/* * 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; unsigned char aux_device_present; 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 };