blob: 69a40757e21718c7c32c7e88969222c8165051c4 (
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
40
41
42
43
44
45
46
47
48
49
50
51
52
|
#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 {
struct task_struct *pcurrent; /* 0 Current process */
unsigned long dummy;
unsigned long kernelstack; /* 16 top of kernel stack for current */
unsigned long oldrsp; /* 24 user rsp for system call */
int irqcount; /* 32 Irq nesting counter. Starts -1 */
unsigned int cpunumber; /* 36 Logical CPU number */
#ifdef CONFIG_CC_STACKPROTECTOR
unsigned long stack_canary; /* 40 stack canary value */
/* gcc-ABI: this canary MUST be at
offset 40!!! */
#endif
char *irqstackptr;
short nodenumber; /* number of current node (32k max) */
short in_bootmem; /* pda lives in bootmem */
short mmu_state;
short isidle;
struct mm_struct *active_mm;
} ____cacheline_aligned_in_smp;
DECLARE_PER_CPU(struct x8664_pda, __pda);
extern void pda_init(int);
#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
#define PDA_STACKOFFSET (5*8)
#endif /* _ASM_X86_PDA_H */
|
