Preliminary support for the iDMR board (ColdFire).

18 years ago · daa6e418bc
parent cdb97a6678
commit daa6e418bc
11 changed files with 951 additions and 3 deletions
--- a/4
+++ b/4
@ -299,8 +299,8 @@ LIST_microblaze="	\

 LIST_coldfire="	\
 	cobra5272	EB+MCF-EV123	EB+MCF-EV123_internal		\
-	M5271EVB	M5272C3		M5282EVB	TASREG		\
-	r5200		M5271EVB					\
+	idmr		 M5271EVB	M5272C3		M5282EVB	\
+	TASREG		r5200		M5271EVB			\
 "

 #########################################################################
--- a/3
+++ b/3
@ -1569,6 +1569,9 @@ EB+MCF-EV123_internal_config :	unconfig
 	@echo "TEXT_BASE = 0xF0000000"|tee $(obj)board/BuS/EB+MCF-EV123/textbase.mk
 	@$(MKCONFIG) EB+MCF-EV123 m68k mcf52x2 EB+MCF-EV123 BuS

+idmr_config :			unconfig
+	@$(MKCONFIG) $(@:_config=) m68k mcf52x2 idmr
+
 M5271EVB_config :		unconfig
 	@$(MKCONFIG) $(@:_config=) m68k mcf52x2 m5271evb

--- a/board/idmr/Makefile
+++ b/board/idmr/Makefile
@ -0,0 +1,44 @@
+#
+# (C) Copyright 2000-2006
+# 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	= $(obj)lib$(BOARD).a
+
+COBJS	= $(BOARD).o flash.o
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS))
+SOBJS	:= $(addprefix $(obj),$(SOBJS))
+
+$(LIB):	$(obj).depend $(OBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
--- a/board/idmr/config.mk
+++ b/board/idmr/config.mk
@ -0,0 +1,25 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+# Coldfire contribution by Bernhard Kuhn <bkuhn@metrowerks.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
+#
+
+TEXT_BASE = 0xff800000
--- a/board/idmr/flash.c
+++ b/board/idmr/flash.c
@ -0,0 +1,356 @@
+/*
+ * (C) Copyright 2000-2006
+ * 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>
+
+#define PHYS_FLASH_1 CFG_FLASH_BASE
+#define FLASH_BANK_SIZE 0x800000
+#define EN29LV640 0x227e227e
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
+
+void flash_print_info (flash_info_t * info)
+{
+	int i;
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+	case (AMD_MANUFACT & FLASH_VENDMASK):
+		printf ("AMD: ");
+		break;
+	default:
+		printf ("Unknown Vendor ");
+		break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case (EN29LV640 & FLASH_TYPEMASK):
+		printf ("EN29LV640 (16Mbit)\n");
+		break;
+	default:
+		printf ("Unknown Chip Type\n");
+		goto Done;
+		break;
+	}
+
+	printf ("  Size: %ld MB in %d Sectors\n",
+		info->size >> 20, info->sector_count);
+
+	printf ("  Sector Start Addresses:");
+	for (i = 0; i < info->sector_count; i++) {
+		if ((i % 5) == 0) {
+			printf ("\n   ");
+		}
+		printf (" %08lX%s", info->start[i],
+			info->protect[i] ? " (RO)" : "     ");
+	}
+	printf ("\n");
+
+      Done:
+	return;
+}
+
+
+unsigned long flash_init (void)
+{
+	int i, j;
+	ulong size = 0;
+
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+		ulong flashbase = 0;
+
+		flash_info[i].flash_id =
+			(AMD_MANUFACT & FLASH_VENDMASK) |
+			(EN29LV640 & FLASH_TYPEMASK);
+		flash_info[i].size = FLASH_BANK_SIZE;
+		flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
+		memset (flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
+		if (i == 0)
+			flashbase = PHYS_FLASH_1;
+		else
+			panic ("configured to many flash banks!\n");
+
+		for (j = 0; j < flash_info[i].sector_count; j++) {
+			flash_info[i].start[j] = flashbase + 0x10000 * j;
+		}
+		size += flash_info[i].size;
+	}
+
+	flash_protect (FLAG_PROTECT_SET,
+		       CFG_FLASH_BASE,
+		       CFG_FLASH_BASE + 0x30000, &flash_info[0]);
+
+	return size;
+}
+
+
+#define CMD_READ_ARRAY		0x00F0
+#define CMD_UNLOCK1		0x00AA
+#define CMD_UNLOCK2		0x0055
+#define CMD_ERASE_SETUP		0x0080
