b0d8003ef4
Mostly complete rewrite of the FRV atomic implementation, instead of
using assembly files, use inline assembler.
The out-of-line CONFIG option makes a bit of a mess of things, but a
little CPP trickery gets that done too.
FRV already had the atomic logic ops but under a non standard name,
the reimplementation provides the generic names and provides the
intermediate form required for the bitops implementation.
The slightly inconsistent __atomic32_fetch_##op naming is because
__atomic_fetch_##op conlicts with GCC builtin functions.
The 64bit atomic ops use the inline assembly %Ln construct to access
the low word register (r+1), afaik this construct was not previously
used in the kernel and is completely undocumented, but I found it in
the FRV GCC code and it seems to work.
FRV had a non-standard definition of atomic_{clear,set}_mask() which
would work types other than atomic_t, the one user relying on that
(arch/frv/kernel/dma.c) got converted to use the new intermediate
form.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
#include <linux/module.h>
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#include <linux/linkage.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/user.h>
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#include <linux/elfcore.h>
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#include <linux/in6.h>
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#include <linux/interrupt.h>
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#include <asm/setup.h>
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#include <asm/pgalloc.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <asm/checksum.h>
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#include <asm/hardirq.h>
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#include <asm/cacheflush.h>
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extern long __memcpy_user(void *dst, const void *src, size_t count);
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extern long __memset_user(void *dst, const void *src, size_t count);
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/* platform dependent support */
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EXPORT_SYMBOL(__ioremap);
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EXPORT_SYMBOL(iounmap);
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EXPORT_SYMBOL(ip_fast_csum);
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#if 0
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EXPORT_SYMBOL(local_irq_count);
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EXPORT_SYMBOL(local_bh_count);
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#endif
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EXPORT_SYMBOL(__res_bus_clock_speed_HZ);
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EXPORT_SYMBOL(__page_offset);
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EXPORT_SYMBOL(__memcpy_user);
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EXPORT_SYMBOL(__memset_user);
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EXPORT_SYMBOL(frv_dcache_writeback);
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EXPORT_SYMBOL(frv_cache_invalidate);
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EXPORT_SYMBOL(frv_icache_invalidate);
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EXPORT_SYMBOL(frv_cache_wback_inv);
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#ifndef CONFIG_MMU
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EXPORT_SYMBOL(memory_start);
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EXPORT_SYMBOL(memory_end);
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#endif
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EXPORT_SYMBOL(__debug_bug_trap);
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/* The following are special because they're not called
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explicitly (the C compiler generates them). Fortunately,
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their interface isn't gonna change any time soon now, so
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it's OK to leave it out of version control. */
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EXPORT_SYMBOL(memcpy);
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EXPORT_SYMBOL(memset);
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EXPORT_SYMBOL(__outsl_ns);
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EXPORT_SYMBOL(__insl_ns);
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#ifdef CONFIG_FRV_OUTOFLINE_ATOMIC_OPS
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EXPORT_SYMBOL(__xchg_32);
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EXPORT_SYMBOL(__cmpxchg_32);
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#endif
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EXPORT_SYMBOL(atomic64_add_return);
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EXPORT_SYMBOL(atomic64_sub_return);
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EXPORT_SYMBOL(__xchg_64);
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EXPORT_SYMBOL(__cmpxchg_64);
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EXPORT_SYMBOL(__debug_bug_printk);
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EXPORT_SYMBOL(__delay_loops_MHz);
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/*
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* libgcc functions - functions that are used internally by the
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* compiler... (prototypes are not correct though, but that
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* doesn't really matter since they're not versioned).
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*/
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extern void __gcc_bcmp(void);
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extern void __ashldi3(void);
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extern void __ashrdi3(void);
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extern void __cmpdi2(void);
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extern void __divdi3(void);
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extern void __lshrdi3(void);
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extern void __moddi3(void);
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extern void __muldi3(void);
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extern void __mulll(void);
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extern void __umulll(void);
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extern void __negdi2(void);
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extern void __ucmpdi2(void);
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extern void __udivdi3(void);
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extern void __udivmoddi4(void);
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extern void __umoddi3(void);
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/* gcc lib functions */
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//EXPORT_SYMBOL(__gcc_bcmp);
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EXPORT_SYMBOL(__ashldi3);
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EXPORT_SYMBOL(__ashrdi3);
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//EXPORT_SYMBOL(__cmpdi2);
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//EXPORT_SYMBOL(__divdi3);
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EXPORT_SYMBOL(__lshrdi3);
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//EXPORT_SYMBOL(__moddi3);
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EXPORT_SYMBOL(__muldi3);
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EXPORT_SYMBOL(__mulll);
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EXPORT_SYMBOL(__umulll);
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EXPORT_SYMBOL(__negdi2);
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EXPORT_SYMBOL(__ucmpdi2);
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//EXPORT_SYMBOL(__udivdi3);
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//EXPORT_SYMBOL(__udivmoddi4);
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//EXPORT_SYMBOL(__umoddi3);
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