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ARM: SoC: convert shmobile SMP to SMP operations

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Convert shmobile SMP platforms to use struct smp_operations to provide
their SMP and CPU hotplug operations.

Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Marc Zyngier 2011-09-08 13:15:22 +01:00 committed by Arnd Bergmann
parent 5ac21a943e
commit a62580e580
15 changed files with 165 additions and 146 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/mach-shmobile/board-ag5evm.c
View File

@ -650,6 +650,7 @@ static void __init ag5evm_init(void)
}
MACHINE_START(AG5EVM, "ag5evm")
.smp = smp_ops(sh73a0_smp_ops),
.map_io = sh73a0_map_io,
.init_early = sh73a0_add_early_devices,
.nr_irqs = NR_IRQS_LEGACY,

1
arch/arm/mach-shmobile/board-kota2.c
View File

@ -545,6 +545,7 @@ static void __init kota2_init(void)
}
MACHINE_START(KOTA2, "kota2")
.smp = smp_ops(sh73a0_smp_ops),
.map_io = sh73a0_map_io,
.init_early = sh73a0_add_early_devices,
.nr_irqs = NR_IRQS_LEGACY,

1
arch/arm/mach-shmobile/board-kzm9d.c
View File

@ -84,6 +84,7 @@ static const char *kzm9d_boards_compat_dt[] __initdata = {
};
DT_MACHINE_START(KZM9D_DT, "kzm9d")
.smp = smp_ops(emev2_smp_ops),
.map_io = emev2_map_io,
.init_early = emev2_add_early_devices,
.nr_irqs = NR_IRQS_LEGACY,

1
arch/arm/mach-shmobile/board-kzm9g.c
View File

@ -769,6 +769,7 @@ static const char *kzm9g_boards_compat_dt[] __initdata = {
};
DT_MACHINE_START(KZM9G_DT, "kzm9g")
.smp = smp_ops(sh73a0_smp_ops),
.map_io = sh73a0_map_io,
.init_early = sh73a0_add_early_devices,
.nr_irqs = NR_IRQS_LEGACY,

1
arch/arm/mach-shmobile/board-marzen.c
View File

@ -102,6 +102,7 @@ static void __init marzen_init(void)
}
MACHINE_START(MARZEN, "marzen")
.smp = smp_ops(r8a7779_smp_ops),
.map_io = r8a7779_map_io,
.init_early = r8a7779_add_early_devices,
.nr_irqs = NR_IRQS_LEGACY,

31
arch/arm/mach-shmobile/hotplug.c
View File

@ -14,30 +14,16 @@
#include <linux/smp.h>
#include <linux/cpumask.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <mach/common.h>
#include <mach/r8a7779.h>
#include <mach/emev2.h>
#include <asm/cacheflush.h>
#include <asm/mach-types.h>
static cpumask_t dead_cpus;
int platform_cpu_kill(unsigned int cpu)
{
int k;
/* this function is running on another CPU than the offline target,
* here we need wait for shutdown code in platform_cpu_die() to
* finish before asking SoC-specific code to power off the CPU core.
*/
for (k = 0; k < 1000; k++) {
if (cpumask_test_cpu(cpu, &dead_cpus))
return shmobile_platform_cpu_kill(cpu);
mdelay(1);
}
return 0;
}
void platform_cpu_die(unsigned int cpu)
void shmobile_cpu_die(unsigned int cpu)
{
/* hardware shutdown code running on the CPU that is being offlined */
flush_cache_all();
@ -60,7 +46,7 @@ void platform_cpu_die(unsigned int cpu)
}
}
int platform_cpu_disable(unsigned int cpu)
int shmobile_cpu_disable(unsigned int cpu)
{
cpumask_clear_cpu(cpu, &dead_cpus);
/*
@ -69,3 +55,8 @@ int platform_cpu_disable(unsigned int cpu)
*/
return cpu == 0 ? -EPERM : 0;
}
int shmobile_cpu_is_dead(unsigned int cpu)
{
return cpumask_test_cpu(cpu, &dead_cpus);
}

