patch-2.1.101 linux/arch/mips/dec/int-handler.S

• Lines: 261
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.1.100/linux/arch/mips/dec/int-handler.S
• Orig date: Thu Jun 26 12:33:36 1997

diff -u --recursive --new-file v2.1.100/linux/arch/mips/dec/int-handler.S linux/arch/mips/dec/int-handler.S
@@ -1,260 +0,0 @@
-/*
- * arch/mips/dec/int-handler.S
- *
- * Copyright (C) 1995, 1996 Paul M. Antoine
- *
- * Written by Ralf Baechle and Andreas Busse, modified for DECStation
- * support by Paul Antoine.
- *
- * NOTE: There are references to R4X00 code in here, because there is an
- *	 upgrade module for Personal DECStations with such a CPU!
- *
- * FIXME: still plenty to do in this file, as much of the code hasn't been
- *	  modified to suit the DECStation's interrupts.
- */
-#include <asm/asm.h>
-#include <asm/regdef.h>
-#include <asm/fpregdef.h>
-#include <asm/mipsconfig.h>
-#include <asm/mipsregs.h>
-#include <asm/stackframe.h>
-#include <asm/bootinfo.h>
-
-		.text
-		.set	noreorder
-/*
- * decstation_handle_int: Interrupt handler for Personal DECStation 5000/2x
- *
- * FIXME: this is *extremely* experimental, though it is probably o.k. for
- *	  most DECStation models.
- */
-		NESTED(decstation_handle_int, FR_SIZE, ra)
-		.set	noat
-		SAVE_ALL
-		CLI
-		.set	at
-
-		/*
-		 * Get pending interrupts
-		 */
-		mfc0	t0,CP0_CAUSE		# get pending interrupts
-		mfc0	t1,CP0_STATUS		# get enabled interrupts
-		and	t0,t1			# isolate allowed ones
-		andi	t0,0xff00		# isolate pending bits
-/*
- * FIXME: The following branch was:
- *					beqz	t0,spurious_interrupt
- *
- *	  ...but the wonders of ecoff cause the gas assembler (ver 2.5.1 )
- *	  to complain:
- *
- *		  "Can not represent relocation in this object file format"...
- *
- *	  hence this hack to branch foward a bit, and then jump <sigh>
- *	  Perhaps a later version of gas will cope? - Paul
- */
-		beqz	t0,3f;
-		sll	t0,16			# delay slot
-
-		/*
-		 * Find irq with highest priority
-		 * FIXME: This is slow
-		 */
-		la	t1,ll_vectors
-1:		bltz	t0,2f			# found pending irq
-		sll	t0,1
-		b	1b
-		subu	t1,PTRSIZE		# delay slot
-
-		/*
-		 * Do the low-level stuff
-		 */
-2:		lw	t0,(t1)
-		jr	t0
-		nop				# delay slot
-		END(decstation_handle_int)
-
-/*
- * FIXME: The hack mentioned above.
- */
-3:		j	spurious_interrupt
-		nop
-
-/*
- * FIXME: the rest of this is pretty suspect, as it's straight from
- * 	  jazz.S... and I really haven't altered it at all - Paul
- */
-
-/*
- * Used for keyboard driver's fake_keyboard_interrupt()
- * (Paul, even for i386 this is no longer being used -- Ralf)
- */
-ll_sw0:		li	s1,~IE_SW0
-		mfc0	t0,CP0_CAUSE
-		and	t0,s1
-		mtc0	t0,CP0_CAUSE
-	PRINT("sw0 received...\n")
-		li	t1,1
-		b	call_real
-		li	t3,PTRSIZE	# delay slot, re-map to irq level 1
-
-ll_sw1:		li	s1,~IE_SW1
-		PANIC("Unimplemented sw1 handler")
-
-loc_no_irq:	PANIC("Unimplemented loc_no_irq handler")
-loc_sound:	PANIC("Unimplemented loc_sound handler")
-loc_video:	PANIC("Unimplemented loc_video handler")
-loc_scsi:	PANIC("Unimplemented loc_scsi handler")
-
-/*
- * Ethernet interrupt, remapped to level 15
- * NOTE: Due to a bug somewhere in the kernel I was not able
- * to figure out, the PRINT() is necessary. Without this,
- * I get a "gfp called nonatomically from interrupt 00000000".
- * Only god knows why... Tell me if you find the reason!
