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kirkwood: implement kw_sdram_size_adjust

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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 <gerlando.falauto@keymile.com>
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
cc: Prafulla Wadaskar <prafulla@marvell.com>
cc: Valentin Longchamp <valentin.longchamp@keymile.com>
This commit is contained in:
Gerlando Falauto 2012-07-25 06:23:48 +00:00 committed by Prafulla Wadaskar
parent 4551516525
commit b3168f4be8
2 changed files with 12 additions and 0 deletions
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11
arch/arm/cpu/arm926ejs/kirkwood/dram.c
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@ -97,6 +97,17 @@ u32 kw_sdram_bs(enum memory_bank bank)
return result; 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 #ifndef CONFIG_SYS_BOARD_DRAM_INIT
int dram_init(void) int dram_init(void)
{ {

1
arch/arm/include/asm/arch-kirkwood/cpu.h
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@ -159,6 +159,7 @@ void reset_cpu(unsigned long ignored);
unsigned char get_random_hex(void); unsigned char get_random_hex(void);
unsigned int kw_sdram_bar(enum memory_bank bank); unsigned int kw_sdram_bar(enum memory_bank bank);
unsigned int kw_sdram_bs(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); int kw_config_adr_windows(void);
void kw_config_gpio(unsigned int gpp0_oe_val, unsigned int gpp1_oe_val, void kw_config_gpio(unsigned int gpp0_oe_val, unsigned int gpp1_oe_val,
unsigned int gpp0_oe, unsigned int gpp1_oe); unsigned int gpp0_oe, unsigned int gpp1_oe);