* Make sure HUSH is initialized for running auto-update scripts

* Make 5200 reset command _really_ reset the board, without running
  any other code after it

* Fix flash mapping and display on P3G4 board

* Patch by Kyle Harris, 15 Jul 2003:
  - add support for Intel IXP425 CPU
  - add support for IXDP425 eval board

7 files changed, 1120 insertions, 0 deletions

diff --git a/cpu/ixp/Makefile b/cpu/ixp/Makefile
new file mode 100644
index 0000000000..41ae689382
--- /dev/null
+++ b/cpu/ixp/Makefile
@@ -0,0 +1,43 @@
+#
+# (C) Copyright 2000, 2002
+# 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	= serial.o interrupts.o cpu.o timer.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/ixp/config.mk b/cpu/ixp/config.mk
new file mode 100644
index 0000000000..667adfc25d
--- /dev/null
+++ b/cpu/ixp/config.mk
@@ -0,0 +1,30 @@
+#
+# (C) Copyright 2002
+# Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+# Marius Groeger <mgroeger@sysgo.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
+#
+
+BIG_ENDIAN = y
+
+PLATFORM_RELFLAGS += -fno-strict-aliasing  -fno-common -ffixed-r8 \
+	-mshort-load-bytes -msoft-float -mbig-endian
+
+PLATFORM_CPPFLAGS += -mbig-endian -mapcs-32 -march=armv4 -mtune=strongarm1100
diff --git a/cpu/ixp/cpu.c b/cpu/ixp/cpu.c
new file mode 100644
index 0000000000..d12e8bd6c2
--- /dev/null
+++ b/cpu/ixp/cpu.c
@@ -0,0 +1,160 @@
+/*
+ * (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>
+ *
+ * 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 <asm/arch/ixp425.h>
+
+int cpu_init (void)
+{
+	/*
+	 * setup up stack if necessary
+	 */
+/*
+
+  FIXME: the stack is _below_ the uboot code!!
+
+#ifdef CONFIG_USE_IRQ
+	IRQ_STACK_START = _armboot_end +
+			CONFIG_STACKSIZE + CONFIG_STACKSIZE_IRQ - 4;
+	FIQ_STACK_START = IRQ_STACK_START + CONFIG_STACKSIZE_FIQ;
+	_armboot_real_end = FIQ_STACK_START + 4;
+#else
+	_armboot_real_end = _armboot_end + CONFIG_STACKSIZE;
+#endif
+*/
+   pci_init();
+	return 0;
+}
+
+int cleanup_before_linux (void)
+{
+	/*
+	 * this function is called just before we call linux
+	 * it prepares the processor for linux
+	 *
+	 * just disable everything that can disturb booting linux
+	 */
+
+	unsigned long i;
+
+	disable_interrupts ();
+
+	/* turn off I-cache */
+	asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
+	i &= ~0x1000;
+	asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
+
+	/* flush I-cache */
+	asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
+
+	return (0);
+}
+
+int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	extern void reset_cpu (ulong addr);
+
+	printf ("reseting ...\n");
+
+	udelay (50000);				/* wait 50 ms */
+	disable_interrupts ();
+	reset_cpu (0);
+
+	/*NOTREACHED*/
+	return (0);
+}
+
+/* taken from blob */
+void icache_enable (void)
+{
+	register u32 i;
+
+	/* read control register */
+	asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
+
+	/* set i-cache */
+	i |= 0x1000;
+
+	/* write back to control register */
+	asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
+}
+
+void icache_disable (void)
+{
+	register u32 i;
+
+	/* read control register */
+	asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
+
+	/* clear i-cache */
+	i &= ~0x1000;
+
+	/* write back to control register */
+	asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
+
+	/* flush i-cache */
+	asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i));
+}
+
