diff options
Diffstat (limited to 'arch/x86/include/asm/pda.h')
| -rw-r--r-- | arch/x86/include/asm/pda.h | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/arch/x86/include/asm/pda.h b/arch/x86/include/asm/pda.h deleted file mode 100644 index 2fbfff88df37..000000000000 --- a/arch/x86/include/asm/pda.h +++ /dev/null | |||
| @@ -1,137 +0,0 @@ | |||
| 1 | #ifndef _ASM_X86_PDA_H | ||
| 2 | #define _ASM_X86_PDA_H | ||
| 3 | |||
| 4 | #ifndef __ASSEMBLY__ | ||
| 5 | #include <linux/stddef.h> | ||
| 6 | #include <linux/types.h> | ||
| 7 | #include <linux/cache.h> | ||
| 8 | #include <asm/page.h> | ||
| 9 | |||
| 10 | /* Per processor datastructure. %gs points to it while the kernel runs */ | ||
| 11 | struct x8664_pda { | ||
| 12 | struct task_struct *pcurrent; /* 0 Current process */ | ||
| 13 | unsigned long data_offset; /* 8 Per cpu data offset from linker | ||
| 14 | address */ | ||
| 15 | unsigned long kernelstack; /* 16 top of kernel stack for current */ | ||
| 16 | unsigned long oldrsp; /* 24 user rsp for system call */ | ||
| 17 | int irqcount; /* 32 Irq nesting counter. Starts -1 */ | ||
| 18 | unsigned int cpunumber; /* 36 Logical CPU number */ | ||
| 19 | #ifdef CONFIG_CC_STACKPROTECTOR | ||
| 20 | unsigned long stack_canary; /* 40 stack canary value */ | ||
| 21 | /* gcc-ABI: this canary MUST be at | ||
| 22 | offset 40!!! */ | ||
| 23 | #endif | ||
| 24 | char *irqstackptr; | ||
| 25 | short nodenumber; /* number of current node (32k max) */ | ||
| 26 | short in_bootmem; /* pda lives in bootmem */ | ||
| 27 | unsigned int __softirq_pending; | ||
| 28 | unsigned int __nmi_count; /* number of NMI on this CPUs */ | ||
| 29 | short mmu_state; | ||
| 30 | short isidle; | ||
| 31 | struct mm_struct *active_mm; | ||
| 32 | unsigned apic_timer_irqs; | ||
| 33 | unsigned irq0_irqs; | ||
| 34 | unsigned irq_resched_count; | ||
| 35 | unsigned irq_call_count; | ||
| 36 | unsigned irq_tlb_count; | ||
| 37 | unsigned irq_thermal_count; | ||
| 38 | unsigned irq_threshold_count; | ||
| 39 | unsigned irq_spurious_count; | ||
| 40 | } ____cacheline_aligned_in_smp; | ||
| 41 | |||
| 42 | extern struct x8664_pda **_cpu_pda; | ||
| 43 | extern void pda_init(int); | ||
| 44 | |||
| 45 | #define cpu_pda(i) (_cpu_pda[i]) | ||
| 46 | |||
| 47 | /* | ||
| 48 | * There is no fast way to get the base address of the PDA, all the accesses | ||
| 49 | * have to mention %fs/%gs. So it needs to be done this Torvaldian way. | ||
| 50 | */ | ||
| 51 | extern void __bad_pda_field(void) __attribute__((noreturn)); | ||
| 52 | |||
| 53 | /* | ||
| 54 | * proxy_pda doesn't actually exist, but tell gcc it is accessed for | ||
| 55 | * all PDA accesses so it gets read/write dependencies right. | ||
| 56 | */ | ||
| 57 | extern struct x8664_pda _proxy_pda; | ||
