Move arch/ppc to arch/powerpc

As discussed on the list, move "arch/ppc" to "arch/powerpc" to
better match the Linux directory structure.

Please note that this patch also changes the "ppc" target in
MAKEALL to "powerpc" to match this new infrastructure. But "ppc"
is kept as an alias for now, to not break compatibility with
scripts using this name.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Anatolij Gustschin <agust@denx.de>

11 files changed, 2485 insertions, 0 deletions

diff --git a/arch/powerpc/cpu/74xx_7xx/Makefile b/arch/powerpc/cpu/74xx_7xx/Makefile
new file mode 100644
index 0000000..fe905f3
--- /dev/null
+++ b/arch/powerpc/cpu/74xx_7xx/Makefile
@@ -0,0 +1,51 @@
+#
+# (C) Copyright 2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2001
+# Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
+#
+# 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	= $(obj)lib$(CPU).a
+
+START	= start.o
+SOBJS	= cache.o kgdb.o io.o
+COBJS	= traps.o cpu.o cpu_init.o speed.o interrupts.o
+
+SRCS	:= $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+START	:= $(addprefix $(obj),$(START))
+
+all:	$(obj).depend $(START) $(LIB)
+
+$(LIB):	$(OBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/arch/powerpc/cpu/74xx_7xx/cache.S b/arch/powerpc/cpu/74xx_7xx/cache.S
new file mode 100644
index 0000000..66c7298
--- /dev/null
+++ b/arch/powerpc/cpu/74xx_7xx/cache.S
@@ -0,0 +1,404 @@
+#include <config.h>
+#include <74xx_7xx.h>
+#include <version.h>
+
+#include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+
+#include <asm/cache.h>
+#include <asm/mmu.h>
+
+#ifndef CACHE_LINE_SIZE
+# define CACHE_LINE_SIZE L1_CACHE_BYTES
+#endif
+
+#if CACHE_LINE_SIZE == 128
+#define LG_CACHE_LINE_SIZE 7
+#elif CACHE_LINE_SIZE == 32
+#define LG_CACHE_LINE_SIZE 5
+#elif CACHE_LINE_SIZE == 16
+#define LG_CACHE_LINE_SIZE 4
+#elif CACHE_LINE_SIZE == 8
+#define LG_CACHE_LINE_SIZE 3
+#else
+# error "Invalid cache line size!"
+#endif
+
+/*
+ * Invalidate L1 instruction cache.
+ */
+_GLOBAL(invalidate_l1_instruction_cache)
+	mfspr	r3,PVR
+	rlwinm	r3,r3,16,16,31
+	cmpi	0,r3,1
+	beqlr			/* for 601, do nothing */
+	/* 603/604 processor - use invalidate-all bit in HID0 */
+	mfspr	r3,HID0
+	ori	r3,r3,HID0_ICFI
+	mtspr	HID0,r3
+	isync
+	blr
+
+/*
+ * Invalidate L1 data cache.
+ */
+_GLOBAL(invalidate_l1_data_cache)
+	mfspr	r3,HID0
+	ori	r3,r3,HID0_DCFI
+	mtspr	HID0,r3
+	isync
+	blr
+
+/*
+ * Flush data cache.
+ */
+_GLOBAL(flush_dcache)
+	lis	r3,0
+	lis	r5,CACHE_LINE_SIZE
+flush:
+	cmp	0,1,r3,r5
+	bge	done
+	lwz	r5,0(r3)
+	lis	r5,CACHE_LINE_SIZE
+	addi	r3,r3,0x4
+	b	flush
+done:
+	blr
+/*
+ * Write any modified data cache blocks out to memory
+ * and invalidate the corresponding instruction cache blocks.
+ * This is a no-op on the 601.
+ *
+ * flush_icache_range(unsigned long start, unsigned long stop)
+ */
+_GLOBAL(flush_icache_range)
+	mfspr	r5,PVR
+	rlwinm	r5,r5,16,16,31
+	cmpi	0,r5,1
+	beqlr				/* for 601, do nothing */
+	li	r5,CACHE_LINE_SIZE-1
+	andc	r3,r3,r5
+	subf	r4,r3,r4
+	add	r4,r4,r5
+	srwi.	r4,r4,LG_CACHE_LINE_SIZE
+	beqlr
+	mtctr	r4
+	mr	r6,r3
+1:	dcbst	0,r3
+	addi	r3,r3,CACHE_LINE_SIZE
+	bdnz	1b
+	sync				/* wait for dcbst's to get to ram */
+	mtctr	r4
+2:	icbi	0,r6
+	addi	r6,r6,CACHE_LINE_SIZE
+	bdnz	2b
+	sync				/* additional sync needed on g4 */
+	isync
+	blr
+/*
+ * Write any modified data cache blocks out to memory.
+ * Does not invalidate the corresponding cache lines (especially for
+ * any corresponding instruction cache).
+ *
+ * clean_dcache_range(unsigned long start, unsigned long stop)
+ */
+_GLOBAL(clean_dcache_range)
+	li	r5,CACHE_LINE_SIZE-1
+	andc	r3,r3,r5	/* align r3 down to cache line */
+	subf	r4,r3,r4	/* r4 = offset of stop from start of cache line */
+	add	r4,r4,r5	/* r4 += cache_line_size-1 */
+	srwi.	r4,r4,LG_CACHE_LINE_SIZE  /* r4 = number of cache lines to flush */
+	beqlr				  /* if r4 == 0 return */
+	mtctr	r4			  /* ctr = r4 */
+
+	sync
+1:	dcbst	0,r3
+	addi	r3,r3,CACHE_LINE_SIZE
+	bdnz	1b
+	sync				/* wait for dcbst's to get to ram */
+	blr
+
+/*
+ * Write any modified data cache blocks out to memory
+ * and invalidate the corresponding instruction cache blocks.
+ *
+ * flush_dcache_range(unsigned long start, unsigned long stop)
+ */
+_GLOBAL(flush_dcache_range)
+	li	r5,CACHE_LINE_SIZE-1
+	andc	r3,r3,r5
+	subf	r4,r3,r4
+	add	r4,r4,r5
+	srwi.	r4,r4,LG_CACHE_LINE_SIZE
+	beqlr
+	mtctr	r4
+
+	sync
+1:	dcbf	0,r3
+	addi	r3,r3,CACHE_LINE_SIZE
+	bdnz	1b
+	sync				/* wait for dcbf's to get to ram */
+	blr
+
+/*
+ * Like above, but invalidate the D-cache.  This is used by the 8xx
+ * to invalidate the cache so the PPC core doesn't get stale data
+ * from the CPM (no cache snooping here :-).
+ *
+ * invalidate_dcache_range(unsigned long start, unsigned long stop)
+ */
+_GLOBAL(invalidate_dcache_range)
+	li	r5,CACHE_LINE_SIZE-1
+	andc	r3,r3,r5
+	subf	r4,r3,r4
+	add	r4,r4,r5
+	srwi.	r4,r4,LG_CACHE_LINE_SIZE
+	beqlr
+	mtctr	r4
+
+	sync
+1:	dcbi	0,r3
+	addi	r3,r3,CACHE_LINE_SIZE
+	bdnz	1b
+	sync				/* wait for dcbi's to get to ram */
+	blr
+
+/*
+ * Flush a particular page from the data cache to RAM.
+ * Note: this is necessary because the instruction cache does *not*
+ * snoop from the data cache.
+ * This is a no-op on the 601 which has a unified cache.
+ *
+ *	void __flush_page_to_ram(void *page)
+ */
+_GLOBAL(__flush_page_to_ram)
+	mfspr	r5,PVR
+	rlwinm	r5,r5,16,16,31
+	cmpi	0,r5,1
+	beqlr				/* for 601, do nothing */
+	rlwinm	r3,r3,0,0,19		/* Get page base address */
+	li	r4,4096/CACHE_LINE_SIZE	/* Number of lines in a page */
+	mtctr	r4
+	mr	r6,r3
+0:	dcbst	0,r3			/* Write line to ram */
+	addi	r3,r3,CACHE_LINE_SIZE
+	bdnz	0b
+	sync
+	mtctr	r4
+1:	icbi	0,r6
+	addi	r6,r6,CACHE_LINE_SIZE
+	bdnz	1b
+	sync
+	isync
+	blr
+
+/*
+ * Flush a particular page from the instruction cache.
+ * Note: this is necessary because the instruction cache does *not*
+ * snoop from the data cache.
+ * This is a no-op on the 601 which has a unified cache.
+ *
+ *	void __flush_icache_page(void *page)
+ */
+_GLOBAL(__flush_icache_page)
+	mfspr	r5,PVR
+	rlwinm	r5,r5,16,16,31
+	cmpi	0,r5,1
+	beqlr				/* for 601, do nothing */
+	li	r4,4096/CACHE_LINE_SIZE	/* Number of lines in a page */
+	mtctr	r4
+1:	icbi	0,r3
+	addi	r3,r3,CACHE_LINE_SIZE
+	bdnz	1b
+	sync
+	isync
+	blr
+
+/*
+ * Clear a page using the dcbz instruction, which doesn't cause any
+ * memory traffic (except to write out any cache lines which get
+ * displaced).  This only works on cacheable memory.
+ */
+_GLOBAL(clear_page)
+	li	r0,4096/CACHE_LINE_SIZE
+	mtctr	r0
+1:	dcbz	0,r3
+	addi	r3,r3,CACHE_LINE_SIZE
+	bdnz	1b
+	blr
+
+/*
+ * Enable L1 Instruction cache
+ */
+_GLOBAL(icache_enable)
+	mfspr	r3, HID0
+	li	r5, HID0_ICFI|HID0_ILOCK
+	andc	r3, r3, r5
+	ori	r3, r3, HID0_ICE
+	ori	r5, r3, HID0_ICFI
+	mtspr	HID0, r5
+	mtspr	HID0, r3
+	isync
+	blr
+
+/*
+ * Disable L1 Instruction cache
+ */
+_GLOBAL(icache_disable)
+	mflr	r4
+	bl	invalidate_l1_instruction_cache		/* uses r3 */
+	sync
+	mtlr	r4
+	mfspr	r3, HID0
+	li	r5, 0
+	ori	r5, r5, HID0_ICE
+	andc	r3, r3, r5
+	mtspr	HID0, r3
+	isync
+	blr
+
+/*
+ * Is instruction cache enabled?
