* Add support for MIPS32 4Kc CPUs

* Add support for INCA-IP Board

10 files changed, 1399 insertions, 0 deletions

diff --git a/cpu/mips/Makefile b/cpu/mips/Makefile
new file mode 100644
index 0000000..91008bf
--- /dev/null
+++ b/cpu/mips/Makefile
@@ -0,0 +1,44 @@
+#
+# (C) Copyright 2003
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= lib$(CPU).a
+
+START	= start.o
+OBJS	= interrupts.o cpu.o incaip_clock.o serial.o
+SOBJS	= incaip_wdt.o cache.o
+
+all:	.depend $(START) $(LIB)
+
+$(LIB):	$(OBJS) $(SOBJS)
+	$(AR) crv $@ $(OBJS) $(SOBJS)
+
+#########################################################################
+
+.depend:	Makefile $(START:.o=.S) $(OBJS:.o=.c)
+		$(CC) -M $(CFLAGS) $(START:.o=.S) $(OBJS:.o=.c) > $@
+
+sinclude .depend
+
+#########################################################################
diff --git a/cpu/mips/cache.S b/cpu/mips/cache.S
new file mode 100644
index 0000000..aeb04b3
--- /dev/null
+++ b/cpu/mips/cache.S
@@ -0,0 +1,265 @@
+/*
+ *  Cache-handling routined for MIPS 4K CPUs
+ *
+ *  Copyright (c) 2003	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 <version.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+#include <asm/addrspace.h>
+#include <asm/cacheops.h>
+
+
+	/* 16KB is the maximum size of instruction and data caches on
+	 * MIPS 4K.
+	 */
+#define MIPS_MAX_CACHE_SIZE	0x4000
+
+
+/*
+ * cacheop macro to automate cache operations
+ * first some helpers...
+ */
+#define _mincache(size, maxsize) \
+   bltu  size,maxsize,9f ; \
+   move  size,maxsize ;    \
+9:
+
+#define _align(minaddr, maxaddr, linesize) \
+   .set noat ; \
+   subu  AT,linesize,1 ;   \
+   not   AT ;        \
+   and   minaddr,AT ;      \
+   addu  maxaddr,-1 ;      \
+   and   maxaddr,AT ;      \
+   .set at
+
+/* general operations */
+#define doop1(op1) \
+   cache op1,0(a0)
+#define doop2(op1, op2) \
+   cache op1,0(a0) ;    \
+   nop ;          \
+   cache op2,0(a0)
+
+/* specials for cache initialisation */
+#define doop1lw(op1) \
+   lw zero,0(a0)
+#define doop1lw1(op1) \
+   cache op1,0(a0) ;    \
+   lw zero,0(a0) ;      \
+   cache op1,0(a0)
+#define doop121(op1,op2) \
+   cache op1,0(a0) ;    \
+   nop;           \
+   cache op2,0(a0) ;    \
+   nop;           \
+   cache op1,0(a0)
+
+#define _oploopn(minaddr, maxaddr, linesize, tag, ops) \
+   .set  noreorder ;    \
+10:   doop##tag##ops ;  \
+   bne     minaddr,maxaddr,10b ; \
+   add      minaddr,linesize ;   \
+   .set  reorder
+
+/* finally the cache operation macros */
+#define vcacheopn(kva, n, cacheSize, cacheLineSize, tag, ops) \
+   blez  n,11f ;        \
+   addu  n,kva ;        \
+   _align(kva, n, cacheLineSize) ; \
+   _oploopn(kva, n, cacheLineSize, tag, ops) ; \
+11:
+
+#define icacheopn(kva, n, cacheSize, cacheLineSize, tag, ops) \
+   _mincache(n, cacheSize);   \
+   blez  n,11f ;        \
+   addu  n,kva ;        \
+   _align(kva, n, cacheLineSize) ; \
+   _oploopn(kva, n, cacheLineSize, tag, ops) ; \
+11:
+
+#define vcacheop(kva, n, cacheSize, cacheLineSize, op) \
+   vcacheopn(kva, n, cacheSize, cacheLineSize, 1, (op))
+
+#define icacheop(kva, n, cacheSize, cacheLineSize, op) \
+   icacheopn(kva, n, cacheSize, cacheLineSize, 1, (op))
+
+/*******************************************************************************
+*
+* mips_cache_reset - low level initialisation of the primary caches
+*
+* This routine initialises the primary caches to ensure that they
+* have good parity.  It must be called by the ROM before any cached locations
+* are used to prevent the possibility of data with bad parity being written to
+* memory.
+* To initialise the instruction cache it is essential that a source of data
+* with good parity is available. This routine
+* will initialise an area of memory starting at location zero to be used as
+* a source of parity.
+*
+* RETURNS: N/A
+*
+*/
+	.globl	mips_cache_reset
+	.ent	mips_cache_reset
+mips_cache_reset:
+
+	li	t2, CFG_ICACHE_SIZE
+	li	t3, CFG_DCACHE_SIZE
+	li	t4, CFG_CACHELINE_SIZE
+	move	t5, t4
+
+
+	li	v0, MIPS_MAX_CACHE_SIZE
+
+	/* Now clear that much memory starting from zero.
+	 */
+
+	li	a0, KSEG1
+	addu	a1, a0, v0
+
+2:	sw	zero, 0(a0)
+	sw	zero, 4(a0)
+	sw	zero, 8(a0)
+	sw	zero, 12(a0)
+	sw	zero, 16(a0)
+	sw	zero, 20(a0)
+	sw	zero, 24(a0)
+	sw	zero, 28(a0)
+	addu	a0, 32
+	bltu	a0, a1, 2b
+   
+	/* Set invalid tag.
