some big renames into subdirs of aspects

updated README
removed size_t in sys/types.h and sys/types.h itself, size_t is in stddef.h

1 files changed, 90 insertions, 0 deletions

diff --git a/src/hardware/interrupts.asm b/src/hardware/interrupts.asm
new file mode 100644
index 0000000..155b2af
--- /dev/null
+++ b/src/hardware/interrupts.asm
@@ -0,0 +1,90 @@
+[bits 32]
+
+global interrupts_enable
+global interrupts_disable
+global interrupts_load_idt
+extern interrupts_handle_static_interrupt
+
+; void interrupts_enable( void )
+interrupts_enable:
+	push ebp
+	mov ebp, esp
+	sti
+	leave
+	ret
+
+; void interrupts_disable( void )
+interrupts_disable:
+	push ebp
+	mov ebp, esp
+	cli
+	leave
+	ret
+
+; void interrupts_load_idt( interrupt_descriptor_table_pointer_t *idt_pointer )
+interrupts_load_idt:
+	push ebp
+	mov ebp, esp
+	mov ecx, [ebp+8]
+	lidt [ecx]
+	leave
+	ret
+        
+; the handler to ignore interrupts
+global interrupts_ignore_request
+interrupts_ignore_request:
+	iret
+	
+; void interrupts_handle_request_0x00( );
+%macro exception_stub 1
+global interrupts_handle_exception_%1
+interrupts_handle_exception_%1:
+	mov [interrupt_no], byte %1
+	jmp int_entry
+%endmacro
+
+exception_stub 0x00
+
+; IRQs and exceptions would normally collidate, that's why the
+; hardware interrupts must be transposed by an offset
+IRQ_BASE equ 0x20
+
+%macro irq_stub 1
+global interrupts_handle_irq_%1
+interrupts_handle_irq_%1:
+	mov [interrupt_no], byte IRQ_BASE + %1
+	jmp int_entry
+%endmacro
+
+irq_stub 0x00
+irq_stub 0x01
+irq_stub 0x0C
+
+int_entry:
+	; safe state of interrupted code
+	pusha
+	push ds
+	push es
+	push fs
+	push gs
+
+	; call the static C handler with the correct interrupt number
+	; uint32_t interrupts_handle_interrupt( uint8_t interrupt_no, uint32_t esp );
+	push esp
+	mov eax, [interrupt_no]
+	push eax
+	call interrupts_handle_static_interrupt
+	;add esp, 8
+	mov esp, eax
+
+	; restore state
+	pop gs
+	pop fs
+	pop es
+	pop ds
+	popa
+	
+	iret
+
+interrupt_no:
+	db 0