projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1965aae3 PA |
1 | #ifndef _ASM_X86_PDA_H |
| 2 | #define _ASM_X86_PDA_H | |
| 1da177e4 LT |
3 | |
| 4 | #ifndef __ASSEMBLY__ | |
| 5 | #include <linux/stddef.h> | |
| 6 | #include <linux/types.h> | |
| 7 | #include <linux/cache.h> | |
| c8f3329a | 8 | #include <linux/threads.h> |
| b556b35e | 9 | #include <asm/page.h> |
| b12d8db8 | 10 | #include <asm/percpu.h> |
| 1da177e4 | 11 | |
| fe758fb1 | 12 | /* Per processor datastructure. %gs points to it while the kernel runs */ |
| 1da177e4 | 13 | struct x8664_pda { |
| c6f5e0ac BG |
14 | unsigned long unused1; |
| 15 | unsigned long unused2; | |
| 9af45651 | 16 | unsigned long unused3; |
| fe758fb1 CG |
17 | unsigned long oldrsp; /* 24 user rsp for system call */ |
| 18 | int irqcount; /* 32 Irq nesting counter. Starts -1 */ | |
| ea927906 | 19 | unsigned int unused6; /* 36 was cpunumber */ |
| 0a425405 AV |
20 | #ifdef CONFIG_CC_STACKPROTECTOR |
| 21 | unsigned long stack_canary; /* 40 stack canary value */ | |
| 22 | /* gcc-ABI: this canary MUST be at | |
| 23 | offset 40!!! */ | |
| 24 | #endif | |
| 3461b0af MT |
25 | short nodenumber; /* number of current node (32k max) */ |
| 26 | short in_bootmem; /* pda lives in bootmem */ | |
| a15da49d | 27 | short isidle; |
| b9169116 | 28 | } ____cacheline_aligned_in_smp; |
| 1da177e4 | 29 | |
| b12d8db8 | 30 | DECLARE_PER_CPU(struct x8664_pda, __pda); |
| 40fec50a | 31 | extern void pda_init(int); |
| df79efde | 32 | |
| b12d8db8 | 33 | #define cpu_pda(cpu) (&per_cpu(__pda, cpu)) |
| 1da177e4 | 34 | |
| 6dbde353 IM |
35 | #define read_pda(field) percpu_read(__pda.field) |
| 36 | #define write_pda(field, val) percpu_write(__pda.field, val) | |
| 37 | #define add_pda(field, val) percpu_add(__pda.field, val) | |
| 38 | #define sub_pda(field, val) percpu_sub(__pda.field, val) | |
| 39 | #define or_pda(field, val) percpu_or(__pda.field, val) | |
| 1da177e4 | 40 | |
| 9446868b | 41 | /* This is not atomic against other CPUs -- CPU preemption needs to be off */ |
| 46e1abc6 | 42 | #define test_and_clear_bit_pda(bit, field) \ |
| 49357d19 | 43 | x86_test_and_clear_bit_percpu(bit, __pda.field) |
| 9446868b | 44 | |
| 1da177e4 LT |
45 | #endif |
| 46 | ||
| 1965aae3 | 47 | #endif /* _ASM_X86_PDA_H */ |