cpu_init.c

u-boot-1.1.6 源码包

/*
 * (C) Copyright 2000
 * Rob Taylor. Flying Pig Systems. [e-mail].
 *
 * 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 <mpc824x.h>

#ifndef CFG_BANK0_ROW
#define CFG_BANK0_ROW 0
#endif
#ifndef CFG_BANK1_ROW
#define CFG_BANK1_ROW 0
#endif
#ifndef CFG_BANK2_ROW
#define CFG_BANK2_ROW 0
#endif
#ifndef CFG_BANK3_ROW
#define CFG_BANK3_ROW 0
#endif
#ifndef CFG_BANK4_ROW
#define CFG_BANK4_ROW 0
#endif
#ifndef CFG_BANK5_ROW
#define CFG_BANK5_ROW 0
#endif
#ifndef CFG_BANK6_ROW
#define CFG_BANK6_ROW 0
#endif
#ifndef CFG_BANK7_ROW
#define CFG_BANK7_ROW 0
#endif
#ifndef CFG_DBUS_SIZE2
#define CFG_DBUS_SIZE2 0
#endif

/*
 * Breath some life into the CPU...
 *
 * Set up the memory map,
 * initialize a bunch of registers,
 */
void
cpu_init_f (void)
{
/* MOUSSE board is initialized in asm */
#if !defined(CONFIG_MOUSSE) && !defined(CONFIG_BMW)
    register unsigned long val;
    CONFIG_WRITE_HALFWORD(PCICR, 0x06); /* Bus Master, respond to PCI memory space acesses*/
/*    CONFIG_WRITE_HALFWORD(PCISR, 0xffff); */ /*reset PCISR*/

#if defined(CONFIG_MUSENKI) || defined(CONFIG_PN62)
/* Why is this here, you ask?  Try, just try setting 0x8000
 * in PCIACR with CONFIG_WRITE_HALFWORD()
 * this one was a stumper, and we are annoyed
 */

#define M_CONFIG_WRITE_HALFWORD( addr, data ) \
	__asm__ __volatile__("		\
		stw  %2,0(%0)\n		\
		sync\n			\
		sth  %3,2(%1)\n		\
		sync\n			\
		"			\
		: /* no output */	\
		: "r" (CONFIG_ADDR), "r" (CONFIG_DATA),			\
		"r" (PCISWAP(addr & ~3)), "r" (PCISWAP(data << 16))	\
	);

	M_CONFIG_WRITE_HALFWORD(PCIACR, 0x8000);
#endif

	CONFIG_WRITE_BYTE(PCLSR, 0x8);	/* set PCI cache line size */
	CONFIG_WRITE_BYTE (PLTR, 0x40); /* set PCI latency timer */
	/*
	* Note that although this bit is cleared after a hard reset, it
	* must be explicitly set and then cleared by software during
	* initialization in order to guarantee correct operation of the
	* DLL and the SDRAM_CLK[0:3] signals (if they are used).
	*/
	CONFIG_READ_BYTE (AMBOR, val);
	CONFIG_WRITE_BYTE(AMBOR, val & 0xDF);
	CONFIG_WRITE_BYTE(AMBOR, val | 0x20);
	CONFIG_WRITE_BYTE(AMBOR, val & 0xDF);
#ifdef CONFIG_MPC8245
	/* silicon bug 28 MPC8245 */
	CONFIG_READ_BYTE(AMBOR,val);
	CONFIG_WRITE_BYTE(AMBOR,val|0x1);

#if 0
	/*
	 * The following bug only affects older (XPC8245) processors.
	 * DMA transfers initiated by external devices get corrupted due
	 * to a hardware scheduling problem.
	 *
	 * The effect is:
	 * when transferring X words, the first 32 words are transferred
	 * OK, the next 3 x 32 words are 'old' data (from previous DMA)
	 * while the rest of the X words is xferred fine.
	 *
	 * Disabling 3 of the 4 32 word hardware buffers solves the problem
	 * with no significant performance loss.
	 */

	CONFIG_READ_BYTE(PCMBCR,val);
	/* in order not to corrupt data which is being read over the PCI bus
	* with the PPC as slave, we need to reduce the number of PCMRBs to 1,
	* 4.11 in the  processor user manual
	* */

