| /* |
| * Copyright 2009-2015 Samy Al Bahra. |
| * 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_PPC64_H |
| #define CK_PR_PPC64_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) |
| { |
| |
| __asm__ __volatile__("or 1, 1, 1;" |
| "or 2, 2, 2;" ::: "memory"); |
| return; |
| } |
| |
| #define CK_PR_FENCE(T, I) \ |
| CK_CC_INLINE static void \ |
| ck_pr_fence_strict_##T(void) \ |
| { \ |
| __asm__ __volatile__(I ::: "memory"); \ |
| } |
| |
| /* |
| * These are derived from: |
| * http://www.ibm.com/developerworks/systems/articles/powerpc.html |
| */ |
| CK_PR_FENCE(atomic, "lwsync") |
| CK_PR_FENCE(atomic_store, "lwsync") |
| CK_PR_FENCE(atomic_load, "sync") |
| CK_PR_FENCE(store_atomic, "lwsync") |
| CK_PR_FENCE(load_atomic, "lwsync") |
| CK_PR_FENCE(store, "lwsync") |
| CK_PR_FENCE(store_load, "sync") |
| CK_PR_FENCE(load, "lwsync") |
| CK_PR_FENCE(load_store, "lwsync") |
| CK_PR_FENCE(memory, "sync") |
| CK_PR_FENCE(acquire, "lwsync") |
| CK_PR_FENCE(release, "lwsync") |
| CK_PR_FENCE(acqrel, "lwsync") |
| CK_PR_FENCE(lock, "lwsync") |
| CK_PR_FENCE(unlock, "lwsync") |
| |
| #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 "%U1%X1 %0, %1" \ |
| : "=r" (r) \ |
| : "m" (*(const C *)target) \ |
| : "memory"); \ |
| return (r); \ |
| } |
| |
| CK_PR_LOAD(ptr, void, void *, uint64_t, "ld") |
| |
| #define CK_PR_LOAD_S(S, T, I) CK_PR_LOAD(S, T, T, T, I) |
| |
| CK_PR_LOAD_S(64, uint64_t, "ld") |
| CK_PR_LOAD_S(32, uint32_t, "lwz") |
| CK_PR_LOAD_S(16, uint16_t, "lhz") |
| CK_PR_LOAD_S(8, uint8_t, "lbz") |
| CK_PR_LOAD_S(uint, unsigned int, "lwz") |
| CK_PR_LOAD_S(int, int, "lwz") |
| CK_PR_LOAD_S(short, short, "lhz") |
| CK_PR_LOAD_S(char, char, "lbz") |
| #ifndef CK_PR_DISABLE_DOUBLE |
| CK_PR_LOAD_S(double, double, "ld") |
| #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 "%U0%X0 %1, %0" \ |
| : "=m" (*(C *)target) \ |
| : "r" (v) \ |
| : "memory"); \ |
| return; \ |
| } |
| |
| CK_PR_STORE(ptr, void, const void *, uint64_t, "std") |
| |
| #define CK_PR_STORE_S(S, T, I) CK_PR_STORE(S, T, T, T, I) |
| |
| CK_PR_STORE_S(64, uint64_t, "std") |
| CK_PR_STORE_S(32, uint32_t, "stw") |
| CK_PR_STORE_S(16, uint16_t, "sth") |
| CK_PR_STORE_S(8, uint8_t, "stb") |
| CK_PR_STORE_S(uint, unsigned int, "stw") |
| CK_PR_STORE_S(int, int, "stw") |
| CK_PR_STORE_S(short, short, "sth") |
| CK_PR_STORE_S(char, char, "stb") |
| #ifndef CK_PR_DISABLE_DOUBLE |
| CK_PR_STORE_S(double, double, "std") |
| #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) |
| { |
| uint64_t previous; |
| |
| __asm__ __volatile__("1:" |
| "ldarx %0, 0, %1;" |
| "cmpd 0, %0, %3;" |
| "bne- 2f;" |
| "stdcx. %2, 0, %1;" |
| "bne- 1b;" |
| "2:" |
| : "=&r" (previous) |
| : "r" (target), |
| "r" (set), |
| "r" (compare) |
| : "memory", "cc"); |
| |
| *value = previous; |
| return (previous == compare); |
| } |
| |
| CK_CC_INLINE static bool |
| ck_pr_cas_ptr_value(void *target, void *compare, void *set, void *value) |
| { |
| void *previous; |
| |
