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riscv/mmu: Implement mmu_ln_clear

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Implement procedure to clear a mapping from MMU
This commit is contained in:
Ville Juven 2022-11-16 14:34:43 +02:00 committed by Xiang Xiao
parent 85470adcc3
commit 5c29042ab4
1 changed files with 19 additions and 0 deletions
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19
arch/risc-v/src/common/riscv_mmu.h
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@ -363,6 +363,25 @@ uintptr_t mmu_ln_getentry(uint32_t ptlevel, uintptr_t lnvaddr,
void mmu_ln_restore(uint32_t ptlevel, uintptr_t lnvaddr, uintptr_t vaddr,
uintptr_t entry);
/****************************************************************************
* Name: mmu_ln_clear
*
* Description:
* Unmap 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
*
****************************************************************************/
#define mmu_ln_clear(ptlevel, lnvaddr, vaddr) \
mmu_ln_restore(ptlevel, lnvaddr, vaddr, 0)
/****************************************************************************
* Name: mmu_ln_map_region
*