cpu/mpc5xxx/cpu.c

   1 /*
   2  * (C) Copyright 2000-2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * CPU specific code for the MPC5xxx CPUs
  26  */
  27
  28 #include <common.h>
  29 #include <watchdog.h>
  30 #include <command.h>
  31 #include <mpc5xxx.h>
  32 #include <asm/io.h>
  33 #include <asm/processor.h>
  34
  35 #if defined(CONFIG_OF_LIBFDT)
  36 #include <libfdt.h>
  37 #include <libfdt_env.h>
  38 #include <fdt_support.h>
  39 #endif
  40
  41 DECLARE_GLOBAL_DATA_PTR;
  42
  43 int checkcpu (void)
  44 {
  45         ulong clock = gd->cpu_clk;
  46         char buf[32];
  47 #ifndef CONFIG_MGT5100
  48         uint svr, pvr;
  49 #endif
  50
  51         puts ("CPU:   ");
  52
  53 #ifdef CONFIG_MGT5100
  54         puts   (CPU_ID_STR);
  55         printf (" (JTAG ID %08lx)", *(vu_long *)MPC5XXX_CDM_JTAGID);
  56 #else
  57         svr = get_svr();
  58         pvr = get_pvr();
  59
  60         switch (pvr) {
  61         case PVR_5200:
  62                 printf("MPC5200");
  63                 break;
  64         case PVR_5200B:
  65                 printf("MPC5200B");
  66                 break;
  67         default:
  68                 printf("Unknown MPC5xxx");
  69                 break;
  70         }
  71
  72         printf (" v%d.%d, Core v%d.%d", SVR_MJREV (svr), SVR_MNREV (svr),
  73                 PVR_MAJ(pvr), PVR_MIN(pvr));
  74 #endif
  75         printf (" at %s MHz\n", strmhz (buf, clock));
  76         return 0;
  77 }
  78
  79 /* ------------------------------------------------------------------------- */
  80
  81 int
  82 do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
  83 {
  84         ulong msr;
  85         /* Interrupts and MMU off */
  86         __asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);
  87
  88         msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
  89         __asm__ __volatile__ ("mtmsr    %0"::"r" (msr));
  90
  91         /* Charge the watchdog timer */
  92         *(vu_long *)(MPC5XXX_GPT0_COUNTER) = 0x0001000f;
  93         *(vu_long *)(MPC5XXX_GPT0_ENABLE) = 0x9004; /* wden|ce|timer_ms */
  94         while(1);
  95
  96         return 1;
  97
  98 }
  99
 100 /* ------------------------------------------------------------------------- */
 101
 102 /*
 103  * Get timebase clock frequency (like cpu_clk in Hz)
 104  *
 105  */
 106 unsigned long get_tbclk (void)
 107 {
 108         ulong tbclk;
 109
 110         tbclk = (gd->bus_clk + 3L) / 4L;
 111
 112         return (tbclk);
 113 }
 114
 115 /* ------------------------------------------------------------------------- */
 116
 117 #if defined(CONFIG_OF_LIBFDT) && defined (CONFIG_OF_BOARD_SETUP)
 118 void ft_cpu_setup(void *blob, bd_t *bd)
 119 {
 120         int div = in_8((void*)CFG_MBAR + 0x204) & 0x0020 ? 8 : 4;
 121         char * cpu_path = "/cpus/" OF_CPU;
 122         char * eth_path = "/" OF_SOC "/ethernet@3000";
 123
 124         do_fixup_by_path_u32(blob, cpu_path, "timebase-frequency", OF_TBCLK, 1);
 125         do_fixup_by_path_u32(blob, cpu_path, "bus-frequency", bd->bi_busfreq, 1);
 126         do_fixup_by_path_u32(blob, cpu_path, "clock-frequency", bd->bi_intfreq, 1);
 127         do_fixup_by_path_u32(blob, "/" OF_SOC, "bus-frequency", bd->bi_ipbfreq, 1);
 128         do_fixup_by_path_u32(blob, "/" OF_SOC, "system-frequency",
 129                                 bd->bi_busfreq*div, 1);
 130         do_fixup_by_path(blob, eth_path, "mac-address", bd->bi_enetaddr, 6, 0);
 131         do_fixup_by_path(blob, eth_path, "local-mac-address", bd->bi_enetaddr, 6, 0);
 132 }
 133 #endif