From 1e1a77d6984a0010a2225de97009ae22f1ffa026 Mon Sep 17 00:00:00 2001 From: Wu Zhangjin Date: Wed, 16 Jun 2010 15:52:20 +0800 Subject: [PATCH] MIPS: Clean up arch/mips/boot/compressed/decompress.c - Remove several outdated comments - Clearify the definition of zimage_start and zimage_size and the their usage Signed-off-by: Wu Zhangjin Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1382/ Signed-off-by: Ralf Baechle --- arch/mips/boot/compressed/decompress.c | 38 +++++++++++++--------------------- 1 file changed, 14 insertions(+), 24 deletions(-) diff --git a/arch/mips/boot/compressed/decompress.c b/arch/mips/boot/compressed/decompress.c index 5db43c5..5cad0fa 100644 --- a/arch/mips/boot/compressed/decompress.c +++ b/arch/mips/boot/compressed/decompress.c @@ -1,9 +1,6 @@ /* - * Misc. bootloader code for many machines. - * * Copyright 2001 MontaVista Software Inc. - * Author: Matt Porter Derived from - * arch/ppc/boot/prep/misc.c + * Author: Matt Porter * * Copyright (C) 2009 Lemote, Inc. * Author: Wu Zhangjin @@ -19,12 +16,12 @@ #include -/* 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; - - /* - * 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); + unsigned long zimage_start, zimage_size; + + 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"); } -- 2.7.4