+ */
+_GLOBAL(icache_status)
+	mfspr	r3, HID0
+	andi.	r3, r3, HID0_ICE
+	blr
+
+
+_GLOBAL(l1dcache_enable)
+	mfspr	r3, HID0
+	li	r5, HID0_DCFI|HID0_DLOCK
+	andc	r3, r3, r5
+	mtspr	HID0, r3		/* no invalidate, unlock */
+	ori	r3, r3, HID0_DCE
+	ori	r5, r3, HID0_DCFI
+	mtspr	HID0, r5		/* enable + invalidate */
+	mtspr	HID0, r3		/* enable */
+	sync
+	blr
+
+/*
+ * Enable data cache(s) - L1 and optionally L2
+ * Calls l2cache_enable. LR saved in r5
+ */
+_GLOBAL(dcache_enable)
+	mfspr	r3, HID0
+	li	r5, HID0_DCFI|HID0_DLOCK
+	andc	r3, r3, r5
+	mtspr	HID0, r3		/* no invalidate, unlock */
+	ori	r3, r3, HID0_DCE
+	ori	r5, r3, HID0_DCFI
+	mtspr	HID0, r5		/* enable + invalidate */
+	mtspr	HID0, r3		/* enable */
+	sync
+#ifdef CONFIG_SYS_L2
+	mflr	r5
+	bl	l2cache_enable		/* uses r3 and r4 */
+	sync
+	mtlr	r5
+#endif
+	blr
+
+
+/*
+ * Disable data cache(s) - L1 and optionally L2
+ * Calls flush_dcache and l2cache_disable_no_flush.
+ * LR saved in r4
+ */
+_GLOBAL(dcache_disable)
+	mflr	r4			/* save link register */
+	bl	flush_dcache	/* uses r3 and r5 */
+	sync
+	mfspr	r3, HID0
+	li	r5, HID0_DCFI|HID0_DLOCK
+	andc	r3, r3, r5
+	mtspr	HID0, r3		/* no invalidate, unlock */
+	li	r5, HID0_DCE|HID0_DCFI
+	andc	r3, r3, r5		/* no enable, no invalidate */
+	mtspr	HID0, r3
+	sync
+#ifdef CONFIG_SYS_L2
+	bl	l2cache_disable_no_flush /* uses r3 */
+#endif
+	mtlr	r4			/* restore link register */
+	blr
+
+/*
+ * Is data cache enabled?
+ */
+_GLOBAL(dcache_status)
+	mfspr	r3, HID0
+	andi.	r3, r3, HID0_DCE
+	blr
+
+/*
+ * Invalidate L2 cache using L2I and polling L2IP or L2I
+ */
+_GLOBAL(l2cache_invalidate)
+	sync
+	mfspr r3, l2cr
+	oris	r3, r3, L2CR_L2I@h
+	sync
+	mtspr	l2cr, r3
+	sync
+	mfspr r3, PVR
+	sync
+	rlwinm r3, r3, 16,16,31
+	cmpli 0,r3,0x8000  /* 7451, 7441 */
+	beq 0,inv_7450
+	cmpli 0,r3,0x8001  /* 7455, 7445 */
+	beq 0,inv_7450
+	cmpli 0,r3,0x8002  /* 7457, 7447 */
+	beq 0,inv_7450
+	cmpli 0,r3,0x8003  /* 7447A */
+	beq 0,inv_7450
+	cmpli 0,r3,0x8004  /* 7448 */
+	beq 0,inv_7450
+invl2:
+	mfspr	r3, l2cr
+	andi.	r3, r3, L2CR_L2IP
+	bne	invl2
+	/* turn off the global invalidate bit */
+	mfspr	r3, l2cr
+	rlwinm	r3, r3, 0, 11, 9
+	sync
+	mtspr	l2cr, r3
+	sync
+	blr
+inv_7450:
+	mfspr	r3, l2cr
+	andis. r3, r3, L2CR_L2I@h
+	bne inv_7450
+	blr
+
+/*
+ * Enable L2 cache
+ * Calls l2cache_invalidate. LR is saved in r4
+ */
+_GLOBAL(l2cache_enable)
+	mflr	r4			/* save link register */
+	bl	l2cache_invalidate	/* uses r3 */
+	sync
+	lis	r3, L2_ENABLE@h
+	ori	r3, r3, L2_ENABLE@l
+	mtspr	l2cr, r3
+	isync
+	mtlr	r4			/* restore link register */
+	blr
+
+/*
+ * Disable L2 cache
+ * Calls flush_dcache. LR is saved in r4
+ */
+_GLOBAL(l2cache_disable)
+	mflr	r4			/* save link register */
+	bl	flush_dcache		/* uses r3 and r5 */
+	sync
+	mtlr	r4			/* restore link register */
+l2cache_disable_no_flush:		/* provide way to disable L2 w/o flushing */
+	lis	r3, L2_INIT@h
+	ori	r3, r3, L2_INIT@l
+	mtspr	l2cr, r3
+	isync
+	blr
diff --git a/arch/powerpc/cpu/74xx_7xx/config.mk b/arch/powerpc/cpu/74xx_7xx/config.mk
new file mode 100644
index 0000000..df1f6ac
--- /dev/null
+++ b/arch/powerpc/cpu/74xx_7xx/config.mk
@@ -0,0 +1,26 @@
+#
+# (C) Copyright 2001
+# Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
+#
+# 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 += -fPIC -meabi
+
+PLATFORM_CPPFLAGS += -DCONFIG_74xx_7xx -ffixed-r2 -mstring
diff --git a/arch/powerpc/cpu/74xx_7xx/cpu.c b/arch/powerpc/cpu/74xx_7xx/cpu.c
new file mode 100644
index 0000000..3c17277
--- /dev/null
+++ b/arch/powerpc/cpu/74xx_7xx/cpu.c
@@ -0,0 +1,320 @@
+/*
+ * (C) Copyright 2001
+ * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
+ *
+ * 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.c
+ *
+ * CPU specific code
+ *
+ * written or collected and sometimes rewritten by
+ * Magnus Damm <damm@bitsmart.com>
+ *
+ * minor modifications by
+ * Wolfgang Denk <wd@denx.de>
+ *
+ * more modifications by
+ * Josh Huber <huber@mclx.com>
+ * added support for the 74xx series of cpus
+ * added support for the 7xx series of cpus
+ * made the code a little less hard-coded, and more auto-detectish
+ */
+
+#include <common.h>
+#include <command.h>
+#include <74xx_7xx.h>
+#include <asm/cache.h>
+
+#if defined(CONFIG_OF_LIBFDT)
+#include <libfdt.h>
+#include <fdt_support.h>
+#endif
+
+#ifdef CONFIG_AMIGAONEG3SE
+#include "../board/MAI/AmigaOneG3SE/via686.h"
+#include "../board/MAI/AmigaOneG3SE/memio.h"
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+cpu_t
+get_cpu_type(void)
+{
+	uint pvr = get_pvr();
+	cpu_t type;
+
+	type = CPU_UNKNOWN;
+
+	switch (PVR_VER(pvr)) {
+	case 0x000c:
+		type = CPU_7400;
+		break;
+	case 0x0008:
+		type = CPU_750;
+
+		if (((pvr >> 8) & 0xff) == 0x01) {
+			type = CPU_750CX;	/* old CX (80100 and 8010x?)*/
+		} else if (((pvr >> 8) & 0xff) == 0x22) {
+			type = CPU_750CX;	/* CX (82201,82202) and CXe (82214) */
+		} else if (((pvr >> 8) & 0xff) == 0x33) {
+			type = CPU_750CX;	/* CXe (83311) */
+		} else if (((pvr >> 12) & 0xF) == 0x3) {
+			type = CPU_755;
+		}
+		break;
+
+	case 0x7000:
+		type = CPU_750FX;
+		break;
+
+	case 0x7002:
+		type = CPU_750GX;
+		break;
+
+	case 0x800C:
+		type = CPU_7410;
+		break;
+
+	case 0x8000:
+		type = CPU_7450;
+		break;
+
+	case 0x8001:
+		type = CPU_7455;
+		break;
+
+	case 0x8002:
+		type = CPU_7457;
+		break;
+
+	case 0x8003:
+		type = CPU_7447A;
+		break;
+
+	case 0x8004:
+		type = CPU_7448;
+		break;
+
+	default:
+		break;
+	}
+
+	return type;
+}
+
+/* ------------------------------------------------------------------------- */
+
+#if !defined(CONFIG_BAB7xx)
+int checkcpu (void)
+{
+	uint type   = get_cpu_type();
+	uint pvr    = get_pvr();
+	ulong clock = gd->cpu_clk;
+	char buf[32];
+	char *str;
+
+	puts ("CPU:   ");
+
+	switch (type) {
+	case CPU_750CX:
+		printf ("750CX%s v%d.%d", (pvr&0xf0)?"e":"",
+			(pvr>>8) & 0xf,
+			pvr & 0xf);
+		goto	PR_CLK;
+
+	case CPU_750:
+		str = "750";
+		break;
+
+	case CPU_750FX:
+		str = "750FX";
+		break;
+
+	case CPU_750GX:
+		str = "750GX";
+		break;
+
+	case CPU_755:
+		str = "755";
+		break;
+
+	case CPU_7400:
+		str = "MPC7400";
+		break;
+
+	case CPU_7410:
+		str = "MPC7410";
+		break;
+
+	case CPU_7447A:
+		str = "MPC7447A";
+		break;
+
+	case CPU_7448:
+		str = "MPC7448";
+		break;
+
+	case CPU_7450:
+		str = "MPC7450";
+		break;
+
+	case CPU_7455:
+		str = "MPC7455";
+		break;
+
+	case CPU_7457:
+		str = "MPC7457";
+		break;
+
+	default:
+		printf("Unknown CPU -- PVR: 0x%08x\n", pvr);
+		return -1;
+	}
+
+	printf ("%s v%d.%d", str, (pvr >> 8) & 0xFF, pvr & 0xFF);
+PR_CLK:
+	printf (" @ %s MHz\n", strmhz(buf, clock));
+
+	return (0);
+}
+#endif
