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check for supervisor protection fault and issue a bus error

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This commit is contained in:
Markus Fröschle
2014-09-07 19:29:11 +00:00
parent 87bd9eb2c6
commit e7fa2b5bff
2 changed files with 10 additions and 1 deletions
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3
BaS_gcc/sys/mmu.c
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@@ -235,6 +235,7 @@ int mmu_map_page(uint32_t virt, uint32_t phys, enum mmu_page_size sz, const stru
MCF_MMU_MMUTR_ID(flags->page_id) | /* address space id (ASID) */
MCF_MMU_MMUTR_SG | /* shared global */
MCF_MMU_MMUTR_V; /* valid */
NOP();
MCF_MMU_MMUDR = ((int) phys & size_mask) | /* physical address */
MCF_MMU_MMUDR_SZ(sz) | /* page size */
@@ -243,9 +244,11 @@ int mmu_map_page(uint32_t virt, uint32_t phys, enum mmu_page_size sz, const stru
(flags->access & ACCESS_WRITE ? MCF_MMU_MMUDR_W : 0) | /* write access enable */
(flags->access & ACCESS_EXECUTE ? MCF_MMU_MMUDR_X : 0) | /* execute access enable */
(flags->locked ? MCF_MMU_MMUDR_LK : 0);
NOP();
MCF_MMU_MMUOR = MCF_MMU_MMUOR_ACC | /* access TLB, data */
MCF_MMU_MMUOR_UAA; /* update allocation address field */
NOP();
MCF_MMU_MMUOR = MCF_MMU_MMUOR_ITLB | /* instruction */
MCF_MMU_MMUOR_ACC | /* access TLB */