1#ifndef __ARCH_S390_PERCPU__ 2#define __ARCH_S390_PERCPU__ 3 4#include <linux/preempt.h> 5#include <asm/cmpxchg.h> 6 7/* 8 * s390 uses its own implementation for per cpu data, the offset of 9 * the cpu local data area is cached in the cpu's lowcore memory. 10 */ 11#define __my_cpu_offset S390_lowcore.percpu_offset 12 13/* 14 * For 64 bit module code, the module may be more than 4G above the 15 * per cpu area, use weak definitions to force the compiler to 16 * generate external references. 17 */ 18#if defined(CONFIG_SMP) && defined(__s390x__) && defined(MODULE) 19#define ARCH_NEEDS_WEAK_PER_CPU 20#endif 21 22#define arch_this_cpu_to_op(pcp, val, op) \ 23do { \ 24 typedef typeof(pcp) pcp_op_T__; \ 25 pcp_op_T__ old__, new__, prev__; \ 26 pcp_op_T__ *ptr__; \ 27 preempt_disable(); \ 28 ptr__ = __this_cpu_ptr(&(pcp)); \ 29 prev__ = *ptr__; \ 30 do { \ 31 old__ = prev__; \ 32 new__ = old__ op (val); \ 33 switch (sizeof(*ptr__)) { \ 34 case 8: \ 35 prev__ = cmpxchg64(ptr__, old__, new__); \ 36 break; \ 37 default: \ 38 prev__ = cmpxchg(ptr__, old__, new__); \ 39 } \ 40 } while (prev__ != old__); \ 41 preempt_enable(); \ 42} while (0) 43 44#define this_cpu_add_1(pcp, val) arch_this_cpu_to_op(pcp, val, +) 45#define this_cpu_add_2(pcp, val) arch_this_cpu_to_op(pcp, val, +) 46#define this_cpu_add_4(pcp, val) arch_this_cpu_to_op(pcp, val, +) 47#define this_cpu_add_8(pcp, val) arch_this_cpu_to_op(pcp, val, +) 48 49#define this_cpu_and_1(pcp, val) arch_this_cpu_to_op(pcp, val, &) 50#define this_cpu_and_2(pcp, val) arch_this_cpu_to_op(pcp, val, &) 51#define this_cpu_and_4(pcp, val) arch_this_cpu_to_op(pcp, val, &) 52#define this_cpu_and_8(pcp, val) arch_this_cpu_to_op(pcp, val, &) 53 54#define this_cpu_or_1(pcp, val) arch_this_cpu_to_op(pcp, val, |) 55#define this_cpu_or_2(pcp, val) arch_this_cpu_to_op(pcp, val, |) 56#define this_cpu_or_4(pcp, val) arch_this_cpu_to_op(pcp, val, |) 57#define this_cpu_or_8(pcp, val) arch_this_cpu_to_op(pcp, val, |) 58 59#define this_cpu_xor_1(pcp, val) arch_this_cpu_to_op(pcp, val, ^) 60#define this_cpu_xor_2(pcp, val) arch_this_cpu_to_op(pcp, val, ^) 61#define this_cpu_xor_4(pcp, val) arch_this_cpu_to_op(pcp, val, ^) 62#define this_cpu_xor_8(pcp, val) arch_this_cpu_to_op(pcp, val, ^) 63 64#define arch_this_cpu_cmpxchg(pcp, oval, nval) \ 65({ \ 66 typedef typeof(pcp) pcp_op_T__; \ 67 pcp_op_T__ ret__; \ 68 pcp_op_T__ *ptr__; \ 69 preempt_disable(); \ 70 ptr__ = __this_cpu_ptr(&(pcp)); \ 71 switch (sizeof(*ptr__)) { \ 72 case 8: \ 73 ret__ = cmpxchg64(ptr__, oval, nval); \ 74 break; \ 75 default: \ 76 ret__ = cmpxchg(ptr__, oval, nval); \ 77 } \ 78 preempt_enable(); \ 79 ret__; \ 80}) 81 82#define this_cpu_cmpxchg_1(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval) 83#define this_cpu_cmpxchg_2(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval) 84#define this_cpu_cmpxchg_4(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval) 85#define this_cpu_cmpxchg_8(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval) 86 87#include <asm-generic/percpu.h> 88 89#endif /* __ARCH_S390_PERCPU__ */ 90