318 lines
6.6 KiB
C
318 lines
6.6 KiB
C
/*
|
|
* (C) Copyright 2001
|
|
* Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
|
|
*
|
|
* 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.c
|
|
*
|
|
* CPU specific code
|
|
*
|
|
* written or collected and sometimes rewritten by
|
|
* Magnus Damm <damm@bitsmart.com>
|
|
*
|
|
* minor modifications by
|
|
* Wolfgang Denk <wd@denx.de>
|
|
*
|
|
* more modifications by
|
|
* Josh Huber <huber@mclx.com>
|
|
* added support for the 74xx series of cpus
|
|
* added support for the 7xx series of cpus
|
|
* made the code a little less hard-coded, and more auto-detectish
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <74xx_7xx.h>
|
|
#include <asm/cache.h>
|
|
|
|
#if defined(CONFIG_OF_LIBFDT)
|
|
#include <libfdt.h>
|
|
#include <fdt_support.h>
|
|
#endif
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
cpu_t
|
|
get_cpu_type(void)
|
|
{
|
|
uint pvr = get_pvr();
|
|
cpu_t type;
|
|
|
|
type = CPU_UNKNOWN;
|
|
|
|
switch (PVR_VER(pvr)) {
|
|
case 0x000c:
|
|
type = CPU_7400;
|
|
break;
|
|
case 0x0008:
|
|
type = CPU_750;
|
|
|
|
if (((pvr >> 8) & 0xff) == 0x01) {
|
|
type = CPU_750CX; /* old CX (80100 and 8010x?)*/
|
|
} else if (((pvr >> 8) & 0xff) == 0x22) {
|
|
type = CPU_750CX; /* CX (82201,82202) and CXe (82214) */
|
|
} else if (((pvr >> 8) & 0xff) == 0x33) {
|
|
type = CPU_750CX; /* CXe (83311) */
|
|
} else if (((pvr >> 12) & 0xF) == 0x3) {
|
|
type = CPU_755;
|
|
}
|
|
break;
|
|
|
|
case 0x7000:
|
|
type = CPU_750FX;
|
|
break;
|
|
|
|
case 0x7002:
|
|
type = CPU_750GX;
|
|
break;
|
|
|
|
case 0x800C:
|
|
type = CPU_7410;
|
|
break;
|
|
|
|
case 0x8000:
|
|
type = CPU_7450;
|
|
break;
|
|
|
|
case 0x8001:
|
|
type = CPU_7455;
|
|
break;
|
|
|
|
case 0x8002:
|
|
type = CPU_7457;
|
|
break;
|
|
|
|
case 0x8003:
|
|
type = CPU_7447A;
|
|
break;
|
|
|
|
case 0x8004:
|
|
type = CPU_7448;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return type;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
#if !defined(CONFIG_BAB7xx)
|
|
int checkcpu (void)
|
|
{
|
|
uint type = get_cpu_type();
|
|
uint pvr = get_pvr();
|
|
ulong clock = gd->cpu_clk;
|
|
char buf[32];
|
|
char *str;
|
|
|
|
puts ("CPU: ");
|
|
|
|
switch (type) {
|
|
case CPU_750CX:
|
|
printf ("750CX%s v%d.%d", (pvr&0xf0)?"e":"",
|
|
(pvr>>8) & 0xf,
|
|
pvr & 0xf);
|
|
goto PR_CLK;
|
|
|
|
case CPU_750:
|
|
str = "750";
|
|
break;
|
|
|
|
case CPU_750FX:
|
|
str = "750FX";
|
|
break;
|
|
|
|
case CPU_750GX:
|
|
str = "750GX";
|
|
break;
|
|
|
|
case CPU_755:
|
|
str = "755";
|
|
break;
|
|
|
|
case CPU_7400:
|
|
str = "MPC7400";
|
|
break;
|
|
|
|
case CPU_7410:
|
|
str = "MPC7410";
|
|
break;
|
|
|
|
case CPU_7447A:
|
|
str = "MPC7447A";
|
|
break;
|
|
|
|
case CPU_7448:
|
|
str = "MPC7448";
|
|
break;
|
|
|
|
case CPU_7450:
|
|
str = "MPC7450";
|
|
break;
|
|
|
|
case CPU_7455:
|
|
str = "MPC7455";
|
|
break;
|
|
|
|
case CPU_7457:
|
|
str = "MPC7457";
|
|
break;
|
|
|
|
default:
|
|
printf("Unknown CPU -- PVR: 0x%08x\n", pvr);
|
|
return -1;
|
|
}
|
|
|
|
printf ("%s v%d.%d", str, (pvr >> 8) & 0xFF, pvr & 0xFF);
|
|
PR_CLK:
|
|
printf (" @ %s MHz\n", strmhz(buf, clock));
