cpu/mpc83xx/cpu.c - filogic/uboot - Gitiles

 /*
  * Copyright (C) 2004-2007 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
  */

 /*
  * CPU specific code for the MPC83xx family.
  *
  * Derived from the MPC8260 and MPC85xx.
  */

 #include <common.h>
 #include <watchdog.h>
 #include <command.h>
 #include <mpc83xx.h>
 #include <asm/processor.h>
 #include <libfdt.h>

 DECLARE_GLOBAL_DATA_PTR;

 int checkcpu(void)
 {
 	volatile immap_t *immr;
 	ulong clock = gd->cpu_clk;
 	u32 pvr = get_pvr();
 	u32 spridr;
 	char buf[32];
 	int i;

 	const struct cpu_type {
 		char name[15];
 		u32 partid;
 	} cpu_type_list [] = {
 		CPU_TYPE_ENTRY(8311),
 		CPU_TYPE_ENTRY(8313),
 		CPU_TYPE_ENTRY(8314),
 		CPU_TYPE_ENTRY(8315),
 		CPU_TYPE_ENTRY(8321),
 		CPU_TYPE_ENTRY(8323),
 		CPU_TYPE_ENTRY(8343),
 		CPU_TYPE_ENTRY(8347_TBGA_),
 		CPU_TYPE_ENTRY(8347_PBGA_),
 		CPU_TYPE_ENTRY(8349),
 		CPU_TYPE_ENTRY(8358_TBGA_),
 		CPU_TYPE_ENTRY(8358_PBGA_),
 		CPU_TYPE_ENTRY(8360),
 		CPU_TYPE_ENTRY(8377),
 		CPU_TYPE_ENTRY(8378),
 		CPU_TYPE_ENTRY(8379),
 	};

 	immr = (immap_t *)CFG_IMMR;

 	puts("CPU:   ");

 	switch (pvr & 0xffff0000) {
 		case PVR_E300C1:
 			printf("e300c1, ");
 			break;

 		case PVR_E300C2:
 			printf("e300c2, ");
 			break;

 		case PVR_E300C3:
 			printf("e300c3, ");
 			break;

 		case PVR_E300C4:
 			printf("e300c4, ");
 			break;

 		default:
 			printf("Unknown core, ");
 	}

 	spridr = immr->sysconf.spridr;

 	for (i = 0; i < ARRAY_SIZE(cpu_type_list); i++)
 		if (cpu_type_list[i].partid == PARTID_NO_E(spridr)) {
 			puts("MPC");
 			puts(cpu_type_list[i].name);
 			if (IS_E_PROCESSOR(spridr))
 				puts("E");
 			if (REVID_MAJOR(spridr) >= 2)
 				puts("A");
 			printf(", Rev: %d.%d", REVID_MAJOR(spridr),
 			       REVID_MINOR(spridr));
 			break;
 		}

 	if (i == ARRAY_SIZE(cpu_type_list))
 		printf("(SPRIDR %08x unknown), ", spridr);

 	printf(" at %s MHz, ", strmhz(buf, clock));

 	printf("CSB: %s MHz\n", strmhz(buf, gd->csb_clk));

 	return 0;
 }


 /*
  * Program a UPM with the code supplied in the table.
  *
  * The 'dummy' variable is used to increment the MAD. 'dummy' is
  * supposed to be a pointer to the memory of the device being
  * programmed by the UPM.  The data in the MDR is written into
  * memory and the MAD is incremented every time there's a read
  * from 'dummy'. Unfortunately, the current prototype for this
  * function doesn't allow for passing the address of this
  * device, and changing the prototype will break a number lots
  * of other code, so we need to use a round-about way of finding
  * the value for 'dummy'.
  *
  * The value can be extracted from the base address bits of the
  * Base Register (BR) associated with the specific UPM.  To find
  * that BR, we need to scan all 8 BRs until we find the one that
  * has its MSEL bits matching the UPM we want.  Once we know the
  * right BR, we can extract the base address bits from it.
  *
  * The MxMR and the BR and OR of the chosen bank should all be
  * configured before calling this function.
  *
  * Parameters:
  * upm: 0=UPMA, 1=UPMB, 2=UPMC
  * table: Pointer to an array of values to program
  * size: Number of elements in the array.  Must be 64 or less.
  */
 void upmconfig (uint upm, uint *table, uint size)
 {
 #if defined(CONFIG_MPC834X)
 	volatile immap_t *immap = (immap_t *) CFG_IMMR;
 	volatile lbus83xx_t *lbus = &immap->lbus;
 	volatile uchar *dummy = NULL;
 	const u32 msel = (upm + 4) << BR_MSEL_SHIFT;	/* What the MSEL field in BRn should be */
 	volatile u32 *mxmr = &lbus->mamr + upm;	/* Pointer to mamr, mbmr, or mcmr */
 	uint i;