+#define CMD_ERASE_CONFIRM	0x0030
+#define CMD_PROGRAM		0x00A0
+#define CMD_UNLOCK_BYPASS	0x0020
+
+#define MEM_FLASH_ADDR1		(*(volatile u16 *)(CFG_FLASH_BASE + (0x00000555<<1)))
+#define MEM_FLASH_ADDR2		(*(volatile u16 *)(CFG_FLASH_BASE + (0x000002AA<<1)))
+
+#define BIT_ERASE_DONE		0x0080
+#define BIT_RDY_MASK		0x0080
+#define BIT_PROGRAM_ERROR	0x0020
+#define BIT_TIMEOUT		0x80000000	/* our flag */
+
+#define READY 1
+#define ERR   2
+#define TMO   4
+
+
+int flash_erase (flash_info_t * info, int s_first, int s_last)
+{
+	ulong result;
+	int iflag, prot, sect;
+	int rc = ERR_OK;
+	int chip1;
+
+	/* first look for protection bits */
+
+	if (info->flash_id == FLASH_UNKNOWN)
+		return ERR_UNKNOWN_FLASH_TYPE;
+
+	if ((s_first < 0) || (s_first > s_last)) {
+		return ERR_INVAL;
+	}
+
+	if ((info->flash_id & FLASH_VENDMASK) !=
+	    (AMD_MANUFACT & FLASH_VENDMASK)) {
+		return ERR_UNKNOWN_FLASH_VENDOR;
+	}
+
+	prot = 0;
+	for (sect = s_first; sect <= s_last; ++sect) {
+		if (info->protect[sect]) {
+			prot++;
+		}
+	}
+	if (prot)
+		return ERR_PROTECTED;
+
+	/*
+	 * Disable interrupts which might cause a timeout
+	 * here. Remember that our exception vectors are
+	 * at address 0 in the flash, and we don't want a
+	 * (ticker) exception to happen while the flash
+	 * chip is in programming mode.
+	 */
+	iflag = disable_interrupts ();
+
+	printf ("\n");
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last && !ctrlc (); sect++) {
+		printf ("Erasing sector %2d ... ", sect);
+
+		/* arm simple, non interrupt dependent timer */
+		set_timer (0);
+
+		if (info->protect[sect] == 0) {	/* not protected */
+			volatile u16 *addr =
+				(volatile u16 *) (info->start[sect]);
+
+			MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+			MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+			MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
+
+			MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+			MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+			*addr = CMD_ERASE_CONFIRM;
+
+			/* wait until flash is ready */
+			chip1 = 0;
+
+			do {
+				result = *addr;
+
+				/* check timeout */
+				if (get_timer (0) > CFG_FLASH_ERASE_TOUT * CFG_HZ / 1000) {
+					MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
+					chip1 = TMO;
+					break;
+				}
+
+				if (!chip1
+				    && (result & 0xFFFF) & BIT_ERASE_DONE)
+					chip1 = READY;
+
+			} while (!chip1);
+
+			MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
+
+			if (chip1 == ERR) {
+				rc = ERR_PROG_ERROR;
+				goto outahere;
+			}
+			if (chip1 == TMO) {
+				rc = ERR_TIMOUT;
+				goto outahere;
+			}
+
+			printf ("ok.\n");
+		} else {	/* it was protected */
+
+			printf ("protected!\n");
+		}
+	}
+
+	if (ctrlc ())
+		printf ("User Interrupt!\n");
+
+      outahere:
+	/* allow flash to settle - wait 10 ms */
+	printf("Waiting 10 ms...");
+	 udelay (10000);
+
+/*	for (i = 0; i < 10 * 1000 * 1000; ++i)
+		asm(" nop");
+*/
+
+	printf("done\n");
+	if (iflag)
+		enable_interrupts ();
+
+
+	return rc;
+}
+
+static int write_word (flash_info_t * info, ulong dest, ulong data)
+{
+	volatile u16 *addr = (volatile u16 *) dest;
+	ulong result;
+	int rc = ERR_OK;
+	int iflag;
+	int chip1;
+
+	/*
+	 * Check if Flash is (sufficiently) erased
+	 */
+	result = *addr;
+	if ((result & data) != data)
+		return ERR_NOT_ERASED;
+
+
+	/*
+	 * Disable interrupts which might cause a timeout
+	 * here. Remember that our exception vectors are
+	 * at address 0 in the flash, and we don't want a
+	 * (ticker) exception to happen while the flash
+	 * chip is in programming mode.
