patch-2.4.19 linux-2.4.19/arch/ppc/boot/tree/main.c

• Lines: 213
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.18/arch/ppc/boot/tree/main.c
• Orig date: Mon Jul 2 14:34:57 2001

diff -urN linux-2.4.18/arch/ppc/boot/tree/main.c linux-2.4.19/arch/ppc/boot/tree/main.c
@@ -1,212 +0,0 @@
-/*
- * BK Id: SCCS/s.main.c 1.9 06/15/01 13:16:10 paulus
- */
-/*
- *    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.
- *    Copyright 2000-2001 MontaVista Software Inc.
- *	PPC405GP modifications
- * 	Author: MontaVista Software, Inc.
- *         	frank_rowand@mvista.com or source@mvista.com
- * 	   	debbie_chu@mvista.com
- *
- *    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 <linux/config.h>
-#include <asm/ppc4xx.h>
-
-#include "nonstdio.h"
-#include "irSect.h"
-#if defined(CONFIG_SERIAL_CONSOLE)
-#include "ns16550.h"
-#endif /* CONFIG_SERIAL_CONSOLE */
-
-
-/* Preprocessor Defines */
-
-/*
- * Location of the IBM boot ROM function pointer address for retrieving
- * the board information structure.
- */
-
-#define	BOARD_INFO_VECTOR	0xFFFE0B50
-
-/* 
- * Warning: the board_info doesn't contain valid data until get_board_info() 
- * 	    gets called in start().
- */
-#define RAM_SIZE        board_info.bi_memsize 
-
-#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 */
-
-/* Needed for serial I/O.
-*/
-extern unsigned long *com_port;
-
-bd_t	board_info;
-
-/*
-** The bootrom may change bootrom_cmdline to point to a buffer in the
-** bootrom.
-*/
-char *bootrom_cmdline = "";
-char treeboot_bootrom_cmdline[512];
-
-#ifdef CONFIG_CMDLINE
-char *cmdline = CONFIG_CMDLINE;
-#else
-char *cmdline = "";
-#endif
-
-/* Function Prototypes */
-
-extern void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp);
-
-void
-kick_watchdog(void)
-{
-#ifdef CONFIG_405GP
-    mtspr(SPRN_TSR, (TSR_ENW | TSR_WIS));
-#endif
-}
-
-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;
-
-
-    com_port = (struct NS16550 *)serial_init(0);
-
-#ifdef CONFIG_405GP
-    /* turn off on-chip ethernet */
-    /* This is to fix a problem with early walnut bootrom. */
- 
-    {
-	/* Physical mapping of ethernet register space. */
-	static struct   ppc405_enet_regs *ppc405_enet_regp =
-	(struct ppc405_enet_regs *)PPC405_EM0_REG_ADDR;
-
-	mtdcr(DCRN_MALCR, MALCR_MMSR);                /* 1st reset MAL */
-
-	while (mfdcr(DCRN_MALCR) & MALCR_MMSR) {};    /* wait for the reset */
-    
-	ppc405_enet_regp->em0mr0 = 0x20000000;        /* then reset EMAC */
-    }
-#endif
-
-    if ((bip = get_board_info()) != NULL)
-	    memcpy(&board_info, bip, sizeof(bd_t));
-
-    /* Init RAM disk (initrd) section */
-
-    kick_watchdog();
-
-    if (initrdSect_start != 0 && (initrd_size = initrdSect_size) != 0) {
-        initrd_start = (RAM_END - initrd_size) & ~0xFFF;
-
-	_printk("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 */
-	
-    kick_watchdog();
-
-    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));	/* used by zalloc() */
-	memcpy(cp, im, len);
-
-	/* I'm not sure what the 0x200000 parameter is for, but it works. */
-	/* It tells gzip the end of the area you wish to reserve, and it
-	 * can use data past that point....unfortunately, this value
-	 * isn't big enough (luck ran out).  -- Dan
-	 */
-
-	gunzip(dst, 0x400000, cp, (int *)&len);
-    } else {
-	memmove(dst, im, len);
-    }
-
-    kick_watchdog();
-
-    flush_cache(dst, len);
-
-    sa = (unsigned long)dst;
-
-    (*(void (*)())sa)(&board_info,
-		      initrd_start,
-		      initrd_start + initrd_size,
-		      cmdline,
-		      cmdline + strlen(cmdline));
-
-    pause();
-}