Obtain the processor speed from the kernel symbol "mips_cpu_frequency" or
"cpu_clock_freq".
E.g. With this patch:
...
MACHINE: mips64 (1800 Mhz)
...
Signed-off-by: Huacai Chen <chenhua...@loongson.cn>
Signed-off-by: Youling Tang <tangyoul...@loongson.cn>
---
mips64.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/mips64.c b/mips64.c
index 1d1297f..a0d7220 100644
--- a/mips64.c
+++ b/mips64.c
@@ -362,9 +362,29 @@ mips64_vmalloc_start(void)
return 0;
}
+/*
+ * Calculate and return the speed of the processor.
+ */
static ulong
mips64_processor_speed(void)
{
+ unsigned long cpu_hz1 = 0, cpu_hz2 = 0;
+
+ if (machdep->mhz)
+ return (machdep->mhz);
+
+ if (symbol_exists("mips_cpu_frequency")) {
+ get_symbol_data("mips_cpu_frequency", sizeof(int), &cpu_hz1);
+ if (cpu_hz1)
+ return(machdep->mhz = cpu_hz1/1000000);
+ }
+
+ if (symbol_exists("cpu_clock_freq")) {
+ get_symbol_data("cpu_clock_freq", sizeof(int), &cpu_hz2);
+ if (cpu_hz2)
+ return(machdep->mhz = cpu_hz2/1000000);
+ }
+
return 0;
}
--
2.1.0
--
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