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| author | Freya Murphy <freya@freyacat.org> | 2024-02-01 14:43:11 -0500 |
|---|---|---|
| committer | Freya Murphy <freya@freyacat.org> | 2024-02-01 14:43:11 -0500 |
| commit | 341c95f5357c451e2420fb81e64ec6b42c40e124 (patch) | |
| tree | 725afc747d5f0ca9ad4b5e8558f5f1cf178fae9b /src/arch | |
| parent | acpi, fix mboot memory map, fix kalloc, fix virtalloc node allocator, add kpr... (diff) | |
| download | corn-341c95f5357c451e2420fb81e64ec6b42c40e124.tar.gz corn-341c95f5357c451e2420fb81e64ec6b42c40e124.tar.bz2 corn-341c95f5357c451e2420fb81e64ec6b42c40e124.zip | |
update makefile
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/amd64/paging.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/arch/amd64/paging.c b/src/arch/amd64/paging.c index 3ea79f1..18eb079 100644 --- a/src/arch/amd64/paging.c +++ b/src/arch/amd64/paging.c @@ -88,6 +88,8 @@ load_pml4( void *phys ) { static struct pte *pt = &paging_pt[0]; + if ((uint64_t)phys >> 12 == pt->address) + return; pt->address = (uint64_t)phys >> 12; pt->flags = F_PRESENT | F_WRITEABLE; invlpg(pml4_mapped); @@ -98,6 +100,8 @@ load_pdpt( void *phys ) { static struct pte *pt = &paging_pt[1]; + if ((uint64_t)phys >> 12 == pt->address) + return; pt->address = (uint64_t)phys >> 12; pt->flags = F_PRESENT | F_WRITEABLE; invlpg(pdpt_mapped); @@ -108,6 +112,8 @@ load_pd( void *phys ) { static struct pte *pt = &paging_pt[2]; + if ((uint64_t)phys >> 12 == pt->address) + return; pt->address = (uint64_t)phys >> 12; pt->flags = F_PRESENT | F_WRITEABLE; invlpg(pdpt_mapped); @@ -118,6 +124,8 @@ load_pt( void *phys ) { static struct pte *pt = &paging_pt[3]; + if ((uint64_t)phys >> 12 == pt->address) + return; pt->address = (uint64_t)phys >> 12; pt->flags = F_PRESENT | F_WRITEABLE; invlpg(pt_mapped); |