ADD: CoreBoot, also comes with my reimplementation of libfdt, which is just a dumb rewrite.

Signed-off-by: Amlal <amlal.elmahrouss@icloud.com>

3 files changed, 63 insertions, 0 deletions

diff --git a/src/amd64/amd64-boot.asm b/src/amd64/amd64-boot.asm
new file mode 100644
index 0000000..bcd6058
--- /dev/null
+++ b/src/amd64/amd64-boot.asm
@@ -0,0 +1,40 @@
+;; AMD64 CoreBoot Master Boot Program.
+;; Written by Amlal EL Mahrouss
+
+%define ENTRYPOINT 0x00FF
+
+[bits 16]
+[org ENTRYPOINT]
+
+amd64_bios_start:
+    cli
+    cld
+
+    mov ax, cs
+    mov ds, ax
+    mov es, ax
+    mov ss, ax
+    mov fs, ax
+
+    jmp amd64_bios_programmable_area
+    jmp 0x0000:0x7c00
+    jmp $
+
+amd64_vendor_information:
+    db "ZKA", 0
+    dw 0x010
+amd64_vendor_information_end:
+
+amd64_bios_programmable_area:
+    times 1024 nop
+    ret
+amd64_bios_programmable_area_end:
+
+times 2048-13-($-$$) nop
+
+;; SIZE: 13 Bytes.
+;; PURPOSE: BIOS Computer Metadata
+amd64_bios_entrypoint_area:
+    dw ENTRYPOINT ;; ENTRYPOINT.
+    db "13/21/2024" ;; DATE.
+    db 0x01 ;; VERSION.
diff --git a/src/amd64/amd64-test.asm b/src/amd64/amd64-test.asm
new file mode 100644
index 0000000..2a8bef8
--- /dev/null
+++ b/src/amd64/amd64-test.asm
@@ -0,0 +1,19 @@
+;; AMD64 CoreBoot Sample program.
+;; Written by Amlal EL Mahrouss
+
+[bits 16]
+[org 0x7c00]
+
+; --------------
+; Main entrypoint, just loop.
+; --------------
+amd64_main:
+    jmp $
+    cli
+    hlt
+
+times 512-6-2-2-($-$$) nop
+
+db "BOOT1", 0 ;; Payload
+dw 0x0100 ;; Version 1
+dw 0 ;; Binary Blob
diff --git a/src/amd64/amd64.sh b/src/amd64/amd64.sh
new file mode 100755
index 0000000..ea9efa0
--- /dev/null
+++ b/src/amd64/amd64.sh
@@ -0,0 +1,4 @@
+#! /bin/sh
+
+nasm amd64-boot.asm -f bin -o amd64-boot.rom
+nasm amd64-test.asm -f bin -o amd64-test.bin