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authorChanghwan Youn <chaos.youn@samsung.com>2011-07-16 10:49:51 +0900
committerKukjin Kim <kgene.kim@samsung.com>2011-07-20 23:28:28 +0900
commitaab74d3e753649defa52ea43cbec1e91ebb4cc8e (patch)
tree452f0015f1a78897a8a22ee43ebdc7a8f576c55d /arch/arm/mach-exynos4
parente807acbc6fd1d5ff115f9a8eae0c1af6cf1c46c6 (diff)
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')
-rw-r--r--arch/arm/mach-exynos4/cpu.c10
-rw-r--r--arch/arm/mach-exynos4/include/mach/entry-macro.S5
-rw-r--r--arch/arm/mach-exynos4/include/mach/map.h1
-rw-r--r--arch/arm/mach-exynos4/platsmp.c27
4 files changed, 42 insertions, 1 deletions
diff --git a/arch/arm/mach-exynos4/cpu.c b/arch/arm/mach-exynos4/cpu.c
index 1aaad56ca7e..7dccf4ab11f 100644
--- a/arch/arm/mach-exynos4/cpu.c
+++ b/arch/arm/mach-exynos4/cpu.c
@@ -16,6 +16,7 @@
#include <asm/proc-fns.h>
#include <asm/hardware/cache-l2x0.h>
+#include <asm/hardware/gic.h>
#include <plat/cpu.h>
#include <plat/clock.h>
@@ -160,11 +161,20 @@ void __init exynos4_init_clocks(int xtal)
exynos4_setup_clocks();
}
+static void exynos4_gic_irq_eoi(struct irq_data *d)
+{
+ struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d);
+
+ gic_data->cpu_base = S5P_VA_GIC_CPU +
+ (EXYNOS4_GIC_BANK_OFFSET * smp_processor_id());
+}
+
void __init exynos4_init_irq(void)
{
int irq;
gic_init(0, IRQ_LOCALTIMER, S5P_VA_GIC_DIST, S5P_VA_GIC_CPU);
+ gic_arch_extn.irq_eoi = exynos4_gic_irq_eoi;
for (irq = 0; irq < MAX_COMBINER_NR; irq++) {
diff --git a/arch/arm/mach-exynos4/include/mach/entry-macro.S b/arch/arm/mach-exynos4/include/mach/entry-macro.S
index d8f38c2e565..4fad076baa4 100644
--- a/arch/arm/mach-exynos4/include/mach/entry-macro.S
+++ b/arch/arm/mach-exynos4/include/mach/entry-macro.S
@@ -10,6 +10,7 @@
*/
#include <mach/hardware.h>
+#include <mach/map.h>
#include <asm/hardware/gic.h>
.macro disable_fiq
@@ -18,6 +19,10 @@
.macro get_irqnr_preamble, base, tmp
ldr \base, =gic_cpu_base_addr
ldr \base, [\base]
+ mrc p15, 0, \tmp, c0, c0, 5
+ and \tmp, \tmp, #3
+ cmp \tmp, #1
+ addeq \base, \base, #EXYNOS4_GIC_BANK_OFFSET
.endm
.macro arch_ret_to_user, tmp1, tmp2
diff --git a/arch/arm/mach-exynos4/include/mach/map.h b/arch/arm/mach-exynos4/include/mach/map.h
index 0dbca26dfe6..36773561f54 100644
--- a/arch/arm/mach-exynos4/include/mach/map.h
+++ b/arch/arm/mach-exynos4/include/mach/map.h
@@ -61,6 +61,7 @@
#define EXYNOS4_PA_GIC_CPU 0x10480000
#define EXYNOS4_PA_GIC_DIST 0x10490000
+#define EXYNOS4_GIC_BANK_OFFSET 0x8000
#define EXYNOS4_PA_COREPERI 0x10500000
#define EXYNOS4_PA_TWD 0x10500600
diff --git a/arch/arm/mach-exynos4/platsmp.c b/arch/arm/mach-exynos4/platsmp.c
index c5e65a02be8..a79863cb7f7 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