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https://github.com/AsahiLinux/u-boot
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20787e23b8
- update the pxa-regs.h file for PXA27x chips - add PXA27x based ADSVIX board - add support for MMC on PXA27x processors * Patch by Andrew E. Mileski, 28 Nov 2004: Fix PPC4xx SPD SDRAM detection bug * Patch by Hiroshi Ito, 26 Nov 2004: Fix logic of "test -z" and "test -n" commands
1819 lines
49 KiB
C
1819 lines
49 KiB
C
/*
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* (C) Copyright 2001
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* Bill Hunter, Wave 7 Optics, williamhunter@attbi.com
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*
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* Based on code by:
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*
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* Kenneth Johansson ,Ericsson AB.
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* kenneth.johansson@etx.ericsson.se
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*
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* hacked up by bill hunter. fixed so we could run before
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* serial_init and console_init. previous version avoided this by
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* running out of cache memory during serial/console init, then running
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* this code later.
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*
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* (C) Copyright 2002
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* Jun Gu, Artesyn Technology, jung@artesyncp.com
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* Support for IBM 440 based on OpenBIOS draminit.c from IBM.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/processor.h>
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#include <i2c.h>
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#include <ppc4xx.h>
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#ifdef CONFIG_SPD_EEPROM
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/*
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* Set default values
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*/
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#ifndef CFG_I2C_SPEED
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#define CFG_I2C_SPEED 50000
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#endif
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#ifndef CFG_I2C_SLAVE
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#define CFG_I2C_SLAVE 0xFE
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#endif
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#ifndef CONFIG_440 /* for 405 WALNUT board */
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#define SDRAM0_CFG_DCE 0x80000000
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#define SDRAM0_CFG_SRE 0x40000000
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#define SDRAM0_CFG_PME 0x20000000
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#define SDRAM0_CFG_MEMCHK 0x10000000
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#define SDRAM0_CFG_REGEN 0x08000000
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#define SDRAM0_CFG_ECCDD 0x00400000
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#define SDRAM0_CFG_EMDULR 0x00200000
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#define SDRAM0_CFG_DRW_SHIFT (31-6)
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#define SDRAM0_CFG_BRPF_SHIFT (31-8)
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#define SDRAM0_TR_CASL_SHIFT (31-8)
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#define SDRAM0_TR_PTA_SHIFT (31-13)
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#define SDRAM0_TR_CTP_SHIFT (31-15)
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#define SDRAM0_TR_LDF_SHIFT (31-17)
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#define SDRAM0_TR_RFTA_SHIFT (31-29)
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#define SDRAM0_TR_RCD_SHIFT (31-31)
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#define SDRAM0_RTR_SHIFT (31-15)
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#define SDRAM0_ECCCFG_SHIFT (31-11)
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/* SDRAM0_CFG enable macro */
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#define SDRAM0_CFG_BRPF(x) ( ( x & 0x3)<< SDRAM0_CFG_BRPF_SHIFT )
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#define SDRAM0_BXCR_SZ_MASK 0x000e0000
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#define SDRAM0_BXCR_AM_MASK 0x0000e000
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#define SDRAM0_BXCR_SZ_SHIFT (31-14)
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#define SDRAM0_BXCR_AM_SHIFT (31-18)
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#define SDRAM0_BXCR_SZ(x) ( (( x << SDRAM0_BXCR_SZ_SHIFT) & SDRAM0_BXCR_SZ_MASK) )
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#define SDRAM0_BXCR_AM(x) ( (( x << SDRAM0_BXCR_AM_SHIFT) & SDRAM0_BXCR_AM_MASK) )
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#ifdef CONFIG_SPDDRAM_SILENT
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# define SPD_ERR(x) do { return 0; } while (0)
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#else
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# define SPD_ERR(x) do { printf(x); return(0); } while (0)
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#endif
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#define sdram_HZ_to_ns(hertz) (1000000000/(hertz))
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/* function prototypes */
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int spd_read(uint addr);
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/*
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* This function is reading data from the DIMM module EEPROM over the SPD bus
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* and uses that to program the sdram controller.
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*
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* This works on boards that has the same schematics that the IBM walnut has.
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*
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* Input: null for default I2C spd functions or a pointer to a custom function
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* returning spd_data.
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*/
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long int spd_sdram(int(read_spd)(uint addr))
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{
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int bus_period,tmp,row,col;
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int total_size,bank_size,bank_code;
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int ecc_on;
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int mode;
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int bank_cnt;
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int sdram0_pmit=0x07c00000;
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#ifndef CONFIG_405EP /* not on PPC405EP */
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int sdram0_besr0=-1;
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int sdram0_besr1=-1;
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int sdram0_eccesr=-1;
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#endif
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int sdram0_ecccfg;
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int sdram0_rtr=0;
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int sdram0_tr=0;
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int sdram0_b0cr;
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int sdram0_b1cr;
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int sdram0_b2cr;
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int sdram0_b3cr;
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int sdram0_cfg=0;
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int t_rp;
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int t_rcd;
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int t_ras;
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int t_rc;
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int min_cas;
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if(read_spd == 0){
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read_spd=spd_read;
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/*
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* Make sure I2C controller is initialized
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* before continuing.
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*/
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i2c_init(CFG_I2C_SPEED, CFG_I2C_SLAVE);
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}
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/*
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* Calculate the bus period, we do it this
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* way to minimize stack utilization.
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*/
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#ifndef CONFIG_405EP
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tmp = (mfdcr(pllmd) >> (31-6)) & 0xf; /* get FBDV bits */
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tmp = CONFIG_SYS_CLK_FREQ * tmp; /* get plb freq */
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#else
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{
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unsigned long freqCPU;
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unsigned long pllmr0;
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unsigned long pllmr1;
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unsigned long pllFbkDiv;
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unsigned long pllPlbDiv;
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unsigned long pllmr0_ccdv;
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/*
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* Read PLL Mode registers
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*/
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pllmr0 = mfdcr (cpc0_pllmr0);
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pllmr1 = mfdcr (cpc0_pllmr1);
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pllFbkDiv = ((pllmr1 & PLLMR1_FBMUL_MASK) >> 20);
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if (pllFbkDiv == 0) {
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pllFbkDiv = 16;
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}
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pllPlbDiv = ((pllmr0 & PLLMR0_CPU_TO_PLB_MASK) >> 16) + 1;
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/*
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* Determine CPU clock frequency
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*/
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pllmr0_ccdv = ((pllmr0 & PLLMR0_CPU_DIV_MASK) >> 20) + 1;
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if (pllmr1 & PLLMR1_SSCS_MASK) {
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freqCPU = (CONFIG_SYS_CLK_FREQ * pllFbkDiv) / pllmr0_ccdv;
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} else {
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freqCPU = CONFIG_SYS_CLK_FREQ / pllmr0_ccdv;
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}
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/*
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* Determine PLB clock frequency
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*/
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tmp = freqCPU / pllPlbDiv;
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}
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#endif
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bus_period = sdram_HZ_to_ns(tmp); /* get sdram speed */
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/* Make shure we are using SDRAM */
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if (read_spd(2) != 0x04){
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SPD_ERR("SDRAM - non SDRAM memory module found\n");
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}
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/*------------------------------------------------------------------
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configure memory timing register
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data from DIMM:
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27 IN Row Precharge Time ( t RP)
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29 MIN RAS to CAS Delay ( t RCD)
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127 Component and Clock Detail ,clk0-clk3, junction temp, CAS
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-------------------------------------------------------------------*/
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/*
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* first figure out which cas latency mode to use
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* use the min supported mode
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*/
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tmp = read_spd(127) & 0x6;
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if(tmp == 0x02){ /* only cas = 2 supported */
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min_cas = 2;
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/* t_ck = read_spd(9); */
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/* t_ac = read_spd(10); */
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}
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else if (tmp == 0x04){ /* only cas = 3 supported */
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min_cas = 3;
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/* t_ck = read_spd(9); */
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/* t_ac = read_spd(10); */
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}
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else if (tmp == 0x06){ /* 2,3 supported, so use 2 */
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min_cas = 2;
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/* t_ck = read_spd(23); */
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/* t_ac = read_spd(24); */
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}
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else {
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SPD_ERR("SDRAM - unsupported CAS latency \n");
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}
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/* get some timing values, t_rp,t_rcd,t_ras,t_rc
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*/
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t_rp = read_spd(27);
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t_rcd = read_spd(29);
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t_ras = read_spd(30);
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t_rc = t_ras + t_rp;
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/* The following timing calcs subtract 1 before deviding.
