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

Patch by Peter Pearse, 2 Feb 2005

15 files changed, 1701 insertions, 26 deletions

diff --git a/cpu/arm920t/cpu.c b/cpu/arm920t/cpu.c
index 718f253..2f7963d 100644
--- a/cpu/arm920t/cpu.c
+++ b/cpu/arm920t/cpu.c
@@ -39,7 +39,7 @@ static unsigned long read_p15_c1 (void)
 	unsigned long value;
 
 	__asm__ __volatile__(
-		"mrc     p15, 0, %0, c1, c0, 0   @ read control reg\n"
+		"mrc	p15, 0, %0, c1, c0, 0   @ read control reg\n"
 		: "=r" (value)
 		:
 		: "memory");
@@ -57,7 +57,7 @@ static void write_p15_c1 (unsigned long value)
 	printf ("write %08lx to p15/c1\n", value);
 #endif
 	__asm__ __volatile__(
-		"mcr     p15, 0, %0, c1, c0, 0   @ write it back\n"
+		"mcr	p15, 0, %0, c1, c0, 0   @ write it back\n"
 		:
 		: "r" (value)
 		: "memory");
@@ -73,16 +73,17 @@ static void cp_delay (void)
 	for (i = 0; i < 100; i++);
 }
 
-/* See also ARM Ref. Man. */
+/* See also ARM920T    Technical reference Manual */
 #define C1_MMU		(1<<0)		/* mmu off/on */
 #define C1_ALIGN	(1<<1)		/* alignment faults off/on */
 #define C1_DC		(1<<2)		/* dcache off/on */
-#define C1_BIG_ENDIAN	(1<<7)	/* big endian off/on */
+
+#define C1_BIG_ENDIAN	(1<<7)		/* big endian off/on */
 #define C1_SYS_PROT	(1<<8)		/* system protection */
 #define C1_ROM_PROT	(1<<9)		/* ROM protection */
 #define C1_IC		(1<<12)		/* icache off/on */
-#define C1_HIGH_VECTORS	(1<<13)	/* location of vectors: low/high addresses */
-#define RESERVED_1	(0xf << 3)	/* must be 111b for R/W */
+#define C1_HIGH_VECTORS	(1<<13)		/* location of vectors: low/high addresses */
+
 
 int cpu_init (void)
 {
@@ -119,6 +120,7 @@ int cleanup_before_linux (void)
 	/* flush I/D-cache */
 	i = 0;
 	asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
+
 	return (0);
 }
 
@@ -134,7 +136,7 @@ void icache_enable (void)
 {
 	ulong reg;
 
-	reg = read_p15_c1 ();
+	reg = read_p15_c1 ();		/* get control reg. */
 	cp_delay ();
 	write_p15_c1 (reg | C1_IC);
 }
diff --git a/cpu/arm920t/interrupts.c b/cpu/arm920t/interrupts.c
index bfab519..1d254c7 100644
--- a/cpu/arm920t/interrupts.c
+++ b/cpu/arm920t/interrupts.c
@@ -30,7 +30,6 @@
  */
 
 #include <common.h>
-
 #include <arm920t.h>
 #include <asm/proc-armv/ptrace.h>
 
@@ -162,7 +161,14 @@ void do_fiq (struct pt_regs *pt_regs)
 
 void do_irq (struct pt_regs *pt_regs)
 {
+#if defined (CONFIG_USE_IRQ) && defined (CONFIG_ARCH_INTEGRATOR)
+	/* ASSUMED to be a timer interrupt  */
+	/* Just clear it - count handled in */
+	/* integratorap.c                   */
+	*(volatile ulong *)(CFG_TIMERBASE + 0x0C) = 0;	
+#else
 	printf ("interrupt request\n");
 	show_regs (pt_regs);
 	bad_mode ();
+#endif
 }
diff --git a/cpu/arm926ejs/cpu.c b/cpu/arm926ejs/cpu.c
index 2681f99..f57c5a5 100644
--- a/cpu/arm926ejs/cpu.c
+++ b/cpu/arm926ejs/cpu.c
@@ -69,21 +69,21 @@ static void cp_delay (void)
 {
 	volatile int i;
 
