arch/powerpc/cpu/mpc8xx/cpu_init.c - github/trini/u-boot - Gitiles

 /*
  * (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 <watchdog.h>

 #include <mpc8xx.h>
 #include <commproc.h>

 #if defined(CONFIG_SYS_RTCSC) || defined(CONFIG_SYS_RMDS)
 DECLARE_GLOBAL_DATA_PTR;
 #endif

 #if defined(CONFIG_SYS_I2C_UCODE_PATCH) || defined(CONFIG_SYS_SPI_UCODE_PATCH) || \
     defined(CONFIG_SYS_SMC_UCODE_PATCH)
 void cpm_load_patch (volatile immap_t * immr);
 #endif

 /*
  * 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)
 {
 #ifndef CONFIG_MBX
 	volatile memctl8xx_t *memctl = &immr->im_memctl;
 # ifdef CONFIG_SYS_PLPRCR
 	ulong mfmask;
 # endif
 #endif
 	ulong reg;

 	/* SYPCR - contains watchdog control (11-9) */

 	immr->im_siu_conf.sc_sypcr = CONFIG_SYS_SYPCR;

 #if defined(CONFIG_WATCHDOG)
 	reset_8xx_watchdog (immr);
 #endif /* CONFIG_WATCHDOG */

 	/* SIUMCR - contains debug pin configuration (11-6) */
 #ifndef CONFIG_SVM_SC8xx
 	immr->im_siu_conf.sc_siumcr |= CONFIG_SYS_SIUMCR;
 #else
 	immr->im_siu_conf.sc_siumcr = CONFIG_SYS_SIUMCR;
 #endif
 	/* initialize timebase status and control register (11-26) */
 	/* unlock TBSCRK */

 	immr->im_sitk.sitk_tbscrk = KAPWR_KEY;
 	immr->im_sit.sit_tbscr = CONFIG_SYS_TBSCR;

 	/* initialize the PIT (11-31) */

 	immr->im_sitk.sitk_piscrk = KAPWR_KEY;
 	immr->im_sit.sit_piscr = CONFIG_SYS_PISCR;

 	/* System integration timers. Don't change EBDF! (15-27) */

 	immr->im_clkrstk.cark_sccrk = KAPWR_KEY;
 	reg = immr->im_clkrst.car_sccr;
 	reg &= SCCR_MASK;
 	reg |= CONFIG_SYS_SCCR;
 	immr->im_clkrst.car_sccr = reg;

 	/* PLL (CPU clock) settings (15-30) */

 	immr->im_clkrstk.cark_plprcrk = KAPWR_KEY;

 #ifndef CONFIG_MBX		/* MBX board does things different */

 	/* If CONFIG_SYS_PLPRCR (set in the various *_config.h files) tries to
 	 * set the MF field, then just copy CONFIG_SYS_PLPRCR over car_plprcr,
 	 * otherwise OR in CONFIG_SYS_PLPRCR so we do not change the current MF
 	 * field value.
 	 *
 	 * For newer (starting MPC866) chips PLPRCR layout is different.
 	 */
 #ifdef CONFIG_SYS_PLPRCR
 	if (get_immr(0xFFFF) >= MPC8xx_NEW_CLK)
 	   mfmask = PLPRCR_MFACT_MSK;
 	else
 	   mfmask = PLPRCR_MF_MSK;

 	if ((CONFIG_SYS_PLPRCR & mfmask) != 0)
 	   reg = CONFIG_SYS_PLPRCR;			/* reset control bits   */
 	else {
 	   reg = immr->im_clkrst.car_plprcr;
 	   reg &= mfmask;			/* isolate MF-related fields */
 	   reg |= CONFIG_SYS_PLPRCR;			/* reset control bits   */
 	}
 	immr->im_clkrst.car_plprcr = reg;
 #endif

 	/*
 	 * Memory Controller:
 	 */

 	/* perform BR0 reset that MPC850 Rev. A can't guarantee */
 	reg = memctl->memc_br0;
 	reg &= BR_PS_MSK;	/* Clear everything except Port Size bits */
 	reg |= BR_V;		/* then add just the "Bank Valid" bit     */
 	memctl->memc_br0 = reg;

