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 <netdev.h>
  33 #include <asm/io.h>
  34 #include <asm/processor.h>
  35
  36 #if defined(CONFIG_OF_LIBFDT)
  37 #include <libfdt.h>
  38 #include <libfdt_env.h>
  39 #include <fdt_support.h>
  40 #endif
  41
  42 DECLARE_GLOBAL_DATA_PTR;
  43
  44 int checkcpu (void)
  45 {
  46         ulong clock = gd->cpu_clk;
  47         char buf[32];
  48 #ifndef CONFIG_MGT5100
  49         uint svr, pvr;
  50 #endif
  51
  52         puts ("CPU:   ");
  53
  54 #ifdef CONFIG_MGT5100
  55         puts   (CPU_ID_STR);
  56         printf (" (JTAG ID %08lx)", *(vu_long *)MPC5XXX_CDM_JTAGID);
  57 #else
  58         svr = get_svr();
  59         pvr = get_pvr();
  60
  61         switch (pvr) {
  62         case PVR_5200:
  63                 printf("MPC5200");
  64                 break;
  65         case PVR_5200B:
  66                 printf("MPC5200B");
  67                 break;
  68         default:
  69                 printf("Unknown MPC5xxx");
  70                 break;
  71         }
  72
  73         printf (" v%d.%d, Core v%d.%d", SVR_MJREV (svr), SVR_MNREV (svr),
  74                 PVR_MAJ(pvr), PVR_MIN(pvr));
  75 #endif
  76         printf (" at %s MHz\n", strmhz (buf, clock));
  77         return 0;
  78 }
  79
  80 /* ------------------------------------------------------------------------- */
  81
  82 int
  83 do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
  84 {
  85         ulong msr;
  86         /* Interrupts and MMU off */
  87         __asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);
  88
  89         msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR);
  90         __asm__ __volatile__ ("mtmsr    %0"::"r" (msr));
  91
  92         /* Charge the watchdog timer */
  93         *(vu_long *)(MPC5XXX_GPT0_COUNTER) = 0x0001000f;
  94         *(vu_long *)(MPC5XXX_GPT0_ENABLE) = 0x9004; /* wden|ce|timer_ms */
  95         while(1);
  96
  97         return 1;
  98
  99 }
 100
 101 /* ------------------------------------------------------------------------- */
 102
 103 /*
 104  * Get timebase clock frequency (like cpu_clk in Hz)
 105  *
 106  */
 107 unsigned long get_tbclk (void)
 108 {
 109         ulong tbclk;
 110
 111         tbclk = (gd->bus_clk + 3L) / 4L;
 112
 113         return (tbclk);
 114 }
 115
 116 /* ------------------------------------------------------------------------- */
 117
 118 #if defined(CONFIG_OF_LIBFDT) && defined (CONFIG_OF_BOARD_SETUP)
 119 void ft_cpu_setup(void *blob, bd_t *bd)
 120 {
 121         int div = in_8((void*)CONFIG_SYS_MBAR + 0x204) & 0x0020 ? 8 : 4;
 122         char * cpu_path = "/cpus/" OF_CPU;
 123 #ifdef CONFIG_MPC5xxx_FEC
 124         char * eth_path = "/" OF_SOC "/ethernet@3000";
 125 #endif
 126
 127         do_fixup_by_path_u32(blob, cpu_path, "timebase-frequency", OF_TBCLK, 1);
 128         do_fixup_by_path_u32(blob, cpu_path, "bus-frequency", bd->bi_busfreq, 1);
 129         do_fixup_by_path_u32(blob, cpu_path, "clock-frequency", bd->bi_intfreq, 1);
 130         do_fixup_by_path_u32(blob, "/" OF_SOC, "bus-frequency", bd->bi_ipbfreq, 1);
 131         do_fixup_by_path_u32(blob, "/" OF_SOC, "system-frequency",
 132                                 bd->bi_busfreq*div, 1);
 133 #ifdef CONFIG_MPC5xxx_FEC
 134         do_fixup_by_path(blob, eth_path, "mac-address", bd->bi_enetaddr, 6, 0);
 135         do_fixup_by_path(blob, eth_path, "local-mac-address", bd->bi_enetaddr, 6, 0);
 136 #endif
 137 }
 138 #endif
 139
 140 #ifdef CONFIG_BOOTCOUNT_LIMIT
 141
 142 void bootcount_store (ulong a)
 143 {
 144         volatile ulong *save_addr = (volatile ulong *) (MPC5XXX_CDM_BRDCRMB);
 145
 146         *save_addr = (BOOTCOUNT_MAGIC & 0xffff0000) | a;
 147 }
 148
 149 ulong bootcount_load (void)
 150 {
 151         volatile ulong *save_addr = (volatile ulong *) (MPC5XXX_CDM_BRDCRMB);
 152
 153         if ((*save_addr & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
 154                 return 0;
 155         else
 156                 return (*save_addr & 0x0000ffff);
 157 }
 158 #endif /* CONFIG_BOOTCOUNT_LIMIT */
 159
 160 #ifdef CONFIG_MPC5xxx_FEC
 161 /* Default initializations for FEC controllers.  To override,
 162  * create a board-specific function called:
 163  *      int board_eth_init(bd_t *bis)
 164  */
 165
 166 int cpu_eth_init(bd_t *bis)
 167 {
 168         return mpc5xxx_fec_initialize(bis);
 169 }
 170 #endif