+/* these two functions are unimplemented currently [josh] */
+
+/* -------------------------------------------------------------------- */
+/* L1 i-cache								*/
+
+int
+checkicache(void)
+{
+	return 0; /* XXX */
+}
+
+/* -------------------------------------------------------------------- */
+/* L1 d-cache								*/
+
+int
+checkdcache(void)
+{
+	return 0; /* XXX */
+}
+
+/* -------------------------------------------------------------------- */
+
+static inline void
+soft_restart(unsigned long addr)
+{
+	/* SRR0 has system reset vector, SRR1 has default MSR value */
+	/* rfi restores MSR from SRR1 and sets the PC to the SRR0 value */
+
+	__asm__ __volatile__ ("mtspr	26, %0"		:: "r" (addr));
+	__asm__ __volatile__ ("li	4, (1 << 6)"	::: "r4");
+	__asm__ __volatile__ ("mtspr	27, 4");
+	__asm__ __volatile__ ("rfi");
+
+	while(1);	/* not reached */
+}
+
+
+#if !defined(CONFIG_PCIPPC2) && \
+    !defined(CONFIG_BAB7xx)  && \
+    !defined(CONFIG_ELPPC)   && \
+    !defined(CONFIG_PPMC7XX)
+/* no generic way to do board reset. simply call soft_reset. */
+void
+do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	ulong addr;
+	/* flush and disable I/D cache */
+	__asm__ __volatile__ ("mfspr	3, 1008"	::: "r3");
+	__asm__ __volatile__ ("ori	5, 5, 0xcc00"	::: "r5");
+	__asm__ __volatile__ ("ori	4, 3, 0xc00"	::: "r4");
+	__asm__ __volatile__ ("andc	5, 3, 5"	::: "r5");
+	__asm__ __volatile__ ("sync");
+	__asm__ __volatile__ ("mtspr	1008, 4");
+	__asm__ __volatile__ ("isync");
+	__asm__ __volatile__ ("sync");
+	__asm__ __volatile__ ("mtspr	1008, 5");
+	__asm__ __volatile__ ("isync");
+	__asm__ __volatile__ ("sync");
+
+#ifdef CONFIG_SYS_RESET_ADDRESS
+	addr = CONFIG_SYS_RESET_ADDRESS;
+#else
+	/*
+	 * note: when CONFIG_SYS_MONITOR_BASE points to a RAM address,
+	 * CONFIG_SYS_MONITOR_BASE - sizeof (ulong) is usually a valid
+	 * address. Better pick an address known to be invalid on your
+	 * system and assign it to CONFIG_SYS_RESET_ADDRESS.
+	 */
+	addr = CONFIG_SYS_MONITOR_BASE - sizeof (ulong);
+#endif
+	soft_restart(addr);
+	while(1);	/* not reached */
+}
+#endif
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * For the 7400 the TB clock runs at 1/4 the cpu bus speed.
+ */
+#if defined(CONFIG_AMIGAONEG3SE) || defined(CONFIG_SYS_CONFIG_BUS_CLK)
+unsigned long get_tbclk(void)
+{
+	return (gd->bus_clk / 4);
+}
+#else	/* ! CONFIG_AMIGAONEG3SE and !CONFIG_SYS_CONFIG_BUS_CLK*/
+
+unsigned long get_tbclk (void)
+{
+	return CONFIG_SYS_BUS_HZ / 4;
+}
+#endif	/* CONFIG_AMIGAONEG3SE or CONFIG_SYS_CONFIG_BUS_CLK*/
+/* ------------------------------------------------------------------------- */
+#if defined(CONFIG_WATCHDOG)
+#if !defined(CONFIG_PCIPPC2) && !defined(CONFIG_BAB7xx)
+void
+watchdog_reset(void)
+{
+
+}
+#endif  /* !CONFIG_PCIPPC2 && !CONFIG_BAB7xx */
+#endif	/* CONFIG_WATCHDOG */
+
+/* ------------------------------------------------------------------------- */
+
+#ifdef CONFIG_OF_LIBFDT
+void ft_cpu_setup(void *blob, bd_t *bd)
+{
+	do_fixup_by_prop_u32(blob, "device_type", "cpu", 4,
+			     "timebase-frequency", bd->bi_busfreq / 4, 1);
+	do_fixup_by_prop_u32(blob, "device_type", "cpu", 4,
+			     "bus-frequency", bd->bi_busfreq, 1);
+	do_fixup_by_prop_u32(blob, "device_type", "cpu", 4,
+			     "clock-frequency", bd->bi_intfreq, 1);
+
+	fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
+
+	fdt_fixup_ethernet(blob);
+}
+#endif
+/* ------------------------------------------------------------------------- */
diff --git a/arch/powerpc/cpu/74xx_7xx/cpu_init.c b/arch/powerpc/cpu/74xx_7xx/cpu_init.c
new file mode 100644
index 0000000..1dd1b2c
--- /dev/null
+++ b/arch/powerpc/cpu/74xx_7xx/cpu_init.c
@@ -0,0 +1,63 @@
+/*
+ * (C) Copyright 2001
+ * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
+ *
+ * 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_init.c - low level cpu init
+ *
+ * there's really nothing going on here yet.  future work area?
+ */
+
+#include <common.h>
+#include <74xx_7xx.h>
+
+/*
+ * Breath some life into the CPU...
+ *
+ * there's basically nothing to do here since the memory controller
+ * isn't on the CPU in this case.
+ */
+void
+cpu_init_f (void)
+{
+	switch (get_cpu_type()) {
+	case CPU_7450:
+	case CPU_7455:
+	case CPU_7457:
+	case CPU_7447A:
+	case CPU_7448:
+		/* enable the timebase bit in HID0 */
+		set_hid0(get_hid0() | 0x4000000);
+		break;
+	default:
+		/* do nothing */
+		break;
+	}
+}
+
+/*
+ * initialize higher level parts of CPU like timers
+ */
+int cpu_init_r (void)
+{
+	return (0);
+}
diff --git a/arch/powerpc/cpu/74xx_7xx/interrupts.c b/arch/powerpc/cpu/74xx_7xx/interrupts.c
new file mode 100644
index 0000000..0ea1aec
--- /dev/null
+++ b/arch/powerpc/cpu/74xx_7xx/interrupts.c
@@ -0,0 +1,105 @@
+/*
+ * (C) Copyright 2001
+ * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
+ *
+ * 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
+ */
+
+/*
+ * interrupts.c - just enough support for the decrementer/timer
+ */
+
+#include <common.h>
+#include <mpc8xx.h>
+#include <mpc8xx_irq.h>
+#include <asm/processor.h>
+#include <commproc.h>
+#include <command.h>
+
+int interrupt_init_cpu (unsigned *decrementer_count)
+{
+#if defined(DEBUG) && !defined(CONFIG_AMIGAONEG3SE)
+	printf("interrupt_init: GT main cause reg: %08x:%08x\n",
+	       GTREGREAD(LOW_INTERRUPT_CAUSE_REGISTER),
+	       GTREGREAD(HIGH_INTERRUPT_CAUSE_REGISTER));
+	printf("interrupt_init: ethernet cause regs: %08x %08x %08x\n",
+	       GTREGREAD(ETHERNET0_INTERRUPT_CAUSE_REGISTER),
+	       GTREGREAD(ETHERNET1_INTERRUPT_CAUSE_REGISTER),
+	       GTREGREAD(ETHERNET2_INTERRUPT_CAUSE_REGISTER));
+	printf("interrupt_init: ethernet mask regs:  %08x %08x %08x\n",
+	       GTREGREAD(ETHERNET0_INTERRUPT_MASK_REGISTER),
+	       GTREGREAD(ETHERNET1_INTERRUPT_MASK_REGISTER),
+	       GTREGREAD(ETHERNET2_INTERRUPT_MASK_REGISTER));
+	puts("interrupt_init: setting decrementer_count\n");
+#endif
+	*decrementer_count = get_tbclk() / CONFIG_SYS_HZ;
+
+	return (0);
+}
+
+/****************************************************************************/
+
+/*
+ * Handle external interrupts
+ */
+void
+external_interrupt(struct pt_regs *regs)
+{
+	puts("external_interrupt (oops!)\n");
+}
+
+volatile ulong timestamp = 0;
+
+/*
+ * timer_interrupt - gets called when the decrementer overflows,
+ * with interrupts disabled.
+ * Trivial implementation - no need to be really accurate.
+ */
+void
+timer_interrupt_cpu (struct pt_regs *regs)
+{
+	/* nothing to do here */
+	return;
+}
+
+/****************************************************************************/
+
+/*
+ * Install and free a interrupt handler.
