mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-21 00:42:16 +00:00
3334052a32
Form a single percpu.h from percpu_32.h and percpu_64.h. Both are now pretty small so this is simply adding them together. Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
#ifndef _ASM_X86_PERCPU_H_
|
|
#define _ASM_X86_PERCPU_H_
|
|
|
|
#ifdef CONFIG_X86_64
|
|
#include <linux/compiler.h>
|
|
|
|
/* Same as asm-generic/percpu.h, except that we store the per cpu offset
|
|
in the PDA. Longer term the PDA and every per cpu variable
|
|
should be just put into a single section and referenced directly
|
|
from %gs */
|
|
|
|
#ifdef CONFIG_SMP
|
|
#include <asm/pda.h>
|
|
|
|
#define __per_cpu_offset(cpu) (cpu_pda(cpu)->data_offset)
|
|
#define __my_cpu_offset read_pda(data_offset)
|
|
|
|
#define per_cpu_offset(x) (__per_cpu_offset(x))
|
|
|
|
#endif
|
|
#include <asm-generic/percpu.h>
|
|
|
|
DECLARE_PER_CPU(struct x8664_pda, pda);
|
|
|
|
#else /* CONFIG_X86_64 */
|
|
|
|
#ifdef __ASSEMBLY__
|
|
|
|
/*
|
|
* PER_CPU finds an address of a per-cpu variable.
|
|
*
|
|
* Args:
|
|
* var - variable name
|
|
* reg - 32bit register
|
|
*
|
|
* The resulting address is stored in the "reg" argument.
|
|
*
|
|
* Example:
|
|
* PER_CPU(cpu_gdt_descr, %ebx)
|
|
*/
|
|
#ifdef CONFIG_SMP
|
|
#define PER_CPU(var, reg) \
|
|
movl %fs:per_cpu__##this_cpu_off, reg; \
|
|
lea per_cpu__##var(reg), reg
|
|
#define PER_CPU_VAR(var) %fs:per_cpu__##var
|
|
#else /* ! SMP */
|
|
#define PER_CPU(var, reg) \
|
|
movl $per_cpu__##var, reg
|
|
#define PER_CPU_VAR(var) per_cpu__##var
|
|
#endif /* SMP */
|
|
|
|
#else /* ...!ASSEMBLY */
|
|
|
|
/*
|
|
* PER_CPU finds an address of a per-cpu variable.
|
|
*
|
|
* Args:
|
|
* var - variable name
|
|
* cpu - 32bit register containing the current CPU number
|
|
*
|
|
* The resulting address is stored in the "cpu" argument.
|
|
*
|
|
* Example:
|
|
* PER_CPU(cpu_gdt_descr, %ebx)
|
|
*/
|
|
#ifdef CONFIG_SMP
|
|
|
|
#define __my_cpu_offset x86_read_percpu(this_cpu_off)
|
|
|
|
/* fs segment starts at (positive) offset == __per_cpu_offset[cpu] */
|
|
#define __percpu_seg "%%fs:"
|
|
|
|
#else /* !SMP */
|
|
|
|
#define __percpu_seg ""
|
|
|
|
#endif /* SMP */
|
|
|
|
#include <asm-generic/percpu.h>
|
|
|
|
/* We can use this directly for local CPU (faster). */
|
|
DECLARE_PER_CPU(unsigned long, this_cpu_off);
|
|
|
|
/* For arch-specific code, we can use direct single-insn ops (they
|
|
* don't give an lvalue though). */
|
|
extern void __bad_percpu_size(void);
|
|
|
|
#define percpu_to_op(op,var,val) \
|
|
do { \
|
|
typedef typeof(var) T__; \
|
|
if (0) { T__ tmp__; tmp__ = (val); } \
|
|
switch (sizeof(var)) { \
|
|
case 1: \
|
|
asm(op "b %1,"__percpu_seg"%0" \
|
|
: "+m" (var) \
|
|
:"ri" ((T__)val)); \
|
|
break; \
|
|
case 2: \
|
|
asm(op "w %1,"__percpu_seg"%0" \
|
|
: "+m" (var) \
|
|
:"ri" ((T__)val)); \
|
|
break; \
|
|
case 4: \
|
|
asm(op "l %1,"__percpu_seg"%0" \
|
|
: "+m" (var) \
|
|
:"ri" ((T__)val)); \
|
|
break; \
|
|
default: __bad_percpu_size(); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define percpu_from_op(op,var) \
|
|
({ \
|
|
typeof(var) ret__; \
|
|
switch (sizeof(var)) { \
|
|
case 1: \
|
|
asm(op "b "__percpu_seg"%1,%0" \
|
|
: "=r" (ret__) \
|
|
: "m" (var)); \
|
|
break; \
|
|
case 2: \
|
|
asm(op "w "__percpu_seg"%1,%0" \
|
|
: "=r" (ret__) \
|
|
: "m" (var)); \
|
|
break; \
|
|
case 4: \
|
|
asm(op "l "__percpu_seg"%1,%0" \
|
|
: "=r" (ret__) \
|
|
: "m" (var)); \
|
|
break; \
|
|
default: __bad_percpu_size(); \
|
|
} \
|
|
ret__; })
|
|
|
|
#define x86_read_percpu(var) percpu_from_op("mov", per_cpu__##var)
|
|
#define x86_write_percpu(var,val) percpu_to_op("mov", per_cpu__##var, val)
|
|
#define x86_add_percpu(var,val) percpu_to_op("add", per_cpu__##var, val)
|
|
#define x86_sub_percpu(var,val) percpu_to_op("sub", per_cpu__##var, val)
|
|
#define x86_or_percpu(var,val) percpu_to_op("or", per_cpu__##var, val)
|
|
#endif /* !__ASSEMBLY__ */
|
|
#endif /* !CONFIG_X86_64 */
|
|
#endif /* _ASM_X86_PERCPU_H_ */
|