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x86: Add cache information support for Hygon processors

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Add hygon branch in dl_init_cacheinfo function to initialize
cache size variables for hygon processors. In the meanwhile,
add handle_hygon() function to get cache information.

Signed-off-by: Feifei Wang <wangfeifei@hygon.cn>
Reviewed-by: Jing Li <lijing@hygon.cn>
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
This commit is contained in:
Feifei Wang 2024-08-19 14:57:54 +08:00 committed by H.J. Lu
parent 6b08116b2d
commit d14aecbffc
1 changed files with 60 additions and 0 deletions
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60
sysdeps/x86/dl-cacheinfo.h
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@ -567,6 +567,48 @@ handle_zhaoxin (int name)
return 0;
}
static long int __attribute__ ((noinline))
handle_hygon (int name)
{
unsigned int eax;
unsigned int ebx;
unsigned int ecx;
unsigned int edx;
unsigned int count = 0x1;
if (name >= _SC_LEVEL3_CACHE_SIZE)
count = 0x3;
else if (name >= _SC_LEVEL2_CACHE_SIZE)
count = 0x2;
else if (name >= _SC_LEVEL1_DCACHE_SIZE)
count = 0x0;
/* Use __cpuid__ '0x8000_001D' to compute cache details. */
__cpuid_count (0x8000001D, count, eax, ebx, ecx, edx);
switch (name)
{
case _SC_LEVEL1_ICACHE_ASSOC:
case _SC_LEVEL1_DCACHE_ASSOC:
case _SC_LEVEL2_CACHE_ASSOC:
case _SC_LEVEL3_CACHE_ASSOC:
return ((ebx >> 22) & 0x3ff) + 1;
case _SC_LEVEL1_ICACHE_LINESIZE:
case _SC_LEVEL1_DCACHE_LINESIZE:
case _SC_LEVEL2_CACHE_LINESIZE:
case _SC_LEVEL3_CACHE_LINESIZE:
return (ebx & 0xfff) + 1;
case _SC_LEVEL1_ICACHE_SIZE:
case _SC_LEVEL1_DCACHE_SIZE:
case _SC_LEVEL2_CACHE_SIZE:
case _SC_LEVEL3_CACHE_SIZE:
return (((ebx >> 22) & 0x3ff) + 1) * ((ebx & 0xfff) + 1) * (ecx + 1);
default:
__builtin_unreachable ();
}
return -1;
}
static void
get_common_cache_info (long int *shared_ptr, long int * shared_per_thread_ptr, unsigned int *threads_ptr,
long int core)
@ -889,6 +931,24 @@ dl_init_cacheinfo (struct cpu_features *cpu_features)
shared_per_thread = shared;
}
else if (cpu_features->basic.kind == arch_kind_hygon)
{
data = handle_hygon (_SC_LEVEL1_DCACHE_SIZE);
shared = handle_hygon (_SC_LEVEL3_CACHE_SIZE);
shared_per_thread = shared;
level1_icache_size = handle_hygon (_SC_LEVEL1_ICACHE_SIZE);
level1_icache_linesize = handle_hygon (_SC_LEVEL1_ICACHE_LINESIZE);
level1_dcache_size = data;
level1_dcache_assoc = handle_hygon (_SC_LEVEL1_DCACHE_ASSOC);
level1_dcache_linesize = handle_hygon (_SC_LEVEL1_DCACHE_LINESIZE);
level2_cache_size = handle_hygon (_SC_LEVEL2_CACHE_SIZE);;
level2_cache_assoc = handle_hygon (_SC_LEVEL2_CACHE_ASSOC);
level2_cache_linesize = handle_hygon (_SC_LEVEL2_CACHE_LINESIZE);
level3_cache_size = shared;
level3_cache_assoc = handle_hygon (_SC_LEVEL3_CACHE_ASSOC);
level3_cache_linesize = handle_hygon (_SC_LEVEL3_CACHE_LINESIZE);
}
cpu_features->level1_icache_size = level1_icache_size;
cpu_features->level1_icache_linesize = level1_icache_linesize;