, 0 },
+	{ "Kernel data", 0, 0 }
+};
+
+unsigned long memory_start, memory_end;
+
+static inline void parse_cmdline (char ** cmdline_p, char mv_name[MV_NAME_SIZE],
+				  struct sh_machine_vector** mvp,
+				  unsigned long *mv_io_base,
+				  int *mv_mmio_enable)
+{
+	char c = ' ', *to = command_line, *from = COMMAND_LINE;
+	int len = 0;
+
+	/* Save unparsed command line copy for /proc/cmdline */
+	memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
+	saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
+
+	memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START;
+	memory_end = memory_start + __MEMORY_SIZE;
+
+	for (;;) {
+		/*
+		 * "mem=XXX[kKmM]" defines a size of memory.
+		 */
+		if (c == ' ' && !memcmp(from, "mem=", 4)) {
+			if (to != command_line)
+				to--;
+			{
+				unsigned long mem_size;
+
+				mem_size = memparse(from+4, &from);
+				memory_end = memory_start + mem_size;
+			}
+		}
+		if (c == ' ' && !memcmp(from, "sh_mv=", 6)) {
+			char* mv_end;
+			char* mv_comma;
+			int mv_len;
+			if (to != command_line)
+				to--;
+			from += 6;
+			mv_end = strchr(from, ' ');
+			if (mv_end == NULL)
+				mv_end = from + strlen(from);
+
+			mv_comma = strchr(from, ',');
+			if ((mv_comma != NULL) && (mv_comma < mv_end)) {
+				int ints[3];
+				get_options(mv_comma+1, ARRAY_SIZE(ints), ints);
+				*mv_io_base = ints[1];
+				*mv_mmio_enable = ints[2];
+				mv_len = mv_comma - from;
+			} else {
+				mv_len = mv_end - from;
+			}
+			if (mv_len > (MV_NAME_SIZE-1))
+				mv_len = MV_NAME_SIZE-1;
+			memcpy(mv_name, from, mv_len);
+			mv_name[mv_len] = '\0';
+			from = mv_end;
+
+			*mvp = get_mv_byname(mv_name);
+		}
+		c = *(from++);
+		if (!c)
+			break;
+		if (COMMAND_LINE_SIZE <= ++len)
+			break;
+		*(to++) = c;
+	}
+	*to = '\0';
+	*cmdline_p = command_line;
+}
+
+static int __init sh_mv_setup(char **cmdline_p)
+{
+#if defined(CONFIG_SH_UNKNOWN)
+	extern struct sh_machine_vector mv_unknown;
+#endif
+	struct sh_machine_vector *mv = NULL;
+	char mv_name[MV_NAME_SIZE] = "";
+	unsigned long mv_io_base = 0;
+	int mv_mmio_enable = 0;
+
+	parse_cmdline(cmdline_p, mv_name, &mv, &mv_io_base, &mv_mmio_enable);
+
+#ifdef CONFIG_SH_GENERIC
+	if (mv == NULL) {
+		mv = &mv_unknown;
+		if (*mv_name != '\0') {
+			printk("Warning: Unsupported machine %s, using unknown\n",
+			       mv_name);
+		}
+	}
+	sh_mv = *mv;
+#endif
+#ifdef CONFIG_SH_UNKNOWN
+	sh_mv = mv_unknown;
+#endif
+
+	/*
+	 * Manually walk the vec, fill in anything that the board hasn't yet
+	 * by hand, wrapping to the generic implementation.