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* this has effect of using ceiling instead of floor rounding,
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* and also subtracting 1 to convert number to reg value
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*/
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/* set up CASL */
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sdram0_tr = (min_cas - 1) << SDRAM0_TR_CASL_SHIFT;
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/* set up PTA */
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sdram0_tr |= (((t_rp - 1)/bus_period) & 0x3) << SDRAM0_TR_PTA_SHIFT;
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/* set up CTP */
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tmp = ((t_rc - t_rcd - t_rp -1) / bus_period) & 0x3;
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if(tmp<1) tmp=1;
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sdram0_tr |= tmp << SDRAM0_TR_CTP_SHIFT;
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/* set LDF = 2 cycles, reg value = 1 */
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sdram0_tr |= 1 << SDRAM0_TR_LDF_SHIFT;
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/* set RFTA = t_rfc/bus_period, use t_rfc = t_rc */
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tmp = ( (t_rc - 1) / bus_period)-3;
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if(tmp<0)tmp=0;
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if(tmp>6)tmp=6;
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sdram0_tr |= tmp << SDRAM0_TR_RFTA_SHIFT;
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/* set RCD = t_rcd/bus_period*/
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sdram0_tr |= (((t_rcd - 1) / bus_period) &0x3) << SDRAM0_TR_RCD_SHIFT ;
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/*------------------------------------------------------------------
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configure RTR register
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-------------------------------------------------------------------*/
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row = read_spd(3);
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col = read_spd(4);
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tmp = read_spd(12) & 0x7f ; /* refresh type less self refresh bit */
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switch(tmp){
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case 0x00:
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tmp=15625;
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break;
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case 0x01:
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tmp=15625/4;
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break;
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case 0x02:
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tmp=15625/2;
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break;
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case 0x03:
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tmp=15625*2;
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break;
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case 0x04:
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tmp=15625*4;
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break;
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case 0x05:
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tmp=15625*8;
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break;
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default:
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SPD_ERR("SDRAM - Bad refresh period \n");
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}
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/* convert from nsec to bus cycles */
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tmp = tmp/bus_period;
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sdram0_rtr = (tmp & 0x3ff8)<< SDRAM0_RTR_SHIFT;
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/*------------------------------------------------------------------
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determine the number of banks used
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-------------------------------------------------------------------*/
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/* byte 7:6 is module data width */
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if(read_spd(7) != 0)
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SPD_ERR("SDRAM - unsupported module width\n");
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tmp = read_spd(6);
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if (tmp < 32)
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SPD_ERR("SDRAM - unsupported module width\n");
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else if (tmp < 64)
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bank_cnt=1; /* one bank per sdram side */
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else if (tmp < 73)
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bank_cnt=2; /* need two banks per side */
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else if (tmp < 161)
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bank_cnt=4; /* need four banks per side */
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else
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SPD_ERR("SDRAM - unsupported module width\n");
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/* byte 5 is the module row count (refered to as dimm "sides") */
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tmp = read_spd(5);
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if(tmp==1);
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else if(tmp==2) bank_cnt *=2;
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else if(tmp==4) bank_cnt *=4;
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else bank_cnt = 8; /* 8 is an error code */
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if(bank_cnt > 4) /* we only have 4 banks to work with */
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SPD_ERR("SDRAM - unsupported module rows for this width\n");
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/* now check for ECC ability of module. We only support ECC
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* on 32 bit wide devices with 8 bit ECC.
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*/
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if ( (read_spd(11)==2) && (read_spd(6)==40) && (read_spd(14)==8) ){
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sdram0_ecccfg=0xf<<SDRAM0_ECCCFG_SHIFT;
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ecc_on = 1;
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}
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else{
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sdram0_ecccfg=0;
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ecc_on = 0;
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}
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/*------------------------------------------------------------------
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calculate total size
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-------------------------------------------------------------------*/
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/* calculate total size and do sanity check */
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tmp = read_spd(31);
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total_size=1<<22; /* total_size = 4MB */
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/* now multiply 4M by the smallest device row density */
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/* note that we don't support asymetric rows */
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while (((tmp & 0x0001) == 0) && (tmp != 0)){
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total_size= total_size<<1;
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tmp = tmp>>1;
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}
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total_size *= read_spd(5); /* mult by module rows (dimm sides) */
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/*------------------------------------------------------------------
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map rows * cols * banks to a mode
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-------------------------------------------------------------------*/
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switch( row )
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{
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case 11:
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switch ( col )
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{
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case 8:
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mode=4; /* mode 5 */
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break;
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case 9:
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case 10:
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mode=0; /* mode 1 */
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break;
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default:
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SPD_ERR("SDRAM - unsupported mode\n");
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}
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break;
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case 12:
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switch ( col )
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{
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case 8:
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mode=3; /* mode 4 */
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break;
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case 9:
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case 10:
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mode=1; /* mode 2 */
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break;
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default:
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SPD_ERR("SDRAM - unsupported mode\n");
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}
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break;
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case 13:
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switch ( col )
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{
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case 8:
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mode=5; /* mode 6 */
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break;
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case 9:
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case 10:
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if (read_spd(17) ==2 )
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mode=6; /* mode 7 */
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else
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mode=2; /* mode 3 */
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break;
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case 11:
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mode=2; /* mode 3 */
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break;
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default:
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SPD_ERR("SDRAM - unsupported mode\n");
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}
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break;
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default:
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SPD_ERR("SDRAM - unsupported mode\n");
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}
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/*------------------------------------------------------------------
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using the calculated values, compute the bank
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config register values.
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-------------------------------------------------------------------*/
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sdram0_b1cr = 0;
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sdram0_b2cr = 0;
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sdram0_b3cr = 0;
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/* compute the size of each bank */
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bank_size = total_size / bank_cnt;
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/* convert bank size to bank size code for ppc4xx
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by takeing log2(bank_size) - 22 */
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tmp=bank_size; /* start with tmp = bank_size */
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bank_code=0; /* and bank_code = 0 */
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while (tmp>1){ /* this takes log2 of tmp */
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bank_code++; /* and stores result in bank_code */
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tmp=tmp>>1;
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} /* bank_code is now log2(bank_size) */
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bank_code-=22; /* subtract 22 to get the code */
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tmp = SDRAM0_BXCR_SZ(bank_code) | SDRAM0_BXCR_AM(mode) | 1;
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sdram0_b0cr = (bank_size) * 0 | tmp;
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#ifndef CONFIG_405EP /* not on PPC405EP */
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if(bank_cnt>1) sdram0_b2cr = (bank_size) * 1 | tmp;
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if(bank_cnt>2) sdram0_b1cr = (bank_size) * 2 | tmp;
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if(bank_cnt>3) sdram0_b3cr = (bank_size) * 3 | tmp;
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#else
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/* PPC405EP chip only supports two SDRAM banks */
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if(bank_cnt>1) sdram0_b1cr = (bank_size) * 1 | tmp;
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if(bank_cnt>2) total_size -= (bank_size) * (bank_cnt - 2);
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#endif
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/*
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* enable sdram controller DCE=1
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* enable burst read prefetch to 32 bytes BRPF=2
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* leave other functions off
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*/
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/*------------------------------------------------------------------
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now that we've done our calculations, we are ready to
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program all the registers.
