arch/powerpc/cpu/mpc85xx/mp.c - platform/external/u-boot - Gitiles

 /*
  * Copyright 2008-2010 Freescale Semiconductor, 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 <common.h>
 #include <asm/processor.h>
 #include <ioports.h>
 #include <lmb.h>
 #include <asm/io.h>
 #include <asm/mmu.h>
 #include <asm/fsl_law.h>
 #include "mp.h"

 DECLARE_GLOBAL_DATA_PTR;

 u32 get_my_id()
 {
 	return mfspr(SPRN_PIR);
 }

 int cpu_reset(int nr)
 {
 	volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR);
 	out_be32(&pic->pir, 1 << nr);
 	/* the dummy read works around an errata on early 85xx MP PICs */
 	(void)in_be32(&pic->pir);
 	out_be32(&pic->pir, 0x0);

 	return 0;
 }

 int cpu_status(int nr)
 {
 	u32 *table, id = get_my_id();

 	if (nr == id) {
 		table = (u32 *)get_spin_virt_addr();
 		printf("table base @ 0x%p\n", table);
 	} else {
 		table = (u32 *)get_spin_virt_addr() + nr * NUM_BOOT_ENTRY;
 		printf("Running on cpu %d\n", id);
 		printf("\n");
 		printf("table @ 0x%p\n", table);
 		printf("   addr - 0x%08x\n", table[BOOT_ENTRY_ADDR_LOWER]);
 		printf("   pir  - 0x%08x\n", table[BOOT_ENTRY_PIR]);
 		printf("   r3   - 0x%08x\n", table[BOOT_ENTRY_R3_LOWER]);
 		printf("   r6   - 0x%08x\n", table[BOOT_ENTRY_R6_LOWER]);
 	}

 	return 0;
 }

 #ifdef CONFIG_FSL_CORENET
 int cpu_disable(int nr)
 {
 	volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);

 	setbits_be32(&gur->coredisrl, 1 << nr);

 	return 0;
 }

 int is_core_disabled(int nr) {
 	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 	u32 coredisrl = in_be32(&gur->coredisrl);

 	return (coredisrl & (1 << nr));
 }
 #else
 int cpu_disable(int nr)
 {
 	volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);

 	switch (nr) {
 	case 0:
 		setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU0);
 		break;
 	case 1:
 		setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU1);
 		break;
 	default:
 		printf("Invalid cpu number for disable %d\n", nr);
 		return 1;
 	}

 	return 0;
 }

 int is_core_disabled(int nr) {
 	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 	u32 devdisr = in_be32(&gur->devdisr);

 	switch (nr) {
 	case 0:
 		return (devdisr & MPC85xx_DEVDISR_CPU0);
 	case 1:
 		return (devdisr & MPC85xx_DEVDISR_CPU1);
 	default:
 		printf("Invalid cpu number for disable %d\n", nr);
 	}

 	return 0;
 }
 #endif

 static u8 boot_entry_map[4] = {
 	0,
 	BOOT_ENTRY_PIR,
 	BOOT_ENTRY_R3_LOWER,
 	BOOT_ENTRY_R6_LOWER,
 };

 int cpu_release(int nr, int argc, char * const argv[])
 {
 	u32 i, val, *table = (u32 *)get_spin_virt_addr() + nr * NUM_BOOT_ENTRY;
 	u64 boot_addr;

 	if (nr == get_my_id()) {
 		printf("Invalid to release the boot core.\n\n");
 		return 1;
 	}

 	if (argc != 4) {
 		printf("Invalid number of arguments to release.\n\n");
 		return 1;
 	}

 	boot_addr = simple_strtoull(argv[0], NULL, 16);

 	/* handle pir, r3, r6 */
 	for (i = 1; i < 4; i++) {
 		if (argv[i][0] != '-') {
 			u8 entry = boot_entry_map[i];
 			val = simple_strtoul(argv[i], NULL, 16);
 			table[entry] = val;
 		}
 	}

 	table[BOOT_ENTRY_ADDR_UPPER] = (u32)(boot_addr >> 32);

