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| author | Freya Murphy <freya@freyacat.org> | 2024-01-29 13:22:50 -0500 |
|---|---|---|
| committer | Freya Murphy <freya@freyacat.org> | 2024-01-29 13:22:50 -0500 |
| commit | e71a141533c742d05c0612d3a87ffb3810a4b5de (patch) | |
| tree | 06f8b5f8d33b287e8443caa65dea4abb64a5d3c4 /src/arch/amd64/boot.S | |
| parent | changes (diff) | |
| download | corn-e71a141533c742d05c0612d3a87ffb3810a4b5de.tar.gz corn-e71a141533c742d05c0612d3a87ffb3810a4b5de.tar.bz2 corn-e71a141533c742d05c0612d3a87ffb3810a4b5de.zip | |
memory works
Diffstat (limited to 'src/arch/amd64/boot.S')
| -rw-r--r-- | src/arch/amd64/boot.S | 37 |
1 files changed, 21 insertions, 16 deletions
diff --git a/src/arch/amd64/boot.S b/src/arch/amd64/boot.S index 447ac2f..6482d79 100644 --- a/src/arch/amd64/boot.S +++ b/src/arch/amd64/boot.S @@ -1,9 +1,10 @@ global start -global pml4_list -global init_pdpt -global init_pd -global init_pt +global kernel_pml4 +global kernel_pdpt_0 +global kernel_pd_0 +global kernel_pt_0 global paging_pt +global bootstrap_pt extern kmain extern amd64_shim bits 32 @@ -25,15 +26,17 @@ mb_end: section .bss align 4096 -pml4_list: ; reserve memory for initial 512 pml4 entires +kernel_pml4: ; reserve memory for initial 512 pml4 entires resb 4096 -init_pdpt: ; reserve memory for initial 512 pdpt entires +kernel_pdpt_0: ; reserve memory for initial 512 pdpt entires resb 4096 -init_pd: ; reserve memory for initial 512 pd entries +kernel_pd_0: ; reserve memory for initial 512 pd entries resb 4096 -init_pt: ; reserve memory for initial 512 pt entries +kernel_pt_0: ; reserve memory for initial 512 pt entries resb 4096 -paging_pt: ; reserve memory for 512 paging reserved pt entires +paging_pt: ; reserve pages for pager mappings + resb 4096 +bootstrap_pt: ; reserve pages to bootstrap pager resb 4096 align 16 @@ -85,6 +88,7 @@ start: mov esp, stack_end mov ebp, stack_end + push DWORD 0 push ebx mov edi, 0x1000 @@ -93,13 +97,13 @@ start: mov ecx, 4096 rep stosd mov edi, cr3 - ; FIXME: Update boot.S to point base of paging to pml4e_list, see above - mov DWORD [edi], 0x2003 ; Set the uint32_t at the destination index to 0x2003. - add edi, 0x1000 ; Add 0x1000 to the destination index. - mov DWORD [edi], 0x3003 ; Set the uint32_t at the destination index to 0x3003. - add edi, 0x1000 ; Add 0x1000 to the destination index. - mov DWORD [edi], 0x4003 ; Set the uint32_t at the destination index to 0x4003. - add edi, 0x1000 ; Add 0x1000 to the destination index. + + mov DWORD [edi], kernel_pdpt_0 + 3 ; Set the uint32_t at the destination index to 0x2003. + mov edi, kernel_pdpt_0 ; Add 0x1000 to the destination index. + mov DWORD [edi], kernel_pd_0 + 3 ; Set the uint32_t at the destination index to 0x3003. + mov edi, kernel_pd_0 ; Add 0x1000 to the destination index. + mov DWORD [edi], kernel_pt_0 + 3 ; Set the uint32_t at the destination index to 0x4003. + mov edi, kernel_pt_0 ; Add 0x1000 to the destination index. mov ebx, 0x00000003 ; Set the B-register to 0x00000003. mov ecx, 512 ; Set the C-register to 512. @@ -132,6 +136,7 @@ start: bits 64 code64: + pop rdi call amd64_shim mov rdi, rax call kmain |