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author | Nicolas Pitre <nicolas.pitre@linaro.org> | 2014-11-29 03:19:42 +0100 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-12-03 16:00:06 +0000 |
commit | 216b4688cc351e97514c40dbedd14f67ce59639a (patch) | |
tree | 980ac81ceae2c317f772057885a504d612b764fb /arch/arm/include/asm/mcpm.h | |
parent | 1f92f77ab68a012638afa9e001b7a1e1e5197930 (diff) | |
download | linux-216b4688cc351e97514c40dbedd14f67ce59639a.tar.bz2 |
ARM: 8240/1: MCPM: document mcpm_sync_init()
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/mcpm.h')
-rw-r--r-- | arch/arm/include/asm/mcpm.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/include/asm/mcpm.h b/arch/arm/include/asm/mcpm.h index d428e386c88e..3446f6a1d9fa 100644 --- a/arch/arm/include/asm/mcpm.h +++ b/arch/arm/include/asm/mcpm.h @@ -219,6 +219,23 @@ void __mcpm_outbound_leave_critical(unsigned int cluster, int state); bool __mcpm_outbound_enter_critical(unsigned int this_cpu, unsigned int cluster); int __mcpm_cluster_state(unsigned int cluster); +/** + * mcpm_sync_init - Initialize the cluster synchronization support + * + * @power_up_setup: platform specific function invoked during very + * early CPU/cluster bringup stage. + * + * This prepares memory used by vlocks and the MCPM state machine used + * across CPUs that may have their caches active or inactive. Must be + * called only after a successful call to mcpm_platform_register(). + * + * The power_up_setup argument is a pointer to assembly code called when + * the MMU and caches are still disabled during boot and no stack space is + * available. The affinity level passed to that code corresponds to the + * resource that needs to be initialized (e.g. 1 for cluster level, 0 for + * CPU level). Proper exclusion mechanisms are already activated at that + * point. + */ int __init mcpm_sync_init( void (*power_up_setup)(unsigned int affinity_level)); |