i386: Rearrange Interupt Handling

In preperation for full relocation

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>

8 files changed, 420 insertions, 310 deletions

diff --git a/cpu/i386/Makefile b/cpu/i386/Makefile
index e98bd3d..c658c6e 100644
--- a/cpu/i386/Makefile
+++ b/cpu/i386/Makefile
@@ -29,7 +29,7 @@ include $(TOPDIR)/config.mk
 LIB	= $(obj)lib$(CPU).a
 
 START	= start.o start16.o resetvec.o
-COBJS	= serial.o interrupts.o exceptions.o cpu.o
+COBJS	= serial.o interrupts.o cpu.o
 
 SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
diff --git a/cpu/i386/cpu.c b/cpu/i386/cpu.c
index d91e33b..8baf37d 100644
--- a/cpu/i386/cpu.c
+++ b/cpu/i386/cpu.c
@@ -48,7 +48,6 @@ int cpu_init(void)
 
 	/* Initialize core interrupt and exception functionality of CPU */
 	cpu_init_interrupts ();
-	cpu_init_exceptions ();
 
 	return 0;
 }
diff --git a/cpu/i386/exceptions.c b/cpu/i386/exceptions.c
deleted file mode 100644
index bc3d434..0000000
--- a/cpu/i386/exceptions.c
+++ /dev/null
@@ -1,229 +0,0 @@
-/*
- * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-#include <asm/interrupt.h>
-
-asm (".globl exp_return\n"
-     "exp_return:\n"
-     "     addl  $12, %esp\n"
-     "     pop   %esp\n"
-     "     popa\n"
-     "     iret\n");
-
-char exception_stack[4096];
-
-/*
- * For detailed description of each exception, refer to:
- * Intel® 64 and IA-32 Architectures Software Developer's Manual
- * Volume 1: Basic Architecture
- * Order Number: 253665-029US, November 2008
- * Table 6-1. Exceptions and Interrupts
- */
-DECLARE_EXCEPTION(0, divide_error_entry);
-DECLARE_EXCEPTION(1, debug_entry);
-DECLARE_EXCEPTION(2, nmi_interrupt_entry);
-DECLARE_EXCEPTION(3, breakpoint_entry);
-DECLARE_EXCEPTION(4, overflow_entry);
-DECLARE_EXCEPTION(5, bound_range_exceeded_entry);
-DECLARE_EXCEPTION(6, invalid_opcode_entry);
-DECLARE_EXCEPTION(7, device_not_available_entry);
-DECLARE_EXCEPTION(8, double_fault_entry);
-DECLARE_EXCEPTION(9, coprocessor_segment_overrun_entry);
-DECLARE_EXCEPTION(10, invalid_tss_entry);
-DECLARE_EXCEPTION(11, segment_not_present_entry);
-DECLARE_EXCEPTION(12, stack_segment_fault_entry);
-DECLARE_EXCEPTION(13, general_protection_entry);
-DECLARE_EXCEPTION(14, page_fault_entry);
-DECLARE_EXCEPTION(15, reserved_exception_entry);
-DECLARE_EXCEPTION(16, floating_point_error_entry);
-DECLARE_EXCEPTION(17, alignment_check_entry);
-DECLARE_EXCEPTION(18, machine_check_entry);
-DECLARE_EXCEPTION(19, simd_floating_point_exception_entry);
-DECLARE_EXCEPTION(20, reserved_exception_entry);
-DECLARE_EXCEPTION(21, reserved_exception_entry);
-DECLARE_EXCEPTION(22, reserved_exception_entry);
-DECLARE_EXCEPTION(23, reserved_exception_entry);
-DECLARE_EXCEPTION(24, reserved_exception_entry);
-DECLARE_EXCEPTION(25, reserved_exception_entry);
-DECLARE_EXCEPTION(26, reserved_exception_entry);
-DECLARE_EXCEPTION(27, reserved_exception_entry);
-DECLARE_EXCEPTION(28, reserved_exception_entry);
-DECLARE_EXCEPTION(29, reserved_exception_entry);
-DECLARE_EXCEPTION(30, reserved_exception_entry);
-DECLARE_EXCEPTION(31, reserved_exception_entry);
-
-__isr__ reserved_exception_entry(int cause, int ip, int seg)
-{
-	printf("Reserved Exception %d at %04x:%08x\n", cause, seg, ip);
-}
-
-__isr__ divide_error_entry(int cause, int ip, int seg)
-{
-	printf("Divide Error (Division by zero) at %04x:%08x\n", seg, ip);
-	while(1);
-}
-
-__isr__ debug_entry(int cause, int ip, int seg)
-{
-	printf("Debug Interrupt (Single step) at %04x:%08x\n", seg, ip);
-}
-
-__isr__ nmi_interrupt_entry(int cause, int ip, int seg)
-{
-	printf("NMI Interrupt at %04x:%08x\n", seg, ip);