+ */
+
+void
+irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
+{
+
+}
+
+void
+irq_free_handler(int vec)
+{
+
+}
+
+/****************************************************************************/
+
+void
+do_irqinfo(cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
+{
+	puts("IRQ related functions are unimplemented currently.\n");
+}
diff --git a/arch/powerpc/cpu/74xx_7xx/io.S b/arch/powerpc/cpu/74xx_7xx/io.S
new file mode 100644
index 0000000..af2e6d1
--- /dev/null
+++ b/arch/powerpc/cpu/74xx_7xx/io.S
@@ -0,0 +1,128 @@
+/*
+ *  Copyright (C) 1998	Dan Malek <dmalek@jlc.net>
+ *  Copyright (C) 1999	Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
+ *  Copyright (C) 2001	Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ *			Andreas Heppel <aheppel@sysgo.de>
+ *  Copyright (C) 2002	Wolfgang Denk <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 <config.h>
+#include <ppc_asm.tmpl>
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:     in8 */
+/*  Description:  Input 8 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl  in8
+in8:
+	lbz     r3,0(r3)
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:     in16 */
+/*  Description:  Input 16 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl  in16
+in16:
+	lhz     r3,0(r3)
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:     in16r */
+/*  Description:  Input 16 bits and byte reverse */
+/* ------------------------------------------------------------------------------- */
+	.globl  in16r
+in16r:
+	lhbrx   r3,0,r3
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:     in32 */
+/*  Description:  Input 32 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl  in32
+in32:
+	lwz     3,0(3)
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:     in32r */
+/*  Description:  Input 32 bits and byte reverse */
+/* ------------------------------------------------------------------------------- */
+    .globl  in32r
+in32r:
+	lwbrx   r3,0,r3
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:     out8 */
+/*  Description:  Output 8 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl  out8
+out8:
+	stb     r4,0(r3)
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:     out16 */
+/*  Description:  Output 16 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl  out16
+out16:
+	sth     r4,0(r3)
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:     out16r */
+/*  Description:  Byte reverse and output 16 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl  out16r
+out16r:
+	sthbrx  r4,0,r3
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:     out32 */
+/*  Description:  Output 32 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl  out32
+out32:
+	stw     r4,0(r3)
+	sync
+	blr
+
+/* ------------------------------------------------------------------------------- */
+/*  Function:     out32r */
+/*  Description:  Byte reverse and output 32 bits */
+/* ------------------------------------------------------------------------------- */
+	.globl  out32r
+out32r:
+	stwbrx  r4,0,r3
+	sync
+	blr
diff --git a/arch/powerpc/cpu/74xx_7xx/kgdb.S b/arch/powerpc/cpu/74xx_7xx/kgdb.S
new file mode 100644
index 0000000..ad487cd
--- /dev/null
+++ b/arch/powerpc/cpu/74xx_7xx/kgdb.S
@@ -0,0 +1,77 @@
+/*
+ *  Copyright (C) 2000	Murray Jensen <Murray.Jensen@cmst.csiro.au>
+ *
+ * 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 02111-1307USA
+ */
+
+#include <config.h>
+#include <command.h>
+#include <74xx_7xx.h>
+#include <version.h>
+
+#include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+
+#include <asm/cache.h>
+#include <asm/mmu.h>
+
+#if defined(CONFIG_CMD_KGDB)
+
+ /*
+ * cache flushing routines for kgdb
+ */
+
+	.globl	kgdb_flush_cache_all
+kgdb_flush_cache_all:
+	lis	r3,0
+	addis	r4,r0,0x0040
+kgdb_flush_loop:
+	lwz	r5,0(r3)
+	addi	r3,r3,CONFIG_SYS_CACHELINE_SIZE
+	cmp	0,0,r3,r4
+	bne	kgdb_flush_loop
+	SYNC
+	mfspr	r3,1008
+	ori	r3,r3,0x8800
+	mtspr	1008,r3
+	sync
+	blr
+
+	.globl	kgdb_flush_cache_range
+kgdb_flush_cache_range:
+	li	r5,CONFIG_SYS_CACHELINE_SIZE-1
+	andc	r3,r3,r5
+	subf	r4,r3,r4
+	add	r4,r4,r5
+	srwi.	r4,r4,CONFIG_SYS_CACHELINE_SHIFT
+	beqlr
+	mtctr	r4
+	mr	r6,r3
+1:	dcbst	0,r3
+	addi	r3,r3,CONFIG_SYS_CACHELINE_SIZE
+	bdnz	1b
+	sync				/* wait for dcbst's to get to ram */
+	mtctr	r4
+2:	icbi	0,r6
+	addi	r6,r6,CONFIG_SYS_CACHELINE_SIZE
+	bdnz	2b
+	SYNC
+	blr
+
+#endif
diff --git a/arch/powerpc/cpu/74xx_7xx/speed.c b/arch/powerpc/cpu/74xx_7xx/speed.c
new file mode 100644
index 0000000..f2fdcd5
--- /dev/null
+++ b/arch/powerpc/cpu/74xx_7xx/speed.c
@@ -0,0 +1,185 @@
+/*
+ * (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 <common.h>
+#include <74xx_7xx.h>
+#include <asm/processor.h>
+
+#ifdef CONFIG_AMIGAONEG3SE
+#include "../board/MAI/AmigaOneG3SE/via686.h"
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+extern unsigned long get_board_bus_clk (void);
+
+static const int hid1_multipliers_x_10[] = {
+	25,	/* 0000 - 2.5x */
+	75,	/* 0001 - 7.5x */
+	70,	/* 0010 - 7x */
+	10,	/* 0011 - bypass */
+	20,	/* 0100 - 2x */
+	65,	/* 0101 - 6.5x */
+	100,	/* 0110 - 10x */
+	45,	/* 0111 - 4.5x */
+	30,	/* 1000 - 3x */
+	55,	/* 1001 - 5.5x */
+	40,	/* 1010 - 4x */
+	50,	/* 1011 - 5x */
+	80,	/* 1100 - 8x */
+	60,	/* 1101 - 6x */
+	35,	/* 1110 - 3.5x */
+	0	/* 1111 - off */
+};
+
+/* PLL_CFG[0:4] table for cpu 7448/7447A/7455/7457 */
+static const int hid1_74xx_multipliers_x_10[] = {
+	115,	/* 00000 - 11.5x  */
+	170,	/* 00001 - 17x    */
+	75,	/* 00010 -  7.5x  */
+	150,	/* 00011 - 15x    */
+	70,	/* 00100 -  7x    */
+	180,	/* 00101 - 18x    */
+	10,	/* 00110 - bypass */
+	200,	/* 00111 - 20x    */
+	20,	/* 01000 -  2x    */
+	210,	/* 01001 - 21x    */
+	65,	/* 01010 -  6.5x  */
+	130,	/* 01011 - 13x    */
+	85,	/* 01100 -  8.5x  */
+	240,	/* 01101 - 24x    */
+	95,	/* 01110 -  9.5x  */
+	90,	/* 01111 -  9x    */
+	30,	/* 10000 -  3x    */
+	105,	/* 10001 - 10.5x  */
+	55,	/* 10010 -  5.5x  */
+	110,	/* 10011 - 11x    */
+	40,	/* 10100 -  4x    */
+	100,	/* 10101 - 10x    */
+	50,	/* 10110 -  5x    */
+	120,	/* 10111 - 12x    */
+	80,	/* 11000 -  8x    */
+	140,	/* 11001 - 14x    */
+	60,	/* 11010 -  6x    */
+	160,	/* 11011 - 16x    */
+	135,	/* 11100 - 13.5x  */
+	280,	/* 11101 - 28x    */
+	0,	/* 11110 - off    */
+	125	/* 11111 - 12.5x  */
+};
+
+static const int hid1_fx_multipliers_x_10[] = {
+	00,	/* 0000 - off */
+	00,	/* 0001 - off */
+	10,	/* 0010 - bypass */
+	10,	/* 0011 - bypass */
+	20,	/* 0100 - 2x */
+	25,	/* 0101 - 2.5x */
+	30,	/* 0110 - 3x */
+	35,	/* 0111 - 3.5x */
+	40,	/* 1000 - 4x */
+	45,	/* 1001 - 4.5x */
+	50,	/* 1010 - 5x */
+	55,	/* 1011 - 5.5x */
+	60,	/* 1100 - 6x */
+	65,	/* 1101 - 6.5x */
+	70,	/* 1110 - 7x */
+	75,	/* 1111 - 7.5 */
+	80,	/* 10000 - 8x */
+	85,	/* 10001 - 8.5x */
+	90,	/* 10010 - 9x */
+	95,	/* 10011 - 9.5x */
+	100,	/* 10100 - 10x */
+	110,	/* 10101 - 11x */
+	120,	/* 10110 - 12x */
+};
+
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * Measure CPU clock speed (core clock GCLK1, GCLK2)
+ *
+ * (Approx. GCLK frequency in Hz)
+ */
+
+int get_clocks (void)
+{
+	ulong clock = 0;
+
+#ifdef CONFIG_SYS_BUS_CLK
+	gd->bus_clk = CONFIG_SYS_BUS_CLK;	/* bus clock is a fixed frequency */
+#else
+	gd->bus_clk = get_board_bus_clk ();	/* bus clock is configurable */
+#endif
+
+	/* calculate the clock frequency based upon the CPU type */
+	switch (get_cpu_type()) {
+	case CPU_7447A:
+	case CPU_7448:
+	case CPU_7455:
+	case CPU_7457:
+		/*
+		 * Make sure division is done before multiplication to prevent 32-bit
+		 * arithmetic overflows which will cause a negative number
+		 */
+		clock = (gd->bus_clk / 10) *
+			hid1_74xx_multipliers_x_10[(get_hid1 () >> 12) & 0x1F];
+		break;
+
+	case CPU_750GX:
+	case CPU_750FX:
+		clock = (gd->bus_clk / 10) *
+			hid1_fx_multipliers_x_10[get_hid1 () >> 27];
+		break;
+
+	case CPU_7450:
+	case CPU_740:
+	case CPU_740P:
+	case CPU_745:
+	case CPU_750CX:
+	case CPU_750:
+	case CPU_750P:
+	case CPU_755:
+	case CPU_7400:
+	case CPU_7410:
+		/*
+		 * Make sure division is done before multiplication to prevent 32-bit
+		 * arithmetic overflows which will cause a negative number
+		 */
+		clock = (gd->bus_clk / 10) *
+			hid1_multipliers_x_10[get_hid1 () >> 28];
+		break;
+
+	case CPU_UNKNOWN:
+	       printf ("get_gclk_freq(): unknown CPU type\n");
+	       clock = 0;
+	       return (1);
+	}
+
+	gd->cpu_clk = clock;
+
+	return (0);
+}
+
+/* ------------------------------------------------------------------------- */
diff --git a/arch/powerpc/cpu/74xx_7xx/start.S b/arch/powerpc/cpu/74xx_7xx/start.S
new file mode 100644
index 0000000..88fdf88
--- /dev/null
+++ b/arch/powerpc/cpu/74xx_7xx/start.S
@@ -0,0 +1,874 @@
+/*
+ *  Copyright (C) 1998	Dan Malek <dmalek@jlc.net>
+ *  Copyright (C) 1999	Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
+ *  Copyright (C) 2000,2001,2002 Wolfgang Denk <wd@denx.de>
+ *  Copyright (C) 2001  Josh Huber <huber@mclx.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
+ */
+
+/*  U-Boot - Startup Code for PowerPC based Embedded Boards
+ *
+ *
+ *  The processor starts at 0xfff00100 and the code is executed
+ *  from flash. The code is organized to be at an other address
+ *  in memory, but as long we don't jump around before relocating.