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-------------------------------------------------------------------*/
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#define mtsdram0(reg, data) mtdcr(memcfga,reg);mtdcr(memcfgd,data)
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/* disable memcontroller so updates work */
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sdram0_cfg = 0;
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mtsdram0( mem_mcopt1, sdram0_cfg );
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#ifndef CONFIG_405EP /* not on PPC405EP */
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mtsdram0( mem_besra , sdram0_besr0 );
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mtsdram0( mem_besrb , sdram0_besr1 );
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mtsdram0( mem_ecccf , sdram0_ecccfg );
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mtsdram0( mem_eccerr, sdram0_eccesr );
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#endif
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mtsdram0( mem_rtr , sdram0_rtr );
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mtsdram0( mem_pmit , sdram0_pmit );
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mtsdram0( mem_mb0cf , sdram0_b0cr );
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mtsdram0( mem_mb1cf , sdram0_b1cr );
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#ifndef CONFIG_405EP /* not on PPC405EP */
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mtsdram0( mem_mb2cf , sdram0_b2cr );
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mtsdram0( mem_mb3cf , sdram0_b3cr );
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#endif
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mtsdram0( mem_sdtr1 , sdram0_tr );
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/* SDRAM have a power on delay, 500 micro should do */
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udelay(500);
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sdram0_cfg = SDRAM0_CFG_DCE | SDRAM0_CFG_BRPF(1) | SDRAM0_CFG_ECCDD | SDRAM0_CFG_EMDULR;
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if(ecc_on) sdram0_cfg |= SDRAM0_CFG_MEMCHK;
|
|
mtsdram0( mem_mcopt1, sdram0_cfg );
|
|
|
|
|
|
/* kernel 2.4.2 from mvista has a bug with memory over 128MB */
|
|
#ifdef MVISTA_MEM_BUG
|
|
if (total_size > 128*1024*1024 )
|
|
total_size=128*1024*1024;
|
|
#endif
|
|
return (total_size);
|
|
}
|
|
|
|
int spd_read(uint addr)
|
|
{
|
|
char data[2];
|
|
|
|
if (i2c_read(SPD_EEPROM_ADDRESS, addr, 1, data, 1) == 0)
|
|
return (int)data[0];
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
#else /* CONFIG_440 */
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
| Memory Controller Options 0
|
|
+-----------------------------------------------------------------------------*/
|
|
#define SDRAM_CFG0_DCEN 0x80000000 /* SDRAM Controller Enable */
|
|
#define SDRAM_CFG0_MCHK_MASK 0x30000000 /* Memory data errchecking mask */
|
|
#define SDRAM_CFG0_MCHK_NON 0x00000000 /* No ECC generation */
|
|
#define SDRAM_CFG0_MCHK_GEN 0x20000000 /* ECC generation */
|
|
#define SDRAM_CFG0_MCHK_CHK 0x30000000 /* ECC generation and checking */
|
|
#define SDRAM_CFG0_RDEN 0x08000000 /* Registered DIMM enable */
|
|
#define SDRAM_CFG0_PMUD 0x04000000 /* Page management unit */
|
|
#define SDRAM_CFG0_DMWD_MASK 0x02000000 /* DRAM width mask */
|
|
#define SDRAM_CFG0_DMWD_32 0x00000000 /* 32 bits */
|
|
#define SDRAM_CFG0_DMWD_64 0x02000000 /* 64 bits */
|
|
#define SDRAM_CFG0_UIOS_MASK 0x00C00000 /* Unused IO State */
|
|
#define SDRAM_CFG0_PDP 0x00200000 /* Page deallocation policy */
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
| Memory Controller Options 1
|
|
+-----------------------------------------------------------------------------*/
|
|
#define SDRAM_CFG1_SRE 0x80000000 /* Self-Refresh Entry */
|
|
#define SDRAM_CFG1_PMEN 0x40000000 /* Power Management Enable */
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| SDRAM DEVPOT Options
|
|
+-----------------------------------------------------------------------------*/
|
|
#define SDRAM_DEVOPT_DLL 0x80000000
|
|
#define SDRAM_DEVOPT_DS 0x40000000
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| SDRAM MCSTS Options
|
|
+-----------------------------------------------------------------------------*/
|
|
#define SDRAM_MCSTS_MRSC 0x80000000
|
|
#define SDRAM_MCSTS_SRMS 0x40000000
|
|
#define SDRAM_MCSTS_CIS 0x20000000
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
| SDRAM Refresh Timer Register
|
|
+-----------------------------------------------------------------------------*/
|
|
#define SDRAM_RTR_RINT_MASK 0xFFFF0000
|
|
#define SDRAM_RTR_RINT_ENCODE(n) (((n) << 16) & SDRAM_RTR_RINT_MASK)
|
|
#define sdram_HZ_to_ns(hertz) (1000000000/(hertz))
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| SDRAM UABus Base Address Reg
|
|
+-----------------------------------------------------------------------------*/
|
|
#define SDRAM_UABBA_UBBA_MASK 0x0000000F
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| Memory Bank 0-7 configuration
|
|
+-----------------------------------------------------------------------------*/
|
|
#define SDRAM_BXCR_SDBA_MASK 0xff800000 /* Base address */
|
|
#define SDRAM_BXCR_SDSZ_MASK 0x000e0000 /* Size */
|
|
#define SDRAM_BXCR_SDSZ_8 0x00020000 /* 8M */
|
|
#define SDRAM_BXCR_SDSZ_16 0x00040000 /* 16M */
|
|
#define SDRAM_BXCR_SDSZ_32 0x00060000 /* 32M */
|
|
#define SDRAM_BXCR_SDSZ_64 0x00080000 /* 64M */
|
|
#define SDRAM_BXCR_SDSZ_128 0x000a0000 /* 128M */
|
|
#define SDRAM_BXCR_SDSZ_256 0x000c0000 /* 256M */
|
|
#define SDRAM_BXCR_SDSZ_512 0x000e0000 /* 512M */
|
|
#define SDRAM_BXCR_SDAM_MASK 0x0000e000 /* Addressing mode */
|
|
#define SDRAM_BXCR_SDAM_1 0x00000000 /* Mode 1 */
|
|
#define SDRAM_BXCR_SDAM_2 0x00002000 /* Mode 2 */
|
|
#define SDRAM_BXCR_SDAM_3 0x00004000 /* Mode 3 */
|
|
#define SDRAM_BXCR_SDAM_4 0x00006000 /* Mode 4 */
|
|
#define SDRAM_BXCR_SDBE 0x00000001 /* Memory Bank Enable */
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| SDRAM TR0 Options
|
|
+-----------------------------------------------------------------------------*/
|
|
#define SDRAM_TR0_SDWR_MASK 0x80000000
|
|
#define SDRAM_TR0_SDWR_2_CLK 0x00000000
|
|
#define SDRAM_TR0_SDWR_3_CLK 0x80000000
|
|
#define SDRAM_TR0_SDWD_MASK 0x40000000
|
|
#define SDRAM_TR0_SDWD_0_CLK 0x00000000
|
|
#define SDRAM_TR0_SDWD_1_CLK 0x40000000
|
|
#define SDRAM_TR0_SDCL_MASK 0x01800000
|
|
#define SDRAM_TR0_SDCL_2_0_CLK 0x00800000
|
|
#define SDRAM_TR0_SDCL_2_5_CLK 0x01000000
|
|
#define SDRAM_TR0_SDCL_3_0_CLK 0x01800000
|
|
#define SDRAM_TR0_SDPA_MASK 0x000C0000
|
|
#define SDRAM_TR0_SDPA_2_CLK 0x00040000
|
|
