1da177e4c3
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!
650 lines
16 KiB
C
650 lines
16 KiB
C
/* $Id: setup.c,v 1.30 2003/10/13 07:21:19 lethal Exp $
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*
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* linux/arch/sh/kernel/setup.c
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*
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* Copyright (C) 1999 Niibe Yutaka
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* Copyright (C) 2002, 2003 Paul Mundt
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*/
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/*
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* This file handles the architecture-dependent parts of initialization
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*/
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#include <linux/tty.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/initrd.h>
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#include <linux/bootmem.h>
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#include <linux/console.h>
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#include <linux/seq_file.h>
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#include <linux/root_dev.h>
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#include <linux/utsname.h>
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#include <linux/cpu.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <asm/io_generic.h>
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#include <asm/sections.h>
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#include <asm/irq.h>
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#include <asm/setup.h>
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#ifdef CONFIG_SH_KGDB
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#include <asm/kgdb.h>
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static int kgdb_parse_options(char *options);
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#endif
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extern void * __rd_start, * __rd_end;
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/*
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* Machine setup..
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*/
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/*
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* Initialize loops_per_jiffy as 10000000 (1000MIPS).
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* This value will be used at the very early stage of serial setup.
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* The bigger value means no problem.
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*/
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struct sh_cpuinfo boot_cpu_data = { CPU_SH_NONE, 0, 10000000, };
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struct screen_info screen_info;
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#if defined(CONFIG_SH_UNKNOWN)
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struct sh_machine_vector sh_mv;
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#endif
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/* We need this to satisfy some external references. */
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struct screen_info screen_info = {
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0, 25, /* orig-x, orig-y */
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0, /* unused */
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0, /* orig-video-page */
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0, /* orig-video-mode */
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80, /* orig-video-cols */
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0,0,0, /* ega_ax, ega_bx, ega_cx */
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25, /* orig-video-lines */
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0, /* orig-video-isVGA */
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16 /* orig-video-points */
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};
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extern void platform_setup(void);
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extern char *get_system_type(void);
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extern int root_mountflags;
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#define MV_NAME_SIZE 32
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static struct sh_machine_vector* __init get_mv_byname(const char* name);
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/*
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* This is set up by the setup-routine at boot-time
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*/
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#define PARAM ((unsigned char *)empty_zero_page)
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#define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))
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#define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004))
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#define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008))
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#define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c))
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#define INITRD_START (*(unsigned long *) (PARAM+0x010))
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#define INITRD_SIZE (*(unsigned long *) (PARAM+0x014))
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/* ... */
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#define COMMAND_LINE ((char *) (PARAM+0x100))
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#define RAMDISK_IMAGE_START_MASK 0x07FF
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#define RAMDISK_PROMPT_FLAG 0x8000
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#define RAMDISK_LOAD_FLAG 0x4000
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static char command_line[COMMAND_LINE_SIZE] = { 0, };
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struct resource standard_io_resources[] = {
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{ "dma1", 0x00, 0x1f },
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{ "pic1", 0x20, 0x3f },
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{ "timer", 0x40, 0x5f },
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{ "keyboard", 0x60, 0x6f },
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{ "dma page reg", 0x80, 0x8f },
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{ "pic2", 0xa0, 0xbf },
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{ "dma2", 0xc0, 0xdf },
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{ "fpu", 0xf0, 0xff }
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};
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#define STANDARD_IO_RESOURCES (sizeof(standard_io_resources)/sizeof(struct resource))
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/* System RAM - interrupted by the 640kB-1M hole */
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#define code_resource (ram_resources[3])
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#define data_resource (ram_resources[4])
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static struct resource ram_resources[] = {
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{ "System RAM", 0x000000, 0x09ffff, IORESOURCE_BUSY },
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{ "System RAM", 0x100000, 0x100000, IORESOURCE_BUSY },
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{ "Video RAM area", 0x0a0000, 0x0bffff },
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{ "Kernel code", 0x100000, 0 },
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{ "Kernel data", 0, 0 }
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};
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unsigned long memory_start, memory_end;
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static inline void parse_cmdline (char ** cmdline_p, char mv_name[MV_NAME_SIZE],
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struct sh_machine_vector** mvp,
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unsigned long *mv_io_base,
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int *mv_mmio_enable)
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{
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char c = ' ', *to = command_line, *from = COMMAND_LINE;
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int len = 0;
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/* Save unparsed command line copy for /proc/cmdline */
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memcpy(saved_command_line, COMMAND_LINE, COMMAND_LINE_SIZE);
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saved_command_line[COMMAND_LINE_SIZE-1] = '\0';
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memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START;
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memory_end = memory_start + __MEMORY_SIZE;
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for (;;) {
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/*
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* "mem=XXX[kKmM]" defines a size of memory.
