From cdc7594e5c5f7509a86b205edeedc58d72dd3999 Mon Sep 17 00:00:00 2001 From: Bastian Hecht Date: Thu, 25 Oct 2012 12:58:22 +0200 Subject: [PATCH] ARM: shmobile: r8a7779: Replace modify_scu_cpu_psr with scu_power_mode We can remove the extra code of modify_scu_cpu_psr() and use the cleaner generic ARM helper scu_power_mode(). As every CPU only deals with its own power register and scu_power_mode() operates with 8-bit accesses, we save the locking overhead too. Signed-off-by: Bastian Hecht Signed-off-by: Simon Horman --- arch/arm/mach-shmobile/smp-r8a7779.c | 25 +++---------------------- 1 file changed, 3 insertions(+), 22 deletions(-) diff --git a/arch/arm/mach-shmobile/smp-r8a7779.c b/arch/arm/mach-shmobile/smp-r8a7779.c index 2ce6af9a6a37..9def0f22bf22 100644 --- a/arch/arm/mach-shmobile/smp-r8a7779.c +++ b/arch/arm/mach-shmobile/smp-r8a7779.c @@ -61,9 +61,6 @@ static void __iomem *scu_base_addr(void) return (void __iomem *)0xf0000000; } -static DEFINE_SPINLOCK(scu_lock); -static unsigned long tmp; - #ifdef CONFIG_HAVE_ARM_TWD static DEFINE_TWD_LOCAL_TIMER(twd_local_timer, 0xf0000600, 29); @@ -73,20 +70,6 @@ void __init r8a7779_register_twd(void) } #endif -static void modify_scu_cpu_psr(unsigned long set, unsigned long clr) -{ - void __iomem *scu_base = scu_base_addr(); - - spin_lock(&scu_lock); - tmp = __raw_readl(scu_base + 8); - tmp &= ~clr; - tmp |= set; - spin_unlock(&scu_lock); - - /* disable cache coherency after releasing the lock */ - __raw_writel(tmp, scu_base + 8); -} - static unsigned int __init r8a7779_get_core_count(void) { void __iomem *scu_base = scu_base_addr(); @@ -102,7 +85,7 @@ static int r8a7779_platform_cpu_kill(unsigned int cpu) cpu = cpu_logical_map(cpu); /* disable cache coherency */ - modify_scu_cpu_psr(3 << (cpu * 8), 0); + scu_power_mode(scu_base_addr(), 3); if (cpu < ARRAY_SIZE(r8a7779_ch_cpu)) ch = r8a7779_ch_cpu[cpu]; @@ -145,7 +128,7 @@ static int __cpuinit r8a7779_boot_secondary(unsigned int cpu, struct task_struct cpu = cpu_logical_map(cpu); /* enable cache coherency */ - modify_scu_cpu_psr(0, 3 << (cpu * 8)); + scu_power_mode(scu_base_addr(), 0); if (cpu < ARRAY_SIZE(r8a7779_ch_cpu)) ch = r8a7779_ch_cpu[cpu]; @@ -158,15 +141,13 @@ static int __cpuinit r8a7779_boot_secondary(unsigned int cpu, struct task_struct static void __init r8a7779_smp_prepare_cpus(unsigned int max_cpus) { - int cpu = cpu_logical_map(0); - scu_enable(scu_base_addr()); /* Map the reset vector (in headsmp.S) */ __raw_writel(__pa(shmobile_secondary_vector), AVECR); /* enable cache coherency on CPU0 */ - modify_scu_cpu_psr(0, 3 << (cpu * 8)); + scu_power_mode(scu_base_addr(), 0); r8a7779_pm_init(); -- 2.30.2