+	 */
+	iflag = disable_interrupts ();
+
+	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+	MEM_FLASH_ADDR1 = CMD_PROGRAM;
+	*addr = data;
+
+	/* arm simple, non interrupt dependent timer */
+	set_timer (0);
+
+	/* wait until flash is ready */
+	chip1 = 0;
+	do {
+		result = *addr;
+
+		/* check timeout */
+		if (get_timer (0) > CFG_FLASH_ERASE_TOUT * CFG_HZ / 1000) {
+			chip1 = ERR | TMO;
+			break;
+		}
+		if (!chip1 && ((result & 0x80) == (data & 0x80)))
+			chip1 = READY;
+
+	} while (!chip1);
+
+	*addr = CMD_READ_ARRAY;
+
+	if (chip1 == ERR || *addr != data)
+		rc = ERR_PROG_ERROR;
+
+	if (iflag)
+		enable_interrupts ();
+
+	return rc;
+}
+
+
+int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
+{
+	ulong wp, data;
+	int rc;
+
+	if (addr & 1) {
+		printf ("unaligned destination not supported\n");
+		return ERR_ALIGN;
+	}
+
+#if 0
+	if (cnt & 1) {
+		printf ("odd transfer sizes not supported\n");
+		return ERR_ALIGN;
+	}
+#endif
+
+	wp = addr;
+
+	if (addr & 1) {
+		data = (*((volatile u8 *) addr) << 8) | *((volatile u8 *)
+							  src);
+		if ((rc = write_word (info, wp - 1, data)) != 0) {
+			return (rc);
+		}
+		src += 1;
+		wp += 1;
+		cnt -= 1;
+	}
+
+	while (cnt >= 2) {
+		data = *((volatile u16 *) src);
+		if ((rc = write_word (info, wp, data)) != 0) {
+			return (rc);
+		}
+		src += 2;
+		wp += 2;
+		cnt -= 2;
+	}
+
+	if (cnt == 1) {
+		data = (*((volatile u8 *) src) << 8) |
+			*((volatile u8 *) (wp + 1));
+		if ((rc = write_word (info, wp, data)) != 0) {
+			return (rc);
+		}
+		src += 1;
+		wp += 1;
+		cnt -= 1;
+	}
+
+	return ERR_OK;
+}
--- a/board/idmr/idmr.c
+++ b/board/idmr/idmr.c
@ -0,0 +1,169 @@
+/*
+ * (C) Copyright 2000-2006
+ * 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/m5271.h>
+#include <asm/immap_5271.h>
+
+int checkboard (void) {
+	puts ("Board: iDMR\n");
+	return 0;
+};
+
+long int initdram (int board_type) {
+	int i;
+
+	/*
+	 * After reset, CS0 is configured to cover entire address space. We
+	 * need to configure it to its proper values, so that writes to
+	 * CFG_SDRAM_BASE and vicinity during SDRAM controller setup below do
+	 * now fall under CS0 (see 16.3.1 of the MCF5271 Reference Manual).
