/*
 * (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;
}

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