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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 <common.h>
#include <mpc8260.h>
#include <asm/cpm_8260.h>
#include <ioports.h>
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_BOARD_GET_CPU_CLK_F)
extern unsigned long board_get_cpu_clk_f (void);
#endif
static void config_8260_ioports (volatile immap_t * immr)
{
int portnum;
for (portnum = 0; portnum < 4; portnum++) {
uint pmsk = 0,
ppar = 0,
psor = 0,
pdir = 0,
podr = 0,
pdat = 0;
iop_conf_t *iopc = (iop_conf_t *) & iop_conf_tab[portnum][0];
iop_conf_t *eiopc = iopc + 32;
uint msk = 1;
/*
* NOTE:
* index 0 refers to pin 31,
* index 31 refers to pin 0
*/
while (iopc < eiopc) {
if (iopc->conf) {
pmsk |= msk;
if (iopc->ppar)
ppar |= msk;
if (iopc->psor)
psor |= msk;
if (iopc->pdir)
pdir |= msk;
if (iopc->podr)
podr |= msk;
if (iopc->pdat)
pdat |= msk;
}
msk <<= 1;
iopc++;
}
if (pmsk != 0) {
volatile ioport_t *iop = ioport_addr (immr, portnum);
uint tpmsk = ~pmsk;
/*
* the (somewhat confused) paragraph at the
* bottom of page 35-5 warns that there might
* be "unknown behaviour" when programming
* PSORx and PDIRx, if PPARx = 1, so I
* decided this meant I had to disable the
* dedicated function first, and enable it
* last.
*/
iop->ppar &= tpmsk;
iop->psor = (iop->psor & tpmsk) | psor;
iop->podr = (iop->podr & tpmsk) | podr;
iop->pdat = (iop->pdat & tpmsk) | pdat;
iop->pdir = (iop->pdir & tpmsk) | pdir;
iop->ppar |= ppar;
}
}
}
#define SET_VAL_MASK(a, b, mask) ((a & mask) | (b & ~mask))
/*
* Breath some life into the CPU...
*
* Set up the memory map,
* initialize a bunch of registers,
* initialize the UPM's
*/
void cpu_init_f (volatile immap_t * immr)
{
#if !defined(CONFIG_COGENT) /* done in start.S for the cogent */
uint sccr;
#endif
#if defined(CONFIG_BOARD_GET_CPU_CLK_F)
unsigned long cpu_clk;
#endif
volatile memctl8260_t *memctl = &immr->im_memctl;
extern void m8260_cpm_reset (void);
/* Pointer is writable since we allocated a register for it */
gd = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET);
/* Clear initial global data */
memset ((void *) gd, 0, sizeof (gd_t));
/* RSR - Reset Status Register - clear all status (5-4) */
gd->reset_status = immr->im_clkrst.car_rsr;
immr->im_clkrst.car_rsr = RSR_ALLBITS;
/* RMR - Reset Mode Register - contains checkstop reset enable (5-5) */
immr->im_clkrst.car_rmr = CFG_RMR;
/* BCR - Bus Configuration Register (4-25) */
#if defined(CFG_BCR_60x) && (CFG_BCR_SINGLE)
if (immr->im_siu_conf.sc_bcr & BCR_EBM) {
immr->im_siu_conf.sc_bcr = CFG_BCR_60x;
} else {
immr->im_siu_conf.sc_bcr = CFG_BCR_SINGLE;
}
#else
immr->im_siu_conf.sc_bcr = CFG_BCR;
#endif
/* SIUMCR - contains debug pin configuration (4-31) */
#if defined(CFG_SIUMCR_LOW) && (CFG_SIUMCR_HIGH)
cpu_clk = board_get_cpu_clk_f ();
if (cpu_clk >= 100000000) {
immr->im_siu_conf.sc_siumcr = CFG_SIUMCR_HIGH;
} else {
immr->im_siu_conf.sc_siumcr = CFG_SIUMCR_LOW;
}
#else
immr->im_siu_conf.sc_siumcr = CFG_SIUMCR;
#endif
config_8260_ioports (immr);
/* initialize time counter status and control register (4-40) */
immr->im_sit.sit_tmcntsc = CFG_TMCNTSC;
/* initialize the PIT (4-42) */