-}
-
-__isr__ breakpoint_entry(int cause, int ip, int seg)
-{
-	printf("Breakpoint at %04x:%08x\n", seg, ip);
-}
-
-__isr__ overflow_entry(int cause, int ip, int seg)
-{
-	printf("Overflow at %04x:%08x\n", seg, ip);
-	while(1);
-}
-
-__isr__ bound_range_exceeded_entry(int cause, int ip, int seg)
-{
-	printf("BOUND Range Exceeded at %04x:%08x\n", seg, ip);
-	while(1);
-}
-
-__isr__ invalid_opcode_entry(int cause, int ip, int seg)
-{
-	printf("Invalid Opcode (UnDefined Opcode) at %04x:%08x\n", seg, ip);
-	while(1);
-}
-
-__isr__ device_not_available_entry(int cause, int ip, int seg)
-{
-	printf("Device Not Available (No Math Coprocessor) at %04x:%08x\n", seg, ip);
-	while(1);
-}
-
-__isr__ double_fault_entry(int cause, int ip, int seg)
-{
-	printf("Double fault at %04x:%08x\n", seg, ip);
-	while(1);
-}
-
-__isr__ coprocessor_segment_overrun_entry(int cause, int ip, int seg)
-{
-	printf("Co-processor segment overrun at %04x:%08x\n", seg, ip);
-	while(1);
-}
-
-__isr__ invalid_tss_entry(int cause, int ip, int seg)
-{
-	printf("Invalid TSS at %04x:%08x\n", seg, ip);
-}
-
-__isr__ segment_not_present_entry(int cause, int ip, int seg)
-{
-	printf("Segment Not Present at %04x:%08x\n", seg, ip);
-	while(1);
-}
-
-__isr__ stack_segment_fault_entry(int cause, int ip, int seg)
-{
-	printf("Stack Segment Fault at %04x:%08x\n", seg, ip);
-	while(1);
-}
-
-__isr__ general_protection_entry(int cause, int ip, int seg)
-{
-	printf("General Protection at %04x:%08x\n", seg, ip);
-}
-
-__isr__ page_fault_entry(int cause, int ip, int seg)
-{
-	printf("Page fault at %04x:%08x\n", seg, ip);
-	while(1);
-}
-
-__isr__ floating_point_error_entry(int cause, int ip, int seg)
-{
-	printf("Floating-Point Error (Math Fault) at %04x:%08x\n", seg, ip);
-}
-
-__isr__ alignment_check_entry(int cause, int ip, int seg)
-{
-	printf("Alignment check at %04x:%08x\n", seg, ip);
-}
-
-__isr__ machine_check_entry(int cause, int ip, int seg)
-{
-	printf("Machine Check at %04x:%08x\n", seg, ip);
-}
-
-__isr__ simd_floating_point_exception_entry(int cause, int ip, int seg)
-{
-	printf("SIMD Floating-Point Exception at %04x:%08x\n", seg, ip);
-}
-
-int cpu_init_exceptions(void)
-{
-	/* Just in case... */
-	disable_interrupts();
-
-	/* Setup exceptions */
-	set_vector(0x00, exp_0);
-	set_vector(0x01, exp_1);
-	set_vector(0x02, exp_2);
-	set_vector(0x03, exp_3);
-	set_vector(0x04, exp_4);
-	set_vector(0x05, exp_5);
-	set_vector(0x06, exp_6);
-	set_vector(0x07, exp_7);
-	set_vector(0x08, exp_8);
-	set_vector(0x09, exp_9);
-	set_vector(0x0a, exp_10);
-	set_vector(0x0b, exp_11);
-	set_vector(0x0c, exp_12);
-	set_vector(0x0d, exp_13);
-	set_vector(0x0e, exp_14);
-	set_vector(0x0f, exp_15);
-	set_vector(0x10, exp_16);
-	set_vector(0x11, exp_17);
-	set_vector(0x12, exp_18);
-	set_vector(0x13, exp_19);
-	set_vector(0x14, exp_20);
-	set_vector(0x15, exp_21);
-	set_vector(0x16, exp_22);
-	set_vector(0x17, exp_23);
-	set_vector(0x18, exp_24);
-	set_vector(0x19, exp_25);
-	set_vector(0x1a, exp_26);
-	set_vector(0x1b, exp_27);
-	set_vector(0x1c, exp_28);
-	set_vector(0x1d, exp_29);
-	set_vector(0x1e, exp_30);
-	set_vector(0x1f, exp_31);
-
-	/* It is now safe to enable interrupts */
-	enable_interrupts();
-
-	return 0;
-}
diff --git a/cpu/i386/interrupts.c b/cpu/i386/interrupts.c
index 063ea42..d80cfb1 100644
--- a/cpu/i386/interrupts.c
+++ b/cpu/i386/interrupts.c
@@ -1,4 +1,7 @@
 /*
+ * (C) Copyright 2008
+ * Graeme Russ, graeme.russ@gmail.com.
+ *
  * (C) Copyright 2002
  * Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
  *
@@ -24,6 +27,14 @@
 #include <common.h>
 #include <asm/interrupt.h>
 
