cpu/mpc85xx/cpu.c - u-boot - Git at Google

 /*
  * Copyright 2004,2007,2008 Freescale Semiconductor, Inc.
  * (C) Copyright 2002, 2003 Motorola Inc.
  * Xianghua Xiao (X.Xiao@motorola.com)
  *
  * (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
  */

 #include <config.h>
 #include <common.h>
 #include <watchdog.h>
 #include <command.h>
 #include <tsec.h>
 #include <netdev.h>
 #include <asm/cache.h>
 #include <asm/io.h>

 DECLARE_GLOBAL_DATA_PTR;

 struct cpu_type cpu_type_list [] = {
 	CPU_TYPE_ENTRY(8533, 8533),
 	CPU_TYPE_ENTRY(8533, 8533_E),
 	CPU_TYPE_ENTRY(8536, 8536),
 	CPU_TYPE_ENTRY(8536, 8536_E),
 	CPU_TYPE_ENTRY(8540, 8540),
 	CPU_TYPE_ENTRY(8541, 8541),
 	CPU_TYPE_ENTRY(8541, 8541_E),
 	CPU_TYPE_ENTRY(8543, 8543),
 	CPU_TYPE_ENTRY(8543, 8543_E),
 	CPU_TYPE_ENTRY(8544, 8544),
 	CPU_TYPE_ENTRY(8544, 8544_E),
 	CPU_TYPE_ENTRY(8545, 8545),
 	CPU_TYPE_ENTRY(8545, 8545_E),
 	CPU_TYPE_ENTRY(8547, 8547_E),
 	CPU_TYPE_ENTRY(8548, 8548),
 	CPU_TYPE_ENTRY(8548, 8548_E),
 	CPU_TYPE_ENTRY(8555, 8555),
 	CPU_TYPE_ENTRY(8555, 8555_E),
 	CPU_TYPE_ENTRY(8560, 8560),
 	CPU_TYPE_ENTRY(8567, 8567),
 	CPU_TYPE_ENTRY(8567, 8567_E),
 	CPU_TYPE_ENTRY(8568, 8568),
 	CPU_TYPE_ENTRY(8568, 8568_E),
 	CPU_TYPE_ENTRY(8572, 8572),
 	CPU_TYPE_ENTRY(8572, 8572_E),
 };

 struct cpu_type *identify_cpu(u32 ver)
 {
 	int i;
 	for (i = 0; i < ARRAY_SIZE(cpu_type_list); i++)
 		if (cpu_type_list[i].soc_ver == ver)
 			return &cpu_type_list[i];

 	return NULL;
 }

 int checkcpu (void)
 {
 	sys_info_t sysinfo;
 	uint pvr, svr;
 	uint fam;
 	uint ver;
 	uint major, minor;
 	struct cpu_type *cpu;
 	char buf1[32], buf2[32];
 #ifdef CONFIG_DDR_CLK_FREQ
 	volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 	u32 ddr_ratio = ((gur->porpllsr) & MPC85xx_PORPLLSR_DDR_RATIO)
 		>> MPC85xx_PORPLLSR_DDR_RATIO_SHIFT;
 #else
 	u32 ddr_ratio = 0;
 #endif
 	int i;

 	svr = get_svr();
 	ver = SVR_SOC_VER(svr);
 	major = SVR_MAJ(svr);
 #ifdef CONFIG_MPC8536
 	major &= 0x7; /* the msb of this nibble is a mfg code */
 #endif
 	minor = SVR_MIN(svr);

 #if (CONFIG_NUM_CPUS > 1)
 	volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR);
 	printf("CPU%d:  ", pic->whoami);
 #else
 	puts("CPU:   ");
 #endif

 	cpu = identify_cpu(ver);
 	if (cpu) {
 		puts(cpu->name);

 		if (IS_E_PROCESSOR(svr))
 			puts("E");
 	} else {
 		puts("Unknown");
 	}

 	printf(", Version: %d.%d, (0x%08x)\n", major, minor, svr);

 	pvr = get_pvr();
 	fam = PVR_FAM(pvr);
 	ver = PVR_VER(pvr);
 	major = PVR_MAJ(pvr);
 	minor = PVR_MIN(pvr);

 	printf("Core:  ");
 	switch (fam) {
 	case PVR_FAM(PVR_85xx):
 	    puts("E500");
 	    break;
 	default:
 	    puts("Unknown");
 	    break;
 	}

