cpu/mpc8260/cpu_init.c - u-boot - Git at Google

 /*
  * (C) Copyright 2000-2002
  * 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 <mpc8260.h>
 #include <asm/cpm_8260.h>
 #include <ioports.h>

 static void config_8260_ioports (volatile immap_t * immr)
 {
 	int portnum;

 	for (portnum = 0; portnum < 4; portnum++) {
 		uint pmsk = 0,
 		     ppar = 0,
 		     psor = 0,
 		     pdir = 0,
 		     podr = 0,
 		     pdat = 0;
 		iop_conf_t *iopc = (iop_conf_t *) & iop_conf_tab[portnum][0];
 		iop_conf_t *eiopc = iopc + 32;
 		uint msk = 1;

 		/*
 		 * NOTE:
 		 * index 0 refers to pin 31,
 		 * index 31 refers to pin 0
 		 */
 		while (iopc < eiopc) {
 			if (iopc->conf) {
 				pmsk |= msk;
 				if (iopc->ppar)
 					ppar |= msk;
 				if (iopc->psor)
 					psor |= msk;
 				if (iopc->pdir)
 					pdir |= msk;
 				if (iopc->podr)
 					podr |= msk;
 				if (iopc->pdat)
 					pdat |= msk;
 			}

 			msk <<= 1;
 			iopc++;
 		}

 		if (pmsk != 0) {
 			volatile ioport_t *iop = ioport_addr (immr, portnum);
 			uint tpmsk = ~pmsk;

 			/*
 			 * the (somewhat confused) paragraph at the
 			 * bottom of page 35-5 warns that there might
 			 * be "unknown behaviour" when programming
 			 * PSORx and PDIRx, if PPARx = 1, so I
 			 * decided this meant I had to disable the
 			 * dedicated function first, and enable it
 			 * last.
 			 */
 			iop->ppar &= tpmsk;
 			iop->psor = (iop->psor & tpmsk) | psor;
 			iop->podr = (iop->podr & tpmsk) | podr;
 			iop->pdat = (iop->pdat & tpmsk) | pdat;
 			iop->pdir = (iop->pdir & tpmsk) | pdir;
 			iop->ppar |= ppar;
 		}
 	}
 }

 /*
  * Breath some life into the CPU...
  *
  * Set up the memory map,
  * initialize a bunch of registers,
  * initialize the UPM's
  */
 void cpu_init_f (volatile immap_t * immr)
 {
 	DECLARE_GLOBAL_DATA_PTR;
 #if !defined(CONFIG_COGENT)		/* done in start.S for the cogent */
 	uint sccr;
 #endif
 	volatile memctl8260_t *memctl = &immr->im_memctl;
 	extern void m8260_cpm_reset (void);

 	/* Pointer is writable since we allocated a register for it */
 	gd = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET);

 	/* Clear initial global data */
 	memset ((void *) gd, 0, sizeof (gd_t));

 	/* RSR - Reset Status Register - clear all status (5-4) */
 	gd->reset_status = immr->im_clkrst.car_rsr;
 	immr->im_clkrst.car_rsr = RSR_ALLBITS;

 	/* RMR - Reset Mode Register - contains checkstop reset enable (5-5) */
 	immr->im_clkrst.car_rmr = CFG_RMR;

 	/* BCR - Bus Configuration Register (4-25) */
 	immr->im_siu_conf.sc_bcr = CFG_BCR;

 	/* SIUMCR - contains debug pin configuration (4-31) */
 	immr->im_siu_conf.sc_siumcr = CFG_SIUMCR;

 	config_8260_ioports (immr);

 	/* initialize time counter status and control register (4-40) */
 	immr->im_sit.sit_tmcntsc = CFG_TMCNTSC;

 	/* initialize the PIT (4-42) */
 	immr->im_sit.sit_piscr = CFG_PISCR;

 #if !defined(CONFIG_COGENT)		/* done in start.S for the cogent */
 	/* System clock control register (9-8) */
 	sccr = immr->im_clkrst.car_sccr &
 		(SCCR_PCI_MODE | SCCR_PCI_MODCK | SCCR_PCIDF_MSK);
 	immr->im_clkrst.car_sccr = sccr |
 		(CFG_SCCR & ~(SCCR_PCI_MODE | SCCR_PCI_MODCK | SCCR_PCIDF_MSK) );
 #endif /* !CONFIG_COGENT */

 	/*
 	 * Memory Controller:
 	 */

 	/* Map banks 0 and 1 to the FLASH banks 0 and 1 at preliminary
 	 * addresses - these have to be modified later when FLASH size
 	 * has been determined
 	 */

