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Add pte getter to RISC-V MMU driver

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Like the title says, a getter to read one PTE.
This commit is contained in:
Ville Juven 2022-01-19 13:07:37 +02:00 committed by Xiang Xiao
parent c4b3672937
commit 56ade25f31
1 changed files with 22 additions and 4 deletions
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26
arch/risc-v/src/common/riscv_mmu.h
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@ -246,9 +246,9 @@ static inline void mmu_enable(uintptr_t pgbase, uint16_t asid)
* MMU implementation specific
* lnvaddr - The virtual address of the beginning of the page table at
* level n
* paddr - The physical address to be mapped. Must be aligned to a PPN
* paddr - The physical address to be mapped. Must be aligned to a PPN
* address boundary which is dependent on the level of the entry
* vaddr - Must be aligned to a PPN
* vaddr - The virtual address to be mapped. Must be aligned to a PPN
* address boundary which is dependent on the level of the entry
* mmuflags - The MMU flags to use in the mapping.
*
@ -257,6 +257,24 @@ static inline void mmu_enable(uintptr_t pgbase, uint16_t asid)
void mmu_ln_setentry(uint32_t ptlevel, uintptr_t lnvaddr, uintptr_t paddr,
uintptr_t vaddr, uint32_t mmuflags);
/****************************************************************************
* Name: mmu_ln_getentry
*
* Description:
* Get a level n translation table entry.
*
* Input Parameters:
* ptlevel - The translation table level, amount of levels is
* MMU implementation specific
* lnvaddr - The virtual address of the beginning of the page table at
* level n
* vaddr - The virtual address to get pte for. Must be aligned to a PPN
* address boundary which is dependent on the level of the entry
****************************************************************************/
uintptr_t mmu_ln_getentry(uint32_t ptlevel, uintptr_t lnvaddr,
uintptr_t vaddr);
/****************************************************************************
* Name: mmu_ln_map_region
*
@ -268,9 +286,9 @@ void mmu_ln_setentry(uint32_t ptlevel, uintptr_t lnvaddr, uintptr_t paddr,
* MMU implementation specific
* lnvaddr - The virtual address of the beginning of the page table at
* level n
* paddr - The physical address to be mapped. Must be aligned to a PPN
* paddr - The physical address to be mapped. Must be aligned to a PPN
* address boundary which is dependent on the level of the entry
* vaddr - Must be aligned to a PPN
* vaddr - The virtual address to be mapped. Must be aligned to a PPN
* address boundary which is dependent on the level of the entry
* size - The size of the region in bytes
* mmuflags - The MMU flags to use in the mapping.