#if 1
	CONFIG_WRITE_BYTE(PCMBCR,(val|0xC0)); /* 1 PCMRB */
#else
	CONFIG_WRITE_BYTE(PCMBCR,(val|0x80)); /* 2 PCMRBs */
	CONFIG_WRITE_BYTE(PCMBCR,(val|0x40)); /* 3 PCMRBs */
	/* default, 4 PCMRBs are used */
#endif
#endif
#endif

	CONFIG_READ_WORD(PICR1, val);
#if defined(CONFIG_MPC8240)
	CONFIG_WRITE_WORD( PICR1,
		(val & (PICR1_ADDRESS_MAP | PICR1_RCS0)) |
		       PIRC1_MSK | PICR1_PROC_TYPE_603E |
		       PICR1_FLASH_WR_EN | PICR1_MCP_EN |
		       PICR1_CF_DPARK | PICR1_EN_PCS |
		       PICR1_CF_APARK );
#elif defined(CONFIG_MPC8245)
	CONFIG_WRITE_WORD( PICR1,
		(val & (PICR1_RCS0)) |
		       PICR1_PROC_TYPE_603E |
		       PICR1_FLASH_WR_EN | PICR1_MCP_EN |
		       PICR1_CF_DPARK | PICR1_NO_BUSW_CK |
		       PICR1_DEC| PICR1_CF_APARK | 0x10); /* 8245 UM says bit 4 must be set */
#else
#error Specific type of MPC824x must be defined (i.e. CONFIG_MPC8240)
#endif

	CONFIG_READ_WORD(PICR2, val);
	val= val & ~ (PICR2_CF_SNOOP_WS_MASK | PICR2_CF_APHASE_WS_MASK); /*mask off waitstate bits*/
#ifndef CONFIG_PN62
	val |= PICR2_CF_SNOOP_WS_1WS | PICR2_CF_APHASE_WS_1WS; /*1 wait state*/
#endif
	CONFIG_WRITE_WORD(PICR2, val);

	CONFIG_WRITE_WORD(EUMBBAR, CFG_EUMB_ADDR);
#ifndef CFG_RAMBOOT
	CONFIG_WRITE_WORD(MCCR1, (CFG_ROMNAL << MCCR1_ROMNAL_SHIFT) |
				 (CFG_BANK0_ROW) |
				 (CFG_BANK1_ROW << MCCR1_BANK1ROW_SHIFT) |
				 (CFG_BANK2_ROW << MCCR1_BANK2ROW_SHIFT) |
				 (CFG_BANK3_ROW << MCCR1_BANK3ROW_SHIFT) |
				 (CFG_BANK4_ROW << MCCR1_BANK4ROW_SHIFT) |
				 (CFG_BANK5_ROW << MCCR1_BANK5ROW_SHIFT) |
				 (CFG_BANK6_ROW << MCCR1_BANK6ROW_SHIFT) |
				 (CFG_BANK7_ROW << MCCR1_BANK7ROW_SHIFT) |
				 (CFG_ROMFAL << MCCR1_ROMFAL_SHIFT));
#endif

#if defined(CFG_ASRISE) && defined(CFG_ASFALL)
	CONFIG_WRITE_WORD(MCCR2, CFG_REFINT << MCCR2_REFINT_SHIFT |
				 CFG_ASRISE << MCCR2_ASRISE_SHIFT |
				 CFG_ASFALL << MCCR2_ASFALL_SHIFT);
#else
	CONFIG_WRITE_WORD(MCCR2, CFG_REFINT << MCCR2_REFINT_SHIFT);
#endif

#if defined(CONFIG_MPC8240)
	CONFIG_WRITE_WORD(MCCR3,
		(((CFG_BSTOPRE & 0x003c) >> 2) << MCCR3_BSTOPRE2TO5_SHIFT) |
		(CFG_REFREC << MCCR3_REFREC_SHIFT) |
		(CFG_RDLAT  << MCCR3_RDLAT_SHIFT));
#elif defined(CONFIG_MPC8245)
	CONFIG_WRITE_WORD(MCCR3,
		(((CFG_BSTOPRE & 0x003c) >> 2) << MCCR3_BSTOPRE2TO5_SHIFT) |
		(CFG_REFREC << MCCR3_REFREC_SHIFT));
#else
#error Specific type of MPC824x must be defined (i.e. CONFIG_MPC8240)
#endif

