Add ARM946E cpu and core module targets; remap memory to 0x00000000

Patch by Peter Pearse, 2 Feb 2005

5 files changed, 723 insertions, 0 deletions

diff --git a/cpu/arm_intcm/Makefile b/cpu/arm_intcm/Makefile
new file mode 100644
index 0000000..203278e
--- /dev/null
+++ b/cpu/arm_intcm/Makefile
@@ -0,0 +1,43 @@
+#
+# (C) Copyright 2000-2003
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# 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 $(TOPDIR)/config.mk
+
+LIB	= lib$(CPU).a
+
+START	= start.o
+OBJS	= interrupts.o cpu.o
+
+all:	.depend $(START) $(LIB)
+
+$(LIB):	$(OBJS)
+	$(AR) crv $@ $(OBJS)
+
+#########################################################################
+
+.depend:	Makefile $(START:.o=.S) $(OBJS:.o=.c)
+		$(CC) -M $(CFLAGS) $(START:.o=.S) $(OBJS:.o=.c) > $@
+
+sinclude .depend
+
+#########################################################################
diff --git a/cpu/arm_intcm/config.mk b/cpu/arm_intcm/config.mk
new file mode 100644
index 0000000..81ca288
--- /dev/null
+++ b/cpu/arm_intcm/config.mk
@@ -0,0 +1,27 @@
+#
+# (C) Copyright 2002
+# Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
+#
+# 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
+#
+
+PLATFORM_RELFLAGS += -fno-strict-aliasing  -fno-common -ffixed-r8 \
+	 -msoft-float
+
+PLATFORM_CPPFLAGS +=  -march=armv4
diff --git a/cpu/arm_intcm/cpu.c b/cpu/arm_intcm/cpu.c
new file mode 100644
index 0000000..34cd5af
--- /dev/null
+++ b/cpu/arm_intcm/cpu.c
@@ -0,0 +1,91 @@
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
+ *
+ * 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
+ */
+
+/*
+ * CPU specific code for an unknown cpu
+ * - hence fairly empty......
+ */
+
+#include <common.h>
+#include <command.h>
+
+int cpu_init (void)
+{
+	/*
+	 * setup up stacks if necessary
+	 */
+#ifdef CONFIG_USE_IRQ
+	DECLARE_GLOBAL_DATA_PTR;
+
+	IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4;
+	FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
+#endif
+	return 0;
+}
+
+int cleanup_before_linux (void)
+{
+	/*
+	 * this function is called just before we call linux
+	 * it prepares the processor for linux
+	 *
+	 * we turn off caches etc ...
+	 */
+
+	disable_interrupts ();
+
+	/* Since the CM has unknown processor we do not support 
+	 * cache operations 
+	 */
+
+	return (0);
+}
+
+int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	extern void reset_cpu (ulong addr);
+
+	disable_interrupts ();
+	reset_cpu (0);
+	/*NOTREACHED*/
+	return (0);
+}
+
+/* May not be cahed processor on the CM - do nothing */
+void icache_enable (void)
+{
+}
+
+void icache_disable (void)
+{
+}
+
+/* return "disabled" */
+int icache_status (void)
+{
+	return 0;
+}
diff --git a/cpu/arm_intcm/interrupts.c b/cpu/arm_intcm/interrupts.c
new file mode 100644
index 0000000..e41ac5a
--- /dev/null
+++ b/cpu/arm_intcm/interrupts.c
@@ -0,0 +1,192 @@
+/*
+ * (C) Copyright 2003
+ * Texas Instruments <www.ti.com>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.de>
+ *
+ * (C) Copyright 2002-2004
+ * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
+ *
+ * (C) Copyright 2004
+ * Philippe Robin, ARM Ltd. <philippe.robin@arm.com>
+ *
+ * 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/proc-armv/ptrace.h>
+
+#ifndef CONFIG_INTEGRATOR
+/* Only to be used for integrator/AP or /CP */
+/* Allows U-Boot to be used with any ARM supplied core module (CM), 
+ * provided the ARM boot monitor, or similar software,
+ * runs first to set up the platform e.g. map writeable memory to 0x00000000
+ * - see Integrator User Guides
+ * Versatile has a supported cpu - arm926ejs
+ * Some integrator CMs cpus are supported
+ * CM926EJ-S, CM946E-S
+ * For platforms with supported cpus U-Boot can be used as the sole boot 
+ * monitor/loader - it will configure the platform itself
+ * Also U-Boot may be faster/smaller in those cases since specific 
+ * qualities of the cpu and/or CM can be used e.g i and/or d caches etc.