+	 */
+#define mv_set(elem) do { \
+	if (!sh_mv.mv_##elem) \
+		sh_mv.mv_##elem = generic_##elem; \
+} while (0)
+
+	mv_set(inb);	mv_set(inw);	mv_set(inl);
+	mv_set(outb);	mv_set(outw);	mv_set(outl);
+
+	mv_set(inb_p);	mv_set(inw_p);	mv_set(inl_p);
+	mv_set(outb_p);	mv_set(outw_p);	mv_set(outl_p);
+
+	mv_set(insb);	mv_set(insw);	mv_set(insl);
+	mv_set(outsb);	mv_set(outsw);	mv_set(outsl);
+
+	mv_set(readb);	mv_set(readw);	mv_set(readl);
+	mv_set(writeb);	mv_set(writew);	mv_set(writel);
+
+	mv_set(ioremap);
+	mv_set(iounmap);
+
+	mv_set(isa_port2addr);
+	mv_set(irq_demux);
+
+#ifdef CONFIG_SH_UNKNOWN
+	__set_io_port_base(mv_io_base);
+#endif
+
+	return 0;
+}
+
+void __init setup_arch(char **cmdline_p)
+{
+	unsigned long bootmap_size;
+	unsigned long start_pfn, max_pfn, max_low_pfn;
+
+#ifdef CONFIG_EARLY_PRINTK
+	extern void enable_early_printk(void);
+
+	enable_early_printk();
+#endif
+#ifdef CONFIG_CMDLINE_BOOL
+        strcpy(COMMAND_LINE, CONFIG_CMDLINE);
+#endif
+
+	ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
+
+#ifdef CONFIG_BLK_DEV_RAM
+	rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
+	rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
+	rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
+#endif
+
+	if (!MOUNT_ROOT_RDONLY)
+		root_mountflags &= ~MS_RDONLY;
+	init_mm.start_code = (unsigned long) _text;
+	init_mm.end_code = (unsigned long) _etext;
+	init_mm.end_data = (unsigned long) _edata;
+	init_mm.brk = (unsigned long) _end;
+
+	code_resource.start = virt_to_bus(_text);
+	code_resource.end = virt_to_bus(_etext)-1;
+	data_resource.start = virt_to_bus(_etext);
+	data_resource.end = virt_to_bus(_edata)-1;
+
+	sh_mv_setup(cmdline_p);
+
+#define PFN_UP(x)	(((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
+#define PFN_DOWN(x)	((x) >> PAGE_SHIFT)
+#define PFN_PHYS(x)	((x) << PAGE_SHIFT)
+
+#ifdef CONFIG_DISCONTIGMEM
+	NODE_DATA(0)->bdata = &discontig_node_bdata[0];
+	NODE_DATA(1)->bdata = &discontig_node_bdata[1];
+
+	bootmap_size = init_bootmem_node(NODE_DATA(1), 
+					 PFN_UP(__MEMORY_START_2ND),
+					 PFN_UP(__MEMORY_START_2ND),
+					 PFN_DOWN(__MEMORY_START_2ND+__MEMORY_SIZE_2ND));
+	free_bootmem_node(NODE_DATA(1), __MEMORY_START_2ND, __MEMORY_SIZE_2ND);
+	reserve_bootmem_node(NODE_DATA(1), __MEMORY_START_2ND, bootmap_size);
+#endif
+
+	/*
+	 * Find the highest page frame number we have available
+	 */
+	max_pfn = PFN_DOWN(__pa(memory_end));
+
+	/*
+	 * Determine low and high memory ranges:
+	 */
+	max_low_pfn = max_pfn;
+
+ 	/*
+	 * Partially used pages are not usable - thus
+	 * we are rounding upwards:
+ 	 */
+	start_pfn = PFN_UP(__pa(_end));
+
+	/*
+	 * Find a proper area for the bootmem bitmap. After this
+	 * bootstrap step all allocations (until the page allocator
+	 * is intact) must be done via bootmem_alloc().
+	 */
+	bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
+					 __MEMORY_START>>PAGE_SHIFT,
+					 max_low_pfn);
+	/*
+	 * Register fully available low RAM pages with the bootmem allocator.
+	 */
+	{
+		unsigned long curr_pfn, last_pfn, pages;
+
+		/*
+		 * We are rounding up the start address of usable memory:
+		 */
+		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 */
+