24
arch/arm/mach-shmobile/include/mach/common.h
View File

@ -4,11 +4,10 @@
extern void shmobile_earlytimer_init(void);
extern struct sys_timer shmobile_timer;
extern void shmobile_setup_delay(unsigned int max_cpu_core_mhz,
unsigned int mult, unsigned int div);
unsigned int mult, unsigned int div);
struct twd_local_timer;
extern void shmobile_setup_console(void);
extern void shmobile_secondary_vector(void);
extern int shmobile_platform_cpu_kill(unsigned int cpu);
struct clk;
extern int shmobile_clk_init(void);
extern void shmobile_handle_irq_intc(struct pt_regs *);
@ -58,11 +57,6 @@ extern struct clk sh73a0_extal2_clk;
extern struct clk sh73a0_extcki_clk;
extern struct clk sh73a0_extalr_clk;
extern unsigned int sh73a0_get_core_count(void);
extern void sh73a0_secondary_init(unsigned int cpu);
extern int sh73a0_boot_secondary(unsigned int cpu);
extern void sh73a0_smp_prepare_cpus(void);
extern void r8a7740_init_irq(void);
extern void r8a7740_map_io(void);
extern void r8a7740_add_early_devices(void);
@ -79,11 +73,6 @@ extern void r8a7779_pinmux_init(void);
extern void r8a7779_pm_init(void);
extern void r8a7740_meram_workaround(void);
extern unsigned int r8a7779_get_core_count(void);
extern int r8a7779_platform_cpu_kill(unsigned int cpu);
extern void r8a7779_secondary_init(unsigned int cpu);
extern int r8a7779_boot_secondary(unsigned int cpu);
extern void r8a7779_smp_prepare_cpus(void);
extern void r8a7779_register_twd(void);
extern void shmobile_init_late(void);
@ -100,4 +89,15 @@ int shmobile_cpuidle_init(void);
static inline int shmobile_cpuidle_init(void) { return 0; }
#endif
extern void shmobile_cpu_die(unsigned int cpu);
extern int shmobile_cpu_disable(unsigned int cpu);
#ifdef CONFIG_HOTPLUG_CPU
extern int shmobile_cpu_is_dead(unsigned int cpu);
#else
static inline int shmobile_cpu_is_dead(unsigned int cpu) { return 1; }
#endif
extern void shmobile_smp_init_cpus(unsigned int ncores);
#endif /* __ARCH_MACH_COMMON_H */

7
arch/arm/mach-shmobile/include/mach/emev2.h
View File

@ -7,13 +7,10 @@ extern void emev2_add_early_devices(void);
extern void emev2_add_standard_devices(void);
extern void emev2_clock_init(void);
extern void emev2_set_boot_vector(unsigned long value);
extern unsigned int emev2_get_core_count(void);
extern int emev2_platform_cpu_kill(unsigned int cpu);
extern void emev2_secondary_init(unsigned int cpu);
extern int emev2_boot_secondary(unsigned int cpu);
extern void emev2_smp_prepare_cpus(void);
#define EMEV2_GPIO_BASE 200
#define EMEV2_GPIO_IRQ(n) (EMEV2_GPIO_BASE + (n))
extern struct smp_operations emev2_smp_ops;
#endif /* __ASM_EMEV2_H__ */

2
arch/arm/mach-shmobile/include/mach/r8a7779.h
View File

@ -360,4 +360,6 @@ extern void r8a7779_add_device_to_domain(struct r8a7779_pm_domain *r8a7779_pd,
#define r8a7779_add_device_to_domain(pd, pdev) do { } while (0)
#endif /* CONFIG_PM */
extern struct smp_operations r8a7779_smp_ops;
#endif /* __ASM_R8A7779_H__ */

