cpu/mpc8260/cpu.c - filogic/uboot - Gitiles

 /*
  * (C) Copyright 2000-2003
  * 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
  */

 /*
  * CPU specific code for the MPC825x / MPC826x / MPC827x / MPC828x
  *
  * written or collected and sometimes rewritten by
  * Magnus Damm <damm@bitsmart.com>
  *
  * modified by
  * Wolfgang Denk <wd@denx.de>
  *
  * modified for 8260 by
  * Murray Jensen <Murray.Jensen@cmst.csiro.au>
  *
  * added 8260 masks by
  * Marius Groeger <mag@sysgo.de>
  *
  * added HiP7 (824x/827x/8280) processors support by
  * Yuli Barcohen <yuli@arabellasw.com>
  */

 #include <common.h>
 #include <watchdog.h>
 #include <command.h>
 #include <mpc8260.h>
 #include <asm/processor.h>
 #include <asm/cpm_8260.h>

 int checkcpu (void)
 {
 	DECLARE_GLOBAL_DATA_PTR;

 	volatile immap_t *immap = (immap_t *) CFG_IMMR;
 	ulong clock = gd->cpu_clk;
 	uint pvr = get_pvr ();
 	uint immr, rev, m, k;
 	char buf[32];

 	puts ("CPU:   ");

 	switch (pvr) {
 	case PVR_8260:
 	case PVR_8260_HIP3:
 		k = 3;
 		break;
 	case PVR_8260_HIP4:
 		k = 4;
 		break;
 	case PVR_8260_HIP7R1:
 	case PVR_8260_HIP7:
 		k = 7;
 		break;
 	default:
 		return -1;	/* whoops! not an MPC8260 */
 	}
 	rev = pvr & 0xff;

 	immr = immap->im_memctl.memc_immr;
 	if ((immr & IMMR_ISB_MSK) != CFG_IMMR)
 		return -1;	/* whoops! someone moved the IMMR */

 	printf (CPU_ID_STR " (HiP%d Rev %02x, Mask ", k, rev);

 	/*
 	 * the bottom 16 bits of the immr are the Part Number and Mask Number
 	 * (4-34); the 16 bits at PROFF_REVNUM (0x8af0) in dual port ram is the
 	 * RISC Microcode Revision Number (13-10).
 	 * For the 8260, Motorola doesn't include the Microcode Revision
 	 * in the mask.
 	 */
 	m = immr & (IMMR_PARTNUM_MSK | IMMR_MASKNUM_MSK);
 	k = *((ushort *) & immap->im_dprambase[PROFF_REVNUM]);

 	switch (m) {
 	case 0x0000:
 		puts ("0.2 2J24M");
 		break;
 	case 0x0010:
 		puts ("A.0 K22A");
 		break;
 	case 0x0011:
 		puts ("A.1 1K22A-XC");
 		break;
 	case 0x0001:
 		puts ("B.1 1K23A");
 		break;
 	case 0x0021:
 		puts ("B.2 2K23A-XC");
 		break;
 	case 0x0023:
 		puts ("B.3 3K23A");
 		break;
 	case 0x0024:
 		puts ("C.2 6K23A");
 		break;
 	case 0x0060:
 		puts ("A.0(A) 2K25A");
 		break;
 	case 0x0062:
 		puts ("B.1 4K25A");
 		break;
 	case 0x0064:
 		puts ("C.0 5K25A");
 		break;
 	case 0x0A00:
 		puts ("0.0 0K49M");
 		break;
 	case 0x0A01:
 		puts ("0.1 1K49M");
 		break;
 	case 0x0C00:
 	case 0x0D00:
 		printf ("0.0 0K50M");
 		break;
 	default:
 		printf ("unknown [immr=0x%04x,k=0x%04x]", m, k);
 		break;
 	}

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

 	return 0;
 }

 /* ------------------------------------------------------------------------- */
 /* configures a UPM by writing into the UPM RAM array			     */
 /* uses bank 11 and a dummy physical address (=BRx_BA_MSK)		     */
 /* NOTE: the physical address chosen must not overlap into any other area    */
 /* mapped by the memory controller because bank 11 has the lowest priority   */

 void upmconfig (uint upm, uint * table, uint size)
 {
 	volatile immap_t *immap = (immap_t *) CFG_IMMR;
 	volatile memctl8260_t *memctl = &immap->im_memctl;
 	volatile uchar *dummy = (uchar *) BRx_BA_MSK;	/* set all BA bits */
 	uint i;

