projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 4a9cbbe8 WD |
1 | /* |
| 2 | * (C) Copyright 2000-2002 | |
| 3 | * Wolfgang Denk, DENX Software Engineering, [email protected]. | |
| 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 | #include <common.h> | |
| 25 | #include <74xx_7xx.h> | |
| 26 | #include <asm/processor.h> | |
| 27 | ||
| 28 | static const int hid1_multipliers_x_10[] = { | |
| 29 | 25, /* 0000 - 2.5x */ | |
| 30 | 75, /* 0001 - 7.5x */ | |
| 31 | 70, /* 0010 - 7x */ | |
| 32 | 10, /* 0011 - bypass */ | |
| 33 | 20, /* 0100 - 2x */ | |
| 34 | 65, /* 0101 - 6.5x */ | |
| 35 | 100, /* 0110 - 10x */ | |
| 36 | 45, /* 0111 - 4.5x */ | |
| 37 | 30, /* 1000 - 3x */ | |
| 38 | 55, /* 1001 - 5.5x */ | |
| 39 | 40, /* 1010 - 4x */ | |
| 40 | 50, /* 1011 - 5x */ | |
| 41 | 80, /* 1100 - 8x */ | |
| 42 | 60, /* 1101 - 6x */ | |
| 43 | 35, /* 1110 - 3.5x */ | |
| 44 | 0 /* 1111 - off */ | |
| 45 | }; | |
| 46 | ||
| 47 | /* ------------------------------------------------------------------------- */ | |
| 48 | ||
| 49 | /* | |
| 50 | * Measure CPU clock speed (core clock GCLK1, GCLK2) | |
| 51 | * | |
| 52 | * (Approx. GCLK frequency in Hz) | |
| 53 | */ | |
| 54 | ||
| 55 | int get_clocks (void) | |
| 56 | { | |
| 57 | DECLARE_GLOBAL_DATA_PTR; | |
| 58 | ||
| 59 | ulong clock = CFG_BUS_CLK * \ | |
| 60 | hid1_multipliers_x_10[get_hid1 () >> 28] / 10; | |
| 61 | gd->cpu_clk = clock; | |
| 62 | gd->bus_clk = CFG_BUS_CLK; | |
| 63 | ||
| 64 | return (0); | |
| 65 | } | |
| 66 | ||
| 67 | /* ------------------------------------------------------------------------- */ | |
| 68 | ||
| 69 | #if 0 /* disabled XXX - use global data instead */ | |
| 70 | ulong get_bus_freq (ulong gclk_freq) | |
| 71 | { | |
| 72 | return CFG_BUS_CLK; | |
| 73 | } | |
| 74 | #endif /* 0 */ | |
| 75 | ||
| 76 | /* ------------------------------------------------------------------------- */ |