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-rw-r--r--arch/arm26/kernel/setup.c573
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 00000000000..4eb329e3828
--- /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
+};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-19 13:50:30 +0000