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arch/tile: use extended assembly to inline __mb_incoherent()

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This avoids having to maintain an additional separate assembly
file, and of course the inline is slightly more efficient as well.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf
2011-02-28 15:28:00 -05:00
parent 0b989cac90
commit 6c4d112688
4 changed files with 20 additions and 41 deletions
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19
arch/tile/include/asm/system.h
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@ -90,7 +90,24 @@
#endif
#if !CHIP_HAS_MF_WAITS_FOR_VICTIMS()
int __mb_incoherent(void); /* Helper routine for mb_incoherent(). */
#include <hv/syscall_public.h>
/*
* Issue an uncacheable load to each memory controller, then
* wait until those loads have completed.
*/
static inline void __mb_incoherent(void)
{
long clobber_r10;
asm volatile("swint2"
: "=R10" (clobber_r10)
: "R10" (HV_SYS_fence_incoherent)
: "r0", "r1", "r2", "r3", "r4",
"r5", "r6", "r7", "r8", "r9",
"r11", "r12", "r13", "r14",
"r15", "r16", "r17", "r18", "r19",
"r20", "r21", "r22", "r23", "r24",
"r25", "r26", "r27", "r28", "r29");
}
#endif
/* Fence to guarantee visibility of stores to incoherent memory. */