 	/* ensure all table updates complete before final address write */
 	eieio();

 	table[BOOT_ENTRY_ADDR_LOWER] = (u32)(boot_addr & 0xffffffff);

 	return 0;
 }

 u32 determine_mp_bootpg(void)
 {
 	/* if we have 4G or more of memory, put the boot page at 4Gb-4k */
 	if ((u64)gd->ram_size > 0xfffff000)
 		return (0xfffff000);

 	return (gd->ram_size - 4096);
 }

 ulong get_spin_phys_addr(void)
 {
 	extern ulong __secondary_start_page;
 	extern ulong __spin_table;

 	return (determine_mp_bootpg() +
 		(ulong)&__spin_table - (ulong)&__secondary_start_page);
 }

 ulong get_spin_virt_addr(void)
 {
 	extern ulong __secondary_start_page;
 	extern ulong __spin_table;

 	return (CONFIG_BPTR_VIRT_ADDR +
 		(ulong)&__spin_table - (ulong)&__secondary_start_page);
 }

 #ifdef CONFIG_FSL_CORENET
 static void plat_mp_up(unsigned long bootpg)
 {
 	u32 up, cpu_up_mask, whoami;
 	u32 *table = (u32 *)get_spin_virt_addr();
 	volatile ccsr_gur_t *gur;
 	volatile ccsr_local_t *ccm;
 	volatile ccsr_rcpm_t *rcpm;
 	volatile ccsr_pic_t *pic;
 	int timeout = 10;
 	u32 nr_cpus;
 	struct law_entry e;

 	gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 	ccm = (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR);
 	rcpm = (void *)(CONFIG_SYS_FSL_CORENET_RCPM_ADDR);
 	pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR);

 	nr_cpus = ((in_be32(&pic->frr) >> 8) & 0xff) + 1;

 	whoami = in_be32(&pic->whoami);
 	cpu_up_mask = 1 << whoami;
 	out_be32(&ccm->bstrl, bootpg);

 	e = find_law(bootpg);
 	out_be32(&ccm->bstrar, LAW_EN | e.trgt_id << 20 | LAW_SIZE_4K);

 	/* readback to sync write */
 	in_be32(&ccm->bstrar);

 	/* disable time base at the platform */
 	out_be32(&rcpm->ctbenrl, cpu_up_mask);

 	/* release the hounds */
 	up = ((1 << nr_cpus) - 1);
 	out_be32(&gur->brrl, up);

 	/* wait for everyone */
 	while (timeout) {
 		int i;
 		for (i = 0; i < nr_cpus; i++) {
 			if (table[i * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
 				cpu_up_mask |= (1 << i);
 		};

 		if ((cpu_up_mask & up) == up)
 			break;

 		udelay(100);
 		timeout--;
 	}

 	if (timeout == 0)
 		printf("CPU up timeout. CPU up mask is %x should be %x\n",
 			cpu_up_mask, up);

 	/* enable time base at the platform */
 	out_be32(&rcpm->ctbenrl, 0);
 	mtspr(SPRN_TBWU, 0);
 	mtspr(SPRN_TBWL, 0);
 	out_be32(&rcpm->ctbenrl, (1 << nr_cpus) - 1);

 #ifdef CONFIG_MPC8xxx_DISABLE_BPTR
 	/*
 	 * Disabling Boot Page Translation allows the memory region 0xfffff000
 	 * to 0xffffffff to be used normally.  Leaving Boot Page Translation
 	 * enabled remaps 0xfffff000 to SDRAM which makes that memory region
 	 * unusable for normal operation but it does allow OSes to easily
 	 * reset a processor core to put it back into U-Boot's spinloop.
 	 */
 	clrbits_be32(&ecm->bptr, 0x80000000);
 #endif
 }
 #else
 static void plat_mp_up(unsigned long bootpg)
 {
 	u32 up, cpu_up_mask, whoami;
 	u32 *table = (u32 *)get_spin_virt_addr();
 	volatile u32 bpcr;
 	volatile ccsr_local_ecm_t *ecm = (void *)(CONFIG_SYS_MPC85xx_ECM_ADDR);
 	volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 	volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR);
 	u32 devdisr;
 	int timeout = 10;

 	whoami = in_be32(&pic->whoami);
 	out_be32(&ecm->bptr, 0x80000000 | (bootpg >> 12));

