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A bit of AMD specific code... untested...

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git-svn-id: https://svn.code.sf.net/p/libcpuid/code/HEAD/libcpuid@10 3b4be424-7ac5-41d7-8526-f4ddcb85d872
This commit is contained in:
Veselin Georgiev 2008-11-17 17:41:15 +00:00
parent 786a5bda7d
commit 6e2d4aa86b
1 changed files with 55 additions and 0 deletions
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55
libcpuid/recog_amd.c
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@ -58,10 +58,65 @@ static void load_amd_features(struct cpu_raw_data_t* raw, struct cpu_id_t* data)
}
}
static void decode_amd_cache_info(struct cpu_raw_data_t* raw, struct cpu_id_t* data)
{
int l3_result;
const int assoc_table[16] = {
0, 1, 2, 0, 4, 0, 8, 0, 16, 0, 32, 48, 64, 92, 128, 255
};
unsigned n = raw->ext_cpuid[0][0];
if (n >= 0x80000005) {
data->l1_data_cache = (raw->ext_cpuid[5][2] >> 24) & 0xff;
data->l1_assoc = (raw->ext_cpuid[5][2] >> 16) & 0xff;
data->l1_cacheline = (raw->ext_cpuid[5][2]) & 0xff;
data->l1_instruction_cache = (raw->ext_cpuid[5][3] >> 24) & 0xff;
}
if (n >= 0x80000006) {
data->l2_cache = (raw->ext_cpuid[6][2] >> 16) & 0xffff;
data->l2_assoc = assoc_table[(raw->ext_cpuid[6][2] >> 12) & 0xf];
data->l2_cacheline = (raw->ext_cpuid[6][2]) & 0xff;
l3_result = (raw->ext_cpuid[6][3] >> 18);
if (l3_result > 0) {
l3_result = 512 * l3_result; /* AMD spec says it's a range,
but we take the lower bound */
data->l3_cache = l3_result;
data->l3_assoc = assoc_table[(raw->ext_cpuid[6][3] >> 12) & 0xf];
data->l3_cacheline = (raw->ext_cpuid[6][3]) & 0xff;
} else {
data->l3_cache = 0;
}
}
}
static void decode_amd_number_of_cores(struct cpu_raw_data_t* raw, struct cpu_id_t* data)
{
int logical_cpus = -1, num_cores = -1;
if (raw->basic_cpuid[0][0] >= 1) {
logical_cpus = (raw->basic_cpuid[1][1] >> 16) & 0xff;
if (raw->ext_cpuid[0][0] >= 8) {
num_cores = 1 + (raw->ext_cpuid[8][2] & 0xff);
}
}
if (data->flags[CPU_FEATURE_HT]) {
if (num_cores > 1) {
data->num_cores = num_cores;
data->num_logical_cpus = logical_cpus / num_cores;
} else {
data->num_cores = 1;
data->num_logical_cpus = (logical_cpus >= 2 ? logical_cpus : 2);
}
} else {
data->num_cores = data->num_logical_cpus = 1;
}
}
int cpuid_identify_amd(struct cpu_raw_data_t* raw, struct cpu_id_t* data)
{
load_amd_features(raw, data);
decode_amd_cache_info(raw, data);
decode_amd_number_of_cores(raw, data);
return 0;
}