diff options
Diffstat (limited to 'src/soc/intel/denverton_ns/cpu.c')
| -rw-r--r-- | src/soc/intel/denverton_ns/cpu.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/src/soc/intel/denverton_ns/cpu.c b/src/soc/intel/denverton_ns/cpu.c index 44cb297c6a80..126a1c651f75 100644 --- a/src/soc/intel/denverton_ns/cpu.c +++ b/src/soc/intel/denverton_ns/cpu.c @@ -162,21 +162,20 @@ static void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize, *smm_save_state_size = sizeof(em64t100_smm_state_save_area_t); } -static int detect_num_cpus_via_cpuid(void) +static unsigned int detect_num_cpus_via_cpuid(void) { - register int ecx = 0; - struct cpuid_result leaf_b; + unsigned int ecx = 0; while (1) { - leaf_b = cpuid_ext(0xb, ecx); + const struct cpuid_result leaf_b = cpuid_ext(0xb, ecx); /* Processor doesn't have hyperthreading so just determine the - * number of cores by from level type (ecx[15:8] == * 2). */ - if ((leaf_b.ecx & 0xff00) == 0x0200) - break; + number of cores from level type (ecx[15:8] == 2). */ + if ((leaf_b.ecx >> 8 & 0xff) == 2) + return leaf_b.ebx & 0xffff; + ecx++; } - return (leaf_b.ebx & 0xffff); } static int detect_num_cpus_via_mch(void) @@ -209,11 +208,11 @@ static int detect_num_cpus_via_mch(void) /* Find CPU topology */ int get_cpu_count(void) { - int num_cpus = detect_num_cpus_via_mch(); + unsigned int num_cpus = detect_num_cpus_via_mch(); - if (num_cpus <= 0 || num_cpus > CONFIG_MAX_CPUS) { + if (num_cpus == 0 || num_cpus > CONFIG_MAX_CPUS) { num_cpus = detect_num_cpus_via_cpuid(); - printk(BIOS_DEBUG, "Number of Cores (CPUID): %d.\n", num_cpus); + printk(BIOS_DEBUG, "Number of Cores (CPUID): %u.\n", num_cpus); } return num_cpus; } |