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* misc.c
*
* Adapted for PowerPC by Gary Thomas
*
* Rewritten by Cort Dougan (cort@cs.nmt.edu)
* One day to be replaced by a single bootloader for chrp/prep/pmac. -- Cort
*/
#include "../coffboot/zlib.h"
#include "asm/residual.h"
#include <elf.h>
#include <linux/config.h>
#include <asm/page.h>
#ifdef CONFIG_MBX
#include <asm/mbx.h>
bd_t hold_board_info;
#endif
/*
* MBX: loads at: 0x00200000
* board data at: end of ram
* PREP:
* powerstack 1:
* network load at: configurable - should set to link addr-0x400
* exec. addr set to link addr
* such as load: 0x005ffc00 exec 0x00600000
* hd/floppy/tape load at:
* powerstack 2:
* loads at: 0x00400000
* IBM 830 (carolina):
* loads at: ???
*
* Please send me load/board info and such data for hardware not
* listed here so I can keep track since things are getting tricky
* with the different load addrs with different firmware. This will
* help to avoid breaking the load/boot process.
* -- Cort
*/
char *avail_ram;
char *end_avail;
char cmd_line[256];
RESIDUAL hold_residual;
unsigned long initrd_start = 0, initrd_end = 0;
char *zimage_start;
int zimage_size;
char *vidmem = (char *)0xC00B8000;
int lines, cols;
int orig_x, orig_y;
void puts(const char *);
void putc(const char c);
void puthex(unsigned long val);
void _bcopy(char *src, char *dst, int len);
void * memcpy(void * __dest, __const void * __src,
int __n);
void gunzip(void *, int, unsigned char *, int *);
void pause()
{
puts("pause\n");
}
void exit()
{
puts("exit\n");
while(1);
}
#ifndef CONFIG_MBX
static void clear_screen()
{
int i, j;
for (i = 0; i < lines; i++) {
for (j = 0; j < cols; j++) {
vidmem[((i*cols)+j)*2] = ' ';
vidmem[((i*cols)+j)*2+1] = 0x07;
}
}
}
static void scroll()
{
int i;
memcpy ( vidmem, vidmem + cols * 2, ( lines - 1 ) * cols * 2 );
for ( i = ( lines - 1 ) * cols * 2; i < lines * cols * 2; i += 2 )
vidmem[i] = ' ';
}
tstc(void)
{
return (CRT_tstc() );
}
getc(void)
{
while (1) {
if (CRT_tstc()) return (CRT_getc());
}
}
void
putc(const char c)
{
int x,y;
x = orig_x;
y = orig_y;
if ( c == '\n' ) {
x = 0;
if ( ++y >= lines ) {
scroll();
y--;
}
} else if (c == '\b') {
if (x > 0) {
x--;
}
} else {
vidmem [ ( x + cols * y ) * 2 ] = c;
if ( ++x >= cols ) {
x = 0;
if ( ++y >= lines ) {
scroll();
y--;
}
}
}
cursor(x, y);
orig_x = x;
orig_y = y;
}
void puts(const char *s)
{
int x,y;
char c;
x = orig_x;
y = orig_y;
while ( ( c = *s++ ) != '\0' ) {
if ( c == '\n' ) {
x = 0;
if ( ++y >= lines ) {
scroll();
y--;
}
} else {
vidmem [ ( x + cols * y ) * 2 ] = c;
if ( ++x >= cols ) {
x = 0;
if ( ++y >= lines ) {
scroll();
y--;
}
}
}
}
orig_x = x;
orig_y = y;
}
#else
/* The MBX is just the serial port.