 	/* disable time base at the platform */
 	devdisr = in_be32(&gur->devdisr);
 	if (whoami)
 		devdisr |= MPC85xx_DEVDISR_TB0;
 	else
 		devdisr |= MPC85xx_DEVDISR_TB1;
 	out_be32(&gur->devdisr, devdisr);

 	/* release the hounds */
 	up = ((1 << cpu_numcores()) - 1);
 	bpcr = in_be32(&ecm->eebpcr);
 	bpcr |= (up << 24);
 	out_be32(&ecm->eebpcr, bpcr);
 	asm("sync; isync; msync");

 	cpu_up_mask = 1 << whoami;
 	/* wait for everyone */
 	while (timeout) {
 		int i;
 		for (i = 0; i < cpu_numcores(); i++) {
 			if (table[i * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
 				cpu_up_mask |= (1 << i);
 		};

 		if ((cpu_up_mask & up) == up)
 			break;

 		udelay(100);
 		timeout--;
 	}

 	if (timeout == 0)
 		printf("CPU up timeout. CPU up mask is %x should be %x\n",
 			cpu_up_mask, up);

 	/* enable time base at the platform */
 	if (whoami)
 		devdisr |= MPC85xx_DEVDISR_TB1;
 	else
 		devdisr |= MPC85xx_DEVDISR_TB0;
 	out_be32(&gur->devdisr, devdisr);
 	mtspr(SPRN_TBWU, 0);
 	mtspr(SPRN_TBWL, 0);

 	devdisr &= ~(MPC85xx_DEVDISR_TB0 | MPC85xx_DEVDISR_TB1);
 	out_be32(&gur->devdisr, devdisr);

 #ifdef CONFIG_MPC8xxx_DISABLE_BPTR
 	/*
 	 * Disabling Boot Page Translation allows the memory region 0xfffff000
 	 * to 0xffffffff to be used normally.  Leaving Boot Page Translation
 	 * enabled remaps 0xfffff000 to SDRAM which makes that memory region
 	 * unusable for normal operation but it does allow OSes to easily
 	 * reset a processor core to put it back into U-Boot's spinloop.
 	 */
 	clrbits_be32(&ecm->bptr, 0x80000000);
 #endif
 }
 #endif

 void cpu_mp_lmb_reserve(struct lmb *lmb)
 {
 	u32 bootpg = determine_mp_bootpg();

 	lmb_reserve(lmb, bootpg, 4096);
 }

 void setup_mp(void)
 {
 	extern ulong __secondary_start_page;
 	extern ulong __bootpg_addr;
 	ulong fixup = (ulong)&__secondary_start_page;
 	u32 bootpg = determine_mp_bootpg();

 	/* Store the bootpg's SDRAM address for use by secondary CPU cores */
 	__bootpg_addr = bootpg;

 	/* look for the tlb covering the reset page, there better be one */
 	int i = find_tlb_idx((void *)CONFIG_BPTR_VIRT_ADDR, 1);

 	/* we found a match */
 	if (i != -1) {
 		/* map reset page to bootpg so we can copy code there */
 		disable_tlb(i);

 		set_tlb(1, CONFIG_BPTR_VIRT_ADDR, bootpg, /* tlb, epn, rpn */
 			MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G, /* perms, wimge */
 			0, i, BOOKE_PAGESZ_4K, 1); /* ts, esel, tsize, iprot */

 		memcpy((void *)CONFIG_BPTR_VIRT_ADDR, (void *)fixup, 4096);

 		plat_mp_up(bootpg);
 	} else {
 		puts("WARNING: No reset page TLB. "
 			"Skipping secondary core setup\n");
 	}
 }
	/*
	* Copyright 2008-2010 Freescale Semiconductor, 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 <common.h>
	#include <asm/processor.h>
	#include <ioports.h>
	#include <lmb.h>
	#include <asm/io.h>
	#include <asm/mmu.h>
	#include <asm/fsl_law.h>
	#include "mp.h"