+ */
+#endif
+extern void reset_cpu(ulong addr);
+
+#ifdef CONFIG_USE_IRQ
+/* enable IRQ interrupts */
+void enable_interrupts (void)
+{
+	unsigned long temp;
+	__asm__ __volatile__("mrs %0, cpsr\n"
+			     "bic %0, %0, #0x80\n"
+			     "msr cpsr_c, %0"
+			     : "=r" (temp)
+			     :
+			     : "memory");
+}
+
+
+/*
+ * disable IRQ/FIQ interrupts
+ * returns true if interrupts had been enabled before we disabled them
+ */
+int disable_interrupts (void)
+{
+	unsigned long old,temp;
+	__asm__ __volatile__("mrs %0, cpsr\n"
+			     "orr %1, %0, #0xc0\n"
+			     "msr cpsr_c, %1"
+			     : "=r" (old), "=r" (temp)
+			     :
+			     : "memory");
+	return (old & 0x80) == 0;
+}
+#else
+void enable_interrupts (void)
+{
+	return;
+}
+int disable_interrupts (void)
+{
+	return 0;
+}
+#endif
+
+
+void bad_mode (void)
+{
+	panic ("Resetting CPU ...\n");
+	reset_cpu (0);
+}
+
+void show_regs (struct pt_regs *regs)
+{
+	unsigned long flags;
+	const char *processor_modes[] = {
+	"USER_26",	"FIQ_26",	"IRQ_26",	"SVC_26",
+	"UK4_26",	"UK5_26",	"UK6_26",	"UK7_26",
+	"UK8_26",	"UK9_26",	"UK10_26",	"UK11_26",
+	"UK12_26",	"UK13_26",	"UK14_26",	"UK15_26",
+	"USER_32",	"FIQ_32",	"IRQ_32",	"SVC_32",
+	"UK4_32",	"UK5_32",	"UK6_32",	"ABT_32",
+	"UK8_32",	"UK9_32",	"UK10_32",	"UND_32",
+	"UK12_32",	"UK13_32",	"UK14_32",	"SYS_32",
+	};
+
+	flags = condition_codes (regs);
+
+	printf ("pc : [<%08lx>]    lr : [<%08lx>]\n"
+		"sp : %08lx  ip : %08lx  fp : %08lx\n",
+		instruction_pointer (regs),
+		regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
+	printf ("r10: %08lx  r9 : %08lx  r8 : %08lx\n",
+		regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
+	printf ("r7 : %08lx  r6 : %08lx  r5 : %08lx  r4 : %08lx\n",
+		regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
+	printf ("r3 : %08lx  r2 : %08lx  r1 : %08lx  r0 : %08lx\n",
+		regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
+	printf ("Flags: %c%c%c%c",
+		flags & CC_N_BIT ? 'N' : 'n',
+		flags & CC_Z_BIT ? 'Z' : 'z',
+		flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
+	printf ("  IRQs %s  FIQs %s  Mode %s%s\n",
+		interrupts_enabled (regs) ? "on" : "off",
+		fast_interrupts_enabled (regs) ? "on" : "off",
+		processor_modes[processor_mode (regs)],
+		thumb_mode (regs) ? " (T)" : "");
+}
+
+void do_undefined_instruction (struct pt_regs *pt_regs)
+{
+	printf ("undefined instruction\n");
+	show_regs (pt_regs);
+	bad_mode ();
+}
+
+void do_software_interrupt (struct pt_regs *pt_regs)
+{
+	printf ("software interrupt\n");
+	show_regs (pt_regs);
+	bad_mode ();
+}
+
+void do_prefetch_abort (struct pt_regs *pt_regs)