+ *  board_init lies at a quite high address and when the cpu has
+ *  jumped there, everything is ok.
+ */
+#include <config.h>
+#include <74xx_7xx.h>
+#include <timestamp.h>
+#include <version.h>
+
+#include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+
+#include <asm/cache.h>
+#include <asm/mmu.h>
+
+#if !defined(CONFIG_DB64360) && \
+    !defined(CONFIG_DB64460) && \
+    !defined(CONFIG_CPCI750) && \
+    !defined(CONFIG_P3Mx)
+#include <galileo/gt64260R.h>
+#endif
+
+#ifndef  CONFIG_IDENT_STRING
+#define  CONFIG_IDENT_STRING ""
+#endif
+
+/* We don't want the  MMU yet.
+*/
+#undef	MSR_KERNEL
+/* Machine Check and Recoverable Interr. */
+#define MSR_KERNEL ( MSR_ME | MSR_RI )
+
+/*
+ * Set up GOT: Global Offset Table
+ *
+ * Use r12 to access the GOT
+ */
+	START_GOT
+	GOT_ENTRY(_GOT2_TABLE_)
+	GOT_ENTRY(_FIXUP_TABLE_)
+
+	GOT_ENTRY(_start)
+	GOT_ENTRY(_start_of_vectors)
+	GOT_ENTRY(_end_of_vectors)
+	GOT_ENTRY(transfer_to_handler)
+
+	GOT_ENTRY(__init_end)
+	GOT_ENTRY(_end)
+	GOT_ENTRY(__bss_start)
+	END_GOT
+
+/*
+ * r3 - 1st arg to board_init(): IMMP pointer
+ * r4 - 2nd arg to board_init(): boot flag
+ */
+	.text
+	.long	0x27051956		/* U-Boot Magic Number		*/
+	.globl	version_string
+version_string:
+	.ascii	U_BOOT_VERSION
+	.ascii	" (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
+	.ascii	CONFIG_IDENT_STRING, "\0"
+
+	. = EXC_OFF_SYS_RESET
+	.globl	_start
+_start:
+	li	r21, BOOTFLAG_COLD	/* Normal Power-On: Boot from FLASH */
+	b	boot_cold
+	sync
+
+	. = EXC_OFF_SYS_RESET + 0x10
+
+	.globl	_start_warm
+_start_warm:
+	li	r21, BOOTFLAG_WARM	/* Software reboot		*/
+	b	boot_warm
+	sync
+
+	/* the boot code is located below the exception table */
+
+	.globl	_start_of_vectors
+_start_of_vectors:
+
+/* Machine check */
+	STD_EXCEPTION(0x200, MachineCheck, MachineCheckException)
+
+/* Data Storage exception.  "Never" generated on the 860. */
+	STD_EXCEPTION(0x300, DataStorage, UnknownException)
+
+/* Instruction Storage exception.  "Never" generated on the 860. */
+	STD_EXCEPTION(0x400, InstStorage, UnknownException)
+
+/* External Interrupt exception. */
+	STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt)
+
+/* Alignment exception. */
+	. = 0x600
+Alignment:
+	EXCEPTION_PROLOG(SRR0, SRR1)
+	mfspr	r4,DAR
+	stw	r4,_DAR(r21)
+	mfspr	r5,DSISR
+	stw	r5,_DSISR(r21)
+	addi	r3,r1,STACK_FRAME_OVERHEAD
+	EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE)
+
+/* Program check exception */
+	. = 0x700
+ProgramCheck:
+	EXCEPTION_PROLOG(SRR0, SRR1)
+	addi	r3,r1,STACK_FRAME_OVERHEAD
+	EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException,
+		MSR_KERNEL, COPY_EE)
+
+	/* No FPU on MPC8xx.  This exception is not supposed to happen.
+	*/
+	STD_EXCEPTION(0x800, FPUnavailable, UnknownException)
+
+	/* I guess we could implement decrementer, and may have
+	 * to someday for timekeeping.
+	 */
+	STD_EXCEPTION(0x900, Decrementer, timer_interrupt)
+	STD_EXCEPTION(0xa00, Trap_0a, UnknownException)
+	STD_EXCEPTION(0xb00, Trap_0b, UnknownException)
+	STD_EXCEPTION(0xc00, SystemCall, UnknownException)
+	STD_EXCEPTION(0xd00, SingleStep, UnknownException)
+
+	STD_EXCEPTION(0xe00, Trap_0e, UnknownException)
+	STD_EXCEPTION(0xf00, Trap_0f, UnknownException)
+
+	/*
+	 * On the MPC8xx, this is a software emulation interrupt. It
+	 * occurs for all unimplemented and illegal instructions.
+	 */
+	STD_EXCEPTION(0x1000, SoftEmu, SoftEmuException)
+
+	STD_EXCEPTION(0x1100, InstructionTLBMiss, UnknownException)
+	STD_EXCEPTION(0x1200, DataTLBMiss, UnknownException)
+	STD_EXCEPTION(0x1300, InstructionTLBError, UnknownException)
+	STD_EXCEPTION(0x1400, DataTLBError, UnknownException)
+
+	STD_EXCEPTION(0x1500, Reserved5, UnknownException)
+	STD_EXCEPTION(0x1600, Reserved6, UnknownException)
+	STD_EXCEPTION(0x1700, Reserved7, UnknownException)
+	STD_EXCEPTION(0x1800, Reserved8, UnknownException)
+	STD_EXCEPTION(0x1900, Reserved9, UnknownException)
+	STD_EXCEPTION(0x1a00, ReservedA, UnknownException)
+	STD_EXCEPTION(0x1b00, ReservedB, UnknownException)
+
+	STD_EXCEPTION(0x1c00, DataBreakpoint, UnknownException)
+	STD_EXCEPTION(0x1d00, InstructionBreakpoint, UnknownException)
+	STD_EXCEPTION(0x1e00, PeripheralBreakpoint, UnknownException)
+	STD_EXCEPTION(0x1f00, DevPortBreakpoint, UnknownException)
+
+	.globl	_end_of_vectors
+_end_of_vectors:
+
+	. = 0x2000
+
+boot_cold:
+boot_warm:
+	/* disable everything */
+	li	r0, 0
+	mtspr	HID0, r0
+	sync
+	mtmsr	0
+	bl	invalidate_bats
+	sync
+
+#ifdef CONFIG_SYS_L2
+	/* init the L2 cache */
+	addis	r3, r0, L2_INIT@h
+	ori	r3, r3, L2_INIT@l
+	sync
+	mtspr	l2cr, r3
+#endif
+#if defined(CONFIG_ALTIVEC) && defined(CONFIG_74xx)
+	.long	0x7e00066c
+		/*
+		 * dssall instruction, gas doesn't have it yet
+		 * ...for altivec, data stream stop all this probably
+		 * isn't needed unless we warm (software) reboot U-Boot
+		 */
+#endif
+
+#ifdef CONFIG_SYS_L2
+	/* invalidate the L2 cache */
+	bl	l2cache_invalidate
+	sync
+#endif
+#ifdef CONFIG_SYS_BOARD_ASM_INIT
+	/* do early init */
+	bl	board_asm_init
+#endif
+
+	/*
+	 * Calculate absolute address in FLASH and jump there
+	 *------------------------------------------------------*/
+	lis	r3, CONFIG_SYS_MONITOR_BASE@h
+	ori	r3, r3, CONFIG_SYS_MONITOR_BASE@l
+	addi	r3, r3, in_flash - _start + EXC_OFF_SYS_RESET
+	mtlr	r3
+	blr
+
+in_flash:
+	/* let the C-code set up the rest			*/
+	/*							*/
+	/* Be careful to keep code relocatable !		*/
+	/*------------------------------------------------------*/
+
+	/* perform low-level init */
+	/* sdram init, galileo init, etc */
+	/* r3:	NHR bit from HID0 */
+
+	/* setup the bats */
+	bl	setup_bats
+	sync
+
+	/*
+	 * Cache must be enabled here for stack-in-cache trick.
+	 * This means we need to enable the BATS.
+	 * This means:
+	 *   1) for the EVB, original gt regs need to be mapped
+	 *   2) need to have an IBAT for the 0xf region,
+	 *      we are running there!
+	 * Cache should be turned on after BATs, since by default
+	 * everything is write-through.
