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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2009-06-01 18:35:26 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-06-01 18:35:26 +0100
commitc7f7ff179cb9f2f1e0244ef2c80afbb93c74ce2a (patch)
tree717656ebdba1fea6c763b2c57076c4c6996dfba3 /arch/arm/mach-realview
parenta22f277bba321474a01691ae66d5952926459f44 (diff)
parente03cdade0ca945a04e982525e50fef275190b77b (diff)
Merge branch 'smp' into devel
Diffstat (limited to 'arch/arm/mach-realview')
-rw-r--r--arch/arm/mach-realview/Makefile3
-rw-r--r--arch/arm/mach-realview/core.h3
-rw-r--r--arch/arm/mach-realview/include/mach/scu.h13
-rw-r--r--arch/arm/mach-realview/localtimer.c188
-rw-r--r--arch/arm/mach-realview/platsmp.c49
-rw-r--r--arch/arm/mach-realview/realview_eb.c1
-rw-r--r--arch/arm/mach-realview/realview_pb11mp.c1
7 files changed, 24 insertions, 234 deletions
diff --git a/arch/arm/mach-realview/Makefile b/arch/arm/mach-realview/Makefile
index 7bea8ffc4b5..e13d0947ad0 100644
--- a/arch/arm/mach-realview/Makefile
+++ b/arch/arm/mach-realview/Makefile
@@ -7,5 +7,6 @@ obj-$(CONFIG_MACH_REALVIEW_EB) += realview_eb.o
obj-$(CONFIG_MACH_REALVIEW_PB11MP) += realview_pb11mp.o
obj-$(CONFIG_MACH_REALVIEW_PB1176) += realview_pb1176.o
obj-$(CONFIG_MACH_REALVIEW_PBA8) += realview_pba8.o
-obj-$(CONFIG_SMP) += platsmp.o headsmp.o localtimer.o
+obj-$(CONFIG_SMP) += platsmp.o headsmp.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
+obj-$(CONFIG_LOCAL_TIMERS) += localtimer.o
diff --git a/arch/arm/mach-realview/core.h b/arch/arm/mach-realview/core.h
index 21c08637683..59a337ba4be 100644
--- a/arch/arm/mach-realview/core.h
+++ b/arch/arm/mach-realview/core.h
@@ -51,9 +51,6 @@ extern struct mmc_platform_data realview_mmc0_plat_data;
extern struct mmc_platform_data realview_mmc1_plat_data;
extern struct clcd_board clcd_plat_data;
extern void __iomem *gic_cpu_base_addr;
-#ifdef CONFIG_LOCAL_TIMERS
-extern void __iomem *twd_base;
-#endif
extern void __iomem *timer0_va_base;
extern void __iomem *timer1_va_base;
extern void __iomem *timer2_va_base;
diff --git a/arch/arm/mach-realview/include/mach/scu.h b/arch/arm/mach-realview/include/mach/scu.h
deleted file mode 100644
index d55802d645a..00000000000
--- a/arch/arm/mach-realview/include/mach/scu.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef __ASMARM_ARCH_SCU_H
-#define __ASMARM_ARCH_SCU_H
-
-/*
- * SCU registers
- */
-#define SCU_CTRL 0x00
-#define SCU_CONFIG 0x04
-#define SCU_CPU_STATUS 0x08
-#define SCU_INVALIDATE 0x0c
-#define SCU_FPGA_REVISION 0x10
-
-#endif
diff --git a/arch/arm/mach-realview/localtimer.c b/arch/arm/mach-realview/localtimer.c
index 1c01d13460f..60b4e111f45 100644
--- a/arch/arm/mach-realview/localtimer.c
+++ b/arch/arm/mach-realview/localtimer.c
@@ -9,196 +9,18 @@
* published by the Free Software Foundation.
