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, 573 insertions, 0 deletions

diff --git a/arch/arm26/kernel/setup.c b/arch/arm26/kernel/setup.c
new file mode 100644
index 000000000000..4eb329e3828a
--- /dev/null
+++ b/arch/arm26/kernel/setup.c
@@ -0,0 +1,573 @@
+/*
+ *  linux/arch/arm26/kernel/setup.c
+ *
+ *  Copyright (C) 1995-2001 Russell King
+ *  Copyright (C) 2003 Ian Molton
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/stddef.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/utsname.h>
+#include <linux/blkdev.h>
+#include <linux/console.h>
+#include <linux/bootmem.h>
+#include <linux/seq_file.h>
+#include <linux/tty.h>
+#include <linux/init.h>
+#include <linux/root_dev.h>
+
+#include <asm/elf.h>
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/procinfo.h>
+#include <asm/setup.h>
+#include <asm/mach-types.h>
+#include <asm/tlbflush.h>
+
+#include <asm/irqchip.h>
+
+#ifndef MEM_SIZE
+#define MEM_SIZE        (16*1024*1024)
+#endif
+
+#ifdef CONFIG_PREEMPT
+DEFINE_SPINLOCK(kernel_flag);
+#endif
+
+#if defined(CONFIG_FPE_NWFPE)
+char fpe_type[8];
+
+static int __init fpe_setup(char *line)
+{
+        memcpy(fpe_type, line, 8);
+        return 1;
+}
+
+__setup("fpe=", fpe_setup);
+#endif
+
+extern void paging_init(struct meminfo *);
+extern void convert_to_tag_list(struct tag *tags);
+extern void squash_mem_tags(struct tag *tag);
+extern void bootmem_init(struct meminfo *);
+extern int root_mountflags;
+extern int _stext, _text, _etext, _edata, _end;
+#ifdef CONFIG_XIP_KERNEL
+extern int _endtext, _sdata;
+#endif
+
+
+unsigned int processor_id;
+unsigned int __machine_arch_type;
+unsigned int system_rev;
+unsigned int system_serial_low;
+unsigned int system_serial_high;
+unsigned int elf_hwcap;
+unsigned int memc_ctrl_reg;
+unsigned int number_mfm_drives;
+
+struct processor processor;
+
+char elf_platform[ELF_PLATFORM_SIZE];
+
+unsigned long phys_initrd_start __initdata = 0;
+unsigned long phys_initrd_size __initdata = 0;
+static struct meminfo meminfo __initdata = { 0, };
+static struct proc_info_item proc_info;
+static const char *machine_name;
+static char command_line[COMMAND_LINE_SIZE];
+
+static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
+
+/*
+ * Standard memory resources
+ */
+static struct resource mem_res[] = {
+        { "Video RAM",   0,     0,     IORESOURCE_MEM                   },
+        { "Kernel code", 0,     0,     IORESOURCE_MEM                   },
+        { "Kernel data", 0,     0,     IORESOURCE_MEM                   }
+};
+
+#define video_ram   mem_res[0]
+#define kernel_code mem_res[1]
+#define kernel_data mem_res[2]
+
+static struct resource io_res[] = {
+        { "reserved",    0x3bc, 0x3be, IORESOURCE_IO | IORESOURCE_BUSY },
+        { "reserved",    0x378, 0x37f, IORESOURCE_IO | IORESOURCE_BUSY },
+        { "reserved",    0x278, 0x27f, IORESOURCE_IO | IORESOURCE_BUSY }
+};
+
+#define lp0 io_res[0]
+#define lp1 io_res[1]
+#define lp2 io_res[2]
+
+#define dump_cpu_info() do { } while (0)
+
+static void __init setup_processor(void)
+{
+        extern struct proc_info_list __proc_info_begin, __proc_info_end;
+        struct proc_info_list *list;
+
+        /*
+         * locate processor in the list of supported processor
+         * types.  The linker builds this table for us from the
+         * entries in arch/arm26/mm/proc-*.S
+         */
+        for (list = &__proc_info_begin; list < &__proc_info_end ; list++)
+                if ((processor_id & list->cpu_mask) == list->cpu_val)
+                        break;
+
+        /*
+         * If processor type is unrecognised, then we
+         * can do nothing...