|
|
|
|
return (0);
|
|
}
|
|
#endif
|
|
/* these two functions are unimplemented currently [josh] */
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* L1 i-cache */
|
|
|
|
int
|
|
checkicache(void)
|
|
{
|
|
return 0; /* XXX */
|
|
}
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
/* L1 d-cache */
|
|
|
|
int
|
|
checkdcache(void)
|
|
{
|
|
return 0; /* XXX */
|
|
}
|
|
|
|
/* -------------------------------------------------------------------- */
|
|
|
|
static inline void
|
|
soft_restart(unsigned long addr)
|
|
{
|
|
/* SRR0 has system reset vector, SRR1 has default MSR value */
|
|
/* rfi restores MSR from SRR1 and sets the PC to the SRR0 value */
|
|
|
|
__asm__ __volatile__ ("mtspr 26, %0" :: "r" (addr));
|
|
__asm__ __volatile__ ("li 4, (1 << 6)" ::: "r4");
|
|
__asm__ __volatile__ ("mtspr 27, 4");
|
|
__asm__ __volatile__ ("rfi");
|
|
|
|
while(1); /* not reached */
|
|
}
|
|
|
|
|
|
#if !defined(CONFIG_PCIPPC2) && \
|
|
!defined(CONFIG_BAB7xx) && \
|
|
!defined(CONFIG_ELPPC) && \
|
|
!defined(CONFIG_PPMC7XX)
|
|
/* no generic way to do board reset. simply call soft_reset. */
|
|
int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
|
{
|
|
ulong addr;
|
|
/* flush and disable I/D cache */
|
|
__asm__ __volatile__ ("mfspr 3, 1008" ::: "r3");
|
|
__asm__ __volatile__ ("ori 5, 5, 0xcc00" ::: "r5");
|
|
__asm__ __volatile__ ("ori 4, 3, 0xc00" ::: "r4");
|
|
__asm__ __volatile__ ("andc 5, 3, 5" ::: "r5");
|
|
__asm__ __volatile__ ("sync");
|
|
__asm__ __volatile__ ("mtspr 1008, 4");
|
|
__asm__ __volatile__ ("isync");
|
|
__asm__ __volatile__ ("sync");
|
|
__asm__ __volatile__ ("mtspr 1008, 5");
|
|
__asm__ __volatile__ ("isync");
|
|
__asm__ __volatile__ ("sync");
|
|
|
|
#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.
|
|
*/
|
|
addr = CONFIG_SYS_MONITOR_BASE - sizeof (ulong);
|
|
#endif
|
|
soft_restart(addr);
|
|
|
|
/* not reached */
|
|
while(1)
|
|
;
|
|
|
|
return 1;
|
|
}
|
|
#endif
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* For the 7400 the TB clock runs at 1/4 the cpu bus speed.
|
|
*/
|
|
#ifndef CONFIG_SYS_BUS_CLK
|
|
#define CONFIG_SYS_BUS_CLK gd->bus_clk
|
|
#endif
|
|
|
|
unsigned long get_tbclk(void)
|
|
{
|
|
return CONFIG_SYS_BUS_CLK / 4;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
#if defined(CONFIG_WATCHDOG)
|
|
#if !defined(CONFIG_PCIPPC2) && !defined(CONFIG_BAB7xx)
|
|
void
|
|
watchdog_reset(void)
|
|
{
|
|
|
|
}
|
|
#endif /* !CONFIG_PCIPPC2 && !CONFIG_BAB7xx */
|
|
#endif /* CONFIG_WATCHDOG */
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
#ifdef CONFIG_OF_LIBFDT
|
|
void ft_cpu_setup(void *blob, bd_t *bd)
|
|
{
|
|
do_fixup_by_prop_u32(blob, "device_type", "cpu", 4,
|
|
"timebase-frequency", bd->bi_busfreq / 4, 1);
|
|
do_fixup_by_prop_u32(blob, "device_type", "cpu", 4,
|
|
"bus-frequency", bd->bi_busfreq, 1);
|
|
do_fixup_by_prop_u32(blob, "device_type", "cpu", 4,
|
|
"clock-frequency", bd->bi_intfreq, 1);
|
|
|
|
fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
|
|
|
|
fdt_fixup_ethernet(blob);
|
|
}
|
|
#endif
|
|
/* ------------------------------------------------------------------------- */
|