+	 */
+
+	mtc0	zero, CP0_TAGLO
+
+   /*
+    * The caches are probably in an indeterminate state,
+    * so we force good parity into them by doing an
+    * invalidate, load/fill, invalidate for each line.
+    */
+
+	/* Assume bottom of RAM will generate good parity for the cache.
+	 */
+
+	li	a0, K0BASE
+	move	a2, t2		# icacheSize
+	move	a3, t4		# icacheLineSize
+	move	a1, a2
+	icacheopn(a0,a1,a2,a3,121,(Index_Store_Tag_I,Fill))
+
+	/* To support Orion/R4600, we initialise the data cache in 3 passes.
+	 */
+
+	/* 1: initialise dcache tags.
+	 */
+
+	li	a0, K0BASE
+	move	a2, t3		# dcacheSize
+	move	a3, t5		# dcacheLineSize
+	move	a1, a2
+	icacheop(a0,a1,a2,a3,Index_Store_Tag_D)
+
+	/* 2: fill dcache.
+	 */
+
+	li	a0, K0BASE
+	move	a2, t3		# dcacheSize
+	move	a3, t5		# dcacheLineSize
+	move	a1, a2
+	icacheopn(a0,a1,a2,a3,1lw,(dummy))
+
+	/* 3: clear dcache tags.
+	 */
+
+	li	a0, K0BASE
+	move	a2, t3		# dcacheSize
+	move	a3, t5		# dcacheLineSize
+	move	a1, a2
+	icacheop(a0,a1,a2,a3,Index_Store_Tag_D)
+
+	j  ra
+	.end  mips_cache_reset
+
+
+/*******************************************************************************
+*
+* dcache_status - get cache status
+*
+* RETURNS: 0 - cache disabled; 1 - cache enabled
+*
+*/
+	.globl	dcache_status
+	.ent	dcache_status
+dcache_status:
+
+	mfc0	v0, CP0_CONFIG
+	andi	v0, v0, 1
+	j	ra
+
+	.end  dcache_status
+
+/*******************************************************************************
+*
+* dcache_disable - disable cache
+*
+* RETURNS: N/A
+*
+*/
+	.globl	dcache_disable
+	.ent	dcache_disable
+dcache_disable:
+
+	mfc0	t0, CP0_CONFIG
+	li	t1, -8
+	and	t0, t0, t1
+	ori	t0, t0, CONF_CM_UNCACHED
+	mtc0    t0, CP0_CONFIG
+	j	ra
+
+	.end  dcache_disable
+
+
+/*******************************************************************************
+*
+* mips_cache_lock - lock RAM area pointed to by a0 in cache.
+*
+* RETURNS: N/A
+*
+*/
+	.globl	mips_cache_lock
+	.ent	mips_cache_lock
+mips_cache_lock:
+	li	a1, K0BASE - CFG_DCACHE_SIZE
+	addu	a0, a1
+	li	a2, CFG_DCACHE_SIZE
+	li	a3, CFG_CACHELINE_SIZE
+	move	a1, a2
+	icacheop(a0,a1,a2,a3,0x1d)
+
+	j	ra
+	.end	mips_cache_lock
+
diff --git a/cpu/mips/config.mk b/cpu/mips/config.mk
new file mode 100644
index 0000000..4ea6617
--- /dev/null
+++ b/cpu/mips/config.mk
@@ -0,0 +1,25 @@
+#
+# (C) Copyright 2003
+# Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+PLATFORM_CPPFLAGS += -mcpu=4kc -EB -mabicalls
+
diff --git a/cpu/mips/cpu.c b/cpu/mips/cpu.c
new file mode 100644
index 0000000..3fc3916
--- /dev/null
+++ b/cpu/mips/cpu.c
@@ -0,0 +1,41 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/inca-ip.h>
+
+int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+#ifdef CONFIG_INCA_IP
+	*INCA_IP_WDT_RST_REQ = 0x3f;
+#endif
+	fprintf(stderr, "*** reset failed ***\n");
+	return 0;
+}
+
+void flush_cache (ulong start_addr, ulong size)
+{
+
+}
+
diff --git a/cpu/mips/incaip_clock.c b/cpu/mips/incaip_clock.c
new file mode 100644
index 0000000..7fc6eb0
--- /dev/null
+++ b/cpu/mips/incaip_clock.c
@@ -0,0 +1,107 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/inca-ip.h>
+
+
+
+/*******************************************************************************
+*
+* get_cpuclk - returns the frequency of the CPU. 
+*
+* Gets the value directly from the INCA-IP hardware.
+*
+* RETURNS: 
+*          150.000.000 for 150 MHz
+*          130.000.000. for 130 Mhz
+*          100.000.000. for 100 Mhz
+* NOTE:
+*   This functions should be used by the hardware driver to get the correct
+*   frequency of the CPU. Don't use the macros, which are set to init the CPU
+*   frequency in the ROM code.
+*/
+uint incaip_get_cpuclk(void)
+{
+   /*-------------------------------------------------------------------------*/
+   /* CPU Clock Input Multiplexer (MUX I)                                     */
+   /* Multiplexer MUX I selects the maximum input clock to the CPU.           */
+   /*-------------------------------------------------------------------------*/
+   if (*((volatile ulong*)INCA_IP_CGU_CGU_MUXCR) & INCA_IP_CGU_CGU_MUXCR_MUXI)
+   {
+      /* MUX I set to 150 MHz clock */
+      return 150000000;
+   }
+   else
+   {
+      /* MUX I set to 100/133 MHz clock */
+      if (*((volatile ulong*)INCA_IP_CGU_CGU_DIVCR) & 0x40) 
+      {
+         /* Division value is 1/3, maximum CPU operating */
+         /* frequency is 133.3 MHz                       */
+         return 130000000;
+      }
+      else
+      {
+         /* Division value is 1/4, maximum CPU operating */
+         /* frequency is 100 MHz                         */
+         return 100000000;
+      }
+   }
+}
+
+/*******************************************************************************
+*
+* get_fpiclk - returns the frequency of the FPI bus. 
