Merge branch 'WIP.x86/asm' into x86/urgent, because the topic is ready

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 0 insertions, 367 deletions

diff --git a/arch/tile/lib/memcpy_64.c b/arch/tile/lib/memcpy_64.c
deleted file mode 100644
index 4815354b8cd2..000000000000
--- a/arch/tile/lib/memcpy_64.c
+++ /dev/null
@@ -1,367 +0,0 @@
-/*
- * Copyright 2011 Tilera Corporation. All Rights Reserved.
- *
- *   This program is free software; you can redistribute it and/or
- *   modify it under the terms of the GNU General Public License
- *   as published by the Free Software Foundation, version 2.
- *
- *   This program is distributed in the hope that it will be useful, but
- *   WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- *   NON INFRINGEMENT.  See the GNU General Public License for
- *   more details.
- */
-
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/module.h>
-/* EXPORT_SYMBOL() is in arch/tile/lib/exports.c since this should be asm. */
-
-/* Must be 8 bytes in size. */
-#define op_t uint64_t
-
-/* Threshold value for when to enter the unrolled loops. */
-#define	OP_T_THRES	16
-
-#if CHIP_L2_LINE_SIZE() != 64
-#error "Assumes 64 byte line size"
-#endif
-
-/* How many cache lines ahead should we prefetch? */
-#define PREFETCH_LINES_AHEAD 4
-
-/*
- * Provide "base versions" of load and store for the normal code path.
- * The kernel provides other versions for userspace copies.
- */
-#define ST(p, v) (*(p) = (v))
-#define LD(p) (*(p))
-
-#ifndef USERCOPY_FUNC
-#define ST1 ST
-#define ST2 ST
-#define ST4 ST
-#define ST8 ST
-#define LD1 LD
-#define LD2 LD
-#define LD4 LD
-#define LD8 LD
-#define RETVAL dstv
-void *memcpy(void *__restrict dstv, const void *__restrict srcv, size_t n)
-#else
-/*
- * Special kernel version will provide implementation of the LDn/STn
- * macros to return a count of uncopied bytes due to mm fault.
- */
-#define RETVAL 0
-int __attribute__((optimize("omit-frame-pointer")))
-USERCOPY_FUNC(void *__restrict dstv, const void *__restrict srcv, size_t n)
-#endif
-{
-	char *__restrict dst1 = (char *)dstv;
-	const char *__restrict src1 = (const char *)srcv;
-	const char *__restrict src1_end;
-	const char *__restrict prefetch;
-	op_t *__restrict dst8;    /* 8-byte pointer to destination memory. */
-	op_t final; /* Final bytes to write to trailing word, if any */
-	long i;
-
-	if (n < 16) {
-		for (; n; n--)
-			ST1(dst1++, LD1(src1++));
-		return RETVAL;
-	}
-
-	/*
-	 * Locate the end of source memory we will copy.  Don't
-	 * prefetch past this.
-	 */
-	src1_end = src1 + n - 1;
-
-	/* Prefetch ahead a few cache lines, but not past the end. */
-	prefetch = src1;
-	for (i = 0; i < PREFETCH_LINES_AHEAD; i++) {
-		__insn_prefetch(prefetch);
-		prefetch += CHIP_L2_LINE_SIZE();
-		prefetch = (prefetch < src1_end) ? prefetch : src1;
-	}
-
-	/* Copy bytes until dst is word-aligned. */
-	for (; (uintptr_t)dst1 & (sizeof(op_t) - 1); n--)
-		ST1(dst1++, LD1(src1++));
-
-	/* 8-byte pointer to destination memory. */
-	dst8 = (op_t *)dst1;
-
-	if (__builtin_expect((uintptr_t)src1 & (sizeof(op_t) - 1), 0)) {
-		/* Unaligned copy. */
-
-		op_t  tmp0 = 0, tmp1 = 0, tmp2, tmp3;
-		const op_t *src8 = (const op_t *) ((uintptr_t)src1 &
-						   -sizeof(op_t));
-		const void *srci = (void *)src1;
-		int m;
-
-		m = (CHIP_L2_LINE_SIZE() << 2) -
-			(((uintptr_t)dst8) & ((CHIP_L2_LINE_SIZE() << 2) - 1));
-		m = (n < m) ? n : m;
-		m /= sizeof(op_t);
-
-		/* Copy until 'dst' is cache-line-aligned. */