 	if (PVR_MEM(pvr) == 0x03)
 		puts("MC");

 	printf(", Version: %d.%d, (0x%08x)\n", major, minor, pvr);

 	get_sys_info(&sysinfo);

 	puts("Clock Configuration:\n       ");
 	for (i = 0; i < CONFIG_NUM_CPUS; i++)
 		printf("CPU%d:%-4s MHz, ",
 				i,strmhz(buf1, sysinfo.freqProcessor[i]));
 	printf("CCB:%-4s MHz,\n", strmhz(buf1, sysinfo.freqSystemBus));

 	switch (ddr_ratio) {
 	case 0x0:
 		printf("       DDR:%-4s MHz (%s MT/s data rate), ",
 			strmhz(buf1, sysinfo.freqDDRBus/2),
 			strmhz(buf2, sysinfo.freqDDRBus));
 		break;
 	case 0x7:
 		printf("       DDR:%-4s MHz (%s MT/s data rate) (Synchronous), ",
 			strmhz(buf1, sysinfo.freqDDRBus/2),
 			strmhz(buf2, sysinfo.freqDDRBus));
 		break;
 	default:
 		printf("       DDR:%-4s MHz (%s MT/s data rate) (Asynchronous), ",
 			strmhz(buf1, sysinfo.freqDDRBus/2),
 			strmhz(buf2, sysinfo.freqDDRBus));
 		break;
 	}

 	if (sysinfo.freqLocalBus > LCRR_CLKDIV)
 		printf("LBC:%-4s MHz\n", strmhz(buf1, sysinfo.freqLocalBus));
 	else
 		printf("LBC: unknown (LCRR[CLKDIV] = 0x%02lx)\n",
 		       sysinfo.freqLocalBus);

 #ifdef CONFIG_CPM2
 	printf("CPM:   %s MHz\n", strmhz(buf1, sysinfo.freqSystemBus));
 #endif

 	puts("L1:    D-cache 32 kB enabled\n       I-cache 32 kB enabled\n");

 	return 0;
 }


 /* ------------------------------------------------------------------------- */

 int do_reset (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
 {
 	uint pvr;
 	uint ver;
 	unsigned long val, msr;

 	pvr = get_pvr();
 	ver = PVR_VER(pvr);

 	if (ver & 1){
 	/* e500 v2 core has reset control register */
 		volatile unsigned int * rstcr;
 		rstcr = (volatile unsigned int *)(CONFIG_SYS_IMMR + 0xE00B0);
 		*rstcr = 0x2;		/* HRESET_REQ */
 		udelay(100);
 	}

 	/*
 	 * Fallthrough if the code above failed
 	 * Initiate hard reset in debug control register DBCR0
 	 * Make sure MSR[DE] = 1
 	 */

 	msr = mfmsr ();
 	msr |= MSR_DE;
 	mtmsr (msr);

 	val = mfspr(DBCR0);
 	val |= 0x70000000;
 	mtspr(DBCR0,val);

 	return 1;
 }


 /*
  * Get timebase clock frequency
  */
 unsigned long get_tbclk (void)
 {
 	return (gd->bus_clk + 4UL)/8UL;
 }


 #if defined(CONFIG_WATCHDOG)
 void
 watchdog_reset(void)
 {
 	int re_enable = disable_interrupts();
 	reset_85xx_watchdog();
 	if (re_enable) enable_interrupts();
 }

 void
 reset_85xx_watchdog(void)
 {
 	/*
 	 * Clear TSR(WIS) bit by writing 1
 	 */
 	unsigned long val;
 	val = mfspr(SPRN_TSR);
 	val |= TSR_WIS;
 	mtspr(SPRN_TSR, val);
 }
 #endif	/* CONFIG_WATCHDOG */

 #if defined(CONFIG_DDR_ECC)
 void dma_init(void) {
 	volatile ccsr_dma_t *dma = (void *)(CONFIG_SYS_MPC85xx_DMA_ADDR);

 	dma->satr0 = 0x02c40000;
 	dma->datr0 = 0x02c40000;
 	dma->sr0 = 0xfffffff; /* clear any errors */
 	asm("sync; isync; msync");
 	return;
 }

 uint dma_check(void) {
 	volatile ccsr_dma_t *dma = (void *)(CONFIG_SYS_MPC85xx_DMA_ADDR);
 	volatile uint status = dma->sr0;