+*
+* Gets the value directly from the INCA-IP hardware.
+*
+* RETURNS: Frquency in Hz
+*
+* NOTE:
+*   This functions should be used by the hardware driver to get the correct
+*   frequency of the CPU. Don't use the macros, which are set to init the CPU
+*   frequency in the ROM code.
+*   The calculation for the 
+*/
+uint incaip_get_fpiclk(void)
+{
+   uint  clkCPU;
+   
+   clkCPU = incaip_get_cpuclk();
+   
+   switch (*((volatile ulong*)INCA_IP_CGU_CGU_DIVCR) & 0xC)
+   {
+      case 0x4:
+         return clkCPU >> 1; /* devided by 2 */
+         break;
+      case 0x8:
+         return clkCPU >> 2; /* devided by 4 */
+         break;
+      default:
+         return clkCPU;
+         break;
+   }
+}
+
+
diff --git a/cpu/mips/incaip_wdt.S b/cpu/mips/incaip_wdt.S
new file mode 100644
index 0000000..9455569
--- /dev/null
+++ b/cpu/mips/incaip_wdt.S
@@ -0,0 +1,73 @@
+/*
+ *  INCA-IP Watchdog timer management code.
+ *
+ *  Copyright (c) 2003	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 <version.h>
+#include <asm/regdef.h>
+
+
+#define WD_BASE            0xb8000000
+#define WD_CON0(value)     0x0020(value)
+#define WD_CON1(value)     0x0024(value)
+#define WD_DISABLE         0x00000008
+#define WD_ENABLE          0x00000000
+#define WD_WRITE_PW        0xFFFC00F8
+#define WD_WRITE_ENDINIT   0xFFFC00F3
+#define WD_WRITE_INIT      0xFFFC00F2
+
+
+	.globl	disable_incaip_wdt
+disable_incaip_wdt:
+	li	t0, WD_BASE
+
+	/* Calculate password.
+	 */
+	lw	t2, WD_CON1(t0)
+	and	t2, 0xC
+
+	lw	t3, WD_CON0(t0)
+	and	t3, 0xFFFFFF01
+
+	or	t3, t2
+	or 	t3, 0xF0
+
+	sw	t3, WD_CON0(t0)		/* write password */
+
+	/* Clear ENDINIT.
+	 */
+	li	t1, WD_WRITE_INIT
+	sw	t1, WD_CON0(t0)
+
+
+	li	t1, WD_DISABLE
+	sw	t1, WD_CON1(t0)		/* disable watchdog */
+	li	t1, WD_WRITE_PW
+	sw	t1, WD_CON0(t0)		/* write password */
+	li	t1, WD_WRITE_ENDINIT
+	sw	t1, WD_CON0(t0)		/* end command */
+
+	j	ra
+	nop
+
diff --git a/cpu/mips/interrupts.c b/cpu/mips/interrupts.c
new file mode 100644
index 0000000..0490a76
--- /dev/null
+++ b/cpu/mips/interrupts.c
@@ -0,0 +1,34 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+void enable_interrupts(void)
+{
+}
+
+int disable_interrupts(void)
+{
+	return 0;
+}
+
diff --git a/cpu/mips/serial.c b/cpu/mips/serial.c
new file mode 100644
index 0000000..ebda509
--- /dev/null
+++ b/cpu/mips/serial.c
@@ -0,0 +1,282 @@
+/*
+ * (INCA) ASC UART support
+ */
+
+#include <common.h>
+#include <asm/inca-ip.h>
+#include "serial.h"
+
+#define SET_BIT(reg, mask)                  reg |= (mask)
+#define CLEAR_BIT(reg, mask)                reg &= (~mask)
+#define CLEAR_BITS(reg, mask)               CLEAR_BIT(reg, mask)
+#define SET_BITS(reg, mask)                 SET_BIT(reg, mask)
+#define SET_BITFIELD(reg, mask, off, val)   {reg &= (~mask); reg |= (val << off);}
+
+extern uint incaip_get_fpiclk(void);
+
+static int serial_setopt (void);
+
+/* pointer to ASC register base address */
+static volatile incaAsc_t *pAsc = (incaAsc_t *)INCA_IP_ASC;
+
+/******************************************************************************
+*
+* serial_init - initialize a INCAASC channel
+*
+* This routine initializes the number of data bits, parity
+* and set the selected baud rate. Interrupts are disabled.
+* Set the modem control signals if the option is selected.
