/* * (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 #include #include #include 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; } } } /* * 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) { DECLARE_GLOBAL_DATA_PTR; 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) */ immr->im_siu_conf.sc_bcr = CFG_BCR; /* SIUMCR - contains debug pin configuration (4-31) */ immr->im_siu_conf.sc_siumcr = CFG_SIUMCR; 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) */ immr->im_clkrst.car_sccr = CFG_SCCR; #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 */ memctl->memc_br0 = CFG_BR0_PRELIM; 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) { DECLARE_GLOBAL_DATA_PTR; 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) { DECLARE_GLOBAL_DATA_PTR; 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); }