	DECLARE_GLOBAL_DATA_PTR;

	u32 get_my_id()
	{
	return mfspr(SPRN_PIR);
	}

	int cpu_reset(int nr)
	{
	volatile ccsr_pic_t pic = (void )(CONFIG_SYS_MPC85xx_PIC_ADDR);
	out_be32(&pic->pir, 1 << nr);
	/* the dummy read works around an errata on early 85xx MP PICs */
	(void)in_be32(&pic->pir);
	out_be32(&pic->pir, 0x0);

	return 0;
	}

	int cpu_status(int nr)
	{
	u32 *table, id = get_my_id();

	if (nr == id) {
	table = (u32 *)get_spin_virt_addr();
	printf("table base @ 0x%p\n", table);
	} else {
	table = (u32 )get_spin_virt_addr() + nr NUM_BOOT_ENTRY;
	printf("Running on cpu %d\n", id);
	printf("\n");
	printf("table @ 0x%p\n", table);
	printf(" addr - 0x%08x\n", table[BOOT_ENTRY_ADDR_LOWER]);
	printf(" pir - 0x%08x\n", table[BOOT_ENTRY_PIR]);
	printf(" r3 - 0x%08x\n", table[BOOT_ENTRY_R3_LOWER]);
	printf(" r6 - 0x%08x\n", table[BOOT_ENTRY_R6_LOWER]);
	}

	return 0;
	}

	#ifdef CONFIG_FSL_CORENET
	int cpu_disable(int nr)
	{
	volatile ccsr_gur_t gur = (void )(CONFIG_SYS_MPC85xx_GUTS_ADDR);

	setbits_be32(&gur->coredisrl, 1 << nr);

	return 0;
	}

	int is_core_disabled(int nr) {
	ccsr_gur_t gur = (void )(CONFIG_SYS_MPC85xx_GUTS_ADDR);
	u32 coredisrl = in_be32(&gur->coredisrl);

	return (coredisrl & (1 << nr));
	}
	#else
	int cpu_disable(int nr)
	{
	volatile ccsr_gur_t gur = (void )(CONFIG_SYS_MPC85xx_GUTS_ADDR);

	switch (nr) {
	case 0:
	setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU0);
	break;
	case 1:
	setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU1);
	break;
	default:
	printf("Invalid cpu number for disable %d\n", nr);
	return 1;
	}

	return 0;
	}

	int is_core_disabled(int nr) {
	ccsr_gur_t gur = (void )(CONFIG_SYS_MPC85xx_GUTS_ADDR);
	u32 devdisr = in_be32(&gur->devdisr);

	switch (nr) {
	case 0:
	return (devdisr & MPC85xx_DEVDISR_CPU0);
	case 1:
	return (devdisr & MPC85xx_DEVDISR_CPU1);
	default:
	printf("Invalid cpu number for disable %d\n", nr);
	}

	return 0;
	}
	#endif

	static u8 boot_entry_map[4] = {
	0,
	BOOT_ENTRY_PIR,
	BOOT_ENTRY_R3_LOWER,
	BOOT_ENTRY_R6_LOWER,
	};

	int cpu_release(int nr, int argc, char * const argv[])
	{
	u32 i, val, table = (u32 )get_spin_virt_addr() + nr * NUM_BOOT_ENTRY;
	u64 boot_addr;

	if (nr == get_my_id()) {
	printf("Invalid to release the boot core.\n\n");
	return 1;
	}

	if (argc != 4) {
	printf("Invalid number of arguments to release.\n\n");
	return 1;
	}

	boot_addr = simple_strtoull(argv[0], NULL, 16);

	/* handle pir, r3, r6 */
	for (i = 1; i < 4; i++) {
	if (argv[i][0] != '-') {
	u8 entry = boot_entry_map[i];
	val = simple_strtoul(argv[i], NULL, 16);
	table[entry] = val;
	}
	}

	table[BOOT_ENTRY_ADDR_UPPER] = (u32)(boot_addr >> 32);

