| /* |
| * Copyright 2009-2015 Samy Al Bahra. |
| * Copyright 2017 Neale Ferguson |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #ifndef CK_PR_S390X_H |
| #define CK_PR_S390X_H |
| |
| #ifndef CK_PR_H |
| #error Do not include this file directly, use ck_pr.h |
| #endif |
| |
| #include <ck_cc.h> |
| #include <ck_md.h> |
| |
| /* |
| * The following represent supported atomic operations. |
| * These operations may be emulated. |
| */ |
| #include "ck_f_pr.h" |
| |
| /* |
| * Minimum interface requirement met. |
| */ |
| #define CK_F_PR |
| |
| /* |
| * This bounces the hardware thread from low to medium |
| * priority. I am unsure of the benefits of this approach |
| * but it is used by the Linux kernel. |
| */ |
| CK_CC_INLINE static void |
| ck_pr_stall(void) |
| { |
| __sync_synchronize(); |
| return; |
| } |
| |
| #define CK_PR_FENCE(T) \ |
| CK_CC_INLINE static void \ |
| ck_pr_fence_strict_##T(void) \ |
| { \ |
| __sync_synchronize(); \ |
| } |
| |
| /* |
| * These are derived from: |
| * http://www.ibm.com/developerworks/systems/articles/powerpc.html |
| */ |
| CK_PR_FENCE(atomic) |
| CK_PR_FENCE(atomic_store) |
| CK_PR_FENCE(atomic_load) |
| CK_PR_FENCE(store_atomic) |
| CK_PR_FENCE(load_atomic) |
| CK_PR_FENCE(store) |
| CK_PR_FENCE(store_load) |
| CK_PR_FENCE(load) |
| CK_PR_FENCE(load_store) |
| CK_PR_FENCE(memory) |
| CK_PR_FENCE(acquire) |
| CK_PR_FENCE(release) |
| CK_PR_FENCE(acqrel) |
| CK_PR_FENCE(lock) |
| CK_PR_FENCE(unlock) |
| |
| #undef CK_PR_FENCE |
| |
| #define CK_PR_LOAD(S, M, T, C, I) \ |
| CK_CC_INLINE static T \ |
| ck_pr_md_load_##S(const M *target) \ |
| { \ |
| T r; \ |
| __asm__ __volatile__(I "\t%0, %1\n" \ |
| : "=r" (r) \ |
| : "Q" (*(const C *)target) \ |
| : "memory"); \ |
| return (r); \ |
| } |
| |
| CK_PR_LOAD(ptr, void, void *, uint64_t, "lg") |
| |
| #define CK_PR_LOAD_S(S, T, I) CK_PR_LOAD(S, T, T, T, I) |
| |
| CK_PR_LOAD_S(64, uint64_t, "lg") |
| CK_PR_LOAD_S(32, uint32_t, "llgf") |
| CK_PR_LOAD_S(16, uint16_t, "llgh") |
| CK_PR_LOAD_S(8, uint8_t, "llgc") |
| CK_PR_LOAD_S(uint, unsigned int, "llgf") |
| CK_PR_LOAD_S(int, int, "llgf") |
| CK_PR_LOAD_S(short, short, "lgh") |
| CK_PR_LOAD_S(char, char, "lgb") |
| #ifndef CK_PR_DISABLE_DOUBLE |
| CK_CC_INLINE static double |
| ck_pr_md_load_double(const double *target) |
| { |
| double r; |
| __asm__ __volatile__("ld %0, %1\n" |
| : "=f" (r) |
| : "Q" (*(const double *)target) |
| : "memory"); |
| return (r); |
| } |
| #endif |
| |
| #undef CK_PR_LOAD_S |
| #undef CK_PR_LOAD |
| |
| #define CK_PR_STORE(S, M, T, C, I) \ |
| CK_CC_INLINE static void \ |
| ck_pr_md_store_##S(M *target, T v) \ |
| { \ |
| __asm__ __volatile__(I "\t%1, %0\n" \ |
| : "=Q" (*(C *)target) \ |
| : "r" (v) \ |
| : "memory"); \ |
| return; \ |
| } |
| |
| CK_PR_STORE(ptr, void, const void *, uint64_t, "stg") |
| |
