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rk29: sram: clean up the code

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黄涛
2011-01-26 11:34:05 +08:00
parent 66dd1a16d1
commit e1e2b46fa2
1 changed files with 31 additions and 63 deletions
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94
arch/arm/mach-rk29/sram.c
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@@ -1,10 +1,5 @@
/*
* Copyright (C) 2008-2009 ST-Ericsson AB
* License terms: GNU General Public License (GPL) version 2
* TCM memory handling for ARM systems
*
* Author: Linus Walleij <linus.walleij@stericsson.com>
* Author: Rickard Andersson <rickard.andersson@stericsson.com>
*/
#include <linux/init.h>
#include <linux/kernel.h>
@@ -18,45 +13,31 @@
#include <asm/mach/map.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>
#include <mach/memory.h>
#include <mach/memory.h>
#include <mach/rk29_iomap.h>
/* SRAM section definitions from the linker */
extern char __sram_code_start, __ssram_code_text, __esram_code_text;
extern char __sram_data_start, __ssram_data, __esram_data;
static struct map_desc sram_code_iomap[] __initdata = {
/* SRAM section definitions from the linker */
extern char __sram_code_start, __ssram_code_text, __esram_code_text;
extern char __sram_data_start, __ssram_data, __esram_data;
static struct map_desc sram_code_iomap[] __initdata = {
{
.virtual = SRAM_CODE_OFFSET,
// .pfn = __phys_to_pfn(RK29_SRAM_PHYS),
.virtual = SRAM_CODE_OFFSET,
.pfn = __phys_to_pfn(0x0),
// .length = (SRAM_CODE_END - SRAM_CODE_OFFSET + 1),
.length = 1024*1024, // (SRAM_CODE_END - SRAM_CODE_OFFSET + 1),
.type = MT_MEMORY//MT_MEMORY //MT_HIGH_VECTORS//MT_MEMORY //MT_UNCACHED
.length = 1024*1024,
.type = MT_MEMORY
}
};
static struct map_desc sram_data_iomap[] __initdata = {
{
.virtual = SRAM_DATA_OFFSET,
// .pfn = __phys_to_pfn(RK29_SRAM_PHYS+0x2000),
.pfn = __phys_to_pfn(0x2000),
.length = (SRAM_DATA_END - SRAM_DATA_OFFSET + 1),
.type = MT_HIGH_VECTORS //MT_MEMORY //MT_UNCACHED
}
};
int __init rk29_sram_init(void)
{
char *start;
int __init rk29_sram_init(void)
{
char *start;
char *end;
char *ram;
char *ram;
iotable_init(sram_code_iomap, 1);
// iotable_init(sram_data_iomap, 1);
/*
* Normally devicemaps_init() would flush caches and tlb after
* mdesc->map_io(), but since we're called from map_io(), we
@@ -67,36 +48,23 @@ int __init rk29_sram_init(void)
memset((char *)SRAM_CODE_OFFSET,0x0,(SRAM_CODE_END - SRAM_CODE_OFFSET + 1));
memset((char *)SRAM_DATA_OFFSET,0x0,(SRAM_DATA_END - SRAM_DATA_OFFSET + 1));
/* Copy code from RAM to SRAM CODE */
start = &__ssram_code_text;
end = &__esram_code_text;
ram = &__sram_code_start;
memcpy(start, ram, (end-start));
/* Copy code from RAM to SRAM CODE */
start = &__ssram_code_text;
end = &__esram_code_text;
ram = &__sram_code_start;
memcpy(start, ram, (end-start));
flush_icache_range((unsigned long) start, (unsigned long) end);
printk("CPU SRAM: copied sram code from %p to %p - %p \n", ram, start, end);
printk("%08x %08x\n", *(u32 *)0xFF400628, *(u32 *)0xFF40062C);
// extern void DDR_EnterSelfRefresh();
// DDR_EnterSelfRefresh();
printk("CPU SRAM: start = [%x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x]\n",
start[0],start[1],start[2],start[3],start[4],start[5],start[6],start[7],start[8],start[9],start[10],start[11],start[12],start[13],start[14],start[15]);
start += 0x10;
printk("CPU SRAM: start = [%x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x]\n",
start[0],start[1],start[2],start[3],start[4],start[5],start[6],start[7],start[8],start[9],start[10],start[11],start[12],start[13],start[14],start[15]);
printk("CPU SRAM: copied sram code from %p to %p - %p\n", ram, start, end);
printk("CPU SRAM: ram = [%x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x]\n",
ram[0],ram[1],ram[2],ram[3],ram[4],ram[5],ram[6],ram[7],ram[8],ram[9],ram[10],ram[11],ram[12],ram[13],ram[14],ram[15]);
/* Copy data from RAM to SRAM DATA */
start = &__ssram_data;
end = &__esram_data;
ram = &__sram_data_start;
memcpy(start, ram, (end-start));
printk("CPU SRAM: copied sram data from %p to %p - %p\n", ram,start, end);
/* Copy data from RAM to SRAM DATA */
start = &__ssram_data;
end = &__esram_data;
ram = &__sram_data_start;
memcpy(start, ram, (end-start));
printk("CPU SRAM: copied sram data from %p to %p - %p\n", ram,start, end);
return 0;
}