 	/* Scan all the banks to determine the base address of the device */
 	for (i = 0; i < 8; i++) {
 		if ((lbus->bank[i].br & BR_MSEL) == msel) {
 			dummy = (uchar *) (lbus->bank[i].br & BR_BA);
 			break;
 		}
 	}

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

 	/* Set the OP field in the MxMR to "write" and the MAD field to 000000 */
 	*mxmr = (*mxmr & 0xCFFFFFC0) | 0x10000000;

 	for (i = 0; i < size; i++) {
 		lbus->mdr = table[i];
 		__asm__ __volatile__ ("sync");
 		*dummy;	/* Write the value to memory and increment MAD */
 		__asm__ __volatile__ ("sync");
 	}

 	/* Set the OP field in the MxMR to "normal" and the MAD field to 000000 */
 	*mxmr &= 0xCFFFFFC0;
 #else
 	printf("Error: %s() not defined for this configuration.\n", __FUNCTION__);
 	hang();
 #endif
 }


 int
 do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 {
 	ulong msr;
 #ifndef MPC83xx_RESET
 	ulong addr;
 #endif

 	volatile immap_t *immap = (immap_t *) CFG_IMMR;

 #ifdef MPC83xx_RESET
 	/* Interrupts and MMU off */
 	__asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);

 	msr &= ~( MSR_EE | MSR_IR | MSR_DR);
 	__asm__ __volatile__ ("mtmsr    %0"::"r" (msr));

 	/* enable Reset Control Reg */
 	immap->reset.rpr = 0x52535445;
 	__asm__ __volatile__ ("sync");
 	__asm__ __volatile__ ("isync");

 	/* confirm Reset Control Reg is enabled */
 	while(!((immap->reset.rcer) & RCER_CRE));

 	printf("Resetting the board.");
 	printf("\n");

 	udelay(200);

 	/* perform reset, only one bit */
 	immap->reset.rcr = RCR_SWHR;

 #else	/* ! MPC83xx_RESET */

 	immap->reset.rmr = RMR_CSRE;    /* Checkstop Reset enable */

 	/* Interrupts and MMU off */
 	__asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);

 	msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
 	__asm__ __volatile__ ("mtmsr    %0"::"r" (msr));

 	/*
 	 * Trying to execute the next instruction at a non-existing address
 	 * should cause a machine check, resulting in reset
 	 */
 	addr = CFG_RESET_ADDRESS;

 	printf("resetting the board.");
 	printf("\n");
 	((void (*)(void)) addr) ();
 #endif	/* MPC83xx_RESET */

 	return 1;
 }


 /*
  * Get timebase clock frequency (like cpu_clk in Hz)
  */

 unsigned long get_tbclk(void)
 {
 	ulong tbclk;

 	tbclk = (gd->bus_clk + 3L) / 4L;

 	return tbclk;
 }


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

 	/* Reset the 83xx watchdog */
 	volatile immap_t *immr = (immap_t *) CFG_IMMR;
 	immr->wdt.swsrr = 0x556c;
 	immr->wdt.swsrr = 0xaa39;

 	if (re_enable)
 		enable_interrupts ();
 }
 #endif

 #if defined(CONFIG_DDR_ECC)
 void dma_init(void)
 {
 	volatile immap_t *immap = (immap_t *)CFG_IMMR;
 	volatile dma83xx_t *dma = &immap->dma;
 	volatile u32 status = swab32(dma->dmasr0);
 	volatile u32 dmamr0 = swab32(dma->dmamr0);

 	debug("DMA-init\n");

 	/* initialize DMASARn, DMADAR and DMAABCRn */
 	dma->dmadar0 = (u32)0;
 	dma->dmasar0 = (u32)0;
 	dma->dmabcr0 = 0;

 	__asm__ __volatile__ ("sync");
 	__asm__ __volatile__ ("isync");

 	/* clear CS bit */
 	dmamr0 &= ~DMA_CHANNEL_START;
 	dma->dmamr0 = swab32(dmamr0);
 	__asm__ __volatile__ ("sync");
 	__asm__ __volatile__ ("isync");