+#define DECLARE_INTERRUPT(x) \
+	".globl irq_"#x"\n" \
+	"irq_"#x":\n" \
+	"pushl %ebp\n" \
+	"movl %esp,%ebp\n" \
+	"pusha\n" \
+	"pushl $"#x"\n" \
+	"jmp irq_common_entry\n"
 
 struct idt_entry {
 	u16	base_low;
@@ -33,23 +44,20 @@ struct idt_entry {
 	u16	base_high;
 } __attribute__ ((packed));
 
+struct desc_ptr {
+	unsigned short size;
+	unsigned long address;
+	unsigned short segment;
+} __attribute__((packed));
 
 struct idt_entry idt[256];
 
+struct desc_ptr idt_ptr;
 
-asm (".globl irq_return\n"
-     "irq_return:\n"
-     "     addl  $4, %esp\n"
-     "     popa\n"
-     "     iret\n");
-
-void __attribute__ ((regparm(0))) default_isr(void);
-asm ("default_isr: iret\n");
-
-asm ("idt_ptr:\n"
-	".word	0x800\n" /* size of the table 8*256 bytes */
-	".long	idt\n"	 /* offset */
-	".word	0x18\n");/* data segment */
+static inline void load_idt(const struct desc_ptr *dtr)
+{
+	asm volatile("cs lidt %0"::"m" (*dtr));
+}
 
 void set_vector(u8 intnum, void *routine)
 {
@@ -57,11 +65,16 @@ void set_vector(u8 intnum, void *routine)
 	idt[intnum].base_low = (u16)((u32)(routine + gd->reloc_off) & 0xffff);
 }
 
+void irq_0(void);
+void irq_1(void);
 
 int cpu_init_interrupts(void)
 {
 	int i;
 
+	int irq_entry_size = irq_1 - irq_0;
+	void *irq_entry = (void *)irq_0;
+
 	/* Just in case... */
 	disable_interrupts();
 
@@ -70,10 +83,15 @@ int cpu_init_interrupts(void)
 		idt[i].access = 0x8e;
 		idt[i].res = 0;
 		idt[i].selector = 0x10;
-		set_vector(i, default_isr);
+		set_vector(i, irq_entry);
+		irq_entry += irq_entry_size;
 	}
 
-	asm ("cs lidt idt_ptr\n");
+	idt_ptr.size = 256 * 8;
+	idt_ptr.address = (unsigned long) idt;
+	idt_ptr.segment = 0x18;
+
+	load_idt(&idt_ptr);
 
 	/* It is now safe to enable interrupts */
 	enable_interrupts();
@@ -81,6 +99,12 @@ int cpu_init_interrupts(void)
 	return 0;
 }
 
