diff options
Diffstat (limited to 'arch/arm/mach-mvebu/cpu.c')
| -rw-r--r-- | arch/arm/mach-mvebu/cpu.c | 36 |
1 files changed, 22 insertions, 14 deletions
diff --git a/arch/arm/mach-mvebu/cpu.c b/arch/arm/mach-mvebu/cpu.c index ea83e21..efd4d04 100644 --- a/arch/arm/mach-mvebu/cpu.c +++ b/arch/arm/mach-mvebu/cpu.c @@ -214,32 +214,40 @@ static void setup_usb_phys(void) int arch_cpu_init(void) { -#ifndef CONFIG_SPL_BUILD +#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_ARMADA_38X) + /* + * Only with disabled MMU its possible to switch the base + * register address on Armada 38x. Without this the SDRAM + * located at >= 0x4000.0000 is also not accessible, as its + * still locked to cache. + */ + mmu_disable(); +#endif + + /* Linux expects the internal registers to be at 0xf1000000 */ + writel(SOC_REGS_PHY_BASE, INTREG_BASE_ADDR_REG); + set_cbar(SOC_REGS_PHY_BASE + 0xC000); + +#if !defined(CONFIG_SPL_BUILD) + /* + * From this stage on, the SoC detection is working. As we have + * configured the internal register base to the value used + * in the macros / defines in the U-Boot header (soc.h). + */ if (mvebu_soc_family() == MVEBU_SOC_A38X) { struct pl310_regs *const pl310 = (struct pl310_regs *)CONFIG_SYS_PL310_BASE; /* - * Only with disabled MMU its possible to switch the base - * register address on Armada 38x. Without this the SDRAM - * located at >= 0x4000.0000 is also not accessible, as its - * still locked to cache. - * - * So to fully release / unlock this area from cache, we need - * to first flush all caches, then disable the MMU and - * disable the L2 cache. + * To fully release / unlock this area from cache, we need + * to flush all caches and disable the L2 cache. */ icache_disable(); dcache_disable(); - mmu_disable(); clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); } #endif - /* Linux expects the internal registers to be at 0xf1000000 */ - writel(SOC_REGS_PHY_BASE, INTREG_BASE_ADDR_REG); - set_cbar(SOC_REGS_PHY_BASE + 0xC000); - /* * We need to call mvebu_mbus_probe() before calling * update_sdram_window_sizes() as it disables all previously |