 	/* Map banks 0 (and maybe 1) to the FLASH banks 0 (and 1) at
 	 * preliminary addresses - these have to be modified later
 	 * when FLASH size has been determined
 	 *
 	 * Depending on the size of the memory region defined by
 	 * CONFIG_SYS_OR0_REMAP some boards (wide address mask) allow to map the
 	 * CONFIG_SYS_MONITOR_BASE, while others (narrower address mask) can't
 	 * map CONFIG_SYS_MONITOR_BASE.
 	 *
 	 * For example, for CONFIG_IVMS8, the CONFIG_SYS_MONITOR_BASE is
 	 * 0xff000000, but CONFIG_SYS_OR0_REMAP's address mask is 0xfff80000.
 	 *
 	 * If BR0 wasn't loaded with address base 0xff000000, then BR0's
 	 * base address remains as 0x00000000. However, the address mask
 	 * have been narrowed to 512Kb, so CONFIG_SYS_MONITOR_BASE wasn't mapped
 	 * into the Bank0.
 	 *
 	 * This is why CONFIG_IVMS8 and similar boards must load BR0 with
 	 * CONFIG_SYS_BR0_PRELIM in advance.
 	 *
 	 * [Thanks to Michael Liao for this explanation.
 	 *  I owe him a free beer. - wd]
 	 */

 #if defined(CONFIG_HERMES)	|| \
     defined(CONFIG_ICU862)	|| \
     defined(CONFIG_IP860)	|| \
     defined(CONFIG_IVML24)	|| \
     defined(CONFIG_IVMS8)	|| \
     defined(CONFIG_LWMON)	|| \
     defined(CONFIG_MHPC)	|| \
     defined(CONFIG_R360MPI)	|| \
     defined(CONFIG_RMU)		|| \
     defined(CONFIG_RPXCLASSIC)	|| \
     defined(CONFIG_RPXLITE)	|| \
     defined(CONFIG_SPC1920)	|| \
     defined(CONFIG_SPD823TS)

 	memctl->memc_br0 = CONFIG_SYS_BR0_PRELIM;
 #endif

 #if defined(CONFIG_SYS_OR0_REMAP)
 	memctl->memc_or0 = CONFIG_SYS_OR0_REMAP;
 #endif
 #if defined(CONFIG_SYS_OR1_REMAP)
 	memctl->memc_or1 = CONFIG_SYS_OR1_REMAP;
 #endif
 #if defined(CONFIG_SYS_OR5_REMAP)
 	memctl->memc_or5 = CONFIG_SYS_OR5_REMAP;
 #endif

 	/* now restrict to preliminary range */
 	memctl->memc_br0 = CONFIG_SYS_BR0_PRELIM;
 	memctl->memc_or0 = CONFIG_SYS_OR0_PRELIM;

 #if (defined(CONFIG_SYS_OR1_PRELIM) && defined(CONFIG_SYS_BR1_PRELIM))
 	memctl->memc_or1 = CONFIG_SYS_OR1_PRELIM;
 	memctl->memc_br1 = CONFIG_SYS_BR1_PRELIM;
 #endif

 #if defined(CONFIG_IP860) /* disable CS0 now that Flash is mapped on CS1 */
 	memctl->memc_br0 = 0;
 #endif

 #if defined(CONFIG_SYS_OR2_PRELIM) && defined(CONFIG_SYS_BR2_PRELIM)
 	memctl->memc_or2 = CONFIG_SYS_OR2_PRELIM;
 	memctl->memc_br2 = CONFIG_SYS_BR2_PRELIM;
 #endif

 #if defined(CONFIG_SYS_OR3_PRELIM) && defined(CONFIG_SYS_BR3_PRELIM)
 	memctl->memc_or3 = CONFIG_SYS_OR3_PRELIM;
 	memctl->memc_br3 = CONFIG_SYS_BR3_PRELIM;
 #endif

 #if defined(CONFIG_SYS_OR4_PRELIM) && defined(CONFIG_SYS_BR4_PRELIM)
 	memctl->memc_or4 = CONFIG_SYS_OR4_PRELIM;
 	memctl->memc_br4 = CONFIG_SYS_BR4_PRELIM;
 #endif

 #if defined(CONFIG_SYS_OR5_PRELIM) && defined(CONFIG_SYS_BR5_PRELIM)
 	memctl->memc_or5 = CONFIG_SYS_OR5_PRELIM;
 	memctl->memc_br5 = CONFIG_SYS_BR5_PRELIM;
 #endif

 #if defined(CONFIG_SYS_OR6_PRELIM) && defined(CONFIG_SYS_BR6_PRELIM)
 	memctl->memc_or6 = CONFIG_SYS_OR6_PRELIM;
 	memctl->memc_br6 = CONFIG_SYS_BR6_PRELIM;
 #endif

