1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 **************************************************************************** 11 ****************************************************************************/ 12 #ifndef X86_64_PDA_H 13 #define X86_64_PDA_H 14 15 #ifndef __ASSEMBLY__ 16 #include <linux/stddef.h> 17 #include <linux/types.h> 18 #include <linux/cache.h> 19 #include <asm/page.h> 20 21 struct x8664_pda { 22 struct task_struct *pcurrent; 23 unsigned long data_offset; 24 unsigned long kernelstack; 25 unsigned long oldrsp; 26 int irqcount; 27 int cpunumber; 28 char *irqstackptr; 29 int nodenumber; 30 unsigned int __softirq_pending; 31 unsigned int __nmi_count; 32 short mmu_state; 33 short isidle; 34 struct mm_struct *active_mm; 35 unsigned apic_timer_irqs; 36 unsigned irq0_irqs; 37 unsigned irq_resched_count; 38 unsigned irq_call_count; 39 unsigned irq_tlb_count; 40 unsigned irq_thermal_count; 41 unsigned irq_threshold_count; 42 unsigned irq_spurious_count; 43 } ____cacheline_aligned_in_smp; 44 45 #define cpu_pda(i) (_cpu_pda[i]) 46 47 #define pda_offset(field) offsetof(struct x8664_pda, field) 48 49 #define pda_to_op(op,field,val) do { typedef typeof(_proxy_pda.field) T__; if (0) { T__ tmp__; tmp__ = (val); } switch (sizeof(_proxy_pda.field)) { case 2: asm(op "w %1,%%gs:%c2" : "+m" (_proxy_pda.field) : "ri" ((T__)val), "i"(pda_offset(field))); break; case 4: asm(op "l %1,%%gs:%c2" : "+m" (_proxy_pda.field) : "ri" ((T__)val), "i" (pda_offset(field))); break; case 8: asm(op "q %1,%%gs:%c2": "+m" (_proxy_pda.field) : "ri" ((T__)val), "i"(pda_offset(field))); break; default: __bad_pda_field(); } } while (0) 50 51 #define pda_from_op(op,field) ({ typeof(_proxy_pda.field) ret__; switch (sizeof(_proxy_pda.field)) { case 2: asm(op "w %%gs:%c1,%0" : "=r" (ret__) : "i" (pda_offset(field)), "m" (_proxy_pda.field)); break; case 4: asm(op "l %%gs:%c1,%0": "=r" (ret__): "i" (pda_offset(field)), "m" (_proxy_pda.field)); break; case 8: asm(op "q %%gs:%c1,%0": "=r" (ret__) : "i" (pda_offset(field)), "m" (_proxy_pda.field)); break; default: __bad_pda_field(); } ret__; }) 52 53 #define read_pda(field) pda_from_op("mov",field) 54 #define write_pda(field,val) pda_to_op("mov",field,val) 55 #define add_pda(field,val) pda_to_op("add",field,val) 56 #define sub_pda(field,val) pda_to_op("sub",field,val) 57 #define or_pda(field,val) pda_to_op("or",field,val) 58 59 #define test_and_clear_bit_pda(bit,field) ({ int old__; asm volatile("btr %2,%%gs:%c3\n\tsbbl %0,%0" : "=r" (old__), "+m" (_proxy_pda.field) : "dIr" (bit), "i" (pda_offset(field)) : "memory"); old__; }) 60 61 #endif 62 63 #define PDA_STACKOFFSET (5*8) 64 65 #endif 66