+void __do_irq(int irq)
+{
+	printf("Unhandled IRQ : %d\n", irq);
+}
+void do_irq(int irq) __attribute__((weak, alias("__do_irq")));
+
 void enable_interrupts(void)
 {
 	asm("sti\n");
@@ -94,3 +118,380 @@ int disable_interrupts(void)
 
 	return (flags&0x200); /* IE flags is bit 9 */
 }
+
+/* IRQ Low-Level Service Routine */
+__isr__ irq_llsr(int ip, int seg, int irq)
+{
+	/*
+	 * For detailed description of each exception, refer to:
+	 * Intel® 64 and IA-32 Architectures Software Developer's Manual
+	 * Volume 1: Basic Architecture
+	 * Order Number: 253665-029US, November 2008
+	 * Table 6-1. Exceptions and Interrupts
+	 */
+	switch (irq) {
+	case 0x00:
+		printf("Divide Error (Division by zero) at %04x:%08x\n", seg, ip);
+		while(1);
+		break;
+	case 0x01:
+		printf("Debug Interrupt (Single step) at %04x:%08x\n", seg, ip);
+		break;
+	case 0x02:
+		printf("NMI Interrupt at %04x:%08x\n", seg, ip);
+		break;
+	case 0x03:
+		printf("Breakpoint at %04x:%08x\n", seg, ip);
+		break;
+	case 0x04:
+		printf("Overflow at %04x:%08x\n", seg, ip);
+		while(1);
+		break;
+	case 0x05:
+		printf("BOUND Range Exceeded at %04x:%08x\n", seg, ip);
+		while(1);
+		break;
+	case 0x06:
+		printf("Invalid Opcode (UnDefined Opcode) at %04x:%08x\n", seg, ip);
+		while(1);
+		break;
+	case 0x07:
+		printf("Device Not Available (No Math Coprocessor) at %04x:%08x\n", seg, ip);
+		while(1);
+		break;
+	case 0x08:
+		printf("Double fault at %04x:%08x\n", seg, ip);
+		while(1);
+		break;
+	case 0x09:
+		printf("Co-processor segment overrun at %04x:%08x\n", seg, ip);
+		while(1);
+		break;
+	case 0x0a:
+		printf("Invalid TSS at %04x:%08x\n", seg, ip);
+		break;
+	case 0x0b:
+		printf("Segment Not Present at %04x:%08x\n", seg, ip);
+		while(1);
+		break;
+	case 0x0c:
+		printf("Stack Segment Fault at %04x:%08x\n", seg, ip);
+		while(1);
+		break;
+	case 0x0d:
+		printf("General Protection at %04x:%08x\n", seg, ip);
+		break;
+	case 0x0e:
+		printf("Page fault at %04x:%08x\n", seg, ip);
+		while(1);
+		break;
+	case 0x0f:
+		printf("Floating-Point Error (Math Fault) at %04x:%08x\n", seg, ip);
+		break;
+	case 0x10:
+		printf("Alignment check at %04x:%08x\n", seg, ip);
+		break;
+	case 0x11:
+		printf("Machine Check at %04x:%08x\n", seg, ip);
+		break;
+	case 0x12:
+		printf("SIMD Floating-Point Exception at %04x:%08x\n", seg, ip);
+		break;
+	case 0x13:
+	case 0x14:
+	case 0x15:
+	case 0x16:
+	case 0x17:
+	case 0x18:
+	case 0x19:
+	case 0x1a:
+	case 0x1b:
+	case 0x1c:
+	case 0x1d:
+	case 0x1e:
+	case 0x1f:
+		printf("Reserved Exception %d at %04x:%08x\n", irq, seg, ip);
+		break;
+
+	default:
+		/* Hardware or User IRQ */
+		do_irq(irq);
+	}
+}
+
+/*
+ * OK - This looks really horrible, but it serves a purpose - It helps create
+ * fully relocatable code.
+ *  - The call to irq_llsr will be a relative jump
+ *  - The IRQ entries will be guaranteed to be in order
+ * It's a bit annoying that we need to waste 3 bytes per interrupt entry
+ * (total of 768 code bytes), but we MUST create a Stack Frame and this is
+ * the easiest way I could do it. Maybe it can be made better later.
+ */
+asm(".globl irq_common_entry\n" \
+	"irq_common_entry:\n" \
+	"pushl $0\n" \
+	"pushl $0\n" \
+	"call irq_llsr\n" \
+	"popl %eax\n" \
+	"popl %eax\n" \
+	"popl %eax\n" \
+	"popa\n" \
+	"leave\n"\
+	"iret\n" \
+	DECLARE_INTERRUPT(0) \
+	DECLARE_INTERRUPT(1) \
+	DECLARE_INTERRUPT(2) \
+	DECLARE_INTERRUPT(3) \
+	DECLARE_INTERRUPT(4) \
