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MIPS: Clean up arch/mips/boot/compressed/decompress.c 

- Remove several outdated comments
- Clearify the definition of zimage_start and zimage_size and the their
  usage

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1382/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Wu Zhangjin 2010-06-16 15:52:20 +08:00 committed by Ralf Baechle
parent bdbffd9b8d
commit 1e1a77d698
1 changed files with 13 additions and 23 deletions
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36
arch/mips/boot/compressed/decompress.c
View File

@ -1,9 +1,6 @@
/*
* Misc. bootloader code for many machines.
*
* Copyright 2001 MontaVista Software Inc.
* Author: Matt Porter <mporter@mvista.com> Derived from
* arch/ppc/boot/prep/misc.c
* Author: Matt Porter <mporter@mvista.com>
*
* Copyright (C) 2009 Lemote, Inc.
* Author: Wu Zhangjin <wuzhangjin@gmail.com>
@ -19,12 +16,12 @@
#include <asm/addrspace.h>
/* These two variables specify the free mem region
/*
* These two variables specify the free mem region
* that can be used for temporary malloc area
*/
unsigned long free_mem_ptr;
unsigned long free_mem_end_ptr;
char *zimage_start;
/* The linker tells us where the image is. */
extern unsigned char __image_begin, __image_end;
@ -83,38 +80,31 @@ void *memset(void *s, int c, size_t n)
void decompress_kernel(unsigned long boot_heap_start)
{
int zimage_size;
unsigned long zimage_start, zimage_size;
/*
* We link ourself to an arbitrary low address. When we run, we
* relocate outself to that address. __image_beign points to
* the part of the image where the zImage is. -- Tom
*/
zimage_start = (char *)(unsigned long)(&__image_begin);
zimage_start = (unsigned long)(&__image_begin);
zimage_size = (unsigned long)(&__image_end) -
(unsigned long)(&__image_begin);
/*
* The zImage and initrd will be between start and _end, so they've
* already been moved once. We're good to go now. -- Tom
*/
puts("zimage at: ");
puthex((unsigned long)zimage_start);
puthex(zimage_start);
puts(" ");
puthex((unsigned long)(zimage_size + zimage_start));
puthex(zimage_size + zimage_start);
puts("\n");
/* this area are prepared for mallocing when decompressing */
/* This area are prepared for mallocing when decompressing */
free_mem_ptr = boot_heap_start;
free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE;
/* Display standard Linux/MIPS boot prompt for kernel args */
/* Display standard Linux/MIPS boot prompt */
puts("Uncompressing Linux at load address ");
puthex(VMLINUX_LOAD_ADDRESS_ULL);
puts("\n");
/* Decompress the kernel with according algorithm */
decompress(zimage_start, zimage_size, 0, 0,
decompress((char *)zimage_start, zimage_size, 0, 0,
(void *)VMLINUX_LOAD_ADDRESS_ULL, 0, error);
/* FIXME: is there a need to flush cache here? */
/* FIXME: should we flush cache here? */
puts("Now, booting the kernel...\n");
}