#define SDRAM_TR0_SDPA_3_CLK 0x00080000
|
|
#define SDRAM_TR0_SDPA_4_CLK 0x000C0000
|
|
#define SDRAM_TR0_SDCP_MASK 0x00030000
|
|
#define SDRAM_TR0_SDCP_2_CLK 0x00000000
|
|
#define SDRAM_TR0_SDCP_3_CLK 0x00010000
|
|
#define SDRAM_TR0_SDCP_4_CLK 0x00020000
|
|
#define SDRAM_TR0_SDCP_5_CLK 0x00030000
|
|
#define SDRAM_TR0_SDLD_MASK 0x0000C000
|
|
#define SDRAM_TR0_SDLD_1_CLK 0x00000000
|
|
#define SDRAM_TR0_SDLD_2_CLK 0x00004000
|
|
#define SDRAM_TR0_SDRA_MASK 0x0000001C
|
|
#define SDRAM_TR0_SDRA_6_CLK 0x00000000
|
|
#define SDRAM_TR0_SDRA_7_CLK 0x00000004
|
|
#define SDRAM_TR0_SDRA_8_CLK 0x00000008
|
|
#define SDRAM_TR0_SDRA_9_CLK 0x0000000C
|
|
#define SDRAM_TR0_SDRA_10_CLK 0x00000010
|
|
#define SDRAM_TR0_SDRA_11_CLK 0x00000014
|
|
#define SDRAM_TR0_SDRA_12_CLK 0x00000018
|
|
#define SDRAM_TR0_SDRA_13_CLK 0x0000001C
|
|
#define SDRAM_TR0_SDRD_MASK 0x00000003
|
|
#define SDRAM_TR0_SDRD_2_CLK 0x00000001
|
|
#define SDRAM_TR0_SDRD_3_CLK 0x00000002
|
|
#define SDRAM_TR0_SDRD_4_CLK 0x00000003
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| SDRAM TR1 Options
|
|
+-----------------------------------------------------------------------------*/
|
|
#define SDRAM_TR1_RDSS_MASK 0xC0000000
|
|
#define SDRAM_TR1_RDSS_TR0 0x00000000
|
|
#define SDRAM_TR1_RDSS_TR1 0x40000000
|
|
#define SDRAM_TR1_RDSS_TR2 0x80000000
|
|
#define SDRAM_TR1_RDSS_TR3 0xC0000000
|
|
#define SDRAM_TR1_RDSL_MASK 0x00C00000
|
|
#define SDRAM_TR1_RDSL_STAGE1 0x00000000
|
|
#define SDRAM_TR1_RDSL_STAGE2 0x00400000
|
|
#define SDRAM_TR1_RDSL_STAGE3 0x00800000
|
|
#define SDRAM_TR1_RDCD_MASK 0x00000800
|
|
#define SDRAM_TR1_RDCD_RCD_0_0 0x00000000
|
|
#define SDRAM_TR1_RDCD_RCD_1_2 0x00000800
|
|
#define SDRAM_TR1_RDCT_MASK 0x000001FF
|
|
#define SDRAM_TR1_RDCT_ENCODE(x) (((x) << 0) & SDRAM_TR1_RDCT_MASK)
|
|
#define SDRAM_TR1_RDCT_DECODE(x) (((x) & SDRAM_TR1_RDCT_MASK) >> 0)
|
|
#define SDRAM_TR1_RDCT_MIN 0x00000000
|
|
#define SDRAM_TR1_RDCT_MAX 0x000001FF
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| SDRAM WDDCTR Options
|
|
+-----------------------------------------------------------------------------*/
|
|
#define SDRAM_WDDCTR_WRCP_MASK 0xC0000000
|
|
#define SDRAM_WDDCTR_WRCP_0DEG 0x00000000
|
|
#define SDRAM_WDDCTR_WRCP_90DEG 0x40000000
|
|
#define SDRAM_WDDCTR_WRCP_180DEG 0x80000000
|
|
#define SDRAM_WDDCTR_DCD_MASK 0x000001FF
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| SDRAM CLKTR Options
|
|
+-----------------------------------------------------------------------------*/
|
|
#define SDRAM_CLKTR_CLKP_MASK 0xC0000000
|
|
#define SDRAM_CLKTR_CLKP_0DEG 0x00000000
|
|
#define SDRAM_CLKTR_CLKP_90DEG 0x40000000
|
|
#define SDRAM_CLKTR_CLKP_180DEG 0x80000000
|
|
#define SDRAM_CLKTR_DCDT_MASK 0x000001FF
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| SDRAM DLYCAL Options
|
|
+-----------------------------------------------------------------------------*/
|
|
#define SDRAM_DLYCAL_DLCV_MASK 0x000003FC
|
|
#define SDRAM_DLYCAL_DLCV_ENCODE(x) (((x)<<2) & SDRAM_DLYCAL_DLCV_MASK)
|
|
#define SDRAM_DLYCAL_DLCV_DECODE(x) (((x) & SDRAM_DLYCAL_DLCV_MASK)>>2)
|
|
|
|
/*-----------------------------------------------------------------------------+
|
|
| General Definition
|
|
+-----------------------------------------------------------------------------*/
|
|
#define DEFAULT_SPD_ADDR1 0x53
|
|
#define DEFAULT_SPD_ADDR2 0x52
|
|
#define ONE_BILLION 1000000000
|
|
#define MAXBANKS 4 /* at most 4 dimm banks */
|
|
#define MAX_SPD_BYTES 256
|
|
#define NUMHALFCYCLES 4
|
|
#define NUMMEMTESTS 8
|
|
#define NUMMEMWORDS 8
|
|
#define MAXBXCR 4
|
|
#define TRUE 1
|
|
#define FALSE 0
|
|
|
|
const unsigned long test[NUMMEMTESTS][NUMMEMWORDS] = {
|
|
{0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000,
|
|
0xFFFFFFFF, 0xFFFFFFFF},
|
|
{0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF,
|
|
0x00000000, 0x00000000},
|
|
{0xAAAAAAAA, 0xAAAAAAAA, 0x55555555, 0x55555555, 0xAAAAAAAA, 0xAAAAAAAA,
|
|
0x55555555, 0x55555555},
|
|
{0x55555555, 0x55555555, 0xAAAAAAAA, 0xAAAAAAAA, 0x55555555, 0x55555555,
|
|
0xAAAAAAAA, 0xAAAAAAAA},
|
|
{0xA5A5A5A5, 0xA5A5A5A5, 0x5A5A5A5A, 0x5A5A5A5A, 0xA5A5A5A5, 0xA5A5A5A5,
|
|
0x5A5A5A5A, 0x5A5A5A5A},
|
|
{0x5A5A5A5A, 0x5A5A5A5A, 0xA5A5A5A5, 0xA5A5A5A5, 0x5A5A5A5A, 0x5A5A5A5A,
|
|
0xA5A5A5A5, 0xA5A5A5A5},
|
|
{0xAA55AA55, 0xAA55AA55, 0x55AA55AA, 0x55AA55AA, 0xAA55AA55, 0xAA55AA55,
|
|
0x55AA55AA, 0x55AA55AA},
|
|
{0x55AA55AA, 0x55AA55AA, 0xAA55AA55, 0xAA55AA55, 0x55AA55AA, 0x55AA55AA,
|
|
0xAA55AA55, 0xAA55AA55}
|
|
};
|
|
|
|
|
|
unsigned char spd_read(uchar chip, uint addr);
|
|
|
|
void get_spd_info(unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks);
|
|
|
|
void check_mem_type
|
|
(unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks);
|
|
|
|
void check_volt_type
|
|
(unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks);
|
|
|
|
void program_cfg0(unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks);
|
|
|
|
void program_cfg1(unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks);
|
|
|
|
void program_rtr (unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks);
|
|
|
|
void program_tr0 (unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks);
|
|
|
|
void program_tr1 (void);
|
|
|
|
void program_ecc (unsigned long num_bytes);
|
|
|
|
unsigned
|
|
long program_bxcr(unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks);
|
|
|
|
/*
|
|
* This function is reading data from the DIMM module EEPROM over the SPD bus
|
|
* and uses that to program the sdram controller.
|
|
*
|
|
* This works on boards that has the same schematics that the IBM walnut has.
|
|
*
|
|
* BUG: Don't handle ECC memory
|
|
* BUG: A few values in the TR register is currently hardcoded
|
|
*/
|
|
|
|
long int spd_sdram(void) {
|
|
unsigned char iic0_dimm_addr[] = SPD_EEPROM_ADDRESS;
|
|
unsigned long dimm_populated[sizeof(iic0_dimm_addr)];
|
|
unsigned long total_size;
|
|
unsigned long cfg0;
|
|
unsigned long mcsts;
|
|
unsigned long num_dimm_banks; /* on board dimm banks */
|
|
|
|
num_dimm_banks = sizeof(iic0_dimm_addr);
|
|
|
|
/*
|
|
* Make sure I2C controller is initialized
|
|
* before continuing.
|
|
*/
|
|
i2c_init(CFG_I2C_SPEED, CFG_I2C_SLAVE);
|
|
|
|
/*
|
|
* Read the SPD information using I2C interface. Check to see if the
|
|
* DIMM slots are populated.
|
|
*/
|
|
get_spd_info(dimm_populated, iic0_dimm_addr, num_dimm_banks);
|
|
|
|
/*
|
|
* Check the memory type for the dimms plugged.
|
|
*/
|
|
check_mem_type(dimm_populated, iic0_dimm_addr, num_dimm_banks);
|
|
|
|
/*
|
|
* Check the voltage type for the dimms plugged.
|
|
*/
|
|
check_volt_type(dimm_populated, iic0_dimm_addr, num_dimm_banks);
|
|
|
|
#if defined(CONFIG_440_GX)
|
|
/*
|
|
* Soft-reset SDRAM controller.