+{
+	printf ("prefetch abort\n");
+	show_regs (pt_regs);
+	bad_mode ();
+}
+
+void do_data_abort (struct pt_regs *pt_regs)
+{
+	printf ("data abort\n");
+	show_regs (pt_regs);
+	bad_mode ();
+}
+
+void do_not_used (struct pt_regs *pt_regs)
+{
+	printf ("not used\n");
+	show_regs (pt_regs);
+	bad_mode ();
+}
+
+void do_fiq (struct pt_regs *pt_regs)
+{
+	printf ("fast interrupt request\n");
+	show_regs (pt_regs);
+	bad_mode ();
+}
+
+void do_irq (struct pt_regs *pt_regs)
+{
+	printf ("interrupt request\n");
+	show_regs (pt_regs);
+	bad_mode ();
+}
+
+/* The timer functionality is supplied by the Integrator board */
+/* - see board/integrator<>.c */
diff --git a/cpu/arm_intcm/start.S b/cpu/arm_intcm/start.S
new file mode 100644
index 0000000..ccfd181
--- /dev/null
+++ b/cpu/arm_intcm/start.S
@@ -0,0 +1,370 @@
+/*
+ *  armboot - Startup Code for ARM926EJS CPU-core
+ *
+ *  Copyright (c) 2003  Texas Instruments
+ *
+ *  ----- Adapted for OMAP1610 OMAP730 from ARM925t code ------
+ *
+ *  Copyright (c) 2001	Marius Gröger <mag@sysgo.de>
+ *  Copyright (c) 2002	Alex Züpke <azu@sysgo.de>
+ *  Copyright (c) 2002	Gary Jennejohn <gj@denx.de>
+ *  Copyright (c) 2003	Richard Woodruff <r-woodruff2@ti.com>
+ *  Copyright (c) 2003	Kshitij <kshitij@ti.com>
+ *
+ * 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 <config.h>
+#include <version.h>
+
+/*
+ *************************************************************************
+ *
+ * Jump vector table
+ *
+ *************************************************************************
+ */
+
+.globl _start
+_start:
+	b	reset
+	ldr	pc, _undefined_instruction
+	ldr	pc, _software_interrupt
+	ldr	pc, _prefetch_abort
+	ldr	pc, _data_abort
+	ldr	pc, _not_used
+	ldr	pc, _irq
+	ldr	pc, _fiq
+
+_undefined_instruction:
+	.word undefined_instruction
+_software_interrupt:
+	.word software_interrupt
+_prefetch_abort:
+	.word prefetch_abort
+_data_abort:
+	.word data_abort
+_not_used:
+	.word not_used
+_irq:
+	.word irq
+_fiq:
+	.word fiq
+
+	.balignl 16,0xdeadbeef
+
+/*
+ *************************************************************************
+ *
+ * Startup Code (reset vector)
+ *
+ * do important init only if we don't start from memory!
+ * setup memory and board specific bits prior to relocation.
+ * relocate armboot to ram
+ * setup stack
+ *
+ *************************************************************************
+ */
+
+_TEXT_BASE:
+	.word	TEXT_BASE /* address of _start in the linked image */
+
+.globl _armboot_start
+_armboot_start:
+	.word _start
+
+/*
+ * These are defined in the board-specific linker script.