 	/* While the channel is busy, spin */
 	while((status & 4) == 4) {
 		status = dma->sr0;
 	}

 	/* clear MR0[CS] channel start bit */
 	dma->mr0 &= 0x00000001;
 	asm("sync;isync;msync");

 	if (status != 0) {
 		printf ("DMA Error: status = %x\n", status);
 	}
 	return status;
 }

 int dma_xfer(void *dest, uint count, void *src) {
 	volatile ccsr_dma_t *dma = (void *)(CONFIG_SYS_MPC85xx_DMA_ADDR);

 	dma->dar0 = (uint) dest;
 	dma->sar0 = (uint) src;
 	dma->bcr0 = count;
 	dma->mr0 = 0xf000004;
 	asm("sync;isync;msync");
 	dma->mr0 = 0xf000005;
 	asm("sync;isync;msync");
 	return dma_check();
 }
 #endif

 /*
  * Configures a UPM. The function requires the respective MxMR to be set
  * before calling this function. "size" is the number or entries, not a sizeof.
  */
 void upmconfig (uint upm, uint * table, uint size)
 {
 	int i, mdr, mad, old_mad = 0;
 	volatile u32 *mxmr;
 	volatile ccsr_lbc_t *lbc = (void *)(CONFIG_SYS_MPC85xx_LBC_ADDR);
 	volatile u32 *brp,*orp;
 	volatile u8* dummy = NULL;
 	int upmmask;

 	switch (upm) {
 	case UPMA:
 		mxmr = &lbc->mamr;
 		upmmask = BR_MS_UPMA;
 		break;
 	case UPMB:
 		mxmr = &lbc->mbmr;
 		upmmask = BR_MS_UPMB;
 		break;
 	case UPMC:
 		mxmr = &lbc->mcmr;
 		upmmask = BR_MS_UPMC;
 		break;
 	default:
 		printf("%s: Bad UPM index %d to configure\n", __FUNCTION__, upm);
 		hang();
 	}

 	/* Find the address for the dummy write transaction */
 	for (brp = &lbc->br0, orp = &lbc->or0, i = 0; i < 8;
 		 i++, brp += 2, orp += 2) {

 		/* Look for a valid BR with selected UPM */
 		if ((in_be32(brp) & (BR_V | BR_MSEL)) == (BR_V | upmmask)) {
 			dummy = (volatile u8*)(in_be32(brp) & BR_BA);
 			break;
 		}
 	}

 	if (i == 8) {
 		printf("Error: %s() could not find matching BR\n", __FUNCTION__);
 		hang();
 	}

 	for (i = 0; i < size; i++) {
 		/* 1 */
 		out_be32(mxmr,  (in_be32(mxmr) & 0x4fffffc0) | MxMR_OP_WARR | i);
 		/* 2 */
 		out_be32(&lbc->mdr, table[i]);
 		/* 3 */
 		mdr = in_be32(&lbc->mdr);
 		/* 4 */
 		*(volatile u8 *)dummy = 0;
 		/* 5 */
 		do {
 			mad = in_be32(mxmr) & MxMR_MAD_MSK;
 		} while (mad <= old_mad && !(!mad && i == (size-1)));
 		old_mad = mad;
 	}
 	out_be32(mxmr, (in_be32(mxmr) & 0x4fffffc0) | MxMR_OP_NORM);
 }


 /*
  * Initializes on-chip ethernet controllers.
  * to override, implement board_eth_init()
  */
 int cpu_eth_init(bd_t *bis)
 {
 #if defined(CONFIG_ETHER_ON_FCC)
 	fec_initialize(bis);
 #endif
 #if defined(CONFIG_UEC_ETH1)
 	uec_initialize(0);
 #endif
 #if defined(CONFIG_UEC_ETH2)
 	uec_initialize(1);
 #endif
 #if defined(CONFIG_UEC_ETH3)
 	uec_initialize(2);
 #endif
 #if defined(CONFIG_UEC_ETH4)
 	uec_initialize(3);
 #endif
 #if defined(CONFIG_UEC_ETH5)
 	uec_initialize(4);
 #endif
 #if defined(CONFIG_UEC_ETH6)
 	uec_initialize(5);
 #endif
 #if defined(CONFIG_TSEC_ENET) || defined(CONFIG_MPC85XX_FEC)
 	tsec_standard_init(bis);
 #endif
 	return 0;
 }
	/*
	* Copyright 2004,2007,2008 Freescale Semiconductor, Inc.
	* (C) Copyright 2002, 2003 Motorola Inc.
	* Xianghua Xiao (X.Xiao@motorola.com)
	*
	* (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
	*/