+	DECLARE_INTERRUPT(5) \
+	DECLARE_INTERRUPT(6) \
+	DECLARE_INTERRUPT(7) \
+	DECLARE_INTERRUPT(8) \
+	DECLARE_INTERRUPT(9) \
+	DECLARE_INTERRUPT(10) \
+	DECLARE_INTERRUPT(11) \
+	DECLARE_INTERRUPT(12) \
+	DECLARE_INTERRUPT(13) \
+	DECLARE_INTERRUPT(14) \
+	DECLARE_INTERRUPT(15) \
+	DECLARE_INTERRUPT(16) \
+	DECLARE_INTERRUPT(17) \
+	DECLARE_INTERRUPT(18) \
+	DECLARE_INTERRUPT(19) \
+	DECLARE_INTERRUPT(20) \
+	DECLARE_INTERRUPT(21) \
+	DECLARE_INTERRUPT(22) \
+	DECLARE_INTERRUPT(23) \
+	DECLARE_INTERRUPT(24) \
+	DECLARE_INTERRUPT(25) \
+	DECLARE_INTERRUPT(26) \
+	DECLARE_INTERRUPT(27) \
+	DECLARE_INTERRUPT(28) \
+	DECLARE_INTERRUPT(29) \
+	DECLARE_INTERRUPT(30) \
+	DECLARE_INTERRUPT(31) \
+	DECLARE_INTERRUPT(32) \
+	DECLARE_INTERRUPT(33) \
+	DECLARE_INTERRUPT(34) \
+	DECLARE_INTERRUPT(35) \
+	DECLARE_INTERRUPT(36) \
+	DECLARE_INTERRUPT(37) \
+	DECLARE_INTERRUPT(38) \
+	DECLARE_INTERRUPT(39) \
+	DECLARE_INTERRUPT(40) \
+	DECLARE_INTERRUPT(41) \
+	DECLARE_INTERRUPT(42) \
+	DECLARE_INTERRUPT(43) \
+	DECLARE_INTERRUPT(44) \
+	DECLARE_INTERRUPT(45) \
+	DECLARE_INTERRUPT(46) \
+	DECLARE_INTERRUPT(47) \
+	DECLARE_INTERRUPT(48) \
+	DECLARE_INTERRUPT(49) \
+	DECLARE_INTERRUPT(50) \
+	DECLARE_INTERRUPT(51) \
+	DECLARE_INTERRUPT(52) \
+	DECLARE_INTERRUPT(53) \
+	DECLARE_INTERRUPT(54) \
+	DECLARE_INTERRUPT(55) \
+	DECLARE_INTERRUPT(56) \
+	DECLARE_INTERRUPT(57) \
+	DECLARE_INTERRUPT(58) \
+	DECLARE_INTERRUPT(59) \
+	DECLARE_INTERRUPT(60) \
+	DECLARE_INTERRUPT(61) \
+	DECLARE_INTERRUPT(62) \
+	DECLARE_INTERRUPT(63) \
+	DECLARE_INTERRUPT(64) \
+	DECLARE_INTERRUPT(65) \
+	DECLARE_INTERRUPT(66) \
+	DECLARE_INTERRUPT(67) \
+	DECLARE_INTERRUPT(68) \
+	DECLARE_INTERRUPT(69) \
+	DECLARE_INTERRUPT(70) \
+	DECLARE_INTERRUPT(71) \
+	DECLARE_INTERRUPT(72) \
+	DECLARE_INTERRUPT(73) \
+	DECLARE_INTERRUPT(74) \
+	DECLARE_INTERRUPT(75) \
+	DECLARE_INTERRUPT(76) \
+	DECLARE_INTERRUPT(77) \
+	DECLARE_INTERRUPT(78) \
+	DECLARE_INTERRUPT(79) \
+	DECLARE_INTERRUPT(80) \
+	DECLARE_INTERRUPT(81) \
+	DECLARE_INTERRUPT(82) \
+	DECLARE_INTERRUPT(83) \
+	DECLARE_INTERRUPT(84) \
+	DECLARE_INTERRUPT(85) \
+	DECLARE_INTERRUPT(86) \
+	DECLARE_INTERRUPT(87) \
+	DECLARE_INTERRUPT(88) \
+	DECLARE_INTERRUPT(89) \
+	DECLARE_INTERRUPT(90) \
+	DECLARE_INTERRUPT(91) \
+	DECLARE_INTERRUPT(92) \
+	DECLARE_INTERRUPT(93) \
+	DECLARE_INTERRUPT(94) \
+	DECLARE_INTERRUPT(95) \
+	DECLARE_INTERRUPT(97) \
+	DECLARE_INTERRUPT(96) \
+	DECLARE_INTERRUPT(98) \
+	DECLARE_INTERRUPT(99) \
+	DECLARE_INTERRUPT(100) \
+	DECLARE_INTERRUPT(101) \
+	DECLARE_INTERRUPT(102) \
+	DECLARE_INTERRUPT(103) \
+	DECLARE_INTERRUPT(104) \
+	DECLARE_INTERRUPT(105) \
+	DECLARE_INTERRUPT(106) \
+	DECLARE_INTERRUPT(107) \
+	DECLARE_INTERRUPT(108) \
+	DECLARE_INTERRUPT(109) \
+	DECLARE_INTERRUPT(110) \
+	DECLARE_INTERRUPT(111) \
+	DECLARE_INTERRUPT(112) \
+	DECLARE_INTERRUPT(113) \
+	DECLARE_INTERRUPT(114) \
+	DECLARE_INTERRUPT(115) \
+	DECLARE_INTERRUPT(116) \
+	DECLARE_INTERRUPT(117) \
+	DECLARE_INTERRUPT(118) \
+	DECLARE_INTERRUPT(119) \
+	DECLARE_INTERRUPT(120) \
+	DECLARE_INTERRUPT(121) \
+	DECLARE_INTERRUPT(122) \
+	DECLARE_INTERRUPT(123) \
+	DECLARE_INTERRUPT(124) \
+	DECLARE_INTERRUPT(125) \
+	DECLARE_INTERRUPT(126) \
+	DECLARE_INTERRUPT(127) \
+	DECLARE_INTERRUPT(128) \
+	DECLARE_INTERRUPT(129) \
+	DECLARE_INTERRUPT(130) \
+	DECLARE_INTERRUPT(131) \
+	DECLARE_INTERRUPT(132) \
+	DECLARE_INTERRUPT(133) \
+	DECLARE_INTERRUPT(134) \
+	DECLARE_INTERRUPT(135) \
+	DECLARE_INTERRUPT(136) \
