Linux-2.6.12-rc2v2.6.12-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 000000000000..25b9d9ebe858
--- /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 */
+