*/
#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/device.h>
#include <linux/smp.h>
-#include <linux/jiffies.h>
-#include <linux/percpu.h>
#include <linux/clockchips.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <asm/hardware/arm_twd.h>
-#include <asm/hardware/gic.h>
-#include <mach/hardware.h>
#include <asm/irq.h>
-
-static DEFINE_PER_CPU(struct clock_event_device, local_clockevent);
-
-/*
- * Used on SMP for either the local timer or IPI_TIMER
- */
-void local_timer_interrupt(void)
-{
- struct clock_event_device *clk = &__get_cpu_var(local_clockevent);
-
- clk->event_handler(clk);
-}
-
-#ifdef CONFIG_LOCAL_TIMERS
-
-/* set up by the platform code */
-void __iomem *twd_base;
-
-static unsigned long mpcore_timer_rate;
-
-static void local_timer_set_mode(enum clock_event_mode mode,
- struct clock_event_device *clk)
-{
- unsigned long ctrl;
-
- switch(mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- /* timer load already set up */
- ctrl = TWD_TIMER_CONTROL_ENABLE | TWD_TIMER_CONTROL_IT_ENABLE
- | TWD_TIMER_CONTROL_PERIODIC;
- break;
- case CLOCK_EVT_MODE_ONESHOT:
- /* period set, and timer enabled in 'next_event' hook */
- ctrl = TWD_TIMER_CONTROL_IT_ENABLE | TWD_TIMER_CONTROL_ONESHOT;
- break;
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- default:
- ctrl = 0;
- }
-
- __raw_writel(ctrl, twd_base + TWD_TIMER_CONTROL);
-}
-
-static int local_timer_set_next_event(unsigned long evt,
- struct clock_event_device *unused)
-{
- unsigned long ctrl = __raw_readl(twd_base + TWD_TIMER_CONTROL);
-
- __raw_writel(evt, twd_base + TWD_TIMER_COUNTER);
- __raw_writel(ctrl | TWD_TIMER_CONTROL_ENABLE, twd_base + TWD_TIMER_CONTROL);
-
- return 0;
-}
-
-/*
- * local_timer_ack: checks for a local timer interrupt.
- *
- * If a local timer interrupt has occurred, acknowledge and return 1.
- * Otherwise, return 0.
- */
-int local_timer_ack(void)
-{
- if (__raw_readl(twd_base + TWD_TIMER_INTSTAT)) {
- __raw_writel(1, twd_base + TWD_TIMER_INTSTAT);
- return 1;
- }
-
- return 0;
-}
-
-static void __cpuinit twd_calibrate_rate(void)
-{
- unsigned long load, count;
- u64 waitjiffies;
-
- /*
- * If this is the first time round, we need to work out how fast
- * the timer ticks
- */
- if (mpcore_timer_rate == 0) {
- printk("Calibrating local timer... ");
-
- /* Wait for a tick to start */
- waitjiffies = get_jiffies_64() + 1;
-
- while (get_jiffies_64() < waitjiffies)
- udelay(10);
-
- /* OK, now the tick has started, let's get the timer going */
- waitjiffies += 5;
-
- /* enable, no interrupt or reload */
- __raw_writel(0x1, twd_base + TWD_TIMER_CONTROL);
-
- /* maximum value */
- __raw_writel(0xFFFFFFFFU, twd_base + TWD_TIMER_COUNTER);
-
- while (get_jiffies_64() < waitjiffies)
- udelay(10);
-
- count = __raw_readl(twd_base + TWD_TIMER_COUNTER);
-
- mpcore_timer_rate = (0xFFFFFFFFU - count) * (HZ / 5);
-
- printk("%lu.%02luMHz.\n", mpcore_timer_rate / 1000000,
- (mpcore_timer_rate / 100000) % 100);
- }
-
- load = mpcore_timer_rate / HZ;
-
- __raw_writel(load, twd_base + TWD_TIMER_LOAD);
-}
+#include <asm/smp_twd.h>
+#include <asm/localtimer.h>
/*
* Setup the local clock events for a CPU.
*/
-void __cpuinit local_timer_setup(void)
-{
- unsigned int cpu = smp_processor_id();
- struct clock_event_device *clk = &per_cpu(local_clockevent, cpu);
- unsigned long flags;
-
- twd_calibrate_rate();
-
- clk->name = "local_timer";
- clk->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
- clk->rating = 350;
- clk->set_mode = local_timer_set_mode;
- clk->set_next_event = local_timer_set_next_event;
- clk->irq = IRQ_LOCALTIMER;
- clk->cpumask = cpumask_of(cpu);
- clk->shift = 20;
- clk->mult = div_sc(mpcore_timer_rate, NSEC_PER_SEC, clk->shift);
- clk->max_delta_ns = clockevent_delta2ns(0xffffffff, clk);
- clk->min_delta_ns = clockevent_delta2ns(0xf, clk);
-
- /* Make sure our local interrupt controller has this enabled */
- local_irq_save(flags);
- get_irq_chip(IRQ_LOCALTIMER)->unmask(IRQ_LOCALTIMER);
- local_irq_restore(flags);
-
- clockevents_register_device(clk);
-}
-
-/*