/* this is gross.  We think these should all be the same, and various boards
 *  should define CFG_ACTORW to 0 if they don't want to set it, or even, if
 *  its not set, we define it to zero in this file
 */
#if defined(CONFIG_CU824) || defined(CONFIG_PN62)
	CONFIG_WRITE_WORD(MCCR4,
	(CFG_PRETOACT << MCCR4_PRETOACT_SHIFT) |
	(CFG_ACTTOPRE << MCCR4_ACTTOPRE_SHIFT) |
	MCCR4_BIT21 |
	(CFG_REGISTERD_TYPE_BUFFER ? MCCR4_REGISTERED: 0) |
	((CFG_BSTOPRE & 0x0003) <<MCCR4_BSTOPRE0TO1_SHIFT ) |
	(((CFG_SDMODE_CAS_LAT <<4) | (CFG_SDMODE_WRAP <<3) |
		  CFG_SDMODE_BURSTLEN) << MCCR4_SDMODE_SHIFT) |
	(CFG_ACTORW << MCCR4_ACTTORW_SHIFT) |
	(((CFG_BSTOPRE & 0x03c0) >> 6) << MCCR4_BSTOPRE6TO9_SHIFT));
#elif defined(CONFIG_MPC8240)
	CONFIG_WRITE_WORD(MCCR4,
	(CFG_PRETOACT << MCCR4_PRETOACT_SHIFT) |
	(CFG_ACTTOPRE << MCCR4_ACTTOPRE_SHIFT) |
	MCCR4_BIT21 |
	(CFG_REGISTERD_TYPE_BUFFER ? MCCR4_REGISTERED: 0) |
	((CFG_BSTOPRE & 0x0003) <<MCCR4_BSTOPRE0TO1_SHIFT ) |
	(((CFG_SDMODE_CAS_LAT <<4) | (CFG_SDMODE_WRAP <<3) |
		  (CFG_SDMODE_BURSTLEN)) <<MCCR4_SDMODE_SHIFT) |
	(((CFG_BSTOPRE & 0x03c0) >> 6) <<MCCR4_BSTOPRE6TO9_SHIFT ));
#elif defined(CONFIG_MPC8245)
	CONFIG_READ_WORD(MCCR1, val);
	val &= MCCR1_DBUS_SIZE0;    /* test for 64-bit mem bus */

	CONFIG_WRITE_WORD(MCCR4,
		(CFG_PRETOACT << MCCR4_PRETOACT_SHIFT) |
		(CFG_ACTTOPRE << MCCR4_ACTTOPRE_SHIFT) |
		(CFG_EXTROM ? MCCR4_EXTROM : 0) |
		(CFG_REGDIMM ? MCCR4_REGDIMM : 0) |
		(CFG_REGISTERD_TYPE_BUFFER ? MCCR4_REGISTERED: 0) |
		((CFG_BSTOPRE & 0x0003) <<MCCR4_BSTOPRE0TO1_SHIFT ) |
		(CFG_DBUS_SIZE2 << MCCR4_DBUS_SIZE2_SHIFT) |
		(((CFG_SDMODE_CAS_LAT <<4) | (CFG_SDMODE_WRAP <<3) |
		      (val ? 2 : 3)) << MCCR4_SDMODE_SHIFT)  |
		(CFG_ACTORW << MCCR4_ACTTORW_SHIFT) |
		(((CFG_BSTOPRE & 0x03c0) >> 6) <<MCCR4_BSTOPRE6TO9_SHIFT ));
#else
#error Specific type of MPC824x must be defined (i.e. CONFIG_MPC8240)
#endif

