patch-2.4.5 linux/arch/ppc/mbxboot/misc.c

• Lines: 477
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.4/linux/arch/ppc/mbxboot/misc.c
• Orig date: Sun Sep 17 09:48:07 2000

diff -u --recursive --new-file v2.4.4/linux/arch/ppc/mbxboot/misc.c linux/arch/ppc/mbxboot/misc.c
@@ -1,476 +0,0 @@
-/*
- * misc.c
- *
- * $Id: misc.c,v 1.2 1999/09/14 05:55:29 dmalek Exp $
- * 
- * 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 <linux/types.h>
-#include "../coffboot/zlib.h"
-#include "asm/residual.h"
-#include <linux/elf.h>
-#include <linux/config.h>
-#include <asm/page.h>
-#include <asm/processor.h>
-#include <asm/mmu.h>
-#ifdef CONFIG_8xx
-#include <asm/mpc8xx.h>
-#endif
-#ifdef CONFIG_8260
-#include <asm/mpc8260.h>
-#endif
-
-/*
- * The following references are needed to cause the linker to pull in the
- * gzimage.o and rdimage.o files.  These object files are special,
- * since they get placed into the .gzimage and .rdimage ELF sections 
- * of the zvmlinux and zvmlinux.initrd files.
- */
-extern char dummy_for_gzimage;
-extern char dummy_for_rdimage;
-
-/*
- * 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;
-
-/* See comment below.....
-*/
-unsigned int initrd_offset, initrd_size;
-
-/* Because of the limited amount of memory on embedded, it presents
- * loading problems.  The biggest is that we load this boot program
- * into a relatively low memory address, and the Linux kernel Bss often
- * extends into this space when it get loaded.  When the kernel starts
- * and zeros the BSS space, it also writes over the information we
- * save here and pass to the kernel (command line and board info).
- * On these boards, we grab some known memory holes to hold this information.
- */
-char	cmd_buf[256];
-char	*cmd_line = cmd_buf;
-
-char	*root_string = "root=/dev/nfs rw";
-char	*nfsaddrs_string = "nfsaddrs=";
-char	*nfsroot_string = "nfsroot=";
-char	*defroot_string = "/sys/mbxroot";
-char	*ramroot_string = "root=/dev/ram";
-int	do_ipaddrs(char **cmd_cp, int echo);
-void	do_nfsroot(char **cmd_cp, char *dp);
-int	strncmp(const char * cs,const char * ct,size_t count);
-char	*strrchr(const char * s, int c);
-
-bd_t hold_resid_buf;
-bd_t *hold_residual = &hold_resid_buf;
-unsigned long initrd_start = 0, initrd_end = 0;
-char *zimage_start;
-int zimage_size;
-
-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); 
-}
-
-/* The MPC8xx 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');
-        }
-}
-
-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 ");
-		puthex(r);
-		puts("\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, bd_t *bp)
-{
-	int timer;
-	extern unsigned long start;
-	char *cp, ch;
-	unsigned long i;
-	char	*dp;
-
-#ifdef CONFIG_8260
-	/* I don't know why I didn't do it this way on the 8xx.......
-	*/
-	embed_config(bp);
-	serial_init(bp);
-#endif
-
-	/* These values must be variables.  If not, the compiler optimizer
-	 * will remove some code, causing the size of the code to vary
-	 * when these values are zero.  This is bad because we first
-	 * compile with these zero to determine the size and offsets
-	 * in an image, than compile again with these set to the proper
-	 * discovered value.....Ya know, we used to read these from the
-	 * header a long time ago.....
-	 */
-	initrd_offset = INITRD_OFFSET;
-	initrd_size = INITRD_SIZE;
-
-	/* Grab some space for the command line and board info.  Since
-	 * we no longer use the ELF header, but it was loaded, grab
-	 * that space.
