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| author | Changhwan Youn <chaos.youn@samsung.com> | 2011-07-16 01:49:51 (GMT) |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-07-20 14:28:28 (GMT) |
| commit | aab74d3e753649defa52ea43cbec1e91ebb4cc8e (patch) | |
| tree | 452f0015f1a78897a8a22ee43ebdc7a8f576c55d /arch/arm/mach-exynos4/platsmp.c | |
| parent | e807acbc6fd1d5ff115f9a8eae0c1af6cf1c46c6 (diff) | |
| download | linux-aab74d3e753649defa52ea43cbec1e91ebb4cc8e.tar.xz | |
ARM: EXYNOS4: Add support external GIC
For full support of power modes, this patch adds implementation
external GIC on EXYNOS4.
External GIC of Exynos4 cannot support register banking so
several interrupt related code for CPU1 should be different
from that of CPU0.
Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/mach-exynos4/platsmp.c')
| -rw-r--r-- | arch/arm/mach-exynos4/platsmp.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/arch/arm/mach-exynos4/platsmp.c b/arch/arm/mach-exynos4/platsmp.c index c5e65a0..a79863c 100644 --- a/arch/arm/mach-exynos4/platsmp.c +++ b/arch/arm/mach-exynos4/platsmp.c @@ -58,6 +58,31 @@ static void __iomem *scu_base_addr(void) static DEFINE_SPINLOCK(boot_lock); +static void __cpuinit exynos4_gic_secondary_init(void) +{ + void __iomem *dist_base = S5P_VA_GIC_DIST + + (EXYNOS4_GIC_BANK_OFFSET * smp_processor_id()); + void __iomem *cpu_base = S5P_VA_GIC_CPU + + (EXYNOS4_GIC_BANK_OFFSET * smp_processor_id()); + int i; + + /* + * Deal with the banked PPI and SGI interrupts - disable all + * PPI interrupts, ensure all SGI interrupts are enabled. + */ + __raw_writel(0xffff0000, dist_base + GIC_DIST_ENABLE_CLEAR); + __raw_writel(0x0000ffff, dist_base + GIC_DIST_ENABLE_SET); + + /* + * Set priority on PPI and SGI interrupts + */ + for (i = 0; i < 32; i += 4) + __raw_writel(0xa0a0a0a0, dist_base + GIC_DIST_PRI + i * 4 / 4); + + __raw_writel(0xf0, cpu_base + GIC_CPU_PRIMASK); + __raw_writel(1, cpu_base + GIC_CPU_CTRL); +} + void __cpuinit platform_secondary_init(unsigned int cpu) { /* @@ -65,7 +90,7 @@ void __cpuinit platform_secondary_init(unsigned int cpu) * core (e.g. timer irq), then they will not have been enabled * for us: do so */ - gic_secondary_init(0); + exynos4_gic_secondary_init(); /* * let the primary processor know we're out of the |