diff options
author | Magnus Damm <damm@opensource.se> | 2013-02-18 13:47:54 (GMT) |
---|---|---|
committer | Simon Horman <horms+renesas@verge.net.au> | 2013-03-12 17:13:21 (GMT) |
commit | fd0865c3f7054d9068007fd280681cb4ea7929a1 (patch) | |
tree | b818b709e45828c8f934d9d505520f0d5a1dc060 /arch/arm/mach-shmobile/smp-r8a7779.c | |
parent | eebadd676499e4c8aee181a669cc8a386e308c31 (diff) | |
download | linux-fd0865c3f7054d9068007fd280681cb4ea7929a1.tar.xz |
ARM: shmobile: Rearrange r8a7779 cpu hotplug code
Update the r8a7779 SMP code and CPU Hotplug in particular
to follow the same style as sh73a0. This means dropping
__maybe_unused for #ifdef CONFIG_HOTPLUG_CPU.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'arch/arm/mach-shmobile/smp-r8a7779.c')
-rw-r--r-- | arch/arm/mach-shmobile/smp-r8a7779.c | 96 |
1 files changed, 49 insertions, 47 deletions
diff --git a/arch/arm/mach-shmobile/smp-r8a7779.c b/arch/arm/mach-shmobile/smp-r8a7779.c index bdd3809..ea4535a 100644 --- a/arch/arm/mach-shmobile/smp-r8a7779.c +++ b/arch/arm/mach-shmobile/smp-r8a7779.c @@ -66,16 +66,6 @@ void __init r8a7779_register_twd(void) } #endif -static int r8a7779_scu_psr_core_disabled(int cpu) -{ - unsigned long mask = 3 << (cpu * 8); - - if ((__raw_readl(shmobile_scu_base + 8) & mask) == mask) - return 1; - - return 0; -} - static int r8a7779_platform_cpu_kill(unsigned int cpu) { struct r8a7779_pm_ch *ch = NULL; @@ -92,43 +82,6 @@ static int r8a7779_platform_cpu_kill(unsigned int cpu) return ret ? ret : 1; } -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 (r8a7779_scu_psr_core_disabled(cpu)) - return r8a7779_platform_cpu_kill(cpu); - - mdelay(1); - } - - return 0; -} - -static void __maybe_unused r8a7779_cpu_die(unsigned int cpu) -{ - dsb(); - flush_cache_all(); - - /* disable cache coherency */ - scu_power_mode(shmobile_scu_base, SCU_PM_POWEROFF); - - /* Endless loop until power off from r8a7779_cpu_kill() */ - while (1) - cpu_do_idle(); -} - -static int __maybe_unused r8a7779_cpu_disable(unsigned int cpu) -{ - /* only CPU1->3 have power domains, do not allow hotplug of CPU0 */ - return cpu == 0 ? -EPERM : 0; -} - static void __cpuinit r8a7779_secondary_init(unsigned int cpu) { gic_secondary_init(0); @@ -176,6 +129,55 @@ static void __init r8a7779_smp_init_cpus(void) shmobile_smp_init_cpus(scu_get_core_count(shmobile_scu_base)); } +#ifdef CONFIG_HOTPLUG_CPU +static int r8a7779_scu_psr_core_disabled(int cpu) +{ + unsigned long mask = 3 << (cpu * 8); + + if ((__raw_readl(shmobile_scu_base + 8) & mask) == mask) + return 1; + + return 0; +} + +static int 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 (r8a7779_scu_psr_core_disabled(cpu)) + return r8a7779_platform_cpu_kill(cpu); + + mdelay(1); + } + + return 0; +} + +static void r8a7779_cpu_die(unsigned int cpu) +{ + dsb(); + flush_cache_all(); + + /* disable cache coherency */ + scu_power_mode(shmobile_scu_base, SCU_PM_POWEROFF); + + /* Endless loop until power off from r8a7779_cpu_kill() */ + while (1) + cpu_do_idle(); +} + +static int r8a7779_cpu_disable(unsigned int cpu) +{ + /* only CPU1->3 have power domains, do not allow hotplug of CPU0 */ + return cpu == 0 ? -EPERM : 0; +} +#endif /* CONFIG_HOTPLUG_CPU */ + struct smp_operations r8a7779_smp_ops __initdata = { .smp_init_cpus = r8a7779_smp_init_cpus, .smp_prepare_cpus = r8a7779_smp_prepare_cpus, |