-	 */
-#ifdef CONFIG_MBX
-	cmd_line = (char *)(load_addr - 0x10000);
-
-	/* To be like everyone else, we need one too, although this
-	 * board information is passed from the boot rom.
-	 */
-	bp->bi_baudrate = 9600;
-#else
-	cmd_line = (char *)(0x200000);
-#endif
-	hold_residual = (bd_t *)(cmd_line + sizeof(cmd_buf));
-	/* copy board data */
-	if (bp)
-		memcpy(hold_residual,bp,sizeof(bd_t));
-
-	/* Set end of memory available to us.  It is always the highest
-	 * memory address provided by the board information.
-	 */
-	end_avail = (char *)(bp->bi_memsize);
-
-	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 ( bp )
-	{
-		puts("board data at: "); puthex((unsigned long)bp);
-		puts(" ");
-		puthex((unsigned long)((unsigned long)bp + sizeof(bd_t)));
-		puts("\n");
-		puts("relocated to:  ");
-		puthex((unsigned long)hold_residual);
-		puts(" ");
-		puthex((unsigned long)((unsigned long)hold_residual + sizeof(bd_t)));
-		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;
-
-	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)
-		&& (load_addr <= 0x01000000) )
-		avail_ram = (char *)(load_addr+(num_words*4));
-	if ( (((unsigned long)&start+(num_words*4)) > (unsigned long) avail_ram)
-		&& (load_addr <= 0x01000000) )
-		avail_ram = (char *)((unsigned long)&start+(num_words*4));
-	
-	/* relocate zimage */
-	puts("zimage at:     "); puthex((unsigned long)zimage_start);
-	puts(" "); puthex((unsigned long)(zimage_size+zimage_start)); puts("\n");
-	/*
-	 * There is no reason (yet) to relocate zImage for embedded boards.
-	 * To support boot from flash rom on 8xx embedded boards, I
-	 * assume if zimage start is over 16M we are booting from flash.
-	 * In this case, avilable ram will start just above the space we
-	 * have allocated for the command buffer and board information.
-	 */
-	if ((unsigned long)zimage_start > 0x01000000)
-		avail_ram = (char *)PAGE_ALIGN((unsigned long)hold_residual + sizeof(bd_t));
-
-	/* relocate initrd */
-	if ( initrd_start )
-	{
-		puts("initrd at:     "); puthex(initrd_start);
-		puts(" "); puthex(initrd_end); puts("\n");
-
-		/* We only have to relocate initrd if we find it is in Flash
-		 * rom.  This is because the kernel thinks it can toss the
-		 * pages into the free memory pool after it is done.  Use
-		 * the same 16M test.
-		 */
-		if ((unsigned long)initrd_start > 0x01000000) {
-			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");
-		}
-		else {
-			avail_ram = (char *)PAGE_ALIGN((unsigned long)initrd_end);
-		}
-	}
-
-
-	puts("avail ram:     "); puthex((unsigned long)avail_ram); puts(" ");
-	puthex((unsigned long)end_avail); puts("\n");
-
-	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 */
-		}
-		udelay(1000);  /* 1 msec */
-	}
-	*cp = 0;
-
-	/* If the command line is not filled in, we will automatically
-	 * create the default boot.
-	 */
-	if (cmd_line[0] == 0) {
-
-		/* An initrd on these boards means we booted from Flash
-		 * ROM and want to use the ramdisk as the root file system.
-		 * Otherwise, we perform a diskless NFS boot.
-		 */
-		if (initrd_start)
-			dp = ramroot_string;
-		else
-			dp = root_string;
-		while (*dp != 0)
-			*cp++ = *dp++;
-		*cp = 0;
-	}
-
-	puts("\n");
-
-	puts("Uncompressing Linux...");
-
-	gunzip(0, 0x400000, zimage_start, &zimage_size);
-	puts("done.\n");
-	puts("Now booting the kernel\n");
-	return (unsigned long)hold_residual;
-}
-
-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++;
-}