+	 * The init-mem BAT can be reused after reloc. The old
+	 * gt-regs BAT can be reused after board_init_f calls
+	 * board_early_init_f (EVB only).
+	 */
+#if !defined(CONFIG_BAB7xx) && !defined(CONFIG_ELPPC) && !defined(CONFIG_P3Mx)
+	/* enable address translation */
+	bl	enable_addr_trans
+	sync
+
+	/* enable and invalidate the data cache */
+	bl	l1dcache_enable
+	sync
+#endif
+#ifdef CONFIG_SYS_INIT_RAM_LOCK
+	bl	lock_ram_in_cache
+	sync
+#endif
+
+	/* set up the stack pointer in our newly created
+	 * cache-ram (r1) */
+	lis	r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@h
+	ori	r1, r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@l
+
+	li	r0, 0		/* Make room for stack frame header and	*/
+	stwu	r0, -4(r1)	/* clear final stack frame so that	*/
+	stwu	r0, -4(r1)	/* stack backtraces terminate cleanly	*/
+
+	GET_GOT			/* initialize GOT access	*/
+
+	/* run low-level CPU init code     (from Flash)	*/
+	bl	cpu_init_f
+	sync
+
+	mr	r3, r21
+
+	/* r3: BOOTFLAG */
+	/* run 1st part of board init code (from Flash)   */
+	bl	board_init_f
+	sync
+
+	/* NOTREACHED */
+
+	.globl	invalidate_bats
+invalidate_bats:
+	/* invalidate BATs */
+	mtspr	IBAT0U, r0
+	mtspr	IBAT1U, r0
+	mtspr	IBAT2U, r0
+	mtspr	IBAT3U, r0
+#ifdef CONFIG_HIGH_BATS
+	mtspr   IBAT4U, r0
+	mtspr   IBAT5U, r0
+	mtspr   IBAT6U, r0
+	mtspr   IBAT7U, r0
+#endif
+	isync
+	mtspr	DBAT0U, r0
+	mtspr	DBAT1U, r0
+	mtspr	DBAT2U, r0
+	mtspr	DBAT3U, r0
+#ifdef CONFIG_HIGH_BATS
+	mtspr   DBAT4U, r0
+	mtspr   DBAT5U, r0
+	mtspr   DBAT6U, r0
+	mtspr   DBAT7U, r0
+#endif
+	isync
+	sync
+	blr
+
+	/* setup_bats - set them up to some initial state */
+	.globl	setup_bats
+setup_bats:
+	addis	r0, r0, 0x0000
+
+	/* IBAT 0 */
+	addis	r4, r0, CONFIG_SYS_IBAT0L@h
+	ori	r4, r4, CONFIG_SYS_IBAT0L@l
+	addis	r3, r0, CONFIG_SYS_IBAT0U@h
+	ori	r3, r3, CONFIG_SYS_IBAT0U@l
+	mtspr	IBAT0L, r4
+	mtspr	IBAT0U, r3
+	isync
+
+	/* DBAT 0 */
+	addis	r4, r0, CONFIG_SYS_DBAT0L@h
+	ori	r4, r4, CONFIG_SYS_DBAT0L@l
+	addis	r3, r0, CONFIG_SYS_DBAT0U@h
+	ori	r3, r3, CONFIG_SYS_DBAT0U@l
+	mtspr	DBAT0L, r4
+	mtspr	DBAT0U, r3
+	isync
+
+	/* IBAT 1 */
+	addis	r4, r0, CONFIG_SYS_IBAT1L@h
+	ori	r4, r4, CONFIG_SYS_IBAT1L@l
+	addis	r3, r0, CONFIG_SYS_IBAT1U@h
+	ori	r3, r3, CONFIG_SYS_IBAT1U@l
+	mtspr	IBAT1L, r4
+	mtspr	IBAT1U, r3
+	isync
+
+	/* DBAT 1 */
+	addis	r4, r0, CONFIG_SYS_DBAT1L@h
+	ori	r4, r4, CONFIG_SYS_DBAT1L@l
+	addis	r3, r0, CONFIG_SYS_DBAT1U@h
+	ori	r3, r3, CONFIG_SYS_DBAT1U@l
+	mtspr	DBAT1L, r4
+	mtspr	DBAT1U, r3
+	isync
+
+	/* IBAT 2 */
+	addis	r4, r0, CONFIG_SYS_IBAT2L@h
+	ori	r4, r4, CONFIG_SYS_IBAT2L@l
+	addis	r3, r0, CONFIG_SYS_IBAT2U@h
+	ori	r3, r3, CONFIG_SYS_IBAT2U@l
+	mtspr	IBAT2L, r4
+	mtspr	IBAT2U, r3
+	isync
+
+	/* DBAT 2 */
+	addis	r4, r0, CONFIG_SYS_DBAT2L@h
+	ori	r4, r4, CONFIG_SYS_DBAT2L@l
+	addis	r3, r0, CONFIG_SYS_DBAT2U@h
+	ori	r3, r3, CONFIG_SYS_DBAT2U@l
+	mtspr	DBAT2L, r4
+	mtspr	DBAT2U, r3
+	isync
+
+	/* IBAT 3 */
+	addis	r4, r0, CONFIG_SYS_IBAT3L@h
+	ori	r4, r4, CONFIG_SYS_IBAT3L@l
+	addis	r3, r0, CONFIG_SYS_IBAT3U@h
+	ori	r3, r3, CONFIG_SYS_IBAT3U@l
+	mtspr	IBAT3L, r4
+	mtspr	IBAT3U, r3
+	isync
+
+	/* DBAT 3 */
+	addis	r4, r0, CONFIG_SYS_DBAT3L@h
+	ori	r4, r4, CONFIG_SYS_DBAT3L@l
+	addis	r3, r0, CONFIG_SYS_DBAT3U@h
+	ori	r3, r3, CONFIG_SYS_DBAT3U@l
+	mtspr	DBAT3L, r4
+	mtspr	DBAT3U, r3
+	isync
+
+#ifdef CONFIG_HIGH_BATS
+	/* IBAT 4 */
+	addis   r4, r0, CONFIG_SYS_IBAT4L@h
+	ori     r4, r4, CONFIG_SYS_IBAT4L@l
+	addis   r3, r0, CONFIG_SYS_IBAT4U@h
+	ori     r3, r3, CONFIG_SYS_IBAT4U@l
+	mtspr   IBAT4L, r4
+	mtspr   IBAT4U, r3
+	isync
+
+	/* DBAT 4 */
+	addis   r4, r0, CONFIG_SYS_DBAT4L@h
+	ori     r4, r4, CONFIG_SYS_DBAT4L@l
+	addis   r3, r0, CONFIG_SYS_DBAT4U@h
+	ori     r3, r3, CONFIG_SYS_DBAT4U@l
+	mtspr   DBAT4L, r4
+	mtspr   DBAT4U, r3
+	isync
+
+	/* IBAT 5 */
+	addis   r4, r0, CONFIG_SYS_IBAT5L@h
+	ori     r4, r4, CONFIG_SYS_IBAT5L@l
+	addis   r3, r0, CONFIG_SYS_IBAT5U@h
+	ori     r3, r3, CONFIG_SYS_IBAT5U@l
+	mtspr   IBAT5L, r4
+	mtspr   IBAT5U, r3
+	isync
+
+	/* DBAT 5 */
+	addis   r4, r0, CONFIG_SYS_DBAT5L@h
+	ori     r4, r4, CONFIG_SYS_DBAT5L@l
+	addis   r3, r0, CONFIG_SYS_DBAT5U@h
+	ori     r3, r3, CONFIG_SYS_DBAT5U@l
+	mtspr   DBAT5L, r4
+	mtspr   DBAT5U, r3
+	isync
+
+	/* IBAT 6 */
+	addis   r4, r0, CONFIG_SYS_IBAT6L@h
+	ori     r4, r4, CONFIG_SYS_IBAT6L@l
+	addis   r3, r0, CONFIG_SYS_IBAT6U@h
+	ori     r3, r3, CONFIG_SYS_IBAT6U@l
+	mtspr   IBAT6L, r4
+	mtspr   IBAT6U, r3
+	isync
+
+	/* DBAT 6 */
+	addis   r4, r0, CONFIG_SYS_DBAT6L@h
+	ori     r4, r4, CONFIG_SYS_DBAT6L@l
+	addis   r3, r0, CONFIG_SYS_DBAT6U@h
+	ori     r3, r3, CONFIG_SYS_DBAT6U@l
+	mtspr   DBAT6L, r4
+	mtspr   DBAT6U, r3
+	isync
+
+	/* IBAT 7 */
+	addis   r4, r0, CONFIG_SYS_IBAT7L@h
+	ori     r4, r4, CONFIG_SYS_IBAT7L@l
+	addis   r3, r0, CONFIG_SYS_IBAT7U@h
+	ori     r3, r3, CONFIG_SYS_IBAT7U@l
+	mtspr   IBAT7L, r4
+	mtspr   IBAT7U, r3
+	isync
+
+	/* DBAT 7 */
+	addis   r4, r0, CONFIG_SYS_DBAT7L@h
+	ori     r4, r4, CONFIG_SYS_DBAT7L@l
+	addis   r3, r0, CONFIG_SYS_DBAT7U@h
+	ori     r3, r3, CONFIG_SYS_DBAT7U@l
+	mtspr   DBAT7L, r4
+	mtspr   DBAT7U, r3
+	isync
+#endif
+
+	/* bats are done, now invalidate the TLBs */
+
+	addis	r3, 0, 0x0000
+	addis	r5, 0, 0x4    /* upper bound of 0x00040000 for 7400/750 */
+
+	isync
+
+tlblp:
+	tlbie	r3
+	sync
+	addi	r3, r3, 0x1000
+	cmp	0, 0, r3, r5
+	blt tlblp
+
+	blr
+
+	.globl enable_addr_trans
+enable_addr_trans:
+	/* enable address translation */
+	mfmsr	r5
+	ori	r5, r5, (MSR_IR | MSR_DR)
+	mtmsr	r5
+	isync
+	blr
+
+	.globl disable_addr_trans
+disable_addr_trans:
+	/* disable address translation */
+	mflr	r4
+	mfmsr	r3
+	andi.	r0, r3, (MSR_IR | MSR_DR)
+	beqlr
+	andc	r3, r3, r0
+	mtspr	SRR0, r4
+	mtspr	SRR1, r3
+	rfi
+
+/*
+ * This code finishes saving the registers to the exception frame
+ * and jumps to the appropriate handler for the exception.
