diff options
Diffstat (limited to 'arch/arm/include/asm')
| -rw-r--r-- | arch/arm/include/asm/arch-sunxi/dram.h | 22 |
1 files changed, 6 insertions, 16 deletions
diff --git a/arch/arm/include/asm/arch-sunxi/dram.h b/arch/arm/include/asm/arch-sunxi/dram.h index 8d78029a96..7ff43e6d3a 100644 --- a/arch/arm/include/asm/arch-sunxi/dram.h +++ b/arch/arm/include/asm/arch-sunxi/dram.h @@ -24,8 +24,6 @@ #include <asm/arch/dram_sun4i.h> #endif -#define MCTL_MEM_FILL_MATCH_COUNT 64 - unsigned long sunxi_dram_init(void); /* @@ -42,24 +40,16 @@ static inline void mctl_await_completion(u32 *reg, u32 mask, u32 val) } /* - * Fill beginning of DRAM with "random" data for mctl_mem_matches() - */ -static inline void mctl_mem_fill(void) -{ - int i; - - for (i = 0; i < MCTL_MEM_FILL_MATCH_COUNT; i++) - writel(0xaa55aa55 + i, CONFIG_SYS_SDRAM_BASE + i * 4); -} - -/* * Test if memory at offset offset matches memory at begin of DRAM */ static inline bool mctl_mem_matches(u32 offset) { - return memcmp((u32 *)CONFIG_SYS_SDRAM_BASE, - (u32 *)(CONFIG_SYS_SDRAM_BASE + offset), - MCTL_MEM_FILL_MATCH_COUNT * 4) == 0; + /* Try to write different values to RAM at two addresses */ + writel(0, CONFIG_SYS_SDRAM_BASE); + writel(0xaa55aa55, CONFIG_SYS_SDRAM_BASE + offset); + /* Check if the same value is actually observed when reading back */ + return readl(CONFIG_SYS_SDRAM_BASE) == + readl(CONFIG_SYS_SDRAM_BASE + offset); } #endif /* _SUNXI_DRAM_H */ |