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| author | T Michael Turney <mturney@codeaurora.org> | 2018-04-25 14:49:49 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2018-04-30 06:25:15 +0000 |
| commit | 6e0f0f7f9c91f41eb40f4ef6979937caee168bdf (patch) | |
| tree | ead474907ea6f7b4bd0af1cf65d01803d4ec8d2a /src/arch/arm64/include | |
| parent | 7850b5836bfe250f31cc32ca3cde70077fcbd887 (diff) | |
| download | coreboot-6e0f0f7f9c91f41eb40f4ef6979937caee168bdf.tar.xz | |
arm64: Add mmu context save/restore APIs
New API required by sdm845 DDR init/training protocol
TEST=build & run
Change-Id: I8442442c0588dd6fb5e461b399e48a761f7bbf29
Signed-off-by: T Michael Turney <mturney@codeaurora.org>
Reviewed-on: https://review.coreboot.org/25818
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Diffstat (limited to 'src/arch/arm64/include')
| -rw-r--r-- | src/arch/arm64/include/armv8/arch/mmu.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/arch/arm64/include/armv8/arch/mmu.h b/src/arch/arm64/include/armv8/arch/mmu.h index f0e551e52d..6c83749e95 100644 --- a/src/arch/arm64/include/armv8/arch/mmu.h +++ b/src/arch/arm64/include/armv8/arch/mmu.h @@ -148,8 +148,17 @@ #define TCR_TBI_USED (0x0 << TCR_TBI_SHIFT) #define TCR_TBI_IGNORED (0x1 << TCR_TBI_SHIFT) +struct mmu_context { + uint64_t mair; /* MAIR attributes */ + uint64_t tcr; /* TCR Attributes */ +}; + /* Initialize MMU registers and page table memory region. */ void mmu_init(void); +/* Desc : Save mmu context (registers and ttbr base/size). */ +void mmu_save_context(struct mmu_context *mmu_context); +/* Desc : Restore mmu context using input backed-up context */ +void mmu_restore_context(const struct mmu_context *mmu_context); /* Change a memory type for a range of bytes at runtime. */ void mmu_config_range(void *start, size_t size, uint64_t tag); /* Enable the MMU (need previous mmu_init() and configured ranges!). */ |