 	/* while the channel is busy, spin */
 	while(status & DMA_CHANNEL_BUSY) {
 		status = swab32(dma->dmasr0);
 	}

 	debug("DMA-init end\n");
 }

 uint dma_check(void)
 {
 	volatile immap_t *immap = (immap_t *)CFG_IMMR;
 	volatile dma83xx_t *dma = &immap->dma;
 	volatile u32 status = swab32(dma->dmasr0);
 	volatile u32 byte_count = swab32(dma->dmabcr0);

 	/* while the channel is busy, spin */
 	while (status & DMA_CHANNEL_BUSY) {
 		status = swab32(dma->dmasr0);
 	}

 	if (status & DMA_CHANNEL_TRANSFER_ERROR) {
 		printf ("DMA Error: status = %x @ %d\n", status, byte_count);
 	}

 	return status;
 }

 int dma_xfer(void *dest, u32 count, void *src)
 {
 	volatile immap_t *immap = (immap_t *)CFG_IMMR;
 	volatile dma83xx_t *dma = &immap->dma;
 	volatile u32 dmamr0;

 	/* initialize DMASARn, DMADAR and DMAABCRn */
 	dma->dmadar0 = swab32((u32)dest);
 	dma->dmasar0 = swab32((u32)src);
 	dma->dmabcr0 = swab32(count);

 	__asm__ __volatile__ ("sync");
 	__asm__ __volatile__ ("isync");

 	/* init direct transfer, clear CS bit */
 	dmamr0 = (DMA_CHANNEL_TRANSFER_MODE_DIRECT |
 			DMA_CHANNEL_SOURCE_ADDRESS_HOLD_8B |
 			DMA_CHANNEL_SOURCE_ADRESSS_HOLD_EN);

 	dma->dmamr0 = swab32(dmamr0);

 	__asm__ __volatile__ ("sync");
 	__asm__ __volatile__ ("isync");

 	/* set CS to start DMA transfer */
 	dmamr0 |= DMA_CHANNEL_START;
 	dma->dmamr0 = swab32(dmamr0);
 	__asm__ __volatile__ ("sync");
 	__asm__ __volatile__ ("isync");

 	return ((int)dma_check());
 }
 #endif /*CONFIG_DDR_ECC*/
	/*
	* Copyright (C) 2004-2007 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
	*/

	/*
	* CPU specific code for the MPC83xx family.
	*
	* Derived from the MPC8260 and MPC85xx.
	*/

	#include <common.h>
	#include <watchdog.h>
	#include <command.h>
	#include <mpc83xx.h>
	#include <asm/processor.h>
	#include <libfdt.h>

	DECLARE_GLOBAL_DATA_PTR;

	int checkcpu(void)
	{
	volatile immap_t *immr;
	ulong clock = gd->cpu_clk;
	u32 pvr = get_pvr();
	u32 spridr;
	char buf[32];
	int i;

	const struct cpu_type {
	char name[15];
	u32 partid;
	} cpu_type_list [] = {
	CPU_TYPE_ENTRY(8311),
	CPU_TYPE_ENTRY(8313),
	CPU_TYPE_ENTRY(8314),
	CPU_TYPE_ENTRY(8315),
	CPU_TYPE_ENTRY(8321),
	CPU_TYPE_ENTRY(8323),
	CPU_TYPE_ENTRY(8343),
	CPU_TYPE_ENTRY(8347_TBGA_),
	CPU_TYPE_ENTRY(8347_PBGA_),
	CPU_TYPE_ENTRY(8349),
	CPU_TYPE_ENTRY(8358_TBGA_),
	CPU_TYPE_ENTRY(8358_PBGA_),
	CPU_TYPE_ENTRY(8360),
	CPU_TYPE_ENTRY(8377),
	CPU_TYPE_ENTRY(8378),
	CPU_TYPE_ENTRY(8379),
	};

	immr = (immap_t *)CFG_IMMR;

	puts("CPU: ");

	switch (pvr & 0xffff0000) {
	case PVR_E300C1:
	printf("e300c1, ");
	break;

	case PVR_E300C2:
	printf("e300c2, ");
	break;

	case PVR_E300C3:
	printf("e300c3, ");
	break;

	case PVR_E300C4:
	printf("e300c4, ");
	break;