+	 */
+
+	/* Flash chipselect, CS0 */
+	/* ;CSAR0: Flash at 0xFF800000 */
+	mbar_writeShort(0x0080, 0xFF80);
+
+	/* CSCR0: Flash 6 waits, 16bit */
+	mbar_writeShort(0x008A, 0x1980);
+
+	/* CSMR0: Flash 8MB, R/W, valid */
+	mbar_writeLong(0x0084, 0x007F0001);
+
+
+	/*
+	 * SDRAM configuration proper
+	 */
+
+	/*
+	 * Address/Data Pin Assignment Reg.: enable address lines 23-21; do
+	 * not enable data pins D[15:0], as we have 16 bit port to SDRAM
+	 */
+	mbar_writeByte(MCF_GPIO_PAR_AD,
+			MCF_GPIO_AD_ADDR23 |
+			MCF_GPIO_AD_ADDR22 |
+			MCF_GPIO_AD_ADDR21);
+
+	/* No need to configure BS pins - reset values are OK */
+
+	/* Chip Select Pin Assignment Reg.: set CS[1-7] to GPIO */
+	mbar_writeByte(MCF_GPIO_PAR_CS, 0x00);
+
+	/* SDRAM Control Pin Assignment Reg. */
+	mbar_writeByte(MCF_GPIO_PAR_SDRAM,
+			MCF_GPIO_SDRAM_CSSDCS_00 | /* no matter: PAR_CS=0 */
+			MCF_GPIO_SDRAM_SDWE |
+			MCF_GPIO_SDRAM_SCAS |
+			MCF_GPIO_SDRAM_SRAS |
+			MCF_GPIO_SDRAM_SCKE |
+			MCF_GPIO_SDRAM_SDCS_01);
+
+	/*
+	 * Wait 100us.  We run the bus at 50Mhz, one cycle is 20ns. So 5
+	 * iterations will do, but we do 10 just to be safe.
+	 */
+	for (i = 0; i < 10; ++i)
+		asm(" nop");
+
+
+	/* 1. Initialize DRAM Control Register: DCR */
+	mbar_writeShort(MCF_SDRAMC_DCR,
+			MCF_SDRAMC_DCR_RTIM(0x10) |	/* 65ns */
+			MCF_SDRAMC_DCR_RC(0x60));	/* 1562 cycles */
+
+
+	/*
+	 * 2. Initialize DACR0
+	 *
+	 * CL: 11 (CL=3: 0x03, 0x02; CL=2: 0x1)
+	 * CBM: cmd at A20, bank select bits 21 and up
+	 * PS: 16 bit
+	 */
+	mbar_writeLong(MCF_SDRAMC_DACR0,
+			MCF_SDRAMC_DACRn_BA(CFG_SDRAM_BASE>>18) |
+			MCF_SDRAMC_DACRn_BA(0x00) |
+			MCF_SDRAMC_DACRn_CASL(0x03) |
+			MCF_SDRAMC_DACRn_CBM(0x03) |
+			MCF_SDRAMC_DACRn_PS(0x03));
+
+	/* Initialize DMR0 */
+	mbar_writeLong(MCF_SDRAMC_DMR0,
+			MCF_SDRAMC_DMRn_BAM_16M |
+			MCF_SDRAMC_DMRn_V);
+
+
+	/* 3. Set IP bit in DACR to initiate PALL command */
+	mbar_writeLong(MCF_SDRAMC_DACR0,
+			mbar_readLong(MCF_SDRAMC_DACR0) |
+			MCF_SDRAMC_DACRn_IP);
+
+	/* Write to this block to initiate precharge */
+	*(volatile u16 *)(CFG_SDRAM_BASE) = 0xa5a5;
+
+	/*
+	 * Wait at least 20ns to allow banks to precharge (t_RP = 20ns). We
+	 * wait a wee longer, just to be safe.
+	 */
+	for (i = 0; i < 5; ++i)
+		asm(" nop");
+
+
+	/* 4. Set RE bit in DACR */
+	mbar_writeLong(MCF_SDRAMC_DACR0,
+			mbar_readLong(MCF_SDRAMC_DACR0) |
+			MCF_SDRAMC_DACRn_RE);
+
+	/*
+	 * Wait for at least 8 auto refresh cycles to occur, i.e. at least
+	 * 781 bus cycles.