|
|
*/
|
|
mtsdr(sdr_srst, SDR0_SRST_DMC);
|
|
mtsdr(sdr_srst, 0x00000000);
|
|
#endif
|
|
|
|
/*
|
|
* program 440GP SDRAM controller options (SDRAM0_CFG0)
|
|
*/
|
|
program_cfg0(dimm_populated, iic0_dimm_addr, num_dimm_banks);
|
|
|
|
/*
|
|
* program 440GP SDRAM controller options (SDRAM0_CFG1)
|
|
*/
|
|
program_cfg1(dimm_populated, iic0_dimm_addr, num_dimm_banks);
|
|
|
|
/*
|
|
* program SDRAM refresh register (SDRAM0_RTR)
|
|
*/
|
|
program_rtr(dimm_populated, iic0_dimm_addr, num_dimm_banks);
|
|
|
|
/*
|
|
* program SDRAM Timing Register 0 (SDRAM0_TR0)
|
|
*/
|
|
program_tr0(dimm_populated, iic0_dimm_addr, num_dimm_banks);
|
|
|
|
/*
|
|
* program the BxCR registers to find out total sdram installed
|
|
*/
|
|
total_size = program_bxcr(dimm_populated, iic0_dimm_addr,
|
|
num_dimm_banks);
|
|
|
|
/*
|
|
* program SDRAM Clock Timing Register (SDRAM0_CLKTR)
|
|
*/
|
|
mtsdram(mem_clktr, 0x40000000);
|
|
|
|
/*
|
|
* delay to ensure 200 usec has elapsed
|
|
*/
|
|
udelay(400);
|
|
|
|
/*
|
|
* enable the memory controller
|
|
*/
|
|
mfsdram(mem_cfg0, cfg0);
|
|
mtsdram(mem_cfg0, cfg0 | SDRAM_CFG0_DCEN);
|
|
|
|
/*
|
|
* wait for SDRAM_CFG0_DC_EN to complete
|
|
*/
|
|
while(1) {
|
|
mfsdram(mem_mcsts, mcsts);
|
|
if ((mcsts & SDRAM_MCSTS_MRSC) != 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* program SDRAM Timing Register 1, adding some delays
|
|
*/
|
|
program_tr1();
|
|
|
|
/*
|
|
* if ECC is enabled, initialize parity bits
|
|
*/
|
|
|
|
return total_size;
|
|
}
|
|
|
|
unsigned char spd_read(uchar chip, uint addr) {
|
|
unsigned char data[2];
|
|
|
|
if (i2c_read(chip, addr, 1, data, 1) == 0)
|
|
return data[0];
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
void get_spd_info(unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks)
|
|
{
|
|
unsigned long dimm_num;
|
|
unsigned long dimm_found;
|
|
unsigned char num_of_bytes;
|
|
unsigned char total_size;
|
|
|
|
dimm_found = FALSE;
|
|
for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
|
|
num_of_bytes = 0;
|
|
total_size = 0;
|
|
|
|
num_of_bytes = spd_read(iic0_dimm_addr[dimm_num], 0);
|
|
total_size = spd_read(iic0_dimm_addr[dimm_num], 1);
|
|
|
|
if ((num_of_bytes != 0) && (total_size != 0)) {
|
|
dimm_populated[dimm_num] = TRUE;
|
|
dimm_found = TRUE;
|
|
#if 0
|
|
printf("DIMM slot %lu: populated\n", dimm_num);
|
|
#endif
|
|
}
|
|
else {
|
|
dimm_populated[dimm_num] = FALSE;
|
|
#if 0
|
|
printf("DIMM slot %lu: Not populated\n", dimm_num);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
if (dimm_found == FALSE) {
|
|
printf("ERROR - No memory installed. Install a DDR-SDRAM DIMM.\n\n");
|
|
hang();
|
|
}
|
|
}
|
|
|
|
void check_mem_type(unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks)
|
|
{
|
|
unsigned long dimm_num;
|
|
unsigned char dimm_type;
|
|
|
|
for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
|
|
if (dimm_populated[dimm_num] == TRUE) {
|
|
dimm_type = spd_read(iic0_dimm_addr[dimm_num], 2);
|
|
switch (dimm_type) {
|
|
case 7:
|
|
#if 0
|
|
printf("DIMM slot %lu: DDR SDRAM detected\n", dimm_num);
|
|
#endif
|
|
break;
|
|
default:
|
|
printf("ERROR: Unsupported DIMM detected in slot %lu.\n",
|
|
dimm_num);
|
|
printf("Only DDR SDRAM DIMMs are supported.\n");
|
|
printf("Replace the DIMM module with a supported DIMM.\n\n");
|
|
hang();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void check_volt_type(unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks)
|
|
{
|
|
unsigned long dimm_num;
|
|
unsigned long voltage_type;
|
|
|
|
for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
|
|
if (dimm_populated[dimm_num] == TRUE) {
|
|
voltage_type = spd_read(iic0_dimm_addr[dimm_num], 8);
|
|
if (voltage_type != 0x04) {
|
|
printf("ERROR: DIMM %lu with unsupported voltage level.\n",
|
|
dimm_num);
|
|
hang();
|
|
}
|
|
else {
|
|
#if 0
|
|
printf("DIMM %lu voltage level supported.\n", dimm_num);
|
|
#endif
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void program_cfg0(unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks)
|
|
{
|
|
unsigned long dimm_num;
|
|
unsigned long cfg0;
|
|
unsigned long ecc_enabled;
|
|
unsigned char ecc;
|
|
unsigned char attributes;
|
|
unsigned long data_width;
|
|
unsigned long dimm_32bit;
|
|
unsigned long dimm_64bit;
|
|
|
|
/*
|
|
* get Memory Controller Options 0 data
|
|
*/
|
|
mfsdram(mem_cfg0, cfg0);
|
|
|
|
/*
|
|
* clear bits
|
|
*/
|
|
cfg0 &= ~(SDRAM_CFG0_DCEN | SDRAM_CFG0_MCHK_MASK |
|
|
SDRAM_CFG0_RDEN | SDRAM_CFG0_PMUD |
|
|
SDRAM_CFG0_DMWD_MASK |
|
|
SDRAM_CFG0_UIOS_MASK | SDRAM_CFG0_PDP);
|
|
|
|
|
|
/*
|
|
* FIXME: assume the DDR SDRAMs in both banks are the same
|
|
*/
|
|
ecc_enabled = TRUE;
|
|
for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
|
|
if (dimm_populated[dimm_num] == TRUE) {
|
|
ecc = spd_read(iic0_dimm_addr[dimm_num], 11);
|
|
if (ecc != 0x02) {
|
|
ecc_enabled = FALSE;
|
|
}
|
|
|
|
/*
|
|
* program Registered DIMM Enable
|
|
*/
|
|
attributes = spd_read(iic0_dimm_addr[dimm_num], 21);
|
|
if ((attributes & 0x02) != 0x00) {
|
|
cfg0 |= SDRAM_CFG0_RDEN;
|
|
}
|
|
|
|
/*
|
|
* program DDR SDRAM Data Width
|
|
*/
|
|
data_width =
|
|
(unsigned long)spd_read(iic0_dimm_addr[dimm_num],6) +
|
|
(((unsigned long)spd_read(iic0_dimm_addr[dimm_num],7)) << 8);
|
|
if (data_width == 64 || data_width == 72) {
|
|
dimm_64bit = TRUE;
|
|
cfg0 |= SDRAM_CFG0_DMWD_64;
|
|
}
|
|
else if (data_width == 32 || data_width == 40) {
|
|
dimm_32bit = TRUE;
|
|
cfg0 |= SDRAM_CFG0_DMWD_32;
|
|
}
|
|
else {
|
|
printf("WARNING: DIMM with datawidth of %lu bits.\n",
|
|
data_width);
|
|
printf("Only DIMMs with 32 or 64 bit datawidths supported.\n");
|
|
hang();
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* program Memory Data Error Checking
|
|
*/
|
|
if (ecc_enabled == TRUE) {
|
|
cfg0 |= SDRAM_CFG0_MCHK_GEN;
|
|
}
|
|
else {
|
|
cfg0 |= SDRAM_CFG0_MCHK_NON;
|
|
}
|
|
|
|
/*
|
|
* program Page Management Unit
|
|
*/
|
|
cfg0 |= SDRAM_CFG0_PMUD;
|
|
|
|
/*
|
|
* program Memory Controller Options 0
|
|
* Note: DCEN must be enabled after all DDR SDRAM controller
|
|
* configuration registers get initialized.
|
|
*/
|
|
mtsdram(mem_cfg0, cfg0);
|
|
}
|
|
|
|
void program_cfg1(unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks)
|
|
{
|
|
unsigned long cfg1;
|
|
mfsdram(mem_cfg1, cfg1);
|
|
|
|
/*
|
|
* Self-refresh exit, disable PM
|
|
*/
|
|
cfg1 &= ~(SDRAM_CFG1_SRE | SDRAM_CFG1_PMEN);
|
|
|
|
/*
|
|
* program Memory Controller Options 1
|
|
*/
|
|
mtsdram(mem_cfg1, cfg1);
|
|
}
|
|
|
|
void program_rtr (unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks)
|
|
{
|
|
unsigned long dimm_num;
|
|
unsigned long bus_period_x_10;
|
|
unsigned long refresh_rate = 0;
|
|
unsigned char refresh_rate_type;
|
|
unsigned long refresh_interval;
|
|
unsigned long sdram_rtr;
|
|
PPC440_SYS_INFO sys_info;
|
|
|
|
/*
|
|
* get the board info
|
|
*/
|
|
get_sys_info(&sys_info);
