patch-2.1.44 linux/arch/mips/kernel/magnum4000.S

• Lines: 276
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.1.43/linux/arch/mips/kernel/magnum4000.S
• Orig date: Wed Dec 13 02:39:43 1995

diff -u --recursive --new-file v2.1.43/linux/arch/mips/kernel/magnum4000.S linux/arch/mips/kernel/magnum4000.S
@@ -1,275 +0,0 @@
-/*
- * arch/mips/kernel/magnum4000.S
- *
- * Copyright (C) 1995 Waldorf Electronics
- * written by Ralf Baechle and Andreas Busse
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/jazz.h>
-#include <asm/stackframe.h>
-
-/*
- * mips_magnum_4000_handle_int: Interrupt handler for Mips Magnum 4000 
- */
-		.set	noreorder
-
-		NESTED(mips_magnum_4000_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
-		beqz	t0,spurious_interrupt
-		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(mips_magnum_4000_handle_int)
-
-/*
- * Used for keyboard driver's fake_keyboard_interrupt()
- */
-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")
-
-ll_local_dma:	li	s1,~IE_IRQ0
-		PANIC("Unimplemented local_dma handler")
-
-ll_local_dev:	lbu	t0,JAZZ_IO_IRQ_SOURCE
-#if __mips == 3
-		dsll	t0,1
-		ld	t0,local_vector(t0)
-#else /* 32 bit */
-		lw	t0,local_vector(t0)
-#endif
-		jr	t0
-		nop
-
-
-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")
-
-/*
- * Keyboard interrupt handler
- */
-loc_keyboard:	li	s1,~JAZZ_IE_KEYBOARD
-		li	t1,JAZZ_KEYBOARD_IRQ
-		b	loc_call
-		li	t3,PTRSIZE*JAZZ_KEYBOARD_IRQ	# delay slot
-
-/*
- * Ethernet interrupt handler, remapped to level 2
- */
-loc_ethernet: /*	PRINT ("ethernet IRQ\n"); */
-		li	s1,~JAZZ_IE_ETHERNET
-		li	t1,JAZZ_ETHERNET_IRQ
- 		b	loc_call
-		li	t3,PTRSIZE*JAZZ_ETHERNET_IRQ 	# delay slot
-
-
-loc_mouse:	PANIC("Unimplemented loc_mouse handler")
-
-/*
- * Serial port 1 IRQ, remapped to level 3
- */
-loc_serial1:	li	s1,~JAZZ_IE_SERIAL1
-		li	t1,JAZZ_SERIAL1_IRQ
- 		b	loc_call
-		li	t3,PTRSIZE*JAZZ_SERIAL1_IRQ 	# delay slot
-
-/*
- * Serial port 2 IRQ, remapped to level 4
- */
-loc_serial2:	li	s1,~JAZZ_IE_SERIAL2
-		li	t1,JAZZ_SERIAL2_IRQ
- 		b	loc_call
-		li	t3,PTRSIZE*JAZZ_SERIAL2_IRQ 	# delay slot
-
-/*
- * Parallel port IRQ, remapped to level 5
- */
-loc_parallel:	li	s1,~JAZZ_IE_PARALLEL
-		li	t1,JAZZ_PARALLEL_IRQ
- 		b	loc_call
-		li	t3,PTRSIZE*JAZZ_PARALLEL_IRQ 	# delay slot
-
-/*
- * Floppy IRQ, remapped to level 6
- */
-loc_floppy:	li	s1,~JAZZ_IE_FLOPPY
-		li	t1,JAZZ_FLOPPY_IRQ
- 		b	loc_call
-		li	t3,PTRSIZE*JAZZ_FLOPPY_IRQ 	# delay slot
-
-/*
- * Now call the real handler
- */
-loc_call:	lui	s3,%hi(intr_count)
-		lw	t2,%lo(intr_count)(s3)
-		la	t0,IRQ_vectors			# delay slot
-		addiu	t2,1
-		sw	t2,%lo(intr_count)(s3)
-
-		/*
-		 * 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
-		lw	t1,%lo(intr_count)(s3)		# delay slot
-		or	t2,s1
-		sh	t2,JAZZ_IO_IRQ_ENABLE
-
-		subu	t1,1
-		jr	v0
-		sw	t1,%lo(intr_count)(s3)
-
-ll_eisa_irq:	li	s1,~IE_IRQ2
-		PANIC("Unimplemented eisa_irq handler")
-
-ll_eisa_nmi:	li	s1,~IE_IRQ3
-		PANIC("Unimplemented eisa_nmi handler")
-
-/*
- * Timer IRQ
- * We remap the timer irq to be more similar to a IBM compatible
- */
-ll_timer:	lw	t0,JAZZ_TIMER_REGISTER # timer irq cleared on read
-		li	s1,~IE_IRQ4
-		li	t1,0
-		b	call_real
-		li	t3,0		# delay slot, re-map to irq level 0
-
-/*
- * CPU count/compare IRQ (unused)
- */
-ll_count:	j	return
-		mtc0	zero,CP0_COMPARE
-
-/*
- * Now call the real handler
- */
-call_real:	lui	s3,%hi(intr_count)
-		lw	t2,%lo(intr_count)(s3)
-		la	t0,IRQ_vectors			# delay slot
-		addiu	t2,1
-		sw	t2,%lo(intr_count)(s3)
-
-		/*
-		 * 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
-
-		lw	t2,%lo(intr_count)(s3)
-		subu	t2,1
-
-		jr	v0
-		sw	t2,%lo(intr_count)(s3)
-
-/*
- * Just for debugging...
- */
-		LEAF(drawline)
-		li	t1,0xffffffff
-		li	t2,0x100
-1:		sw	t1,(a0)
-		addiu	a0,a0,4
-		addiu	t2,t2,-1
-		bnez	t2,1b
-		nop
-		jr 	ra
-		nop
-		END(drawline)
-
-
-		.data
-		PTR	ll_sw0			# SW0
-		PTR	ll_sw1			# SW1
-		PTR	ll_local_dma		# Local DMA
-		PTR	ll_local_dev		# Local devices
-		PTR	ll_eisa_irq		# EISA IRQ
-		PTR	ll_eisa_nmi		# EISA NMI
-		PTR	ll_timer		# Timer
-ll_vectors:	PTR	ll_count		# Count/Compare IRQ
-
-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
-
-		.align	5
-LEAF(spurious_interrupt)
-		/*
-		 * Nothing happened... (whistle)
-		 */
-		lui	t1,%hi(spurious_count)
-		lw	t0,%lo(spurious_count)(t1)
-		la	v0,return
-		addiu	t0,1
-		jr	ra
-		sw	t0,%lo(spurious_count)(t1)
-		END(spurious_interrupt)
-