+         */
+        if (list >= &__proc_info_end) {
+                printk("CPU configuration botched (ID %08x), unable "
+                       "to continue.\n", processor_id);
+                while (1);
+        }
+
+        proc_info = *list->info;
+        processor = *list->proc;
+
+
+        printk("CPU: %s %s revision %d\n",
+               proc_info.manufacturer, proc_info.cpu_name,
+               (int)processor_id & 15);
+
+        dump_cpu_info();
+
+        sprintf(system_utsname.machine, "%s", list->arch_name);
+        sprintf(elf_platform, "%s", list->elf_name);
+        elf_hwcap = list->elf_hwcap;
+
+        cpu_proc_init();
+}
+
+/*
+ * Initial parsing of the command line.  We need to pick out the
+ * memory size.  We look for mem=size@start, where start and size
+ * are "size[KkMm]"
+ */
+static void __init
+parse_cmdline(struct meminfo *mi, char **cmdline_p, char *from)
+{
+        char c = ' ', *to = command_line;
+        int usermem = 0, len = 0;
+
+        for (;;) {
+                if (c == ' ' && !memcmp(from, "mem=", 4)) {
+                        unsigned long size, start;
+
+                        if (to != command_line)
+                                to -= 1;
+
+                        /*
+                         * If the user specifies memory size, we
+                         * blow away any automatically generated
+                         * size.
+                         */
+                        if (usermem == 0) {
+                                usermem = 1;
+                                mi->nr_banks = 0;
+                        }
+
+                        start = PHYS_OFFSET;
+                        size  = memparse(from + 4, &from);
+                        if (*from == '@')
+                                start = memparse(from + 1, &from);
+
+                        mi->bank[mi->nr_banks].start = start;
+                        mi->bank[mi->nr_banks].size  = size;
+                        mi->bank[mi->nr_banks].node  = PHYS_TO_NID(start);
+                        mi->nr_banks += 1;
+                }
+                c = *from++;
+                if (!c)
+                        break;
+                if (COMMAND_LINE_SIZE <= ++len)
+                        break;
+                *to++ = c;
+        }
+        *to = '\0';
+        *cmdline_p = command_line;
+}
+
+static void __init
+setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
+{
+#ifdef CONFIG_BLK_DEV_RAM
+        extern int rd_size, rd_image_start, rd_prompt, rd_doload;
+
+        rd_image_start = image_start;
+        rd_prompt = prompt;
+        rd_doload = doload;
+
+        if (rd_sz)
+                rd_size = rd_sz;
+#endif
+}
+
+static void __init
+request_standard_resources(struct meminfo *mi)
+{
+        struct resource *res;
+        int i;
+
+        kernel_code.start  = init_mm.start_code;
+        kernel_code.end    = init_mm.end_code - 1;
+#ifdef CONFIG_XIP_KERNEL
+        kernel_data.start  = init_mm.start_data;
+#else
+        kernel_data.start  = init_mm.end_code;
+#endif
+        kernel_data.end    = init_mm.brk - 1;
+
+        for (i = 0; i < mi->nr_banks; i++) {
+                unsigned long virt_start, virt_end;
+
+                if (mi->bank[i].size == 0)
+                        continue;
+
+                virt_start = mi->bank[i].start;
+                virt_end   = virt_start + mi->bank[i].size - 1;
+
+                res = alloc_bootmem_low(sizeof(*res));
+                res->name  = "System RAM";
+                res->start = virt_start;
+                res->end   = virt_end;
+                res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+
+                request_resource(&iomem_resource, res);
+
+                if (kernel_code.start >= res->start &&
+                    kernel_code.end <= res->end)
+                        request_resource(res, &kernel_code);
+                if (kernel_data.start >= res->start &&
+                    kernel_data.end <= res->end)
+                        request_resource(res, &kernel_data);
+        }
+
+/*      FIXME - needed? if (mdesc->video_start) {
+                video_ram.start = mdesc->video_start;
+                video_ram.end   = mdesc->video_end;
+                request_resource(&iomem_resource, &video_ram);
+        }*/
+
+        /*
+         * Some machines don't have the possibility of ever
+         * possessing lp1 or lp2
+         */
+        if (0)  /* FIXME - need to do this for A5k at least */
+                request_resource(&ioport_resource, &lp0);
+}
+
+/*
+ *  Tag parsing.
+ *
+ * This is the new way of passing data to the kernel at boot time.  Rather
+ * than passing a fixed inflexible structure to the kernel, we pass a list
+ * of variable-sized tags to the kernel.  The first tag must be a ATAG_CORE
+ * tag for the list to be recognised (to distinguish the tagged list from
+ * a param_struct).  The list is terminated with a zero-length tag (this tag
+ * is not parsed in any way).