| 58 | |||
| 59 | #define pda_offset(field) offsetof(struct x8664_pda, field) | ||
| 60 | |||
| 61 | #define pda_to_op(op, field, val) \ | ||
| 62 | do { \ | ||
| 63 | typedef typeof(_proxy_pda.field) T__; \ | ||
| 64 | if (0) { T__ tmp__; tmp__ = (val); } /* type checking */ \ | ||
| 65 | switch (sizeof(_proxy_pda.field)) { \ | ||
| 66 | case 2: \ | ||
| 67 | asm(op "w %1,%%gs:%c2" : \ | ||
| 68 | "+m" (_proxy_pda.field) : \ | ||
| 69 | "ri" ((T__)val), \ | ||
| 70 | "i"(pda_offset(field))); \ | ||
| 71 | break; \ | ||
| 72 | case 4: \ | ||
| 73 | asm(op "l %1,%%gs:%c2" : \ | ||
| 74 | "+m" (_proxy_pda.field) : \ | ||
| 75 | "ri" ((T__)val), \ | ||
| 76 | "i" (pda_offset(field))); \ | ||
| 77 | break; \ | ||
| 78 | case 8: \ | ||
| 79 | asm(op "q %1,%%gs:%c2": \ | ||
| 80 | "+m" (_proxy_pda.field) : \ | ||
| 81 | "ri" ((T__)val), \ | ||
| 82 | "i"(pda_offset(field))); \ | ||
| 83 | break; \ | ||
| 84 | default: \ | ||
| 85 | __bad_pda_field(); \ | ||
| 86 | } \ | ||
| 87 | } while (0) | ||
| 88 | |||
| 89 | #define pda_from_op(op, field) \ | ||
| 90 | ({ \ | ||
| 91 | typeof(_proxy_pda.field) ret__; \ | ||
| 92 | switch (sizeof(_proxy_pda.field)) { \ | ||
| 93 | case 2: \ | ||
| 94 | asm(op "w %%gs:%c1,%0" : \ | ||
| 95 | "=r" (ret__) : \ | ||
| 96 | "i" (pda_offset(field)), \ | ||
| 97 | "m" (_proxy_pda.field)); \ | ||
| 98 | break; \ | ||
| 99 | case 4: \ | ||
| 100 | asm(op "l %%gs:%c1,%0": \ | ||
| 101 | "=r" (ret__): \ | ||
| 102 | "i" (pda_offset(field)), \ | ||
| 103 | "m" (_proxy_pda.field)); \ | ||
| 104 | break; \ | ||
| 105 | case 8: \ | ||
| 106 | asm(op "q %%gs:%c1,%0": \ | ||
| 107 | "=r" (ret__) : \ | ||
| 108 | "i" (pda_offset(field)), \ | ||
| 109 | "m" (_proxy_pda.field)); \ | ||
| 110 | break; \ | ||
| 111 | default: \ | ||
| 112 | __bad_pda_field(); \ | ||
| 113 | } \ | ||
| 114 | ret__; \ | ||
| 115 | }) | ||
| 116 | |||
| 117 | #define read_pda(field) pda_from_op("mov", field) | ||
| 118 | #define write_pda(field, val) pda_to_op("mov", field, val) | ||
| 119 | #define add_pda(field, val) pda_to_op("add", field, val) | ||
| 120 | #define sub_pda(field, val) pda_to_op("sub", field, val) | ||
| 121 | #define or_pda(field, val) pda_to_op("or", field, val) | ||
| 122 | |||
| 123 | /* This is not atomic against other CPUs -- CPU preemption needs to be off */ | ||
| 124 | #define test_and_clear_bit_pda(bit, field) \ | ||
| 125 | ({ \ | ||
| 126 | int old__; \ | ||
| 127 | asm volatile("btr %2,%%gs:%c3\n\tsbbl %0,%0" \ | ||
| 128 | : "=r" (old__), "+m" (_proxy_pda.field) \ | ||
| 129 | : "dIr" (bit), "i" (pda_offset(field)) : "memory");\ | ||
| 130 | old__; \ | ||
| 131 | }) | ||
| 132 | |||
| 133 | #endif | ||
| 134 | |||
| 135 | #define PDA_STACKOFFSET (5*8) | ||
| 136 | |||
| 137 | #endif /* _ASM_X86_PDA_H */ | ||