	default:
	printf("Unknown core, ");
	}

	spridr = immr->sysconf.spridr;

	for (i = 0; i < ARRAY_SIZE(cpu_type_list); i++)
	if (cpu_type_list[i].partid == PARTID_NO_E(spridr)) {
	puts("MPC");
	puts(cpu_type_list[i].name);
	if (IS_E_PROCESSOR(spridr))
	puts("E");
	if (REVID_MAJOR(spridr) >= 2)
	puts("A");
	printf(", Rev: %d.%d", REVID_MAJOR(spridr),
	REVID_MINOR(spridr));
	break;
	}

	if (i == ARRAY_SIZE(cpu_type_list))
	printf("(SPRIDR %08x unknown), ", spridr);

	printf(" at %s MHz, ", strmhz(buf, clock));

	printf("CSB: %s MHz\n", strmhz(buf, gd->csb_clk));

	return 0;
	}


	/*
	* Program a UPM with the code supplied in the table.
	*
	* The 'dummy' variable is used to increment the MAD. 'dummy' is
	* supposed to be a pointer to the memory of the device being
	* programmed by the UPM. The data in the MDR is written into
	* memory and the MAD is incremented every time there's a read
	* from 'dummy'. Unfortunately, the current prototype for this
	* function doesn't allow for passing the address of this
	* device, and changing the prototype will break a number lots
	* of other code, so we need to use a round-about way of finding
	* the value for 'dummy'.
	*
	* The value can be extracted from the base address bits of the
	* Base Register (BR) associated with the specific UPM. To find
	* that BR, we need to scan all 8 BRs until we find the one that
	* has its MSEL bits matching the UPM we want. Once we know the
	* right BR, we can extract the base address bits from it.
	*
	* The MxMR and the BR and OR of the chosen bank should all be
	* configured before calling this function.
	*
	* Parameters:
	* upm: 0=UPMA, 1=UPMB, 2=UPMC
	* table: Pointer to an array of values to program
	* size: Number of elements in the array. Must be 64 or less.
	*/
	void upmconfig (uint upm, uint *table, uint size)
	{
	#if defined(CONFIG_MPC834X)
	volatile immap_t immap = (immap_t ) CFG_IMMR;
	volatile lbus83xx_t *lbus = &immap->lbus;
	volatile uchar *dummy = NULL;
	const u32 msel = (upm + 4) << BR_MSEL_SHIFT; /* What the MSEL field in BRn should be */
	volatile u32 mxmr = &lbus->mamr + upm; / Pointer to mamr, mbmr, or mcmr */
	uint i;

	/* Scan all the banks to determine the base address of the device */
	for (i = 0; i < 8; i++) {
	if ((lbus->bank[i].br & BR_MSEL) == msel) {
	dummy = (uchar *) (lbus->bank[i].br & BR_BA);
	break;
	}
	}

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

	/* Set the OP field in the MxMR to "write" and the MAD field to 000000 */
	mxmr = (mxmr & 0xCFFFFFC0) \| 0x10000000;

	for (i = 0; i < size; i++) {
	lbus->mdr = table[i];
	__asm__ __volatile__ ("sync");
	dummy; / Write the value to memory and increment MAD */
	__asm__ __volatile__ ("sync");
	}

	/* Set the OP field in the MxMR to "normal" and the MAD field to 000000 */
	*mxmr &= 0xCFFFFFC0;
	#else
	printf("Error: %s() not defined for this configuration.\n", __FUNCTION__);
	hang();
	#endif
	}


	int
	do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
	{
	ulong msr;
	#ifndef MPC83xx_RESET
	ulong addr;
	#endif

	volatile immap_t immap = (immap_t ) CFG_IMMR;

	#ifdef MPC83xx_RESET
	/* Interrupts and MMU off */
	__asm__ __volatile__ ("mfmsr %0":"=r" (msr):);

	msr &= ~( MSR_EE \| MSR_IR \| MSR_DR);
	__asm__ __volatile__ ("mtmsr %0"::"r" (msr));

	/* enable Reset Control Reg */
	immap->reset.rpr = 0x52535445;
	__asm__ __volatile__ ("sync");
	__asm__ __volatile__ ("isync");

	/* confirm Reset Control Reg is enabled */
	while(!((immap->reset.rcer) & RCER_CRE));

	printf("Resetting the board.");
	printf("\n");

	udelay(200);

