Import CK as of 21d3e319407d19dece16ee317c757ffc54a452bc, which makes its
sparcv9 atomics compatible with the FreeBSD kernel by using instructions which access the appropriate address space. Atomic operations within the kernel must access the nucleus address space instead of the default primary one. Without this change but the increased use of CK in the kernel, machines started to panic after some minutes of uptime due to an unresolvable fault in ck_pr_cas_64_value().
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@ -136,11 +136,26 @@ CK_PR_STORE_S(int, int, "stsw")
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#undef CK_PR_STORE_S
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#undef CK_PR_STORE
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/* Use the appropriate address space for atomics within the FreeBSD kernel. */
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#if defined(__FreeBSD__) && defined(_KERNEL)
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#include <sys/cdefs.h>
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#include <machine/atomic.h>
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#define CK_PR_INS_CAS "casa"
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#define CK_PR_INS_CASX "casxa"
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#define CK_PR_INS_SWAP "swapa"
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#define CK_PR_ASI_ATOMIC __XSTRING(__ASI_ATOMIC)
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#else
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#define CK_PR_INS_CAS "cas"
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#define CK_PR_INS_CASX "casx"
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#define CK_PR_INS_SWAP "swap"
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#define CK_PR_ASI_ATOMIC ""
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#endif
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CK_CC_INLINE static bool
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ck_pr_cas_64_value(uint64_t *target, uint64_t compare, uint64_t set, uint64_t *value)
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{
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__asm__ __volatile__("casx [%1], %2, %0"
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__asm__ __volatile__(CK_PR_INS_CASX " [%1] " CK_PR_ASI_ATOMIC ", %2, %0"
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: "+&r" (set)
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: "r" (target),
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"r" (compare)
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@ -154,7 +169,7 @@ CK_CC_INLINE static bool
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ck_pr_cas_64(uint64_t *target, uint64_t compare, uint64_t set)
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{
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__asm__ __volatile__("casx [%1], %2, %0"
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__asm__ __volatile__(CK_PR_INS_CASX " [%1] " CK_PR_ASI_ATOMIC ", %2, %0"
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: "+&r" (set)
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: "r" (target),
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"r" (compare)
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@ -181,7 +196,7 @@ ck_pr_cas_ptr_value(void *target, void *compare, void *set, void *previous)
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CK_CC_INLINE static bool \
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ck_pr_cas_##N##_value(T *target, T compare, T set, T *value) \
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{ \
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__asm__ __volatile__("cas [%1], %2, %0" \
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__asm__ __volatile__(CK_PR_INS_CAS " [%1] " CK_PR_ASI_ATOMIC ", %2, %0" \
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: "+&r" (set) \
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: "r" (target), \
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"r" (compare) \
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@ -192,7 +207,7 @@ ck_pr_cas_ptr_value(void *target, void *compare, void *set, void *previous)
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CK_CC_INLINE static bool \
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ck_pr_cas_##N(T *target, T compare, T set) \
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{ \
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__asm__ __volatile__("cas [%1], %2, %0" \
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__asm__ __volatile__(CK_PR_INS_CAS " [%1] " CK_PR_ASI_ATOMIC ", %2, %0" \
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: "+&r" (set) \
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: "r" (target), \
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"r" (compare) \
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@ -211,7 +226,7 @@ CK_PR_CAS(int, int)
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ck_pr_fas_##N(T *target, T update) \
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{ \
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\
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__asm__ __volatile__("swap [%1], %0" \
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__asm__ __volatile__(CK_PR_INS_SWAP " [%1] " CK_PR_ASI_ATOMIC ", %0" \
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: "+&r" (update) \
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: "r" (target) \
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: "memory"); \
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@ -224,5 +239,10 @@ CK_PR_FAS(32, uint32_t)
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#undef CK_PR_FAS
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#undef CK_PR_INS_CAS
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#undef CK_PR_INS_CASX
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#undef CK_PR_INS_SWAP
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#undef CK_PR_ASI_ATOMIC
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#endif /* CK_PR_SPARCV9_H */
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