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*/
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if (c == ' ' && !memcmp(from, "mem=", 4)) {
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if (to != command_line)
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to--;
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{
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unsigned long mem_size;
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mem_size = memparse(from+4, &from);
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memory_end = memory_start + mem_size;
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}
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}
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if (c == ' ' && !memcmp(from, "sh_mv=", 6)) {
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char* mv_end;
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char* mv_comma;
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int mv_len;
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if (to != command_line)
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to--;
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from += 6;
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mv_end = strchr(from, ' ');
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if (mv_end == NULL)
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mv_end = from + strlen(from);
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mv_comma = strchr(from, ',');
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if ((mv_comma != NULL) && (mv_comma < mv_end)) {
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int ints[3];
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get_options(mv_comma+1, ARRAY_SIZE(ints), ints);
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*mv_io_base = ints[1];
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*mv_mmio_enable = ints[2];
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mv_len = mv_comma - from;
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} else {
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mv_len = mv_end - from;
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}
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if (mv_len > (MV_NAME_SIZE-1))
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mv_len = MV_NAME_SIZE-1;
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memcpy(mv_name, from, mv_len);
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mv_name[mv_len] = '\0';
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from = mv_end;
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*mvp = get_mv_byname(mv_name);
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}
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c = *(from++);
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if (!c)
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break;
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if (COMMAND_LINE_SIZE <= ++len)
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break;
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*(to++) = c;
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}
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*to = '\0';
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*cmdline_p = command_line;
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}
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static int __init sh_mv_setup(char **cmdline_p)
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{
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#if defined(CONFIG_SH_UNKNOWN)
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extern struct sh_machine_vector mv_unknown;
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#endif
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struct sh_machine_vector *mv = NULL;
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char mv_name[MV_NAME_SIZE] = "";
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unsigned long mv_io_base = 0;
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int mv_mmio_enable = 0;
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parse_cmdline(cmdline_p, mv_name, &mv, &mv_io_base, &mv_mmio_enable);
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#ifdef CONFIG_SH_GENERIC
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if (mv == NULL) {
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mv = &mv_unknown;
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if (*mv_name != '\0') {
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printk("Warning: Unsupported machine %s, using unknown\n",
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mv_name);
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}
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}
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sh_mv = *mv;
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#endif
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#ifdef CONFIG_SH_UNKNOWN
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sh_mv = mv_unknown;
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#endif
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/*
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* Manually walk the vec, fill in anything that the board hasn't yet
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* by hand, wrapping to the generic implementation.