+	 */
+	for (i = 0; i < 1000; ++i)
+		asm(" nop");
+
+	/* Finish the configuration by issuing the MRS */
+	mbar_writeLong(MCF_SDRAMC_DACR0,
+			mbar_readLong(MCF_SDRAMC_DACR0) |
+			MCF_SDRAMC_DACRn_MRS);
+
+	/*
+	 * Write to the SDRAM Mode Register A0-A11 = 0x400
+	 *
+	 * Write Burst Mode = Programmed Burst Length
+	 * Op Mode = Standard Op
+	 * CAS Latency = 3
+	 * Burst Type = Sequential
+	 * Burst Length = 1
+	 */
+	*(volatile u32 *)(CFG_SDRAM_BASE + 0x1800) = 0xa5a5a5a5;
+
+	return CFG_SDRAM_SIZE * 1024 * 1024;
+};
+
+
+int testdram (void) {
+
+	/* TODO: XXX XXX XXX */
+	printf ("DRAM test not implemented!\n");
+
+	return (0);
+}
--- a/board/idmr/u-boot.lds
+++ b/board/idmr/u-boot.lds
@ -0,0 +1,145 @@
+/*
+ * (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
+ */
+
+OUTPUT_ARCH(m68k)
+SEARCH_DIR(/lib); SEARCH_DIR(/usr/lib); SEARCH_DIR(/usr/local/lib);
+/* Do we need any of these for elf?
+   __DYNAMIC = 0;    */
+GROUP(libgcc.a)
+SECTIONS
+{
+  /* Read-only sections, merged into text segment: */
+  . = + SIZEOF_HEADERS;
+  .interp : { *(.interp) }
+  .hash          : { *(.hash)		}
+  .dynsym        : { *(.dynsym)		}
+  .dynstr        : { *(.dynstr)		}
+  .rel.text      : { *(.rel.text)		}
+  .rela.text     : { *(.rela.text) 	}
+  .rel.data      : { *(.rel.data)		}
+  .rela.data     : { *(.rela.data) 	}
+  .rel.rodata    : { *(.rel.rodata) 	}
+  .rela.rodata   : { *(.rela.rodata) 	}
+  .rel.got       : { *(.rel.got)		}
+  .rela.got      : { *(.rela.got)		}
+  .rel.ctors     : { *(.rel.ctors)	}
+  .rela.ctors    : { *(.rela.ctors)	}
+  .rel.dtors     : { *(.rel.dtors)	}
+  .rela.dtors    : { *(.rela.dtors)	}
+  .rel.bss       : { *(.rel.bss)		}
+  .rela.bss      : { *(.rela.bss)		}
+  .rel.plt       : { *(.rel.plt)		}
+  .rela.plt      : { *(.rela.plt)		}
+  .init          : { *(.init)	}
+  .plt : { *(.plt) }
+  .text      :
+  {
+    /* WARNING - the following is hand-optimized to fit within	*/
+    /* the sector layout of our flash chips!	XXX FIXME XXX	*/
+
+    cpu/mcf52x2/start.o		(.text)
+    lib_m68k/traps.o		(.text)
+    cpu/mcf52x2/interrupts.o	(.text)
+    common/dlmalloc.o		(.text)
+    lib_generic/zlib.o		(.text)
+
+    . = DEFINED(env_offset) ? env_offset : .;
+    common/environment.o	(.ppcenv)
+
+    *(.text)
+    *(.fixup)
+    *(.got1)
+  }
+  _etext = .;
+  PROVIDE (etext = .);
+  .rodata    :
+  {
+    *(.rodata)
+    *(.rodata1)
+  }
+  .fini      : { *(.fini)    } =0
+  .ctors     : { *(.ctors)   }
+  .dtors     : { *(.dtors)   }
+
+  /* Read-write section, merged into data segment: */
+  . = (. + 0x00FF) & 0xFFFFFF00;
+  _erotext = .;
+  PROVIDE (erotext = .);
+
+  .reloc   :
+  {
+    __got_start = .;
+    *(.got)
+    __got_end = .;
+    _GOT2_TABLE_ = .;
+    *(.got2)
