diff options
Diffstat (limited to 'cpu/mpc85xx')
| -rw-r--r-- | cpu/mpc85xx/cpu.c | 16 | ||||
| -rw-r--r-- | cpu/mpc85xx/spd_sdram.c | 6 | ||||
| -rw-r--r-- | cpu/mpc85xx/speed.c | 25 |
3 files changed, 43 insertions, 4 deletions
diff --git a/cpu/mpc85xx/cpu.c b/cpu/mpc85xx/cpu.c index e55d337..ac8b018 100644 --- a/cpu/mpc85xx/cpu.c +++ b/cpu/mpc85xx/cpu.c @@ -39,6 +39,8 @@ int checkcpu (void) uint fam; uint ver; uint major, minor; + u32 ddr_ratio; + volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR); svr = get_svr(); ver = SVR_VER(svr); @@ -102,7 +104,19 @@ int checkcpu (void) puts("Clock Configuration:\n"); printf(" CPU:%4lu MHz, ", sysinfo.freqProcessor / 1000000); printf("CCB:%4lu MHz,\n", sysinfo.freqSystemBus / 1000000); - printf(" DDR:%4lu MHz, ", sysinfo.freqSystemBus / 2000000); + + ddr_ratio = ((gur->porpllsr) & 0x00003e00) >> 9; + switch (ddr_ratio) { + case 0x0: + printf(" DDR:%4lu MHz, ", sysinfo.freqDDRBus / 2000000); + break; + case 0x7: + printf(" DDR:%4lu MHz (Synchronous), ", sysinfo.freqDDRBus / 2000000); + break; + default: + printf(" DDR:%4lu MHz (Asynchronous), ", sysinfo.freqDDRBus / 2000000); + break; + } #if defined(CFG_LBC_LCRR) lcrr = CFG_LBC_LCRR; diff --git a/cpu/mpc85xx/spd_sdram.c b/cpu/mpc85xx/spd_sdram.c index 2a4cd57..553f736 100644 --- a/cpu/mpc85xx/spd_sdram.c +++ b/cpu/mpc85xx/spd_sdram.c @@ -53,8 +53,8 @@ picos_to_clk(int picos) { int clks; - clks = picos / (2000000000 / (get_bus_freq(0) / 1000)); - if (picos % (2000000000 / (get_bus_freq(0) / 1000)) != 0) { + clks = picos / (2000000000 / (get_ddr_freq(0) / 1000)); + if (picos % (2000000000 / (get_ddr_freq(0) / 1000)) != 0) { clks++; } @@ -421,7 +421,7 @@ spd_sdram(void) * Adjust the CAS Latency to allow for bus speeds that * are slower than the DDR module. */ - busfreq = get_bus_freq(0) / 1000000; /* MHz */ + busfreq = get_ddr_freq(0) / 1000000; /* MHz */ effective_data_rate = max_data_rate; if (busfreq < 90) { diff --git a/cpu/mpc85xx/speed.c b/cpu/mpc85xx/speed.c index 293269c..27de37a 100644 --- a/cpu/mpc85xx/speed.c +++ b/cpu/mpc85xx/speed.c @@ -48,6 +48,15 @@ void get_sys_info (sys_info_t * sysInfo) * overflow for processor speeds above 2GHz */ half_freqSystemBus = sysInfo->freqSystemBus/2; sysInfo->freqProcessor = e500_ratio*half_freqSystemBus; + sysInfo->freqDDRBus = sysInfo->freqSystemBus; + +#ifdef CONFIG_DDR_CLK_FREQ + { + u32 ddr_ratio = ((gur->porpllsr) & 0x00003e00) >> 9; + if (ddr_ratio != 0x7) + sysInfo->freqDDRBus = ddr_ratio * CONFIG_DDR_CLK_FREQ; + } +#endif } @@ -93,3 +102,19 @@ ulong get_bus_freq (ulong dummy) return val; } + +/******************************************** + * get_ddr_freq + * return ddr bus freq in Hz + *********************************************/ +ulong get_ddr_freq (ulong dummy) +{ + ulong val; + + sys_info_t sys_info; + + get_sys_info (&sys_info); + val = sys_info.freqDDRBus; + + return val; +} |