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u-boot/cpu/ppc4xx/cpu.c
Wolfgang Denk 7481266e4e
2005-12-12 16:06:05 +01:00

371 lines
7.6 KiB
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/*
* (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
*
* written or collected and sometimes rewritten by
* Magnus Damm <damm@bitsmart.com>
*
* minor modifications by
* Wolfgang Denk <wd@denx.de>
*/
#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <asm/cache.h>
#include <ppc4xx.h>
#if defined(CONFIG_440)
#define FREQ_EBC (sys_info.freqEPB)
#else
#define FREQ_EBC (sys_info.freqPLB / sys_info.pllExtBusDiv)
#endif
#if defined(CONFIG_405GP) || defined(CONFIG_440EP) || defined(CONFIG_440GR)
#define PCI_ASYNC
int pci_async_enabled(void)
{
#if defined(CONFIG_405GP)
return (mfdcr(strap) & PSR_PCI_ASYNC_EN);
#endif
#if defined(CONFIG_440EP) || defined(CONFIG_440GR)
unsigned long val;
mfsdr(sdr_sdstp1, val);
return (val & SDR0_SDSTP1_PAME_MASK);
#endif
}
#endif
#if defined(CONFIG_PCI) && !defined(CONFIG_IOP480) && !defined(CONFIG_405)
int pci_arbiter_enabled(void)
{
#if defined(CONFIG_405GP)
return (mfdcr(strap) & PSR_PCI_ARBIT_EN);
#endif
#if defined(CONFIG_405EP)
return (mfdcr(cpc0_pci) & CPC0_PCI_ARBIT_EN);
#endif
#if defined(CONFIG_440GP)
return (mfdcr(cpc0_strp1) & CPC0_STRP1_PAE_MASK);
#endif
#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || defined(CONFIG_440GR) || defined(CONFIG_440SP)
unsigned long val;
mfsdr(sdr_sdstp1, val);
return (val & SDR0_SDSTP1_PAE_MASK);
#endif
}
#endif
#if defined(CONFIG_405EP)|| defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
defined(CONFIG_440GX) || defined(CONFIG_440SP)
#define I2C_BOOTROM
int i2c_bootrom_enabled(void)
{
#if defined(CONFIG_405EP)
return (mfdcr(cpc0_boot) & CPC0_BOOT_SEP);
#endif
#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || defined(CONFIG_440GR) || defined(CONFIG_440SP)
unsigned long val;
mfsdr(sdr_sdcs, val);
return (val & SDR0_SDCS_SDD);
#endif
}
#endif
#if defined(CONFIG_440)
static int do_chip_reset(unsigned long sys0, unsigned long sys1);
#endif
int checkcpu (void)
{
#if !defined(CONFIG_405) /* not used on Xilinx 405 FPGA implementations */
DECLARE_GLOBAL_DATA_PTR;
uint pvr = get_pvr();
ulong clock = gd->cpu_clk;
char buf[32];
#if !defined(CONFIG_IOP480)
sys_info_t sys_info;
puts ("CPU: ");
get_sys_info(&sys_info);
puts("AMCC PowerPC 4");
#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_405EP)
puts("05");
#endif
#if defined(CONFIG_440)
puts("40");
#endif
switch (pvr) {
case PVR_405GP_RB:
puts("GP Rev. B");
break;
case PVR_405GP_RC:
puts("GP Rev. C");
break;
case PVR_405GP_RD:
puts("GP Rev. D");
break;
#ifdef CONFIG_405GP
case PVR_405GP_RE: /* 405GP rev E and 405CR rev C have same PVR */
puts("GP Rev. E");
break;
#endif
case PVR_405CR_RA:
puts("CR Rev. A");
break;
case PVR_405CR_RB:
puts("CR Rev. B");
break;
#ifdef CONFIG_405CR
case PVR_405CR_RC: /* 405GP rev E and 405CR rev C have same PVR */
puts("CR Rev. C");
break;
#endif
case PVR_405GPR_RB:
puts("GPr Rev. B");
break;
case PVR_405EP_RB:
puts("EP Rev. B");
break;
#if defined(CONFIG_440)
case PVR_440GP_RB:
puts("GP Rev. B");
/* See errata 1.12: CHIP_4 */
if ((mfdcr(cpc0_sys0) != mfdcr(cpc0_strp0)) ||
(mfdcr(cpc0_sys1) != mfdcr(cpc0_strp1)) ){
puts ( "\n\t CPC0_SYSx DCRs corrupted. "
"Resetting chip ...\n");
udelay( 1000 * 1000 ); /* Give time for serial buf to clear */
do_chip_reset ( mfdcr(cpc0_strp0),