+int icache_status (void)
+{
+	register u32 i;
+
+	/* read control register */
+	asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
+
+	/* return bit */
+	return (i & 0x1000);
+}
+
+/* we will never enable dcache, because we have to setup MMU first */
+void dcache_enable (void)
+{
+	return;
+}
+
+void dcache_disable (void)
+{
+	return;
+}
+
+int dcache_status (void)
+{
+	return 0;					/* always off */
+}
+
+/* FIXME */
+void pci_init(void)
+{
+	return;
+}
diff --git a/cpu/ixp/interrupts.c b/cpu/ixp/interrupts.c
new file mode 100644
index 0000000000..d73dd93656
--- /dev/null
+++ b/cpu/ixp/interrupts.c
@@ -0,0 +1,161 @@
+/* vi: set ts=8 sw=8 noet: */
+/*
+ * (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>
+ *
+ * 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/arch/ixp425.h>
+
+extern void reset_cpu (ulong addr);
+
+#ifdef CONFIG_USE_IRQ
+/* enable IRQ/FIQ interrupts */
+void enable_interrupts (void)
+{
+#error: interrupts not implemented yet
+}
+
+
+/*
+ * disable IRQ/FIQ interrupts
+ * returns true if interrupts had been enabled before we disabled them
+ */
+int disable_interrupts (void)
+{
+#error: interrupts not implemented yet
+}
+#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 ();
+}
+
+
+int interrupt_init (void)
+{
+	/* nothing happens here - we don't setup any IRQs */
+	return (0);
+}
diff --git a/cpu/ixp/serial.c b/cpu/ixp/serial.c
new file mode 100644
index 0000000000..aea0cf8696
--- /dev/null
+++ b/cpu/ixp/serial.c
@@ -0,0 +1,125 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
+ *
+ * (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>
+ *
+ * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
+ *
+ * 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/arch/ixp425.h>
+
+void serial_setbrg (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	unsigned int quot = 0;
+	int uart = CFG_IXP425_CONSOLE;
+
+	if (gd->baudrate == 1200)
+		quot = 192;
+	else if (gd->baudrate == 9600)
+		quot = 96;
+	else if (gd->baudrate == 19200)
+		quot = 48;
+	else if (gd->baudrate == 38400)
+		quot = 24;
+	else if (gd->baudrate == 57600)
+		quot = 16;
+	else if (gd->baudrate == 115200)
+		quot = 8;
+	else
+		hang ();
+
+	IER(uart) = 0;					/* Disable for now */
+	FCR(uart) = 0;					/* No fifos enabled */
+
+	/* set baud rate */
+	LCR(uart) = LCR_WLS0 | LCR_WLS1 | LCR_DLAB;
+	DLL(uart) = quot & 0xff;
+	DLH(uart) = quot >> 8;
+	LCR(uart) = LCR_WLS0 | LCR_WLS1;
+
+	IER(uart) = IER_UUE;
+}
+
+
+/*
+ * Initialise the serial port with the given baudrate. The settings
+ * are always 8 data bits, no parity, 1 stop bit, no start bits.
+ *
+ */
+int serial_init (void)
+{
+	serial_setbrg ();
+
+	return (0);
+}
+
+
+/*
+ * Output a single byte to the serial port.
+ */
+void serial_putc (const char c)
+{
+	/* wait for room in the tx FIFO on UART */
+	while ((LSR(CFG_IXP425_CONSOLE) & LSR_TEMT) == 0);
+
+	THR(CFG_IXP425_CONSOLE) = c;
+
+	/* If \n, also do \r */
+	if (c == '\n')
+		serial_putc ('\r');
+}
+
+/*
+ * Read a single byte from the serial port. Returns 1 on success, 0
+ * otherwise. When the function is succesfull, the character read is
+ * written into its argument c.
+ */
+int serial_tstc (void)
+{
+	return LSR(CFG_IXP425_CONSOLE) & LSR_DR;
+}
+
+/*
+ * Read a single byte from the serial port. Returns 1 on success, 0
+ * otherwise. When the function is succesfull, the character read is
+ * written into its argument c.