 #if defined(CFG_OR0_REMAP)
 	memctl->memc_or0 = CFG_OR0_REMAP;
 #endif
 #if defined(CFG_OR1_REMAP)
 	memctl->memc_or1 = CFG_OR1_REMAP;
 #endif

 	/* now restrict to preliminary range */
 	memctl->memc_br0 = CFG_BR0_PRELIM;
 	memctl->memc_or0 = CFG_OR0_PRELIM;

 #if defined(CFG_BR1_PRELIM) && defined(CFG_OR1_PRELIM)
 	memctl->memc_or1 = CFG_OR1_PRELIM;
 	memctl->memc_br1 = CFG_BR1_PRELIM;
 #endif

 #if defined(CFG_BR2_PRELIM) && defined(CFG_OR2_PRELIM)
 	memctl->memc_or2 = CFG_OR2_PRELIM;
 	memctl->memc_br2 = CFG_BR2_PRELIM;
 #endif

 #if defined(CFG_BR3_PRELIM) && defined(CFG_OR3_PRELIM)
 	memctl->memc_or3 = CFG_OR3_PRELIM;
 	memctl->memc_br3 = CFG_BR3_PRELIM;
 #endif

 #if defined(CFG_BR4_PRELIM) && defined(CFG_OR4_PRELIM)
 	memctl->memc_or4 = CFG_OR4_PRELIM;
 	memctl->memc_br4 = CFG_BR4_PRELIM;
 #endif

 #if defined(CFG_BR5_PRELIM) && defined(CFG_OR5_PRELIM)
 	memctl->memc_or5 = CFG_OR5_PRELIM;
 	memctl->memc_br5 = CFG_BR5_PRELIM;
 #endif

 #if defined(CFG_BR6_PRELIM) && defined(CFG_OR6_PRELIM)
 	memctl->memc_or6 = CFG_OR6_PRELIM;
 	memctl->memc_br6 = CFG_BR6_PRELIM;
 #endif

 #if defined(CFG_BR7_PRELIM) && defined(CFG_OR7_PRELIM)
 	memctl->memc_or7 = CFG_OR7_PRELIM;
 	memctl->memc_br7 = CFG_BR7_PRELIM;
 #endif

 #if defined(CFG_BR8_PRELIM) && defined(CFG_OR8_PRELIM)
 	memctl->memc_or8 = CFG_OR8_PRELIM;
 	memctl->memc_br8 = CFG_BR8_PRELIM;
 #endif

 #if defined(CFG_BR9_PRELIM) && defined(CFG_OR9_PRELIM)
 	memctl->memc_or9 = CFG_OR9_PRELIM;
 	memctl->memc_br9 = CFG_BR9_PRELIM;
 #endif

 #if defined(CFG_BR10_PRELIM) && defined(CFG_OR10_PRELIM)
 	memctl->memc_or10 = CFG_OR10_PRELIM;
 	memctl->memc_br10 = CFG_BR10_PRELIM;
 #endif

 #if defined(CFG_BR11_PRELIM) && defined(CFG_OR11_PRELIM)
 	memctl->memc_or11 = CFG_OR11_PRELIM;
 	memctl->memc_br11 = CFG_BR11_PRELIM;
 #endif

 	m8260_cpm_reset ();
 }

 /*
  * initialize higher level parts of CPU like time base and timers
  */
 int cpu_init_r (void)
 {
 	DECLARE_GLOBAL_DATA_PTR;

 	volatile immap_t *immr = (immap_t *) gd->bd->bi_immr_base;

 	immr->im_cpm.cp_rccr = CFG_RCCR;

 	return (0);
 }

 /*
  * print out the reason for the reset
  */
 int prt_8260_rsr (void)
 {
 	DECLARE_GLOBAL_DATA_PTR;

 	static struct {
 		ulong mask;
 		char *desc;
 	} bits[] = {
 		{
 		RSR_JTRS, "JTAG"}, {
 		RSR_CSRS, "Check Stop"}, {
 		RSR_SWRS, "Software Watchdog"}, {
 		RSR_BMRS, "Bus Monitor"}, {
 		RSR_ESRS, "External Soft"}, {
 		RSR_EHRS, "External Hard"}
 	};
 	static int n = sizeof bits / sizeof bits[0];
 	ulong rsr = gd->reset_status;
 	int i;
 	char *sep;

 	puts (CPU_ID_STR " Reset Status:");

