From de885d147ad2c4a66777e3557440247efde1cc8d Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Tue, 27 Nov 2012 23:11:20 -0500 Subject: ARM: mcpm: add a simple poke mechanism to the early entry code This allows to poke a predetermined value into a specific address upon entering the early boot code in bL_head.S. Signed-off-by: Nicolas Pitre --- arch/arm/common/mcpm_entry.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'arch/arm/common/mcpm_entry.c') diff --git a/arch/arm/common/mcpm_entry.c b/arch/arm/common/mcpm_entry.c index 370236dd1a03..4a2b32fd53a1 100644 --- a/arch/arm/common/mcpm_entry.c +++ b/arch/arm/common/mcpm_entry.c @@ -27,6 +27,18 @@ void mcpm_set_entry_vector(unsigned cpu, unsigned cluster, void *ptr) sync_cache_w(&mcpm_entry_vectors[cluster][cpu]); } +extern unsigned long mcpm_entry_early_pokes[MAX_NR_CLUSTERS][MAX_CPUS_PER_CLUSTER][2]; + +void mcpm_set_early_poke(unsigned cpu, unsigned cluster, + unsigned long poke_phys_addr, unsigned long poke_val) +{ + unsigned long *poke = &mcpm_entry_early_pokes[cluster][cpu][0]; + poke[0] = poke_phys_addr; + poke[1] = poke_val; + __cpuc_flush_dcache_area((void *)poke, 8); + outer_clean_range(__pa(poke), __pa(poke + 2)); +} + static const struct mcpm_platform_ops *platform_ops; int __init mcpm_platform_register(const struct mcpm_platform_ops *ops) -- cgit v1.2.3-59-g8ed1b