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Diffstat (limited to 'cpu/mpc824x/speed.c')
| -rw-r--r-- | cpu/mpc824x/speed.c | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/cpu/mpc824x/speed.c b/cpu/mpc824x/speed.c deleted file mode 100644 index fdcb972..0000000 --- a/cpu/mpc824x/speed.c +++ /dev/null @@ -1,118 +0,0 @@ -/* - * (C) Copyright 2001 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * (C) Copyright 2002 - * Gregory E. Allen, gallen@arlut.utexas.edu - * Applied Research Laboratories, The University of Texas at Austin - * - * 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 <mpc824x.h> -#include <asm/processor.h> - -DECLARE_GLOBAL_DATA_PTR; - -/* ------------------------------------------------------------------------- */ -/* NOTE: This describes the proper use of this file. - * - * CONFIG_SYS_CLK_FREQ should be defined as the input frequency on - * PCI_SYNC_IN . - * - * CONFIG_PLL_PCI_TO_MEM_MULTIPLIER is only required on MPC8240 - * boards. It should be defined as the PCI to Memory Multiplier as - * documented in the MPC8240 Hardware Specs. - * - * Other mpc824x boards don't need CONFIG_PLL_PCI_TO_MEM_MULTIPLIER - * because they can determine it from the PCR. - * - * Gary Milliorn <gary.milliorn@motorola.com> (who should know since - * he designed the Sandpoint) told us that the PCR is not in all revs - * of the MPC8240 CPU, so it's not guaranteeable and we cannot do - * away with CONFIG_PLL_PCI_TO_MEM_MULTIPLIER altogether. - */ -/* ------------------------------------------------------------------------- */ - -/* This gives the PCI to Memory multiplier times 10 */ -/* The index is the value of PLL_CFG[0:4] */ -/* This is documented in the MPC8240/5 Hardware Specs */ - -short pll_pci_to_mem_multiplier[] = { -#if defined(CONFIG_MPC8240) - 30, 30, 10, 10, 20, 10, 0, 10, - 10, 0, 20, 0, 20, 0, 20, 0, - 30, 0, 15, 0, 20, 0, 20, 0, - 25, 0, 10, 0, 15, 15, 0, 0, -#elif defined(CONFIG_MPC8245) - 30, 30, 10, 10, 20, 10, 10, 10, - 10, 20, 20, 15, 20, 15, 20, 30, - 30, 40, 15, 40, 20, 25, 20, 40, - 25, 20, 10, 20, 15, 15, 15, 0, -#else -#error Specific type of MPC824x must be defined (i.e. CONFIG_MPC8240) -#endif -}; - -#define CU824_PLL_STATE_REG 0xFE80002F -#define PCR 0x800000E2 - -/* ------------------------------------------------------------------------- */ - -/* compute the memory bus clock frequency */ -ulong get_bus_freq (ulong dummy) -{ - unsigned char pll_cfg; -#if defined(CONFIG_MPC8240) && !defined(CONFIG_CU824) - return (CONFIG_SYS_CLK_FREQ) * (CONFIG_PLL_PCI_TO_MEM_MULTIPLIER); -#elif defined(CONFIG_CU824) - pll_cfg = *(volatile unsigned char *) (CU824_PLL_STATE_REG); - pll_cfg &= 0x1f; -#else - CONFIG_READ_BYTE(PCR, pll_cfg); - pll_cfg = (pll_cfg >> 3) & 0x1f; -#endif - return ((CONFIG_SYS_CLK_FREQ) * pll_pci_to_mem_multiplier[pll_cfg] + 5) / 10; -} - - -/* ------------------------------------------------------------------------- */ - -/* This gives the Memory to CPU Core multiplier times 10 */ -/* The index is the value of PLLRATIO in HID1 */ -/* This is documented in the MPC8240 Hardware Specs */ -/* This is not documented for MPC8245 ? FIXME */ -short pllratio_to_factor[] = { - 0, 0, 0, 10, 20, 20, 25, 45, - 30, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 10, 0, 0, 0, 45, - 30, 0, 40, 0, 0, 0, 35, 0, -}; - -/* compute the CPU and memory bus clock frequencies */ -int get_clocks (void) -{ - uint hid1 = mfspr(HID1); - hid1 = (hid1 >> (32-5)) & 0x1f; - gd->cpu_clk = (pllratio_to_factor[hid1] * get_bus_freq(0) + 5) - / 10; - gd->bus_clk = get_bus_freq(0); - return (0); -} |