-	/* Many OMAP regs need at least 2 nops  */
+	/* copro seems to need some delay between reading and writing */
 	for (i = 0; i < 100; i++);
 }
 
-/* See also ARM Ref. Man. */
+/* See also ARM926EJ-S Technical Reference Manual */
 #define C1_MMU		(1<<0)		/* mmu off/on */
 #define C1_ALIGN	(1<<1)		/* alignment faults off/on */
 #define C1_DC		(1<<2)		/* dcache off/on */
-#define C1_WB		(1<<3)		/* merging write buffer on/off */
-#define C1_BIG_ENDIAN	(1<<7)	/* big endian off/on */
+
+#define C1_BIG_ENDIAN	(1<<7)		/* big endian off/on */
 #define C1_SYS_PROT	(1<<8)		/* system protection */
 #define C1_ROM_PROT	(1<<9)		/* ROM protection */
 #define C1_IC		(1<<12)		/* icache off/on */
-#define C1_HIGH_VECTORS	(1<<13)	/* location of vectors: low/high addresses */
-#define RESERVED_1	(0xf << 3)	/* must be 111b for R/W */
+#define C1_HIGH_VECTORS	(1<<13)		/* location of vectors: low/high addresses */
+
 
 int cpu_init (void)
 {
@@ -120,6 +120,7 @@ int cleanup_before_linux (void)
 	/* flush I/D-cache */
 	i = 0;
 	asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i));
+
 	return (0);
 }
 
diff --git a/cpu/arm926ejs/interrupts.c b/cpu/arm926ejs/interrupts.c
index ae8082d..0457bff 100644
--- a/cpu/arm926ejs/interrupts.c
+++ b/cpu/arm926ejs/interrupts.c
@@ -36,8 +36,7 @@
  */
 
 #include <common.h>
-#include <arm925t.h>
-
+#include <arm926ejs.h>
 #include <asm/proc-armv/ptrace.h>
 
 #define TIMER_LOAD_VAL 0xffffffff
@@ -46,9 +45,6 @@
 #ifdef CONFIG_OMAP
 #define READ_TIMER (*(volatile ulong *)(CFG_TIMERBASE+8))
 #endif
-#ifdef CONFIG_INTEGRATOR
-#define READ_TIMER (*(volatile ulong *)(CFG_TIMERBASE+4))
-#endif
 #ifdef CONFIG_VERSATILE
 #define READ_TIMER (*(volatile ulong *)(CFG_TIMERBASE+4))
 #endif
@@ -186,6 +182,12 @@ void do_irq (struct pt_regs *pt_regs)
 	bad_mode ();
 }
 
+#ifdef CONFIG_INTEGRATOR
+
+	/* Timer functionality supplied by Integrator board (AP or CP) */
+
+#else
+
 static ulong timestamp;
 static ulong lastdec;
 
@@ -200,12 +202,7 @@ int interrupt_init (void)
 	val = MPUTIM_ST | MPUTIM_AR | MPUTIM_CLOCK_ENABLE | (CFG_PVT << MPUTIM_PTV_BIT);
 	*((int32_t *) (CFG_TIMERBASE + CNTL_TIMER)) = val;
 #endif	/* CONFIG_OMAP */
-#ifdef CONFIG_INTEGRATOR
-	/* Load timer with initial value */
-	*(volatile ulong *)(CFG_TIMERBASE + 0) = TIMER_LOAD_VAL;
-	/* Set timer to be enabled, free-running, no interrupts, 256 divider */
-	*(volatile ulong *)(CFG_TIMERBASE + 8) = 0x8C;
-#endif	/* CONFIG_INTEGRATOR */
+
 #ifdef CONFIG_VERSATILE
 	*(volatile ulong *)(CFG_TIMERBASE + 0) = CFG_TIMER_RELOAD;	/* TimerLoad */
 	*(volatile ulong *)(CFG_TIMERBASE + 4) = CFG_TIMER_RELOAD;	/* TimerValue */
@@ -332,3 +329,5 @@ ulong get_tbclk (void)
 	tbclk = CFG_HZ;
 	return tbclk;
 }
+
+#endif /* CONFIG_INTEGRATOR */
diff --git a/cpu/arm926ejs/start.S b/cpu/arm926ejs/start.S
index d62940b..dfa6e7f 100644
--- a/cpu/arm926ejs/start.S
+++ b/cpu/arm926ejs/start.S
@@ -393,6 +393,12 @@ fiq:
 
