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/*
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* Machine-dependent definitions for cpu identification.
*
*/
#ifndef _I386_CPU_NUMBER_H_
#define _I386_CPU_NUMBER_H_
#if NCPUS > 1
#define MY(stm) %gs:PERCPU_##stm
#ifdef __i386__
#define CX(addr, reg) addr(,reg,4)
#endif
#ifdef __x86_64__
#define CX(addr, reg) addr(,reg,8)
#endif
#define CPU_NUMBER_NO_STACK(reg) \
movl %cs:lapic, reg ;\
movl %cs:APIC_ID(reg), reg ;\
shrl $24, reg ;\
movl %cs:CX(cpu_id_lut, reg), reg ;\
#ifdef __i386__
/* Never call CPU_NUMBER_NO_GS(%esi) */
#define CPU_NUMBER_NO_GS(reg) \
pushl %esi ;\
pushl %eax ;\
pushl %ebx ;\
pushl %ecx ;\
pushl %edx ;\
movl $1, %eax ;\
cpuid ;\
shrl $24, %ebx ;\
movl %cs:CX(cpu_id_lut, %ebx), %esi ;\
popl %edx ;\
popl %ecx ;\
popl %ebx ;\
popl %eax ;\
movl %esi, reg ;\
popl %esi
#endif
#ifdef __x86_64__
/* Never call CPU_NUMBER_NO_GS(%esi) */
#define CPU_NUMBER_NO_GS(reg) \
pushq %rsi ;\
pushq %rax ;\
pushq %rbx ;\
pushq %rcx ;\
pushq %rdx ;\
movl $1, %eax ;\
cpuid ;\
shrl $24, %ebx ;\
movl %cs:CX(cpu_id_lut, %ebx), %esi ;\
popq %rdx ;\
popq %rcx ;\
popq %rbx ;\
popq %rax ;\
movl %esi, reg ;\
popq %rsi
#endif
#define CPU_NUMBER(reg) \
movl MY(CPU_ID), reg;
#ifndef __ASSEMBLER__
#include <kern/cpu_number.h>
#include <i386/apic.h>
#include <i386/percpu.h>
static inline int cpu_number_slow(void)
{
return cpu_id_lut[apic_get_current_cpu()];
}
static inline int cpu_number(void)
{
return percpu_get(int, cpu_id);
}
#endif
#else /* NCPUS == 1 */
#define MY(stm) (percpu_array + PERCPU_##stm)
#define CPU_NUMBER_NO_STACK(reg)
#define CPU_NUMBER_NO_GS(reg)
#define CPU_NUMBER(reg)
#define CX(addr,reg) addr
#endif /* NCPUS == 1 */
#endif /* _I386_CPU_NUMBER_H_ */
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