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u-boot/cpu/ppc4xx/cpu.c
Stefan Roese 7372ca6822 [PATCH] Correctly display PCI arbiter en-/disabled on some 4xx boards 
Previously the strapping DCR/SDR was read to determine if the internal PCI
arbiter is enabled or not. This strapping bit can be overridden, so now
the current status is read from the correct DCR/SDR register.

Signed-off-by: Stefan Roese <sr@denx.de>
2007-02-02 12:44:22 +01:00

528 lines
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/*
* (C) Copyright 2000-2006
* 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_405)
DECLARE_GLOBAL_DATA_PTR;
#endif
#if defined(CONFIG_BOARD_RESET)
void board_reset(void);
#endif
#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) || \
defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
#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) || \
defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
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_440SP) || defined(CONFIG_440SPE)
unsigned long val;
mfsdr(sdr_xcr, val);
return (val & 0x80000000);
#endif
#if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
unsigned long val;
mfsdr(sdr_pci0, val);
return (val & 0x80000000);
#endif
}
#endif
#if defined(CONFIG_405EP) || defined(CONFIG_440GX) || \
defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
defined(CONFIG_440SP) || defined(CONFIG_440SPE)
#define I2C_BOOTROM
int i2c_bootrom_enabled(void)
{
#if defined(CONFIG_405EP)
return (mfdcr(cpc0_boot) & CPC0_BOOT_SEP);
#else
unsigned long val;
mfsdr(sdr_sdcs, val);
return (val & SDR0_SDCS_SDD);
#endif
}
#if defined(CONFIG_440GX)
#define SDR0_PINSTP_SHIFT 29
static char *bootstrap_str[] = {
"EBC (16 bits)",
"EBC (8 bits)",
"EBC (32 bits)",
"EBC (8 bits)",
"PCI",
"I2C (Addr 0x54)",
"Reserved",
"I2C (Addr 0x50)",
};
#endif
#if defined(CONFIG_440SP) || defined(CONFIG_440SPE)
#define SDR0_PINSTP_SHIFT 30
static char *bootstrap_str[] = {
"EBC (8 bits)",
"PCI",
"I2C (Addr 0x54)",
"I2C (Addr 0x50)",
};
#endif
#if defined(CONFIG_440EP) || defined(CONFIG_440GR)
#define SDR0_PINSTP_SHIFT 29
static char *bootstrap_str[] = {
"EBC (8 bits)",
"PCI",
"NAND (8 bits)",
"EBC (16 bits)",
"EBC (16 bits)",
"I2C (Addr 0x54)",
"PCI",
"I2C (Addr 0x52)",
};
#endif
#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
#define SDR0_PINSTP_SHIFT 29
static char *bootstrap_str[] = {
"EBC (8 bits)",
"EBC (16 bits)",
"EBC (16 bits)",
"NAND (8 bits)",
"PCI",
"I2C (Addr 0x54)",
"PCI",
"I2C (Addr 0x52)",
};
#endif
#if defined(SDR0_PINSTP_SHIFT)
static int bootstrap_option(void)
{
unsigned long val;
mfsdr(sdr_pinstp, val);
return ((val & 0xe0000000) >> SDR0_PINSTP_SHIFT);
}
#endif /* SDR0_PINSTP_SHIFT */
#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 */
uint pvr = get_pvr();
ulong clock = gd->cpu_clk;
char buf[32];
#if !defined(CONFIG_IOP480)
char addstr[64] = "";
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;
case PVR_440EP_RC: /* 440EP rev C and 440GR rev B have same PVR */
puts("EP Rev. C");
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;
case PVR_440GR_RB: /* 440EP rev C and 440GR rev B have same PVR */
puts("GR Rev. B");
break;
#endif /* CONFIG_440GR */
#endif /* CONFIG_440 */
#ifdef CONFIG_440EPX
case PVR_440EPX1_RA: /* 440EPx rev A and 440GRx rev A have same PVR */
puts("EPx Rev. A");
strcpy(addstr, "Security/Kasumi support");
break;
case PVR_440EPX2_RA: /* 440EPx rev A and 440GRx rev A have same PVR */
puts("EPx Rev. A");
strcpy(addstr, "No Security/Kasumi support");
break;
#endif /* CONFIG_440EPX */
#ifdef CONFIG_440GRX
case PVR_440GRX1_RA: /* 440EPx rev A and 440GRx rev A have same PVR */
puts("GRx Rev. A");
strcpy(addstr, "Security/Kasumi support");
break;
case PVR_440GRX2_RA: /* 440EPx rev A and 440GRx rev A have same PVR */
puts("GRx Rev. A");
strcpy(addstr, "No Security/Kasumi support");
break;
#endif /* CONFIG_440GRX */
case PVR_440SP_6_RAB:
puts("SP Rev. A/B");
strcpy(addstr, "RAID 6 support");
break;
case PVR_440SP_RAB:
puts("SP Rev. A/B");
strcpy(addstr, "No RAID 6 support");
break;
case PVR_440SP_6_RC:
puts("SP Rev. C");
strcpy(addstr, "RAID 6 support");
break;
case PVR_440SP_RC:
puts("SP Rev. C");
strcpy(addstr, "No RAID 6 support");
break;
case PVR_440SPe_6_RA:
puts("SPe Rev. A");
strcpy(addstr, "RAID 6 support");
break;
case PVR_440SPe_RA:
puts("SPe Rev. A");
strcpy(addstr, "No RAID 6 support");
break;
case PVR_440SPe_6_RB:
puts("SPe Rev. B");
strcpy(addstr, "RAID 6 support");
break;
case PVR_440SPe_RB:
puts("SPe Rev. B");
strcpy(addstr, "No RAID 6 support");
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 (addstr[0] != 0)
printf(" %s\n", addstr);
#if defined(I2C_BOOTROM)
printf (" I2C boot EEPROM %sabled\n", i2c_bootrom_enabled() ? "en" : "dis");
#if defined(SDR0_PINSTP_SHIFT)
printf (" Bootstrap Option %c - ", (char)bootstrap_option() + 'A');
printf ("Boot ROM Location %s\n", bootstrap_str[bootstrap_option()]);
#endif /* SDR0_PINSTP_SHIFT */
#endif /* I2C_BOOTROM */
#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;
}
#if defined (CONFIG_440SPE)
int ppc440spe_revB() {
unsigned int pvr;
pvr = get_pvr();
if ((pvr == PVR_440SPe_6_RB) || (pvr == PVR_440SPe_RB))
return 1;
else
return 0;
}
#endif
/* ------------------------------------------------------------------------- */
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
#if defined(CONFIG_BOARD_RESET)
board_reset();
#else
#if defined(CFG_4xx_RESET_TYPE)
mtspr(dbcr0, CFG_4xx_RESET_TYPE << 28);
#else
/*
* Initiate system reset in debug control register DBCR
*/
mtspr(dbcr0, 0x30000000);
#endif /* defined(CFG_4xx_RESET_TYPE) */
#endif /* defined(CONFIG_BOARD_RESET) */
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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