|
|
bus_period_x_10 = ONE_BILLION / (sys_info.freqPLB / 10);
|
|
|
|
|
|
for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
|
|
if (dimm_populated[dimm_num] == TRUE) {
|
|
refresh_rate_type = 0x7F & spd_read(iic0_dimm_addr[dimm_num], 12);
|
|
switch (refresh_rate_type) {
|
|
case 0x00:
|
|
refresh_rate = 15625;
|
|
break;
|
|
case 0x01:
|
|
refresh_rate = 15625/4;
|
|
break;
|
|
case 0x02:
|
|
refresh_rate = 15625/2;
|
|
break;
|
|
case 0x03:
|
|
refresh_rate = 15626*2;
|
|
break;
|
|
case 0x04:
|
|
refresh_rate = 15625*4;
|
|
break;
|
|
case 0x05:
|
|
refresh_rate = 15625*8;
|
|
break;
|
|
default:
|
|
printf("ERROR: DIMM %lu, unsupported refresh rate/type.\n",
|
|
dimm_num);
|
|
printf("Replace the DIMM module with a supported DIMM.\n");
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
refresh_interval = refresh_rate * 10 / bus_period_x_10;
|
|
sdram_rtr = (refresh_interval & 0x3ff8) << 16;
|
|
|
|
/*
|
|
* program Refresh Timer Register (SDRAM0_RTR)
|
|
*/
|
|
mtsdram(mem_rtr, sdram_rtr);
|
|
}
|
|
|
|
void program_tr0 (unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks)
|
|
{
|
|
unsigned long dimm_num;
|
|
unsigned long tr0;
|
|
unsigned char wcsbc;
|
|
unsigned char t_rp_ns;
|
|
unsigned char t_rcd_ns;
|
|
unsigned char t_ras_ns;
|
|
unsigned long t_rp_clk;
|
|
unsigned long t_ras_rcd_clk;
|
|
unsigned long t_rcd_clk;
|
|
unsigned long t_rfc_clk;
|
|
unsigned long plb_check;
|
|
unsigned char cas_bit;
|
|
unsigned long cas_index;
|
|
unsigned char cas_2_0_available;
|
|
unsigned char cas_2_5_available;
|
|
unsigned char cas_3_0_available;
|
|
unsigned long cycle_time_ns_x_10[3];
|
|
unsigned long tcyc_3_0_ns_x_10;
|
|
unsigned long tcyc_2_5_ns_x_10;
|
|
unsigned long tcyc_2_0_ns_x_10;
|
|
unsigned long tcyc_reg;
|
|
unsigned long bus_period_x_10;
|
|
PPC440_SYS_INFO sys_info;
|
|
unsigned long residue;
|
|
|
|
/*
|
|
* get the board info
|
|
*/
|
|
get_sys_info(&sys_info);
|
|
bus_period_x_10 = ONE_BILLION / (sys_info.freqPLB / 10);
|
|
|
|
/*
|
|
* get SDRAM Timing Register 0 (SDRAM_TR0) and clear bits
|
|
*/
|
|
mfsdram(mem_tr0, tr0);
|
|
tr0 &= ~(SDRAM_TR0_SDWR_MASK | SDRAM_TR0_SDWD_MASK |
|
|
SDRAM_TR0_SDCL_MASK | SDRAM_TR0_SDPA_MASK |
|
|
SDRAM_TR0_SDCP_MASK | SDRAM_TR0_SDLD_MASK |
|
|
SDRAM_TR0_SDRA_MASK | SDRAM_TR0_SDRD_MASK);
|
|
|
|
/*
|
|
* initialization
|
|
*/
|
|
wcsbc = 0;
|
|
t_rp_ns = 0;
|
|
t_rcd_ns = 0;
|
|
t_ras_ns = 0;
|
|
cas_2_0_available = TRUE;
|
|
cas_2_5_available = TRUE;
|
|
cas_3_0_available = TRUE;
|
|
tcyc_2_0_ns_x_10 = 0;
|
|
tcyc_2_5_ns_x_10 = 0;
|
|
tcyc_3_0_ns_x_10 = 0;
|
|
|
|
for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
|
|
if (dimm_populated[dimm_num] == TRUE) {
|
|
wcsbc = spd_read(iic0_dimm_addr[dimm_num], 15);
|
|
t_rp_ns = spd_read(iic0_dimm_addr[dimm_num], 27) >> 2;
|
|
t_rcd_ns = spd_read(iic0_dimm_addr[dimm_num], 29) >> 2;
|
|
t_ras_ns = spd_read(iic0_dimm_addr[dimm_num], 30);
|
|
cas_bit = spd_read(iic0_dimm_addr[dimm_num], 18);
|
|
|
|
for (cas_index = 0; cas_index < 3; cas_index++) {
|
|
switch (cas_index) {
|
|
case 0:
|
|
tcyc_reg = spd_read(iic0_dimm_addr[dimm_num], 9);
|
|
break;
|
|
case 1:
|
|
tcyc_reg = spd_read(iic0_dimm_addr[dimm_num], 23);
|
|
break;
|
|
default:
|
|
tcyc_reg = spd_read(iic0_dimm_addr[dimm_num], 25);
|
|
break;
|
|
}
|
|
|
|
if ((tcyc_reg & 0x0F) >= 10) {
|
|
printf("ERROR: Tcyc incorrect for DIMM in slot %lu\n",
|
|
dimm_num);
|
|
hang();
|
|
}
|
|
|
|
cycle_time_ns_x_10[cas_index] =
|
|
(((tcyc_reg & 0xF0) >> 4) * 10) + (tcyc_reg & 0x0F);
|
|
}
|
|
|
|
cas_index = 0;
|
|
|
|
if ((cas_bit & 0x80) != 0) {
|
|
cas_index += 3;
|
|
}
|
|
else if ((cas_bit & 0x40) != 0) {
|
|
cas_index += 2;
|
|
}
|
|
else if ((cas_bit & 0x20) != 0) {
|
|
cas_index += 1;
|
|
}
|
|
|
|
if (((cas_bit & 0x10) != 0) && (cas_index < 3)) {
|
|
tcyc_3_0_ns_x_10 = cycle_time_ns_x_10[cas_index];
|
|
cas_index++;
|
|
}
|
|
else {
|
|
if (cas_index != 0) {
|
|
cas_index++;
|
|
}
|
|
cas_3_0_available = FALSE;
|
|
}
|
|
|
|
if (((cas_bit & 0x08) != 0) || (cas_index < 3)) {
|
|
tcyc_2_5_ns_x_10 = cycle_time_ns_x_10[cas_index];
|
|
cas_index++;
|
|
}
|
|
else {
|
|
if (cas_index != 0) {
|
|
cas_index++;
|
|
}
|
|
cas_2_5_available = FALSE;
|
|
}
|
|
|
|
if (((cas_bit & 0x04) != 0) || (cas_index < 3)) {
|
|
tcyc_2_0_ns_x_10 = cycle_time_ns_x_10[cas_index];
|
|
cas_index++;
|
|
}
|
|
else {
|
|
if (cas_index != 0) {
|
|
cas_index++;
|
|
}
|
|
cas_2_0_available = FALSE;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Program SD_WR and SD_WCSBC fields
|
|
*/
|
|
tr0 |= SDRAM_TR0_SDWR_2_CLK; /* Write Recovery: 2 CLK */
|
|
switch (wcsbc) {
|
|
case 0:
|
|
tr0 |= SDRAM_TR0_SDWD_0_CLK;
|
|
break;
|
|
default:
|
|
tr0 |= SDRAM_TR0_SDWD_1_CLK;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Program SD_CASL field
|
|
*/
|
|
if ((cas_2_0_available == TRUE) &&
|
|
(bus_period_x_10 >= tcyc_2_0_ns_x_10)) {
|
|
tr0 |= SDRAM_TR0_SDCL_2_0_CLK;
|
|
}
|
|
else if((cas_2_5_available == TRUE) &&
|
|
(bus_period_x_10 >= tcyc_2_5_ns_x_10)) {
|
|
tr0 |= SDRAM_TR0_SDCL_2_5_CLK;
|
|
}
|
|
else if((cas_3_0_available == TRUE) &&
|
|
(bus_period_x_10 >= tcyc_3_0_ns_x_10)) {
|
|
tr0 |= SDRAM_TR0_SDCL_3_0_CLK;
|
|
}
|
|
else {
|
|
printf("ERROR: No supported CAS latency with the installed DIMMs.\n");
|
|
printf("Only CAS latencies of 2.0, 2.5, and 3.0 are supported.\n");
|
|
printf("Make sure the PLB speed is within the supported range.\n");
|
|
hang();
|
|
}
|
|
|
|
/*
|
|
* Calculate Trp in clock cycles and round up if necessary
|
|
* Program SD_PTA field
|
|
*/
|
|
t_rp_clk = sys_info.freqPLB * t_rp_ns / ONE_BILLION;
|
|
plb_check = ONE_BILLION * t_rp_clk / t_rp_ns;
|
|
if (sys_info.freqPLB != plb_check) {
|
|
t_rp_clk++;
|
|
}
|
|
switch ((unsigned long)t_rp_clk) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
tr0 |= SDRAM_TR0_SDPA_2_CLK;
|
|
break;
|
|
case 3:
|
|
tr0 |= SDRAM_TR0_SDPA_3_CLK;
|
|
break;
|
|
default:
|
|
tr0 |= SDRAM_TR0_SDPA_4_CLK;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Program SD_CTP field
|
|
*/
|
|
t_ras_rcd_clk = sys_info.freqPLB * (t_ras_ns - t_rcd_ns) / ONE_BILLION;
|
|
plb_check = ONE_BILLION * t_ras_rcd_clk / (t_ras_ns - t_rcd_ns);
|
|
if (sys_info.freqPLB != plb_check) {
|
|
t_ras_rcd_clk++;
|
|
}
|
|
switch (t_ras_rcd_clk) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
tr0 |= SDRAM_TR0_SDCP_2_CLK;
|
|
break;
|
|
case 3:
|
|
tr0 |= SDRAM_TR0_SDCP_3_CLK;
|
|
break;
|
|
case 4:
|
|
tr0 |= SDRAM_TR0_SDCP_4_CLK;
|
|
break;
|
|
default:
|
|
tr0 |= SDRAM_TR0_SDCP_5_CLK;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Program SD_LDF field
|
|
*/
|
|
tr0 |= SDRAM_TR0_SDLD_2_CLK;
|
|
|
|
/*
|
|
* Program SD_RFTA field
|
|
* FIXME tRFC hardcoded as 75 nanoseconds
|
|
*/
|
|
t_rfc_clk = sys_info.freqPLB / (ONE_BILLION / 75);
|
|
residue = sys_info.freqPLB % (ONE_BILLION / 75);
|
|
if (residue >= (ONE_BILLION / 150)) {
|
|
t_rfc_clk++;
|
|
}
|