+*
+* RETURNS: N/A
+*/
+
+int serial_init (void)
+{
+    /* we have to set PMU.EN13 bit to enable an ASC device*/
+    INCAASC_PMU_ENABLE(13);
+    
+    /* and we have to set CLC register*/
+    CLEAR_BIT(pAsc->asc_clc, ASCCLC_DISS);
+    SET_BITFIELD(pAsc->asc_clc, ASCCLC_RMCMASK, ASCCLC_RMCOFFSET, 0x0001);
+    
+    /* initialy we are in async mode */
+    pAsc->asc_con = ASCCON_M_8ASYNC;
+
+    /* select input port */
+    pAsc->asc_pisel = (CONSOLE_TTY & 0x1);
+
+    /* TXFIFO's filling level */
+    SET_BITFIELD(pAsc->asc_txfcon, ASCTXFCON_TXFITLMASK,
+                    ASCTXFCON_TXFITLOFF, INCAASC_TXFIFO_FL);
+    /* enable TXFIFO */
+    SET_BIT(pAsc->asc_txfcon, ASCTXFCON_TXFEN);
+
+    /* RXFIFO's filling level */
+    SET_BITFIELD(pAsc->asc_txfcon, ASCRXFCON_RXFITLMASK, 
+                    ASCRXFCON_RXFITLOFF, INCAASC_RXFIFO_FL);
+    /* enable RXFIFO */
+    SET_BIT(pAsc->asc_rxfcon, ASCRXFCON_RXFEN);
+
+    /* enable error signals */
+    SET_BIT(pAsc->asc_con, ASCCON_FEN);
+    SET_BIT(pAsc->asc_con, ASCCON_OEN);
+
+    /* acknowledge ASC interrupts */
+    ASC_INTERRUPTS_CLEAR(INCAASC_IRQ_LINE_ALL);
+
+    /* disable ASC interrupts */
+    ASC_INTERRUPTS_DISABLE(INCAASC_IRQ_LINE_ALL);
+
+    /* set FIFOs into the transparent mode */
+    SET_BIT(pAsc->asc_txfcon, ASCTXFCON_TXTMEN);
+    SET_BIT(pAsc->asc_rxfcon, ASCRXFCON_RXTMEN);
+
+    /* set baud rate */
+    serial_setbrg();
+
+    /* set the options */
+    serial_setopt();
+    
+    return 0;
+}
+
+void serial_setbrg (void)
+{
+    ulong      uiReloadValue, fdv;
+    ulong      f_ASC;
+
+    f_ASC = incaip_get_fpiclk();
+
+#ifndef INCAASC_USE_FDV
+    fdv = 2;
+    uiReloadValue = (f_ASC / (fdv * 16 * CONFIG_BAUDRATE)) - 1;
+#else 
+    fdv = INCAASC_FDV_HIGH_BAUDRATE;
+    uiReloadValue = (f_ASC / (8192 * CONFIG_BAUDRATE / fdv)) - 1;
+#endif /* INCAASC_USE_FDV */
+    
+    if ( (uiReloadValue < 0) || (uiReloadValue > 8191) )
+    {
+#ifndef INCAASC_USE_FDV
+        fdv = 3;
+        uiReloadValue = (f_ASC / (fdv * 16 * CONFIG_BAUDRATE)) - 1;
+#else 
+        fdv = INCAASC_FDV_LOW_BAUDRATE;
+        uiReloadValue = (f_ASC / (8192 * CONFIG_BAUDRATE / fdv)) - 1;
+#endif /* INCAASC_USE_FDV */
+        
+        if ( (uiReloadValue < 0) || (uiReloadValue > 8191) )
+        {
+            return;    /* can't impossibly generate that baud rate */
+        }
+    }
+
+    /* Disable Baud Rate Generator; BG should only be written when R=0 */
+    CLEAR_BIT(pAsc->asc_con, ASCCON_R);
+
+#ifndef INCAASC_USE_FDV
+    /*
+     * Disable Fractional Divider (FDE)
+     * Divide clock by reload-value + constant (BRS)
+     */
+    /* FDE = 0 */
+    CLEAR_BIT(pAsc->asc_con, ASCCON_FDE);
+
+    if ( fdv == 2 )
+        CLEAR_BIT(pAsc->asc_con, ASCCON_BRS);   /* BRS = 0 */
+    else
+        SET_BIT(pAsc->asc_con, ASCCON_BRS); /* BRS = 1 */
+
+#else /* INCAASC_USE_FDV */
+
+    /* Enable Fractional Divider */
+    SET_BIT(pAsc->asc_con, ASCCON_FDE); /* FDE = 1 */
+
+    /* Set fractional divider value */
+    pAsc->asc_fdv = fdv & ASCFDV_VALUE_MASK;
+
+#endif /* INCAASC_USE_FDV */
+
+    /* Set reload value in BG */
+    pAsc->asc_bg = uiReloadValue;
+
+    /* Enable Baud Rate Generator */
+    SET_BIT(pAsc->asc_con, ASCCON_R);           /* R = 1 */
+}
+
+/*******************************************************************************
+*
+* serial_setopt - set the serial options
+*
+* Set the channel operating mode to that specified. Following options
+* are supported: CREAD, CSIZE, PARENB, and PARODD.
+*
+* Note, this routine disables the transmitter.  The calling routine
+* may have to re-enable it.