+ */
+.globl _bss_start
+_bss_start:
+	.word __bss_start
+
+.globl _bss_end
+_bss_end:
+	.word _end
+
+#ifdef CONFIG_USE_IRQ
+/* IRQ stack memory (calculated at run-time) */
+.globl IRQ_STACK_START
+IRQ_STACK_START:
+	.word	0x0badc0de
+
+/* IRQ stack memory (calculated at run-time) */
+.globl FIQ_STACK_START
+FIQ_STACK_START:
+	.word 0x0badc0de
+#endif
+
+
+/*
+ * the actual reset code
+ */
+.globl reset
+reset:
+	/*
+	 * set the cpu to SVC32 mode
+	 */
+	mrs	r0,cpsr
+	bic	r0,r0,#0x1f
+	orr	r0,r0,#0xd3
+	msr	cpsr,r0
+
+	/*
+	 * we do sys-critical inits only at reboot,
+	 * not when booting from ram!
+	 */
+#ifdef CONFIG_INIT_CRITICAL
+	bl	cpu_init_crit
+#endif
+
+relocate:				/* relocate U-Boot to RAM	    */
+	adr	r0, _start		/* pc relative  address of label    */
+	ldr	r1, _TEXT_BASE		/* linked image address of label    */
+	cmp	r0, r1                  /* test if we run from flash or RAM */
+	beq	stack_setup             /* ifeq we are in the RAM copy      */
+
+	ldr	r2, _armboot_start
+	ldr	r3, _bss_start
+	sub	r2, r3, r2		/* r2 <- size of armboot            */
+	add	r2, r0, r2		/* r2 <- source end address         */
+
+copy_loop:
+	ldmia	r0!, {r3-r10}		/* copy from source address [r0]    */
+	stmia	r1!, {r3-r10}		/* copy to   target address [r1]    */
+	cmp	r0, r2			/* until source end addreee [r2]    */
+	ble	copy_loop
+
+	/* Set up the stack						    */
+stack_setup:
+	ldr	r0, _TEXT_BASE		/* upper 128 KiB: relocated uboot   */
+	sub	r0, r0, #CFG_MALLOC_LEN	/* malloc area                      */
+	sub	r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo                        */
+#ifdef CONFIG_USE_IRQ
+	sub	r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
+#endif
+	sub	sp, r0, #12		/* leave 3 words for abort-stack    */
+
+clear_bss:
+	ldr	r0, _bss_start		/* find start of bss segment        */
+	ldr	r1, _bss_end		/* stop here                        */
+	mov 	r2, #0x00000000		/* clear                            */
+
+clbss_l:str	r2, [r0]		/* clear loop...                    */
+	add	r0, r0, #4
+	cmp	r0, r1
+	ble	clbss_l
+
+	ldr	pc, _start_armboot
+
+_start_armboot:
+	.word start_armboot
+
+/*
+ *************************************************************************
+ *
+ * CPU_init_critical registers
+ *
+ * setup important registers
+ * setup memory timing
+ *
+ *************************************************************************
+ */
+
+cpu_init_crit:
+	/*  arm_int_generic assumes the ARM boot monitor, or user software,
+	 * has initialized the platform
+	 */
+	mov	pc, lr		/* back to my caller */
+/*
+ *************************************************************************
+ *
+ * Interrupt handling
+ *
+ *************************************************************************
+ */
+
+@
+@ IRQ stack frame.
+@
+#define S_FRAME_SIZE	72
+
+#define S_OLD_R0	68
+#define S_PSR		64
+#define S_PC		60
+#define S_LR		56
+#define S_SP		52
+
+#define S_IP		48
+#define S_FP		44
+#define S_R10		40
+#define S_R9		36
+#define S_R8		32
+#define S_R7		28
+#define S_R6		24
+#define S_R5		20
+#define S_R4		16
+#define S_R3		12
+#define S_R2		8
+#define S_R1		4
+#define S_R0		0
+
+#define MODE_SVC 0x13
+#define I_BIT	 0x80
+
+/*
+ * use bad_save_user_regs for abort/prefetch/undef/swi ...
