diff options
Diffstat (limited to 'arch/arm/mach-exynos')
| -rw-r--r-- | arch/arm/mach-exynos/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/mach-exynos/mcpm-exynos.c | 17 | ||||
| -rw-r--r-- | arch/arm/mach-exynos/platsmp.c | 4 | ||||
| -rw-r--r-- | arch/arm/mach-exynos/pm.c | 11 |
4 files changed, 24 insertions, 9 deletions
diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig index 8f9b66c4ac78..5d4ff6571dcd 100644 --- a/arch/arm/mach-exynos/Kconfig +++ b/arch/arm/mach-exynos/Kconfig @@ -119,6 +119,7 @@ config EXYNOS5420_MCPM bool "Exynos5420 Multi-Cluster PM support" depends on MCPM && SOC_EXYNOS5420 select ARM_CCI + select ARM_CPU_SUSPEND help This is needed to provide CPU and cluster power management on Exynos5420 implementing big.LITTLE. diff --git a/arch/arm/mach-exynos/mcpm-exynos.c b/arch/arm/mach-exynos/mcpm-exynos.c index ace0ed617476..a96b78f93f2b 100644 --- a/arch/arm/mach-exynos/mcpm-exynos.c +++ b/arch/arm/mach-exynos/mcpm-exynos.c @@ -196,7 +196,7 @@ static void exynos_power_down(void) if (last_man && __mcpm_outbound_enter_critical(cpu, cluster)) { arch_spin_unlock(&exynos_mcpm_lock); - if (read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A15) { + if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A15) { /* * On the Cortex-A15 we need to disable * L2 prefetching before flushing the cache. @@ -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() == 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; diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c index 50b9aad5e27b..70d1e65a51d8 100644 --- a/arch/arm/mach-exynos/platsmp.c +++ b/arch/arm/mach-exynos/platsmp.c @@ -190,7 +190,7 @@ static void __init exynos_smp_init_cpus(void) void __iomem *scu_base = scu_base_addr(); unsigned int i, ncores; - if (read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A9) + if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) ncores = scu_base ? scu_get_core_count(scu_base) : 1; else /* @@ -216,7 +216,7 @@ static void __init exynos_smp_prepare_cpus(unsigned int max_cpus) exynos_sysram_init(); - if (read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A9) + if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) scu_enable(scu_base_addr()); /* diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c index 202ca73e49c4..67d383de614f 100644 --- a/arch/arm/mach-exynos/pm.c +++ b/arch/arm/mach-exynos/pm.c @@ -300,7 +300,7 @@ static int exynos_pm_suspend(void) tmp = (S5P_USE_STANDBY_WFI0 | S5P_USE_STANDBY_WFE0); __raw_writel(tmp, S5P_CENTRAL_SEQ_OPTION); - if (read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A9) + if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) exynos_cpu_save_register(); return 0; @@ -334,7 +334,7 @@ static void exynos_pm_resume(void) if (exynos_pm_central_resume()) goto early_wakeup; - if (read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A9) + if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) exynos_cpu_restore_register(); /* For release retention */ @@ -353,7 +353,7 @@ static void exynos_pm_resume(void) s3c_pm_do_restore_core(exynos_core_save, ARRAY_SIZE(exynos_core_save)); - if (read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A9) + if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) scu_enable(S5P_VA_SCU); early_wakeup: @@ -440,15 +440,14 @@ static int exynos_cpu_pm_notifier(struct notifier_block *self, case CPU_PM_ENTER: if (cpu == 0) { exynos_pm_central_suspend(); - if (read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A9) + if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) exynos_cpu_save_register(); } break; case CPU_PM_EXIT: if (cpu == 0) { - if (read_cpuid_part_number() == - ARM_CPU_PART_CORTEX_A9) { + if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) { scu_enable(S5P_VA_SCU); exynos_cpu_restore_register(); } |