2
arch/arm/mach-shmobile/include/mach/sh73a0.h
View File

@ -557,4 +557,6 @@ enum {
#define SH73A0_PINT0_IRQ(irq) ((irq) + 700)
#define SH73A0_PINT1_IRQ(irq) ((irq) + 732)
extern struct smp_operations sh73a0_smp_ops;
#endif /* __ASM_SH73A0_H__ */

96
arch/arm/mach-shmobile/platsmp.c
View File

@ -11,100 +11,11 @@
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/smp.h>
#include <linux/io.h>
#include <linux/of.h>
#include <asm/hardware/gic.h>
#include <asm/mach-types.h>
#include <mach/common.h>
#include <mach/emev2.h>
#ifdef CONFIG_ARCH_SH73A0
#define is_sh73a0() (machine_is_ag5evm() || machine_is_kota2() || \
of_machine_is_compatible("renesas,sh73a0"))
#else
#define is_sh73a0() (0)
#endif
#define is_r8a7779() machine_is_marzen()
#ifdef CONFIG_ARCH_EMEV2
#define is_emev2() of_machine_is_compatible("renesas,emev2")
#else
#define is_emev2() (0)
#endif
static unsigned int __init shmobile_smp_get_core_count(void)
void __init shmobile_smp_init_cpus(unsigned int ncores)
{
if (is_sh73a0())
return sh73a0_get_core_count();
if (is_r8a7779())
return r8a7779_get_core_count();
if (is_emev2())
return emev2_get_core_count();
return 1;
}
static void __init shmobile_smp_prepare_cpus(void)
{
if (is_sh73a0())
sh73a0_smp_prepare_cpus();
if (is_r8a7779())
r8a7779_smp_prepare_cpus();
if (is_emev2())
emev2_smp_prepare_cpus();
}
int shmobile_platform_cpu_kill(unsigned int cpu)
{
if (is_r8a7779())
return r8a7779_platform_cpu_kill(cpu);
if (is_emev2())
return emev2_platform_cpu_kill(cpu);
return 1;
}
void __cpuinit platform_secondary_init(unsigned int cpu)
{
trace_hardirqs_off();
if (is_sh73a0())
sh73a0_secondary_init(cpu);
if (is_r8a7779())
r8a7779_secondary_init(cpu);
if (is_emev2())
emev2_secondary_init(cpu);
}
int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
{
if (is_sh73a0())
return sh73a0_boot_secondary(cpu);
if (is_r8a7779())
return r8a7779_boot_secondary(cpu);
if (is_emev2())
return emev2_boot_secondary(cpu);
return -ENOSYS;
}
void __init smp_init_cpus(void)
{
unsigned int ncores = shmobile_smp_get_core_count();
unsigned int i;
if (ncores > nr_cpu_ids) {
@ -118,8 +29,3 @@ void __init smp_init_cpus(void)
set_smp_cross_call(gic_raise_softirq);
}
void __init platform_smp_prepare_cpus(unsigned int max_cpus)
{
shmobile_smp_prepare_cpus();
}

1
arch/arm/mach-shmobile/setup-emev2.c
View File

@ -440,6 +440,7 @@ void __init emev2_init_irq_dt(void)
}
DT_MACHINE_START(EMEV2_DT, "Generic Emma Mobile EV2 (Flattened Device Tree)")
.smp = smp_ops(emev2_smp_ops),
.init_early = emev2_init_delay,
.nr_irqs = NR_IRQS_LEGACY,
.init_irq = emev2_init_irq_dt,