 #if defined(CONFIG_SYS_OR7_PRELIM) && defined(CONFIG_SYS_BR7_PRELIM)
 	memctl->memc_or7 = CONFIG_SYS_OR7_PRELIM;
 	memctl->memc_br7 = CONFIG_SYS_BR7_PRELIM;
 #endif

 #endif /* ! CONFIG_MBX */

 	/*
 	 * Reset CPM
 	 */
 	immr->im_cpm.cp_cpcr = CPM_CR_RST | CPM_CR_FLG;
 	do {			/* Spin until command processed     */
 		__asm__ ("eieio");
 	} while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);

 #ifdef CONFIG_MBX
 	/*
 	 * on the MBX, things are a little bit different:
 	 * - we need to read the VPD to get board information
 	 * - the plprcr is set up dynamically
 	 * - the memory controller is set up dynamically
 	 */
 	mbx_init ();
 #endif /* CONFIG_MBX */

 #ifdef CONFIG_RPXCLASSIC
 	rpxclassic_init ();
 #endif

 #if defined(CONFIG_RPXLITE) && defined(CONFIG_ENV_IS_IN_NVRAM)
 	rpxlite_init ();
 #endif

 #ifdef CONFIG_SYS_RCCR			/* must be done before cpm_load_patch() */
 	/* write config value */
 	immr->im_cpm.cp_rccr = CONFIG_SYS_RCCR;
 #endif

 #if defined(CONFIG_SYS_I2C_UCODE_PATCH) || defined(CONFIG_SYS_SPI_UCODE_PATCH) || \
     defined(CONFIG_SYS_SMC_UCODE_PATCH)
 	cpm_load_patch (immr);	/* load mpc8xx  microcode patch */
 #endif
 }

 /*
  * initialize higher level parts of CPU like timers
  */
 int cpu_init_r (void)
 {
 #if defined(CONFIG_SYS_RTCSC) || defined(CONFIG_SYS_RMDS)
 	bd_t *bd = gd->bd;
 	volatile immap_t *immr = (volatile immap_t *) (bd->bi_immr_base);
 #endif

 #ifdef CONFIG_SYS_RTCSC
 	/* Unlock RTSC register */
 	immr->im_sitk.sitk_rtcsck = KAPWR_KEY;
 	/* write config value */
 	immr->im_sit.sit_rtcsc = CONFIG_SYS_RTCSC;
 #endif

 #ifdef CONFIG_SYS_RMDS
 	/* write config value */
 	immr->im_cpm.cp_rmds = CONFIG_SYS_RMDS;
 #endif
 	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 <watchdog.h>

	#include <mpc8xx.h>
	#include <commproc.h>

	#if defined(CONFIG_SYS_RTCSC) \|\| defined(CONFIG_SYS_RMDS)
	DECLARE_GLOBAL_DATA_PTR;
	#endif

	#if defined(CONFIG_SYS_I2C_UCODE_PATCH) \|\| defined(CONFIG_SYS_SPI_UCODE_PATCH) \|\| \
	defined(CONFIG_SYS_SMC_UCODE_PATCH)
	void cpm_load_patch (volatile immap_t * immr);
	#endif

	/*
	* 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)
	{
	#ifndef CONFIG_MBX
	volatile memctl8xx_t *memctl = &immr->im_memctl;
	# ifdef CONFIG_SYS_PLPRCR
	ulong mfmask;
	# endif
	#endif
	ulong reg;

	/* SYPCR - contains watchdog control (11-9) */

	immr->im_siu_conf.sc_sypcr = CONFIG_SYS_SYPCR;

	#if defined(CONFIG_WATCHDOG)
	reset_8xx_watchdog (immr);
	#endif /* CONFIG_WATCHDOG */

	/* SIUMCR - contains debug pin configuration (11-6) */
	#ifndef CONFIG_SVM_SC8xx
	immr->im_siu_conf.sc_siumcr \|= CONFIG_SYS_SIUMCR;
	#else
	immr->im_siu_conf.sc_siumcr = CONFIG_SYS_SIUMCR;
	#endif
	/* initialize timebase status and control register (11-26) */
	/* unlock TBSCRK */

	immr->im_sitk.sitk_tbscrk = KAPWR_KEY;
	immr->im_sit.sit_tbscr = CONFIG_SYS_TBSCR;

	/* initialize the PIT (11-31) */

	immr->im_sitk.sitk_piscrk = KAPWR_KEY;
	immr->im_sit.sit_piscr = CONFIG_SYS_PISCR;

