Remove PIT code

Author: Ian Seyler

src/init/pit.asm

@@ -126,14 +126,7 @@ delay:
 	push rax
 	push rbx
 
-	mov rbx, [p_HPET_Address]	; Was HPET detected?
-	cmp rbx, 0
-	je delay_pit			; If not, use PIT for timing
 	call os_hpet_delay
-	jmp delay_done
-
-delay_pit:
-	call os_pit_delay
 
 delay_done:
 	pop rbx

src/init/smp.asm

@@ -23,22 +23,6 @@ interrupt_gate:				; handler for all other interrupts
 ; -----------------------------------------------------------------------------
 
 
-; -----------------------------------------------------------------------------
-; PIT interrupt. IRQ 0x00, INT 0x20
-align 16
-pit_irq:
-	push rax
-
-	inc qword [p_Counter_Timer]
-
-	mov al, 0x20			; Acknowledge the IRQ
-	out 0x20, al
-
-	pop rax
-	iretq
-; -----------------------------------------------------------------------------
-
-
 ; -----------------------------------------------------------------------------
 ; Floppy drive interrupt. IRQ 0x06, INT 0x26
 ; This IRQ runs when floppy drive reads from or writes to whole disk

src/interrupt.asm

@@ -770,27 +770,11 @@ pde_end:
 %endif
 
 ; Configure system timer
-; HPET is preferred but may not exist. If there was no ACPI table entry then use PIT
-
-	mov rax, [p_HPET_Address]
-	cmp rax, 0
-	jz skip_hpet
-
 	mov rsi, msg_hpet
 	call debug_msg
 	call init_hpet			; Configure the HPET
 	mov rsi, msg_ok
 	call debug_msg
-	jmp timer_done
-
-skip_hpet:
-	mov rsi, msg_pit
-	call debug_msg
-	call init_pit			; Configure the PIT
-	mov rsi, msg_ok
-	call debug_msg
-
-timer_done:
 
 %ifndef NOVIDEO
 ; Visual Debug (6/8)
@@ -991,7 +975,6 @@ clear_regs:
 %include "init/acpi.asm"
 %include "init/cpu.asm"
 %include "init/hpet.asm"
-%include "init/pit.asm"
 %include "init/serial.asm"
 %include "init/smp.asm"
 %ifdef BIOS