Viewing file:  setup.c (14.61 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* $Id: setup.c,v 1.31 2001/08/23 16:36:40 dwmw2 Exp $
*
* linux/arch/sh/kernel/setup.c
*
* Copyright (C) 1999 Niibe Yutaka
*
*/
/*
* This file handles the architecture-dependent parts of initialization
*/
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/config.h>
#include <linux/init.h>
#ifdef CONFIG_BLK_DEV_RAM
#include <linux/blk.h>
#endif
#include <linux/bootmem.h>
#include <linux/console.h>
#include <linux/ctype.h>
#include <linux/seq_file.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/io_generic.h>
#include <asm/machvec.h>
#ifdef CONFIG_SH_EARLY_PRINTK
#include <asm/sh_bios.h>
#endif
/*
* 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;
unsigned char aux_device_present = 0xaa;
#if defined(CONFIG_SH_GENERIC) || 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 fpu_init(void);
extern int root_mountflags;
extern int _text, _etext, _edata, _end;
#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 COMMAND_LINE_SIZE 256
#define RAMDISK_IMAGE_START_MASK 0x07FF
#define RAMDISK_PROMPT_FLAG 0x8000
#define RAMDISK_LOAD_FLAG 0x4000
static char command_line[COMMAND_LINE_SIZE] = { 0, };
char saved_command_line[COMMAND_LINE_SIZE];
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;
#ifdef CONFIG_SH_EARLY_PRINTK
/*
* Print a string through the BIOS
*/
static void sh_console_write(struct console *co, const char *s,
unsigned count)
{
sh_bios_console_write(s, count);
}
/*
* Receive character from the serial port
*/
static int sh_console_wait_key(struct console *co)
{
/* Not implemented yet */
return 0;
}
static kdev_t sh_console_device(struct console *c)
{
/* TODO: this is totally bogus */
/* return MKDEV(SCI_MAJOR, SCI_MINOR_START + c->index); */
return 0;
}
/*
* Setup initial baud/bits/parity. We do two things here:
* - construct a cflag setting for the first rs_open()
* - initialize the serial port
* Return non-zero if we didn't find a serial port.
*/
static int __init sh_console_setup(struct console *co, char *options)
{
int cflag = CREAD | HUPCL | CLOCAL;
/*
* Now construct a cflag setting.
* TODO: this is a totally bogus cflag, as we have
* no idea what serial settings the BIOS is using, or
* even if its using the serial port at all.
*/
cflag |= B115200 | CS8 | /*no parity*/0;
co->cflag = cflag;
return 0;
}
static struct console sh_console = {
name: "bios",
write: sh_console_write,
device: sh_console_device,
wait_key: sh_console_wait_key,
setup: sh_console_setup,
flags: CON_PRINTBUFFER,
index: -1,
};
void sh_console_init(void)
{
register_console(&sh_console);
}
void sh_console_unregister(void)
{
unregister_console(&sh_console);
}
#endif
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;
}
void __init setup_arch(char **cmdline_p)
{
#if defined(CONFIG_SH_GENERIC) || 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;
unsigned long bootmap_size;
unsigned long start_pfn, max_pfn, max_low_pfn;
#ifdef CONFIG_SH_EARLY_PRINTK
sh_console_init();
#endif
ROOT_DEV = to_kdev_t(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;
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
#if defined(CONFIG_SH_GENERIC) || defined(CONFIG_SH_UNKNOWN)
if (mv_io_base != 0) {
sh_mv.mv_inb = generic_inb;
sh_mv.mv_inw = generic_inw;
sh_mv.mv_inl = generic_inl;
sh_mv.mv_outb = generic_outb;
sh_mv.mv_outw = generic_outw;
sh_mv.mv_outl = generic_outl;
sh_mv.mv_inb_p = generic_inb_p;
sh_mv.mv_inw_p = generic_inw_p;
sh_mv.mv_inl_p = generic_inl_p;
sh_mv.mv_outb_p = generic_outb_p;
sh_mv.mv_outw_p = generic_outw_p;
sh_mv.mv_outl_p = generic_outl_p;
sh_mv.mv_insb = generic_insb;
sh_mv.mv_insw = generic_insw;
sh_mv.mv_insl = generic_insl;
sh_mv.mv_outsb = generic_outsb;
sh_mv.mv_outsw = generic_outsw;
sh_mv.mv_outsl = generic_outsl;
sh_mv.mv_isa_port2addr = generic_isa_port2addr;
generic_io_base = mv_io_base;
}
if (mv_mmio_enable != 0) {
sh_mv.mv_readb = generic_readb;
sh_mv.mv_readw = generic_readw;
sh_mv.mv_readl = generic_readl;
sh_mv.mv_writeb = generic_writeb;
sh_mv.mv_writew = generic_writew;
sh_mv.mv_writel = generic_writel;
}
#endif
#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
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
#if 0
/*
* Request the standard RAM and ROM resources -
* they eat up PCI memory space
*/
request_resource(&iomem_resource, ram_resources+0);
request_resource(&iomem_resource, ram_resources+1);
request_resource(&iomem_resource, ram_resources+2);
request_resource(ram_resources+1, &code_resource);
request_resource(ram_resources+1, &data_resource);
probe_roms();
/* request I/O space for devices used on all i[345]86 PCs */
for (i = 0; i < STANDARD_IO_RESOURCES; i++)
request_resource(&ioport_resource, standard_io_resources+i);
#endif
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
conswitchp = &dummy_con;
#endif
#endif
/* Perform the machine specific initialisation */
if (sh_mv.mv_init_arch != NULL) {
sh_mv.mv_init_arch();
}
#if defined(__SH4__)
/* We already grab/initialized FPU in head.S. Make it consisitent. */
init_task.used_math = 1;
init_task.flags |= PF_USEDFPU;
#endif
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, mv->mv_name) == 0) {
return mv;
}
}
return NULL;
}
/*
* Get CPU information for use by the procfs.
*/
#ifdef CONFIG_PROC_FS
static int show_cpuinfo(struct seq_file *m, void *v)
{
#if defined(__sh3__)
seq_printf(m, "cpu family\t: SH-3\n"
"cache size\t: 8K-byte\n");
#elif defined(__SH4__)
seq_printf(m, "cpu family\t: SH-4\n"
"cache size\t: 8K-byte/16K-byte\n");
#endif
seq_printf(m, "bogomips\t: %lu.%02lu\n\n",
loops_per_jiffy/(500000/HZ),
(loops_per_jiffy/(5000/HZ)) % 100);
seq_printf(m, "Machine: %s\n", sh_mv.mv_name);
#define PRINT_CLOCK(name, value) \
seq_printf(m, name " clock: %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("Peripheral module", boot_cpu_data.module_clock);
return 0;
}
static void *c_start(struct seq_file *m, loff_t *pos)
{
return (void*)(*pos == 0);
}
static void *c_next(struct seq_file *m, void *v, loff_t *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: show_cpuinfo,
};
#endif
|