diff options
Diffstat (limited to 'arch/x86_64/boot/limine/framebuffer.c')
| -rw-r--r-- | arch/x86_64/boot/limine/framebuffer.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/arch/x86_64/boot/limine/framebuffer.c b/arch/x86_64/boot/limine/framebuffer.c index aa93496..ea7c714 100644 --- a/arch/x86_64/boot/limine/framebuffer.c +++ b/arch/x86_64/boot/limine/framebuffer.c @@ -2,6 +2,7 @@ #include "jove.h" #include "config.h" #include "hal/framebuffer.h" +#include "lib/string.h" #include "lib/printf.h" /*We don't know the size of the framebuffer until runtime, but at the same @@ -14,6 +15,7 @@ #define FRAMEBUFFER_MAX_GIANTPAGES ((FRAMEBUFFER_MAX_HUGEPAGES + 511) / 512) PAGEALIGN static page_t fb_pml2[FRAMEBUFFER_MAX_GIANTPAGES][512]; +PAGEALIGN static page_t fb_pml1[FRAMEBUFFER_MAX_HUGEPAGES][512]; extern page_t _kernel_pml3[512]; @@ -21,6 +23,9 @@ void* fb_remap(uintptr_t fb_address, size_t fb_bytes) { + memset(fb_pml2, 0, 0x1000 * FRAMEBUFFER_MAX_GIANTPAGES); + memset(fb_pml1, 0, 0x1000 * FRAMEBUFFER_MAX_HUGEPAGES); + fb_address &= ~IDENT_VIRT_BASE; size_t fb_pages = (fb_bytes + 4095) >> 12; size_t fb_hugepages = (fb_pages + 511) >> 9; @@ -32,15 +37,22 @@ fb_remap(uintptr_t fb_address, } for(size_t pml2 = 0; pml2 < fb_giantpages; pml2++) { - uintptr_t fb_pml2_pptr = KPTR_TOPHYS((uintptr_t)fb_pml2[pml2]); + uintptr_t fb_pml2_pptr = KPTR_TOPHYS(&fb_pml2[pml2]); _kernel_pml3[pml2].value = fb_pml2_pptr | PAGE_PRESENT | PAGE_GLOBAL | PAGE_WRITEABLE; } for(size_t pml1 = 0; pml1 < fb_hugepages; pml1++) { size_t pml2 = pml1 >> 9; size_t pml1_mod = pml1 % 512; - uintptr_t fb_off = fb_address + (pml1 << 21); - fb_pml2[pml2][pml1_mod].value = fb_off | PAGE_PRESENT | PAGE_GLOBAL | PAGE_WRITEABLE | PAGE_PS; + uintptr_t pml1_pptr = KPTR_TOPHYS(&fb_pml1[pml1]); + fb_pml2[pml2][pml1_mod].value = pml1_pptr | PAGE_PRESENT | PAGE_GLOBAL | PAGE_WRITEABLE; + } + + for(size_t pml0 = 0; pml0 < fb_pages; pml0++) { + size_t pml1 = pml0 >> 9; + size_t pml0_mod = pml0 % 512; + uintptr_t pml0_pptr = fb_address + (pml0 << 12); + fb_pml1[pml1][pml0_mod].value = pml0_pptr | PAGE_PRESENT | PAGE_GLOBAL | PAGE_WRITEABLE; } uintptr_t fb_virt = IDENT_VIRT_BASE | (511ULL << PMLI_SHL(3)); |