 #endif
 
+# ifdef CONFIG_INTEGRATOR
+
+	/* Satisfied by Integrator routine (AP or CP) */ 
+
+#else
+
 	.align	5
 .globl reset_cpu
 reset_cpu:
@@ -404,6 +410,8 @@ reset_cpu:
 _loop_forever:
 	b	_loop_forever
 
-
 rstctl1:
 	.word	0xfffece10
+
+#endif /* #ifdef CONFIG_INTEGRATOR */
+
diff --git a/cpu/arm946es/Makefile b/cpu/arm946es/Makefile
new file mode 100644
index 0000000..9a0e217
--- /dev/null
+++ b/cpu/arm946es/Makefile
@@ -0,0 +1,44 @@
+#
+# (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/arm946es/config.mk b/cpu/arm946es/config.mk
new file mode 100644
index 0000000..81ca288
--- /dev/null
+++ b/cpu/arm946es/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/arm946es/cpu.c b/cpu/arm946es/cpu.c
new file mode 100644
index 0000000..ea75fe2
--- /dev/null
+++ b/cpu/arm946es/cpu.c
@@ -0,0 +1,164 @@
+/*
+ * (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
+ */
+
+#include <common.h>
+#include <command.h>
+#include <arm946es.h>
+
+/* read co-processor 15, register #1 (control register) */
+static unsigned long read_p15_c1 (void)
+{
+	unsigned long value;
+
+	__asm__ __volatile__(
+		"mrc	p15, 0, %0, c1, c0, 0   @ read control reg\n"
+		: "=r" (value)
+		:
+		: "memory");
+
+#ifdef MMU_DEBUG
+	printf ("p15/c1 is = %08lx\n", value);
+#endif
+	return value;
+}
+
+/* write to co-processor 15, register #1 (control register) */
+static void write_p15_c1 (unsigned long value)
+{
+#ifdef MMU_DEBUG
+	printf ("write %08lx to p15/c1\n", value);
+#endif
+	__asm__ __volatile__(
+		"mcr	p15, 0, %0, c1, c0, 0   @ write it back\n"
+		:
+		: "r" (value)
+		: "memory");
+
+	read_p15_c1 ();
+}
+
+static void cp_delay (void)
+{
+	volatile int i;
+
+	/* copro seems to need some delay between reading and writing */
+	for (i = 0; i < 100; i++);
+}
+
+/* See also ARM946E-S  Technical Reference Manual */
+#define C1_MMU		(1<<0)		/* mmu off/on */
+#define C1_ALIGN	(1<<1)		/* alignment faults off/on */
+#define C1_DC		(1<<2)		/* dcache off/on */
+
+#define C1_BIG_ENDIAN	(1<<7)		/* big endian off/on */
+#define C1_SYS_PROT	(1<<8)		/* system protection */
+#define C1_ROM_PROT	(1<<9)		/* ROM protection */
+#define C1_IC		(1<<12)		/* icache off/on */
+#define C1_HIGH_VECTORS	(1<<13)		/* location of vectors: low/high addresses */
+
+
+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 ...
+	 */
+
+	unsigned long i;
+
+	disable_interrupts ();
+
+	/* ARM926E-S needs the protection unit enabled for the icache to have 
+         * been enabled  - left for possible later use
+	 * should turn off the protection unit as well....
+         */
+	/* turn off I/D-cache */
+	asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
+	i &= ~(C1_DC | C1_IC);
+	asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
+
+	/* flush I/D-cache */
+	i = 0;
+	asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
+	asm ("mcr p15, 0, %0, c7, c6, 0": :"r" (i));
+	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);
+}
+/* ARM926E-S needs the protection unit enabled for this to have any effect
+   - left for possible later use */
+void icache_enable (void)
+{
+	ulong reg;
+
+	reg = read_p15_c1 ();		/* get control reg. */
+	cp_delay ();
+	write_p15_c1 (reg | C1_IC);
+}
+
+void icache_disable (void)
+{