+*
+* RETURNS:
+* Returns 0 to indicate success, otherwise -1 is returned
+*/
+
+static int serial_setopt (void)
+{
+    ulong  con;
+
+    switch ( ASC_OPTIONS & ASCOPT_CSIZE )
+    {
+    /* 7-bit-data */
+    case ASCOPT_CS7:
+        con = ASCCON_M_7ASYNCPAR;   /* 7-bit-data and parity bit */
+        break;
+
+    /* 8-bit-data */
+    case ASCOPT_CS8:
+        if ( ASC_OPTIONS & ASCOPT_PARENB )
+            con = ASCCON_M_8ASYNCPAR;   /* 8-bit-data and parity bit */
+        else
+            con = ASCCON_M_8ASYNC;      /* 8-bit-data no parity */
+        break;
+    
+    /* 
+     *  only 7 and 8-bit frames are supported
+     *  if we don't use IOCTL extensions 
+     */
+    default:
+        return -1;
+    }
+
+    if ( ASC_OPTIONS & ASCOPT_STOPB )
+        SET_BIT(con, ASCCON_STP);       /* 2 stop bits */
+    else
+        CLEAR_BIT(con, ASCCON_STP);     /* 1 stop bit */
+
+    if ( ASC_OPTIONS & ASCOPT_PARENB )
+        SET_BIT(con, ASCCON_PEN);           /* enable parity checking */    
+    else
+        CLEAR_BIT(con, ASCCON_PEN);         /* disable parity checking */
+    
+    if ( ASC_OPTIONS & ASCOPT_PARODD )
+        SET_BIT(con, ASCCON_ODD);       /* odd parity */
+    else
+        CLEAR_BIT(con, ASCCON_ODD);     /* even parity */
+
+    if ( ASC_OPTIONS & ASCOPT_CREAD )
+        SET_BIT(pAsc->asc_whbcon, ASCWHBCON_SETREN); /* Receiver enable */
+
+    pAsc->asc_con |= con;
+
+    return 0;
+}
+
+void serial_putc (const char c)
+{
+    uint txFl = 0;
+
+    if (c == '\n') serial_putc ('\r');
+
+    /* check do we have a free space in the TX FIFO */
+    /* get current filling level */
+    do
+    {
+	txFl = ( pAsc->asc_fstat & ASCFSTAT_TXFFLMASK ) >> ASCFSTAT_TXFFLOFF;
+    }
+    while ( txFl == INCAASC_TXFIFO_FULL );
+
+    pAsc->asc_tbuf = c; /* write char to Transmit Buffer Register */
+    /* check for errors */
+    if ( pAsc->asc_con & ASCCON_OE )
+    {
+        SET_BIT(pAsc->asc_whbcon, ASCWHBCON_CLROE);
+        return;
+    }
+}
+
+void serial_puts (const char *s)
+{
+    while (*s)
+    {
+	serial_putc (*s++);
+    }
+}
+
+int serial_getc (void)
+{
+    ulong symbol_mask;
+    char c;
+
+    while (!serial_tstc());
+
+    symbol_mask =
+	((ASC_OPTIONS & ASCOPT_CSIZE) == ASCOPT_CS7) ? (0x7f) : (0xff);
+    
+    c = (char)(pAsc->asc_rbuf & symbol_mask);
+
+    return c;
+}
+
+int serial_tstc (void)
+{
+    int res = 1;
+
+    if ( (pAsc->asc_fstat & ASCFSTAT_RXFFLMASK) == 0 )
+    {
+        res = 0;
+    }
+    else if ( pAsc->asc_con & ASCCON_FE )
+    {
+        SET_BIT(pAsc->asc_whbcon, ASCWHBCON_CLRFE);
+        res = 0;
+    }
+    else if ( pAsc->asc_con & ASCCON_PE )
+    {
+        SET_BIT(pAsc->asc_whbcon, ASCWHBCON_CLRPE);
+        res = 0;
+    }
+    else if ( pAsc->asc_con & ASCCON_OE )
+    {
+        SET_BIT(pAsc->asc_whbcon, ASCWHBCON_CLROE);
+        res = 0;
+    }
+
+    return res;
+}
diff --git a/cpu/mips/serial.h b/cpu/mips/serial.h
new file mode 100644
index 0000000..ee63360
--- /dev/null
+++ b/cpu/mips/serial.h
@@ -0,0 +1,178 @@
+/* incaAscSio.h - (INCA) ASC UART tty driver header */
+
+#ifndef __INCincaAscSioh
+#define __INCincaAscSioh
+
+#include <asm/inca-ip.h>
+
+/* channel operating modes */
+#define	ASCOPT_CSIZE	0x00000003
+#define	ASCOPT_CS7	0x00000001
+#define	ASCOPT_CS8	0x00000002
+#define	ASCOPT_PARENB	0x00000004
+#define	ASCOPT_STOPB	0x00000008
+#define	ASCOPT_PARODD	0x00000010
+#define	ASCOPT_CREAD	0x00000020
+
+#define ASC_OPTIONS		(ASCOPT_CREAD | ASCOPT_CS8)
+
+/* ASC input select (0 or 1) */
+#define CONSOLE_TTY	0
+
+/* use fractional divider for baudrate settings */
+#define INCAASC_USE_FDV
+
+#ifdef INCAASC_USE_FDV
+   #define INCAASC_FDV_LOW_BAUDRATE        71
+   #define INCAASC_FDV_HIGH_BAUDRATE       453   
+#endif /*INCAASC_USE_FDV*/
+
+
+#define INCAASC_TXFIFO_FL       1
+#define INCAASC_RXFIFO_FL       1
+#define INCAASC_TXFIFO_FULL     16
+
+/* interrupt lines masks for the ASC device interrupts*/
+/* change these macroses if it's necessary */
+#define INCAASC_IRQ_LINE_ALL        0x000F0000  /* all IRQs */
+
+#define INCAASC_IRQ_LINE_TIR            0x00010000      /* TIR - Tx */
+#define INCAASC_IRQ_LINE_RIR            0x00020000      /* RIR - Rx */
+#define INCAASC_IRQ_LINE_EIR            0x00040000      /* EIR - Err */
+#define INCAASC_IRQ_LINE_TBIR           0x00080000      /* TBIR - Tx Buf*/
+
+/* interrupt controller access macros */    
+#define ASC_INTERRUPTS_ENABLE(X)  \
+   *((volatile unsigned int*) INCA_IP_ICU_IM2_IER) |= X;
+#define ASC_INTERRUPTS_DISABLE(X) \
+   *((volatile unsigned int*) INCA_IP_ICU_IM2_IER) &= ~X;
+#define ASC_INTERRUPTS_CLEAR(X)   \
+   *((volatile unsigned int*) INCA_IP_ICU_IM2_ISR) = X;