+ */
+int serial_getc (void)
+{
+	while (!(LSR(CFG_IXP425_CONSOLE) & LSR_DR));
+
+	return (char) RBR(CFG_IXP425_CONSOLE) & 0xff;
+}
+
+void
+serial_puts (const char *s)
+{
+	while (*s) {
+		serial_putc (*s++);
+	}
+}
diff --git a/cpu/ixp/start.S b/cpu/ixp/start.S
new file mode 100644
index 0000000000..de33e8b8fe
--- /dev/null
+++ b/cpu/ixp/start.S
@@ -0,0 +1,527 @@
+/* vi: set ts=8 sw=8 noet: */
+/*
+ *  u-boot - Startup Code for XScale IXP
+ *
+ * Copyright (C) 2003	Kyle Harris <kharris@nexus-tech.net>
+ *
+ * Based on startup code example contained in the
+ * Intel IXP4xx Programmer's Guide and past u-boot Start.S
+ * samples.
+ *
+ * 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>
+#include <asm/arch/ixp425.h>
+
+#define MMU_Control_M  0x001    // Enable MMU
+#define MMU_Control_A  0x002    // Enable address alignment faults
+#define MMU_Control_C  0x004    // Enable cache
+#define MMU_Control_W  0x008    // Enable write-buffer
+#define MMU_Control_P  0x010    // Compatability: 32 bit code
+#define MMU_Control_D  0x020    // Compatability: 32 bit data
+#define MMU_Control_L  0x040    // Compatability:
+#define MMU_Control_B  0x080    // Enable Big-Endian
+#define MMU_Control_S  0x100    // Enable system protection
+#define MMU_Control_R  0x200    // Enable ROM protection
+#define MMU_Control_I  0x1000   // Enable Instruction cache
+#define MMU_Control_X  0x2000   // Set interrupt vectors at 0xFFFF0000
+#define MMU_Control_Init (MMU_Control_P|MMU_Control_D|MMU_Control_L)
+
+
+/*
+ * Macro definitions
+ */
+	// Delay a bit
+        .macro DELAY_FOR cycles, reg0
+        ldr     \reg0, =\cycles
+        subs    \reg0, \reg0, #1
+        subne   pc,  pc, #0xc
+        .endm
+
+        // wait for coprocessor write complete
+        .macro CPWAIT reg
+        mrc  p15,0,\reg,c2,c0,0
+        mov  \reg,\reg
+        sub  pc,pc,#4
+        .endm
+
+.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!
+ * - relocate armboot to ram
+ * - setup stack
+ * - jump to second stage
+ */
+
+_TEXT_BASE:
+	.word	TEXT_BASE
+
+.globl _armboot_start
+_armboot_start:
+	.word _start
+
+/*
+ * Note: _armboot_end_data and _armboot_end are defined
+ * by the (board-dependent) linker script.
+ * _armboot_end_data is the first usable FLASH address after armboot
+ */
+.globl _armboot_end_data
+_armboot_end_data:
+	.word armboot_end_data
+.globl _armboot_end
+_armboot_end:
+	.word armboot_end
+
+/*
+ * This is defined in the board specific linker script
+ */
+.globl _bss_start
+_bss_start:
+	.word bss_start
+
+.globl _bss_end
+_bss_end:
+	.word bss_end
+
+/*
+ * _armboot_real_end is the first usable RAM address behind armboot
+ * and the various stacks
+ */
+.globl _armboot_real_end
+_armboot_real_end:
+	.word 0x0badc0de
+
+/*
+ * We relocate uboot to this address (end of RAM - 128 KiB)
+ */
+.globl _uboot_reloc
+_uboot_reloc:
+	.word TEXT_BASE
+
+#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:
+	/* disable mmu, set big-endian */
+	mov	r0, #0xf8
+	mcr	p15, 0, r0, c1, c0, 0
+        CPWAIT  r0
+
+	/* invalidate I & D caches & BTB */
+	mcr	p15, 0, r0, c7, c7, 0
+	CPWAIT	r0
+
+	/* invalidate I & Data TLB */
+        mcr 	p15, 0, r0, c8, c7, 0
+        CPWAIT r0
+
