2024-02-22 02:13:30 +00:00
|
|
|
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
|
|
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
|
|
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
|
|
│ Copyright 2024 Justine Alexandra Roberts Tunney │
|
|
|
|
│ │
|
|
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
|
|
│ │
|
|
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
|
|
#include "libc/calls/calls.h"
|
|
|
|
#include "libc/calls/struct/cpuset.h"
|
|
|
|
#include "libc/calls/syscall_support-nt.internal.h"
|
|
|
|
#include "libc/dce.h"
|
|
|
|
#include "libc/errno.h"
|
|
|
|
#include "libc/nexgen32e/rdtscp.h"
|
|
|
|
#include "libc/nexgen32e/x86feature.h"
|
|
|
|
#include "libc/nt/struct/processornumber.h"
|
|
|
|
#include "libc/nt/synchronization.h"
|
|
|
|
#include "libc/runtime/syslib.internal.h"
|
|
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
|
|
|
|
int sys_getcpu(unsigned *opt_cpu, unsigned *opt_node, void *tcache);
|
|
|
|
|
|
|
|
int getcpu(unsigned *out_opt_cpu, unsigned *out_opt_node) {
|
|
|
|
unsigned cpu;
|
|
|
|
unsigned node;
|
|
|
|
if (X86_HAVE(RDTSCP)) {
|
|
|
|
unsigned tsc_aux;
|
|
|
|
rdtscp(&tsc_aux);
|
|
|
|
cpu = TSC_AUX_CORE(tsc_aux);
|
|
|
|
node = TSC_AUX_NODE(tsc_aux);
|
|
|
|
} else if (IsWindows()) {
|
|
|
|
struct NtProcessorNumber pn;
|
|
|
|
GetCurrentProcessorNumberEx(&pn);
|
|
|
|
cpu = 64 * pn.Group + pn.Number;
|
|
|
|
unsigned short node16;
|
|
|
|
if (GetNumaProcessorNodeEx(&pn, &node16)) {
|
|
|
|
node = node16;
|
|
|
|
} else {
|
|
|
|
return __winerr();
|
|
|
|
}
|
2024-06-05 08:31:21 +00:00
|
|
|
} else if (IsAarch64()) {
|
|
|
|
long tpidr_el0;
|
|
|
|
asm("mrs\t%0,tpidr_el0" : "=r"(tpidr_el0));
|
|
|
|
cpu = tpidr_el0 & 255;
|
|
|
|
node = 0;
|
2024-02-22 02:13:30 +00:00
|
|
|
} else {
|
|
|
|
int rc = sys_getcpu(&cpu, &node, 0);
|
|
|
|
if (rc == -1)
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
if (out_opt_cpu) {
|
|
|
|
*out_opt_cpu = cpu;
|
|
|
|
}
|
|
|
|
if (out_opt_node) {
|
|
|
|
*out_opt_node = node;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|