diff options
Diffstat (limited to 'arch/arm/cpu/armv7/omap4/board.c')
| -rw-r--r-- | arch/arm/cpu/armv7/omap4/board.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/arch/arm/cpu/armv7/omap4/board.c b/arch/arm/cpu/armv7/omap4/board.c index 195be6eea..8c1f3953e 100644 --- a/arch/arm/cpu/armv7/omap4/board.c +++ b/arch/arm/cpu/armv7/omap4/board.c @@ -30,6 +30,7 @@ #include <common.h> #include <asm/arch/cpu.h> #include <asm/arch/sys_proto.h> +#include <asm/sizes.h> /* * Routine: s_init @@ -66,6 +67,33 @@ void watchdog_init(void) writel(WD_UNLOCK2, &wd2_base->wspr); } + +/* + * This function finds the SDRAM size available in the system + * based on DMM section configurations + * This is needed because the size of memory installed may be + * different on different versions of the board + */ +u32 sdram_size(void) +{ + u32 section, i, total_size = 0, size, addr; + for (i = 0; i < 4; i++) { + section = __raw_readl(DMM_LISA_MAP_BASE + i*4); + addr = section & DMM_LISA_MAP_SYS_ADDR_MASK; + /* See if the address is valid */ + if ((addr >= OMAP44XX_DRAM_ADDR_SPACE_START) && + (addr < OMAP44XX_DRAM_ADDR_SPACE_END)) { + size = ((section & DMM_LISA_MAP_SYS_SIZE_MASK) >> + DMM_LISA_MAP_SYS_SIZE_SHIFT); + size = 1 << size; + size *= SZ_16M; + total_size += size; + } + } + return total_size; +} + + /* * Routine: dram_init * Description: sets uboots idea of sdram size @@ -75,7 +103,7 @@ int dram_init(void) DECLARE_GLOBAL_DATA_PTR; gd->bd->bi_dram[0].start = 0x80000000; - gd->bd->bi_dram[0].size = 512 << 20; + gd->bd->bi_dram[0].size = sdram_size(); return 0; } |