text: /*
   * (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 <config.h>
  #include <mpc824x.h>
  #include <common.h>
  #include <command.h>
  
  DECLARE_GLOBAL_DATA_PTR;
  
  int checkcpu (void)
  {
  	unsigned int pvr = get_pvr ();
  	unsigned int version = pvr >> 16;
  	unsigned char revision;
  	ulong clock = gd->cpu_clk;
  	char buf[32];
  
  	puts ("CPU:   ");
  
  	switch (version) {
  	case CPU_TYPE_8240:
  		puts ("MPC8240");
  		break;
  
  	case CPU_TYPE_8245:
  		puts ("MPC8245");
  		break;
  
  	default:
  		return -1;		/*not valid for this source */
  	}
  
  	CONFIG_READ_BYTE (REVID, revision);
  
  	if (revision) {
  		printf (" Revision %d.%d",
  			(revision & 0xf0) >> 4,
  			(revision & 0x0f));
  	} else {
  		return -1;		/* no valid CPU revision info */
  	}
  
  	printf (" at %s MHz:", strmhz (buf, clock));
  
  	printf (" %u kB I-Cache", checkicache () >> 10);
  	printf (" %u kB D-Cache", checkdcache () >> 10);
  
  	puts ("\n");
  
  	return 0;
  }
  
  /* ------------------------------------------------------------------------- */
  /* L1 i-cache                                                                */
  
  int checkicache (void)
  {
  	 /*TODO*/
  	 return 128 * 4 * 32;
  };
  
  /* ------------------------------------------------------------------------- */
  /* L1 d-cache                                                                */
  
  int checkdcache (void)
  {
  	 /*TODO*/
  	 return 128 * 4 * 32;
  
  };
  
  /*------------------------------------------------------------------- */
  
  int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  {
  	ulong msr, addr;
  
  	/* Interrupts and MMU off */
  	__asm__ ("mtspr    81, 0");
  
  	/* Interrupts and MMU off */
  	__asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);
  
  	msr &= ~0x1030;
  	__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 CONFIG_SYS_RESET_ADDRESS
  	addr = CONFIG_SYS_RESET_ADDRESS;
  #else
  	/*
  	 * note: when CONFIG_SYS_MONITOR_BASE points to a RAM address,
  	 * CONFIG_SYS_MONITOR_BASE - sizeof (ulong) is usually a valid
  	 * address. Better pick an address known to be invalid on
  	 * your system and assign it to CONFIG_SYS_RESET_ADDRESS.
  	 * "(ulong)-1" used to be a good choice for many systems...
  	 */
  	addr = CONFIG_SYS_MONITOR_BASE - sizeof (ulong);
  #endif
  	((void (*)(void)) addr) ();
  	return 1;
  
  }
  
  /* ------------------------------------------------------------------------- */
  
  /*
   * Get timebase clock frequency (like cpu_clk in Hz)
   * This is the sys_logic_clk (memory bus) divided by 4
   */
  unsigned long get_tbclk (void)
  {
  	return ((get_bus_freq (0) + 2L) / 4L);
  }
  
  /* ------------------------------------------------------------------------- */
  
  /*
   * The MPC824x has an integrated PCI controller known as the MPC107.
   * The following are MPC107 Bridge Controller and PCI Support functions
   *
   */
  
  /*
   *  This procedure reads a 32-bit address MPC107 register, and returns
   *  a 32 bit value.  It swaps the address to little endian before
   *  writing it to config address, and swaps the value to big endian
   *  before returning to the caller.
   */
  unsigned int mpc824x_mpc107_getreg (unsigned int regNum)
  {
  	unsigned int temp;
  
  	/* swap the addr. to little endian */
  	*(volatile unsigned int *) CHRP_REG_ADDR = PCISWAP (regNum);
  	temp = *(volatile unsigned int *) CHRP_REG_DATA;
  	return PCISWAP (temp);		/* swap the data upon return */
  }
  
  /*
   *  This procedure writes a 32-bit address MPC107 register.  It swaps
   *  the address to little endian before writing it to config address.
   */
  
  void mpc824x_mpc107_setreg (unsigned int regNum, unsigned int regVal)
  {
  	/* swap the addr. to little endian */
  	*(volatile unsigned int *) CHRP_REG_ADDR = PCISWAP (regNum);
  	*(volatile unsigned int *) CHRP_REG_DATA = PCISWAP (regVal);
  	return;
  }
  
  
  /*
   *  Write a byte (8 bits) to a memory location.
   */
  void mpc824x_mpc107_write8 (unsigned int addr, unsigned char data)
  {
  	*(unsigned char *) addr = data;
  	__asm__ ("sync");
  }
  
  /*
   *  Write a word (16 bits) to a memory location after the value
   *  has been byte swapped (big to little endian or vice versa)
   */
  
  void mpc824x_mpc107_write16 (unsigned int address, unsigned short data)
  {
  	*(volatile unsigned short *) address = BYTE_SWAP_16_BIT (data);
  	__asm__ ("sync");
  }
  
  /*
   *  Write a long word (32 bits) to a memory location after the value
   *  has been byte swapped (big to little endian or vice versa)
   */
  
  void mpc824x_mpc107_write32 (unsigned int address, unsigned int data)
  {
  	*(volatile unsigned int *) address = LONGSWAP (data);
  	__asm__ ("sync");
  }
  
  /*
   *  Read a byte (8 bits) from a memory location.
   */
  unsigned char mpc824x_mpc107_read8 (unsigned int addr)
  {
  	return *(volatile unsigned char *) addr;
  }
  
  
  /*
   *  Read a word (16 bits) from a memory location, and byte swap the
   *  value before returning to the caller.
   */
  unsigned short mpc824x_mpc107_read16 (unsigned int address)
  {
  	unsigned short retVal;
  
  	retVal = BYTE_SWAP_16_BIT (*(unsigned short *) address);
  	return retVal;
  }
  
  
  /*
   *  Read a long word (32 bits) from a memory location, and byte
   *  swap the value before returning to the caller.
   */
  unsigned int mpc824x_mpc107_read32 (unsigned int address)
  {
  	unsigned int retVal;
  
  	retVal = LONGSWAP (*(unsigned int *) address);
  	return (retVal);
  }
  
  
  /*
   *  Read a register in the Embedded Utilities Memory Block address
   *  space.
   *  Input: regNum - register number + utility base address.  Example,
   *         the base address of EPIC is 0x40000, the register number
   *	   being passed is 0x40000+the address of the target register.
   *	   (See epic.h for register addresses).
   *  Output:  The 32 bit little endian value of the register.
   */
  
  unsigned int mpc824x_eummbar_read (unsigned int regNum)
  {
  	unsigned int temp;
  
  	temp = *(volatile unsigned int *) (EUMBBAR_VAL + regNum);
  	temp = PCISWAP (temp);
  	return temp;
  }
  
  
  /*
   *  Write a value to a register in the Embedded Utilities Memory
   *  Block address space.
   *  Input: regNum - register number + utility base address.  Example,
   *                  the base address of EPIC is 0x40000, the register
   *	            number is 0x40000+the address of the target register.
   *	            (See epic.h for register addresses).
   *         regVal - value to be written to the register.
   */
  
  void mpc824x_eummbar_write (unsigned int regNum, unsigned int regVal)
  {
  	*(volatile unsigned int *) (EUMBBAR_VAL + regNum) = PCISWAP (regVal);
  	return;
  }
  
  /* ------------------------------------------------------------------------- */
  