+ */
+static int __init parse_tag_core(const struct tag *tag)
+{
+        if (tag->hdr.size > 2) {
+                if ((tag->u.core.flags & 1) == 0)
+                        root_mountflags &= ~MS_RDONLY;
+                ROOT_DEV = old_decode_dev(tag->u.core.rootdev);
+        }
+        return 0;
+}
+
+__tagtable(ATAG_CORE, parse_tag_core);
+
+static int __init parse_tag_mem32(const struct tag *tag)
+{
+        if (meminfo.nr_banks >= NR_BANKS) {
+                printk(KERN_WARNING
+                       "Ignoring memory bank 0x%08x size %dKB\n",
+                        tag->u.mem.start, tag->u.mem.size / 1024);
+                return -EINVAL;
+        }
+        meminfo.bank[meminfo.nr_banks].start = tag->u.mem.start;
+        meminfo.bank[meminfo.nr_banks].size  = tag->u.mem.size;
+        meminfo.bank[meminfo.nr_banks].node  = PHYS_TO_NID(tag->u.mem.start);
+        meminfo.nr_banks += 1;
+
+        return 0;
+}
+
+__tagtable(ATAG_MEM, parse_tag_mem32);
+
+#if defined(CONFIG_DUMMY_CONSOLE)
+struct screen_info screen_info = {
+ .orig_video_lines      = 30,
+ .orig_video_cols       = 80,
+ .orig_video_mode       = 0,
+ .orig_video_ega_bx     = 0,
+ .orig_video_isVGA      = 1,
+ .orig_video_points     = 8
+};
+
+static int __init parse_tag_videotext(const struct tag *tag)
+{
+        screen_info.orig_x            = tag->u.videotext.x;
+        screen_info.orig_y            = tag->u.videotext.y;
+        screen_info.orig_video_page   = tag->u.videotext.video_page;
+        screen_info.orig_video_mode   = tag->u.videotext.video_mode;
+        screen_info.orig_video_cols   = tag->u.videotext.video_cols;
+        screen_info.orig_video_ega_bx = tag->u.videotext.video_ega_bx;
+        screen_info.orig_video_lines  = tag->u.videotext.video_lines;
+        screen_info.orig_video_isVGA  = tag->u.videotext.video_isvga;
+        screen_info.orig_video_points = tag->u.videotext.video_points;
+        return 0;
+}
+
+__tagtable(ATAG_VIDEOTEXT, parse_tag_videotext);
+#endif
+
+static int __init parse_tag_acorn(const struct tag *tag)
+{
+        memc_ctrl_reg = tag->u.acorn.memc_control_reg;
+        number_mfm_drives = tag->u.acorn.adfsdrives;
+        return 0;
+}
+
+__tagtable(ATAG_ACORN, parse_tag_acorn);
+
+static int __init parse_tag_ramdisk(const struct tag *tag)
+{
+        setup_ramdisk((tag->u.ramdisk.flags & 1) == 0,
+                      (tag->u.ramdisk.flags & 2) == 0,
+                      tag->u.ramdisk.start, tag->u.ramdisk.size);
+        return 0;
+}
+
+__tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
+
+static int __init parse_tag_initrd(const struct tag *tag)
+{
+        printk(KERN_WARNING "ATAG_INITRD is deprecated; please update your bootloader. \n");
+        phys_initrd_start = (unsigned long)tag->u.initrd.start;
+        phys_initrd_size = (unsigned long)tag->u.initrd.size;
+        return 0;
+}
+
+__tagtable(ATAG_INITRD, parse_tag_initrd);
+
+static int __init parse_tag_initrd2(const struct tag *tag)
+{
+        printk(KERN_WARNING "ATAG_INITRD is deprecated; please update your bootloader. \n");
+        phys_initrd_start = (unsigned long)tag->u.initrd.start;
+        phys_initrd_size = (unsigned long)tag->u.initrd.size;
+        return 0;
+}
+
+__tagtable(ATAG_INITRD2, parse_tag_initrd2);
+
+static int __init parse_tag_serialnr(const struct tag *tag)
+{
+        system_serial_low = tag->u.serialnr.low;
+        system_serial_high = tag->u.serialnr.high;
+        return 0;
+}
+
+__tagtable(ATAG_SERIAL, parse_tag_serialnr);
+
+static int __init parse_tag_revision(const struct tag *tag)
+{
+        system_rev = tag->u.revision.rev;
+        return 0;
+}
+
+__tagtable(ATAG_REVISION, parse_tag_revision);
+
+static int __init parse_tag_cmdline(const struct tag *tag)
+{
+        strncpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
+        default_command_line[COMMAND_LINE_SIZE - 1] = '\0';
+        return 0;
+}
+
+__tagtable(ATAG_CMDLINE, parse_tag_cmdline);
+
+/*
+ * Scan the tag table for this tag, and call its parse function.
+ * The tag table is built by the linker from all the __tagtable
+ * declarations.
+ */
+static int __init parse_tag(const struct tag *tag)
+{
+        extern struct tagtable __tagtable_begin, __tagtable_end;
+        struct tagtable *t;
+
+        for (t = &__tagtable_begin; t < &__tagtable_end; t++)
+                if (tag->hdr.tag == t->tag) {
+                        t->parse(tag);
+                        break;
+                }
+
+        return t < &__tagtable_end;
+}
+
+/*
+ * Parse all tags in the list, checking both the global and architecture
+ * specific tag tables.