*/
tstc(void)
{
return (serial_tstc());
}
getc(void)
{
while (1) {
if (serial_tstc()) return (serial_getc());
}
}
void
putc(const char c)
{
serial_putchar(c);
}
void puts(const char *s)
{
char c;
while ( ( c = *s++ ) != '\0' ) {
serial_putchar(c);
if ( c == '\n' )
serial_putchar('\r');
}
}
#endif /* CONFIG_MBX */
void * memcpy(void * __dest, __const void * __src,
int __n)
{
int i;
char *d = (char *)__dest, *s = (char *)__src;
for (i=0;i<__n;i++) d[i] = s[i];
}
int memcmp(__const void * __dest, __const void * __src,
int __n)
{
int i;
char *d = (char *)__dest, *s = (char *)__src;
for (i=0;i<__n;i++, d++, s++)
{
if (*d != *s)
{
return (*s - *d);
}
}
return (0);
}
void error(char *x)
{
puts("\n\n");
puts(x);
puts("\n\n -- System halted");
while(1); /* Halt */
}
void *zalloc(void *x, unsigned items, unsigned size)
{
void *p = avail_ram;
size *= items;
size = (size + 7) & -8;
avail_ram += size;
if (avail_ram > end_avail) {
puts("oops... out of memory\n");
pause();
}
return p;
}
void zfree(void *x, void *addr, unsigned nb)
{
}
#define HEAD_CRC 2
#define EXTRA_FIELD 4
#define ORIG_NAME 8
#define COMMENT 0x10
#define RESERVED 0xe0
#define DEFLATED 8
void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
{
z_stream s;
int r, i, flags;
/* skip header */
i = 10;
flags = src[3];
if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
puts("bad gzipped data\n");
exit();
}
if ((flags & EXTRA_FIELD) != 0)
i = 12 + src[10] + (src[11] << 8);
if ((flags & ORIG_NAME) != 0)
while (src[i++] != 0)
;
if ((flags & COMMENT) != 0)
while (src[i++] != 0)
;
if ((flags & HEAD_CRC) != 0)
i += 2;
if (i >= *lenp) {
puts("gunzip: ran out of data in header\n");
exit();
}
s.zalloc = zalloc;
s.zfree = zfree;
r = inflateInit2(&s, -MAX_WBITS);
if (r != Z_OK) {
puts("inflateInit2 returned %d\n");
exit();
}
s.next_in = src + i;
s.avail_in = *lenp - i;
s.next_out = dst;
s.avail_out = dstlen;
r = inflate(&s, Z_FINISH);
if (r != Z_OK && r != Z_STREAM_END) {
puts("inflate returned %d\n");
exit();
}
*lenp = s.next_out - (unsigned char *) dst;
inflateEnd(&s);
}
unsigned char sanity[0x2000];
unsigned long
decompress_kernel(unsigned long load_addr, int num_words, unsigned long cksum, RESIDUAL *residual)
{
int timer;
extern unsigned long start;
char *cp, ch;
unsigned long i;
lines = 25;
cols = 80;
orig_x = 0;
orig_y = 24;
#ifndef CONFIG_MBX
vga_init(0xC0000000);
/* copy the residual data */
if (residual)
memcpy(&hold_residual,residual,sizeof(RESIDUAL));
#else /* CONFIG_MBX */
/* copy board data */
if (residual)
_bcopy((char *)residual, (char *)&hold_board_info,
sizeof(hold_board_info));
#endif /* CONFIG_MBX */
/* MBX/prep put the board/residual data at the end of memory */
if ( residual )
end_avail = (char *)PAGE_ALIGN((unsigned long)residual);
/* prep netboot looses the residual */
else
end_avail = (char *)0x00800000;
puts("loaded at: "); puthex(load_addr);
puts(" "); puthex((unsigned long)(load_addr + (4*num_words))); puts("\n");
if ( (unsigned long)load_addr != (unsigned long)&start )
{
puts("relocated to: "); puthex((unsigned long)&start);
puts(" ");
puthex((unsigned long)((unsigned long)&start + (4*num_words)));
puts("\n");
}
if ( residual )
{
puts("board data at: "); puthex((unsigned long)residual);
puts(" ");
#ifdef CONFIG_MBX
puthex((unsigned long)((unsigned long)residual + sizeof(bd_t)));
#else
puthex((unsigned long)((unsigned long)residual + sizeof(RESIDUAL)));
#endif
puts("\n");
puts("relocated to: ");
#ifdef CONFIG_MBX
puthex((unsigned long)&hold_board_info);
#else
puthex((unsigned long)&hold_residual);
#endif
puts(" ");
#ifdef CONFIG_MBX
puthex((unsigned long)((unsigned long)&hold_board_info + sizeof(bd_t)));
#else
puthex((unsigned long)((unsigned long)&hold_residual + sizeof(RESIDUAL)));
#endif
puts("\n");
}
/* we have to subtract 0x10000 here to correct for objdump including the
size of the elf header which we strip -- Cort */
zimage_start = (char *)(load_addr - 0x10000 + ZIMAGE_OFFSET);
zimage_size = ZIMAGE_SIZE;
puts("zimage at: "); puthex((unsigned long)zimage_start);
puts(" "); puthex((unsigned long)(zimage_size+zimage_start)); puts("\n");
if ( INITRD_OFFSET )
initrd_start = load_addr - 0x10000 + INITRD_OFFSET;
else
initrd_start = 0;
initrd_end = INITRD_SIZE + initrd_start;
/*
* setup avail_ram - this is the first part of ram usable
* by the uncompress code. -- Cort
*/
avail_ram = (char *)PAGE_ALIGN((unsigned long)zimage_start+zimage_size);
if ( (load_addr+(num_words*4)) > (unsigned long) avail_ram )
avail_ram = (char *)(load_addr+(num_words*4));
if ( ((unsigned long)&start+(num_words*4)) > (unsigned long) avail_ram )
avail_ram = (char *)((unsigned long)&start+(num_words*4));
/* relocate initrd */
if ( initrd_start )
{
puts("initrd at: "); puthex(initrd_start);
puts(" "); puthex(initrd_end); puts("\n");
/*
* Memory is really tight on the MBX (we can assume 4M)
* so put the initrd at the TOP of ram, and set end_avail
* to right after that.
