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[libcpu/c906]与virt同步 #9095

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Merged
BernardXiong merged 1 commit into from
Jun 26, 2024
Merged

[libcpu/c906]与virt同步 #9095

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25 changes: 23 additions & 2 deletions libcpu/risc-v/t-head/c906/riscv_mmu.h
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Original file line number Diff line number Diff line change
Expand Up @@ -131,6 +131,12 @@ rt_inline size_t rt_hw_mmu_attr_rm_perm(size_t attr, rt_base_t prot)
{
/* remove write permission for user */
case RT_HW_MMU_PROT_WRITE | RT_HW_MMU_PROT_USER:
attr &= ~PTE_W;
break;
/* remove write permission for kernel */
case RT_HW_MMU_PROT_WRITE | RT_HW_MMU_PROT_KERNEL:
attr &= ~PTE_W;
break;
default:
RT_ASSERT(0);
}
Expand All @@ -150,6 +156,8 @@ rt_inline size_t rt_hw_mmu_attr_add_perm(size_t attr, rt_base_t prot)
{
/* add write permission for user */
case RT_HW_MMU_PROT_WRITE | RT_HW_MMU_PROT_USER:
attr |= (PTE_R | PTE_W | PTE_U);
break;
default:
RT_ASSERT(0);
}
Expand All @@ -166,13 +174,26 @@ rt_inline size_t rt_hw_mmu_attr_add_perm(size_t attr, rt_base_t prot)
rt_inline rt_bool_t rt_hw_mmu_attr_test_perm(size_t attr, rt_base_t prot)
{
rt_bool_t rc = 0;
switch (prot)
switch (prot & ~RT_HW_MMU_PROT_USER)
{
/* test write permission for user */
case RT_HW_MMU_PROT_WRITE | RT_HW_MMU_PROT_USER:
case RT_HW_MMU_PROT_WRITE:
rc = ((attr & PTE_W) && (attr & PTE_R));
break;
case RT_HW_MMU_PROT_READ:
rc = !!(attr & PTE_R);
break;
case RT_HW_MMU_PROT_EXECUTE:
rc = !!(attr & PTE_X);
break;
default:
RT_ASSERT(0);
}

if (rc && (prot & RT_HW_MMU_PROT_USER))
{
rc = !!(attr & PTE_U);
}
return rc;
}

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