This patch adds the PPC440GX prbdv0 divider to the memory clock equation. This is my first experience with u-boot, my thanks to Wolfgang, Travis, and everyone that has contributed. I saw my first u-boot prompt after adding this divider with the correct SDRAM settings.
Carl
--- ./u-boot-bl/cpu/ppc4xx/speed.c 2004-02-29 14:07:35.000000000 -0600 +++ ./u-boot/cpu/ppc4xx/speed.c 2004-02-29 14:13:04.000000000 -0600 @@ -247,7 +247,7 @@ void get_sys_info (sys_info_t * sysInfo) unsigned long temp1; unsigned long lfdiv; unsigned long m; - + unsigned long prbdv0;
/* Extract configured divisors */ mfsdr( sdr_sdstp0,strp0 ); @@ -263,6 +263,7 @@ void get_sys_info (sys_info_t * sysInfo) sysInfo->pllOpbDiv = temp ? temp : 4; temp = (strp1 & PLLSYS1_PERCLK_DIV_MASK) >> 24; sysInfo->pllExtBusDiv = temp ? temp : 4; + prbdv0 = (strp0 >> 2) & 0x7;
/* Calculate 'M' based on feedback source */ temp = (strp0 & PLLSYS0_SEL_MASK) >> 27; @@ -284,7 +285,7 @@ void get_sys_info (sys_info_t * sysInfo) /* Now calculate the individual clocks */ sysInfo->freqVCOMhz = (m * CONFIG_SYS_CLK_FREQ) + (m>>1); sysInfo->freqProcessor = sysInfo->freqVCOMhz/sysInfo->pllFwdDivA; - sysInfo->freqPLB = sysInfo->freqVCOMhz/sysInfo->pllFwdDivB; + sysInfo->freqPLB = sysInfo->freqVCOMhz/sysInfo->pllFwdDivB/prbdv0; sysInfo->freqOPB = sysInfo->freqPLB/sysInfo->pllOpbDiv; sysInfo->freqEPB = sysInfo->freqOPB/sysInfo->pllExtBusDiv;
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