| __asm__ __volatile__("1:" |
| "ldarx %0, 0, %1;" |
| "cmpd 0, %0, %3;" |
| "bne- 2f;" |
| "stdcx. %2, 0, %1;" |
| "bne- 1b;" |
| "2:" |
| : "=&r" (previous) |
| : "r" (target), |
| "r" (set), |
| "r" (compare) |
| : "memory", "cc"); |
| |
| ck_pr_md_store_ptr(value, previous); |
| return (previous == compare); |
| } |
| |
| CK_CC_INLINE static bool |
| ck_pr_cas_64(uint64_t *target, uint64_t compare, uint64_t set) |
| { |
| uint64_t previous; |
| |
| __asm__ __volatile__("1:" |
| "ldarx %0, 0, %1;" |
| "cmpd 0, %0, %3;" |
| "bne- 2f;" |
| "stdcx. %2, 0, %1;" |
| "bne- 1b;" |
| "2:" |
| : "=&r" (previous) |
| : "r" (target), |
| "r" (set), |
| "r" (compare) |
| : "memory", "cc"); |
| |
| return (previous == compare); |
| } |
| |
| CK_CC_INLINE static bool |
| ck_pr_cas_ptr(void *target, void *compare, void *set) |
| { |
| void *previous; |
| |
| __asm__ __volatile__("1:" |
| "ldarx %0, 0, %1;" |
| "cmpd 0, %0, %3;" |
| "bne- 2f;" |
| "stdcx. %2, 0, %1;" |
| "bne- 1b;" |
| "2:" |
| : "=&r" (previous) |
| : "r" (target), |
| "r" (set), |
| "r" (compare) |
| : "memory", "cc"); |
| |
| return (previous == compare); |
| } |
| |
| #define CK_PR_CAS(N, T) \ |
| CK_CC_INLINE static bool \ |
| ck_pr_cas_##N##_value(T *target, T compare, T set, T *value) \ |
| { \ |
| T previous; \ |
| __asm__ __volatile__("1:" \ |
| "lwarx %0, 0, %1;" \ |
| "cmpw 0, %0, %3;" \ |
| "bne- 2f;" \ |
| "stwcx. %2, 0, %1;" \ |
| "bne- 1b;" \ |
| "2:" \ |
| : "=&r" (previous) \ |
| : "r" (target), \ |
| "r" (set), \ |
| "r" (compare) \ |
| : "memory", "cc"); \ |
| *value = previous; \ |
| return (previous == compare); \ |
| } \ |
| CK_CC_INLINE static bool \ |
| ck_pr_cas_##N(T *target, T compare, T set) \ |
| { \ |
| T previous; \ |
| __asm__ __volatile__("1:" \ |
| "lwarx %0, 0, %1;" \ |
| "cmpw 0, %0, %3;" \ |
| "bne- 2f;" \ |
| "stwcx. %2, 0, %1;" \ |
| "bne- 1b;" \ |
| "2:" \ |
| : "=&r" (previous) \ |
| : "r" (target), \ |
| "r" (set), \ |
| "r" (compare) \ |
| : "memory", "cc"); \ |
| return (previous == compare); \ |
| } |
| |
| CK_PR_CAS(32, uint32_t) |
| CK_PR_CAS(uint, unsigned int) |
| CK_PR_CAS(int, int) |
| |
| #undef CK_PR_CAS |
| |
| #define CK_PR_FAS(N, M, T, W) \ |
| CK_CC_INLINE static T \ |
| ck_pr_fas_##N(M *target, T v) \ |
| { \ |
| T previous; \ |
| __asm__ __volatile__("1:" \ |
| "l" W "arx %0, 0, %1;" \ |
| "st" W "cx. %2, 0, %1;" \ |
| "bne- 1b;" \ |
| : "=&r" (previous) \ |
| : "r" (target), \ |
| "r" (v) \ |
| : "memory", "cc"); \ |
| return (previous); \ |
| } |
| |
| CK_PR_FAS(64, uint64_t, uint64_t, "d") |
| CK_PR_FAS(32, uint32_t, uint32_t, "w") |
| #ifndef CK_PR_DISABLE_DOUBLE |
| CK_PR_FAS(double, double, double, "d") |
| #endif |
| CK_PR_FAS(ptr, void, void *, "d") |
| CK_PR_FAS(int, int, int, "w") |
| CK_PR_FAS(uint, unsigned int, unsigned int, "w") |
| |
| #undef CK_PR_FAS |
| |
| #define CK_PR_UNARY(O, N, M, T, I, W) \ |
| CK_CC_INLINE static void \ |
| ck_pr_##O##_##N(M *target) \ |
| { \ |
| T previous; \ |
| __asm__ __volatile__("1:" \ |