 	/* first set up bank 11 to reference the correct UPM at a dummy address */

 	memctl->memc_or11 = ORxU_AM_MSK;	/* set all AM bits */

 	switch (upm) {

 	case UPMA:
 		memctl->memc_br11 =
 			((uint)dummy & BRx_BA_MSK) | BRx_PS_32 | BRx_MS_UPMA |
 			BRx_V;
 		memctl->memc_mamr = MxMR_OP_WARR;
 		break;

 	case UPMB:
 		memctl->memc_br11 =
 			((uint)dummy & BRx_BA_MSK) | BRx_PS_32 | BRx_MS_UPMB |
 			BRx_V;
 		memctl->memc_mbmr = MxMR_OP_WARR;
 		break;

 	case UPMC:
 		memctl->memc_br11 =
 			((uint)dummy & BRx_BA_MSK) | BRx_PS_32 | BRx_MS_UPMC |
 			BRx_V;
 		memctl->memc_mcmr = MxMR_OP_WARR;
 		break;

 	default:
 		panic ("upmconfig passed invalid UPM number (%u)\n", upm);
 		break;

 	}

 	/*
 	 * at this point, the dummy address is set up to access the selected UPM,
 	 * the MAD pointer is zero, and the MxMR OP is set for writing to RAM
 	 *
 	 * now we simply load the mdr with each word and poke the dummy address.
 	 * the MAD is incremented on each access.
 	 */

 	for (i = 0; i < size; i++) {
 		memctl->memc_mdr = table[i];
 		*dummy = 0;
 	}

 	/* now kill bank 11 */
 	memctl->memc_br11 = 0;
 }

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

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

 	volatile immap_t *immap = (immap_t *) CFG_IMMR;

 	immap->im_clkrst.car_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
 	 */
 #ifdef CFG_RESET_ADDRESS
 	addr = CFG_RESET_ADDRESS;
 #else
 	/*
 	 * note: when CFG_MONITOR_BASE points to a RAM address, CFG_MONITOR_BASE
 	 * - sizeof (ulong) is usually a valid address. Better pick an address
 	 * known to be invalid on your system and assign it to CFG_RESET_ADDRESS.
 	 */
 	addr = CFG_MONITOR_BASE - sizeof (ulong);
 #endif
 	((void (*)(void)) addr) ();
 	return 1;

 }

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

 /*
  * Get timebase clock frequency (like cpu_clk in Hz)
  *
  */
 unsigned long get_tbclk (void)
 {
 	DECLARE_GLOBAL_DATA_PTR;

 	ulong tbclk;

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

 	return (tbclk);
 }

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

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

 	reset_8260_watchdog ((immap_t *) CFG_IMMR);
 	if (re_enable)
 		enable_interrupts ();
 }
 #endif /* CONFIG_WATCHDOG */

 /* ------------------------------------------------------------------------- */
	/*
	* (C) Copyright 2000-2003
	* 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
	*/

	/*
	* CPU specific code for the MPC825x / MPC826x / MPC827x / MPC828x
	*
	* written or collected and sometimes rewritten by
	* Magnus Damm <damm@bitsmart.com>
	*
	* modified by
	* Wolfgang Denk <wd@denx.de>
	*
	* modified for 8260 by
	* Murray Jensen <Murray.Jensen@cmst.csiro.au>
	*
	* added 8260 masks by
	* Marius Groeger <mag@sysgo.de>
	*
	* added HiP7 (824x/827x/8280) processors support by
	* Yuli Barcohen <yuli@arabellasw.com>
	*/

	#include <common.h>
	#include <watchdog.h>
	#include <command.h>
	#include <mpc8260.h>
	#include <asm/processor.h>
	#include <asm/cpm_8260.h>

	int checkcpu (void)
	{
	DECLARE_GLOBAL_DATA_PTR;

	volatile immap_t immap = (immap_t ) CFG_IMMR;
	ulong clock = gd->cpu_clk;
	uint pvr = get_pvr ();
	uint immr, rev, m, k;
	char buf[32];

	puts ("CPU: ");

	switch (pvr) {
	case PVR_8260:
	case PVR_8260_HIP3:
	k = 3;
	break;
	case PVR_8260_HIP4:
	k = 4;
	break;
	case PVR_8260_HIP7R1:
	case PVR_8260_HIP7:
	k = 7;
	break;
	default:
	return -1; /* whoops! not an MPC8260 */
	}
	rev = pvr & 0xff;

	immr = immap->im_memctl.memc_immr;
	if ((immr & IMMR_ISB_MSK) != CFG_IMMR)
	return -1; /* whoops! someone moved the IMMR */

	printf (CPU_ID_STR " (HiP%d Rev %02x, Mask ", k, rev);

