patch-2.4.4 linux/arch/mips/ite-boards/generic/int-handler.S

• Lines: 62
• Date: Fri Apr 13 20:26:07 2001
• Orig file: v2.4.3/linux/arch/mips/ite-boards/generic/int-handler.S
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/arch/mips/ite-boards/generic/int-handler.S linux/arch/mips/ite-boards/generic/int-handler.S
@@ -0,0 +1,61 @@
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+	.text
+	.set    macro
+	.set    noat
+	.align	5
+
+NESTED(it8172_IRQ, PT_SIZE, sp)
+	SAVE_ALL
+	CLI				# Important: mark KERNEL mode !
+
+        /* We're working with 'reorder' set at this point. */
+	/*
+	 * 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, 3f                  # spurious interrupt
+
+        andi    a0, t0, CAUSEF_IP7
+        beq     a0, zero, 1f
+        move    a0, sp
+        jal     mips_timer_interrupt
+	j	ret_from_irq
+        nop
+        
+1:
+        andi    a0, t0, CAUSEF_IP2      # the only int we expect at this time
+        beq     a0, zero, 3f           
+	move	a0,sp  
+	jal	it8172_hw0_irqdispatch
+
+	mfc0	t0,CP0_STATUS		# disable interrupts
+	ori	t0,1
+	xori	t0,1
+	mtc0	t0,CP0_STATUS
+        nop
+        nop
+        nop
+	
+	la      a1, ret_from_irq
+	jr	a1
+        nop
+	
+3:	
+	move a0, sp
+	jal	mips_spurious_interrupt
+        nop
+	la      a1, ret_from_irq
+	jr	a1
+        nop
+
+END(it8172_IRQ)
+