patch-2.4.5 linux/arch/ppc/treeboot/main.c

• Lines: 241
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.4/linux/arch/ppc/treeboot/main.c
• Orig date: Mon Jan 10 18:25:32 2000

diff -u --recursive --new-file v2.4.4/linux/arch/ppc/treeboot/main.c linux/arch/ppc/treeboot/main.c
@@ -1,240 +0,0 @@
-/*
- *    Copyright (c) 1997 Paul Mackerras <paulus@cs.anu.edu.au>
- *      Initial Power Macintosh COFF version.
- *    Copyright (c) 1999 Grant Erickson <grant@lcse.umn.edu>
- *      Modifications for an ELF-based IBM evaluation board version.
- *
- *    Module name: main.c
- *
- *    Description:
- *      This module does most of the real work for the boot loader. It
- *      checks the variables holding the absolute start address and size
- *      of the Linux kernel "image" and initial RAM disk "initrd" sections
- *      and if they are present, moves them to their "proper" locations.
- *
- *      For the Linux kernel, "proper" is physical address 0x00000000.
- *      For the RAM disk, "proper" is the image's size below the top
- *      of physical memory. The Linux kernel may be in either raw
- *      binary form or compressed with GNU zip (aka gzip).
- *
- *    This program is free software; you can redistribute it and/or
- *    modify it under the terms of the GNU General Public License 
- *    as published by the Free Software Foundation; either version
- *    2 of the License, or (at your option) any later version.
- *
- */
-
-#include <asm/board.h>
-
-#include "../coffboot/nonstdio.h"
-#include "../coffboot/zlib.h"
-#include "irSect.h"
-
-
-/* Preprocessor Defines */
-
-/*
- * Location of the IBM boot ROM function pointer address for retrieving
- * the board information structure.
- */
-
-#define	BOARD_INFO_VECTOR	0xFFFE0B50
-
-#define	RAM_SIZE	(4 * 1024 * 1024)
-
-#define	RAM_PBASE	0x00000000
-#define	RAM_PEND	(RAM_PBASE + RAM_SIZE)
-
-#define	RAM_VBASE	0xC0000000
-#define	RAM_VEND	(RAM_VBASE + RAM_SIZE)
-
-#define	RAM_START	RAM_PBASE
-#define	RAM_END		RAM_PEND
-#define	RAM_FREE	(imageSect_start + imageSect_size + initrdSect_size)
-
-#define	PROG_START	RAM_START
-
-
-/* Function Macros */
-
-#define	ALIGN_UP(x, align)	(((x) + ((align) - 1)) & ~((align) - 1))
-
-
-/* Global Variables */
-
-/* Needed by zalloc and zfree for allocating memory */
-
-char *avail_ram;	/* Indicates start of RAM available for heap */
-char *end_avail;	/* Indicates end of RAM available for heap */
-
-bd_t	board_info;
-
-/*
- * XXX - Until either the IBM boot ROM provides a way of passing arguments to
- *       the program it launches or until I/O is working in the boot loader,
- *       this is a good spot to pass in command line arguments to the kernel
- *       (e.g. console=tty0).
- */
-
-static char *cmdline = "";
-
-
-/* Function Prototypes */
-
-void *zalloc(void *x, unsigned items, unsigned size);
-void zfree(void *x, void *addr, unsigned nb);
-
-void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp);
-
-void printf () {}
-void pause () {}
-void exit () {}
-
-
-void start(void)
-{
-    void *options;
-    int ns, oh, i;
-    unsigned long sa, len;
-    void *dst;
-    unsigned char *im;
-    unsigned long initrd_start, initrd_size;
-    bd_t *(*get_board_info)(void) = 
-	    (bd_t *(*)(void))(*(unsigned long *)BOARD_INFO_VECTOR);
-    bd_t *bip = NULL;
-
-    if ((bip = get_board_info()) != NULL)
-	    memcpy(&board_info, bip, sizeof(bd_t));
-
-    /* setup_bats(RAM_START); */
-
-    /* Init RAM disk (initrd) section */
-
-    if (initrdSect_start != 0 && (initrd_size = initrdSect_size) != 0) {
-        initrd_start = (RAM_END - initrd_size) & ~0xFFF;
-
-	printf("Initial RAM disk at 0x%08x (%u bytes)\n",
-	       initrd_start, initrd_size);
-
-	memcpy((char *)initrd_start,
-	       (char *)(initrdSect_start),
-	       initrdSect_size);
-
-	end_avail = (char *)initrd_start;
-    } else {
-	initrd_start = initrd_size = 0;
-	end_avail = (char *)RAM_END;
-    }
-
-    /* Linux kernel image section */
-	
-    im = (unsigned char *)(imageSect_start);
-    len = imageSect_size;
-    dst = (void *)PROG_START;
-
-    /* Check for the gzip archive magic numbers */
-
-    if (im[0] == 0x1f && im[1] == 0x8b) {
-
-        /* The gunzip routine needs everything nice and aligned */
-
-	void *cp = (void *)ALIGN_UP(RAM_FREE, 8);
-	avail_ram = (void *)(cp + ALIGN_UP(len, 8));
-	memcpy(cp, im, len);
-
-	/* I'm not sure what the 0x200000 parameter is for, but it works. */
-
-	gunzip(dst, 0x200000, cp, (int *)&len);
-    } else {
-	memmove(dst, im, len);
-    }
-
-    flush_cache(dst, len);
-
-    sa = (unsigned long)dst;
-
-    (*(void (*)())sa)(&board_info,
-		      initrd_start,
-		      initrd_start + initrd_size,
-		      cmdline,
-		      cmdline + strlen(cmdline));
-
-    pause();
-}
-
-void *zalloc(void *x, unsigned items, unsigned size)
-{
-    void *p = avail_ram;
-
-    size *= items;
-    size = ALIGN_UP(size, 8);
-    avail_ram += size;
-    if (avail_ram > end_avail) {
-	printf("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) {
-	printf("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) {
-	printf("gunzip: ran out of data in header\n");
-	exit();
-    }
-    printf("done 1\n");
-    s.zalloc = zalloc;
-    s.zfree = zfree;
-    r = inflateInit2(&s, -MAX_WBITS);
-    if (r != Z_OK) {
-	printf("inflateInit2 returned %d\n", r);
-	exit();
-    }
-    s.next_in = src + i;
-    s.avail_in = *lenp - i;
-    s.next_out = dst;
-    s.avail_out = dstlen;
-    printf("doing inflate\n");
-    r = inflate(&s, Z_FINISH);
-    printf("done inflate\n");
-    if (r != Z_OK && r != Z_STREAM_END) {
-	printf("inflate returned %d\n", r);
-	exit();
-    }
-    *lenp = s.next_out - (unsigned char *) dst;
-    printf("doing end\n");
-    inflateEnd(&s);
-}