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b1d6b40cbd
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
134 lines
4.4 KiB
C
134 lines
4.4 KiB
C
#ifndef __ARCH_S390_PERCPU__
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#define __ARCH_S390_PERCPU__
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#include <linux/preempt.h>
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#include <asm/cmpxchg.h>
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/*
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* s390 uses its own implementation for per cpu data, the offset of
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* the cpu local data area is cached in the cpu's lowcore memory.
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*/
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#define __my_cpu_offset S390_lowcore.percpu_offset
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/*
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* For 64 bit module code, the module may be more than 4G above the
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* per cpu area, use weak definitions to force the compiler to
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* generate external references.
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*/
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#if defined(CONFIG_SMP) && defined(CONFIG_64BIT) && defined(MODULE)
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#define ARCH_NEEDS_WEAK_PER_CPU
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#endif
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#define arch_this_cpu_to_op(pcp, val, op) \
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({ \
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typedef typeof(pcp) pcp_op_T__; \
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pcp_op_T__ old__, new__, prev__; \
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pcp_op_T__ *ptr__; \
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preempt_disable(); \
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ptr__ = __this_cpu_ptr(&(pcp)); \
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prev__ = *ptr__; \
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do { \
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old__ = prev__; \
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new__ = old__ op (val); \
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switch (sizeof(*ptr__)) { \
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case 8: \
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prev__ = cmpxchg64(ptr__, old__, new__); \
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break; \
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default: \
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prev__ = cmpxchg(ptr__, old__, new__); \
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} \
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} while (prev__ != old__); \
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preempt_enable(); \
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new__; \
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})
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#define this_cpu_add_1(pcp, val) arch_this_cpu_to_op(pcp, val, +)
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#define this_cpu_add_2(pcp, val) arch_this_cpu_to_op(pcp, val, +)
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#define this_cpu_add_4(pcp, val) arch_this_cpu_to_op(pcp, val, +)
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#define this_cpu_add_8(pcp, val) arch_this_cpu_to_op(pcp, val, +)
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#define this_cpu_add_return_1(pcp, val) arch_this_cpu_to_op(pcp, val, +)
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#define this_cpu_add_return_2(pcp, val) arch_this_cpu_to_op(pcp, val, +)
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#define this_cpu_add_return_4(pcp, val) arch_this_cpu_to_op(pcp, val, +)
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#define this_cpu_add_return_8(pcp, val) arch_this_cpu_to_op(pcp, val, +)
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#define this_cpu_and_1(pcp, val) arch_this_cpu_to_op(pcp, val, &)
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#define this_cpu_and_2(pcp, val) arch_this_cpu_to_op(pcp, val, &)
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#define this_cpu_and_4(pcp, val) arch_this_cpu_to_op(pcp, val, &)
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#define this_cpu_and_8(pcp, val) arch_this_cpu_to_op(pcp, val, &)
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#define this_cpu_or_1(pcp, val) arch_this_cpu_to_op(pcp, val, |)
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#define this_cpu_or_2(pcp, val) arch_this_cpu_to_op(pcp, val, |)
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#define this_cpu_or_4(pcp, val) arch_this_cpu_to_op(pcp, val, |)
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#define this_cpu_or_8(pcp, val) arch_this_cpu_to_op(pcp, val, |)
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#define this_cpu_xor_1(pcp, val) arch_this_cpu_to_op(pcp, val, ^)
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#define this_cpu_xor_2(pcp, val) arch_this_cpu_to_op(pcp, val, ^)
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#define this_cpu_xor_4(pcp, val) arch_this_cpu_to_op(pcp, val, ^)
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#define this_cpu_xor_8(pcp, val) arch_this_cpu_to_op(pcp, val, ^)
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#define arch_this_cpu_cmpxchg(pcp, oval, nval) \
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({ \
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typedef typeof(pcp) pcp_op_T__; \
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pcp_op_T__ ret__; \
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pcp_op_T__ *ptr__; \
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preempt_disable(); \
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ptr__ = __this_cpu_ptr(&(pcp)); \
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switch (sizeof(*ptr__)) { \
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case 8: \
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ret__ = cmpxchg64(ptr__, oval, nval); \
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break; \
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default: \
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ret__ = cmpxchg(ptr__, oval, nval); \
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} \
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preempt_enable(); \
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ret__; \
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})
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#define this_cpu_cmpxchg_1(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
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#define this_cpu_cmpxchg_2(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
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#define this_cpu_cmpxchg_4(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
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#define this_cpu_cmpxchg_8(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
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#define arch_this_cpu_xchg(pcp, nval) \
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({ \
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typeof(pcp) *ptr__; \
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typeof(pcp) ret__; \
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preempt_disable(); \
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ptr__ = __this_cpu_ptr(&(pcp)); \
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ret__ = xchg(ptr__, nval); \
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preempt_enable(); \
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ret__; \
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})
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#define this_cpu_xchg_1(pcp, nval) arch_this_cpu_xchg(pcp, nval)
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#define this_cpu_xchg_2(pcp, nval) arch_this_cpu_xchg(pcp, nval)
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#define this_cpu_xchg_4(pcp, nval) arch_this_cpu_xchg(pcp, nval)
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#ifdef CONFIG_64BIT
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#define this_cpu_xchg_8(pcp, nval) arch_this_cpu_xchg(pcp, nval)
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#endif
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#define arch_this_cpu_cmpxchg_double(pcp1, pcp2, o1, o2, n1, n2) \
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({ \
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typeof(pcp1) o1__ = (o1), n1__ = (n1); \
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typeof(pcp2) o2__ = (o2), n2__ = (n2); \
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typeof(pcp1) *p1__; \
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typeof(pcp2) *p2__; \
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int ret__; \
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preempt_disable(); \
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p1__ = __this_cpu_ptr(&(pcp1)); \
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p2__ = __this_cpu_ptr(&(pcp2)); \
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ret__ = __cmpxchg_double(p1__, p2__, o1__, o2__, n1__, n2__); \
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preempt_enable(); \
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ret__; \
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})
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#define this_cpu_cmpxchg_double_4 arch_this_cpu_cmpxchg_double
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#ifdef CONFIG_64BIT
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#define this_cpu_cmpxchg_double_8 arch_this_cpu_cmpxchg_double
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#endif
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#include <asm-generic/percpu.h>
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#endif /* __ARCH_S390_PERCPU__ */
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