diff options
Diffstat (limited to 'arch/arm/include/asm/arch-sunxi/dram.h')
| -rw-r--r-- | arch/arm/include/asm/arch-sunxi/dram.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-sunxi/dram.h b/arch/arm/include/asm/arch-sunxi/dram.h index 9072e68229..7ff43e6d3a 100644 --- a/arch/arm/include/asm/arch-sunxi/dram.h +++ b/arch/arm/include/asm/arch-sunxi/dram.h @@ -12,15 +12,44 @@ #ifndef _SUNXI_DRAM_H #define _SUNXI_DRAM_H +#include <asm/io.h> #include <linux/types.h> /* dram regs definition */ #if defined(CONFIG_MACH_SUN6I) #include <asm/arch/dram_sun6i.h> +#elif defined(CONFIG_MACH_SUN8I) +#include <asm/arch/dram_sun8i.h> #else #include <asm/arch/dram_sun4i.h> #endif unsigned long sunxi_dram_init(void); +/* + * Wait up to 1s for value to be set in given part of reg. + */ +static inline void mctl_await_completion(u32 *reg, u32 mask, u32 val) +{ + unsigned long tmo = timer_get_us() + 1000000; + + while ((readl(reg) & mask) != val) { + if (timer_get_us() > tmo) + panic("Timeout initialising DRAM\n"); + } +} + +/* + * Test if memory at offset offset matches memory at begin of DRAM + */ +static inline bool mctl_mem_matches(u32 offset) +{ + /* 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 */ |