	CONFIG_WRITE_WORD(MSAR1,
		( (CFG_BANK0_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) |
		(((CFG_BANK1_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 8) |
		(((CFG_BANK2_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 16) |
		(((CFG_BANK3_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 24));
	CONFIG_WRITE_WORD(EMSAR1,
		( (CFG_BANK0_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) |
		(((CFG_BANK1_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 8) |
		(((CFG_BANK2_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 16) |
		(((CFG_BANK3_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 24));
	CONFIG_WRITE_WORD(MSAR2,
		( (CFG_BANK4_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) |
		(((CFG_BANK5_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 8) |
		(((CFG_BANK6_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 16) |
		(((CFG_BANK7_START & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 24));
	CONFIG_WRITE_WORD(EMSAR2,
		( (CFG_BANK4_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) |
		(((CFG_BANK5_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 8) |
		(((CFG_BANK6_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 16) |
		(((CFG_BANK7_START & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 24));
	CONFIG_WRITE_WORD(MEAR1,
		( (CFG_BANK0_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) |
		(((CFG_BANK1_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 8) |
		(((CFG_BANK2_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 16) |
		(((CFG_BANK3_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 24));
	CONFIG_WRITE_WORD(EMEAR1,
		( (CFG_BANK0_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) |
		(((CFG_BANK1_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 8) |
		(((CFG_BANK2_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 16) |
		(((CFG_BANK3_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 24));
	CONFIG_WRITE_WORD(MEAR2,
		( (CFG_BANK4_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) |
		(((CFG_BANK5_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 8) |
		(((CFG_BANK6_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 16) |
		(((CFG_BANK7_END & MICR_ADDR_MASK) >> MICR_ADDR_SHIFT) << 24));
	CONFIG_WRITE_WORD(EMEAR2,
		( (CFG_BANK4_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) |
		(((CFG_BANK5_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 8) |
		(((CFG_BANK6_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 16) |
		(((CFG_BANK7_END & MICR_EADDR_MASK) >> MICR_EADDR_SHIFT) << 24));

	CONFIG_WRITE_BYTE(ODCR, CFG_ODCR);
#ifdef CFG_DLL_MAX_DELAY
	CONFIG_WRITE_BYTE(MIOCR1, CFG_DLL_MAX_DELAY);	/* needed to make DLL lock */
#endif
#if defined(CFG_DLL_EXTEND) && defined(CFG_PCI_HOLD_DEL)
	CONFIG_WRITE_BYTE(PMCR2, CFG_DLL_EXTEND | CFG_PCI_HOLD_DEL);
#endif
#if defined(MIOCR2) && defined(CFG_SDRAM_DSCD)
	CONFIG_WRITE_BYTE(MIOCR2, CFG_SDRAM_DSCD);	/* change memory input */
#endif /* setup & hold time */

	CONFIG_WRITE_BYTE(MBER,
		 CFG_BANK0_ENABLE |
		(CFG_BANK1_ENABLE << 1) |
		(CFG_BANK2_ENABLE << 2) |
		(CFG_BANK3_ENABLE << 3) |
		(CFG_BANK4_ENABLE << 4) |
		(CFG_BANK5_ENABLE << 5) |
		(CFG_BANK6_ENABLE << 6) |
		(CFG_BANK7_ENABLE << 7));

#ifdef CFG_PGMAX
	CONFIG_WRITE_BYTE(MPMR, CFG_PGMAX);
#endif

	/* ! Wait 200us before initialize other registers */
	/*FIXME: write a decent udelay wait */
	__asm__ __volatile__(
		" mtctr	%0 \n \
		0: bdnz	 0b\n"
		:
		: "r" (0x10000));

	CONFIG_READ_WORD(MCCR1, val);
	CONFIG_WRITE_WORD(MCCR1, val | MCCR1_MEMGO); /* set memory access going */
	__asm__ __volatile__("eieio");