+	DECLARE_INTERRUPT(137) \
+	DECLARE_INTERRUPT(138) \
+	DECLARE_INTERRUPT(139) \
+	DECLARE_INTERRUPT(140) \
+	DECLARE_INTERRUPT(141) \
+	DECLARE_INTERRUPT(142) \
+	DECLARE_INTERRUPT(143) \
+	DECLARE_INTERRUPT(144) \
+	DECLARE_INTERRUPT(145) \
+	DECLARE_INTERRUPT(146) \
+	DECLARE_INTERRUPT(147) \
+	DECLARE_INTERRUPT(148) \
+	DECLARE_INTERRUPT(149) \
+	DECLARE_INTERRUPT(150) \
+	DECLARE_INTERRUPT(151) \
+	DECLARE_INTERRUPT(152) \
+	DECLARE_INTERRUPT(153) \
+	DECLARE_INTERRUPT(154) \
+	DECLARE_INTERRUPT(155) \
+	DECLARE_INTERRUPT(156) \
+	DECLARE_INTERRUPT(157) \
+	DECLARE_INTERRUPT(158) \
+	DECLARE_INTERRUPT(159) \
+	DECLARE_INTERRUPT(160) \
+	DECLARE_INTERRUPT(161) \
+	DECLARE_INTERRUPT(162) \
+	DECLARE_INTERRUPT(163) \
+	DECLARE_INTERRUPT(164) \
+	DECLARE_INTERRUPT(165) \
+	DECLARE_INTERRUPT(166) \
+	DECLARE_INTERRUPT(167) \
+	DECLARE_INTERRUPT(168) \
+	DECLARE_INTERRUPT(169) \
+	DECLARE_INTERRUPT(170) \
+	DECLARE_INTERRUPT(171) \
+	DECLARE_INTERRUPT(172) \
+	DECLARE_INTERRUPT(173) \
+	DECLARE_INTERRUPT(174) \
+	DECLARE_INTERRUPT(175) \
+	DECLARE_INTERRUPT(176) \
+	DECLARE_INTERRUPT(177) \
+	DECLARE_INTERRUPT(178) \
+	DECLARE_INTERRUPT(179) \
+	DECLARE_INTERRUPT(180) \
+	DECLARE_INTERRUPT(181) \
+	DECLARE_INTERRUPT(182) \
+	DECLARE_INTERRUPT(183) \
+	DECLARE_INTERRUPT(184) \
+	DECLARE_INTERRUPT(185) \
+	DECLARE_INTERRUPT(186) \
+	DECLARE_INTERRUPT(187) \
+	DECLARE_INTERRUPT(188) \
+	DECLARE_INTERRUPT(189) \
+	DECLARE_INTERRUPT(190) \
+	DECLARE_INTERRUPT(191) \
+	DECLARE_INTERRUPT(192) \
+	DECLARE_INTERRUPT(193) \
+	DECLARE_INTERRUPT(194) \
+	DECLARE_INTERRUPT(195) \
+	DECLARE_INTERRUPT(196) \
+	DECLARE_INTERRUPT(197) \
+	DECLARE_INTERRUPT(198) \
+	DECLARE_INTERRUPT(199) \
+	DECLARE_INTERRUPT(200) \
+	DECLARE_INTERRUPT(201) \
+	DECLARE_INTERRUPT(202) \
+	DECLARE_INTERRUPT(203) \
+	DECLARE_INTERRUPT(204) \
+	DECLARE_INTERRUPT(205) \
+	DECLARE_INTERRUPT(206) \
+	DECLARE_INTERRUPT(207) \
+	DECLARE_INTERRUPT(208) \
+	DECLARE_INTERRUPT(209) \
+	DECLARE_INTERRUPT(210) \
+	DECLARE_INTERRUPT(211) \
+	DECLARE_INTERRUPT(212) \
+	DECLARE_INTERRUPT(213) \
+	DECLARE_INTERRUPT(214) \
+	DECLARE_INTERRUPT(215) \
+	DECLARE_INTERRUPT(216) \
+	DECLARE_INTERRUPT(217) \
+	DECLARE_INTERRUPT(218) \
+	DECLARE_INTERRUPT(219) \
+	DECLARE_INTERRUPT(220) \
+	DECLARE_INTERRUPT(221) \
+	DECLARE_INTERRUPT(222) \
+	DECLARE_INTERRUPT(223) \
+	DECLARE_INTERRUPT(224) \
+	DECLARE_INTERRUPT(225) \
+	DECLARE_INTERRUPT(226) \
+	DECLARE_INTERRUPT(227) \
+	DECLARE_INTERRUPT(228) \
+	DECLARE_INTERRUPT(229) \
+	DECLARE_INTERRUPT(230) \
+	DECLARE_INTERRUPT(231) \
+	DECLARE_INTERRUPT(232) \
+	DECLARE_INTERRUPT(233) \
+	DECLARE_INTERRUPT(234) \
+	DECLARE_INTERRUPT(235) \
+	DECLARE_INTERRUPT(236) \
+	DECLARE_INTERRUPT(237) \
+	DECLARE_INTERRUPT(238) \
+	DECLARE_INTERRUPT(239) \
+	DECLARE_INTERRUPT(240) \
+	DECLARE_INTERRUPT(241) \
+	DECLARE_INTERRUPT(242) \
+	DECLARE_INTERRUPT(243) \
+	DECLARE_INTERRUPT(244) \
+	DECLARE_INTERRUPT(245) \
+	DECLARE_INTERRUPT(246) \
+	DECLARE_INTERRUPT(247) \
+	DECLARE_INTERRUPT(248) \
+	DECLARE_INTERRUPT(249) \
+	DECLARE_INTERRUPT(250) \
+	DECLARE_INTERRUPT(251) \
+	DECLARE_INTERRUPT(252) \
+	DECLARE_INTERRUPT(253) \
+	DECLARE_INTERRUPT(254) \
+	DECLARE_INTERRUPT(255));
diff --git a/include/asm-i386/interrupt.h b/include/asm-i386/interrupt.h
index 7f408cb..3e2674a 100644
--- a/include/asm-i386/interrupt.h
+++ b/include/asm-i386/interrupt.h
@@ -43,31 +43,4 @@ extern char exception_stack[];
 