 	sep = " ";
 	for (i = 0; i < n; i++)
 		if (rsr & bits[i].mask) {
 			printf ("%s%s", sep, bits[i].desc);
 			sep = ", ";
 		}

 	puts ("\n\n");
 	return (0);
 }
	/*
	* (C) Copyright 2000-2002
	* 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 <mpc8260.h>
	#include <asm/cpm_8260.h>
	#include <ioports.h>

	static void config_8260_ioports (volatile immap_t * immr)
	{
	int portnum;

	for (portnum = 0; portnum < 4; portnum++) {
	uint pmsk = 0,
	ppar = 0,
	psor = 0,
	pdir = 0,
	podr = 0,
	pdat = 0;
	iop_conf_t iopc = (iop_conf_t ) & iop_conf_tab[portnum][0];
	iop_conf_t *eiopc = iopc + 32;
	uint msk = 1;

	/*
	* NOTE:
	* index 0 refers to pin 31,
	* index 31 refers to pin 0
	*/
	while (iopc < eiopc) {
	if (iopc->conf) {
	pmsk \|= msk;
	if (iopc->ppar)
	ppar \|= msk;
	if (iopc->psor)
	psor \|= msk;
	if (iopc->pdir)
	pdir \|= msk;
	if (iopc->podr)
	podr \|= msk;
	if (iopc->pdat)
	pdat \|= msk;
	}

	msk <<= 1;
	iopc++;
	}

	if (pmsk != 0) {
	volatile ioport_t *iop = ioport_addr (immr, portnum);
	uint tpmsk = ~pmsk;

	/*
	* the (somewhat confused) paragraph at the
	* bottom of page 35-5 warns that there might
	* be "unknown behaviour" when programming
	* PSORx and PDIRx, if PPARx = 1, so I
	* decided this meant I had to disable the
	* dedicated function first, and enable it
	* last.
	*/
	iop->ppar &= tpmsk;
	iop->psor = (iop->psor & tpmsk) \| psor;
	iop->podr = (iop->podr & tpmsk) \| podr;
	iop->pdat = (iop->pdat & tpmsk) \| pdat;
	iop->pdir = (iop->pdir & tpmsk) \| pdir;
	iop->ppar \|= ppar;
	}
	}
	}

	/*
	* Breath some life into the CPU...
	*
	* Set up the memory map,
	* initialize a bunch of registers,
	* initialize the UPM's
	*/
	void cpu_init_f (volatile immap_t * immr)
	{
	DECLARE_GLOBAL_DATA_PTR;
	#if !defined(CONFIG_COGENT) /* done in start.S for the cogent */
	uint sccr;
	#endif
	volatile memctl8260_t *memctl = &immr->im_memctl;
	extern void m8260_cpm_reset (void);

	/* Pointer is writable since we allocated a register for it */
	gd = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET);

	/* Clear initial global data */
	memset ((void *) gd, 0, sizeof (gd_t));

	/* RSR - Reset Status Register - clear all status (5-4) */
	gd->reset_status = immr->im_clkrst.car_rsr;
	immr->im_clkrst.car_rsr = RSR_ALLBITS;

	/* RMR - Reset Mode Register - contains checkstop reset enable (5-5) */
	immr->im_clkrst.car_rmr = CFG_RMR;

	/* BCR - Bus Configuration Register (4-25) */
	immr->im_siu_conf.sc_bcr = CFG_BCR;

	/* SIUMCR - contains debug pin configuration (4-31) */
	immr->im_siu_conf.sc_siumcr = CFG_SIUMCR;

	config_8260_ioports (immr);

	/* initialize time counter status and control register (4-40) */
	immr->im_sit.sit_tmcntsc = CFG_TMCNTSC;

	/* initialize the PIT (4-42) */
	immr->im_sit.sit_piscr = CFG_PISCR;

	#if !defined(CONFIG_COGENT) /* done in start.S for the cogent */
	/* System clock control register (9-8) */
	sccr = immr->im_clkrst.car_sccr &
	(SCCR_PCI_MODE \| SCCR_PCI_MODCK \| SCCR_PCIDF_MSK);
	immr->im_clkrst.car_sccr = sccr \|
	(CFG_SCCR & ~(SCCR_PCI_MODE \| SCCR_PCI_MODCK \| SCCR_PCIDF_MSK) );
	#endif /* !CONFIG_COGENT */

	/*
	* Memory Controller:
	*/

	/* Map banks 0 and 1 to the FLASH banks 0 and 1 at preliminary
	* addresses - these have to be modified later when FLASH size
	* has been determined
	*/