| "l" W "arx %0, 0, %1;" \ |
| I ";" \ |
| "st" W "cx. %0, 0, %1;" \ |
| "bne- 1b;" \ |
| : "=&r" (previous) \ |
| : "r" (target) \ |
| : "memory", "cc"); \ |
| return; \ |
| } |
| |
| CK_PR_UNARY(inc, ptr, void, void *, "addic %0, %0, 1", "d") |
| CK_PR_UNARY(dec, ptr, void, void *, "addic %0, %0, -1", "d") |
| CK_PR_UNARY(not, ptr, void, void *, "not %0, %0", "d") |
| CK_PR_UNARY(neg, ptr, void, void *, "neg %0, %0", "d") |
| |
| #define CK_PR_UNARY_S(S, T, W) \ |
| CK_PR_UNARY(inc, S, T, T, "addic %0, %0, 1", W) \ |
| CK_PR_UNARY(dec, S, T, T, "addic %0, %0, -1", W) \ |
| CK_PR_UNARY(not, S, T, T, "not %0, %0", W) \ |
| CK_PR_UNARY(neg, S, T, T, "neg %0, %0", W) |
| |
| CK_PR_UNARY_S(64, uint64_t, "d") |
| CK_PR_UNARY_S(32, uint32_t, "w") |
| CK_PR_UNARY_S(uint, unsigned int, "w") |
| CK_PR_UNARY_S(int, int, "w") |
| |
| #undef CK_PR_UNARY_S |
| #undef CK_PR_UNARY |
| |
| #define CK_PR_BINARY(O, N, M, T, I, W) \ |
| CK_CC_INLINE static void \ |
| ck_pr_##O##_##N(M *target, T delta) \ |
| { \ |
| T previous; \ |
| __asm__ __volatile__("1:" \ |
| "l" W "arx %0, 0, %1;" \ |
| I " %0, %2, %0;" \ |
| "st" W "cx. %0, 0, %1;" \ |
| "bne- 1b;" \ |
| : "=&r" (previous) \ |
| : "r" (target), \ |
| "r" (delta) \ |
| : "memory", "cc"); \ |
| return; \ |
| } |
| |
| CK_PR_BINARY(and, ptr, void, uintptr_t, "and", "d") |
| CK_PR_BINARY(add, ptr, void, uintptr_t, "add", "d") |
| CK_PR_BINARY(or, ptr, void, uintptr_t, "or", "d") |
| CK_PR_BINARY(sub, ptr, void, uintptr_t, "sub", "d") |
| CK_PR_BINARY(xor, ptr, void, uintptr_t, "xor", "d") |
| |
| #define CK_PR_BINARY_S(S, T, W) \ |
| CK_PR_BINARY(and, S, T, T, "and", W) \ |
| CK_PR_BINARY(add, S, T, T, "add", W) \ |
| CK_PR_BINARY(or, S, T, T, "or", W) \ |
| CK_PR_BINARY(sub, S, T, T, "subf", W) \ |
| CK_PR_BINARY(xor, S, T, T, "xor", W) |
| |
| CK_PR_BINARY_S(64, uint64_t, "d") |
| CK_PR_BINARY_S(32, uint32_t, "w") |
| CK_PR_BINARY_S(uint, unsigned int, "w") |
| CK_PR_BINARY_S(int, int, "w") |
| |
| #undef CK_PR_BINARY_S |
| #undef CK_PR_BINARY |
| |
| CK_CC_INLINE static void * |
| ck_pr_faa_ptr(void *target, uintptr_t delta) |
| { |
| uintptr_t previous, r; |
| |
| __asm__ __volatile__("1:" |
| "ldarx %0, 0, %2;" |
| "add %1, %3, %0;" |
| "stdcx. %1, 0, %2;" |
| "bne- 1b;" |
| : "=&r" (previous), |
| "=&r" (r) |
| : "r" (target), |
| "r" (delta) |
| : "memory", "cc"); |
| |
| return (void *)(previous); |
| } |
| |
| #define CK_PR_FAA(S, T, W) \ |
| CK_CC_INLINE static T \ |
| ck_pr_faa_##S(T *target, T delta) \ |
| { \ |
| T previous, r; \ |
| __asm__ __volatile__("1:" \ |
| "l" W "arx %0, 0, %2;" \ |
| "add %1, %3, %0;" \ |
| "st" W "cx. %1, 0, %2;" \ |
| "bne- 1b;" \ |
| : "=&r" (previous), \ |
| "=&r" (r) \ |
| : "r" (target), \ |
| "r" (delta) \ |
| : "memory", "cc"); \ |
| return (previous); \ |
| } |
| |
| CK_PR_FAA(64, uint64_t, "d") |
| CK_PR_FAA(32, uint32_t, "w") |
| CK_PR_FAA(uint, unsigned int, "w") |
| CK_PR_FAA(int, int, "w") |
| |
| #undef CK_PR_FAA |
| |
| #endif /* CK_PR_PPC64_H */ |