+ */
+static void __init parse_tags(const struct tag *t)
+{
+        for (; t->hdr.size; t = tag_next(t))
+                if (!parse_tag(t))
+                        printk(KERN_WARNING
+                                "Ignoring unrecognised tag 0x%08x\n",
+                                t->hdr.tag);
+}
+
+/*
+ * This holds our defaults.
+ */
+static struct init_tags {
+        struct tag_header hdr1;
+        struct tag_core   core;
+        struct tag_header hdr2;
+        struct tag_mem32  mem;
+        struct tag_header hdr3;
+} init_tags __initdata = {
+        { tag_size(tag_core), ATAG_CORE },
+        { 1, PAGE_SIZE, 0xff },
+        { tag_size(tag_mem32), ATAG_MEM },
+        { MEM_SIZE, PHYS_OFFSET },
+        { 0, ATAG_NONE }
+};
+
+void __init setup_arch(char **cmdline_p)
+{
+        struct tag *tags = (struct tag *)&init_tags;
+        char *from = default_command_line;
+
+        setup_processor();
+        if(machine_arch_type == MACH_TYPE_A5K)
+                machine_name = "A5000";
+        else if(machine_arch_type == MACH_TYPE_ARCHIMEDES)
+                machine_name = "Archimedes";
+        else
+                machine_name = "UNKNOWN";
+
+        //FIXME - the tag struct is always copied here but this is a block
+        // of RAM that is accidentally reserved along with video RAM. perhaps
+        // it would be a good idea to explicitly reserve this?
+
+        tags = (struct tag *)0x0207c000;
+
+        /*
+         * If we have the old style parameters, convert them to
+         * a tag list.
+         */
+        if (tags->hdr.tag != ATAG_CORE)
+                convert_to_tag_list(tags);
+        if (tags->hdr.tag != ATAG_CORE)
+                tags = (struct tag *)&init_tags;
+        if (tags->hdr.tag == ATAG_CORE) {
+                if (meminfo.nr_banks != 0)
+                        squash_mem_tags(tags);
+                parse_tags(tags);
+        }
+
+        init_mm.start_code = (unsigned long) &_text;
+#ifndef CONFIG_XIP_KERNEL
+        init_mm.end_code   = (unsigned long) &_etext;
+#else
+        init_mm.end_code   = (unsigned long) &_endtext;
+        init_mm.start_data   = (unsigned long) &_sdata;
+#endif
+        init_mm.end_data   = (unsigned long) &_edata;
+        init_mm.brk        = (unsigned long) &_end;
+
+        memcpy(saved_command_line, from, COMMAND_LINE_SIZE);
+        saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
+        parse_cmdline(&meminfo, cmdline_p, from);
+        bootmem_init(&meminfo);
+        paging_init(&meminfo);
+        request_standard_resources(&meminfo);
+
+#ifdef CONFIG_VT
+#if defined(CONFIG_DUMMY_CONSOLE)
+        conswitchp = &dummy_con;
+#endif
+#endif
+}
+
+static const char *hwcap_str[] = {
+        "swp",
+        "half",
+        "thumb",
+        "26bit",
+        "fastmult",
+        "fpa",
+        "vfp",
+        "edsp",
+        NULL
+};
+
+static int c_show(struct seq_file *m, void *v)
+{
+        int i;
+
+        seq_printf(m, "Processor\t: %s %s rev %d (%s)\n",
+                   proc_info.manufacturer, proc_info.cpu_name,
+                   (int)processor_id & 15, elf_platform);
+
+        seq_printf(m, "BogoMIPS\t: %lu.%02lu\n",
+                   loops_per_jiffy / (500000/HZ),
+                   (loops_per_jiffy / (5000/HZ)) % 100);
+
+        /* dump out the processor features */
+        seq_puts(m, "Features\t: ");
+
+        for (i = 0; hwcap_str[i]; i++)
+                if (elf_hwcap & (1 << i))
+                        seq_printf(m, "%s ", hwcap_str[i]);
+
+        seq_puts(m, "\n");
+
+        seq_printf(m, "CPU part\t\t: %07x\n", processor_id >> 4);
+        seq_printf(m, "CPU revision\t: %d\n\n", processor_id & 15);
+        seq_printf(m, "Hardware\t: %s\n", machine_name);
+        seq_printf(m, "Revision\t: %04x\n", system_rev);
+        seq_printf(m, "Serial\t\t: %08x%08x\n",
+                   system_serial_high, system_serial_low);
+
+        return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+        return *pos < 1 ? (void *)1 : NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+        ++*pos;
+        return NULL;
+}
+
+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   = c_show
+};