	/* ensure all table updates complete before final address write */
	eieio();

	table[BOOT_ENTRY_ADDR_LOWER] = (u32)(boot_addr & 0xffffffff);

	return 0;
	}

	u32 determine_mp_bootpg(void)
	{
	/* if we have 4G or more of memory, put the boot page at 4Gb-4k */
	if ((u64)gd->ram_size > 0xfffff000)
	return (0xfffff000);

	return (gd->ram_size - 4096);
	}

	ulong get_spin_phys_addr(void)
	{
	extern ulong __secondary_start_page;
	extern ulong __spin_table;

	return (determine_mp_bootpg() +
	(ulong)&__spin_table - (ulong)&__secondary_start_page);
	}

	ulong get_spin_virt_addr(void)
	{
	extern ulong __secondary_start_page;
	extern ulong __spin_table;

	return (CONFIG_BPTR_VIRT_ADDR +
	(ulong)&__spin_table - (ulong)&__secondary_start_page);
	}

	#ifdef CONFIG_FSL_CORENET
	static void plat_mp_up(unsigned long bootpg)
	{
	u32 up, cpu_up_mask, whoami;
	u32 table = (u32 )get_spin_virt_addr();
	volatile ccsr_gur_t *gur;
	volatile ccsr_local_t *ccm;
	volatile ccsr_rcpm_t *rcpm;
	volatile ccsr_pic_t *pic;
	int timeout = 10;
	u32 nr_cpus;
	struct law_entry e;

	gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
	ccm = (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR);
	rcpm = (void *)(CONFIG_SYS_FSL_CORENET_RCPM_ADDR);
	pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR);

	nr_cpus = ((in_be32(&pic->frr) >> 8) & 0xff) + 1;

	whoami = in_be32(&pic->whoami);
	cpu_up_mask = 1 << whoami;
	out_be32(&ccm->bstrl, bootpg);

	e = find_law(bootpg);
	out_be32(&ccm->bstrar, LAW_EN \| e.trgt_id << 20 \| LAW_SIZE_4K);

	/* readback to sync write */
	in_be32(&ccm->bstrar);

	/* disable time base at the platform */
	out_be32(&rcpm->ctbenrl, cpu_up_mask);

	/* release the hounds */
	up = ((1 << nr_cpus) - 1);
	out_be32(&gur->brrl, up);

	/* wait for everyone */
	while (timeout) {
	int i;
	for (i = 0; i < nr_cpus; i++) {
	if (table[i * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
	cpu_up_mask \|= (1 << i);
	};

	if ((cpu_up_mask & up) == up)
	break;

	udelay(100);
	timeout--;
	}

	if (timeout == 0)
	printf("CPU up timeout. CPU up mask is %x should be %x\n",
	cpu_up_mask, up);

	/* enable time base at the platform */
	out_be32(&rcpm->ctbenrl, 0);
	mtspr(SPRN_TBWU, 0);
	mtspr(SPRN_TBWL, 0);
	out_be32(&rcpm->ctbenrl, (1 << nr_cpus) - 1);

	#ifdef CONFIG_MPC8xxx_DISABLE_BPTR
	/*
	* Disabling Boot Page Translation allows the memory region 0xfffff000
	* to 0xffffffff to be used normally. Leaving Boot Page Translation
	* enabled remaps 0xfffff000 to SDRAM which makes that memory region
	* unusable for normal operation but it does allow OSes to easily
	* reset a processor core to put it back into U-Boot's spinloop.
	*/
	clrbits_be32(&ecm->bptr, 0x80000000);
	#endif
	}
	#else
	static void plat_mp_up(unsigned long bootpg)
	{
	u32 up, cpu_up_mask, whoami;
	u32 table = (u32 )get_spin_virt_addr();
	volatile u32 bpcr;
	volatile ccsr_local_ecm_t ecm = (void )(CONFIG_SYS_MPC85xx_ECM_ADDR);
	volatile ccsr_gur_t gur = (void )(CONFIG_SYS_MPC85xx_GUTS_ADDR);
	volatile ccsr_pic_t pic = (void )(CONFIG_SYS_MPC85xx_PIC_ADDR);
	u32 devdisr;
	int timeout = 10;

	whoami = in_be32(&pic->whoami);
	out_be32(&ecm->bptr, 0x80000000 \| (bootpg >> 12));

