blob: ba46416634f033235bda131eea10937c7bdfbc17 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
#ifndef _ASM_X86_PDA_H
#define _ASM_X86_PDA_H
#ifndef __ASSEMBLY__
#include <linux/stddef.h>
#include <linux/types.h>
#include <linux/cache.h>
#include <linux/threads.h>
#include <asm/page.h>
#include <asm/percpu.h>
/* Per processor datastructure. %gs points to it while the kernel runs */
struct x8664_pda {
unsigned long unused1;
unsigned long unused2;
unsigned long unused3;
unsigned long unused4;
int unused5;
unsigned int unused6; /* 36 was cpunumber */
short in_bootmem; /* pda lives in bootmem */
} ____cacheline_aligned_in_smp;
DECLARE_PER_CPU(struct x8664_pda, __pda);
#define cpu_pda(cpu) (&per_cpu(__pda, cpu))
#define read_pda(field) percpu_read(__pda.field)
#define write_pda(field, val) percpu_write(__pda.field, val)
#define add_pda(field, val) percpu_add(__pda.field, val)
#define sub_pda(field, val) percpu_sub(__pda.field, val)
#define or_pda(field, val) percpu_or(__pda.field, val)
/* This is not atomic against other CPUs -- CPU preemption needs to be off */
#define test_and_clear_bit_pda(bit, field) \
x86_test_and_clear_bit_percpu(bit, __pda.field)
#endif
#endif /* _ASM_X86_PDA_H */
|