immr->im_sit.sit_piscr = CFG_PISCR;
#if !defined(CONFIG_COGENT) /* done in start.S for the cogent */
/* System clock control register (9-8) */
sccr = immr->im_clkrst.car_sccr &
(SCCR_PCI_MODE | SCCR_PCI_MODCK | SCCR_PCIDF_MSK);
immr->im_clkrst.car_sccr = sccr |
(CFG_SCCR & ~(SCCR_PCI_MODE | SCCR_PCI_MODCK | SCCR_PCIDF_MSK) );
#endif /* !CONFIG_COGENT */
/*
* Memory Controller:
*/
/* Map banks 0 and 1 to the FLASH banks 0 and 1 at preliminary
* addresses - these have to be modified later when FLASH size
* has been determined
*/
#if defined(CFG_OR0_REMAP)
memctl->memc_or0 = CFG_OR0_REMAP;
#endif
#if defined(CFG_OR1_REMAP)
memctl->memc_or1 = CFG_OR1_REMAP;
#endif
/* now restrict to preliminary range */
/* the PS came from the HRCW, don´t change it */
memctl->memc_br0 = SET_VAL_MASK(memctl->memc_br0 , CFG_BR0_PRELIM, BRx_PS_MSK);
memctl->memc_or0 = CFG_OR0_PRELIM;
#if defined(CFG_BR1_PRELIM) && defined(CFG_OR1_PRELIM)
memctl->memc_or1 = CFG_OR1_PRELIM;
memctl->memc_br1 = CFG_BR1_PRELIM;
#endif
#if defined(CFG_BR2_PRELIM) && defined(CFG_OR2_PRELIM)
memctl->memc_or2 = CFG_OR2_PRELIM;
memctl->memc_br2 = CFG_BR2_PRELIM;
#endif
#if defined(CFG_BR3_PRELIM) && defined(CFG_OR3_PRELIM)
memctl->memc_or3 = CFG_OR3_PRELIM;
memctl->memc_br3 = CFG_BR3_PRELIM;
#endif
#if defined(CFG_BR4_PRELIM) && defined(CFG_OR4_PRELIM)
memctl->memc_or4 = CFG_OR4_PRELIM;
memctl->memc_br4 = CFG_BR4_PRELIM;
#endif
#if defined(CFG_BR5_PRELIM) && defined(CFG_OR5_PRELIM)
memctl->memc_or5 = CFG_OR5_PRELIM;
memctl->memc_br5 = CFG_BR5_PRELIM;
#endif
#if defined(CFG_BR6_PRELIM) && defined(CFG_OR6_PRELIM)
memctl->memc_or6 = CFG_OR6_PRELIM;
memctl->memc_br6 = CFG_BR6_PRELIM;
#endif
#if defined(CFG_BR7_PRELIM) && defined(CFG_OR7_PRELIM)
memctl->memc_or7 = CFG_OR7_PRELIM;
memctl->memc_br7 = CFG_BR7_PRELIM;
#endif
#if defined(CFG_BR8_PRELIM) && defined(CFG_OR8_PRELIM)
memctl->memc_or8 = CFG_OR8_PRELIM;
memctl->memc_br8 = CFG_BR8_PRELIM;
#endif
#if defined(CFG_BR9_PRELIM) && defined(CFG_OR9_PRELIM)
memctl->memc_or9 = CFG_OR9_PRELIM;
memctl->memc_br9 = CFG_BR9_PRELIM;
#endif
#if defined(CFG_BR10_PRELIM) && defined(CFG_OR10_PRELIM)
memctl->memc_or10 = CFG_OR10_PRELIM;
memctl->memc_br10 = CFG_BR10_PRELIM;
#endif
#if defined(CFG_BR11_PRELIM) && defined(CFG_OR11_PRELIM)
memctl->memc_or11 = CFG_OR11_PRELIM;
memctl->memc_br11 = CFG_BR11_PRELIM;
#endif
m8260_cpm_reset ();
}
/*
* initialize higher level parts of CPU like time base and timers
*/
int cpu_init_r (void)
{
volatile immap_t *immr = (immap_t *) gd->bd->bi_immr_base;
immr->im_cpm.cp_rccr = CFG_RCCR;
return (0);
}
/*
* print out the reason for the reset
*/
int prt_8260_rsr (void)
{
static struct {
ulong mask;
char *desc;
} bits[] = {
{
RSR_JTRS, "JTAG"}, {
RSR_CSRS, "Check Stop"}, {
RSR_SWRS, "Software Watchdog"}, {
RSR_BMRS, "Bus Monitor"}, {
RSR_ESRS, "External Soft"}, {
RSR_EHRS, "External Hard"}
};
static int n = sizeof bits / sizeof bits[0];
ulong rsr = gd->reset_status;
int i;
char *sep;
puts (CPU_ID_STR " Reset Status:");
sep = " ";
for (i = 0; i < n; i++)
if (rsr & bits[i].mask) {
printf ("%s%s", sep, bits[i].desc);
sep = ", ";
}
puts ("\n\n");
return (0);
}
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