#endif /* !CONFIG_MOUSSE && !CONFIG_BMW */
}


#ifdef CONFIG_MOUSSE
#ifdef INCLUDE_MPC107_REPORT
struct MPC107_s {
	unsigned int iobase;
	char desc[120];
} MPC107Regs[] = {
	{ BMC_BASE +  0x00, "MPC107 Vendor/Device ID"		},
	{ BMC_BASE +  0x04, "MPC107 PCI Command/Status Register" },
	{ BMC_BASE +  0x08, "MPC107 Revision"			},
	{ BMC_BASE +  0x0C, "MPC107 Cache Line Size"		},
	{ BMC_BASE +  0x10, "MPC107 LMBAR"			},
	{ BMC_BASE +  0x14, "MPC824x PCSR"			},
	{ BMC_BASE +  0xA8, "MPC824x PICR1"			},
	{ BMC_BASE +  0xAC, "MPC824x PICR2"			},
	{ BMC_BASE +  0x46, "MPC824x PACR"			},
	{ BMC_BASE + 0x310, "MPC824x ITWR"			},
	{ BMC_BASE + 0x300, "MPC824x OMBAR"			},
	{ BMC_BASE + 0x308, "MPC824x OTWR"			},
	{ BMC_BASE +  0x14, "MPC107 Peripheral Control and Status Register" },
	{ BMC_BASE + 0x78, "MPC107 EUMBAR"			},
	{ BMC_BASE + 0xC0, "MPC107 Processor Bus Error Status"	},
	{ BMC_BASE + 0xC4, "MPC107 PCI Bus Error Status"	},
	{ BMC_BASE + 0xC8, "MPC107 Processor/PCI Error Address"	},
	{ BMC_BASE + 0xE0, "MPC107 AMBOR Register"		},
	{ BMC_BASE + 0xF0, "MPC107 MCCR1 Register"		},
	{ BMC_BASE + 0xF4, "MPC107 MCCR2 Register"		},
	{ BMC_BASE + 0xF8, "MPC107 MCCR3 Register"		},
	{ BMC_BASE + 0xFC, "MPC107 MCCR4 Register"		},
};
#define N_MPC107_Regs	(sizeof(MPC107Regs)/sizeof(MPC107Regs[0]))
#endif /* INCLUDE_MPC107_REPORT */
#endif /* CONFIG_MOUSSE */

/*
 * initialize higher level parts of CPU like time base and timers
 */
int cpu_init_r (void)
{
#ifdef CONFIG_MOUSSE
#ifdef INCLUDE_MPC107_REPORT
	unsigned int tmp = 0, i;
#endif
	/*
	 * Initialize the EUMBBAR (Embedded Util Mem Block Base Addr Reg).
	 * This is necessary before the EPIC, DMA ctlr, I2C ctlr, etc. can
	 * be accessed.
	 */

#ifdef CONFIG_MPC8240			/* only on MPC8240 */
	mpc824x_mpc107_setreg (EUMBBAR, EUMBBAR_VAL);
	/* MOT/SPS: Issue #10002, PCI (FD Alias enable) */
	mpc824x_mpc107_setreg (AMBOR, 0x000000C0);
#endif


#ifdef INCLUDE_MPC107_REPORT
	/* Check MPC824x PCI Device and Vendor ID */
	while ((tmp = mpc824x_mpc107_getreg (BMC_BASE)) != 0x31057) {
		printf ("	MPC107: offset=0x%x, val = 0x%x\n",
			BMC_BASE,
			tmp);
	}

	for (i = 0; i < N_MPC107_Regs; i++) {
		printf ("	0x%x/%s = 0x%x\n",
			MPC107Regs[i].iobase,
			MPC107Regs[i].desc,
			mpc824x_mpc107_getreg (MPC107Regs[i].iobase));
	}

	printf ("IBAT0L = 0x%08X\n", mfspr (IBAT0L));
	printf ("IBAT0U = 0x%08X\n", mfspr (IBAT0U));
	printf ("IBAT1L = 0x%08X\n", mfspr (IBAT1L));
	printf ("IBAT1U = 0x%08X\n", mfspr (IBAT1U));
	printf ("IBAT2L = 0x%08X\n", mfspr (IBAT2L));
	printf ("IBAT2U = 0x%08X\n", mfspr (IBAT2U));
	printf ("IBAT3L = 0x%08X\n", mfspr (IBAT3L));
	printf ("IBAT3U = 0x%08X\n", mfspr (IBAT3U));
	printf ("DBAT0L = 0x%08X\n", mfspr (DBAT0L));
	printf ("DBAT0U = 0x%08X\n", mfspr (DBAT0U));
	printf ("DBAT1L = 0x%08X\n", mfspr (DBAT1L));
	printf ("DBAT1U = 0x%08X\n", mfspr (DBAT1U));
	printf ("DBAT2L = 0x%08X\n", mfspr (DBAT2L));
	printf ("DBAT2U = 0x%08X\n", mfspr (DBAT2U));
	printf ("DBAT3L = 0x%08X\n", mfspr (DBAT3L));
	printf ("DBAT3U = 0x%08X\n", mfspr (DBAT3U));
#endif /* INCLUDE_MPC107_REPORT */
#endif /* CONFIG_MOUSSE */
	return (0);
}