 #define __isr__ void __attribute__ ((regparm(0)))
 
-#define DECLARE_INTERRUPT(x) \
-	asm(".globl irq_"#x"\n" \
-		    "irq_"#x":\n" \
-		    "pusha \n" \
-		    "pushl $"#x"\n" \
-		    "pushl $irq_return\n" \
-		    "jmp   do_irq\n"); \
-	__isr__ irq_##x(void)
-
-#define DECLARE_EXCEPTION(x, f) \
-	asm(".globl exp_"#x"\n" \
-		    "exp_"#x":\n" \
-		    "pusha \n" \
-		    "movl     %esp, %ebx\n" \
-		    "movl     $exception_stack, %eax\n" \
-		    "movl     %eax, %esp \n" \
-		    "pushl    %ebx\n" \
-		    "movl     32(%esp), %ebx\n" \
-		    "xorl     %edx, %edx\n" \
-		    "movw     36(%esp), %dx\n" \
-		    "pushl    %edx\n" \
-		    "pushl    %ebx\n" \
-		    "pushl    $"#x"\n" \
-		    "pushl    $exp_return\n" \
-		    "jmp      "#f"\n"); \
-	__isr__ exp_##x(void)
-
 #endif
diff --git a/include/asm-i386/u-boot-i386.h b/include/asm-i386/u-boot-i386.h
index 3921e01..dfec307 100644
--- a/include/asm-i386/u-boot-i386.h
+++ b/include/asm-i386/u-boot-i386.h
@@ -55,9 +55,6 @@ int timer_init(void);
 /* cpu/.../interrupts.c */
 int cpu_init_interrupts(void);
 
