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| author | Aleksa Vuckovic <aleksa@vuckovic.cc> | 2023-12-13 01:38:14 +0100 |
|---|---|---|
| committer | Aleksa Vuckovic <aleksa@vuckovic.cc> | 2024-04-02 23:17:31 +0200 |
| commit | 36137438446c1754a522c5b3cc3aff92c43ac1ee (patch) | |
| tree | f7358ef0aec7023321e52e116f94fba95e52611f /src/arch/riscv64/boot/entry.S | |
X86/X86_64 debug/release WORKING
riscv64 WORKING uart
idk
Diffstat (limited to 'src/arch/riscv64/boot/entry.S')
| -rw-r--r-- | src/arch/riscv64/boot/entry.S | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/arch/riscv64/boot/entry.S b/src/arch/riscv64/boot/entry.S new file mode 100644 index 0000000..f5fa092 --- /dev/null +++ b/src/arch/riscv64/boot/entry.S @@ -0,0 +1,37 @@ +.section .init + +.option norvc + +.type start, @function +.global start +start: + .cfi_startproc + +.option push +.option norelax + la gp, global_pointer +.option pop + + /* Reset satp */ + csrw satp, zero + + /* Setup stack */ + la sp, stack_top + + /* Clear the BSS section */ + la t5, bss_start + la t6, bss_end +bss_clear: + sd zero, (t5) + addi t5, t5, 8 + bltu t5, t6, bss_clear + + la t0, kernel_main + csrw sepc, t0 + + /* Jump to kernel! */ + tail kernel_main + + .cfi_endproc + +.end |