	#include <config.h>
	#include <common.h>
	#include <watchdog.h>
	#include <command.h>
	#include <tsec.h>
	#include <netdev.h>
	#include <asm/cache.h>
	#include <asm/io.h>

	DECLARE_GLOBAL_DATA_PTR;

	struct cpu_type cpu_type_list [] = {
	CPU_TYPE_ENTRY(8533, 8533),
	CPU_TYPE_ENTRY(8533, 8533_E),
	CPU_TYPE_ENTRY(8536, 8536),
	CPU_TYPE_ENTRY(8536, 8536_E),
	CPU_TYPE_ENTRY(8540, 8540),
	CPU_TYPE_ENTRY(8541, 8541),
	CPU_TYPE_ENTRY(8541, 8541_E),
	CPU_TYPE_ENTRY(8543, 8543),
	CPU_TYPE_ENTRY(8543, 8543_E),
	CPU_TYPE_ENTRY(8544, 8544),
	CPU_TYPE_ENTRY(8544, 8544_E),
	CPU_TYPE_ENTRY(8545, 8545),
	CPU_TYPE_ENTRY(8545, 8545_E),
	CPU_TYPE_ENTRY(8547, 8547_E),
	CPU_TYPE_ENTRY(8548, 8548),
	CPU_TYPE_ENTRY(8548, 8548_E),
	CPU_TYPE_ENTRY(8555, 8555),
	CPU_TYPE_ENTRY(8555, 8555_E),
	CPU_TYPE_ENTRY(8560, 8560),
	CPU_TYPE_ENTRY(8567, 8567),
	CPU_TYPE_ENTRY(8567, 8567_E),
	CPU_TYPE_ENTRY(8568, 8568),
	CPU_TYPE_ENTRY(8568, 8568_E),
	CPU_TYPE_ENTRY(8572, 8572),
	CPU_TYPE_ENTRY(8572, 8572_E),
	};

	struct cpu_type *identify_cpu(u32 ver)
	{
	int i;
	for (i = 0; i < ARRAY_SIZE(cpu_type_list); i++)
	if (cpu_type_list[i].soc_ver == ver)
	return &cpu_type_list[i];

	return NULL;
	}

	int checkcpu (void)
	{
	sys_info_t sysinfo;
	uint pvr, svr;
	uint fam;
	uint ver;
	uint major, minor;
	struct cpu_type *cpu;
	char buf1[32], buf2[32];
	#ifdef CONFIG_DDR_CLK_FREQ
	volatile ccsr_gur_t gur = (void )(CONFIG_SYS_MPC85xx_GUTS_ADDR);
	u32 ddr_ratio = ((gur->porpllsr) & MPC85xx_PORPLLSR_DDR_RATIO)
	>> MPC85xx_PORPLLSR_DDR_RATIO_SHIFT;
	#else
	u32 ddr_ratio = 0;
	#endif
	int i;

	svr = get_svr();
	ver = SVR_SOC_VER(svr);
	major = SVR_MAJ(svr);
	#ifdef CONFIG_MPC8536
	major &= 0x7; /* the msb of this nibble is a mfg code */
	#endif
	minor = SVR_MIN(svr);

	#if (CONFIG_NUM_CPUS > 1)
	volatile ccsr_pic_t pic = (void )(CONFIG_SYS_MPC85xx_PIC_ADDR);
	printf("CPU%d: ", pic->whoami);
	#else
	puts("CPU: ");
	#endif

	cpu = identify_cpu(ver);
	if (cpu) {
	puts(cpu->name);

	if (IS_E_PROCESSOR(svr))
	puts("E");
	} else {
	puts("Unknown");
	}

	printf(", Version: %d.%d, (0x%08x)\n", major, minor, svr);

	pvr = get_pvr();
	fam = PVR_FAM(pvr);
	ver = PVR_VER(pvr);
	major = PVR_MAJ(pvr);
	minor = PVR_MIN(pvr);