+
+/* CLC register's bits and bitfields */
+#define ASCCLC_DISR        0x00000001
+#define ASCCLC_DISS        0x00000002
+#define ASCCLC_RMCMASK     0x0000FF00
+#define ASCCLC_RMCOFFSET   8
+
+/* CON register's bits and bitfields */
+#define ASCCON_MODEMASK 0x0007
+    #define ASCCON_M_8SYNC          0x0
+    #define ASCCON_M_8ASYNC         0x1
+    #define ASCCON_M_8IRDAASYNC     0x2
+    #define ASCCON_M_7ASYNCPAR      0x3
+    #define ASCCON_M_9ASYNC         0x4
+    #define ASCCON_M_8WAKEUPASYNC   0x5
+    #define ASCCON_M_8ASYNCPAR      0x7
+#define ASCCON_STP      0x0008
+#define ASCCON_REN      0x0010
+#define ASCCON_PEN      0x0020
+#define ASCCON_FEN      0x0040
+#define ASCCON_OEN      0x0080
+#define ASCCON_PE       0x0100
+#define ASCCON_FE       0x0200
+#define ASCCON_OE       0x0400
+#define ASCCON_FDE      0x0800
+#define ASCCON_ODD      0x1000
+#define ASCCON_BRS      0x2000
+#define ASCCON_LB       0x4000
+#define ASCCON_R        0x8000
+
+/* WHBCON register's bits and bitfields */
+#define ASCWHBCON_CLRREN    0x0010
+#define ASCWHBCON_SETREN    0x0020
+#define ASCWHBCON_CLRPE     0x0100
+#define ASCWHBCON_CLRFE     0x0200
+#define ASCWHBCON_CLROE     0x0400
+#define ASCWHBCON_SETPE     0x0800
+#define ASCWHBCON_SETFE     0x1000
+#define ASCWHBCON_SETOE     0x2000
+
+/* ABCON register's bits and bitfields */
+#define ASCABCON_ABEN       0x0001
+#define ASCABCON_AUREN      0x0002
+#define ASCABCON_ABSTEN     0x0004
+#define ASCABCON_ABDETEN    0x0008
+#define ASCABCON_FCDETEN    0x0010
+#define ASCABCON_EMMASK     0x0300
+    #define ASCABCON_EMOFF          8
+        #define ASCABCON_EM_DISAB       0x0
+        #define ASCABCON_EM_DURAB       0x1
+        #define ASCABCON_EM_ALWAYS      0x2
+#define ASCABCON_TXINV      0x0400
+#define ASCABCON_RXINV      0x0800
+
+/* FDV register mask, offset and bitfields*/
+#define ASCFDV_VALUE_MASK     0x000001FF
+
+/* WHBABCON register's bits and bitfields */
+#define ASCWHBABCON_SETABEN     0x0001
+#define ASCWHBABCON_CLRABEN     0x0002
+
+/* ABSTAT register's bits and bitfields */
+#define ASCABSTAT_FCSDET    0x0001
+#define ASCABSTAT_FCCDET    0x0002
+#define ASCABSTAT_SCSDET    0x0004
+#define ASCABSTAT_SCCDET    0x0008
+#define ASCABSTAT_DETWAIT   0x0010
+
+/* WHBABSTAT register's bits and bitfields */
+#define ASCWHBABSTAT_CLRFCSDET  0x0001
+#define ASCWHBABSTAT_SETFCSDET  0x0002
+#define ASCWHBABSTAT_CLRFCCDET  0x0004
+#define ASCWHBABSTAT_SETFCCDET  0x0008
+#define ASCWHBABSTAT_CLRSCSDET  0x0010
+#define ASCWHBABSTAT_SETSCSDET  0x0020
+#define ASCWHBABSTAT_SETSCCDET  0x0040
+#define ASCWHBABSTAT_CLRSCCDET  0x0080
+#define ASCWHBABSTAT_CLRDETWAIT 0x0100
+#define ASCWHBABSTAT_SETDETWAIT 0x0200
+
+/* TXFCON register's bits and bitfields */
+#define ASCTXFCON_TXFEN         0x0001
+#define ASCTXFCON_TXFFLU        0x0002
+#define ASCTXFCON_TXTMEN        0x0004
+#define ASCTXFCON_TXFITLMASK    0x3F00
+#define ASCTXFCON_TXFITLOFF     8
+
+/* RXFCON register's bits and bitfields */
+#define ASCRXFCON_RXFEN         0x0001
+#define ASCRXFCON_RXFFLU        0x0002
+#define ASCRXFCON_RXTMEN        0x0004
+#define ASCRXFCON_RXFITLMASK    0x3F00
+#define ASCRXFCON_RXFITLOFF     8
+
+/* FSTAT register's bits and bitfields */
+#define ASCFSTAT_RXFFLMASK      0x003F
+#define ASCFSTAT_TXFFLMASK      0x3F00
+#define ASCFSTAT_TXFFLOFF       8
+
+#define INCAASC_PMU_ENABLE(BIT) *((volatile ulong*)0xBF102000) |= (0x1 << BIT);
+
+typedef  struct         /* incaAsc_t */
+{
+    volatile unsigned long  asc_clc;                            /*0x0000*/
+    volatile unsigned long  asc_pisel;                          /*0x0004*/
+    volatile unsigned long  asc_rsvd1[2];   /* for mapping */   /*0x0008*/
+    volatile unsigned long  asc_con;                            /*0x0010*/
+    volatile unsigned long  asc_bg;                             /*0x0014*/
+    volatile unsigned long  asc_fdv;                            /*0x0018*/
+    volatile unsigned long  asc_pmw;        /* not used */      /*0x001C*/
+    volatile unsigned long  asc_tbuf;                           /*0x0020*/
+    volatile unsigned long  asc_rbuf;                           /*0x0024*/
+    volatile unsigned long  asc_rsvd2[2];   /* for mapping */   /*0x0028*/
+    volatile unsigned long  asc_abcon;                          /*0x0030*/
+    volatile unsigned long  asc_abstat;     /* not used */      /*0x0034*/
+    volatile unsigned long  asc_rsvd3[2];   /* for mapping */   /*0x0038*/
+    volatile unsigned long  asc_rxfcon;                         /*0x0040*/
+    volatile unsigned long  asc_txfcon;                         /*0x0044*/