+ * Register r21 is pointer into trap frame, r1 has new stack pointer.
+ */
+	.globl	transfer_to_handler
+transfer_to_handler:
+	stw	r22,_NIP(r21)
+	lis	r22,MSR_POW@h
+	andc	r23,r23,r22
+	stw	r23,_MSR(r21)
+	SAVE_GPR(7, r21)
+	SAVE_4GPRS(8, r21)
+	SAVE_8GPRS(12, r21)
+	SAVE_8GPRS(24, r21)
+	mflr	r23
+	andi.	r24,r23,0x3f00		/* get vector offset */
+	stw	r24,TRAP(r21)
+	li	r22,0
+	stw	r22,RESULT(r21)
+	mtspr	SPRG2,r22		/* r1 is now kernel sp */
+	lwz	r24,0(r23)		/* virtual address of handler */
+	lwz	r23,4(r23)		/* where to go when done */
+	mtspr	SRR0,r24
+	mtspr	SRR1,r20
+	mtlr	r23
+	SYNC
+	rfi				/* jump to handler, enable MMU */
+
+int_return:
+	mfmsr	r28		/* Disable interrupts */
+	li	r4,0
+	ori	r4,r4,MSR_EE
+	andc	r28,r28,r4
+	SYNC			/* Some chip revs need this... */
+	mtmsr	r28
+	SYNC
+	lwz	r2,_CTR(r1)
+	lwz	r0,_LINK(r1)
+	mtctr	r2
+	mtlr	r0
+	lwz	r2,_XER(r1)
+	lwz	r0,_CCR(r1)
+	mtspr	XER,r2
+	mtcrf	0xFF,r0
+	REST_10GPRS(3, r1)
+	REST_10GPRS(13, r1)
+	REST_8GPRS(23, r1)
+	REST_GPR(31, r1)
+	lwz	r2,_NIP(r1)	/* Restore environment */
+	lwz	r0,_MSR(r1)
+	mtspr	SRR0,r2
+	mtspr	SRR1,r0
+	lwz	r0,GPR0(r1)
+	lwz	r2,GPR2(r1)
+	lwz	r1,GPR1(r1)
+	SYNC
+	rfi
+
+	.globl	dc_read
+dc_read:
+	blr
+
+	.globl get_pvr
+get_pvr:
+	mfspr	r3, PVR
+	blr
+
+/*-----------------------------------------------------------------------*/
+/*
+ * void relocate_code (addr_sp, gd, addr_moni)
+ *
+ * This "function" does not return, instead it continues in RAM
+ * after relocating the monitor code.
+ *
+ * r3 = dest
+ * r4 = src
+ * r5 = length in bytes
+ * r6 = cachelinesize
+ */
+	.globl	relocate_code
+relocate_code:
+	mr	r1,  r3		/* Set new stack pointer		*/
+	mr	r9,  r4		/* Save copy of Global Data pointer	*/
+	mr	r10, r5		/* Save copy of Destination Address	*/
+
+	GET_GOT
+	mr	r3,  r5				/* Destination Address	*/
+	lis	r4, CONFIG_SYS_MONITOR_BASE@h		/* Source      Address	*/
+	ori	r4, r4, CONFIG_SYS_MONITOR_BASE@l
+	lwz	r5, GOT(__init_end)
+	sub	r5, r5, r4
+	li	r6, CONFIG_SYS_CACHELINE_SIZE		/* Cache Line Size	*/
+
+	/*
+	 * Fix GOT pointer:
+	 *
+	 * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
+	 *
+	 * Offset:
+	 */
+	sub	r15, r10, r4
+
+	/* First our own GOT */
+	add	r12, r12, r15
+	/* then the one used by the C code */
+	add	r30, r30, r15
+
+	/*
+	 * Now relocate code
+	 */
+#ifdef CONFIG_ECC
+	bl	board_relocate_rom
+	sync
+	mr	r3, r10				/* Destination Address	*/
+	lis	r4, CONFIG_SYS_MONITOR_BASE@h		/* Source      Address	*/
+	ori	r4, r4, CONFIG_SYS_MONITOR_BASE@l
+	lwz	r5, GOT(__init_end)
+	sub	r5, r5, r4
+	li	r6, CONFIG_SYS_CACHELINE_SIZE		/* Cache Line Size	*/
+#else
+	cmplw	cr1,r3,r4
+	addi	r0,r5,3
+	srwi.	r0,r0,2
+	beq	cr1,4f		/* In place copy is not necessary	*/
+	beq	7f		/* Protect against 0 count		*/
+	mtctr	r0
+	bge	cr1,2f
+
+	la	r8,-4(r4)
+	la	r7,-4(r3)
+1:	lwzu	r0,4(r8)
+	stwu	r0,4(r7)
+	bdnz	1b
+	b	4f
+
+2:	slwi	r0,r0,2
+	add	r8,r4,r0
+	add	r7,r3,r0
+3:	lwzu	r0,-4(r8)
+	stwu	r0,-4(r7)
+	bdnz	3b
+#endif
+/*
+ * Now flush the cache: note that we must start from a cache aligned
+ * address. Otherwise we might miss one cache line.
+ */
+4:	cmpwi	r6,0
+	add	r5,r3,r5
+	beq	7f		/* Always flush prefetch queue in any case */
+	subi	r0,r6,1
+	andc	r3,r3,r0
+	mr	r4,r3
+5:	dcbst	0,r4
+	add	r4,r4,r6
+	cmplw	r4,r5
+	blt	5b
+	sync			/* Wait for all dcbst to complete on bus */
+	mr	r4,r3
+6:	icbi	0,r4
+	add	r4,r4,r6
+	cmplw	r4,r5
+	blt	6b
+7:	sync			/* Wait for all icbi to complete on bus	*/
+	isync
+
+/*
+ * We are done. Do not return, instead branch to second part of board
+ * initialization, now running from RAM.
+ */
+	addi	r0, r10, in_ram - _start + EXC_OFF_SYS_RESET
+	mtlr	r0
+	blr
+
+in_ram:
+#ifdef CONFIG_ECC
+	bl	board_init_ecc
+#endif
+	/*
+	 * Relocation Function, r12 point to got2+0x8000
+	 *
+	 * Adjust got2 pointers, no need to check for 0, this code
+	 * already puts a few entries in the table.
+	 */
+	li	r0,__got2_entries@sectoff@l
+	la	r3,GOT(_GOT2_TABLE_)
+	lwz	r11,GOT(_GOT2_TABLE_)
+	mtctr	r0
+	sub	r11,r3,r11
+	addi	r3,r3,-4
+1:	lwzu	r0,4(r3)
+	cmpwi	r0,0
+	beq-	2f
+	add	r0,r0,r11
+	stw	r0,0(r3)
+2:	bdnz	1b
+
+	/*
+	 * Now adjust the fixups and the pointers to the fixups
+	 * in case we need to move ourselves again.
+	 */
+	li	r0,__fixup_entries@sectoff@l
+	lwz	r3,GOT(_FIXUP_TABLE_)
+	cmpwi	r0,0
+	mtctr	r0
+	addi	r3,r3,-4
+	beq	4f
+3:	lwzu	r4,4(r3)
+	lwzux	r0,r4,r11
+	add	r0,r0,r11
+	stw	r10,0(r3)
+	stw	r0,0(r4)
+	bdnz	3b
+4:
+/* clear_bss: */
+	/*
+	 * Now clear BSS segment
+	 */
+	lwz	r3,GOT(__bss_start)
+	lwz	r4,GOT(_end)
+
+	cmplw	0, r3, r4
+	beq	6f
+
+	li	r0, 0
+5:
+	stw	r0, 0(r3)
+	addi	r3, r3, 4
+	cmplw	0, r3, r4
+	bne	5b
+6:
+	mr	r3, r10		/* Destination Address		*/
+#if defined(CONFIG_AMIGAONEG3SE) || \
+    defined(CONFIG_DB64360)	 || \
+    defined(CONFIG_DB64460)      || \
+    defined(CONFIG_CPCI750)	|| \
+    defined(CONFIG_PPMC7XX)     || \
+    defined(CONFIG_P3Mx)
+	mr	r4, r9		/* Use RAM copy of the global data */
+#endif
+	bl	after_reloc
+
+	/* not reached - end relocate_code */
+/*-----------------------------------------------------------------------*/
+
+	/*
+	 * Copy exception vector code to low memory
+	 *
+	 * r3: dest_addr
+	 * r7: source address, r8: end address, r9: target address
+	 */
+	.globl	trap_init
+trap_init:
+	mflr	r4			/* save link register		*/
+	GET_GOT
+	lwz	r7, GOT(_start)
+	lwz	r8, GOT(_end_of_vectors)
+
+	li	r9, 0x100		/* reset vector always at 0x100 */
+
+	cmplw	0, r7, r8
+	bgelr				/* return if r7>=r8 - just in case */
+1:
+	lwz	r0, 0(r7)
+	stw	r0, 0(r9)
+	addi	r7, r7, 4
+	addi	r9, r9, 4
+	cmplw	0, r7, r8
+	bne	1b
+
+	/*
+	 * relocate `hdlr' and `int_return' entries
+	 */
+	li	r7, .L_MachineCheck - _start + EXC_OFF_SYS_RESET
+	li	r8, Alignment - _start + EXC_OFF_SYS_RESET
+2:
+	bl	trap_reloc
+	addi	r7, r7, 0x100		/* next exception vector	*/
+	cmplw	0, r7, r8
+	blt	2b
+
+	li	r7, .L_Alignment - _start + EXC_OFF_SYS_RESET
+	bl	trap_reloc
+
+	li	r7, .L_ProgramCheck - _start + EXC_OFF_SYS_RESET
+	bl	trap_reloc
+
+	li	r7, .L_FPUnavailable - _start + EXC_OFF_SYS_RESET
+	li	r8, SystemCall - _start + EXC_OFF_SYS_RESET
+3:
+	bl	trap_reloc
+	addi	r7, r7, 0x100		/* next exception vector	*/
+	cmplw	0, r7, r8
+	blt	3b
+
+	li	r7, .L_SingleStep - _start + EXC_OFF_SYS_RESET
+	li	r8, _end_of_vectors - _start + EXC_OFF_SYS_RESET
+4:
+	bl	trap_reloc
+	addi	r7, r7, 0x100		/* next exception vector	*/
+	cmplw	0, r7, r8
+	blt	4b
+
+	/* enable execptions from RAM vectors */
+	mfmsr	r7
+	li	r8,MSR_IP
+	andc	r7,r7,r8
+	mtmsr	r7
+
+	mtlr	r4			/* restore link register	*/
+	blr
+
+#ifdef CONFIG_SYS_INIT_RAM_LOCK
+lock_ram_in_cache:
+	/* Allocate Initial RAM in data cache.
