1 files changed, 323 insertions, 0 deletions
diff --git a/dev/zka/HALKit/AMD64/HalInterruptAPI.asm b/dev/zka/HALKit/AMD64/HalInterruptAPI.asm
new file mode 100644
index 00000000..cdbb2d1f
--- /dev/null
+++ b/dev/zka/HALKit/AMD64/HalInterruptAPI.asm
@@ -0,0 +1,323 @@
+;; /*
+;; *    ---------------------------------------------------
+;; *
+;; * 	Copyright ZKA Technologies., all rights reserved.
+;; *
+;; *    File: HalInterruptAPI.asm
+;; *    Purpose: Interrupt API, redirect raw interrupts into their handlers.
+;; *
+;; *    ---------------------------------------------------
+;; */
+
+[bits 64]
+
+%define kInterruptId 0x21
+
+%macro IntExp 1
+global __ZKA_INT_%1
+__ZKA_INT_%1:
+    cld
+    o64 iret
+%endmacro
+
+%macro IntNormal 1
+global __ZKA_INT_%1
+__ZKA_INT_%1:
+    cld
+    o64 iret
+%endmacro
+
+; This file handles the core interrupt table
+; Last edited 31/01/24
+
+global ke_handle_irq
+global kInterruptVectorTable
+
+extern idt_handle_gpf
+extern idt_handle_pf
+extern ke_io_write
+extern idt_handle_ud
+extern idt_handle_generic
+
+section .text
+
+IntNormal 0
+IntNormal 1
+
+IntNormal 2
+
+IntNormal 3
+IntNormal 4
+IntNormal 5
+
+;; Invalid opcode interrupt
+__ZKA_INT_6:
+    cld
+
+    push rax
+
+    mov rcx, rsp
+    call idt_handle_ud
+
+    pop rax
+
+    std
+    o64 iret
+
+IntNormal 7
+
+;; Invalid opcode interrupt
+__ZKA_INT_8:
+    cld
+
+    push rax
+
+    mov rcx, rsp
+    call idt_handle_generic
+
+    pop rax
+
+    std
+    o64 iret
+
+IntNormal 9
+IntExp   10
+IntExp   11
+
+IntExp 12
+
+__ZKA_INT_13:
+    cld
+
+    push rax
+
+    mov rcx, rsp
+    call idt_handle_gpf
+
+    pop rax
+
+    std
+    o64 iret
+
+__ZKA_INT_14:
+    cld
+
+    push rax
+
+    mov rcx, rsp
+    call idt_handle_pf
+
+    pop rax
+
+    std
+    o64 iret
+
+IntNormal 15
+IntNormal 16
+IntExp 17
+IntNormal 18
+IntNormal 19
+IntNormal 20
+IntNormal 21
+
+IntNormal 22
+
+IntNormal 23
+IntNormal 24
+IntNormal 25
+IntNormal 26
+IntNormal 27
+IntNormal 28
+IntNormal 29
+IntExp    30
+IntNormal 31
+IntNormal 32
+IntNormal 33
+IntNormal 34
+IntNormal 35
+IntNormal 36
+IntNormal 37
+IntNormal 38
+IntNormal 39
+IntNormal 40
+
+IntNormal 41
+
+IntNormal 42
+IntNormal 43
+IntNormal 44
+IntNormal 45
+IntNormal 46
+IntNormal 47
+IntNormal 48
+IntNormal 49
+
+[extern hal_system_call_enter]
+[extern hal_kernel_call_enter]
+
+__ZKA_INT_50:
+    cld
+
+    push r8
+    push r9
+    push r10
+    push rsp
+
+    jmp hal_system_call_enter
+
+    add rsp, 16
+    pop rsp
+    pop r10
+    pop r9
+    pop r8
+
+    std
+    o64 iret
+
+__ZKA_INT_51:
+    cld
+
+    push rcx
+    push rdx
+    push r8
+    push r9
+    push rax
+
+    call hal_kernel_call_enter
+
+    pop rax
+    pop r9
+    pop r8
+    pop rdx
+    pop rcx
+
+    std
+    o64 iret
+
+[extern hal_on_ap_startup]
+
+PRESENT        equ 1 << 7
+NOT_SYS        equ 1 << 4
+EXEC           equ 1 << 3
+DC             equ 1 << 2
+RW             equ 1 << 1
+ACCESSED       equ 1 << 0
+
+; Flags bits
+GRAN_4K       equ 1 << 7
+SZ_32         equ 1 << 6
+LONG_MODE     equ 1 << 5
+
+__ZKA_INT_52:
+    cld
+    jmp hal_on_ap_startup
+    std
+    ret
+
+IntNormal 53
+IntNormal 54
+IntNormal 55
+IntNormal 56
+IntNormal 57
+IntNormal 58
+IntNormal 59
+IntNormal 60
+
+%assign i 61
+%rep 195
+    IntNormal i
+%assign i i+1
+%endrep
+
+section .text
+
+[global hal_load_gdt]
+
+hal_load_gdt:
+    cld
+
+    lgdt [rcx]
+
+    mov ax, 0x10
+    mov ds, ax
+    mov es, ax
+    mov fs, ax
+    mov gs, ax
+    mov ss, ax
+
+    mov rax, 0x08
+    push rax
+    push hal_reload_segments
+
+    o64 retf
+
+extern hal_real_init
+
+hal_reload_segments:
+    std
+    ;; Write address of syscall handler.
+
+	mov rdx, [mp_system_call_handler]
+    shr rdx, 32
+	mov rcx, 0xC0000082
+    wrmsr
+
+    ;; Set segments of syscall handler.
+
+    xor rax, rax
+    mov rdx, 0x230008
+    mov rcx, 0xC0000081
+    wrmsr
+
+    mov ecx, 0xC0000080
+    rdmsr
+    or eax, 1
+    wrmsr
+
+    jmp hal_real_init
+    ret
+
+global hal_load_idt
+global hal_user_code_start
+
+extern hal_system_call_enter
+global mp_system_call_handler
+
+mp_system_call_handler:
+
+    push r8
+    push r9
+    push r10
+    push r11
+    push r12
+    push r13
+    push r14
+    push r15
+
+    jmp hal_system_call_enter
+
+    pop r15
+    pop r14
+    pop r13
+    pop r12
+    pop r11
+    pop r10
+    pop r9
+    pop r8
+
+    o64 sysret
+
+hal_load_idt:
+    cld
+    lidt [rcx]
+    std
+    ret
+
+section .data
+
+kInterruptVectorTable:
+    %assign i 0
+    %rep 256
+        dq __ZKA_INT_%+i
+    %assign i i+1
+    %endrep