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u-boot/cpu/ppc4xx/cpu_init.c

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/*
* (C) Copyright 2000
* 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 <common.h>
#include <watchdog.h>
#include <ppc4xx_enet.h>
#include <asm/processor.h>
#include <ppc4xx.h>
#if defined(CONFIG_405GP) || defined(CONFIG_405EP)
DECLARE_GLOBAL_DATA_PTR;
#endif
#define mtebc(reg, data) mtdcr(ebccfga,reg);mtdcr(ebccfgd,data)
#ifdef CFG_INIT_DCACHE_CS
# if (CFG_INIT_DCACHE_CS == 0)
# define PBxAP pb0ap
# define PBxCR pb0cr
# if (defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR))
# define PBxAP_VAL CFG_EBC_PB0AP
# define PBxCR_VAL CFG_EBC_PB0CR
# endif
# endif
# if (CFG_INIT_DCACHE_CS == 1)
# define PBxAP pb1ap
# define PBxCR pb1cr
# if (defined(CFG_EBC_PB1AP) && defined(CFG_EBC_PB1CR))
# define PBxAP_VAL CFG_EBC_PB1AP
# define PBxCR_VAL CFG_EBC_PB1CR
# endif
# endif
# if (CFG_INIT_DCACHE_CS == 2)
# define PBxAP pb2ap
# define PBxCR pb2cr
# if (defined(CFG_EBC_PB2AP) && defined(CFG_EBC_PB2CR))
# define PBxAP_VAL CFG_EBC_PB2AP
# define PBxCR_VAL CFG_EBC_PB2CR
# endif
# endif
# if (CFG_INIT_DCACHE_CS == 3)
# define PBxAP pb3ap
# define PBxCR pb3cr
# if (defined(CFG_EBC_PB3AP) && defined(CFG_EBC_PB3CR))
# define PBxAP_VAL CFG_EBC_PB3AP
# define PBxCR_VAL CFG_EBC_PB3CR
# endif
# endif
# if (CFG_INIT_DCACHE_CS == 4)
# define PBxAP pb4ap
# define PBxCR pb4cr
# if (defined(CFG_EBC_PB4AP) && defined(CFG_EBC_PB4CR))
# define PBxAP_VAL CFG_EBC_PB4AP
# define PBxCR_VAL CFG_EBC_PB4CR
# endif
# endif
# if (CFG_INIT_DCACHE_CS == 5)
# define PBxAP pb5ap
# define PBxCR pb5cr
# if (defined(CFG_EBC_PB5AP) && defined(CFG_EBC_PB5CR))
# define PBxAP_VAL CFG_EBC_PB5AP
# define PBxCR_VAL CFG_EBC_PB5CR
# endif
# endif
# if (CFG_INIT_DCACHE_CS == 6)
# define PBxAP pb6ap
# define PBxCR pb6cr
# if (defined(CFG_EBC_PB6AP) && defined(CFG_EBC_PB6CR))
# define PBxAP_VAL CFG_EBC_PB6AP
# define PBxCR_VAL CFG_EBC_PB6CR
# endif
# endif
# if (CFG_INIT_DCACHE_CS == 7)
# define PBxAP pb7ap
# define PBxCR pb7cr
# if (defined(CFG_EBC_PB7AP) && defined(CFG_EBC_PB7CR))
# define PBxAP_VAL CFG_EBC_PB7AP
# define PBxCR_VAL CFG_EBC_PB7CR
# endif
# endif
#endif /* CFG_INIT_DCACHE_CS */
/*
* Breath some life into the CPU...
*
* Set up the memory map,
* initialize a bunch of registers
*/
void
cpu_init_f (void)
{
#if defined(CONFIG_405EP)
/*
* GPIO0 setup (select GPIO or alternate function)
*/
out32(GPIO0_OSRH, CFG_GPIO0_OSRH); /* output select */
out32(GPIO0_OSRL, CFG_GPIO0_OSRL);
out32(GPIO0_ISR1H, CFG_GPIO0_ISR1H); /* input select */
out32(GPIO0_ISR1L, CFG_GPIO0_ISR1L);
out32(GPIO0_TSRH, CFG_GPIO0_TSRH); /* three-state select */
out32(GPIO0_TSRL, CFG_GPIO0_TSRL);
out32(GPIO0_TCR, CFG_GPIO0_TCR); /* enable output driver for outputs */
/*
* Set EMAC noise filter bits
*/
mtdcr(cpc0_epctl, CPC0_EPRCSR_E0NFE | CPC0_EPRCSR_E1NFE);
#endif /* CONFIG_405EP */
/*
* External Bus Controller (EBC) Setup
*/
#if (defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR))
/*
* Move the next instructions into icache, since these modify the flash
* we are running from!
