/* * (C) Copyright 2000-2003 * 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 for the MPC8220 CPUs */ #include <common.h> #include <watchdog.h> #include <command.h> #include <mpc8220.h> #include <asm/processor.h> DECLARE_GLOBAL_DATA_PTR; int checkcpu (void) { ulong clock = gd->cpu_clk; char buf[32]; puts ("CPU: "); printf (CPU_ID_STR); printf (" (JTAG ID %08lx)", *(vu_long *) (CFG_MBAR + 0x50)); printf (" at %s MHz\n", strmhz (buf, clock)); return 0; } /* ------------------------------------------------------------------------- */ int do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) { volatile gptmr8220_t *gptmr = (volatile gptmr8220_t *) MMAP_GPTMR; ulong msr; /* Interrupts and MMU off */ __asm__ __volatile__ ("mfmsr %0":"=r" (msr):); msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR); __asm__ __volatile__ ("mtmsr %0"::"r" (msr)); /* Charge the watchdog timer */ gptmr->Prescl = 10; gptmr->Count = 1; gptmr->Mode = GPT_TMS_SGPIO; gptmr->Control = GPT_CTRL_WDEN | GPT_CTRL_CE; return 1; } /* ------------------------------------------------------------------------- */ /* * Get timebase clock frequency (like cpu_clk in Hz) * */ unsigned long get_tbclk (void) { ulong tbclk; tbclk = (gd->bus_clk + 3L) / 4L; return (tbclk); } /* ------------------------------------------------------------------------- */