diff options
Diffstat (limited to 'arch/ppc/cpu/74xx_7xx/speed.c')
| -rw-r--r-- | arch/ppc/cpu/74xx_7xx/speed.c | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/arch/ppc/cpu/74xx_7xx/speed.c b/arch/ppc/cpu/74xx_7xx/speed.c deleted file mode 100644 index f2fdcd5..0000000 --- a/arch/ppc/cpu/74xx_7xx/speed.c +++ /dev/null @@ -1,185 +0,0 @@ -/* - * (C) Copyright 2000-2002 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include <common.h> -#include <74xx_7xx.h> -#include <asm/processor.h> - -#ifdef CONFIG_AMIGAONEG3SE -#include "../board/MAI/AmigaOneG3SE/via686.h" -#endif - -DECLARE_GLOBAL_DATA_PTR; - -extern unsigned long get_board_bus_clk (void); - -static const int hid1_multipliers_x_10[] = { - 25, /* 0000 - 2.5x */ - 75, /* 0001 - 7.5x */ - 70, /* 0010 - 7x */ - 10, /* 0011 - bypass */ - 20, /* 0100 - 2x */ - 65, /* 0101 - 6.5x */ - 100, /* 0110 - 10x */ - 45, /* 0111 - 4.5x */ - 30, /* 1000 - 3x */ - 55, /* 1001 - 5.5x */ - 40, /* 1010 - 4x */ - 50, /* 1011 - 5x */ - 80, /* 1100 - 8x */ - 60, /* 1101 - 6x */ - 35, /* 1110 - 3.5x */ - 0 /* 1111 - off */ -}; - -/* PLL_CFG[0:4] table for cpu 7448/7447A/7455/7457 */ -static const int hid1_74xx_multipliers_x_10[] = { - 115, /* 00000 - 11.5x */ - 170, /* 00001 - 17x */ - 75, /* 00010 - 7.5x */ - 150, /* 00011 - 15x */ - 70, /* 00100 - 7x */ - 180, /* 00101 - 18x */ - 10, /* 00110 - bypass */ - 200, /* 00111 - 20x */ - 20, /* 01000 - 2x */ - 210, /* 01001 - 21x */ - 65, /* 01010 - 6.5x */ - 130, /* 01011 - 13x */ - 85, /* 01100 - 8.5x */ - 240, /* 01101 - 24x */ - 95, /* 01110 - 9.5x */ - 90, /* 01111 - 9x */ - 30, /* 10000 - 3x */ - 105, /* 10001 - 10.5x */ - 55, /* 10010 - 5.5x */ - 110, /* 10011 - 11x */ - 40, /* 10100 - 4x */ - 100, /* 10101 - 10x */ - 50, /* 10110 - 5x */ - 120, /* 10111 - 12x */ - 80, /* 11000 - 8x */ - 140, /* 11001 - 14x */ - 60, /* 11010 - 6x */ - 160, /* 11011 - 16x */ - 135, /* 11100 - 13.5x */ - 280, /* 11101 - 28x */ - 0, /* 11110 - off */ - 125 /* 11111 - 12.5x */ -}; - -static const int hid1_fx_multipliers_x_10[] = { - 00, /* 0000 - off */ - 00, /* 0001 - off */ - 10, /* 0010 - bypass */ - 10, /* 0011 - bypass */ - 20, /* 0100 - 2x */ - 25, /* 0101 - 2.5x */ - 30, /* 0110 - 3x */ - 35, /* 0111 - 3.5x */ - 40, /* 1000 - 4x */ - 45, /* 1001 - 4.5x */ - 50, /* 1010 - 5x */ - 55, /* 1011 - 5.5x */ - 60, /* 1100 - 6x */ - 65, /* 1101 - 6.5x */ - 70, /* 1110 - 7x */ - 75, /* 1111 - 7.5 */ - 80, /* 10000 - 8x */ - 85, /* 10001 - 8.5x */ - 90, /* 10010 - 9x */ - 95, /* 10011 - 9.5x */ - 100, /* 10100 - 10x */ - 110, /* 10101 - 11x */ - 120, /* 10110 - 12x */ -}; - - -/* ------------------------------------------------------------------------- */ - -/* - * Measure CPU clock speed (core clock GCLK1, GCLK2) - * - * (Approx. GCLK frequency in Hz) - */ - -int get_clocks (void) -{ - ulong clock = 0; - -#ifdef CONFIG_SYS_BUS_CLK - gd->bus_clk = CONFIG_SYS_BUS_CLK; /* bus clock is a fixed frequency */ -#else - gd->bus_clk = get_board_bus_clk (); /* bus clock is configurable */ -#endif - - /* calculate the clock frequency based upon the CPU type */ - switch (get_cpu_type()) { - case CPU_7447A: - case CPU_7448: - case CPU_7455: - case CPU_7457: - /* - * Make sure division is done before multiplication to prevent 32-bit - * arithmetic overflows which will cause a negative number - */ - clock = (gd->bus_clk / 10) * - hid1_74xx_multipliers_x_10[(get_hid1 () >> 12) & 0x1F]; - break; - - case CPU_750GX: - case CPU_750FX: - clock = (gd->bus_clk / 10) * - hid1_fx_multipliers_x_10[get_hid1 () >> 27]; - break; - - case CPU_7450: - case CPU_740: - case CPU_740P: - case CPU_745: - case CPU_750CX: - case CPU_750: - case CPU_750P: - case CPU_755: - case CPU_7400: - case CPU_7410: - /* - * Make sure division is done before multiplication to prevent 32-bit - * arithmetic overflows which will cause a negative number - */ - clock = (gd->bus_clk / 10) * - hid1_multipliers_x_10[get_hid1 () >> 28]; - break; - - case CPU_UNKNOWN: - printf ("get_gclk_freq(): unknown CPU type\n"); - clock = 0; - return (1); - } - - gd->cpu_clk = clock; - - return (0); -} - -/* ------------------------------------------------------------------------- */ |