	#if defined(CFG_OR0_REMAP)
	memctl->memc_or0 = CFG_OR0_REMAP;
	#endif
	#if defined(CFG_OR1_REMAP)
	memctl->memc_or1 = CFG_OR1_REMAP;
	#endif

	/* now restrict to preliminary range */
	memctl->memc_br0 = CFG_BR0_PRELIM;
	memctl->memc_or0 = CFG_OR0_PRELIM;

	#if defined(CFG_BR1_PRELIM) && defined(CFG_OR1_PRELIM)
	memctl->memc_or1 = CFG_OR1_PRELIM;
	memctl->memc_br1 = CFG_BR1_PRELIM;
	#endif

	#if defined(CFG_BR2_PRELIM) && defined(CFG_OR2_PRELIM)
	memctl->memc_or2 = CFG_OR2_PRELIM;
	memctl->memc_br2 = CFG_BR2_PRELIM;
	#endif

	#if defined(CFG_BR3_PRELIM) && defined(CFG_OR3_PRELIM)
	memctl->memc_or3 = CFG_OR3_PRELIM;
	memctl->memc_br3 = CFG_BR3_PRELIM;
	#endif

	#if defined(CFG_BR4_PRELIM) && defined(CFG_OR4_PRELIM)
	memctl->memc_or4 = CFG_OR4_PRELIM;
	memctl->memc_br4 = CFG_BR4_PRELIM;
	#endif

	#if defined(CFG_BR5_PRELIM) && defined(CFG_OR5_PRELIM)
	memctl->memc_or5 = CFG_OR5_PRELIM;
	memctl->memc_br5 = CFG_BR5_PRELIM;
	#endif

	#if defined(CFG_BR6_PRELIM) && defined(CFG_OR6_PRELIM)
	memctl->memc_or6 = CFG_OR6_PRELIM;
	memctl->memc_br6 = CFG_BR6_PRELIM;
	#endif

	#if defined(CFG_BR7_PRELIM) && defined(CFG_OR7_PRELIM)
	memctl->memc_or7 = CFG_OR7_PRELIM;
	memctl->memc_br7 = CFG_BR7_PRELIM;
	#endif

	#if defined(CFG_BR8_PRELIM) && defined(CFG_OR8_PRELIM)
	memctl->memc_or8 = CFG_OR8_PRELIM;
	memctl->memc_br8 = CFG_BR8_PRELIM;
	#endif

	#if defined(CFG_BR9_PRELIM) && defined(CFG_OR9_PRELIM)
	memctl->memc_or9 = CFG_OR9_PRELIM;
	memctl->memc_br9 = CFG_BR9_PRELIM;
	#endif

	#if defined(CFG_BR10_PRELIM) && defined(CFG_OR10_PRELIM)
	memctl->memc_or10 = CFG_OR10_PRELIM;
	memctl->memc_br10 = CFG_BR10_PRELIM;
	#endif

	#if defined(CFG_BR11_PRELIM) && defined(CFG_OR11_PRELIM)
	memctl->memc_or11 = CFG_OR11_PRELIM;
	memctl->memc_br11 = CFG_BR11_PRELIM;
	#endif

	m8260_cpm_reset ();
	}

	/*
	* initialize higher level parts of CPU like time base and timers
	*/
	int cpu_init_r (void)
	{
	DECLARE_GLOBAL_DATA_PTR;

	volatile immap_t immr = (immap_t ) gd->bd->bi_immr_base;

	immr->im_cpm.cp_rccr = CFG_RCCR;

	return (0);
	}

	/*
	* print out the reason for the reset
	*/
	int prt_8260_rsr (void)
	{
	DECLARE_GLOBAL_DATA_PTR;

	static struct {
	ulong mask;
	char *desc;
	} bits[] = {
	{
	RSR_JTRS, "JTAG"}, {
	RSR_CSRS, "Check Stop"}, {
	RSR_SWRS, "Software Watchdog"}, {
	RSR_BMRS, "Bus Monitor"}, {
	RSR_ESRS, "External Soft"}, {
	RSR_EHRS, "External Hard"}
	};
	static int n = sizeof bits / sizeof bits[0];
	ulong rsr = gd->reset_status;
	int i;
	char *sep;

	puts (CPU_ID_STR " Reset Status:");

	sep = " ";
	for (i = 0; i < n; i++)
	if (rsr & bits[i].mask) {
	printf ("%s%s", sep, bits[i].desc);
	sep = ", ";
	}

	puts ("\n\n");
	return (0);
	}