You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
158 lines
4.6 KiB
158 lines
4.6 KiB
From 85257b702e1d4c6dcc839c737833c42ca53bae93 Mon Sep 17 00:00:00 2001
|
|
From: Jonas Gorski <jogo@openwrt.org>
|
|
Date: Sun, 21 Apr 2013 15:38:56 +0200
|
|
Subject: [PATCH 35/53] 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>
|
|
@@ -20,6 +21,9 @@
|
|
#include <bcm63xx_irq.h>
|
|
|
|
|
|
+static DEFINE_SPINLOCK(ipic_lock);
|
|
+static DEFINE_SPINLOCK(epic_lock);
|
|
+
|
|
static u32 irq_stat_addr[2];
|
|
static u32 irq_mask_addr[2];
|
|
static void (*dispatch_internal)(int pin);
|
|
@@ -62,8 +66,10 @@ void __dispatch_internal_##width(int pin
|
|
bool irqs_pending = false; \
|
|
static int i[2]; \
|
|
int *next = &i[pin]; \
|
|
+ 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; \
|
|
\
|
|
@@ -74,6 +80,7 @@ void __dispatch_internal_##width(int pin
|
|
if (val) \
|
|
irqs_pending = true; \
|
|
} \
|
|
+ spin_unlock_irqrestore(&ipic_lock, flags); \
|
|
\
|
|
if (!irqs_pending) \
|
|
return; \
|
|
@@ -94,10 +101,13 @@ static void __internal_irq_mask_##width(
|
|
u32 val; \
|
|
unsigned reg = (irq / 32) ^ (width/32 - 1); \
|
|
unsigned bit = irq & 0x1f; \
|
|
+ unsigned long flags; \
|
|
\
|
|
+ spin_lock_irqsave(&ipic_lock, flags); \
|
|
val = bcm_readl(irq_mask_addr[0] + reg * sizeof(u32)); \
|
|
val &= ~(1 << bit); \
|
|
bcm_writel(val, irq_mask_addr[0] + reg * sizeof(u32)); \
|
|
+ spin_unlock_irqrestore(&ipic_lock, flags); \
|
|
} \
|
|
\
|
|
static void __internal_irq_unmask_##width(unsigned int irq) \
|
|
@@ -105,10 +115,13 @@ static void __internal_irq_unmask_##widt
|
|
u32 val; \
|
|
unsigned reg = (irq / 32) ^ (width/32 - 1); \
|
|
unsigned bit = irq & 0x1f; \
|
|
+ unsigned long flags; \
|
|
\
|
|
+ spin_lock_irqsave(&ipic_lock, flags); \
|
|
val = bcm_readl(irq_mask_addr[0] + reg * sizeof(u32)); \
|
|
val |= (1 << bit); \
|
|
bcm_writel(val, irq_mask_addr[0] + reg * sizeof(u32)); \
|
|
+ spin_unlock_irqrestore(&ipic_lock, flags); \
|
|
}
|
|
|
|
BUILD_IPIC_INTERNAL(32);
|
|
@@ -167,8 +180,10 @@ 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())
|
|
@@ -177,6 +192,8 @@ 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);
|
|
}
|
|
@@ -185,8 +202,10 @@ 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())
|
|
@@ -195,6 +214,7 @@ 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);
|
|
@@ -204,8 +224,10 @@ 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())
|
|
@@ -214,6 +236,7 @@ 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,
|
|
@@ -222,6 +245,7 @@ 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;
|
|
|
|
@@ -256,6 +280,7 @@ 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;
|
|
|
|
@@ -300,6 +325,7 @@ 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))
|
|
|