	/* System integration timers. Don't change EBDF! (15-27) */

	immr->im_clkrstk.cark_sccrk = KAPWR_KEY;
	reg = immr->im_clkrst.car_sccr;
	reg &= SCCR_MASK;
	reg \|= CONFIG_SYS_SCCR;
	immr->im_clkrst.car_sccr = reg;

	/* PLL (CPU clock) settings (15-30) */

	immr->im_clkrstk.cark_plprcrk = KAPWR_KEY;

	#ifndef CONFIG_MBX /* MBX board does things different */

	/* If CONFIG_SYS_PLPRCR (set in the various *_config.h files) tries to
	* set the MF field, then just copy CONFIG_SYS_PLPRCR over car_plprcr,
	* otherwise OR in CONFIG_SYS_PLPRCR so we do not change the current MF
	* field value.
	*
	* For newer (starting MPC866) chips PLPRCR layout is different.
	*/
	#ifdef CONFIG_SYS_PLPRCR
	if (get_immr(0xFFFF) >= MPC8xx_NEW_CLK)
	mfmask = PLPRCR_MFACT_MSK;
	else
	mfmask = PLPRCR_MF_MSK;

	if ((CONFIG_SYS_PLPRCR & mfmask) != 0)
	reg = CONFIG_SYS_PLPRCR; /* reset control bits */
	else {
	reg = immr->im_clkrst.car_plprcr;
	reg &= mfmask; /* isolate MF-related fields */
	reg \|= CONFIG_SYS_PLPRCR; /* reset control bits */
	}
	immr->im_clkrst.car_plprcr = reg;
	#endif

	/*
	* Memory Controller:
	*/

	/* perform BR0 reset that MPC850 Rev. A can't guarantee */
	reg = memctl->memc_br0;
	reg &= BR_PS_MSK; /* Clear everything except Port Size bits */
	reg \|= BR_V; /* then add just the "Bank Valid" bit */
	memctl->memc_br0 = reg;

	/* Map banks 0 (and maybe 1) to the FLASH banks 0 (and 1) at
	* preliminary addresses - these have to be modified later
	* when FLASH size has been determined
	*
	* Depending on the size of the memory region defined by
	* CONFIG_SYS_OR0_REMAP some boards (wide address mask) allow to map the
	* CONFIG_SYS_MONITOR_BASE, while others (narrower address mask) can't
	* map CONFIG_SYS_MONITOR_BASE.
	*
	* For example, for CONFIG_IVMS8, the CONFIG_SYS_MONITOR_BASE is
	* 0xff000000, but CONFIG_SYS_OR0_REMAP's address mask is 0xfff80000.
	*
	* If BR0 wasn't loaded with address base 0xff000000, then BR0's
	* base address remains as 0x00000000. However, the address mask
	* have been narrowed to 512Kb, so CONFIG_SYS_MONITOR_BASE wasn't mapped
	* into the Bank0.
	*
	* This is why CONFIG_IVMS8 and similar boards must load BR0 with
	* CONFIG_SYS_BR0_PRELIM in advance.
	*
	* [Thanks to Michael Liao for this explanation.
	* I owe him a free beer. - wd]
	*/

	#if defined(CONFIG_HERMES) \|\| \
	defined(CONFIG_ICU862) \|\| \
	defined(CONFIG_IP860) \|\| \
	defined(CONFIG_IVML24) \|\| \
	defined(CONFIG_IVMS8) \|\| \
	defined(CONFIG_LWMON) \|\| \
	defined(CONFIG_MHPC) \|\| \
	defined(CONFIG_R360MPI) \|\| \
	defined(CONFIG_RMU) \|\| \
	defined(CONFIG_RPXCLASSIC) \|\| \
	defined(CONFIG_RPXLITE) \|\| \
	defined(CONFIG_SPC1920) \|\| \
	defined(CONFIG_SPD823TS)

	memctl->memc_br0 = CONFIG_SYS_BR0_PRELIM;
	#endif

	#if defined(CONFIG_SYS_OR0_REMAP)
	memctl->memc_or0 = CONFIG_SYS_OR0_REMAP;
	#endif
	#if defined(CONFIG_SYS_OR1_REMAP)
	memctl->memc_or1 = CONFIG_SYS_OR1_REMAP;
	#endif
	#if defined(CONFIG_SYS_OR5_REMAP)
	memctl->memc_or5 = CONFIG_SYS_OR5_REMAP;
	#endif

	/* now restrict to preliminary range */
	memctl->memc_br0 = CONFIG_SYS_BR0_PRELIM;
	memctl->memc_or0 = CONFIG_SYS_OR0_PRELIM;

