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| author | Simon Glass <sjg@chromium.org> | 2019-09-25 08:11:35 -0600 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2019-10-08 13:57:35 +0800 |
| commit | d3abc5d1ee5ffea5647a22ddfff82c01d507f962 (patch) | |
| tree | d8d587df264e55eed155acd965fe430e37238aa6 /arch/x86/cpu/intel_common/cpu.c | |
| parent | 46dd41fa5a8f08af903c7f0cfde9abfc16d7efe3 (diff) | |
| download | u-boot-d3abc5d1ee5ffea5647a22ddfff82c01d507f962.zip u-boot-d3abc5d1ee5ffea5647a22ddfff82c01d507f962.tar.gz u-boot-d3abc5d1ee5ffea5647a22ddfff82c01d507f962.tar.bz2 | |
x86: Move common Intel CPU info code into a function
Add cpu_intel_get_info() to find out the CPU info on modern Intel CPUs.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: add parameter and return value descriptions]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch/x86/cpu/intel_common/cpu.c')
| -rw-r--r-- | arch/x86/cpu/intel_common/cpu.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/cpu/intel_common/cpu.c b/arch/x86/cpu/intel_common/cpu.c index d0ac178..9357626 100644 --- a/arch/x86/cpu/intel_common/cpu.c +++ b/arch/x86/cpu/intel_common/cpu.c @@ -4,6 +4,7 @@ */ #include <common.h> +#include <cpu.h> #include <dm.h> #include <errno.h> #include <asm/cpu_common.h> @@ -110,3 +111,15 @@ int cpu_set_flex_ratio_to_tdp_nominal(void) /* Not reached */ return -EINVAL; } + +int cpu_intel_get_info(struct cpu_info *info, int bclk) +{ + msr_t msr; + + msr = msr_read(IA32_PERF_CTL); + info->cpu_freq = ((msr.lo >> 8) & 0xff) * bclk * 1000000; + info->features = 1 << CPU_FEAT_L1_CACHE | 1 << CPU_FEAT_MMU | + 1 << CPU_FEAT_UCODE | 1 << CPU_FEAT_DEVICE_ID; + + return 0; +} |