|
switch (t_rfc_clk) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
case 3:
|
|
case 4:
|
|
case 5:
|
|
case 6:
|
|
tr0 |= SDRAM_TR0_SDRA_6_CLK;
|
|
break;
|
|
case 7:
|
|
tr0 |= SDRAM_TR0_SDRA_7_CLK;
|
|
break;
|
|
case 8:
|
|
tr0 |= SDRAM_TR0_SDRA_8_CLK;
|
|
break;
|
|
case 9:
|
|
tr0 |= SDRAM_TR0_SDRA_9_CLK;
|
|
break;
|
|
case 10:
|
|
tr0 |= SDRAM_TR0_SDRA_10_CLK;
|
|
break;
|
|
case 11:
|
|
tr0 |= SDRAM_TR0_SDRA_11_CLK;
|
|
break;
|
|
case 12:
|
|
tr0 |= SDRAM_TR0_SDRA_12_CLK;
|
|
break;
|
|
default:
|
|
tr0 |= SDRAM_TR0_SDRA_13_CLK;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Program SD_RCD field
|
|
*/
|
|
t_rcd_clk = sys_info.freqPLB * t_rcd_ns / ONE_BILLION;
|
|
plb_check = ONE_BILLION * t_rcd_clk / t_rcd_ns;
|
|
if (sys_info.freqPLB != plb_check) {
|
|
t_rcd_clk++;
|
|
}
|
|
switch (t_rcd_clk) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
tr0 |= SDRAM_TR0_SDRD_2_CLK;
|
|
break;
|
|
case 3:
|
|
tr0 |= SDRAM_TR0_SDRD_3_CLK;
|
|
break;
|
|
default:
|
|
tr0 |= SDRAM_TR0_SDRD_4_CLK;
|
|
break;
|
|
}
|
|
|
|
#if 0
|
|
printf("tr0: %x\n", tr0);
|
|
#endif
|
|
mtsdram(mem_tr0, tr0);
|
|
}
|
|
|
|
void program_tr1 (void)
|
|
{
|
|
unsigned long tr0;
|
|
unsigned long tr1;
|
|
unsigned long cfg0;
|
|
unsigned long ecc_temp;
|
|
unsigned long dlycal;
|
|
unsigned long dly_val;
|
|
unsigned long i, j, k;
|
|
unsigned long bxcr_num;
|
|
unsigned long max_pass_length;
|
|
unsigned long current_pass_length;
|
|
unsigned long current_fail_length;
|
|
unsigned long current_start;
|
|
unsigned long rdclt;
|
|
unsigned long rdclt_offset;
|
|
long max_start;
|
|
long max_end;
|
|
long rdclt_average;
|
|
unsigned char window_found;
|
|
unsigned char fail_found;
|
|
unsigned char pass_found;
|
|
unsigned long * membase;
|
|
PPC440_SYS_INFO sys_info;
|
|
|
|
/*
|
|
* get the board info
|
|
*/
|
|
get_sys_info(&sys_info);
|
|
|
|
/*
|
|
* get SDRAM Timing Register 0 (SDRAM_TR0) and clear bits
|
|
*/
|
|
mfsdram(mem_tr1, tr1);
|
|
tr1 &= ~(SDRAM_TR1_RDSS_MASK | SDRAM_TR1_RDSL_MASK |
|
|
SDRAM_TR1_RDCD_MASK | SDRAM_TR1_RDCT_MASK);
|
|
|
|
mfsdram(mem_tr0, tr0);
|
|
if (((tr0 & SDRAM_TR0_SDCL_MASK) == SDRAM_TR0_SDCL_2_5_CLK) &&
|
|
(sys_info.freqPLB > 100000000)) {
|
|
tr1 |= SDRAM_TR1_RDSS_TR2;
|
|
tr1 |= SDRAM_TR1_RDSL_STAGE3;
|
|
tr1 |= SDRAM_TR1_RDCD_RCD_1_2;
|
|
}
|
|
else {
|
|
tr1 |= SDRAM_TR1_RDSS_TR1;
|
|
tr1 |= SDRAM_TR1_RDSL_STAGE2;
|
|
tr1 |= SDRAM_TR1_RDCD_RCD_0_0;
|
|
}
|
|
|
|
/*
|
|
* save CFG0 ECC setting to a temporary variable and turn ECC off
|
|
*/
|
|
mfsdram(mem_cfg0, cfg0);
|
|
ecc_temp = cfg0 & SDRAM_CFG0_MCHK_MASK;
|
|
mtsdram(mem_cfg0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) | SDRAM_CFG0_MCHK_NON);
|
|
|
|
/*
|
|
* get the delay line calibration register value
|
|
*/
|
|
mfsdram(mem_dlycal, dlycal);
|
|
dly_val = SDRAM_DLYCAL_DLCV_DECODE(dlycal) << 2;
|
|
|
|
max_pass_length = 0;
|
|
max_start = 0;
|
|
max_end = 0;
|
|
current_pass_length = 0;
|
|
current_fail_length = 0;
|
|
current_start = 0;
|
|
rdclt_offset = 0;
|
|
window_found = FALSE;
|
|
fail_found = FALSE;
|
|
pass_found = FALSE;
|
|
#ifdef DEBUG
|
|
printf("Starting memory test ");
|
|
#endif
|
|
for (k = 0; k < NUMHALFCYCLES; k++) {
|
|
for (rdclt = 0; rdclt < dly_val; rdclt++) {
|
|
/*
|
|
* Set the timing reg for the test.
|
|
*/
|
|
mtsdram(mem_tr1, (tr1 | SDRAM_TR1_RDCT_ENCODE(rdclt)));
|
|
|
|
for (bxcr_num = 0; bxcr_num < MAXBXCR; bxcr_num++) {
|
|
mtdcr(memcfga, mem_b0cr + (bxcr_num<<2));
|
|
if ((mfdcr(memcfgd) & SDRAM_BXCR_SDBE) == SDRAM_BXCR_SDBE) {
|
|
/* Bank is enabled */
|
|
membase = (unsigned long*)
|
|
(mfdcr(memcfgd) & SDRAM_BXCR_SDBA_MASK);
|
|
|
|
/*
|
|
* Run the short memory test
|
|
*/
|
|
for (i = 0; i < NUMMEMTESTS; i++) {
|
|
for (j = 0; j < NUMMEMWORDS; j++) {
|
|
membase[j] = test[i][j];
|
|
ppcDcbf((unsigned long)&(membase[j]));
|
|
}
|
|
|
|
for (j = 0; j < NUMMEMWORDS; j++) {
|
|
if (membase[j] != test[i][j]) {
|
|
ppcDcbf((unsigned long)&(membase[j]));
|
|
break;
|
|
}
|
|
ppcDcbf((unsigned long)&(membase[j]));
|
|
}
|
|
|
|
if (j < NUMMEMWORDS) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* see if the rdclt value passed
|
|
*/
|
|
if (i < NUMMEMTESTS) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (bxcr_num == MAXBXCR) {
|
|
if (fail_found == TRUE) {
|
|
pass_found = TRUE;
|
|
if (current_pass_length == 0) {
|
|
current_start = rdclt_offset + rdclt;
|
|
}
|
|
|
|
current_fail_length = 0;
|
|
current_pass_length++;
|
|
|
|
if (current_pass_length > max_pass_length) {
|
|
max_pass_length = current_pass_length;
|
|
max_start = current_start;
|
|
max_end = rdclt_offset + rdclt;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
current_pass_length = 0;
|
|
current_fail_length++;
|
|
|
|
if (current_fail_length >= (dly_val>>2)) {
|
|
if (fail_found == FALSE) {
|
|
fail_found = TRUE;
|
|
}
|
|
else if (pass_found == TRUE) {
|
|
window_found = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
printf(".");
|
|
#endif
|
|
if (window_found == TRUE) {
|
|
break;
|
|
}
|
|
|
|
tr1 = tr1 ^ SDRAM_TR1_RDCD_MASK;
|
|
rdclt_offset += dly_val;
|
|
}
|
|
#ifdef DEBUG
|
|
printf("\n");
|
|
#endif
|
|
|
|
/*
|
|
* make sure we find the window
|
|
*/
|
|
if (window_found == FALSE) {
|
|
printf("ERROR: Cannot determine a common read delay.\n");
|
|
hang();
|
|
}
|
|
|
|
/*
|
|
* restore the orignal ECC setting
|
|
*/
|
|
mtsdram(mem_cfg0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) | ecc_temp);
|
|
|
|
/*
|
|
* set the SDRAM TR1 RDCD value
|
|
*/
|
|
tr1 &= ~SDRAM_TR1_RDCD_MASK;
|
|
if ((tr0 & SDRAM_TR0_SDCL_MASK) == SDRAM_TR0_SDCL_2_5_CLK) {
|
|
tr1 |= SDRAM_TR1_RDCD_RCD_1_2;
|
|
}
|
|
else {
|
|
tr1 |= SDRAM_TR1_RDCD_RCD_0_0;
|
|
}
|
|
|
|
/*
|
|
* set the SDRAM TR1 RDCLT value
|
|
*/
|
|
tr1 &= ~SDRAM_TR1_RDCT_MASK;
|
|
while (max_end >= (dly_val<<1)) {
|
|
max_end -= (dly_val<<1);
|
|
max_start -= (dly_val<<1);
|
|
}
|
|
|
|
rdclt_average = ((max_start + max_end) >> 1);
|
|
if (rdclt_average >= 0x60)
|
|
while(1);
|
|
|
|
if (rdclt_average < 0) {
|
|
rdclt_average = 0;
|
|
}
|
|
|
|
if (rdclt_average >= dly_val) {
|
|
rdclt_average -= dly_val;
|
|
tr1 = tr1 ^ SDRAM_TR1_RDCD_MASK;
|
|
}
|
|
tr1 |= SDRAM_TR1_RDCT_ENCODE(rdclt_average);
|
|
|
|
#if 0
|
|
printf("tr1: %x\n", tr1);
|
|
#endif
|
|
/*
|
|
* program SDRAM Timing Register 1 TR1
|
|
*/
|
|
mtsdram(mem_tr1, tr1);
|
|
}
|
|
|
|
unsigned long program_bxcr(unsigned long* dimm_populated,
|
|
unsigned char* iic0_dimm_addr,
|
|
unsigned long num_dimm_banks)
|
|
{
|
|
unsigned long dimm_num;
|
|
unsigned long bxcr_num;
|
|
unsigned long bank_base_addr;
|
|
unsigned long bank_size_bytes;
|
|
unsigned long cr;
|
|
unsigned long i;
|
|
unsigned long temp;
|
|
unsigned char num_row_addr;
|
|
unsigned char num_col_addr;
|
|
unsigned char num_banks;
|
|
unsigned char bank_size_id;
|
|
|
|
|
|
/*
|
|
* Set the BxCR regs. First, wipe out the bank config registers.
