From b3168f4be86ef02905281ff7531960112e10cc7e Mon Sep 17 00:00:00 2001 From: Gerlando Falauto Date: Wed, 25 Jul 2012 06:23:48 +0000 Subject: [PATCH] kirkwood: implement kw_sdram_size_adjust Size of the SDRAM chips might differ between any two (otherwise identical) instances of the same board. So add a function kw_sdram_size_adjust() which reads out the current ram size for a given bank, and adjusts the Kirkwood's SDRAM window size register accordingly. Signed-off-by: Gerlando Falauto Signed-off-by: Holger Brunck cc: Prafulla Wadaskar cc: Valentin Longchamp --- arch/arm/cpu/arm926ejs/kirkwood/dram.c | 11 +++++++++++ arch/arm/include/asm/arch-kirkwood/cpu.h | 1 + 2 files changed, 12 insertions(+) diff --git a/arch/arm/cpu/arm926ejs/kirkwood/dram.c b/arch/arm/cpu/arm926ejs/kirkwood/dram.c index 5e2f9d8..807894f 100644 --- a/arch/arm/cpu/arm926ejs/kirkwood/dram.c +++ b/arch/arm/cpu/arm926ejs/kirkwood/dram.c @@ -97,6 +97,17 @@ u32 kw_sdram_bs(enum memory_bank bank) return result; } +void kw_sdram_size_adjust(enum memory_bank bank) +{ + u32 size; + + /* probe currently equipped RAM size */ + size = get_ram_size((void *)kw_sdram_bar(bank), kw_sdram_bs(bank)); + + /* adjust SDRAM window size accordingly */ + kw_sdram_bs_set(bank, size); +} + #ifndef CONFIG_SYS_BOARD_DRAM_INIT int dram_init(void) { diff --git a/arch/arm/include/asm/arch-kirkwood/cpu.h b/arch/arm/include/asm/arch-kirkwood/cpu.h index d28c51a..23783d5 100644 --- a/arch/arm/include/asm/arch-kirkwood/cpu.h +++ b/arch/arm/include/asm/arch-kirkwood/cpu.h @@ -159,6 +159,7 @@ void reset_cpu(unsigned long ignored); unsigned char get_random_hex(void); unsigned int kw_sdram_bar(enum memory_bank bank); unsigned int kw_sdram_bs(enum memory_bank bank); +void kw_sdram_size_adjust(enum memory_bank bank); int kw_config_adr_windows(void); void kw_config_gpio(unsigned int gpp0_oe_val, unsigned int gpp1_oe_val, unsigned int gpp0_oe, unsigned int gpp1_oe); -- 2.7.4