	/* disable time base at the platform */
	devdisr = in_be32(&gur->devdisr);
	if (whoami)
	devdisr \|= MPC85xx_DEVDISR_TB0;
	else
	devdisr \|= MPC85xx_DEVDISR_TB1;
	out_be32(&gur->devdisr, devdisr);

	/* release the hounds */
	up = ((1 << cpu_numcores()) - 1);
	bpcr = in_be32(&ecm->eebpcr);
	bpcr \|= (up << 24);
	out_be32(&ecm->eebpcr, bpcr);
	asm("sync; isync; msync");

	cpu_up_mask = 1 << whoami;
	/* wait for everyone */
	while (timeout) {
	int i;
	for (i = 0; i < cpu_numcores(); i++) {
	if (table[i * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
	cpu_up_mask \|= (1 << i);
	};

	if ((cpu_up_mask & up) == up)
	break;

	udelay(100);
	timeout--;
	}

	if (timeout == 0)
	printf("CPU up timeout. CPU up mask is %x should be %x\n",
	cpu_up_mask, up);

	/* enable time base at the platform */
	if (whoami)
	devdisr \|= MPC85xx_DEVDISR_TB1;
	else
	devdisr \|= MPC85xx_DEVDISR_TB0;
	out_be32(&gur->devdisr, devdisr);
	mtspr(SPRN_TBWU, 0);
	mtspr(SPRN_TBWL, 0);

	devdisr &= ~(MPC85xx_DEVDISR_TB0 \| MPC85xx_DEVDISR_TB1);
	out_be32(&gur->devdisr, devdisr);

	#ifdef CONFIG_MPC8xxx_DISABLE_BPTR
	/*
	* Disabling Boot Page Translation allows the memory region 0xfffff000
	* to 0xffffffff to be used normally. Leaving Boot Page Translation
	* enabled remaps 0xfffff000 to SDRAM which makes that memory region
	* unusable for normal operation but it does allow OSes to easily
	* reset a processor core to put it back into U-Boot's spinloop.
	*/
	clrbits_be32(&ecm->bptr, 0x80000000);
	#endif
	}
	#endif

	void cpu_mp_lmb_reserve(struct lmb *lmb)
	{
	u32 bootpg = determine_mp_bootpg();

	lmb_reserve(lmb, bootpg, 4096);
	}

	void setup_mp(void)
	{
	extern ulong __secondary_start_page;
	extern ulong __bootpg_addr;
	ulong fixup = (ulong)&__secondary_start_page;
	u32 bootpg = determine_mp_bootpg();

	/* Store the bootpg's SDRAM address for use by secondary CPU cores */
	__bootpg_addr = bootpg;

	/* look for the tlb covering the reset page, there better be one */
	int i = find_tlb_idx((void *)CONFIG_BPTR_VIRT_ADDR, 1);

	/* we found a match */
	if (i != -1) {
	/* map reset page to bootpg so we can copy code there */
	disable_tlb(i);

	set_tlb(1, CONFIG_BPTR_VIRT_ADDR, bootpg, /* tlb, epn, rpn */
	MAS3_SX\|MAS3_SW\|MAS3_SR, MAS2_I\|MAS2_G, /* perms, wimge */
	0, i, BOOKE_PAGESZ_4K, 1); /* ts, esel, tsize, iprot */

	memcpy((void )CONFIG_BPTR_VIRT_ADDR, (void )fixup, 4096);

	plat_mp_up(bootpg);
	} else {
	puts("WARNING: No reset page TLB. "
	"Skipping secondary core setup\n");
	}
	}