-/* cpu/.../exceptions.c */
-int cpu_init_exceptions(void);
-
 /* board/.../... */
 int board_init(void);
 int dram_init(void);
diff --git a/lib_i386/interrupts.c b/lib_i386/interrupts.c
index 3f3613a..efbad72 100644
--- a/lib_i386/interrupts.c
+++ b/lib_i386/interrupts.c
@@ -109,8 +109,10 @@ void irq_free_handler(int irq)
 	return;
 }
 
-__isr__ do_irq(int irq)
+void do_irq(int hw_irq)
 {
+	int irq = hw_irq - 0x20;
+
 	if (irq < 0 || irq >= CONFIG_SYS_NUM_IRQS) {
 		printf("do_irq: bad irq number %d\n", irq);
 		return;
diff --git a/lib_i386/pcat_interrupts.c b/lib_i386/pcat_interrupts.c
index f01298e..67e6e97 100644
--- a/lib_i386/pcat_interrupts.c
+++ b/lib_i386/pcat_interrupts.c
@@ -40,45 +40,12 @@
 #error "CONFIG_SYS_NUM_IRQS must equal 16 if CONFIG_SYS_NUM_IRQS is defined"
 #endif
 
-DECLARE_INTERRUPT(0);
-DECLARE_INTERRUPT(1);
-DECLARE_INTERRUPT(3);
-DECLARE_INTERRUPT(4);
-DECLARE_INTERRUPT(5);
-DECLARE_INTERRUPT(6);
-DECLARE_INTERRUPT(7);
-DECLARE_INTERRUPT(8);
-DECLARE_INTERRUPT(9);
-DECLARE_INTERRUPT(10);
-DECLARE_INTERRUPT(11);
-DECLARE_INTERRUPT(12);
-DECLARE_INTERRUPT(13);
-DECLARE_INTERRUPT(14);
-DECLARE_INTERRUPT(15);
-
 int interrupt_init(void)
 {
 	u8 i;
 
 	disable_interrupts();
 
-	/* Setup interrupts */
-	set_vector(0x20, irq_0);
-	set_vector(0x21, irq_1);
-	set_vector(0x23, irq_3);
-	set_vector(0x24, irq_4);
-	set_vector(0x25, irq_5);
-	set_vector(0x26, irq_6);
-	set_vector(0x27, irq_7);
-	set_vector(0x28, irq_8);
-	set_vector(0x29, irq_9);
-	set_vector(0x2a, irq_10);
-	set_vector(0x2b, irq_11);
-	set_vector(0x2c, irq_12);
-	set_vector(0x2d, irq_13);
-	set_vector(0x2e, irq_14);
-	set_vector(0x2f, irq_15);
-
 	/* Mask all interrupts */
 	outb(0xff, MASTER_PIC + IMR);
 	outb(0xff, SLAVE_PIC + IMR);