mfdcr(cpc0_strp1) );
}
break;
case PVR_440GP_RC:
puts("GP Rev. C");
break;
case PVR_440GX_RA:
puts("GX Rev. A");
break;
case PVR_440GX_RB:
puts("GX Rev. B");
break;
case PVR_440GX_RC:
puts("GX Rev. C");
break;
case PVR_440GX_RF:
puts("GX Rev. F");
break;
case PVR_440EP_RA:
puts("EP Rev. A");
break;
#ifdef CONFIG_440EP
case PVR_440EP_RB: /* 440EP rev B and 440GR rev A have same PVR */
puts("EP Rev. B");
break;
#endif /* CONFIG_440EP */
#ifdef CONFIG_440GR
case PVR_440GR_RA: /* 440EP rev B and 440GR rev A have same PVR */
puts("GR Rev. A");
break;
#endif /* CONFIG_440GR */
#endif /* CONFIG_440 */
case PVR_440SP_RA:
puts("SP Rev. A");
break;
case PVR_440SP_RB:
puts("SP Rev. B");
break;
default:
printf (" UNKNOWN (PVR=%08x)", pvr);
break;
}
printf (" at %s MHz (PLB=%lu, OPB=%lu, EBC=%lu MHz)\n", strmhz(buf, clock),
sys_info.freqPLB / 1000000,
sys_info.freqPLB / sys_info.pllOpbDiv / 1000000,
FREQ_EBC / 1000000);
#if defined(I2C_BOOTROM)
printf (" I2C boot EEPROM %sabled\n", i2c_bootrom_enabled() ? "en" : "dis");
#endif
#if defined(CONFIG_PCI)
printf (" Internal PCI arbiter %sabled", pci_arbiter_enabled() ? "en" : "dis");
#endif
#if defined(PCI_ASYNC)
if (pci_async_enabled()) {
printf (", PCI async ext clock used");
} else {
printf (", PCI sync clock at %lu MHz",
sys_info.freqPLB / sys_info.pllPciDiv / 1000000);
}
#endif
#if defined(CONFIG_PCI)
putc('\n');
#endif
#if defined(CONFIG_405EP)
printf (" 16 kB I-Cache 16 kB D-Cache");
#elif defined(CONFIG_440)
printf (" 32 kB I-Cache 32 kB D-Cache");
#else
printf (" 16 kB I-Cache %d kB D-Cache",
((pvr | 0x00000001) == PVR_405GPR_RB) ? 16 : 8);
#endif
#endif /* !defined(CONFIG_IOP480) */
#if defined(CONFIG_IOP480)
printf ("PLX IOP480 (PVR=%08x)", pvr);
printf (" at %s MHz:", strmhz(buf, clock));
printf (" %u kB I-Cache", 4);
printf (" %u kB D-Cache", 2);
#endif
#endif /* !defined(CONFIG_405) */
putc ('\n');
return 0;
}
/* ------------------------------------------------------------------------- */
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
#if defined(CONFIG_YOSEMITE) || defined(CONFIG_YELLOWSTONE)
/*give reset to BCSR*/
*(unsigned char*)(CFG_BCSR_BASE | 0x06) = 0x09;
#else
/*
* Initiate system reset in debug control register DBCR
*/
__asm__ __volatile__("lis 3, 0x3000" ::: "r3");
#if defined(CONFIG_440)
__asm__ __volatile__("mtspr 0x134, 3");
#else
__asm__ __volatile__("mtspr 0x3f2, 3");
#endif
#endif/* defined(CONFIG_YOSEMITE) || defined(CONFIG_YELLOWSTONE)*/
return 1;
}
#if defined(CONFIG_440)
static int do_chip_reset (unsigned long sys0, unsigned long sys1)
{
/* Changes to cpc0_sys0 and cpc0_sys1 require chip
* reset.
*/
mtdcr (cntrl0, mfdcr (cntrl0) | 0x80000000); /* Set SWE */
mtdcr (cpc0_sys0, sys0);
mtdcr (cpc0_sys1, sys1);
mtdcr (cntrl0, mfdcr (cntrl0) & ~0x80000000); /* Clr SWE */
mtspr (dbcr0, 0x20000000); /* Reset the chip */
return 1;
}
#endif
/*
* Get timebase clock frequency
*/
unsigned long get_tbclk (void)
{
#if !defined(CONFIG_IOP480)
sys_info_t sys_info;
get_sys_info(&sys_info);
return (sys_info.freqProcessor);
#else
return (66000000);
#endif
}
#if defined(CONFIG_WATCHDOG)
void
watchdog_reset(void)
{
int re_enable = disable_interrupts();
reset_4xx_watchdog();
if (re_enable) enable_interrupts();
}
void
reset_4xx_watchdog(void)
{
/*
* Clear TSR(WIS) bit
*/
mtspr(tsr, 0x40000000);
}
#endif /* CONFIG_WATCHDOG */
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