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*/
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#define mv_set(elem) do { \
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if (!sh_mv.mv_##elem) \
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sh_mv.mv_##elem = generic_##elem; \
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} while (0)
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mv_set(inb); mv_set(inw); mv_set(inl);
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mv_set(outb); mv_set(outw); mv_set(outl);
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mv_set(inb_p); mv_set(inw_p); mv_set(inl_p);
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mv_set(outb_p); mv_set(outw_p); mv_set(outl_p);
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mv_set(insb); mv_set(insw); mv_set(insl);
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mv_set(outsb); mv_set(outsw); mv_set(outsl);
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mv_set(readb); mv_set(readw); mv_set(readl);
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mv_set(writeb); mv_set(writew); mv_set(writel);
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mv_set(ioremap);
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mv_set(iounmap);
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mv_set(isa_port2addr);
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mv_set(irq_demux);
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#ifdef CONFIG_SH_UNKNOWN
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__set_io_port_base(mv_io_base);
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#endif
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return 0;
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}
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void __init setup_arch(char **cmdline_p)
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{
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unsigned long bootmap_size;
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unsigned long start_pfn, max_pfn, max_low_pfn;
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#ifdef CONFIG_EARLY_PRINTK
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extern void enable_early_printk(void);
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enable_early_printk();
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#endif
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#ifdef CONFIG_CMDLINE_BOOL
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strcpy(COMMAND_LINE, CONFIG_CMDLINE);
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#endif
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ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
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#ifdef CONFIG_BLK_DEV_RAM
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rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
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rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
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rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
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#endif
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if (!MOUNT_ROOT_RDONLY)
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root_mountflags &= ~MS_RDONLY;
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init_mm.start_code = (unsigned long) _text;
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init_mm.end_code = (unsigned long) _etext;
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init_mm.end_data = (unsigned long) _edata;
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init_mm.brk = (unsigned long) _end;
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code_resource.start = virt_to_bus(_text);
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code_resource.end = virt_to_bus(_etext)-1;
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data_resource.start = virt_to_bus(_etext);
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data_resource.end = virt_to_bus(_edata)-1;
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sh_mv_setup(cmdline_p);
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#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
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#define PFN_DOWN(x) ((x) >> PAGE_SHIFT)
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#define PFN_PHYS(x) ((x) << PAGE_SHIFT)
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#ifdef CONFIG_DISCONTIGMEM
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NODE_DATA(0)->bdata = &discontig_node_bdata[0];
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NODE_DATA(1)->bdata = &discontig_node_bdata[1];
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bootmap_size = init_bootmem_node(NODE_DATA(1),
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PFN_UP(__MEMORY_START_2ND),
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PFN_UP(__MEMORY_START_2ND),
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PFN_DOWN(__MEMORY_START_2ND+__MEMORY_SIZE_2ND));
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free_bootmem_node(NODE_DATA(1), __MEMORY_START_2ND, __MEMORY_SIZE_2ND);
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reserve_bootmem_node(NODE_DATA(1), __MEMORY_START_2ND, bootmap_size);
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#endif
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/*
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* Find the highest page frame number we have available
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*/
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max_pfn = PFN_DOWN(__pa(memory_end));
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/*
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* Determine low and high memory ranges:
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*/
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max_low_pfn = max_pfn;
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/*
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* Partially used pages are not usable - thus
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* we are rounding upwards:
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*/
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start_pfn = PFN_UP(__pa(_end));
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/*
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* Find a proper area for the bootmem bitmap. After this
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* bootstrap step all allocations (until the page allocator
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* is intact) must be done via bootmem_alloc().
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*/
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bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
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__MEMORY_START>>PAGE_SHIFT,
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max_low_pfn);
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/*
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* Register fully available low RAM pages with the bootmem allocator.
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*/
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{
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unsigned long curr_pfn, last_pfn, pages;
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/*
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* We are rounding up the start address of usable memory:
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*/
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curr_pfn = PFN_UP(__MEMORY_START);
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/*
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* ... and at the end of the usable range downwards:
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*/
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last_pfn = PFN_DOWN(__pa(memory_end));
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if (last_pfn > max_low_pfn)
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last_pfn = max_low_pfn;
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pages = last_pfn - curr_pfn;
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free_bootmem_node(NODE_DATA(0), PFN_PHYS(curr_pfn),
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PFN_PHYS(pages));
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}
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/*
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* Reserve the kernel text and
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* Reserve the bootmem bitmap. We do this in two steps (first step
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* was init_bootmem()), because this catches the (definitely buggy)
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* case of us accidentally initializing the bootmem allocator with
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* an invalid RAM area.
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*/
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reserve_bootmem_node(NODE_DATA(0), __MEMORY_START+PAGE_SIZE,
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(PFN_PHYS(start_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START);
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/*
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* reserve physical page 0 - it's a special BIOS page on many boxes,
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* enabling clean reboots, SMP operation, laptop functions.
