diff options
Diffstat (limited to 'arch/arm/cpu/armv7/sunxi/board.c')
| -rw-r--r-- | arch/arm/cpu/armv7/sunxi/board.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/arch/arm/cpu/armv7/sunxi/board.c b/arch/arm/cpu/armv7/sunxi/board.c index eb5f4b686e..e80785ba56 100644 --- a/arch/arm/cpu/armv7/sunxi/board.c +++ b/arch/arm/cpu/armv7/sunxi/board.c @@ -113,11 +113,27 @@ int spl_board_load_image(void) void s_init(void) { -#if defined CONFIG_MACH_SUN6I || defined CONFIG_MACH_SUN8I_A23 - /* Magic (undocmented) value taken from boot0, without this DRAM - * access gets messed up (seems cache related) */ + /* + * Undocumented magic taken from boot0, without this DRAM + * access gets messed up (seems cache related). + * The boot0 sources describe this as: "config ema for cache sram" + */ +#if defined CONFIG_MACH_SUN6I setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0x1800); +#elif defined CONFIG_MACH_SUN8I_A23 + uint version; + + /* Unlock sram version info reg, read it, relock */ + setbits_le32(SUNXI_SRAMC_BASE + 0x24, (1 << 15)); + version = readl(SUNXI_SRAMC_BASE + 0x24); + clrbits_le32(SUNXI_SRAMC_BASE + 0x24, (1 << 15)); + + if ((version & 0xffff0000) == 0x16500000) + setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0x1800); + else /* 0x1661 ? */ + setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0xc0); #endif + #if defined CONFIG_MACH_SUN6I || \ defined CONFIG_MACH_SUN7I || \ defined CONFIG_MACH_SUN8I |