erebion/coreboot
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

arm64: Add mmu context save/restore APIs

Browse source 
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>
This commit is contained in:
T Michael Turney 2018-04-25 14:49:49 -07:00 • committed by Patrick Georgi
commit 6e0f0f7f9c
2 changed files with 43 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

9
src/arch/arm64/include/armv8/arch/mmu.h
View file

@ -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!). */