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authorLinus Torvalds <torvalds@linux-foundation.org>2013-09-10 01:33:57 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-10 01:33:57 +0200
commitfa91515cbf2375a64c8bd0a033a05b0859dff591 (patch)
tree78d426e740152fa7abd6500b19ca0218190a2729 /arch/arm/mach-shmobile/smp-sh73a0.c
parentMerge tag 'drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff)
parentMerge tag 'renesas-smp-for-v3.12' of git://git.kernel.org/pub/scm/linux/kerne... (diff)
downloadlinux-fa91515cbf2375a64c8bd0a033a05b0859dff591.tar.xz
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Merge tag 'renesas-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM Renesas SoC cleanup, refactoring and more SMP support from Kevin Hilman: "Lots of cleanup and refactoring and some SMP additions for Renesas platforms. Due to some inter-dependencies with other arm-soc branches, this Renesas stuff was separated out for sending after the other branches were merged. Highlights: - remove unused board support and cleanup of unused headers - refactoring of init and device registration - simplify IRQ initialization" * tag 'renesas-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (68 commits) ARM: shmobile: Per-CPU SMP boot / sleep code for SCU SoCs ARM: shmobile: Introduce per-CPU SMP boot / sleep code ARM: shmobile: Use shared SCU CPU Hotplug code on r8a7779 ARM: shmobile: Use shared SCU CPU Hotplug code on sh73a0 ARM: shmobile: Add shared SCU CPU Hotplug code ARM: shmobile: Use shared SCU SMP boot code on emev2 ARM: shmobile: Use shared SCU SMP boot code on r8a7779 ARM: shmobile: Use shared SCU SMP boot code on sh73a0 ARM: shmobile: Introduce shared SCU SMP boot code ARM: shmobile: sh73a0: Remove global GPIO_NR definition ARM: shmobile: kzm9d: remove nfsroot settings from bootargs ARM: shmobile: armadillo800eva: remove nfsroot settings from bootargs ARM: shmobile: r8a7779: move r8a7779_init_irq_xxx() to setup ARM: shmobile: r8a7740: move r8a7740_init_irq_of() to setup ARM: shmobile: bockw: add missing __initdata ARM: shmobile: r8a7790: add missing __initdata ARM: shmobile: r8a7779: add missing __initdata ARM: shmobile: Remove unused shmobile_init_time() ARM: shmobile: Use clocksource_of_init() on r8a7790 ARM: shmobile: Use default ->init_time() on KZM9G DT ref ...
Diffstat (limited to 'arch/arm/mach-shmobile/smp-sh73a0.c')
-rw-r--r--arch/arm/mach-shmobile/smp-sh73a0.c72
1 files changed, 15 insertions, 57 deletions
diff --git a/arch/arm/mach-shmobile/smp-sh73a0.c b/arch/arm/mach-shmobile/smp-sh73a0.c
index d5fc3ed4e315..0baa24443793 100644
--- a/arch/arm/mach-shmobile/smp-sh73a0.c
+++ b/arch/arm/mach-shmobile/smp-sh73a0.c
@@ -20,14 +20,11 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/smp.h>
-#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <mach/common.h>
-#include <asm/cacheflush.h>
-#include <asm/smp_plat.h>
#include <mach/sh73a0.h>
-#include <asm/smp_scu.h>
+#include <asm/smp_plat.h>
#include <asm/smp_twd.h>
#define WUPCR IOMEM(0xe6151010)
@@ -36,8 +33,6 @@
#define SBAR IOMEM(0xe6180020)
#define APARMBAREA IOMEM(0xe6f10020)
-#define PSTR_SHUTDOWN_MODE 3
-
#define SH73A0_SCU_BASE 0xf0000000
#ifdef CONFIG_HAVE_ARM_TWD
@@ -50,69 +45,33 @@ void __init sh73a0_register_twd(void)
static int sh73a0_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
- cpu = cpu_logical_map(cpu);
+ unsigned int lcpu = cpu_logical_map(cpu);
+ int ret;
- if (((__raw_readl(PSTR) >> (4 * cpu)) & 3) == 3)
- __raw_writel(1 << cpu, WUPCR); /* wake up */
+ ret = shmobile_smp_scu_boot_secondary(cpu, idle);
+ if (ret)
+ return ret;
+
+ if (((__raw_readl(PSTR) >> (4 * lcpu)) & 3) == 3)
+ __raw_writel(1 << lcpu, WUPCR); /* wake up */
else
- __raw_writel(1 << cpu, SRESCR); /* reset */
+ __raw_writel(1 << lcpu, SRESCR); /* reset */
return 0;
}
static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
{
- scu_enable(shmobile_scu_base);
-
- /* Map the reset vector (in headsmp-scu.S, headsmp.S) */
+ /* Map the reset vector (in headsmp.S) */
__raw_writel(0, APARMBAREA); /* 4k */
__raw_writel(__pa(shmobile_boot_vector), SBAR);
- shmobile_boot_fn = virt_to_phys(shmobile_boot_scu);
- shmobile_boot_arg = (unsigned long)shmobile_scu_base;
- /* enable cache coherency on booting CPU */
- scu_power_mode(shmobile_scu_base, SCU_PM_NORMAL);
-}
-
-static void __init sh73a0_smp_init_cpus(void)
-{
- /* setup sh73a0 specific SCU base */
+ /* setup sh73a0 specific SCU bits */
shmobile_scu_base = IOMEM(SH73A0_SCU_BASE);
-
- shmobile_smp_init_cpus(scu_get_core_count(shmobile_scu_base));
+ shmobile_smp_scu_prepare_cpus(max_cpus);
}
#ifdef CONFIG_HOTPLUG_CPU
-static int sh73a0_cpu_kill(unsigned int cpu)
-{
-
- int k;
- u32 pstr;
-
- /*
- * wait until the power status register confirms the shutdown of the
- * offline target
- */
- for (k = 0; k < 1000; k++) {
- pstr = (__raw_readl(PSTR) >> (4 * cpu)) & 3;
- if (pstr == PSTR_SHUTDOWN_MODE)
- return 1;
-
- mdelay(1);
- }
-
- return 0;
-}
-
-static void sh73a0_cpu_die(unsigned int cpu)
-{
- /* Set power off mode. This takes the CPU out of the MP cluster */
- scu_power_mode(shmobile_scu_base, SCU_PM_POWEROFF);
-
- /* Enter shutdown mode */
- cpu_do_idle();
-}
-
static int sh73a0_cpu_disable(unsigned int cpu)
{
return 0; /* CPU0 and CPU1 supported */
@@ -120,12 +79,11 @@ static int sh73a0_cpu_disable(unsigned int cpu)
#endif /* CONFIG_HOTPLUG_CPU */
struct smp_operations sh73a0_smp_ops __initdata = {
- .smp_init_cpus = sh73a0_smp_init_cpus,
.smp_prepare_cpus = sh73a0_smp_prepare_cpus,
.smp_boot_secondary = sh73a0_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
- .cpu_kill = sh73a0_cpu_kill,
- .cpu_die = sh73a0_cpu_die,
.cpu_disable = sh73a0_cpu_disable,
+ .cpu_die = shmobile_smp_scu_cpu_die,
+ .cpu_kill = shmobile_smp_scu_cpu_kill,
#endif
};