diff options
| -rw-r--r-- | arch/arm/mach-exynos/mcpm-exynos.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/mcpm-exynos.c b/arch/arm/mach-exynos/mcpm-exynos.c index ace0ed617476..0d95bc8e49d8 100644 --- a/arch/arm/mach-exynos/mcpm-exynos.c +++ b/arch/arm/mach-exynos/mcpm-exynos.c @@ -289,6 +289,19 @@ static void __naked exynos_pm_power_up_setup(unsigned int affinity_level) "b cci_enable_port_for_self"); } +static void __init exynos_cache_off(void) +{ + if (read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A15) { + /* disable L2 prefetching on the Cortex-A15 */ + asm volatile( + "mcr p15, 1, %0, c15, c0, 3\n\t" + "isb\n\t" + "dsb" + : : "r" (0x400)); + } + exynos_v7_exit_coherency_flush(all); +} + static const struct of_device_id exynos_dt_mcpm_match[] = { { .compatible = "samsung,exynos5420" }, { .compatible = "samsung,exynos5800" }, @@ -332,6 +345,8 @@ static int __init exynos_mcpm_init(void) ret = mcpm_platform_register(&exynos_power_ops); if (!ret) ret = mcpm_sync_init(exynos_pm_power_up_setup); + if (!ret) + ret = mcpm_loopback(exynos_cache_off); /* turn on the CCI */ if (ret) { iounmap(ns_sram_base_addr); return ret; |