+    _FIXUP_TABLE_ = .;
+    *(.fixup)
+  }
+  __got2_entries = (_FIXUP_TABLE_ - _GOT2_TABLE_) >>2;
+  __fixup_entries = (. - _FIXUP_TABLE_)>>2;
+
+  .data    :
+  {
+    *(.data)
+    *(.data1)
+    *(.sdata)
+    *(.sdata2)
+    *(.dynamic)
+    CONSTRUCTORS
+  }
+  _edata  =  .;
+  PROVIDE (edata = .);
+
+  . = .;
+  __u_boot_cmd_start = .;
+  .u_boot_cmd : { *(.u_boot_cmd) }
+  __u_boot_cmd_end = .;
+
+
+  . = .;
+  __start___ex_table = .;
+  __ex_table : { *(__ex_table) }
+  __stop___ex_table = .;
+
+  . = ALIGN(256);
+  __init_begin = .;
+  .text.init : { *(.text.init) }
+  .data.init : { *(.data.init) }
+  . = ALIGN(256);
+  __init_end = .;
+
+  __bss_start = .;
+  .bss       :
+  {
+   _sbss = .;
+   *(.sbss) *(.scommon)
+   *(.dynbss)
+   *(.bss)
+   *(COMMON)
+   . = ALIGN(4);
+   _ebss = .;
+  }
+  _end = . ;
+  PROVIDE (end = .);
+}
--- a/common/environment.c
+++ b/common/environment.c
@ -61,6 +61,7 @@
     defined(CONFIG_TRAB)   	|| \
     defined(CONFIG_PPCHAMELEONEVB) || \
     defined(CONFIG_M5271EVB)	|| \
+     defined(CONFIG_IDMR)	|| \
     defined(CONFIG_NAND_U_BOOT))	&& \
     defined(ENV_CRC) /* Environment embedded in U-Boot .ppcenv section */
 /* XXX - This only works with GNU C */
--- a/cpu/mcf52x2/start.S
+++ b/cpu/mcf52x2/start.S
@ -140,11 +140,11 @@ _start:
 	move.l	#(CFG_MBAR + 1), %d0		/* set IPSBAR address + valid flag */
 	move.l	%d0, 0x40000000

-#if defined(CONFIG_M5282)
 	/* Initialize RAMBAR1: locate SRAM and validate it */
 	move.l	#(CFG_INIT_RAM_ADDR + 0x21), %d0
 	movec	%d0, %RAMBAR1

+#if defined(CONFIG_M5282)
 #if (TEXT_BASE == CFG_INT_FLASH_BASE)
 	/* Setup code in SRAM to initialize FLASHBAR, if start from internal Flash */

--- a/include/configs/idmr.h
+++ b/include/configs/idmr.h
@ -0,0 +1,197 @@
+/*
+ * Configuration settings for the iDMR board
+ *
+ * Based on MC5272C3, r5200  and M5271EVB board configs
+ * (C) Copyright 2006 Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ * (C) Copyright 2006 Lab X Technologies <zachary.landau@labxtechnologies.com>
+ * (C) Copyright 2003 Josef Baumgartner <josef.baumgartner@telex.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
+ */
+
+#ifndef _IDMR_H
+#define _IDMR_H
+
+
+/*
+ * High Level Configuration Options (easy to change)
+ */
+
+#define CONFIG_MCF52x2		/* define processor family */
+#define CONFIG_M5271		/* define processor type */
+#define CONFIG_IDMR		/* define board type */
+
+#undef CONFIG_WATCHDOG		/* disable watchdog */
+
+/*
+ * Default environment settings
+ */
+#define CONFIG_BOOTCOMMAND	"run net_nfs"
+#define CONFIG_BOOTDELAY	5
+#define CONFIG_BAUDRATE		19200
+#define CFG_BAUDRATE_TABLE	{ 9600 , 19200 , 38400 , 57600, 115200 }
+#define CONFIG_ETHADDR		00:06:3b:01:41:55
+#define CONFIG_ETHPRIME