+	ulong reg;
+
+	reg = read_p15_c1 ();
+	cp_delay ();
+	write_p15_c1 (reg & ~C1_IC);
+}
+
+int icache_status (void)
+{
+	return (read_p15_c1 () & C1_IC) != 0;
+}
+
diff --git a/cpu/arm946es/interrupts.c b/cpu/arm946es/interrupts.c
new file mode 100644
index 0000000..5728c3a
--- /dev/null
+++ b/cpu/arm946es/interrupts.c
@@ -0,0 +1,292 @@
+/*
+ * (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 <arm946es.h>
+#include <asm/proc-armv/ptrace.h>
+
+#define TIMER_LOAD_VAL 0xffffffff
+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 ();
+}
+
+#ifdef CONFIG_INTEGRATOR
+	/* Timer functionality supplied by Integrator board (AP or CP) */
+#else
+
+static ulong timestamp;
+static ulong lastdec;
+
+/* nothing really to do with interrupts, just starts up a counter. */
+int interrupt_init (void)
+{
+	/* init the timestamp and lastdec value */
+	reset_timer_masked();
+
+	return (0);
+}
+
+/*
+ * timer without interrupts
+ */
+
+void reset_timer (void)
+{
+	reset_timer_masked ();
+}
+
+ulong get_timer (ulong base)
+{
+	return get_timer_masked () - base;
+}
+
+void set_timer (ulong t)
+{
+	timestamp = t;
+}
+
+/* delay x useconds AND perserve advance timstamp value */
+void udelay(unsigned long usec)
+{
+	udelay_masked(usec);
+}
+
+void reset_timer_masked (void)
+{
+	/* reset time */
+	lastdec = READ_TIMER;  /* capure current decrementer value time */
+	timestamp = 0;         /* start "advancing" time stamp from 0 */
+}
+
+ulong get_timer_raw (void)
+{
+	ulong now = READ_TIMER;		/* current tick value */
+
+	if (lastdec >= now) {		/* normal mode (non roll) */
+		/* normal mode */
+		timestamp += lastdec - now; /* move stamp fordward with absoulte diff ticks */
+	} else {			/* we have overflow of the count down timer */
+		/* nts = ts + ld + (TLV - now)
+		 * ts=old stamp, ld=time that passed before passing through -1
+		 * (TLV-now) amount of time after passing though -1
+		 * nts = new "advancing time stamp"...it could also roll and cause problems.
+		 */
+		timestamp += lastdec + TIMER_LOAD_VAL - now;
+	}
+	lastdec = now;
+
+	return timestamp;
+}
+
+ulong get_timer_masked (void)
+{
+	return get_timer_raw() / TIMER_LOAD_VAL;
+}
+
+/* waits specified delay value and resets timestamp */
+void udelay_masked (unsigned long usec)
+{
+	ulong tmo;
+
+	if(usec >= 1000){               /* if "big" number, spread normalization to seconds */
+		tmo = usec / 1000;      /* start to normalize for usec to ticks per sec */
+		tmo *= CFG_HZ_CLOCK;    /* find number of "ticks" to wait to achieve target */
+		tmo /= 1000;            /* finish normalize. */
+	}else{                          /* else small number, don't kill it prior to HZ multiply */
+		tmo = usec * CFG_HZ_CLOCK;
+		tmo /= (1000*1000);
+	}
+
+	reset_timer_masked ();	/* set "advancing" timestamp to 0, set lastdec vaule */
+
+	while (get_timer_raw () < tmo) /* wait for time stamp to overtake tick number.*/
+		/*NOP*/;
+}
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On ARM it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+	return get_timer(0);
+}
+
+/*
+ * This function is derived from PowerPC code (timebase clock frequency).
+ * On ARM it returns the number of timer ticks per second.
+ */
+ulong get_tbclk (void)
+{