| #define CK_PR_STORE_S(S, T, I) CK_PR_STORE(S, T, T, T, I) |
| |
| CK_PR_STORE_S(64, uint64_t, "stg") |
| CK_PR_STORE_S(32, uint32_t, "st") |
| CK_PR_STORE_S(16, uint16_t, "sth") |
| CK_PR_STORE_S(8, uint8_t, "stc") |
| CK_PR_STORE_S(uint, unsigned int, "st") |
| CK_PR_STORE_S(int, int, "st") |
| CK_PR_STORE_S(short, short, "sth") |
| CK_PR_STORE_S(char, char, "stc") |
| #ifndef CK_PR_DISABLE_DOUBLE |
| CK_CC_INLINE static void |
| ck_pr_md_store_double(double *target, double v) |
| { |
| __asm__ __volatile__(" std %1, %0\n" |
| : "=Q" (*(double *)target) |
| : "f" (v) |
| : "0", "memory"); |
| } |
| #endif |
| |
| #undef CK_PR_STORE_S |
| #undef CK_PR_STORE |
| |
| CK_CC_INLINE static bool |
| ck_pr_cas_64_value(uint64_t *target, uint64_t compare, uint64_t set, uint64_t *value) |
| { |
| *value = __sync_val_compare_and_swap(target,compare,set); |
| return (*value == compare); |
| } |
| |
| CK_CC_INLINE static bool |
| ck_pr_cas_ptr_value(void *target, void *compare, void *set, void *value) |
| { |
| uintptr_t previous; |
| |
| previous = __sync_val_compare_and_swap((uintptr_t *) target, |
| (uintptr_t) compare, |
| (uintptr_t) set); |
| *((uintptr_t *) value) = previous; |
| return (previous == (uintptr_t) compare); |
| } |
| |
| CK_CC_INLINE static bool |
| ck_pr_cas_64(uint64_t *target, uint64_t compare, uint64_t set) |
| { |
| return(__sync_bool_compare_and_swap(target,compare,set)); |
| } |
| |
| CK_CC_INLINE static bool |
| ck_pr_cas_ptr(void *target, void *compare, void *set) |
| { |
| return(__sync_bool_compare_and_swap((uintptr_t *) target, |
| (uintptr_t) compare, |
| (uintptr_t) set)); |
| } |
| |
| #define CK_PR_CAS(N, T) \ |
| CK_CC_INLINE static bool \ |
| ck_pr_cas_##N##_value(T *target, T compare, T set, T *value) \ |
| { \ |
| *value = __sync_val_compare_and_swap(target, \ |
| compare, \ |
| set); \ |
| return(*value == compare); \ |
| } \ |
| CK_CC_INLINE static bool \ |
| ck_pr_cas_##N(T *target, T compare, T set) \ |
| { \ |
| return(__sync_bool_compare_and_swap(target, \ |
| compare, \ |
| set)); \ |
| } |
| |
| CK_PR_CAS(32, uint32_t) |
| CK_PR_CAS(uint, unsigned int) |
| CK_PR_CAS(int, int) |
| |
| #undef CK_PR_CAS |
| |
| CK_CC_INLINE static void * |
| ck_pr_fas_ptr(void *target, void *v) |
| { |
| return((void *)__atomic_exchange_n((uintptr_t *) target, (uintptr_t) v, __ATOMIC_ACQUIRE)); |
| } |
| |
| #define CK_PR_FAS(N, M, T) \ |
| CK_CC_INLINE static T \ |
| ck_pr_fas_##N(M *target, T v) \ |
| { \ |
| return(__atomic_exchange_n(target, v, __ATOMIC_ACQUIRE)); \ |
| } |
| |
| CK_PR_FAS(64, uint64_t, uint64_t) |
| CK_PR_FAS(32, uint32_t, uint32_t) |
| CK_PR_FAS(int, int, int) |
| CK_PR_FAS(uint, unsigned int, unsigned int) |
| |
| #ifndef CK_PR_DISABLE_DOUBLE |
| CK_CC_INLINE static double |
| ck_pr_fas_double(double *target, double *v) |
| { |
| double previous; |
| |
| __asm__ __volatile__ (" lg 1,%2\n" |