+	 */
+	lis	r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h
+	ori	r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l
+	li	r4, ((CONFIG_SYS_INIT_RAM_END & ~31) + \
+		     (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32
+	mtctr	r4
+1:
+	dcbz	r0, r3
+	addi	r3, r3, 32
+	bdnz	1b
+
+	/* Lock the data cache */
+	mfspr	r0, HID0
+	ori	r0, r0, 0x1000
+	sync
+	mtspr	HID0, r0
+	sync
+	blr
+
+.globl unlock_ram_in_cache
+unlock_ram_in_cache:
+	/* invalidate the INIT_RAM section */
+	lis	r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h
+	ori	r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l
+	li	r4, ((CONFIG_SYS_INIT_RAM_END & ~31) + \
+		     (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32
+	mtctr	r4
+1:	icbi	r0, r3
+	addi	r3, r3, 32
+	bdnz	1b
+	sync			/* Wait for all icbi to complete on bus	*/
+	isync
+
+	/* Unlock the data cache and invalidate it */
+	mfspr   r0, HID0
+	li      r3,0x1000
+	andc    r0,r0,r3
+	li	r3,0x0400
+	or	r0,r0,r3
+	sync
+	mtspr   HID0, r0
+	sync
+	blr
+#endif
diff --git a/arch/powerpc/cpu/74xx_7xx/traps.c b/arch/powerpc/cpu/74xx_7xx/traps.c
new file mode 100644
index 0000000..5073b05
--- /dev/null
+++ b/arch/powerpc/cpu/74xx_7xx/traps.c
@@ -0,0 +1,252 @@
+/*
+ * linux/arch/powerpc/kernel/traps.c
+ *
+ * Copyright (C) 1995-1996  Gary Thomas (gdt@linuxppc.org)
+ *
+ * Modified by Cort Dougan (cort@cs.nmt.edu)
+ * and Paul Mackerras (paulus@cs.anu.edu.au)
+ *
+ * (C) Copyright 2000
+ * 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
+ */
+
+/*
+ * This file handles the architecture-dependent parts of hardware exceptions
+ */
+
+#include <common.h>
+#include <command.h>
+#include <kgdb.h>
+#include <asm/processor.h>
+
+#ifdef CONFIG_AMIGAONEG3SE
+DECLARE_GLOBAL_DATA_PTR;
+#endif
+
+/* Returns 0 if exception not found and fixup otherwise.  */
+extern unsigned long search_exception_table(unsigned long);
+
+/* THIS NEEDS CHANGING to use the board info structure.
+*/
+#ifdef CONFIG_AMIGAONEG3SE
+#define END_OF_MEM (gd->bd->bi_memstart + gd->bd->bi_memsize)
+#else
+#define END_OF_MEM	0x02000000
+#endif
+
+/*
+ * Trap & Exception support
+ */
+
+void
+print_backtrace(unsigned long *sp)
+{
+	int cnt = 0;
+	unsigned long i;
+
+	printf("Call backtrace: ");
+	while (sp) {
+		if ((uint)sp > END_OF_MEM)
+			break;
+
+		i = sp[1];
+		if (cnt++ % 7 == 0)
+			printf("\n");
+		printf("%08lX ", i);
+		if (cnt > 32) break;
+		sp = (unsigned long *)*sp;
+	}
+	printf("\n");
+}
+
+void
+show_regs(struct pt_regs * regs)
+{
+	int i;
+
+	printf("NIP: %08lX XER: %08lX LR: %08lX REGS:"
+	       " %p TRAP: %04lx DAR: %08lX\n",
+	       regs->nip, regs->xer, regs->link, regs, regs->trap, regs->dar);
+	printf("MSR: %08lx EE: %01x PR: %01x FP:"
+	       " %01x ME: %01x IR/DR: %01x%01x\n",
+	       regs->msr, regs->msr&MSR_EE ? 1 : 0, regs->msr&MSR_PR ? 1 : 0,
+	       regs->msr & MSR_FP ? 1 : 0,regs->msr&MSR_ME ? 1 : 0,
+	       regs->msr&MSR_IR ? 1 : 0,
+	       regs->msr&MSR_DR ? 1 : 0);
+
+	printf("\n");
+	for (i = 0;  i < 32;  i++) {
+		if ((i % 8) == 0)
+		{
+			printf("GPR%02d: ", i);
+		}
+
+		printf("%08lX ", regs->gpr[i]);
+		if ((i % 8) == 7)
+		{
+			printf("\n");
+		}
+	}
+}
+
+
+void
+_exception(int signr, struct pt_regs *regs)
+{
+	show_regs(regs);
+	print_backtrace((unsigned long *)regs->gpr[1]);
+	panic("Exception in kernel pc %lx signal %d",regs->nip,signr);
+}
+
+void
+MachineCheckException(struct pt_regs *regs)
+{
+	unsigned long fixup;
+
+	/* Probing PCI using config cycles cause this exception
+	 * when a device is not present.  Catch it and return to
+	 * the PCI exception handler.
+	 */
+	if ((fixup = search_exception_table(regs->nip)) != 0) {
+		regs->nip = fixup;
+		return;
+	}
+
+#if defined(CONFIG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+
+	printf("Machine check in kernel mode.\n");
+	printf("Caused by (from msr): ");
+	printf("regs %p ",regs);
+	switch( regs->msr & 0x000F0000) {
+	case (0x80000000>>12):
+		printf("Machine check signal - probably due to mm fault\n"
+			"with mmu off\n");
+		break;
+	case (0x80000000>>13):
+		printf("Transfer error ack signal\n");
+		break;
+	case (0x80000000>>14):
+		printf("Data parity signal\n");
+		break;
+	case (0x80000000>>15):
+		printf("Address parity signal\n");
+		break;
+	default:
+		printf("Unknown values in msr\n");
+	}
+	show_regs(regs);
+	print_backtrace((unsigned long *)regs->gpr[1]);
+	panic("machine check");
+}
+
+void
+AlignmentException(struct pt_regs *regs)
+{
+#if defined(CONFIG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+	show_regs(regs);
+	print_backtrace((unsigned long *)regs->gpr[1]);
+	panic("Alignment Exception");
+}
+
+void
+ProgramCheckException(struct pt_regs *regs)
+{
+	unsigned char *p = regs ? (unsigned char *)(regs->nip) : NULL;
+	int i, j;
+
+#if defined(CONFIG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+	show_regs(regs);
+
+	p = (unsigned char *) ((unsigned long)p & 0xFFFFFFE0);
+	p -= 32;
+	for (i = 0; i < 256; i+=16) {
+		printf("%08x: ", (unsigned int)p+i);
+		for (j = 0; j < 16; j++) {
+			printf("%02x ", p[i+j]);
+		}
+		printf("\n");
+	}
+
+	print_backtrace((unsigned long *)regs->gpr[1]);
+	panic("Program Check Exception");
+}
+
+void
+SoftEmuException(struct pt_regs *regs)
+{
+#if defined(CONFIG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+	show_regs(regs);
+	print_backtrace((unsigned long *)regs->gpr[1]);
+	panic("Software Emulation Exception");
+}
+
+
+void
+UnknownException(struct pt_regs *regs)
+{
+#if defined(CONFIG_CMD_KGDB)
+	if (debugger_exception_handler && (*debugger_exception_handler)(regs))
+		return;
+#endif
+	printf("Bad trap at PC: %lx, SR: %lx, vector=%lx\n",
+	       regs->nip, regs->msr, regs->trap);
+	_exception(0, regs);
+}
+
+/* Probe an address by reading.  If not present, return -1, otherwise
+ * return 0.
+ */
+int
+addr_probe(uint *addr)
+{
+#if 0
+	int	retval;
+
+	__asm__ __volatile__(			\
+		"1:	lwz %0,0(%1)\n"		\
+		"	eieio\n"		\
+		"	li %0,0\n"		\
+		"2:\n"				\
+		".section .fixup,\"ax\"\n"	\
+		"3:	li %0,-1\n"		\
+		"	b 2b\n"			\
+		".section __ex_table,\"a\"\n"	\
+		"	.align 2\n"		\
+		"	.long 1b,3b\n"		\
+		".text"				\
+		: "=r" (retval) : "r"(addr));
+
+	return (retval);
+#endif
+	return 0;
+}