+	ulong tbclk;
+
+	tbclk = CFG_HZ;
+	return tbclk;
+}
+
+#endif /* CONFIG_INTEGRATOR */
diff --git a/cpu/arm946es/start.S b/cpu/arm946es/start.S
new file mode 100644
index 0000000..ef3be8e
--- /dev/null
+++ b/cpu/arm946es/start.S
@@ -0,0 +1,409 @@
+/*
+ *  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 as in table 3.1 in [1]
+ *
+ *************************************************************************
+ */
+
+
+.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
+
+.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
+ */
+
+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		/* r0 <- current position of code   */
+	ldr	r1, _TEXT_BASE		/* test if we run from flash or RAM */
+	cmp     r0, r1                  /* don't reloc during debug         */
+	beq     stack_setup
+
+	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
+	bne	clbss_l
+
+	ldr	pc, _start_armboot
+
+_start_armboot:
+	.word start_armboot
+
+
+/*
+ *************************************************************************
+ *
+ * CPU_init_critical registers
+ *
+ * setup important registers
+ * setup memory timing
+ *
+ *************************************************************************
+ */
+
+
+cpu_init_crit:
+	/*
+	 * flush v4 I/D caches
+	 */
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c5, 0	/* flush v4 I-cache */
+	mcr	p15, 0, r0, c7, c6, 0	/* flush v4 D-cache */
+
+	/*
+	 * disable MMU stuff and caches
+	 */
+	mrc	p15, 0, r0, c1, c0, 0
+	bic	r0, r0, #0x00002300	/* clear bits 13, 9:8 (--V- --RS) */
+	bic	r0, r0, #0x00000087	/* clear bits 7, 2:0 (B--- -CAM) */
+	orr	r0, r0, #0x00000002	/* set bit 2 (A) Align */
+	orr	r0, r0, #0x00001000	/* set bit 12 (I) I-Cache */
+	mcr	p15, 0, r0, c1, c0, 0
+
+	/*
+	 * Go setup Memory and board specific bits prior to relocation.
+	 */
+	mov	ip, lr		/* perserve link reg across call */
+	bl	platformsetup	/* go setup memory */
+	mov	lr, ip		/* restore link */
+	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
+undefined_instruction:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_undefined_instruction
+
+	.align	5
+software_interrupt:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_software_interrupt
+
+	.align	5
+prefetch_abort:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_prefetch_abort
+
+	.align	5
+data_abort:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_data_abort
+
+	.align	5
+not_used:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_not_used
+
+#ifdef CONFIG_USE_IRQ
+
+	.align	5
+irq:
+	get_irq_stack
+	irq_save_user_regs
+	bl 	do_irq
+	irq_restore_user_regs
+
+	.align	5
+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
+irq:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_irq
+
+	.align	5
+fiq:
+	get_bad_stack
+	bad_save_user_regs
+	bl	do_fiq
+
+#endif
+
+# ifdef CONFIG_INTEGRATOR
+
+	/* Satisfied by general board level routine */
+
+#else
+
+	.align	5
+.globl reset_cpu
+reset_cpu:
+
+	ldr	r1, rstctl1	/* get clkm1 reset ctl */
+	mov	r3, #0x0
+	strh	r3, [r1]	/* clear it */
+	mov	r3, #0x8
+	strh	r3, [r1]	/* force dsp+arm reset */
+_loop_forever:
+	b	_loop_forever
+
+rstctl1:
+	.word	0xfffece10
+
+#endif	/* #ifdef CONFIG_INTEGRATOR */
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