+#define CONFIG_IPADDR		192.168.30.1
+#define CONFIG_SERVERIP		192.168.1.1
+#define CONFIG_ROOTPATH
+#define CONFIG_GATEWAYIP	192.168.1.1
+#define CONFIG_NETMASK		255.255.0.0
+#define CONFIG_HOSTNAME		idmr
+#define CONFIG_BOOTFILE		/tftpboot/idmr/uImage
+#define CONFIG_PREBOOT		"echo;echo Type \"run flash_nfs\" to mount root " \
+				"filesystem over NFS; echo"
+
+#define CONFIG_EXTRA_ENV_SETTINGS					\
+	"netdev=eth0\0"							\
+	"ramargs=setenv bootargs root=/dev/ram rw\0"			\
+	"addip=setenv bootargs $(bootargs) "				\
+		"ip=$(ipaddr):$(serverip):$(gatewayip):"		\
+		"$(netmask):$(hostname):$(netdev):off panic=1\0"	\
+	"flash_nfs=run nfsargs addip;bootm $(kernel_addr)\0"		\
+	"flash_self=run ramargs addip;bootm $(kernel_addr) "		\
+		"$(ramdisk_addr)\0"					\
+	"net_nfs=tftp 200000 $(bootfile);run nfsargs addip;bootm\0"	\
+	"nfsargs=setenv bootargs root=/dev/nfs rw "			\
+		"nfsroot=$(serverip):$(rootpath)\0"			\
+	"ethact=FEC ETHERNET\0"						\
+	"update=prot off ff800000 ff81ffff; era ff800000 ff81ffff; "	\
+		"cp.b 200000 ff800000 $(filesize);"			\
+		"prot on ff800000 ff81ffff\0"				\
+	"load=tftp 200000 $(u-boot)\0"					\
+	"u-boot=/tftpboot/idmr/u-boot.bin\0"				\
+	""
+
+/*
+ * Commands' definition
+ */
+#define CONFIG_COMMANDS		((CONFIG_CMD_DFL		| \
+					CFG_CMD_PING		| \
+					CFG_CMD_NET		| \
+					CFG_CMD_MII)		& \
+					~(CFG_CMD_LOADS		| \
+						CFG_CMD_LOADB))
+
+/* this must be included AFTER the definition of CONFIG_COMMANDS (if any) */
+#include <cmd_confdefs.h>
+
+
+/*
+ * Low Level Configuration Settings
+ * (address mappings, register initial values, etc.)
+ * You should know what you are doing if you make changes here.
+ */
+
+/*
+ * Configuration for environment, which occupies third sector in flash.
+ */
+#ifndef CONFIG_MONITOR_IS_IN_RAM
+#define CFG_ENV_ADDR		0xff820000
+#define CFG_ENV_SECT_SIZE	0x10000
+#define CFG_ENV_SIZE		0x2000
+#define CFG_ENV_IS_IN_FLASH
+#else /* CONFIG_MONITOR_IS_IN_RAM */
+#define CFG_ENV_OFFSET		0x4000
+#define CFG_ENV_SECT_SIZE	0x2000
+#define CFG_ENV_IS_IN_FLASH
+#endif /* !CONFIG_MONITOR_IS_IN_RAM */
+
+#define CFG_PROMPT		"=> "
+#define CFG_LONGHELP				/* undef to save memory */
+
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+#define CFG_CBSIZE		1024		/* Console I/O Buffer Size */
+#else /* !(CONFIG_COMMANDS & CFG_CMD_KGDB) */
+#define CFG_CBSIZE		256		/* Console I/O Buffer Size */
+#endif /* (CONFIG_COMMANDS & CFG_CMD_KGDB) */
+
+#define CFG_PBSIZE (CFG_CBSIZE+sizeof(CFG_PROMPT)+16) /* Print Buffer Size */
+#define CFG_MAXARGS		16		/* max number of command args */
+#define CFG_BARGSIZE		CFG_CBSIZE	/* Boot Argument Buffer Size */
+
+#define CFG_LOAD_ADDR		0x00100000
+
+#define CFG_MEMTEST_START	0x400
+#define CFG_MEMTEST_END		0x380000