	#if (defined(CONFIG_SYS_OR1_PRELIM) && defined(CONFIG_SYS_BR1_PRELIM))
	memctl->memc_or1 = CONFIG_SYS_OR1_PRELIM;
	memctl->memc_br1 = CONFIG_SYS_BR1_PRELIM;
	#endif

	#if defined(CONFIG_IP860) /* disable CS0 now that Flash is mapped on CS1 */
	memctl->memc_br0 = 0;
	#endif

	#if defined(CONFIG_SYS_OR2_PRELIM) && defined(CONFIG_SYS_BR2_PRELIM)
	memctl->memc_or2 = CONFIG_SYS_OR2_PRELIM;
	memctl->memc_br2 = CONFIG_SYS_BR2_PRELIM;
	#endif

	#if defined(CONFIG_SYS_OR3_PRELIM) && defined(CONFIG_SYS_BR3_PRELIM)
	memctl->memc_or3 = CONFIG_SYS_OR3_PRELIM;
	memctl->memc_br3 = CONFIG_SYS_BR3_PRELIM;
	#endif

	#if defined(CONFIG_SYS_OR4_PRELIM) && defined(CONFIG_SYS_BR4_PRELIM)
	memctl->memc_or4 = CONFIG_SYS_OR4_PRELIM;
	memctl->memc_br4 = CONFIG_SYS_BR4_PRELIM;
	#endif

	#if defined(CONFIG_SYS_OR5_PRELIM) && defined(CONFIG_SYS_BR5_PRELIM)
	memctl->memc_or5 = CONFIG_SYS_OR5_PRELIM;
	memctl->memc_br5 = CONFIG_SYS_BR5_PRELIM;
	#endif

	#if defined(CONFIG_SYS_OR6_PRELIM) && defined(CONFIG_SYS_BR6_PRELIM)
	memctl->memc_or6 = CONFIG_SYS_OR6_PRELIM;
	memctl->memc_br6 = CONFIG_SYS_BR6_PRELIM;
	#endif

	#if defined(CONFIG_SYS_OR7_PRELIM) && defined(CONFIG_SYS_BR7_PRELIM)
	memctl->memc_or7 = CONFIG_SYS_OR7_PRELIM;
	memctl->memc_br7 = CONFIG_SYS_BR7_PRELIM;
	#endif

	#endif /* ! CONFIG_MBX */

	/*
	* Reset CPM
	*/
	immr->im_cpm.cp_cpcr = CPM_CR_RST \| CPM_CR_FLG;
	do { /* Spin until command processed */
	__asm__ ("eieio");
	} while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);

	#ifdef CONFIG_MBX
	/*
	* on the MBX, things are a little bit different:
	* - we need to read the VPD to get board information
	* - the plprcr is set up dynamically
	* - the memory controller is set up dynamically
	*/
	mbx_init ();
	#endif /* CONFIG_MBX */

	#ifdef CONFIG_RPXCLASSIC
	rpxclassic_init ();
	#endif

	#if defined(CONFIG_RPXLITE) && defined(CONFIG_ENV_IS_IN_NVRAM)
	rpxlite_init ();
	#endif

	#ifdef CONFIG_SYS_RCCR /* must be done before cpm_load_patch() */
	/* write config value */
	immr->im_cpm.cp_rccr = CONFIG_SYS_RCCR;
	#endif

	#if defined(CONFIG_SYS_I2C_UCODE_PATCH) \|\| defined(CONFIG_SYS_SPI_UCODE_PATCH) \|\| \
	defined(CONFIG_SYS_SMC_UCODE_PATCH)
	cpm_load_patch (immr); /* load mpc8xx microcode patch */
	#endif
	}

	/*
	* initialize higher level parts of CPU like timers
	*/
	int cpu_init_r (void)
	{
	#if defined(CONFIG_SYS_RTCSC) \|\| defined(CONFIG_SYS_RMDS)
	bd_t *bd = gd->bd;
	volatile immap_t immr = (volatile immap_t ) (bd->bi_immr_base);
	#endif

	#ifdef CONFIG_SYS_RTCSC
	/* Unlock RTSC register */
	immr->im_sitk.sitk_rtcsck = KAPWR_KEY;
	/* write config value */
	immr->im_sit.sit_rtcsc = CONFIG_SYS_RTCSC;
	#endif

	#ifdef CONFIG_SYS_RMDS
	/* write config value */
	immr->im_cpm.cp_rmds = CONFIG_SYS_RMDS;
	#endif
	return (0);
	}