| wdenk | 983fda8 | 2004-10-28 00:09:35 +0000 | [diff] [blame] | 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 MPC8220 CPUs |
| 26 | */ |
| 27 | |
| 28 | #include <common.h> |
| 29 | #include <watchdog.h> |
| 30 | #include <command.h> |
| 31 | #include <mpc8220.h> |
| 32 | #include <asm/processor.h> |
| 33 | |
| 34 | int checkcpu (void) |
| 35 | { |
| 36 | DECLARE_GLOBAL_DATA_PTR; |
| 37 | |
| 38 | ulong clock = gd->cpu_clk; |
| 39 | char buf[32]; |
| 40 | |
| 41 | puts ("CPU: "); |
| 42 | |
| 43 | printf (CPU_ID_STR); |
| 44 | |
| 45 | printf (" (JTAG ID %08lx)", *(vu_long *) (CFG_MBAR + 0x50)); |
| 46 | |
| 47 | printf (" at %s MHz\n", strmhz (buf, clock)); |
| 48 | |
| 49 | return 0; |
| 50 | } |
| 51 | |
| 52 | /* ------------------------------------------------------------------------- */ |
| 53 | |
| 54 | int do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) |
| 55 | { |
| 56 | volatile gptmr8220_t *gptmr = (volatile gptmr8220_t *) MMAP_GPTMR; |
| 57 | ulong msr; |
| 58 | |
| 59 | /* Interrupts and MMU off */ |
| 60 | __asm__ __volatile__ ("mfmsr %0":"=r" (msr):); |
| 61 | |
| 62 | msr &= ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR); |
| 63 | __asm__ __volatile__ ("mtmsr %0"::"r" (msr)); |
| 64 | |
| 65 | /* Charge the watchdog timer */ |
| 66 | gptmr->Prescl = 10; |
| 67 | gptmr->Count = 1; |
| 68 | |
| 69 | gptmr->Mode = GPT_TMS_SGPIO; |
| 70 | |
| 71 | gptmr->Control = GPT_CTRL_WDEN | GPT_CTRL_CE; |
| 72 | |
| 73 | return 1; |
| 74 | } |
| 75 | |
| 76 | /* ------------------------------------------------------------------------- */ |
| 77 | |
| 78 | /* |
| 79 | * Get timebase clock frequency (like cpu_clk in Hz) |
| 80 | * |
| 81 | */ |
| 82 | unsigned long get_tbclk (void) |
| 83 | { |
| 84 | DECLARE_GLOBAL_DATA_PTR; |
| 85 | |
| 86 | ulong tbclk; |
| 87 | |
| 88 | tbclk = (gd->bus_clk + 3L) / 4L; |
| 89 | |
| 90 | return (tbclk); |
| 91 | } |
| 92 | |
| 93 | /* ------------------------------------------------------------------------- */ |