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authorGraf Yang <graf.yang@analog.com>2009-05-15 11:01:59 +0000
committerMike Frysinger <vapier@gentoo.org>2009-06-12 06:11:37 -0400
commit1fa9be72b558c39459f98835eb86dbb4ef4da30b (patch)
treef0b71c7b7a3639285c64e3f3cbc449c3ff9eee3b /arch/blackfin/mach-common
parent555487bbb63f527e63fecbff48c86e2c07ce5024 (diff)
Blackfin: add support for gptimer0 as a tick source
For systems where the core cycles are not a usable tick source (like SMP or cycles gets updated), enable gptimer0 as an alternative. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/mach-common')
-rw-r--r--arch/blackfin/mach-common/ints-priority.c23
-rw-r--r--arch/blackfin/mach-common/smp.c5
2 files changed, 9 insertions, 19 deletions
diff --git a/arch/blackfin/mach-common/ints-priority.c b/arch/blackfin/mach-common/ints-priority.c
index 389c5e8aa45..6e808612d17 100644
--- a/arch/blackfin/mach-common/ints-priority.c
+++ b/arch/blackfin/mach-common/ints-priority.c
@@ -1052,7 +1052,7 @@ int __init init_arch_irq(void)
set_irq_chained_handler(irq, bfin_demux_error_irq);
break;
#endif
-#if defined(CONFIG_TICK_SOURCE_SYSTMR0) || defined(CONFIG_IPIPE)
+#if defined(CONFIG_TICKSOURCE_GPTMR0)
case IRQ_TIMER0:
set_irq_handler(irq, handle_percpu_irq);
break;
@@ -1232,13 +1232,9 @@ asmlinkage int __ipipe_grab_irq(int vec, struct pt_regs *regs)
if (likely(vec == EVT_IVTMR_P)) {
irq = IRQ_CORETMR;
- goto core_tick;
- }
-
- SSYNC();
+ } else {
#if defined(CONFIG_BF54x) || defined(CONFIG_BF52x) || defined(CONFIG_BF561)
- {
unsigned long sic_status[3];
sic_status[0] = bfin_read_SIC_ISR0() & bfin_read_SIC_IMASK0();
@@ -1254,9 +1250,7 @@ asmlinkage int __ipipe_grab_irq(int vec, struct pt_regs *regs)
if (sic_status[(ivg->irqno - IVG7) / 32] & ivg->isrflag)
break;
}
- }
#else
- {
unsigned long sic_status;
sic_status = bfin_read_SIC_IMASK() & bfin_read_SIC_ISR();
@@ -1268,15 +1262,13 @@ asmlinkage int __ipipe_grab_irq(int vec, struct pt_regs *regs)
} else if (sic_status & ivg->isrflag)
break;
}
- }
#endif
- irq = ivg->irqno;
+ irq = ivg->irqno;
+ }
if (irq == IRQ_SYSTMR) {
-#ifdef CONFIG_GENERIC_CLOCKEVENTS
-core_tick:
-#else
+#ifndef CONFIG_GENERIC_CLOCKEVENTS
bfin_write_TIMER_STATUS(1); /* Latch TIMIL0 */
#endif
/* This is basically what we need from the register frame. */
@@ -1288,9 +1280,6 @@ core_tick:
__raw_get_cpu_var(__ipipe_tick_regs).ipend |= 0x10;
}
-#ifndef CONFIG_GENERIC_CLOCKEVENTS
-core_tick:
-#endif
if (this_domain == ipipe_root_domain) {
s = __test_and_set_bit(IPIPE_SYNCDEFER_FLAG, &p->status);
barrier();
@@ -1308,7 +1297,7 @@ core_tick:
}
}
- return 0;
+ return 0;
}
#endif /* CONFIG_IPIPE */
diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c
index 187c79e585a..b6695957b06 100644
--- a/arch/blackfin/mach-common/smp.c
+++ b/arch/blackfin/mach-common/smp.c
@@ -43,6 +43,7 @@
#include <asm/processor.h>
#include <asm/ptrace.h>
#include <asm/cpu.h>
+#include <asm/time.h>
#include <linux/err.h>
/*
@@ -356,7 +357,7 @@ int __cpuinit __cpu_up(unsigned int cpu)
static void __cpuinit setup_secondary(unsigned int cpu)
{
-#if !(defined(CONFIG_TICK_SOURCE_SYSTMR0) || defined(CONFIG_IPIPE))
+#if !defined(CONFIG_TICKSOURCE_GPTMR0)
struct irq_desc *timer_desc;
#endif
unsigned long ilat;
@@ -377,7 +378,7 @@ static void __cpuinit setup_secondary(unsigned int cpu)
IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 |
IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW;
-#if defined(CONFIG_TICK_SOURCE_SYSTMR0) || defined(CONFIG_IPIPE)
+#if defined(CONFIG_TICKSOURCE_GPTMR0)
/* Power down the core timer, just to play safe. */
bfin_write_TCNTL(0);