	printf("Core: ");
	switch (fam) {
	case PVR_FAM(PVR_85xx):
	puts("E500");
	break;
	default:
	puts("Unknown");
	break;
	}

	if (PVR_MEM(pvr) == 0x03)
	puts("MC");

	printf(", Version: %d.%d, (0x%08x)\n", major, minor, pvr);

	get_sys_info(&sysinfo);

	puts("Clock Configuration:\n ");
	for (i = 0; i < CONFIG_NUM_CPUS; i++)
	printf("CPU%d:%-4s MHz, ",
	i,strmhz(buf1, sysinfo.freqProcessor[i]));
	printf("CCB:%-4s MHz,\n", strmhz(buf1, sysinfo.freqSystemBus));

	switch (ddr_ratio) {
	case 0x0:
	printf(" DDR:%-4s MHz (%s MT/s data rate), ",
	strmhz(buf1, sysinfo.freqDDRBus/2),
	strmhz(buf2, sysinfo.freqDDRBus));
	break;
	case 0x7:
	printf(" DDR:%-4s MHz (%s MT/s data rate) (Synchronous), ",
	strmhz(buf1, sysinfo.freqDDRBus/2),
	strmhz(buf2, sysinfo.freqDDRBus));
	break;
	default:
	printf(" DDR:%-4s MHz (%s MT/s data rate) (Asynchronous), ",
	strmhz(buf1, sysinfo.freqDDRBus/2),
	strmhz(buf2, sysinfo.freqDDRBus));
	break;
	}

	if (sysinfo.freqLocalBus > LCRR_CLKDIV)
	printf("LBC:%-4s MHz\n", strmhz(buf1, sysinfo.freqLocalBus));
	else
	printf("LBC: unknown (LCRR[CLKDIV] = 0x%02lx)\n",
	sysinfo.freqLocalBus);

	#ifdef CONFIG_CPM2
	printf("CPM: %s MHz\n", strmhz(buf1, sysinfo.freqSystemBus));
	#endif

	puts("L1: D-cache 32 kB enabled\n I-cache 32 kB enabled\n");

	return 0;
	}


	/* ------------------------------------------------------------------------- */

	int do_reset (cmd_tbl_t cmdtp, bd_t bd, int flag, int argc, char *argv[])
	{
	uint pvr;
	uint ver;
	unsigned long val, msr;

	pvr = get_pvr();
	ver = PVR_VER(pvr);

	if (ver & 1){
	/* e500 v2 core has reset control register */
	volatile unsigned int * rstcr;
	rstcr = (volatile unsigned int *)(CONFIG_SYS_IMMR + 0xE00B0);
	rstcr = 0x2; / HRESET_REQ */
	udelay(100);
	}

	/*
	* Fallthrough if the code above failed
	* Initiate hard reset in debug control register DBCR0
	* Make sure MSR[DE] = 1
	*/

	msr = mfmsr ();
	msr \|= MSR_DE;
	mtmsr (msr);

	val = mfspr(DBCR0);
	val \|= 0x70000000;
	mtspr(DBCR0,val);

	return 1;
	}


	/*
	* Get timebase clock frequency
	*/
	unsigned long get_tbclk (void)
	{
	return (gd->bus_clk + 4UL)/8UL;
	}


	#if defined(CONFIG_WATCHDOG)
	void
	watchdog_reset(void)
	{
	int re_enable = disable_interrupts();
	reset_85xx_watchdog();
	if (re_enable) enable_interrupts();
	}

	void
	reset_85xx_watchdog(void)
	{
	/*
	* Clear TSR(WIS) bit by writing 1
	*/
	unsigned long val;
	val = mfspr(SPRN_TSR);
	val \|= TSR_WIS;
	mtspr(SPRN_TSR, val);
	}
	#endif /* CONFIG_WATCHDOG */

	#if defined(CONFIG_DDR_ECC)
	void dma_init(void) {
	volatile ccsr_dma_t dma = (void )(CONFIG_SYS_MPC85xx_DMA_ADDR);

	dma->satr0 = 0x02c40000;
	dma->datr0 = 0x02c40000;
	dma->sr0 = 0xfffffff; /* clear any errors */
	asm("sync; isync; msync");
	return;
	}

	uint dma_check(void) {
	volatile ccsr_dma_t dma = (void )(CONFIG_SYS_MPC85xx_DMA_ADDR);
	volatile uint status = dma->sr0;

