+++ /dev/null
-From 05e32e9dc84ee96728596c0b8b86de7eae8de229 Mon Sep 17 00:00:00 2001
-From: Jonas Gorski <jogo@openwrt.org>
-Date: Sun, 21 Apr 2013 15:38:56 +0200
-Subject: [PATCH 11/14] MIPS: BCM63XX: protect irq register accesses
-
----
- arch/mips/bcm63xx/irq.c | 26 ++++++++++++++++++++++++++
- 1 file changed, 26 insertions(+)
-
---- a/arch/mips/bcm63xx/irq.c
-+++ b/arch/mips/bcm63xx/irq.c
-@@ -12,6 +12,7 @@
- #include <linux/interrupt.h>
- #include <linux/module.h>
- #include <linux/irq.h>
-+#include <linux/spinlock.h>
- #include <asm/irq_cpu.h>
- #include <asm/mipsregs.h>
- #include <bcm63xx_cpu.h>
-@@ -26,6 +27,9 @@ static void __internal_irq_mask_64(unsig
- static void __internal_irq_unmask_32(unsigned int irq) __maybe_unused;
- static void __internal_irq_unmask_64(unsigned int irq) __maybe_unused;
-
-+static DEFINE_SPINLOCK(ipic_lock);
-+static DEFINE_SPINLOCK(epic_lock);
-+
- #ifndef BCMCPU_RUNTIME_DETECT
- #ifdef CONFIG_BCM63XX_CPU_3368
- #define irq_stat_reg0 PERF_IRQSTAT_3368_REG
-@@ -324,8 +328,10 @@ void __dispatch_internal_##width(int cpu
- u32 irq_stat_addr = get_irq_stat_addr(cpu); \
- u32 irq_mask_addr = get_irq_mask_addr(cpu); \
- int *next = &i[cpu]; \
-+ unsigned long flags; \
- \
- /* read registers in reverse order */ \
-+ spin_lock_irqsave(&ipic_lock, flags); \
- for (src = 0, tgt = (width / 32); src < (width / 32); src++) { \
- u32 val; \
- \
-@@ -336,6 +342,7 @@ void __dispatch_internal_##width(int cpu
- if (val) \
- irqs_pending = true; \
- } \
-+ spin_unlock_irqrestore(&ipic_lock, flags); \
- \
- if (!irqs_pending) \
- return; \
-@@ -357,10 +364,13 @@ static void __internal_irq_mask_##width(
- unsigned reg = (irq / 32) ^ (width/32 - 1); \
- unsigned bit = irq & 0x1f; \
- u32 irq_mask_addr = get_irq_mask_addr(0); \
-+ unsigned long flags; \
- \
-+ spin_lock_irqsave(&ipic_lock, flags); \
- val = bcm_readl(irq_mask_addr + reg * sizeof(u32)); \
- val &= ~(1 << bit); \
- bcm_writel(val, irq_mask_addr + reg * sizeof(u32)); \
-+ spin_unlock_irqrestore(&ipic_lock, flags); \
- } \
- \
- static void __internal_irq_unmask_##width(unsigned int irq) \
-@@ -369,10 +379,13 @@ static void __internal_irq_unmask_##widt
- unsigned reg = (irq / 32) ^ (width/32 - 1); \
- unsigned bit = irq & 0x1f; \
- u32 irq_mask_addr = get_irq_mask_addr(0); \
-+ unsigned long flags; \
- \
-+ spin_lock_irqsave(&ipic_lock, flags); \
- val = bcm_readl(irq_mask_addr + reg * sizeof(u32)); \
- val |= (1 << bit); \
- bcm_writel(val, irq_mask_addr + reg * sizeof(u32)); \
-+ spin_unlock_irqrestore(&ipic_lock, flags); \
- }
-
- BUILD_IPIC_INTERNAL(32);
-@@ -431,8 +444,10 @@ static void bcm63xx_external_irq_mask(st
- {
- unsigned int irq = d->irq - IRQ_EXTERNAL_BASE;
- u32 reg, regaddr;
-+ unsigned long flags;
-
- regaddr = get_ext_irq_perf_reg(irq);
-+ spin_lock_irqsave(&epic_lock, flags);
- reg = bcm_perf_readl(regaddr);
-
- if (BCMCPU_IS_6348())
-@@ -441,6 +456,8 @@ static void bcm63xx_external_irq_mask(st
- reg &= ~EXTIRQ_CFG_MASK(irq % 4);
-
- bcm_perf_writel(reg, regaddr);
-+ spin_unlock_irqrestore(&epic_lock, flags);
-+
- if (is_ext_irq_cascaded)
- internal_irq_mask(irq + ext_irq_start);
- }
-@@ -449,8 +466,10 @@ static void bcm63xx_external_irq_unmask(
- {
- unsigned int irq = d->irq - IRQ_EXTERNAL_BASE;
- u32 reg, regaddr;
-+ unsigned long flags;
-
- regaddr = get_ext_irq_perf_reg(irq);
-+ spin_lock_irqsave(&epic_lock, flags);
- reg = bcm_perf_readl(regaddr);
-
- if (BCMCPU_IS_6348())
-@@ -459,6 +478,7 @@ static void bcm63xx_external_irq_unmask(
- reg |= EXTIRQ_CFG_MASK(irq % 4);
-
- bcm_perf_writel(reg, regaddr);
-+ spin_unlock_irqrestore(&epic_lock, flags);
-
- if (is_ext_irq_cascaded)
- internal_irq_unmask(irq + ext_irq_start);
-@@ -468,8 +488,10 @@ static void bcm63xx_external_irq_clear(s
- {
- unsigned int irq = d->irq - IRQ_EXTERNAL_BASE;
- u32 reg, regaddr;
-+ unsigned long flags;
-
- regaddr = get_ext_irq_perf_reg(irq);
-+ spin_lock_irqsave(&epic_lock, flags);
- reg = bcm_perf_readl(regaddr);
-
- if (BCMCPU_IS_6348())
-@@ -478,6 +500,7 @@ static void bcm63xx_external_irq_clear(s
- reg |= EXTIRQ_CFG_CLEAR(irq % 4);
-
- bcm_perf_writel(reg, regaddr);
-+ spin_unlock_irqrestore(&epic_lock, flags);
- }
-
- static int bcm63xx_external_irq_set_type(struct irq_data *d,
-@@ -486,6 +509,7 @@ static int bcm63xx_external_irq_set_type
- unsigned int irq = d->irq - IRQ_EXTERNAL_BASE;
- u32 reg, regaddr;
- int levelsense, sense, bothedge;
-+ unsigned long flags;
-
- flow_type &= IRQ_TYPE_SENSE_MASK;
-
-@@ -520,6 +544,7 @@ static int bcm63xx_external_irq_set_type
- }
-
- regaddr = get_ext_irq_perf_reg(irq);
-+ spin_lock_irqsave(&epic_lock, flags);
- reg = bcm_perf_readl(regaddr);
- irq %= 4;
-
-@@ -564,6 +589,7 @@ static int bcm63xx_external_irq_set_type
- }
-
- bcm_perf_writel(reg, regaddr);
-+ spin_unlock_irqrestore(&epic_lock, flags);
-
- irqd_set_trigger_type(d, flow_type);
- if (flow_type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
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