	/*
	* the bottom 16 bits of the immr are the Part Number and Mask Number
	* (4-34); the 16 bits at PROFF_REVNUM (0x8af0) in dual port ram is the
	* RISC Microcode Revision Number (13-10).
	* For the 8260, Motorola doesn't include the Microcode Revision
	* in the mask.
	*/
	m = immr & (IMMR_PARTNUM_MSK \| IMMR_MASKNUM_MSK);
	k = ((ushort ) & immap->im_dprambase[PROFF_REVNUM]);

	switch (m) {
	case 0x0000:
	puts ("0.2 2J24M");
	break;
	case 0x0010:
	puts ("A.0 K22A");
	break;
	case 0x0011:
	puts ("A.1 1K22A-XC");
	break;
	case 0x0001:
	puts ("B.1 1K23A");
	break;
	case 0x0021:
	puts ("B.2 2K23A-XC");
	break;
	case 0x0023:
	puts ("B.3 3K23A");
	break;
	case 0x0024:
	puts ("C.2 6K23A");
	break;
	case 0x0060:
	puts ("A.0(A) 2K25A");
	break;
	case 0x0062:
	puts ("B.1 4K25A");
	break;
	case 0x0064:
	puts ("C.0 5K25A");
	break;
	case 0x0A00:
	puts ("0.0 0K49M");
	break;
	case 0x0A01:
	puts ("0.1 1K49M");
	break;
	case 0x0C00:
	case 0x0D00:
	printf ("0.0 0K50M");
	break;
	default:
	printf ("unknown [immr=0x%04x,k=0x%04x]", m, k);
	break;
	}

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

	return 0;
	}

	/* ------------------------------------------------------------------------- */
	/* configures a UPM by writing into the UPM RAM array */
	/* uses bank 11 and a dummy physical address (=BRx_BA_MSK) */
	/* NOTE: the physical address chosen must not overlap into any other area */
	/* mapped by the memory controller because bank 11 has the lowest priority */

	void upmconfig (uint upm, uint * table, uint size)
	{
	volatile immap_t immap = (immap_t ) CFG_IMMR;
	volatile memctl8260_t *memctl = &immap->im_memctl;
	volatile uchar dummy = (uchar ) BRx_BA_MSK; /* set all BA bits */
	uint i;

	/* first set up bank 11 to reference the correct UPM at a dummy address */

	memctl->memc_or11 = ORxU_AM_MSK; /* set all AM bits */

	switch (upm) {

	case UPMA:
	memctl->memc_br11 =
	((uint)dummy & BRx_BA_MSK) \| BRx_PS_32 \| BRx_MS_UPMA \|
	BRx_V;
	memctl->memc_mamr = MxMR_OP_WARR;
	break;

	case UPMB:
	memctl->memc_br11 =
	((uint)dummy & BRx_BA_MSK) \| BRx_PS_32 \| BRx_MS_UPMB \|
	BRx_V;
	memctl->memc_mbmr = MxMR_OP_WARR;
	break;

	case UPMC:
	memctl->memc_br11 =
	((uint)dummy & BRx_BA_MSK) \| BRx_PS_32 \| BRx_MS_UPMC \|
	BRx_V;
	memctl->memc_mcmr = MxMR_OP_WARR;
	break;

	default:
	panic ("upmconfig passed invalid UPM number (%u)\n", upm);
	break;

	}

	/*
	* at this point, the dummy address is set up to access the selected UPM,
	* the MAD pointer is zero, and the MxMR OP is set for writing to RAM
	*
	* now we simply load the mdr with each word and poke the dummy address.
	* the MAD is incremented on each access.
	*/

	for (i = 0; i < size; i++) {
	memctl->memc_mdr = table[i];
	*dummy = 0;
	}

	/* now kill bank 11 */
	memctl->memc_br11 = 0;
	}

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

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

	volatile immap_t immap = (immap_t ) CFG_IMMR;

	immap->im_clkrst.car_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
	*/
	#ifdef CFG_RESET_ADDRESS
	addr = CFG_RESET_ADDRESS;
	#else
	/*
	* note: when CFG_MONITOR_BASE points to a RAM address, CFG_MONITOR_BASE
	* - sizeof (ulong) is usually a valid address. Better pick an address
	* known to be invalid on your system and assign it to CFG_RESET_ADDRESS.
	*/
	addr = CFG_MONITOR_BASE - sizeof (ulong);
	#endif
	((void (*)(void)) addr) ();
	return 1;

	}

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

	/*
	* Get timebase clock frequency (like cpu_clk in Hz)
	*
	*/
	unsigned long get_tbclk (void)
	{
	DECLARE_GLOBAL_DATA_PTR;

	ulong tbclk;

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

	return (tbclk);
	}

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

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

	reset_8260_watchdog ((immap_t *) CFG_IMMR);
	if (re_enable)
	enable_interrupts ();
	}
	#endif /* CONFIG_WATCHDOG */

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