-		n -= (sizeof(op_t) * m);
-
-		switch (m % 4) {
-		case 0:
-			if (__builtin_expect(!m, 0))
-				goto _M0;
-			tmp1 = LD8(src8++);
-			tmp2 = LD8(src8++);
-			goto _8B3;
-		case 2:
-			m += 2;
-			tmp3 = LD8(src8++);
-			tmp0 = LD8(src8++);
-			goto _8B1;
-		case 3:
-			m += 1;
-			tmp2 = LD8(src8++);
-			tmp3 = LD8(src8++);
-			goto _8B2;
-		case 1:
-			m--;
-			tmp0 = LD8(src8++);
-			tmp1 = LD8(src8++);
-			if (__builtin_expect(!m, 0))
-				goto _8B0;
-		}
-
-		do {
-			tmp2 = LD8(src8++);
-			tmp0 =  __insn_dblalign(tmp0, tmp1, srci);
-			ST8(dst8++, tmp0);
-_8B3:
-			tmp3 = LD8(src8++);
-			tmp1 = __insn_dblalign(tmp1, tmp2, srci);
-			ST8(dst8++, tmp1);
-_8B2:
-			tmp0 = LD8(src8++);
-			tmp2 = __insn_dblalign(tmp2, tmp3, srci);
-			ST8(dst8++, tmp2);
-_8B1:
-			tmp1 = LD8(src8++);
-			tmp3 = __insn_dblalign(tmp3, tmp0, srci);
-			ST8(dst8++, tmp3);
-			m -= 4;
-		} while (m);
-
-_8B0:
-		tmp0 = __insn_dblalign(tmp0, tmp1, srci);
-		ST8(dst8++, tmp0);
-		src8--;
-
-_M0:
-		if (__builtin_expect(n >= CHIP_L2_LINE_SIZE(), 0)) {
-			op_t tmp4, tmp5, tmp6, tmp7, tmp8;
-
-			prefetch = ((const char *)src8) +
-				CHIP_L2_LINE_SIZE() * PREFETCH_LINES_AHEAD;
-
-			for (tmp0 = LD8(src8++); n >= CHIP_L2_LINE_SIZE();
-			     n -= CHIP_L2_LINE_SIZE()) {
-				/* Prefetch and advance to next line to
-				   prefetch, but don't go past the end.  */
-				__insn_prefetch(prefetch);
-
-				/* Make sure prefetch got scheduled
-				   earlier.  */
-				__asm__ ("" : : : "memory");
-
-				prefetch += CHIP_L2_LINE_SIZE();
-				prefetch = (prefetch < src1_end) ? prefetch :
-					(const char *) src8;
-
-				tmp1 = LD8(src8++);
-				tmp2 = LD8(src8++);
-				tmp3 = LD8(src8++);
-				tmp4 = LD8(src8++);
-				tmp5 = LD8(src8++);
-				tmp6 = LD8(src8++);
-				tmp7 = LD8(src8++);
-				tmp8 = LD8(src8++);
-
-				tmp0 = __insn_dblalign(tmp0, tmp1, srci);
-				tmp1 = __insn_dblalign(tmp1, tmp2, srci);
-				tmp2 = __insn_dblalign(tmp2, tmp3, srci);
-				tmp3 = __insn_dblalign(tmp3, tmp4, srci);
-				tmp4 = __insn_dblalign(tmp4, tmp5, srci);
-				tmp5 = __insn_dblalign(tmp5, tmp6, srci);
-				tmp6 = __insn_dblalign(tmp6, tmp7, srci);
-				tmp7 = __insn_dblalign(tmp7, tmp8, srci);
-
-				__insn_wh64(dst8);
-
-				ST8(dst8++, tmp0);
-				ST8(dst8++, tmp1);
-				ST8(dst8++, tmp2);
-				ST8(dst8++, tmp3);
-				ST8(dst8++, tmp4);
-				ST8(dst8++, tmp5);
-				ST8(dst8++, tmp6);
-				ST8(dst8++, tmp7);
-
-				tmp0 = tmp8;
-			}
-			src8--;
-		}
-
-		/* Copy the rest 8-byte chunks. */
-		if (n >= sizeof(op_t)) {
-			tmp0 = LD8(src8++);
-			for (; n >= sizeof(op_t); n -= sizeof(op_t)) {
-				tmp1 = LD8(src8++);
-				tmp0 = __insn_dblalign(tmp0, tmp1, srci);
-				ST8(dst8++, tmp0);
-				tmp0 = tmp1;
-			}
-			src8--;
-		}
-
-		if (n == 0)
-			return RETVAL;
-
-		tmp0 = LD8(src8++);
-		tmp1 = ((const char *)src8 <= src1_end)
-			? LD8((op_t *)src8) : 0;
-		final = __insn_dblalign(tmp0, tmp1, srci);
-
-	} else {
-		/* Aligned copy. */
-
-		const op_t *__restrict src8 = (const op_t *)src1;
-
-		/* src8 and dst8 are both word-aligned. */
-		if (n >= CHIP_L2_LINE_SIZE()) {
-			/* Copy until 'dst' is cache-line-aligned. */
-			for (; (uintptr_t)dst8 & (CHIP_L2_LINE_SIZE() - 1);
-			     n -= sizeof(op_t))
-				ST8(dst8++, LD8(src8++));
-
-			for (; n >= CHIP_L2_LINE_SIZE(); ) {
-				op_t tmp0, tmp1, tmp2, tmp3;
-				op_t tmp4, tmp5, tmp6, tmp7;
-
-				/*
-				 * Prefetch and advance to next line
-				 * to prefetch, but don't go past the
-				 * end.
