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/*
* (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;
}
/* ------------------------------------------------------------------------- */
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