| "0: lg 0,%1\n" |
| " csg 0,1,%1\n" |
| " jnz 0b\n" |
| " ldgr %0,0\n" |
| : "=f" (previous) |
| : "Q" (target), "Q" (v) |
| : "0", "1", "cc", "memory"); |
| return (previous); |
| } |
| #endif |
| |
| #undef CK_PR_FAS |
| |
| /* |
| * Atomic store-only binary operations. |
| */ |
| #define CK_PR_BINARY(K, S, M, T) \ |
| CK_CC_INLINE static void \ |
| ck_pr_##K##_##S(M *target, T d) \ |
| { \ |
| d = __sync_fetch_and_##K((T *)target, d); \ |
| return; \ |
| } |
| |
| #define CK_PR_BINARY_S(K, S, T) CK_PR_BINARY(K, S, T, T) |
| |
| #define CK_PR_GENERATE(K) \ |
| CK_PR_BINARY(K, ptr, void, void *) \ |
| CK_PR_BINARY_S(K, char, char) \ |
| CK_PR_BINARY_S(K, int, int) \ |
| CK_PR_BINARY_S(K, uint, unsigned int) \ |
| CK_PR_BINARY_S(K, 64, uint64_t) \ |
| CK_PR_BINARY_S(K, 32, uint32_t) \ |
| CK_PR_BINARY_S(K, 16, uint16_t) \ |
| CK_PR_BINARY_S(K, 8, uint8_t) |
| |
| CK_PR_GENERATE(add) |
| CK_PR_GENERATE(sub) |
| CK_PR_GENERATE(and) |
| CK_PR_GENERATE(or) |
| CK_PR_GENERATE(xor) |
| |
| #undef CK_PR_GENERATE |
| #undef CK_PR_BINARY_S |
| #undef CK_PR_BINARY |
| |
| #define CK_PR_UNARY(S, M, T) \ |
| CK_CC_INLINE static void \ |
| ck_pr_inc_##S(M *target) \ |
| { \ |
| ck_pr_add_##S(target, (T)1); \ |
| return; \ |
| } \ |
| CK_CC_INLINE static void \ |
| ck_pr_dec_##S(M *target) \ |
| { \ |
| ck_pr_sub_##S(target, (T)1); \ |
| return; \ |
| } |
| |
| #define CK_PR_UNARY_X(S, M) \ |
| CK_CC_INLINE static void \ |
| ck_pr_not_##S(M *target) \ |
| { \ |
| M newval; \ |
| do { \ |
| newval = ~(*target); \ |
| } while (!__sync_bool_compare_and_swap(target, \ |
| *target, \ |
| newval)); \ |
| } \ |
| CK_CC_INLINE static void \ |
| ck_pr_neg_##S(M *target) \ |
| { \ |
| M newval; \ |
| do { \ |
| newval = -(*target); \ |
| } while (!__sync_bool_compare_and_swap(target, \ |
| *target, \ |
| newval)); \ |
| } |
| |
| #define CK_PR_UNARY_S(S, M) CK_PR_UNARY(S, M, M) \ |
| CK_PR_UNARY_X(S, M) |
| |
| CK_PR_UNARY(ptr, void, void *) |
| CK_PR_UNARY_S(char, char) |
| CK_PR_UNARY_S(int, int) |
| CK_PR_UNARY_S(uint, unsigned int) |
| CK_PR_UNARY_S(64, uint64_t) |
| CK_PR_UNARY_S(32, uint32_t) |
| CK_PR_UNARY_S(16, uint16_t) |
| CK_PR_UNARY_S(8, uint8_t) |
| |
| #undef CK_PR_UNARY_S |
| #undef CK_PR_UNARY |
| |
| CK_CC_INLINE static void * |
| ck_pr_faa_ptr(void *target, uintptr_t delta) |
| { |
| uintptr_t previous; |
| |
| previous = __sync_fetch_and_add((uintptr_t *) target, delta); |
| |
| return (void *)(previous); |
| } |
| |
| #define CK_PR_FAA(S, T) \ |
| CK_CC_INLINE static T \ |
| ck_pr_faa_##S(T *target, T delta) \ |
| { \ |
| T previous; \ |
| \ |
| previous = __sync_fetch_and_add(target, delta); \ |
| \ |
| return (previous); \ |
| } |
| |
| CK_PR_FAA(64, uint64_t) |
| CK_PR_FAA(32, uint32_t) |
| CK_PR_FAA(uint, unsigned int) |
| CK_PR_FAA(int, int) |
| |
| #undef CK_PR_FAA |
| |
| #endif /* CK_PR_S390X_H */ |