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ARM: shmobile: Rearrange r8a7779 cpu hotplug code

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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>
This commit is contained in:
Magnus Damm 2013-02-18 22:47:54 +09:00 committed by Simon Horman
parent eebadd6764
commit fd0865c3f7
1 changed files with 49 additions and 47 deletions
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96
arch/arm/mach-shmobile/smp-r8a7779.c
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@ -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,