*
* I should do something like this for prep, too and keep
* a variable end_of_DRAM to keep track of what we think the
* max ram is.
* -- Cort
*/
memcpy ((void *)PAGE_ALIGN(-PAGE_SIZE+(unsigned long)end_avail-INITRD_SIZE),
(void *)initrd_start,
INITRD_SIZE );
initrd_start = PAGE_ALIGN(-PAGE_SIZE+(unsigned long)end_avail-INITRD_SIZE);
initrd_end = initrd_start + INITRD_SIZE;
end_avail = (char *)initrd_start;
puts("relocated to: "); puthex(initrd_start);
puts(" "); puthex(initrd_end); puts("\n");
}
puts("avail ram: "); puthex((unsigned long)avail_ram); puts(" ");
puthex((unsigned long)end_avail); puts("\n");
#ifndef CONFIG_MBX
CRT_tstc(); /* Forces keyboard to be initialized */
#endif
puts("\nLinux/PPC load: ");
timer = 0;
cp = cmd_line;
while (timer++ < 5*1000) {
if (tstc()) {
while ((ch = getc()) != '\n' && ch != '\r') {
if (ch == '\b') {
if (cp != cmd_line) {
cp--;
puts("\b \b");
}
} else {
*cp++ = ch;
putc(ch);
}
}
break; /* Exit 'timer' loop */
}
mdelay(1); /* 1 msec */
}
*cp = 0;
puts("\n");
/* mappings on early boot can only handle 16M */
if ( (int)(&cmd_line[0]) > (16<<20))
puts("cmd_line located > 16M\n");
if ( (int)&hold_residual > (16<<20))
puts("hold_residual located > 16M\n");
if ( initrd_start > (16<<20))
puts("initrd_start located > 16M\n");
puts("Uncompressing Linux...");
gunzip(0, 0x400000, zimage_start, &zimage_size);
puts("done.\n");
puts("Now booting the kernel\n");
#ifndef CONFIG_MBX
return (unsigned long)&hold_residual;
#else
return (unsigned long)&hold_board_info;
#endif
}
void puthex(unsigned long val)
{
unsigned char buf[10];
int i;
for (i = 7; i >= 0; i--)
{
buf[i] = "0123456789ABCDEF"[val & 0x0F];
val >>= 4;
}
buf[8] = '\0';
puts(buf);
}
/*
* PCI/ISA I/O support
*/
volatile unsigned char *ISA_io = (unsigned char *)0x80000000;
volatile unsigned char *ISA_mem = (unsigned char *)0xC0000000;
void
outb(int port, char val)
{
/* Ensure I/O operations complete */
__asm__ volatile("eieio");
ISA_io[port] = val;
}
unsigned char
inb(int port)
{
/* Ensure I/O operations complete */
__asm__ volatile("eieio");
return (ISA_io[port]);
}
unsigned long
local_to_PCI(unsigned long addr)
{
return ((addr & 0x7FFFFFFF) | 0x80000000);
}
void
_bcopy(char *src, char *dst, int len)
{
while (len--) *dst++ = *src++;
}
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