- * take a local timer down
- */
-void __cpuexit local_timer_stop(void)
+void __cpuinit local_timer_setup(struct clock_event_device *evt)
{
- __raw_writel(0, twd_base + TWD_TIMER_CONTROL);
+ evt->irq = IRQ_LOCALTIMER;
+ twd_timer_setup(evt);
}
-
-#else /* CONFIG_LOCAL_TIMERS */
-
-static void dummy_timer_set_mode(enum clock_event_mode mode,
- struct clock_event_device *clk)
-{
-}
-
-void __cpuinit local_timer_setup(void)
-{
- unsigned int cpu = smp_processor_id();
- struct clock_event_device *clk = &per_cpu(local_clockevent, cpu);
-
- clk->name = "dummy_timer";
- clk->features = CLOCK_EVT_FEAT_ONESHOT |
- CLOCK_EVT_FEAT_PERIODIC |
- CLOCK_EVT_FEAT_DUMMY;
- clk->rating = 400;
- clk->mult = 1;
- clk->set_mode = dummy_timer_set_mode;
- clk->broadcast = smp_timer_broadcast;
- clk->cpumask = cpumask_of(cpu);
-
- clockevents_register_device(clk);
-}
-
-#endif /* !CONFIG_LOCAL_TIMERS */
diff --git a/arch/arm/mach-realview/platsmp.c b/arch/arm/mach-realview/platsmp.c
index 30a9c68591f..ca742172ea7 100644
--- a/arch/arm/mach-realview/platsmp.c
+++ b/arch/arm/mach-realview/platsmp.c
@@ -19,10 +19,11 @@
#include <asm/cacheflush.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
+#include <asm/localtimer.h>
#include <mach/board-eb.h>
#include <mach/board-pb11mp.h>
-#include <mach/scu.h>
+#include <asm/smp_scu.h>
#include "core.h"
@@ -44,31 +45,12 @@ static void __iomem *scu_base_addr(void)
return (void __iomem *)0;
}
-static unsigned int __init get_core_count(void)
+static inline unsigned int get_core_count(void)
{
- unsigned int ncores;
void __iomem *scu_base = scu_base_addr();
-
- if (scu_base) {
- ncores = __raw_readl(scu_base + SCU_CONFIG);
- ncores = (ncores & 0x03) + 1;
- } else
- ncores = 1;
-
- return ncores;
-}
-
-/*
- * Setup the SCU
- */
-static void scu_enable(void)
-{
- u32 scu_ctrl;
- void __iomem *scu_base = scu_base_addr();
-
- scu_ctrl = __raw_readl(scu_base + SCU_CTRL);
- scu_ctrl |= 1;
- __raw_writel(scu_ctrl, scu_base + SCU_CTRL);
+ if (scu_base)
+ return scu_get_core_count(scu_base);
+ return 1;
}
static DEFINE_SPINLOCK(boot_lock);
@@ -184,7 +166,7 @@ void __init smp_init_cpus(void)
unsigned int i, ncores = get_core_count();
for (i = 0; i < ncores; i++)
- cpu_set(i, cpu_possible_map);
+ set_cpu_possible(i, true);
}
void __init smp_prepare_cpus(unsigned int max_cpus)
@@ -217,19 +199,12 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
if (max_cpus > ncores)
max_cpus = ncores;
-#if defined(CONFIG_LOCAL_TIMERS) || defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST)
- /*
- * Enable the local timer or broadcast device for the boot CPU.
- */
- local_timer_setup();
-#endif
-
/*
* Initialise the present map, which describes the set of CPUs
* actually populated at the present time.
*/
for (i = 0; i < max_cpus; i++)
- cpu_set(i, cpu_present_map);
+ set_cpu_present(i, true);
/*
* Initialise the SCU if there are more than one CPU and let
@@ -239,7 +214,13 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
* WFI
*/
if (max_cpus > 1) {
- scu_enable();
+ /*
+ * Enable the local timer or broadcast device for the
+ * boot CPU, but only if we have more than one CPU.
+ */
+ percpu_timer_setup();
+
+ scu_enable(scu_base_addr());
poke_milo();
}
}
diff --git a/arch/arm/mach-realview/realview_eb.c b/arch/arm/mach-realview/realview_eb.c
index c20fbef122b..8dfa44e08a9 100644
--- a/arch/arm/mach-realview/realview_eb.c
+++ b/arch/arm/mach-realview/realview_eb.c
@@ -32,6 +32,7 @@
#include <asm/hardware/gic.h>
#include <asm/hardware/icst307.h>
#include <asm/hardware/cache-l2x0.h>
+#include <asm/localtimer.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
diff --git a/arch/arm/mach-realview/realview_pb11mp.c b/arch/arm/mach-realview/realview_pb11mp.c
index ea1e60eca35..dc4b1694390 100644
--- a/arch/arm/mach-realview/realview_pb11mp.c
+++ b/arch/arm/mach-realview/realview_pb11mp.c
@@ -32,6 +32,7 @@
#include <asm/hardware/gic.h>
#include <asm/hardware/icst307.h>
#include <asm/hardware/cache-l2x0.h>
+#include <asm/localtimer.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>