+    volatile unsigned long  asc_fstat;                          /*0x0048*/
+    volatile unsigned long  asc_rsvd4;      /* for mapping */   /*0x004C*/
+    volatile unsigned long  asc_whbcon;                         /*0x0050*/
+    volatile unsigned long  asc_whbabcon;                       /*0x0054*/
+    volatile unsigned long  asc_whbabstat;  /* not used */      /*0x0058*/
+
+} incaAsc_t;
+
+#endif /* __INCincaAscSioh */
+
diff --git a/cpu/mips/start.S b/cpu/mips/start.S
new file mode 100644
index 0000000..bf11655
--- /dev/null
+++ b/cpu/mips/start.S
@@ -0,0 +1,350 @@
+/*
+ *  Startup Code for MIPS32 CPU-core
+ *
+ *  Copyright (c) 2003	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 <version.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+
+
+#define RVECENT(f,n) \
+   b f; nop
+#define XVECENT(f,bev) \
+   b f     ;           \
+   li k0,bev
+
+	.set noreorder
+
+	.globl _start
+	.text
+_start:
+	RVECENT(reset,0)	/* U-boot entry point */
+	RVECENT(reset,1)	/* software reboot */
+#ifdef CONFIG_INCA_IP
+	.word 0x000020C4	/* EBU init code, fetched during booting */
+	.word 0x00000000        /* phase of the flash                    */
+#else
+	RVECENT(romReserved,2)
+#endif
+	RVECENT(romReserved,3)
+	RVECENT(romReserved,4)
+	RVECENT(romReserved,5)
+	RVECENT(romReserved,6)
+	RVECENT(romReserved,7)
+	RVECENT(romReserved,8)
+	RVECENT(romReserved,9)
+	RVECENT(romReserved,10)
+	RVECENT(romReserved,11)
+	RVECENT(romReserved,12)
+	RVECENT(romReserved,13)
+	RVECENT(romReserved,14)
+	RVECENT(romReserved,15)
+	RVECENT(romReserved,16)
+	RVECENT(romReserved,17) 
+	RVECENT(romReserved,18)
+	RVECENT(romReserved,19)
+	RVECENT(romReserved,20)
+	RVECENT(romReserved,21)
+	RVECENT(romReserved,22)
+	RVECENT(romReserved,23)
+	RVECENT(romReserved,24)
+	RVECENT(romReserved,25)
+	RVECENT(romReserved,26)
+	RVECENT(romReserved,27)
+	RVECENT(romReserved,28)
+	RVECENT(romReserved,29)
+	RVECENT(romReserved,30)
+	RVECENT(romReserved,31)
+	RVECENT(romReserved,32)
+	RVECENT(romReserved,33)
+	RVECENT(romReserved,34)
+	RVECENT(romReserved,35)
+	RVECENT(romReserved,36)
+	RVECENT(romReserved,37)
+	RVECENT(romReserved,38)
+	RVECENT(romReserved,39)
+	RVECENT(romReserved,40)
+	RVECENT(romReserved,41)
+	RVECENT(romReserved,42)
+	RVECENT(romReserved,43)
+	RVECENT(romReserved,44)
+	RVECENT(romReserved,45)
+	RVECENT(romReserved,46)
+	RVECENT(romReserved,47)
+	RVECENT(romReserved,48)
+	RVECENT(romReserved,49)
+	RVECENT(romReserved,50)
+	RVECENT(romReserved,51)
+	RVECENT(romReserved,52)
+	RVECENT(romReserved,53)
+	RVECENT(romReserved,54)
+	RVECENT(romReserved,55)
+	RVECENT(romReserved,56)
+	RVECENT(romReserved,57)
+	RVECENT(romReserved,58)
+	RVECENT(romReserved,59)
+	RVECENT(romReserved,60)
+	RVECENT(romReserved,61)
+	RVECENT(romReserved,62)
+	RVECENT(romReserved,63) 
+	XVECENT(romExcHandle,0x200)	/* bfc00200: R4000 tlbmiss vector */
+	RVECENT(romReserved,65)
+	RVECENT(romReserved,66)
+	RVECENT(romReserved,67)
+	RVECENT(romReserved,68)
+	RVECENT(romReserved,69)
+	RVECENT(romReserved,70)
+	RVECENT(romReserved,71)
+	RVECENT(romReserved,72)
+	RVECENT(romReserved,73)
+	RVECENT(romReserved,74)
+	RVECENT(romReserved,75)
+	RVECENT(romReserved,76)
+	RVECENT(romReserved,77)
+	RVECENT(romReserved,78)
+	RVECENT(romReserved,79) 
+	XVECENT(romExcHandle,0x280)	/* bfc00280: R4000 xtlbmiss vector */
+	RVECENT(romReserved,81)
+	RVECENT(romReserved,82)
+	RVECENT(romReserved,83)
+	RVECENT(romReserved,84)
+	RVECENT(romReserved,85)
+	RVECENT(romReserved,86)
+	RVECENT(romReserved,87)
+	RVECENT(romReserved,88)
+	RVECENT(romReserved,89)
+	RVECENT(romReserved,90)
+	RVECENT(romReserved,91)
+	RVECENT(romReserved,92)
+	RVECENT(romReserved,93)
+	RVECENT(romReserved,94)
+	RVECENT(romReserved,95) 
+	XVECENT(romExcHandle,0x300)	/* bfc00300: R4000 cache vector */
+	RVECENT(romReserved,97)
+	RVECENT(romReserved,98)
+	RVECENT(romReserved,99)
+	RVECENT(romReserved,100)
+	RVECENT(romReserved,101)
+	RVECENT(romReserved,102)
+	RVECENT(romReserved,103)
+	RVECENT(romReserved,104)
+	RVECENT(romReserved,105)
+	RVECENT(romReserved,106)
+	RVECENT(romReserved,107)
+	RVECENT(romReserved,108)
+	RVECENT(romReserved,109)
+	RVECENT(romReserved,110)
+	RVECENT(romReserved,111)
+	XVECENT(romExcHandle,0x380)	/* bfc00380: R4000 general vector */
+	RVECENT(romReserved,113)
+	RVECENT(romReserved,114)
+	RVECENT(romReserved,115)
+	RVECENT(romReserved,116)
+	RVECENT(romReserved,116)
+	RVECENT(romReserved,118)
+	RVECENT(romReserved,119)
+	RVECENT(romReserved,120)
+	RVECENT(romReserved,121)
+	RVECENT(romReserved,122)
+	RVECENT(romReserved,123)
+	RVECENT(romReserved,124)
+	RVECENT(romReserved,125)
+	RVECENT(romReserved,126)
+	RVECENT(romReserved,127)
+   
+	/* We hope there are no more reserved vectors!