+
+#define CFG_HZ			(50000000 / 64)
+#define CFG_CLK			100000000
+
+#define CFG_MBAR		0x40000000	/* Register Base Addrs */
+
+/*
+ * Ethernet
+ */
+#define FEC_ENET
+#define CONFIG_NET_RETRY_COUNT	5
+#define CFG_ENET_BD_BASE	0x480000
+#define CFG_DISCOVER_PHY	1
+#define CONFIG_MII		1
+
+/*
+ * Definitions for initial stack pointer and data area (in DPRAM)
+ */
+#define CFG_INIT_RAM_ADDR	0x20000000
+#define CFG_INIT_RAM_END	0x1000	/* End of used area in internal SRAM */
+#define CFG_GBL_DATA_SIZE	64	/* size in bytes reserved for initial data */
+#define CFG_GBL_DATA_OFFSET	(CFG_INIT_RAM_END - CFG_GBL_DATA_SIZE)
+#define CFG_INIT_SP_OFFSET	CFG_GBL_DATA_OFFSET
+
+/*
+ * Start addresses for the final memory configuration
+ * (Set up by the startup code)
+ * Please note that CFG_SDRAM_BASE _must_ start at 0
+ */
+#define CFG_SDRAM_BASE		0x00000000
+#define CFG_SDRAM_SIZE		16		/* SDRAM size in MB */
+#define CFG_FLASH_BASE		0xff800000
+
+#ifdef CONFIG_MONITOR_IS_IN_RAM
+#define CFG_MONITOR_BASE	0x20000
+#else /* !CONFIG_MONITOR_IS_IN_RAM */
+#define CFG_MONITOR_BASE	(CFG_FLASH_BASE + 0x400)
+#endif /* CONFIG_MONITOR_IS_IN_RAM */
+
+#define CFG_MONITOR_LEN		0x20000
+#define CFG_MALLOC_LEN		(256 << 10)
+#define CFG_BOOTPARAMS_LEN	(64*1024)
+
+/*
+ * For booting Linux, the board info and command line data
+ * have to be in the first 8 MB of memory, since this is
+ * the maximum mapped by the Linux kernel during initialization ??
+ */
+#define CFG_BOOTMAPSZ		(8 << 20)	/* Initial Memory map for Linux */
+
+/* FLASH organization */
+#define CFG_MAX_FLASH_BANKS	1	/* max number of memory banks */
+#define CFG_MAX_FLASH_SECT	128	/* max number of sectors on one chip */
+#define CFG_FLASH_ERASE_TOUT	1000
+
+#define CFG_FLASH_SIZE		0x800000
+/*
+ * #define CFG_FLASH_USE_BUFFER_WRITE	1
+ */
+
+/* Cache Configuration */
+#define CFG_CACHELINE_SIZE	16
+
+/* Port configuration */
+#define CFG_FECI2C		0xF0
+#endif /* _IDMR_H */
--- a/lib_m68k/time.c
+++ b/lib_m68k/time.c
@ -153,7 +153,11 @@ void udelay(unsigned long usec)
 		timerp[MCFTIMER_PMR] = 0;
 		/* set period to 1 us */
 		timerp[MCFTIMER_PCSR] =
+#ifdef CONFIG_M5271
+			(6 << 8) | MCFTIMER_PCSR_EN | MCFTIMER_PCSR_OVW;
+#else /* !CONFIG_M5271 */
 			(5 << 8) | MCFTIMER_PCSR_EN | MCFTIMER_PCSR_OVW;
+#endif /* CONFIG_M5271 */

 		timerp[MCFTIMER_PMR] = tmp;
 		while (timerp[MCFTIMER_PCNTR] > 0);
@ -171,7 +175,11 @@ void timer_init (void)
 	timerp[MCFTIMER_PCSR] = MCFTIMER_PCSR_OVW;
 	timerp[MCFTIMER_PMR] = lastinc = 0;
 	timerp[MCFTIMER_PCSR] =
+#ifdef CONFIG_M5271
+		(6 << 8) | MCFTIMER_PCSR_EN | MCFTIMER_PCSR_OVW;
+#else /* !CONFIG_M5271 */
 		(5 << 8) | MCFTIMER_PCSR_EN | MCFTIMER_PCSR_OVW;
+#endif /* CONFIG_M5271 */
 }

 void set_timer (ulong t)