5 #include <linux/stddef.h>
6 #include <linux/types.h>
7 #include <linux/cache.h>
8 #include <linux/threads.h>
10 #include <asm/percpu.h>
12 /* Per processor datastructure. %gs points to it while the kernel runs */
14 struct task_struct *pcurrent; /* 0 Current process */
16 unsigned long kernelstack; /* 16 top of kernel stack for current */
17 unsigned long oldrsp; /* 24 user rsp for system call */
18 int irqcount; /* 32 Irq nesting counter. Starts -1 */
19 unsigned int cpunumber; /* 36 Logical CPU number */
20 #ifdef CONFIG_CC_STACKPROTECTOR
21 unsigned long stack_canary; /* 40 stack canary value */
22 /* gcc-ABI: this canary MUST be at
26 short nodenumber; /* number of current node (32k max) */
27 short in_bootmem; /* pda lives in bootmem */
28 unsigned int __softirq_pending;
29 unsigned int __nmi_count; /* number of NMI on this CPUs */
32 struct mm_struct *active_mm;
33 unsigned apic_timer_irqs;
35 unsigned irq_resched_count;
36 unsigned irq_call_count;
37 unsigned irq_tlb_count;
38 unsigned irq_thermal_count;
39 unsigned irq_threshold_count;
40 unsigned irq_spurious_count;
41 } ____cacheline_aligned_in_smp;
43 DECLARE_PER_CPU(struct x8664_pda, __pda);
44 extern void pda_init(int);
46 #define cpu_pda(cpu) (&per_cpu(__pda, cpu))
48 #define read_pda(field) percpu_read(__pda.field)
49 #define write_pda(field, val) percpu_write(__pda.field, val)
50 #define add_pda(field, val) percpu_add(__pda.field, val)
51 #define sub_pda(field, val) percpu_sub(__pda.field, val)
52 #define or_pda(field, val) percpu_or(__pda.field, val)
54 /* This is not atomic against other CPUs -- CPU preemption needs to be off */
55 #define test_and_clear_bit_pda(bit, field) \
56 x86_test_and_clear_bit_percpu(bit, __pda.field)
60 #define PDA_STACKOFFSET (5*8)
62 #endif /* _ASM_X86_PDA_H */