eg. because of rounding error we can get 799Mhz instead of 800Mhz.
Signed-off-by: Dejan Minic minic@freescale.com Signed-off-by: Srikanth Srinivasan srikanth.srinivasan@freescale.com Signed-off-by: Kumar Gala galak@kernel.crashing.org --- cpu/mpc85xx/cpu.c | 18 +++++++++++------- 1 files changed, 11 insertions(+), 7 deletions(-)
diff --git a/cpu/mpc85xx/cpu.c b/cpu/mpc85xx/cpu.c index dcd8817..6972bb1 100644 --- a/cpu/mpc85xx/cpu.c +++ b/cpu/mpc85xx/cpu.c @@ -65,6 +65,11 @@ struct cpu_type cpu_type_list [] = { CPU_TYPE_ENTRY(8572_E), };
+static inline unsigned long integer_round (unsigned long val, unsigned long div) +{ + return ((val + (div/2)) / div); +} + int checkcpu (void) { sys_info_t sysinfo; @@ -116,22 +121,21 @@ int checkcpu (void) get_sys_info(&sysinfo);
puts("Clock Configuration:\n"); - printf(" CPU:%4lu MHz, ", sysinfo.freqProcessor / 1000000); - printf("CCB:%4lu MHz,\n", sysinfo.freqSystemBus / 1000000); - + printf(" CPU:%4lu MHz, ", integer_round(sysinfo.freqProcessor,1000000)); + printf("CCB:%4lu MHz,\n", integer_round(sysinfo.freqSystemBus,1000000)); ddr_ratio = ((gur->porpllsr) & 0x00003e00) >> 9; switch (ddr_ratio) { case 0x0: printf(" DDR:%4lu MHz (%lu MT/s data rate), ", - sysinfo.freqDDRBus / 2000000, sysinfo.freqDDRBus / 1000000); + integer_round(sysinfo.freqDDRBus,2000000), integer_round(sysinfo.freqDDRBus,1000000)); break; case 0x7: printf(" DDR:%4lu MHz (%lu MT/s data rate) (Synchronous), ", - sysinfo.freqDDRBus / 2000000, sysinfo.freqDDRBus / 1000000); + integer_round(sysinfo.freqDDRBus, 2000000), integer_round(sysinfo.freqDDRBus, 1000000)); break; default: printf(" DDR:%4lu MHz (%lu MT/s data rate) (Asynchronous), ", - sysinfo.freqDDRBus / 2000000, sysinfo.freqDDRBus / 1000000); + integer_round(sysinfo.freqDDRBus, 2000000), integer_round(sysinfo.freqDDRBus,1000000)); break; }
@@ -154,7 +158,7 @@ int checkcpu (void) clkdiv *= 2; #endif printf("LBC:%4lu MHz\n", - sysinfo.freqSystemBus / 1000000 / clkdiv); + integer_round(sysinfo.freqSystemBus, 1000000) / clkdiv); } else { printf("LBC: unknown (lcrr: 0x%08x)\n", lcrr); }