47
arch/arm/mach-shmobile/smp-emev2.c
View File

@ -50,7 +50,7 @@ static void modify_scu_cpu_psr(unsigned long set, unsigned long clr)
}
unsigned int __init emev2_get_core_count(void)
static unsigned int __init emev2_get_core_count(void)
{
if (!scu_base) {
scu_base = ioremap(EMEV2_SCU_BASE, PAGE_SIZE);
@ -62,17 +62,35 @@ unsigned int __init emev2_get_core_count(void)
return scu_base ? scu_get_core_count(scu_base) : 1;
}
int emev2_platform_cpu_kill(unsigned int cpu)
static int emev2_platform_cpu_kill(unsigned int cpu)
{
return 0; /* not supported yet */
}
void __cpuinit emev2_secondary_init(unsigned int cpu)
static int __maybe_unused emev2_cpu_kill(unsigned int cpu)
{
int k;
/* this function is running on another CPU than the offline target,
* here we need wait for shutdown code in platform_cpu_die() to
* finish before asking SoC-specific code to power off the CPU core.
*/
for (k = 0; k < 1000; k++) {
if (shmobile_cpu_is_dead(cpu))
return emev2_platform_cpu_kill(cpu);
mdelay(1);
}
return 0;
}
static void __cpuinit emev2_secondary_init(unsigned int cpu)
{
gic_secondary_init(0);
}
int __cpuinit emev2_boot_secondary(unsigned int cpu)
static int __cpuinit emev2_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
cpu = cpu_logical_map(cpu);
@ -86,7 +104,7 @@ int __cpuinit emev2_boot_secondary(unsigned int cpu)
return 0;
}
void __init emev2_smp_prepare_cpus(void)
static void __init emev2_smp_prepare_cpus(unsigned int max_cpus)
{
int cpu = cpu_logical_map(0);
@ -95,3 +113,22 @@ void __init emev2_smp_prepare_cpus(void)
/* enable cache coherency on CPU0 */
modify_scu_cpu_psr(0, 3 << (cpu * 8));
}
static void __init emev2_smp_init_cpus(void)
{
unsigned int ncores = emev2_get_core_count();
shmobile_smp_init_cpus(ncores);
}
struct smp_operations emev2_smp_ops __initdata = {
.smp_init_cpus = emev2_smp_init_cpus,
.smp_prepare_cpus = emev2_smp_prepare_cpus,
.smp_secondary_init = emev2_secondary_init,
.smp_boot_secondary = emev2_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_kill = emev2_cpu_kill,
.cpu_die = shmobile_cpu_die,
.cpu_disable = shmobile_cpu_disable,
#endif
};

48
arch/arm/mach-shmobile/smp-r8a7779.c
View File

@ -87,14 +87,14 @@ static void modify_scu_cpu_psr(unsigned long set, unsigned long clr)
__raw_writel(tmp, scu_base + 8);
}
unsigned int __init r8a7779_get_core_count(void)
static unsigned int __init r8a7779_get_core_count(void)
{
void __iomem *scu_base = scu_base_addr();
return scu_get_core_count(scu_base);
}
int r8a7779_platform_cpu_kill(unsigned int cpu)
static int r8a7779_platform_cpu_kill(unsigned int cpu)
{
struct r8a7779_pm_ch *ch = NULL;
int ret = -EIO;
@ -113,12 +113,31 @@ int r8a7779_platform_cpu_kill(unsigned int cpu)
return ret ? ret : 1;
}
void __cpuinit r8a7779_secondary_init(unsigned int cpu)
static int __maybe_unused r8a7779_cpu_kill(unsigned int cpu)
{
int k;
/* this function is running on another CPU than the offline target,
* here we need wait for shutdown code in platform_cpu_die() to
* finish before asking SoC-specific code to power off the CPU core.
*/
for (k = 0; k < 1000; k++) {
if (shmobile_cpu_is_dead(cpu))
return r8a7779_platform_cpu_kill(cpu);
mdelay(1);
}
return 0;
}
static void __cpuinit r8a7779_secondary_init(unsigned int cpu)
{
gic_secondary_init(0);
}
int __cpuinit r8a7779_boot_secondary(unsigned int cpu)
static int __cpuinit r8a7779_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
struct r8a7779_pm_ch *ch = NULL;
int ret = -EIO;
@ -137,7 +156,7 @@ int __cpuinit r8a7779_boot_secondary(unsigned int cpu)
return ret;
}
void __init r8a7779_smp_prepare_cpus(void)
static void __init r8a7779_smp_prepare_cpus(unsigned int max_cpus)
{
int cpu = cpu_logical_map(0);
@ -156,3 +175,22 @@ void __init r8a7779_smp_prepare_cpus(void)
r8a7779_platform_cpu_kill(2);
r8a7779_platform_cpu_kill(3);
}
static void __init r8a7779_smp_init_cpus(void)
{
unsigned int ncores = r8a7779_get_core_count();
shmobile_smp_init_cpus(ncores);
}
struct smp_operations r8a7779_smp_ops __initdata = {
.smp_init_cpus = r8a7779_smp_init_cpus,
.smp_prepare_cpus = r8a7779_smp_prepare_cpus,
.smp_secondary_init = r8a7779_secondary_init,
.smp_boot_secondary = r8a7779_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_kill = r8a7779_cpu_kill,
.cpu_die = shmobile_cpu_die,
.cpu_disable = shmobile_cpu_disable,
#endif
};

