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MIPS: BCM63xx: Fix SDRAM size computation for BCM6345 

Instead of hardcoding the amount of available RAM, read the number of
effective multiples of 8MB from SDRAM_MBASE_REG.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3008/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Florian Fainelli 2011-11-16 20:10:36 +01:00 committed by Ralf Baechle
parent 04712f3ff6
commit d61fcfe2bb
2 changed files with 6 additions and 2 deletions
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6
arch/mips/bcm63xx/cpu.c
View File

@ -170,8 +170,10 @@ static unsigned int detect_memory_size(void)
unsigned int cols = 0, rows = 0, is_32bits = 0, banks = 0;
u32 val;
if (BCMCPU_IS_6345())
return (8 * 1024 * 1024);
if (BCMCPU_IS_6345()) {
val = bcm_sdram_readl(SDRAM_MBASE_REG);
return (val * 8 * 1024 * 1024);
}
if (BCMCPU_IS_6338() || BCMCPU_IS_6348()) {
val = bcm_sdram_readl(SDRAM_CFG_REG);

2
arch/mips/include/asm/mach-bcm63xx/bcm63xx_regs.h
View File

@ -895,6 +895,8 @@
#define SDRAM_CFG_BANK_SHIFT 13
#define SDRAM_CFG_BANK_MASK (1 << SDRAM_CFG_BANK_SHIFT)
#define SDRAM_MBASE_REG 0xc
#define SDRAM_PRIO_REG 0x2C
#define SDRAM_PRIO_MIPS_SHIFT 29
#define SDRAM_PRIO_MIPS_MASK (1 << SDRAM_PRIO_MIPS_SHIFT)