+	/* drain write and fill buffers */
+	mcr	p15, 0, r0, c7, c10, 4
+	CPWAIT	r0
+
+	/* disable write buffer coalescing */
+	mrc	p15, 0, r0, c1, c0, 1
+	orr	r0, r0, #1
+	mcr	p15, 0, r0, c1, c0, 1
+	CPWAIT	r0
+
+	/* set EXP CS0 to the optimum timing */
+	ldr	r1, =CFG_EXP_CS0
+	ldr     r2, =IXP425_EXP_CS0
+	str     r1, [r2]
+
+        /* make sure flash is visible at 0 */
+	ldr 	r2, =IXP425_EXP_CFG0
+	ldr     r1, [r2]
+	orr     r1, r1, #0x80000000
+	str     r1, [r2]
+
+	mov 	r1, #CFG_SDR_CONFIG
+	ldr     r2, =IXP425_SDR_CONFIG
+	str     r1, [r2]
+
+	/* disable refresh cycles */
+	mov 	r1, #0
+	ldr     r3, =IXP425_SDR_REFRESH
+	str	r1, [r3]
+
+	/* send nop command */
+	mov 	r1, #3
+	ldr	r4, =IXP425_SDR_IR
+	str	r1, [r4]
+        DELAY_FOR 0x4000, r0
+
+	/* set SDRAM internal refresh val */
+	ldr	r1, =CFG_SDRAM_REFRESH_CNT
+	str     r1, [r3]
+	DELAY_FOR 0x4000, r0
+
+	/* send precharge-all command to close all open banks */
+	mov     r1, #2
+	str     r1, [r4]
+	DELAY_FOR 0x4000, r0
+
+	/* provide 8 auto-refresh cycles */
+	mov     r1, #4
+	mov     r5, #8
+111:    str	r1, [r4]
+	DELAY_FOR 0x100, r0
+	subs	r5, r5, #1
+	bne	111b
+
+	/* set mode register in sdram */
+	mov	r1, #1
+	str	r1, [r4]
+	DELAY_FOR 0x4000, r0
+
+	/* send normal operation command */
+	mov	r1, #6
+	str	r1, [r4]
+	DELAY_FOR 0x4000, r0
+
+	/* copy */
+        mov     r0, #0
+        mov     r4, r0
+        add     r2, r0, #0x40000
+	mov     r1, #0x10000000
+        mov     r5, r1
+
+    30:
+        ldr     r3, [r0], #4
+        str     r3, [r1], #4
+        cmp     r0, r2
+        bne     30b
+
+	/* invalidate I & D caches & BTB */
+	mcr	p15, 0, r0, c7, c7, 0
+	CPWAIT	r0
+
+	/* invalidate I & Data TLB */
+        mcr 	p15, 0, r0, c8, c7, 0
+        CPWAIT r0
+
+	/* drain write and fill buffers */
+	mcr	p15, 0, r0, c7, c10, 4
+	CPWAIT	r0
+
+ 	/* move flash to 0x50000000 */
+	ldr 	r2, =IXP425_EXP_CFG0
+	ldr     r1, [r2]
+	bic     r1, r1, #0x80000000
+	str     r1, [r2]
+
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+
+	/* invalidate I & Data TLB */
+        mcr 	p15, 0, r0, c8, c7, 0
+        CPWAIT r0
+
+        /* enable I cache */
+        mrc     p15, 0, r0, c1, c0, 0
+        orr     r0, r0, #MMU_Control_I
+        mcr     p15, 0, r0, c1, c0, 0
+        CPWAIT  r0
+
+	mrs	r0,cpsr			/* set the cpu to SVC32 mode	    */
+	bic	r0,r0,#0x1f		/* (superviser mode, M=10011)	    */
+	orr	r0,r0,#0x13
+	msr	cpsr,r0
+
+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, _armboot_end
+	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, _uboot_reloc	/* upper 128 KiB: relocated uboot   */
+	sub	r0, r0, #CFG_MALLOC_LEN /* malloc area			    */
+					/* FIXME: bdinfo should be here	    */
+	sub	sp, r0, #12		/* leave 3 words for abort-stack    */
+
+clear_bss:
+
+	ldr	r0, _bss_start		/* find start of bss segment        */
+	add	r0, r0, #4		/* start at first byte of bss       */
+	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
+
+
+
+
+/****************************************************************************/
+/*									    */
+/* 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
+
+	/* use bad_save_user_regs for abort/prefetch/undef/swi ...	    */
+
+	.macro	bad_save_user_regs
