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arm:allow to lookup physical addresses of sections.

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Change-Id: If4716b81cceee5d8b30d5f103b772b0ac99fc807
This commit is contained in:
Kees Jongenburger 2013-09-25 10:36:07 +02:00 committed by Gerrit Code Review
parent 6595e79da8
commit a88bc73e4c
1 changed files with 4 additions and 4 deletions
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8
kernel/arch/earm/memory.c
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@ -309,17 +309,17 @@ int vm_lookup(const struct proc *proc, const vir_bytes virtual,
assert(pde >= 0 && pde < ARM_VM_DIR_ENTRIES); assert(pde >= 0 && pde < ARM_VM_DIR_ENTRIES);
pde_v = phys_get32((u32_t) (root + pde)); pde_v = phys_get32((u32_t) (root + pde));
if(!(pde_v & ARM_VM_PDE_PRESENT)) { if(! ((pde_v & ARM_VM_PDE_PRESENT)
|| (pde_v & ARM_VM_SECTION_PRESENT)
)) {
return EFAULT; return EFAULT;
} }
/* We don't expect to ever see this.
* LSC Impossible with the previous test.
if(pde_v & ARM_VM_SECTION) { if(pde_v & ARM_VM_SECTION) {
*physical = pde_v & ARM_VM_SECTION_MASK; *physical = pde_v & ARM_VM_SECTION_MASK;
if(ptent) *ptent = pde_v; if(ptent) *ptent = pde_v;
*physical += virtual & ARM_VM_OFFSET_MASK_1MB; *physical += virtual & ARM_VM_OFFSET_MASK_1MB;
} else */ { } else {
/* Retrieve page table entry. */ /* Retrieve page table entry. */
pt = (u32_t *) (pde_v & ARM_VM_PDE_MASK); pt = (u32_t *) (pde_v & ARM_VM_PDE_MASK);
assert(!((u32_t) pt % ARM_PAGETABLE_SIZE)); assert(!((u32_t) pt % ARM_PAGETABLE_SIZE));