	/* perform reset, only one bit */
	immap->reset.rcr = RCR_SWHR;

	#else /* ! MPC83xx_RESET */

	immap->reset.rmr = RMR_CSRE; /* Checkstop Reset enable */

	/* Interrupts and MMU off */
	__asm__ __volatile__ ("mfmsr %0":"=r" (msr):);

	msr &= ~(MSR_ME \| MSR_EE \| MSR_IR \| MSR_DR);
	__asm__ __volatile__ ("mtmsr %0"::"r" (msr));

	/*
	* Trying to execute the next instruction at a non-existing address
	* should cause a machine check, resulting in reset
	*/
	addr = CFG_RESET_ADDRESS;

	printf("resetting the board.");
	printf("\n");
	((void (*)(void)) addr) ();
	#endif /* MPC83xx_RESET */

	return 1;
	}


	/*
	* Get timebase clock frequency (like cpu_clk in Hz)
	*/

	unsigned long get_tbclk(void)
	{
	ulong tbclk;

	tbclk = (gd->bus_clk + 3L) / 4L;

	return tbclk;
	}


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

	/* Reset the 83xx watchdog */
	volatile immap_t immr = (immap_t ) CFG_IMMR;
	immr->wdt.swsrr = 0x556c;
	immr->wdt.swsrr = 0xaa39;

	if (re_enable)
	enable_interrupts ();
	}
	#endif

	#if defined(CONFIG_DDR_ECC)
	void dma_init(void)
	{
	volatile immap_t immap = (immap_t )CFG_IMMR;
	volatile dma83xx_t *dma = &immap->dma;
	volatile u32 status = swab32(dma->dmasr0);
	volatile u32 dmamr0 = swab32(dma->dmamr0);

	debug("DMA-init\n");

	/* initialize DMASARn, DMADAR and DMAABCRn */
	dma->dmadar0 = (u32)0;
	dma->dmasar0 = (u32)0;
	dma->dmabcr0 = 0;

	__asm__ __volatile__ ("sync");
	__asm__ __volatile__ ("isync");

	/* clear CS bit */
	dmamr0 &= ~DMA_CHANNEL_START;
	dma->dmamr0 = swab32(dmamr0);
	__asm__ __volatile__ ("sync");
	__asm__ __volatile__ ("isync");

	/* while the channel is busy, spin */
	while(status & DMA_CHANNEL_BUSY) {
	status = swab32(dma->dmasr0);
	}

	debug("DMA-init end\n");
	}

	uint dma_check(void)
	{
	volatile immap_t immap = (immap_t )CFG_IMMR;
	volatile dma83xx_t *dma = &immap->dma;
	volatile u32 status = swab32(dma->dmasr0);
	volatile u32 byte_count = swab32(dma->dmabcr0);

	/* while the channel is busy, spin */
	while (status & DMA_CHANNEL_BUSY) {
	status = swab32(dma->dmasr0);
	}

	if (status & DMA_CHANNEL_TRANSFER_ERROR) {
	printf ("DMA Error: status = %x @ %d\n", status, byte_count);
	}

	return status;
	}

	int dma_xfer(void dest, u32 count, void src)
	{
	volatile immap_t immap = (immap_t )CFG_IMMR;
	volatile dma83xx_t *dma = &immap->dma;
	volatile u32 dmamr0;

	/* initialize DMASARn, DMADAR and DMAABCRn */
	dma->dmadar0 = swab32((u32)dest);
	dma->dmasar0 = swab32((u32)src);
	dma->dmabcr0 = swab32(count);

	__asm__ __volatile__ ("sync");
	__asm__ __volatile__ ("isync");

	/* init direct transfer, clear CS bit */
	dmamr0 = (DMA_CHANNEL_TRANSFER_MODE_DIRECT \|
	DMA_CHANNEL_SOURCE_ADDRESS_HOLD_8B \|
	DMA_CHANNEL_SOURCE_ADRESSS_HOLD_EN);

	dma->dmamr0 = swab32(dmamr0);

	__asm__ __volatile__ ("sync");
	__asm__ __volatile__ ("isync");

	/* set CS to start DMA transfer */
	dmamr0 \|= DMA_CHANNEL_START;
	dma->dmamr0 = swab32(dmamr0);
	__asm__ __volatile__ ("sync");
	__asm__ __volatile__ ("isync");

	return ((int)dma_check());
	}
	#endif /CONFIG_DDR_ECC/