*/
asm volatile(" bl 0f" ::: "lr");
asm volatile("0: mflr 3" ::: "r3");
asm volatile(" addi 4, 0, 14" ::: "r4");
asm volatile(" mtctr 4" ::: "ctr");
asm volatile("1: icbt 0, 3");
asm volatile(" addi 3, 3, 32" ::: "r3");
asm volatile(" bdnz 1b" ::: "ctr", "cr0");
asm volatile(" addis 3, 0, 0x0" ::: "r3");
asm volatile(" ori 3, 3, 0xA000" ::: "r3");
asm volatile(" mtctr 3" ::: "ctr");
asm volatile("2: bdnz 2b" ::: "ctr", "cr0");
mtebc(pb0ap, CFG_EBC_PB0AP);
mtebc(pb0cr, CFG_EBC_PB0CR);
#endif
#if (defined(CFG_EBC_PB1AP) && defined(CFG_EBC_PB1CR) && !(CFG_INIT_DCACHE_CS == 1))
mtebc(pb1ap, CFG_EBC_PB1AP);
mtebc(pb1cr, CFG_EBC_PB1CR);
#endif
#if (defined(CFG_EBC_PB2AP) && defined(CFG_EBC_PB2CR) && !(CFG_INIT_DCACHE_CS == 2))
mtebc(pb2ap, CFG_EBC_PB2AP);
mtebc(pb2cr, CFG_EBC_PB2CR);
#endif
#if (defined(CFG_EBC_PB3AP) && defined(CFG_EBC_PB3CR) && !(CFG_INIT_DCACHE_CS == 3))
mtebc(pb3ap, CFG_EBC_PB3AP);
mtebc(pb3cr, CFG_EBC_PB3CR);
#endif
#if (defined(CFG_EBC_PB4AP) && defined(CFG_EBC_PB4CR) && !(CFG_INIT_DCACHE_CS == 4))
mtebc(pb4ap, CFG_EBC_PB4AP);
mtebc(pb4cr, CFG_EBC_PB4CR);
#endif
#if (defined(CFG_EBC_PB5AP) && defined(CFG_EBC_PB5CR) && !(CFG_INIT_DCACHE_CS == 5))
mtebc(pb5ap, CFG_EBC_PB5AP);
mtebc(pb5cr, CFG_EBC_PB5CR);
#endif
#if (defined(CFG_EBC_PB6AP) && defined(CFG_EBC_PB6CR) && !(CFG_INIT_DCACHE_CS == 6))
mtebc(pb6ap, CFG_EBC_PB6AP);
mtebc(pb6cr, CFG_EBC_PB6CR);
#endif
#if (defined(CFG_EBC_PB7AP) && defined(CFG_EBC_PB7CR) && !(CFG_INIT_DCACHE_CS == 7))
mtebc(pb7ap, CFG_EBC_PB7AP);
mtebc(pb7cr, CFG_EBC_PB7CR);
#endif
#if defined(CONFIG_WATCHDOG)
unsigned long val;
val = mfspr(tcr);
#if defined(CONFIG_440EP) || defined(CONFIG_440GR)
val |= 0xb8000000; /* generate system reset after 1.34 seconds */
#else
val |= 0xf0000000; /* generate system reset after 2.684 seconds */
#endif
mtspr(tcr, val);
val = mfspr(tsr);
val |= 0x80000000; /* enable watchdog timer */
mtspr(tsr, val);
reset_4xx_watchdog();
#endif /* CONFIG_WATCHDOG */
}
/*
* initialize higher level parts of CPU like time base and timers
*/
int cpu_init_r (void)
{
#if defined(CONFIG_405GP) || defined(CONFIG_405EP)
bd_t *bd = gd->bd;
unsigned long reg;
#if defined(CONFIG_405GP)
uint pvr = get_pvr();
#endif
#ifdef CFG_INIT_DCACHE_CS
/*
* Flush and invalidate dcache, then disable CS for temporary stack.
* Afterwards, this CS can be used for other purposes
*/
dcache_disable(); /* flush and invalidate dcache */
mtebc(PBxAP, 0);
mtebc(PBxCR, 0); /* disable CS for temporary stack */
#if (defined(PBxAP_VAL) && defined(PBxCR_VAL))
/*
* Write new value into CS register
*/
mtebc(PBxAP, PBxAP_VAL);
mtebc(PBxCR, PBxCR_VAL);
#endif
#endif /* CFG_INIT_DCACHE_CS */
/*
* Write Ethernetaddress into on-chip register
*/
reg = 0x00000000;
reg |= bd->bi_enetaddr[0]; /* set high address */
reg = reg << 8;
reg |= bd->bi_enetaddr[1];
out32 (EMAC_IAH, reg);
reg = 0x00000000;
reg |= bd->bi_enetaddr[2]; /* set low address */
reg = reg << 8;
reg |= bd->bi_enetaddr[3];
reg = reg << 8;
reg |= bd->bi_enetaddr[4];
reg = reg << 8;
reg |= bd->bi_enetaddr[5];
out32 (EMAC_IAL, reg);
#if defined(CONFIG_405GP)
/*
* Set edge conditioning circuitry on PPC405GPr
* for compatibility to existing PPC405GP designs.
*/
if ((pvr & 0xfffffff0) == (PVR_405GPR_RB & 0xfffffff0)) {
mtdcr(ecr, 0x60606000);
}
#endif /* defined(CONFIG_405GP) */
#endif /* defined(CONFIG_405GP) || defined(CONFIG_405EP) */
return (0);
}
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