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/processor.h>
  33
  34 #if defined(CONFIG_OF_FLAT_TREE)
  35 #include <ft_build.h>
  36 #endif
  37
  38 DECLARE_GLOBAL_DATA_PTR;
  39
  40 int checkcpu (void)
  41 {
  42         ulong clock = gd->cpu_clk;
  43         char buf[32];
  44 #ifndef CONFIG_MGT5100
  45         uint svr, pvr;
  46 #endif
  47
  48         puts ("CPU:   ");
  49
  50 #ifdef CONFIG_MGT5100
  51         puts   (CPU_ID_STR);
  52         printf (" (JTAG ID %08lx)", *(vu_long *)MPC5XXX_CDM_JTAGID);
  53 #else
  54         svr = get_svr();
  55         pvr = get_pvr();
  56
  57         switch (pvr) {
  58         case PVR_5200:
  59                 printf("MPC5200");
  60                 break;
  61         case PVR_5200B:
  62                 printf("MPC5200B");
  63                 break;
  64         default:
  65                 printf("Unknown MPC5xxx");
  66                 break;
  67         }
  68
  69         printf (" v%d.%d, Core v%d.%d", SVR_MJREV (svr), SVR_MNREV (svr),
  70                 PVR_MAJ(pvr), PVR_MIN(pvr));
  71 #endif
  72         printf (" at %s MHz\n", strmhz (buf, clock));
  73         return 0;
  74 }
  75
  76 /* ------------------------------------------------------------------------- */
  77
  78 int
  79 do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
  80 {
  81         ulong msr;
  82         /* Interrupts and MMU off */
  83         __asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);
  84
  85         msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
  86         __asm__ __volatile__ ("mtmsr    %0"::"r" (msr));
  87
  88         /* Charge the watchdog timer */
  89         *(vu_long *)(MPC5XXX_GPT0_COUNTER) = 0x0001000f;
  90         *(vu_long *)(MPC5XXX_GPT0_ENABLE) = 0x9004; /* wden|ce|timer_ms */
  91         while(1);
  92
  93         return 1;
  94
  95 }
  96
  97 /* ------------------------------------------------------------------------- */
  98
  99 /*
 100  * Get timebase clock frequency (like cpu_clk in Hz)
 101  *
 102  */
 103 unsigned long get_tbclk (void)
 104 {
 105         ulong tbclk;
 106
 107         tbclk = (gd->bus_clk + 3L) / 4L;
 108
 109         return (tbclk);
 110 }
 111
 112 /* ------------------------------------------------------------------------- */
 113
 114 #ifdef CONFIG_OF_FLAT_TREE
 115 void
 116 ft_cpu_setup(void *blob, bd_t *bd)
 117 {
 118         u32 *p;
 119         int len;
 120
 121         /* Core XLB bus frequency */
 122         p = ft_get_prop(blob, "/cpus/" OF_CPU "/bus-frequency", &len);
 123         if (p != NULL)
 124                 *p = cpu_to_be32(bd->bi_busfreq);
 125
 126         /* SOC peripherals use the IPB bus frequency */
 127         p = ft_get_prop(blob, "/" OF_SOC "/bus-frequency", &len);
 128         if (p != NULL)
 129                 *p = cpu_to_be32(bd->bi_ipbfreq);
 130
 131         p = ft_get_prop(blob, "/" OF_SOC "/ethernet@3000/mac-address", &len);
 132         if (p != NULL)
 133                 memcpy(p, bd->bi_enetaddr, 6);
 134
 135         p = ft_get_prop(blob, "/" OF_SOC "/ethernet@3000/local-mac-address", &len);
 136         if (p != NULL)
 137                 memcpy(p, bd->bi_enetaddr, 6);
 138 }
 139 #endif