	/* While the channel is busy, spin */
	while((status & 4) == 4) {
	status = dma->sr0;
	}

	/* clear MR0[CS] channel start bit */
	dma->mr0 &= 0x00000001;
	asm("sync;isync;msync");

	if (status != 0) {
	printf ("DMA Error: status = %x\n", status);
	}
	return status;
	}

	int dma_xfer(void dest, uint count, void src) {
	volatile ccsr_dma_t dma = (void )(CONFIG_SYS_MPC85xx_DMA_ADDR);

	dma->dar0 = (uint) dest;
	dma->sar0 = (uint) src;
	dma->bcr0 = count;
	dma->mr0 = 0xf000004;
	asm("sync;isync;msync");
	dma->mr0 = 0xf000005;
	asm("sync;isync;msync");
	return dma_check();
	}
	#endif

	/*
	* Configures a UPM. The function requires the respective MxMR to be set
	* before calling this function. "size" is the number or entries, not a sizeof.
	*/
	void upmconfig (uint upm, uint * table, uint size)
	{
	int i, mdr, mad, old_mad = 0;
	volatile u32 *mxmr;
	volatile ccsr_lbc_t lbc = (void )(CONFIG_SYS_MPC85xx_LBC_ADDR);
	volatile u32 brp,orp;
	volatile u8* dummy = NULL;
	int upmmask;

	switch (upm) {
	case UPMA:
	mxmr = &lbc->mamr;
	upmmask = BR_MS_UPMA;
	break;
	case UPMB:
	mxmr = &lbc->mbmr;
	upmmask = BR_MS_UPMB;
	break;
	case UPMC:
	mxmr = &lbc->mcmr;
	upmmask = BR_MS_UPMC;
	break;
	default:
	printf("%s: Bad UPM index %d to configure\n", __FUNCTION__, upm);
	hang();
	}

	/* Find the address for the dummy write transaction */
	for (brp = &lbc->br0, orp = &lbc->or0, i = 0; i < 8;
	i++, brp += 2, orp += 2) {

	/* Look for a valid BR with selected UPM */
	if ((in_be32(brp) & (BR_V \| BR_MSEL)) == (BR_V \| upmmask)) {
	dummy = (volatile u8*)(in_be32(brp) & BR_BA);
	break;
	}
	}

	if (i == 8) {
	printf("Error: %s() could not find matching BR\n", __FUNCTION__);
	hang();
	}

	for (i = 0; i < size; i++) {
	/* 1 */
	out_be32(mxmr, (in_be32(mxmr) & 0x4fffffc0) \| MxMR_OP_WARR \| i);
	/* 2 */
	out_be32(&lbc->mdr, table[i]);
	/* 3 */
	mdr = in_be32(&lbc->mdr);
	/* 4 */
	(volatile u8 )dummy = 0;
	/* 5 */
	do {
	mad = in_be32(mxmr) & MxMR_MAD_MSK;
	} while (mad <= old_mad && !(!mad && i == (size-1)));
	old_mad = mad;
	}
	out_be32(mxmr, (in_be32(mxmr) & 0x4fffffc0) \| MxMR_OP_NORM);
	}


	/*
	* Initializes on-chip ethernet controllers.
	* to override, implement board_eth_init()
	*/
	int cpu_eth_init(bd_t *bis)
	{
	#if defined(CONFIG_ETHER_ON_FCC)
	fec_initialize(bis);
	#endif
	#if defined(CONFIG_UEC_ETH1)
	uec_initialize(0);
	#endif
	#if defined(CONFIG_UEC_ETH2)
	uec_initialize(1);
	#endif
	#if defined(CONFIG_UEC_ETH3)
	uec_initialize(2);
	#endif
	#if defined(CONFIG_UEC_ETH4)
	uec_initialize(3);
	#endif
	#if defined(CONFIG_UEC_ETH5)
	uec_initialize(4);
	#endif
	#if defined(CONFIG_UEC_ETH6)
	uec_initialize(5);
	#endif
	#if defined(CONFIG_TSEC_ENET) \|\| defined(CONFIG_MPC85XX_FEC)
	tsec_standard_init(bis);
	#endif
	return 0;
	}