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authorSonic Zhang <sonic.zhang@analog.com>2013-12-04 15:27:47 +0800
committerSteven Miao <realmz6@gmail.com>2014-01-29 15:12:20 +0800
commit1b6012394bec5dc653d495245c5495db08f817f6 (patch)
tree88c290099d8155fd3c4c5828843c29837c815e05 /arch
parentcccdfcf728e2f322e8986a39bc02bf5aaa8fe8a7 (diff)
downloadlinux-1b6012394bec5dc653d495245c5495db08f817f6.tar.bz2
blackfin: Support L1 SRAM parity checking feature on bf60x
Move code for the SEC faults from the IRQ hanlders into IRQ actions. refine bfin fault routine handle Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Steven Miao <realmz6@gmail.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/blackfin/include/asm/def_LPBlackfin.h1
-rw-r--r--arch/blackfin/mach-bf609/Kconfig6
-rw-r--r--arch/blackfin/mach-common/cache-c.c10
-rw-r--r--arch/blackfin/mach-common/ints-priority.c41
4 files changed, 37 insertions, 21 deletions
diff --git a/arch/blackfin/include/asm/def_LPBlackfin.h b/arch/blackfin/include/asm/def_LPBlackfin.h
index ca67145c6a45..c5c8d8a3a5fa 100644
--- a/arch/blackfin/include/asm/def_LPBlackfin.h
+++ b/arch/blackfin/include/asm/def_LPBlackfin.h
@@ -544,6 +544,7 @@ do { \
#define DCBS_P 0x04 /* L1 Data Cache Bank Select */
#define PORT_PREF0_P 0x12 /* DAG0 Port Preference */
#define PORT_PREF1_P 0x13 /* DAG1 Port Preference */
+#define RDCHK 0x9 /* Enable L1 Parity Check */
/* Masks */
#define ENDM 0x00000001 /* (doesn't really exist) Enable
diff --git a/arch/blackfin/mach-bf609/Kconfig b/arch/blackfin/mach-bf609/Kconfig
index b0fca44110b0..6584190faeb8 100644
--- a/arch/blackfin/mach-bf609/Kconfig
+++ b/arch/blackfin/mach-bf609/Kconfig
@@ -17,6 +17,12 @@ config SEC_IRQ_PRIORITY_LEVELS
Divide the total number of interrupt priority levels into sub-levels.
There is 2 ^ (SEC_IRQ_PRIORITY_LEVELS + 1) different levels.
+config L1_PARITY_CHECK
+ bool "Enable L1 parity check"
+ default n
+ help
+ Enable the L1 parity check in L1 sram. A fault event is raised
+ when L1 parity error is found.
comment "System Cross Bar Priority Assignment"
diff --git a/arch/blackfin/mach-common/cache-c.c b/arch/blackfin/mach-common/cache-c.c
index 1a5a28829c6b..f4adedc92895 100644
--- a/arch/blackfin/mach-common/cache-c.c
+++ b/arch/blackfin/mach-common/cache-c.c
@@ -41,6 +41,16 @@ bfin_cache_init(struct cplb_entry *cplb_tbl, unsigned long cplb_addr,
unsigned long mem_mask)
{
int i;
+#ifdef CONFIG_L1_PARITY_CHECK
+ u32 ctrl;
+
+ if (cplb_addr == DCPLB_ADDR0) {
+ ctrl = bfin_read32(mem_control) | (1 << RDCHK);
+ CSYNC();
+ bfin_write32(mem_control, ctrl);
+ SSYNC();
+ }
+#endif
for (i = 0; i < MAX_CPLBS; i++) {
bfin_write32(cplb_addr + i * 4, cplb_tbl[i].addr);
diff --git a/arch/blackfin/mach-common/ints-priority.c b/arch/blackfin/mach-common/ints-priority.c
index ca75613231c8..867b7cef204c 100644
--- a/arch/blackfin/mach-common/ints-priority.c
+++ b/arch/blackfin/mach-common/ints-priority.c
@@ -471,13 +471,8 @@ void handle_sec_ssi_fault(uint32_t gstat)
}
-void handle_sec_fault(unsigned int irq, struct irq_desc *desc)
+void handle_sec_fault(uint32_t sec_gstat)
{
- uint32_t sec_gstat;
-
- raw_spin_lock(&desc->lock);
-
- sec_gstat = bfin_read32(SEC_GSTAT);
if (sec_gstat & SEC_GSTAT_ERR) {
switch (sec_gstat & SEC_GSTAT_ERRC) {
@@ -494,18 +489,16 @@ void handle_sec_fault(unsigned int irq, struct irq_desc *desc)
}
-
- raw_spin_unlock(&desc->lock);
-
- handle_fasteoi_irq(irq, desc);
}
-void handle_core_fault(unsigned int irq, struct irq_desc *desc)
+static struct irqaction bfin_fault_irq = {
+ .name = "Blackfin fault",
+};
+
+static irqreturn_t bfin_fault_routine(int irq, void *data)
{
struct pt_regs *fp = get_irq_regs();
- raw_spin_lock(&desc->lock);
-
switch (irq) {
case IRQ_C0_DBL_FAULT:
double_fault_c(fp);
@@ -522,11 +515,15 @@ void handle_core_fault(unsigned int irq, struct irq_desc *desc)
case IRQ_C0_NMI_L1_PARITY_ERR:
panic("Core 0 NMI L1 parity error");
break;
+ case IRQ_SEC_ERR:
+ pr_err("SEC error\n");
+ handle_sec_fault(bfin_read32(SEC_GSTAT));
+ break;
default:
- panic("Core 1 fault %d occurs unexpectedly", irq);
+ panic("Unknown fault %d", irq);
}
- raw_spin_unlock(&desc->lock);
+ return IRQ_HANDLED;
}
#endif /* SEC_GCTL */
@@ -1195,12 +1192,7 @@ int __init init_arch_irq(void)
handle_percpu_irq);
} else {
irq_set_chip(irq, &bfin_sec_irqchip);
- if (irq == IRQ_SEC_ERR)
- irq_set_handler(irq, handle_sec_fault);
- else if (irq >= IRQ_C0_DBL_FAULT && irq < CORE_IRQS)
- irq_set_handler(irq, handle_core_fault);
- else
- irq_set_handler(irq, handle_fasteoi_irq);
+ irq_set_handler(irq, handle_fasteoi_irq);
__irq_set_preflow_handler(irq, bfin_sec_preflow_handler);
}
}
@@ -1239,6 +1231,13 @@ int __init init_arch_irq(void)
register_syscore_ops(&sec_pm_syscore_ops);
#endif
+ bfin_fault_irq.handler = bfin_fault_routine;
+#ifdef CONFIG_L1_PARITY_CHECK
+ setup_irq(IRQ_C0_NMI_L1_PARITY_ERR, &bfin_fault_irq);
+#endif
+ setup_irq(IRQ_C0_DBL_FAULT, &bfin_fault_irq);
+ setup_irq(IRQ_SEC_ERR, &bfin_fault_irq);
+
return 0;
}