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 __ARCH_I386_PERCPU__ 13 #define __ARCH_I386_PERCPU__ 14 15 #ifdef __ASSEMBLY__ 16 17 #define PER_CPU(var, reg) movl $per_cpu__##var, reg 18 #define PER_CPU_VAR(var) per_cpu__##var 19 20 #else 21 22 #include <asm-generic/percpu.h> 23 #define __percpu_seg "" 24 25 #define percpu_to_op(op,var,val) do { typedef typeof(var) T__; if (0) { T__ tmp__; tmp__ = (val); } switch (sizeof(var)) { case 1: asm(op "b %1,"__percpu_seg"%0" : "+m" (var) :"ri" ((T__)val)); break; case 2: asm(op "w %1,"__percpu_seg"%0" : "+m" (var) :"ri" ((T__)val)); break; case 4: asm(op "l %1,"__percpu_seg"%0" : "+m" (var) :"ri" ((T__)val)); break; default: __bad_percpu_size(); } } while (0) 26 27 #define percpu_from_op(op,var) ({ typeof(var) ret__; switch (sizeof(var)) { case 1: asm(op "b "__percpu_seg"%1,%0" : "=r" (ret__) : "m" (var)); break; case 2: asm(op "w "__percpu_seg"%1,%0" : "=r" (ret__) : "m" (var)); break; case 4: asm(op "l "__percpu_seg"%1,%0" : "=r" (ret__) : "m" (var)); break; default: __bad_percpu_size(); } ret__; }) 28 29 #define x86_read_percpu(var) percpu_from_op("mov", per_cpu__##var) 30 #define x86_write_percpu(var,val) percpu_to_op("mov", per_cpu__##var, val) 31 #define x86_add_percpu(var,val) percpu_to_op("add", per_cpu__##var, val) 32 #define x86_sub_percpu(var,val) percpu_to_op("sub", per_cpu__##var, val) 33 #define x86_or_percpu(var,val) percpu_to_op("or", per_cpu__##var, val) 34 #endif 35 36 #endif 37