+ * use irq_save_user_regs / irq_restore_user_regs for IRQ/FIQ handling
+ */
+
+	.macro	bad_save_user_regs
+	@ carve out a frame on current user stack
+	sub	sp, sp, #S_FRAME_SIZE
+	stmia	sp, {r0 - r12}	@ Save user registers (now in svc mode) r0-r12
+
+	ldr	r2, _armboot_start
+	sub	r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+	sub	r2, r2, #(CFG_GBL_DATA_SIZE+8)  @ set base 2 words into abort stack
+	@ get values for "aborted" pc and cpsr (into parm regs)
+	ldmia	r2, {r2 - r3}
+	add	r0, sp, #S_FRAME_SIZE		@ grab pointer to old stack
+	add	r5, sp, #S_SP
+	mov	r1, lr
+	stmia	r5, {r0 - r3}	@ save sp_SVC, lr_SVC, pc, cpsr
+	mov	r0, sp		@ save current stack into r0 (param register)
+	.endm
+
+	.macro	irq_save_user_regs
+	sub	sp, sp, #S_FRAME_SIZE
+	stmia	sp, {r0 - r12}			@ Calling r0-r12
+	@ !!!! R8 NEEDS to be saved !!!! a reserved stack spot would be good.
+	add	r8, sp, #S_PC
+	stmdb	r8, {sp, lr}^		@ Calling SP, LR
+	str	lr, [r8, #0]		@ Save calling PC
+	mrs	r6, spsr
+	str	r6, [r8, #4]		@ Save CPSR
+	str	r0, [r8, #8]		@ Save OLD_R0
+	mov	r0, sp
+	.endm
+
+	.macro	irq_restore_user_regs
+	ldmia	sp, {r0 - lr}^			@ Calling r0 - lr
+	mov	r0, r0
+	ldr	lr, [sp, #S_PC]			@ Get PC
+	add	sp, sp, #S_FRAME_SIZE
+	subs	pc, lr, #4		@ return & move spsr_svc into cpsr
+	.endm
+
+	.macro get_bad_stack
+	ldr	r13, _armboot_start		@ setup our mode stack
+	sub	r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+	sub	r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
+
+	str	lr, [r13]	@ save caller lr in position 0 of saved stack
+	mrs	lr, spsr	@ get the spsr
+	str	lr, [r13, #4]	@ save spsr in position 1 of saved stack
+	mov	r13, #MODE_SVC	@ prepare SVC-Mode
+	@ msr	spsr_c, r13
+	msr	spsr, r13	@ switch modes, make sure moves will execute
+	mov	lr, pc		@ capture return pc
+	movs	pc, lr		@ jump to next instruction & switch modes.
+	.endm
+
+	.macro get_irq_stack			@ setup IRQ stack
+	ldr	sp, IRQ_STACK_START
+	.endm
+
+	.macro get_fiq_stack			@ setup FIQ stack
+	ldr	sp, FIQ_STACK_START
+	.endm
+
+/*
+ * exception handlers
+ */
+	.align  5
+.globl undefined_instruction
+undefined_instruction:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_undefined_instruction
+
+	.align	5
+.globl software_interrupt
+software_interrupt:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_software_interrupt
+
+	.align	5
+.globl prefetch_abort
+prefetch_abort:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_prefetch_abort
+
+	.align	5
+.globl data_abort
+data_abort:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_data_abort
+
+	.align	5
+.globl not_used
+not_used:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_not_used
+
+#ifdef CONFIG_USE_IRQ
+	.align	5
+.globl irq
+irq:
+	get_irq_stack
+	irq_save_user_regs
+	bl 	do_irq
+	irq_restore_user_regs
+
+	.align	5
+.globl fiq
+fiq:
+	get_fiq_stack
+	/* someone ought to write a more effiction fiq_save_user_regs */
+	irq_save_user_regs
+	bl 	do_fiq
+	irq_restore_user_regs
+
+#else
+
+	.align	5
+.globl irq	
+irq:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_irq
+
+	.align	5
+.globl fiq	
+fiq:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_fiq
+
+#endif