|
|
*/
|
|
for (bxcr_num = 0; bxcr_num < MAXBXCR; bxcr_num++) {
|
|
mtdcr(memcfga, mem_b0cr + (bxcr_num << 2));
|
|
mtdcr(memcfgd, 0x00000000);
|
|
}
|
|
|
|
/*
|
|
* reset the bank_base address
|
|
*/
|
|
bank_base_addr = CFG_SDRAM_BASE;
|
|
|
|
for (dimm_num = 0; dimm_num < num_dimm_banks; dimm_num++) {
|
|
if (dimm_populated[dimm_num] == TRUE) {
|
|
num_row_addr = spd_read(iic0_dimm_addr[dimm_num], 3);
|
|
num_col_addr = spd_read(iic0_dimm_addr[dimm_num], 4);
|
|
num_banks = spd_read(iic0_dimm_addr[dimm_num], 5);
|
|
bank_size_id = spd_read(iic0_dimm_addr[dimm_num], 31);
|
|
|
|
/*
|
|
* Set the SDRAM0_BxCR regs
|
|
*/
|
|
cr = 0;
|
|
bank_size_bytes = 4 * 1024 * 1024 * bank_size_id;
|
|
switch (bank_size_id) {
|
|
case 0x02:
|
|
cr |= SDRAM_BXCR_SDSZ_8;
|
|
break;
|
|
case 0x04:
|
|
cr |= SDRAM_BXCR_SDSZ_16;
|
|
break;
|
|
case 0x08:
|
|
cr |= SDRAM_BXCR_SDSZ_32;
|
|
break;
|
|
case 0x10:
|
|
cr |= SDRAM_BXCR_SDSZ_64;
|
|
break;
|
|
case 0x20:
|
|
cr |= SDRAM_BXCR_SDSZ_128;
|
|
break;
|
|
case 0x40:
|
|
cr |= SDRAM_BXCR_SDSZ_256;
|
|
break;
|
|
case 0x80:
|
|
cr |= SDRAM_BXCR_SDSZ_512;
|
|
break;
|
|
default:
|
|
printf("DDR-SDRAM: DIMM %lu BxCR configuration.\n",
|
|
dimm_num);
|
|
printf("ERROR: Unsupported value for the banksize: %d.\n",
|
|
bank_size_id);
|
|
printf("Replace the DIMM module with a supported DIMM.\n\n");
|
|
hang();
|
|
}
|
|
|
|
switch (num_col_addr) {
|
|
case 0x08:
|
|
cr |= SDRAM_BXCR_SDAM_1;
|
|
break;
|
|
case 0x09:
|
|
cr |= SDRAM_BXCR_SDAM_2;
|
|
break;
|
|
case 0x0A:
|
|
cr |= SDRAM_BXCR_SDAM_3;
|
|
break;
|
|
case 0x0B:
|
|
cr |= SDRAM_BXCR_SDAM_4;
|
|
break;
|
|
default:
|
|
printf("DDR-SDRAM: DIMM %lu BxCR configuration.\n",
|
|
dimm_num);
|
|
printf("ERROR: Unsupported value for number of "
|
|
"column addresses: %d.\n", num_col_addr);
|
|
printf("Replace the DIMM module with a supported DIMM.\n\n");
|
|
hang();
|
|
}
|
|
|
|
/*
|
|
* enable the bank
|
|
*/
|
|
cr |= SDRAM_BXCR_SDBE;
|
|
|
|
/*------------------------------------------------------------------
|
|
| This next section is hardware dependent and must be programmed
|
|
| to match the hardware.
|
|
+-----------------------------------------------------------------*/
|
|
if (dimm_num == 0) {
|
|
for (i = 0; i < num_banks; i++) {
|
|
mtdcr(memcfga, mem_b0cr + (i << 2));
|
|
temp = mfdcr(memcfgd) & ~(SDRAM_BXCR_SDBA_MASK |
|
|
SDRAM_BXCR_SDSZ_MASK |
|
|
SDRAM_BXCR_SDAM_MASK |
|
|
SDRAM_BXCR_SDBE);
|
|
cr |= temp;
|
|
cr |= bank_base_addr & SDRAM_BXCR_SDBA_MASK;
|
|
mtdcr(memcfgd, cr);
|
|
bank_base_addr += bank_size_bytes;
|
|
}
|
|
}
|
|
else {
|
|
for (i = 0; i < num_banks; i++) {
|
|
mtdcr(memcfga, mem_b2cr + (i << 2));
|
|
temp = mfdcr(memcfgd) & ~(SDRAM_BXCR_SDBA_MASK |
|
|
SDRAM_BXCR_SDSZ_MASK |
|
|
SDRAM_BXCR_SDAM_MASK |
|
|
SDRAM_BXCR_SDBE);
|
|
cr |= temp;
|
|
cr |= bank_base_addr & SDRAM_BXCR_SDBA_MASK;
|
|
mtdcr(memcfgd, cr);
|
|
bank_base_addr += bank_size_bytes;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return(bank_base_addr);
|
|
}
|
|
|
|
void program_ecc (unsigned long num_bytes)
|
|
{
|
|
unsigned long bank_base_addr;
|
|
unsigned long current_address;
|
|
unsigned long end_address;
|
|
unsigned long address_increment;
|
|
unsigned long cfg0;
|
|
|
|
/*
|
|
* get Memory Controller Options 0 data
|
|
*/
|
|
mfsdram(mem_cfg0, cfg0);
|
|
|
|
/*
|
|
* reset the bank_base address
|
|
*/
|
|
bank_base_addr = CFG_SDRAM_BASE;
|
|
|
|
if ((cfg0 & SDRAM_CFG0_MCHK_MASK) != SDRAM_CFG0_MCHK_NON) {
|
|
mtsdram(mem_cfg0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) |
|
|
SDRAM_CFG0_MCHK_GEN);
|
|
|
|
if ((cfg0 & SDRAM_CFG0_DMWD_MASK) == SDRAM_CFG0_DMWD_32) {
|
|
address_increment = 4;
|
|
}
|
|
else {
|
|
address_increment = 8;
|
|
}
|
|
|
|
current_address = (unsigned long)(bank_base_addr);
|
|
end_address = (unsigned long)(bank_base_addr) + num_bytes;
|
|
|
|
while (current_address < end_address) {
|
|
*((unsigned long*)current_address) = 0x00000000;
|
|
current_address += address_increment;
|
|
}
|
|
|
|
mtsdram(mem_cfg0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) |
|
|
SDRAM_CFG0_MCHK_CHK);
|
|
}
|
|
}
|
|
|
|
#endif /* CONFIG_440 */
|
|
|
|
#endif /* CONFIG_SPD_EEPROM */
|