From 9f2d4561465b42f8cdc478ea5df44b93e12a90d9 Mon Sep 17 00:00:00 2001 From: Caleb Connolly Date: Fri, 9 Aug 2024 01:59:31 +0200 Subject: armv8: mmu: add a way to map additional regions In some cases we might want to map some memory region after enabling caches. Introduce a new helper for this. Reviewed-by: Neil Armstrong Signed-off-by: Caleb Connolly --- arch/arm/include/asm/system.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'arch/arm/include/asm/system.h') diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h index 7e30cac32a0..2237d7d0066 100644 --- a/arch/arm/include/asm/system.h +++ b/arch/arm/include/asm/system.h @@ -277,6 +277,16 @@ void protect_secure_region(void); void smp_kick_all_cpus(void); void flush_l3_cache(void); + +/** + * mmu_map_region() - map a region of previously unmapped memory. + * Will be mapped MT_NORMAL & PTE_BLOCK_INNER_SHARE. + * + * @start: Start address of the region + * @size: Size of the region + * @emerg: Also map the region in the emergency table + */ +void mmu_map_region(phys_addr_t start, u64 size, bool emerg); void mmu_change_region_attr(phys_addr_t start, size_t size, u64 attrs); /* -- cgit v1.2.3