diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/include/asm/pl310.h | 9 | ||||
| -rw-r--r-- | arch/arm/mach-mvebu/cpu.c | 13 | ||||
| -rw-r--r-- | arch/arm/mach-mvebu/lowlevel.S | 27 |
3 files changed, 34 insertions, 15 deletions
diff --git a/arch/arm/include/asm/pl310.h b/arch/arm/include/asm/pl310.h index f69e9e45f86..9d4cd68ee42 100644 --- a/arch/arm/include/asm/pl310.h +++ b/arch/arm/include/asm/pl310.h @@ -7,13 +7,12 @@ #ifndef _PL310_H_ #define _PL310_H_ -#include <linux/types.h> - /* Register bit fields */ #define PL310_AUX_CTRL_ASSOCIATIVITY_MASK (1 << 16) #define L2X0_DYNAMIC_CLK_GATING_EN (1 << 1) #define L2X0_STNDBY_MODE_EN (1 << 0) #define L2X0_CTRL_EN 1 +#define L2X0_CTRL_OFF 0x100 #define L310_SHARED_ATT_OVERRIDE_ENABLE (1 << 22) #define L310_AUX_CTRL_DATA_PREFETCH_MASK (1 << 28) @@ -27,6 +26,10 @@ #define L2X0_CACHE_ID_RTL_MASK 0x3f #define L2X0_CACHE_ID_RTL_R3P2 0x8 +#ifndef __ASSEMBLY__ + +#include <linux/types.h> + struct pl310_regs { u32 pl310_cache_id; u32 pl310_cache_type; @@ -87,3 +90,5 @@ void pl310_inval_range(u32 start, u32 end); void pl310_clean_inval_range(u32 start, u32 end); #endif + +#endif diff --git a/arch/arm/mach-mvebu/cpu.c b/arch/arm/mach-mvebu/cpu.c index 77e403ba73a..1f8cdf8744e 100644 --- a/arch/arm/mach-mvebu/cpu.c +++ b/arch/arm/mach-mvebu/cpu.c @@ -445,19 +445,6 @@ static void setup_usb_phys(void) */ int arch_cpu_init(void) { - struct pl310_regs *const pl310 = - (struct pl310_regs *)CONFIG_SYS_PL310_BASE; - - if (!IS_ENABLED(CONFIG_ARMADA_XP)) { - /* - * To fully release / unlock this area from cache, we need - * to flush all caches and disable the L2 cache. - */ - icache_disable(); - dcache_disable(); - clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN); - } - /* * We need to call mvebu_mbus_probe() before calling * update_sdram_window_sizes() as it disables all previously diff --git a/arch/arm/mach-mvebu/lowlevel.S b/arch/arm/mach-mvebu/lowlevel.S index b460382c6ba..60c2072c354 100644 --- a/arch/arm/mach-mvebu/lowlevel.S +++ b/arch/arm/mach-mvebu/lowlevel.S @@ -3,6 +3,7 @@ #include <config.h> #include <linux/linkage.h> #include <asm/system.h> +#include <asm/pl310.h> ENTRY(arch_very_early_init) #ifdef CONFIG_ARMADA_38X @@ -11,10 +12,36 @@ ENTRY(arch_very_early_init) * 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. */ + + /* Invalidate L1 I/D */ + mov r0, #0 @ set up for MCR + mcr p15, 0, r0, c8, c7, 0 @ invalidate TLBs + mcr p15, 0, r0, c7, c5, 0 @ invalidate icache + mcr p15, 0, r0, c7, c5, 6 @ invalidate BP array + mcr p15, 0, r0, c7, c10, 4 @ DSB + mcr p15, 0, r0, c7, c5, 4 @ ISB + + /* Disable MMU */ mrc p15, 0, r0, c1, c0, 0 bic r0, #CR_M mcr p15, 0, r0, c1, c0, 0 + + /* + * Disable L2 cache + * + * NOTE: Internal registers are still at address INTREG_BASE_ADDR_REG + * but CONFIG_SYS_PL310_BASE is already calculated from base + * address SOC_REGS_PHY_BASE. + */ + ldr r1, =(CONFIG_SYS_PL310_BASE - SOC_REGS_PHY_BASE + INTREG_BASE_ADDR_REG) + ldr r0, [r1, #L2X0_CTRL_OFF] + bic r0, #L2X0_CTRL_EN + str r0, [r1, #L2X0_CTRL_OFF] #endif /* Move internal registers from INTREG_BASE_ADDR_REG to SOC_REGS_PHY_BASE */ |