openwrt/target/linux/brcm63xx/image/lzma-loader/src/cache.c
Jonas Gorski 701e2a38fe brcm63xx: add working lzma-loader and use it for initramfs
Add a working lzma loader and use it for generating initramfs kernels
to allow easily netbooting elf kernels on devices with a 4 MiB CFE
size limit.

Based on ar71xx's lzma-loader.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 41940
2014-08-01 21:56:31 +00:00

47 lines
1.3 KiB
C

/*
* LZMA compressed kernel loader for Atheros AR7XXX/AR9XXX based boards
*
* Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
*
* The cache manipulation routine has been taken from the U-Boot project.
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
*/
#include "cache.h"
#include "cacheops.h"
#include "config.h"
#include "printf.h"
#define cache_op(op,addr) \
__asm__ __volatile__( \
" .set push \n" \
" .set noreorder \n" \
" .set mips3\n\t \n" \
" cache %0, %1 \n" \
" .set pop \n" \
: \
: "i" (op), "R" (*(unsigned char *)(addr)))
void flush_cache(unsigned long start_addr, unsigned long size)
{
unsigned long lsize = CONFIG_CACHELINE_SIZE;
unsigned long addr = start_addr & ~(lsize - 1);
unsigned long aend = (start_addr + size + (lsize - 1)) & ~(lsize - 1);
printf("blasting from 0x%08x to 0x%08x (0x%08x - 0x%08x)\n", start_addr, size, addr, aend);
while (1) {
cache_op(Hit_Writeback_Inv_D, addr);
cache_op(Hit_Invalidate_I, addr);
if (addr == aend)
break;
addr += lsize;
}
}