patch-2.4.19 linux-2.4.19/arch/ppc/boot/mbx/misc.c

• Lines: 249
• Date: Wed Dec 31 16:00:00 1969
• Orig file: linux-2.4.18/arch/ppc/boot/mbx/misc.c
• Orig date: Mon Feb 25 11:37:55 2002

diff -urN linux-2.4.18/arch/ppc/boot/mbx/misc.c linux-2.4.19/arch/ppc/boot/mbx/misc.c
@@ -1,248 +0,0 @@
-/*
- * BK Id: SCCS/s.misc.c 1.15 10/15/01 10:53:29 trini
- */
-/*
- * 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/config.h>
-#include <linux/types.h>
-#include "zlib.h"
-#include <asm/residual.h>
-#include <linux/elf.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
-
-#include "nonstdio.h"
-
-/*
- * 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;
-
-/* 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;
-
-/* We need to pass along a 'dummy' com_port. */
-unsigned long com_port = 0;
-
-/* This is the default cmdline that will be given to the user at boot time..
- * If none was specified at compile time, we'll give it one that should work.
- * -- Tom */
-#ifdef CONFIG_CMDLINE_BOOL
-char	compiled_string[] = CONFIG_CMDLINE;
-#endif
-char	ramroot_string[] = "root=/dev/ram";
-char	netroot_string[] = "root=/dev/nfs rw";
-
-bd_t hold_resid_buf;
-bd_t *hold_residual = &hold_resid_buf;
-unsigned long initrd_start = 0, initrd_end = 0;
-char *zimage_start;
-
-extern void gunzip(void *, int, unsigned char *, int *);
-
-unsigned long
-decompress_kernel(unsigned long load_addr, int num_words, unsigned long cksum, bd_t *bp)
-{
-	int timer, zimage_size = ZIMAGE_SIZE;
-	extern unsigned long start;
-	char *cp, ch;
-
-#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
-
-	/* 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);
-
-	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;
-	/* This is where we try and pick the right command line for booting.
-	 * If we were given one at compile time, use it.  It Is Right.
-	 * If we weren't, see if we have a ramdisk.  If so, thats root.
-	 * When in doubt, give them the netroot (root=/dev/nfs rw) -- Tom */
-#ifdef CONFIG_CMDLINE_BOOL
-	memcpy (cmd_line, compiled_string, sizeof(compiled_string));
-#else
-	if (initrd_start)
-		memcpy (cmd_line, ramroot_string, sizeof(ramroot_string));
-	else
-		memcpy (cmd_line, netroot_string, sizeof(netroot_string));
-#endif
-	while ( *cp ) putc(*cp++);
-	while (timer++ < 5*1000) {
-		if (tstc()) {
-			while ((ch = getc()) != '\n' && ch != '\r') {
-				if (ch == '\b' || ch == '\177') {
-					if (cp != cmd_line) {
-						cp--;
-						puts("\b \b");
-					}
-				} else if (ch == '\030'		/* ^x */
-					   || ch == '\025') {	/* ^u */
-					while (cp != cmd_line) {
-						cp--;
-						puts("\b \b");
-					}
-				} else {
-					*cp++ = ch;
-					putc(ch);
-				}
-			}
-			break;  /* Exit 'timer' loop */
-		}
-		udelay(1000);  /* 1 msec */
-	}
-	*cp = 0;
-	puts("\nUncompressing Linux...");
-
-	gunzip(0, 0x400000, zimage_start, &zimage_size);
-	puts("done.\n");
-	puts("Now booting the kernel\n");
-	return (unsigned long)hold_residual;
-}