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https://github.com/torvalds/linux
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00460f41ff
Implement atomic64_t and its ops for FRV. Tested with the following patch:
diff --git a/arch/frv/kernel/setup.c b/arch/frv/kernel/setup.c
index 55e4fab..086d50d 100644
--- a/arch/frv/kernel/setup.c
+++ b/arch/frv/kernel/setup.c
@@ -746,6 +746,52 @@ static void __init parse_cmdline_early(char *cmdline)
} /* end parse_cmdline_early() */
+static atomic64_t xxx;
+
+static void test_atomic64(void)
+{
+ atomic64_set(&xxx, 0x12300000023LL);
+
+ mb();
+ BUG_ON(atomic64_read(&xxx) != 0x12300000023LL);
+ mb();
+ if (atomic64_inc_return(&xxx) != 0x12300000024LL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != 0x12300000024LL);
+ mb();
+ if (atomic64_sub_return(0x36900000050LL, &xxx) != -0x2460000002cLL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != -0x2460000002cLL);
+ mb();
+ if (atomic64_dec_return(&xxx) != -0x2460000002dLL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != -0x2460000002dLL);
+ mb();
+ if (atomic64_add_return(0x36800000001LL, &xxx) != 0x121ffffffd4LL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != 0x121ffffffd4LL);
+ mb();
+ if (atomic64_cmpxchg(&xxx, 0x123456789abcdefLL, 0x121ffffffd4LL) != 0x121ffffffd4LL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != 0x121ffffffd4LL);
+ mb();
+ if (atomic64_cmpxchg(&xxx, 0x121ffffffd4LL, 0x123456789abcdefLL) != 0x121ffffffd4LL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != 0x123456789abcdefLL);
+ mb();
+ if (atomic64_xchg(&xxx, 0xabcdef123456789LL) != 0x123456789abcdefLL)
+ BUG();
+ mb();
+ BUG_ON(atomic64_read(&xxx) != 0xabcdef123456789LL);
+ mb();
+}
+
/*****************************************************************************/
/*
*
@@ -845,6 +891,8 @@ void __init setup_arch(char **cmdline_p)
// asm volatile("movgs %0,timerd" :: "r"(10000000));
// __set_HSR(0, __get_HSR(0) | HSR0_ETMD);
+ test_atomic64();
+
} /* end setup_arch() */
#if 0
Note that this doesn't cover all the trivial wrappers, but does cover all the
substantial implementations.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
114 lines
3 KiB
C
114 lines
3 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(kernel_thread);
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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(atomic_test_and_ANDNOT_mask);
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EXPORT_SYMBOL(atomic_test_and_OR_mask);
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EXPORT_SYMBOL(atomic_test_and_XOR_mask);
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EXPORT_SYMBOL(atomic_add_return);
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EXPORT_SYMBOL(atomic_sub_return);
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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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