diff options
| author | Magnus Damm <damm@opensource.se> | 2012-01-10 17:44:39 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2012-01-12 11:00:27 +0900 |
| commit | f40aaf6da14a4043d6361e0c7d74ada18e866059 (patch) | |
| tree | 655a02f6a7a0ef50772c13c00fef992924bdeb78 /arch/arm/mach-shmobile/include | |
| parent | f0a217a31a745421df98db0d14ebdadef11d734c (diff) | |
| download | lwn-f40aaf6da14a4043d6361e0c7d74ada18e866059.tar.gz lwn-f40aaf6da14a4043d6361e0c7d74ada18e866059.zip | |
ARM: mach-shmobile: r8a7779 SMP support V3
This patch contains r8a7779 SMP support V3 - now including
CPU hotplug offine and online support. The r8a7779 power
domain code is tied together with SMP glue code which allows
us to control the power domains via CPU hotplug.
At this point the kernel boots with the 4 Cortex-A9 cores in
SMP mode and all CPU cores except CPU0 can be hotplugged.
The code in platsmp.c is quite far from pretty, but it is
kept like that intentionally to avoid creating layers of
code that will go away in the near future anyway. The code
needs to be updated when some per-SoC handling code will be
added to the ARM architecture, see the following patch for
more information:
"[RFC PATCH 0/3] Per SoC descriptor"
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/arm/mach-shmobile/include')
| -rw-r--r-- | arch/arm/mach-shmobile/include/mach/common.h | 6 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/include/mach/r8a7779.h | 3 |
2 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h index 44ce124bfdec..e4b945e271e7 100644 --- a/arch/arm/mach-shmobile/include/mach/common.h +++ b/arch/arm/mach-shmobile/include/mach/common.h @@ -68,4 +68,10 @@ extern void r8a7779_clock_init(void); extern void r8a7779_pinmux_init(void); extern void r8a7779_pm_init(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); + #endif /* __ARCH_MACH_COMMON_H */ diff --git a/arch/arm/mach-shmobile/include/mach/r8a7779.h b/arch/arm/mach-shmobile/include/mach/r8a7779.h index e6a6166fdf22..b07ad318eb2e 100644 --- a/arch/arm/mach-shmobile/include/mach/r8a7779.h +++ b/arch/arm/mach-shmobile/include/mach/r8a7779.h @@ -343,6 +343,9 @@ static inline struct r8a7779_pm_ch *to_r8a7779_ch(struct generic_pm_domain *d) return &container_of(d, struct r8a7779_pm_domain, genpd)->ch; } +extern int r8a7779_sysc_power_down(struct r8a7779_pm_ch *r8a7779_ch); +extern int r8a7779_sysc_power_up(struct r8a7779_pm_ch *r8a7779_ch); + #ifdef CONFIG_PM extern struct r8a7779_pm_domain r8a7779_sh4a; extern struct r8a7779_pm_domain r8a7779_sgx; |