+	 * 128 * 8 == 1024 == 0x400
+	 * so this is address R_VEC+0x400 == 0xbfc00400
+	 */
+	.align 4
+reset:
+
+	/* Clear watch registers.
+	 */
+	mtc0	zero, CP0_WATCHLO
+	mtc0	zero, CP0_WATCHHI
+
+	/* STATUS register */
+	mfc0	k0, CP0_STATUS
+	li	k1, ~ST0_IE
+	and	k0, k1
+	mtc0	k0, CP0_STATUS
+
+	/* CAUSE register */
+	mtc0	zero, CP0_CAUSE
+
+	/* Init Timer */
+	mtc0	zero, CP0_COUNT
+	mtc0	zero, CP0_COMPARE
+
+	/* CONFIG0 register */
+	li	t0, CONF_CM_UNCACHED
+	mtc0	t0, CP0_CONFIG
+
+#ifdef CONFIG_INCA_IP
+	/* Disable INCA-IP Watchdog.
+	 */
+	bal	disable_incaip_wdt
+	nop
+#endif
+
+	/* Initialize any external memory. 
+	 */
+	bal	memsetup
+	nop
+
+	/* Initialize caches...
+	 */
+	bal	mips_cache_reset
+	nop
+
+	/* ... and enable them.
+	 */
+	li	t0, CONF_CM_CACHABLE_NONCOHERENT
+	mtc0	t0, CP0_CONFIG
+
+
+	/* Set up temporary stack.
+	 */
+	li	a0, CFG_INIT_SP_OFFSET
+	bal	mips_cache_lock
+	nop
+
+	li	t0, CFG_SDRAM_BASE + CFG_INIT_SP_OFFSET
+	la	sp, 0(t0)
+
+	/* Initialize GOT pointer.
+	 */
+	bal	1f
+	nop
+	.word	_GLOBAL_OFFSET_TABLE_ - 1f + 4
+1:
+	move	gp, ra
+	lw	t1, 0(ra)
+	add	gp, t1
+	la	t9, board_init_f
+	j	t9
+	nop
+
+
+/*
+ * void relocate_code (addr_sp, gd, addr_moni)
+ *
+ * This "function" does not return, instead it continues in RAM
+ * after relocating the monitor code.
+ *
+ * a0 = addr_sp
+ * a1 = gd
+ * a2 = destination address
+ */
+	.globl	relocate_code
+	.ent	relocate_code
+relocate_code:
+	move	sp, a0		/* Set new stack pointer		*/
+
+	/*
+	 * Fix GOT pointer:
+	 *
+	 * New GOT-PTR = (old GOT-PTR - CFG_MONITOR_BASE) + Destination Address
+	 */
+	move	t6, gp
+	sub	gp, CFG_MONITOR_BASE
+	add	gp, a2			/* gp now adjusted		*/
+	sub	t6, gp, t6		/* t6 <-- relocation offset	*/
+	
+	li	t0, CFG_MONITOR_BASE
+	add	t2, t0, CFG_MONITOR_LEN
+	move	t1, a2
+
+	/*
+	 * t0 = source address
+	 * t1 = target address
+	 * t2 = source end address
+	 */
+1:
+	lw	t3, 0(t0)
+	sw	t3, 0(t1)
+	addu	t0, 4
+	ble	t0, t2, 1b
+	addu	t1, 4			/* delay slot			*/
+
+	/* If caches were enabled, we would have to flush them here.
+	 */
+
+	/* Jump to where we've relocated ourselves.
+	 */
+	addi	t0, a2, in_ram - _start
+	j	t0
+	nop
+
+	.word	uboot_end_data
+	.word	uboot_end
+	.word	num_got_entries
+
+in_ram:
+	/* Now we want to update GOT.
+	 */
+	lw	t3, -4(t0)	/* t3 <-- num_got_entries	*/
+	addi	t4, gp, 8	/* Skipping first two entries.	*/
+	li	t2, 2
+1:
+	lw	t1, 0(t4)
+	beqz	t1, 2f
+	add	t1, t6
+	sw	t1, 0(t4)
+2:
+	addi	t2, 1
+	blt	t2, t3, 1b
+	addi	t4, 4		/* delay slot			*/
+
+	/* Clear BSS.
+	 */
+	lw	t1, -12(t0)	/* t1 <-- uboot_end_data	*/
+	lw	t2, -8(t0)	/* t2 <-- uboot_end		*/
+	add	t1, t6		/* adjust pointers		*/
+	add	t2, t6
+
+	sub	t1, 4
+1:	addi	t1, 4
+	bltl	t1, t2, 1b
+	sw	zero, 0(t1)	/* delay slot			*/
+	
+	move	a0, a1
+	la	t9, board_init_r
+	j	t9
+	move	a1, a2		/* delay slot			*/
+
+	.end	relocate_code
+	
+
+
+	/* Exception handlers.
+	 */
+romReserved:
+	b romReserved
+
+romExcHandle:
+	b romExcHandle
+