+	sub	sp, sp, #S_FRAME_SIZE
+	stmia	sp, {r0 - r12}			/* Calling r0-r12	    */
+	add	r8, sp, #S_PC
+
+	ldr	r2, _armboot_end
+	add	r2, r2, #CONFIG_STACKSIZE
+	sub	r2, r2, #8
+	ldmia	r2, {r2 - r4}			/* get pc, cpsr, old_r0	    */
+	add	r0, sp, #S_FRAME_SIZE		/* restore sp_SVC	    */
+
+	add	r5, sp, #S_SP
+	mov	r1, lr
+	stmia	r5, {r0 - r4}			/* save sp_SVC, lr_SVC, pc, cpsr, old_r */
+	mov	r0, sp
+	.endm
+
+
+	/* use irq_save_user_regs / irq_restore_user_regs for		     */
+	/* IRQ/FIQ handling						     */
+
+	.macro	irq_save_user_regs
+	sub	sp, sp, #S_FRAME_SIZE
+	stmia	sp, {r0 - r12}			/* Calling r0-r12	     */
+	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_end		@ setup our mode stack
+	add	r13, r13, #CONFIG_STACKSIZE	@ resides at top of normal stack
+	sub	r13, r13, #8
+
+	str	lr, [r13]			@ save caller lr / spsr
+	mrs	lr, spsr
+	str	lr, [r13, #4]
+
+	mov	r13, #MODE_SVC			@ prepare SVC-Mode
+	msr	spsr_c, r13
+	mov	lr, pc
+	movs	pc, lr
+	.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
+	irq_save_user_regs		/* someone ought to write a more    */
+	bl	do_fiq			/* effiction fiq_save_user_regs	    */
+	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
+
+/****************************************************************************/
+/*                                                                          */
+/* Reset function: Use Watchdog to reset                                    */
+/*                                                                          */
+/****************************************************************************/
+
+	.align	5
+.globl reset_cpu
+
+reset_cpu:
+	ldr 	r1, =0x482e
+	ldr     r2, =IXP425_OSWK
+	str     r1, [r2]
+	ldr 	r1, =0x0fff
+	ldr     r2, =IXP425_OSWT
+	str     r1, [r2]
+	ldr 	r1, =0x5
+	ldr     r2, =IXP425_OSWE
+	str     r1, [r2]
+	b	reset_endless
+
+
+reset_endless:
+
+	b	reset_endless
diff --git a/cpu/ixp/timer.c b/cpu/ixp/timer.c
new file mode 100644
index 0000000000..baa7e72b7e
--- /dev/null
+++ b/cpu/ixp/timer.c
@@ -0,0 +1,74 @@
+/* vi: set ts=8 sw=8 noet: */
+/*
+ * (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>
+ *
+ * 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/arch/ixp425.h>
+
+void ixp425_udelay(unsigned long usec)
+{
+	/*
+	 * This function has a max usec, but since it is called from udelay
+	 * we should not have to worry... be happy
+	 */
+	unsigned long usecs = CFG_HZ/1000000L & ~IXP425_OST_RELOAD_MASK;
+
+	*IXP425_OSST = IXP425_OSST_TIMER_1_PEND;
+	usecs |= IXP425_OST_ONE_SHOT | IXP425_OST_ENABLE;
+	*IXP425_OSRT1 = usecs;
+	while (!(*IXP425_OSST & IXP425_OSST_TIMER_1_PEND));
+}
+
+void udelay (unsigned long usec)
+{
+	while (usec--) ixp425_udelay(1);
+}
+
+static ulong reload_constant = 0xfffffff0;
+
+void reset_timer_masked (void)
+{
+	ulong reload = reload_constant | IXP425_OST_ONE_SHOT | IXP425_OST_ENABLE;
+
+	*IXP425_OSST = IXP425_OSST_TIMER_1_PEND;
+	*IXP425_OSRT1 = reload;
+}
+
+ulong get_timer_masked (void)
+{
+	/*
+	 * Note that it is possible for this to wrap!
+	 * In this case we return max.
+	 */
+	ulong current = *IXP425_OST1;
+	if (*IXP425_OSST & IXP425_OSST_TIMER_1_PEND)
+	{
+		return reload_constant;
+	}
+	return (reload_constant - current);
+}