48
arch/arm/mach-shmobile/smp-sh73a0.c
View File

@ -22,8 +22,10 @@
#include <linux/smp.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <mach/common.h>
#include <asm/smp_plat.h>
#include <mach/sh73a0.h>
#include <asm/smp_scu.h>
#include <asm/smp_twd.h>
#include <asm/hardware/gic.h>
@ -64,19 +66,19 @@ static void modify_scu_cpu_psr(unsigned long set, unsigned long clr)
__raw_writel(tmp, scu_base + 8);
}
unsigned int __init sh73a0_get_core_count(void)
static unsigned int __init sh73a0_get_core_count(void)
{
void __iomem *scu_base = scu_base_addr();
return scu_get_core_count(scu_base);
}
void __cpuinit sh73a0_secondary_init(unsigned int cpu)
static void __cpuinit sh73a0_secondary_init(unsigned int cpu)
{
gic_secondary_init(0);
}
int __cpuinit sh73a0_boot_secondary(unsigned int cpu)
static int __cpuinit sh73a0_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
cpu = cpu_logical_map(cpu);
@ -91,7 +93,7 @@ int __cpuinit sh73a0_boot_secondary(unsigned int cpu)
return 0;
}
void __init sh73a0_smp_prepare_cpus(void)
static void __init sh73a0_smp_prepare_cpus(unsigned int max_cpus)
{
int cpu = cpu_logical_map(0);
@ -104,3 +106,41 @@ void __init sh73a0_smp_prepare_cpus(void)
/* enable cache coherency on CPU0 */
modify_scu_cpu_psr(0, 3 << (cpu * 8));
}
static void __init sh73a0_smp_init_cpus(void)
{
unsigned int ncores = sh73a0_get_core_count();
shmobile_smp_init_cpus(ncores);
}
static int __maybe_unused sh73a0_cpu_kill(unsigned int cpu)
{
int k;
/* this function is running on another CPU than the offline target,
* here we need wait for shutdown code in platform_cpu_die() to
* finish before asking SoC-specific code to power off the CPU core.
*/
for (k = 0; k < 1000; k++) {
if (shmobile_cpu_is_dead(cpu))
return 1;
mdelay(1);
}
return 0;
}
struct smp_operations sh73a0_smp_ops __initdata = {
.smp_init_cpus = sh73a0_smp_init_cpus,
.smp_prepare_cpus = sh73a0_smp_prepare_cpus,
.smp_secondary_init = sh73a0_secondary_init,
.smp_boot_secondary = sh73a0_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_kill = sh73a0_cpu_kill,
.cpu_die = shmobile_cpu_die,
.cpu_disable = shmobile_cpu_disable,
#endif
};