-				 */
-				__insn_prefetch(prefetch);
-
-				/* Make sure prefetch got scheduled
-				   earlier.  */
-				__asm__ ("" : : : "memory");
-
-				prefetch += CHIP_L2_LINE_SIZE();
-				prefetch = (prefetch < src1_end) ? prefetch :
-					(const char *)src8;
-
-				/*
-				 * Do all the loads before wh64.  This
-				 * is necessary if [src8, src8+7] and
-				 * [dst8, dst8+7] share the same cache
-				 * line and dst8 <= src8, as can be
-				 * the case when called from memmove,
-				 * or with code tested on x86 whose
-				 * memcpy always works with forward
-				 * copies.
-				 */
-				tmp0 = LD8(src8++);
-				tmp1 = LD8(src8++);
-				tmp2 = LD8(src8++);
-				tmp3 = LD8(src8++);
-				tmp4 = LD8(src8++);
-				tmp5 = LD8(src8++);
-				tmp6 = LD8(src8++);
-				tmp7 = LD8(src8++);
-
-				/* wh64 and wait for tmp7 load completion. */
-				__asm__ ("move %0, %0; wh64 %1\n"
-					 : : "r"(tmp7), "r"(dst8));
-
-				ST8(dst8++, tmp0);
-				ST8(dst8++, tmp1);
-				ST8(dst8++, tmp2);
-				ST8(dst8++, tmp3);
-				ST8(dst8++, tmp4);
-				ST8(dst8++, tmp5);
-				ST8(dst8++, tmp6);
-				ST8(dst8++, tmp7);
-
-				n -= CHIP_L2_LINE_SIZE();
-			}
-#if CHIP_L2_LINE_SIZE() != 64
-# error "Fix code that assumes particular L2 cache line size."
-#endif
-		}
-
-		for (; n >= sizeof(op_t); n -= sizeof(op_t))
-			ST8(dst8++, LD8(src8++));
-
-		if (__builtin_expect(n == 0, 1))
-			return RETVAL;
-
-		final = LD8(src8);
-	}
-
-	/* n != 0 if we get here.  Write out any trailing bytes. */
-	dst1 = (char *)dst8;
-#ifndef __BIG_ENDIAN__
-	if (n & 4) {
-		ST4((uint32_t *)dst1, final);
-		dst1 += 4;
-		final >>= 32;
-		n &= 3;
-	}
-	if (n & 2) {
-		ST2((uint16_t *)dst1, final);
-		dst1 += 2;
-		final >>= 16;
-		n &= 1;
-	}
-	if (n)
-		ST1((uint8_t *)dst1, final);
-#else
-	if (n & 4) {
-		ST4((uint32_t *)dst1, final >> 32);
-		dst1 += 4;
-        }
-        else
-        {
-		final >>= 32;
-        }
-	if (n & 2) {
-		ST2((uint16_t *)dst1, final >> 16);
-		dst1 += 2;
-        }
-        else
-        {
-		final >>= 16;
-        }
-	if (n & 1)
-		ST1((uint8_t *)dst1, final >> 8);
-#endif
-
-	return RETVAL;
-}
-
-#ifdef USERCOPY_FUNC
-#undef ST1
-#undef ST2
-#undef ST4
-#undef ST8
-#undef LD1
-#undef LD2
-#undef LD4
-#undef LD8
-#undef USERCOPY_FUNC
-#endif