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*/
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reserve_bootmem_node(NODE_DATA(0), __MEMORY_START, PAGE_SIZE);
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#ifdef CONFIG_BLK_DEV_INITRD
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ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
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if (&__rd_start != &__rd_end) {
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LOADER_TYPE = 1;
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INITRD_START = PHYSADDR((unsigned long)&__rd_start) - __MEMORY_START;
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INITRD_SIZE = (unsigned long)&__rd_end - (unsigned long)&__rd_start;
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}
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if (LOADER_TYPE && INITRD_START) {
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if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {
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reserve_bootmem_node(NODE_DATA(0), INITRD_START+__MEMORY_START, INITRD_SIZE);
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initrd_start =
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INITRD_START ? INITRD_START + PAGE_OFFSET + __MEMORY_START : 0;
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initrd_end = initrd_start + INITRD_SIZE;
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} else {
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printk("initrd extends beyond end of memory "
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"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
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INITRD_START + INITRD_SIZE,
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max_low_pfn << PAGE_SHIFT);
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initrd_start = 0;
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}
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}
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#endif
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#ifdef CONFIG_DUMMY_CONSOLE
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conswitchp = &dummy_con;
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#endif
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/* Perform the machine specific initialisation */
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platform_setup();
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paging_init();
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}
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struct sh_machine_vector* __init get_mv_byname(const char* name)
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{
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extern int strcasecmp(const char *, const char *);
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extern long __machvec_start, __machvec_end;
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struct sh_machine_vector *all_vecs =
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(struct sh_machine_vector *)&__machvec_start;
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int i, n = ((unsigned long)&__machvec_end
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- (unsigned long)&__machvec_start)/
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sizeof(struct sh_machine_vector);
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for (i = 0; i < n; ++i) {
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struct sh_machine_vector *mv = &all_vecs[i];
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if (mv == NULL)
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continue;
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if (strcasecmp(name, get_system_type()) == 0) {
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return mv;
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}
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}
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return NULL;
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}
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static struct cpu cpu[NR_CPUS];
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static int __init topology_init(void)
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{
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int cpu_id;
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for (cpu_id = 0; cpu_id < NR_CPUS; cpu_id++)
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if (cpu_possible(cpu_id))
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register_cpu(&cpu[cpu_id], cpu_id, NULL);
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return 0;
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}
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subsys_initcall(topology_init);
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static const char *cpu_name[] = {
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[CPU_SH7604] = "SH7604",
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[CPU_SH7705] = "SH7705",
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[CPU_SH7708] = "SH7708",
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[CPU_SH7729] = "SH7729",
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[CPU_SH7300] = "SH7300",
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[CPU_SH7750] = "SH7750",
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[CPU_SH7750S] = "SH7750S",
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[CPU_SH7750R] = "SH7750R",
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[CPU_SH7751] = "SH7751",
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[CPU_SH7751R] = "SH7751R",
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[CPU_SH7760] = "SH7760",
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[CPU_SH73180] = "SH73180",
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[CPU_ST40RA] = "ST40RA",
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[CPU_ST40GX1] = "ST40GX1",
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[CPU_SH4_202] = "SH4-202",
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[CPU_SH4_501] = "SH4-501",
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[CPU_SH_NONE] = "Unknown"
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};
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const char *get_cpu_subtype(void)
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{
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return cpu_name[boot_cpu_data.type];
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}
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#ifdef CONFIG_PROC_FS
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static const char *cpu_flags[] = {
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"none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr",
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};
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static void show_cpuflags(struct seq_file *m)
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{
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unsigned long i;
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seq_printf(m, "cpu flags\t:");
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if (!cpu_data->flags) {
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seq_printf(m, " %s\n", cpu_flags[0]);
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return;
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}
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for (i = 0; i < cpu_data->flags; i++)
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if ((cpu_data->flags & (1 << i)))
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seq_printf(m, " %s", cpu_flags[i+1]);
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seq_printf(m, "\n");
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}
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static void show_cacheinfo(struct seq_file *m, const char *type, struct cache_info info)
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{
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unsigned int cache_size;
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cache_size = info.ways * info.sets * info.linesz;
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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 */
|
|
|