eg. because of rounding error we can get 799Mhz instead of 800Mhz.
Introduced DIV_ROUND_UP and roundup taken from linux kernel.
Signed-off-by: Dejan Minic <[EMAIL PROTECTED]>
Signed-off-by: Srikanth Srinivasan <[EMAIL PROTECTED]>
Signed-off-by: Kumar Gala <[EMAIL PROTECTED]>
---
Lets see if this version works for people. Introduced a generic
DIV_ROUND_UP taken from the kernel.
cpu/mpc85xx/cpu.c | 13 ++++++-------
include/common.h | 3 +++
2 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/cpu/mpc85xx/cpu.c b/cpu/mpc85xx/cpu.c
index dcd8817..74b210c 100644
--- a/cpu/mpc85xx/cpu.c
+++ b/cpu/mpc85xx/cpu.c
@@ -116,22 +116,21 @@ 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, ",
DIV_ROUND_UP(sysinfo.freqProcessor,1000000));
+ printf("CCB:%4lu MHz,\n", DIV_ROUND_UP(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);
+ DIV_ROUND_UP(sysinfo.freqDDRBus,2000000),
DIV_ROUND_UP(sysinfo.freqDDRBus,1000000));
break;
case 0x7:
printf(" DDR:%4lu MHz (%lu MT/s data rate) (Synchronous),
",
- sysinfo.freqDDRBus / 2000000, sysinfo.freqDDRBus / 1000000);
+ DIV_ROUND_UP(sysinfo.freqDDRBus, 2000000),
DIV_ROUND_UP(sysinfo.freqDDRBus, 1000000));
break;
default:
printf(" DDR:%4lu MHz (%lu MT/s data rate)
(Asynchronous), ",
- sysinfo.freqDDRBus / 2000000, sysinfo.freqDDRBus / 1000000);
+ DIV_ROUND_UP(sysinfo.freqDDRBus, 2000000),
DIV_ROUND_UP(sysinfo.freqDDRBus,1000000));
break;
}
@@ -154,7 +153,7 @@ int checkcpu (void)
clkdiv *= 2;
#endif
printf("LBC:%4lu MHz\n",
- sysinfo.freqSystemBus / 1000000 / clkdiv);
+ DIV_ROUND_UP(sysinfo.freqSystemBus, 1000000) / clkdiv);
} else {
printf("LBC: unknown (lcrr: 0x%08x)\n", lcrr);
}
diff --git a/include/common.h b/include/common.h
index 8630780..348a0cb 100644
--- a/include/common.h
+++ b/include/common.h
@@ -670,6 +670,9 @@ void inline show_boot_progress (int val);
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
+#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
+
/* Multicore arch functions */
#ifdef CONFIG_MP
int cpu_status(int nr);
--
1.5.4.1
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