- * Andy, 6/16/95
- */
-loc_ethernet:	PANIC("Unimplemented loc_ethernet\n")
-
-/*
- * Keyboard interrupt, remapped to level 1
- */
-loc_keyboard:	PANIC("Unimplemented loc_keyboard\n")
-
-loc_mouse:	PANIC("Unimplemented loc_mouse handler")
-
-/*
- * Serial port 1 IRQ, remapped to level 3
- */
-loc_serial1:	PANIC("Unimplemented loc_serial handler")
-
-/*
- * Serial port 2 IRQ, remapped to level 4
- */
-loc_serial2:	PANIC("Unimplemented loc_serial handler")
-
-/*
- * Parallel port IRQ, remapped to level 5
- */
-loc_parallel:	PANIC("Unimplemented loc_parallel handler")
-
-/*
- * Floppy IRQ, remapped to level 6
- */
-loc_floppy:	PANIC("Unimplemented loc_floppy handler")
-  
-/*
- * Now call the real handler
- */
-loc_call:	la	t0,IRQ_vectors			# delay slot
-
-		/*
-		 * Temporarily disable interrupt source
-		 */
-/*		lhu	t2,JAZZ_IO_IRQ_ENABLE
-*/
-		addu	t0,t3			# make ptr to IRQ handler
-		lw	t0,(t0)
-		and	t2,s1			# delay slot
-/*		sh	t2,JAZZ_IO_IRQ_ENABLE */
-		jalr	t0			# call IRQ handler
-		nor	s1,zero,s1		# delay slot
-
-		/*
-		 * Reenable interrupt
-		 */
-/*		lhu	t2,JAZZ_IO_IRQ_ENABLE */
-		or	t2,s1
-/*		sh	t2,JAZZ_IO_IRQ_ENABLE */
-
-		jr	v0
-		nop				# delay slot
-
-ll_tc3:		PANIC("Unimplemented tc3 interrupt handler")
-
-ll_fpu:		PANIC("Unimplemented fpu interrupt handler")
-
-ll_io_error:	PANIC("Unimplemented I/O write timeout interrupt handler")
-
-ll_rtc:		PANIC("Unimplemented RTC interrupt handler")
-
-/*
- * Timer IRQ
- * We remap the timer irq to be more similar to a IBM compatible
- */
-ll_timer:	PANIC("Timer interrupt!\n");
-/*
- * CPU count/compare IRQ (unused)
- */
-ll_reset:	li	a0,0
-		jal	pmax_halt
-		li	a1,0			# delay slot
-
-/*
- * Now call the real handler
- */
-call_real:	la	t0,IRQ_vectors			# delay slot
-
-		/*
-		 * temporarily disable interrupt
-		 */
-		mfc0	t2,CP0_STATUS
-		and	t2,s1
-
-		addu	t0,t3
-		lw	t0,(t0)
-		mtc0	t2,CP0_STATUS		# delay slot
-		jalr	t0
-		nor	s1,zero,s1		# delay slot
-
-		/*
-		 * reenable interrupt
-		 */
-		mfc0	t2,CP0_STATUS
-		or	t2,s1
-		mtc0	t2,CP0_STATUS
-
-		jr	v0
-		nop				# delay slot
-
-/*
- * Just for debugging... load a0 with address of the point inside the
- * framebuffer at which you want to draw a line of 16x32 pixels.
- * Maxine's framebuffer starts at 0xaa000000.
- */
-		.set	reorder
-		LEAF(drawline)
-		li	t1,0xffffffff		# set all pixels on
-		li	t2,0x10			# we will write 16 words
-1:		sw	t1,(a0)			# write the first word
-		addiu	a0,a0,4			# move our framebuffer pointer
-		addiu	t2,t2,-1		# one less to do
-		bnez	t2,1b			# finished?
-		jr 	ra
-		END(drawline)
-
-/*
- * FIXME: I have begun to alter this table to reflect Personal DECStation
- *	  (i.e. Maxine) interrupts... Paul.
- */
-		.data
-		PTR	ll_sw0			# SW0
-		PTR	ll_sw1			# SW1
-		PTR	ll_timer		# Periodic interrupt
-		PTR	ll_rtc			# RTC periodic interrupt
-		PTR	ll_io_error		# Timeout on I/O writes
-		PTR	ll_tc3			# TC slot 3, motherboard
-		PTR	ll_reset		# Halt keycode (CTRL+ALT+ENTER)
-ll_vectors:	PTR	ll_fpu			# FPU
-
-local_vector:	PTR	loc_no_irq
-		PTR	loc_parallel
-		PTR	loc_floppy
-		PTR	loc_sound
-		PTR	loc_video
-		PTR	loc_ethernet
-		PTR	loc_scsi
-		PTR	loc_keyboard
-		PTR	loc_mouse
-		PTR	loc_serial1
-		PTR	loc_serial2