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-rw-r--r--arch/x86/lib/mmx_32.c388
1 files changed, 0 insertions, 388 deletions
diff --git a/arch/x86/lib/mmx_32.c b/arch/x86/lib/mmx_32.c
index cc5f4ea943d3..e69de29bb2d1 100644
--- a/arch/x86/lib/mmx_32.c
+++ b/arch/x86/lib/mmx_32.c
@@ -1,388 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- *	MMX 3DNow! library helper functions
- *
- *	To do:
- *	We can use MMX just for prefetch in IRQ's. This may be a win.
- *		(reported so on K6-III)
- *	We should use a better code neutral filler for the short jump
- *		leal ebx. [ebx] is apparently best for K6-2, but Cyrix ??
- *	We also want to clobber the filler register so we don't get any
- *		register forwarding stalls on the filler.
- *
- *	Add *user handling. Checksums are not a win with MMX on any CPU
- *	tested so far for any MMX solution figured.
- *
- *	22/09/2000 - Arjan van de Ven
- *		Improved for non-engineering-sample Athlons
- *
- */
-#include <linux/hardirq.h>
-#include <linux/string.h>
-#include <linux/export.h>
-#include <linux/sched.h>
-#include <linux/types.h>
-
-#include <asm/fpu/api.h>
-#include <asm/asm.h>
-
-/*
- * Use KFPU_387.  MMX instructions are not affected by MXCSR,
- * but both AMD and Intel documentation states that even integer MMX
- * operations will result in #MF if an exception is pending in FCW.
- *
- * EMMS is not needed afterwards because, after calling kernel_fpu_end(),
- * any subsequent user of the 387 stack will reinitialize it using
- * KFPU_387.
- */
-
-void *_mmx_memcpy(void *to, const void *from, size_t len)
-{
-	void *p;
-	int i;
-
-	if (unlikely(in_interrupt()))
-		return __memcpy(to, from, len);
-
-	p = to;
-	i = len >> 6; /* len/64 */
-
-	kernel_fpu_begin_mask(KFPU_387);
-
-	__asm__ __volatile__ (
-		"1: prefetch (%0)\n"		/* This set is 28 bytes */
-		"   prefetch 64(%0)\n"
-		"   prefetch 128(%0)\n"
-		"   prefetch 192(%0)\n"
-		"   prefetch 256(%0)\n"
-		"2:  \n"
-		".section .fixup, \"ax\"\n"
-		"3: movw $0x1AEB, 1b\n"	/* jmp on 26 bytes */
-		"   jmp 2b\n"
-		".previous\n"
-			_ASM_EXTABLE(1b, 3b)
-			: : "r" (from));
-
-	for ( ; i > 5; i--) {
-		__asm__ __volatile__ (
-		"1:  prefetch 320(%0)\n"
-		"2:  movq (%0), %%mm0\n"
-		"  movq 8(%0), %%mm1\n"
-		"  movq 16(%0), %%mm2\n"
-		"  movq 24(%0), %%mm3\n"
-		"  movq %%mm0, (%1)\n"
-		"  movq %%mm1, 8(%1)\n"
-		"  movq %%mm2, 16(%1)\n"
-		"  movq %%mm3, 24(%1)\n"
-		"  movq 32(%0), %%mm0\n"
-		"  movq 40(%0), %%mm1\n"
-		"  movq 48(%0), %%mm2\n"
-		"  movq 56(%0), %%mm3\n"
-		"  movq %%mm0, 32(%1)\n"
-		"  movq %%mm1, 40(%1)\n"
-		"  movq %%mm2, 48(%1)\n"
-		"  movq %%mm3, 56(%1)\n"
-		".section .fixup, \"ax\"\n"
-		"3: movw $0x05EB, 1b\n"	/* jmp on 5 bytes */
-		"   jmp 2b\n"
-		".previous\n"
-			_ASM_EXTABLE(1b, 3b)
-			: : "r" (from), "r" (to) : "memory");
-
-		from += 64;
-		to += 64;
-	}
-
-	for ( ; i > 0; i--) {
-		__asm__ __volatile__ (
-		"  movq (%0), %%mm0\n"
-		"  movq 8(%0), %%mm1\n"
-		"  movq 16(%0), %%mm2\n"
-		"  movq 24(%0), %%mm3\n"
-		"  movq %%mm0, (%1)\n"
-		"  movq %%mm1, 8(%1)\n"
-		"  movq %%mm2, 16(%1)\n"
-		"  movq %%mm3, 24(%1)\n"
-		"  movq 32(%0), %%mm0\n"
-		"  movq 40(%0), %%mm1\n"
-		"  movq 48(%0), %%mm2\n"
-		"  movq 56(%0), %%mm3\n"
-		"  movq %%mm0, 32(%1)\n"
-		"  movq %%mm1, 40(%1)\n"
-		"  movq %%mm2, 48(%1)\n"
-		"  movq %%mm3, 56(%1)\n"
-			: : "r" (from), "r" (to) : "memory");
-
-		from += 64;
-		to += 64;
-	}
-	/*
-	 * Now do the tail of the block:
-	 */
-	__memcpy(to, from, len & 63);
-	kernel_fpu_end();
-
-	return p;
-}
-EXPORT_SYMBOL(_mmx_memcpy);
-
-#ifdef CONFIG_MK7
-
-/*
- *	The K7 has streaming cache bypass load/store. The Cyrix III, K6 and
- *	other MMX using processors do not.
- */
-
-static void fast_clear_page(void *page)
-{
-	int i;
-
-	kernel_fpu_begin_mask(KFPU_387);
-
-	__asm__ __volatile__ (
-		"  pxor %%mm0, %%mm0\n" : :
-	);
-
-	for (i = 0; i < 4096/64; i++) {
-		__asm__ __volatile__ (
-		"  movntq %%mm0, (%0)\n"
-		"  movntq %%mm0, 8(%0)\n"
-		"  movntq %%mm0, 16(%0)\n"
-		"  movntq %%mm0, 24(%0)\n"
-		"  movntq %%mm0, 32(%0)\n"
-		"  movntq %%mm0, 40(%0)\n"
-		"  movntq %%mm0, 48(%0)\n"
-		"  movntq %%mm0, 56(%0)\n"
-		: : "r" (page) : "memory");
-		page += 64;
-	}
-
-	/*
-	 * Since movntq is weakly-ordered, a "sfence" is needed to become
-	 * ordered again:
-	 */
-	__asm__ __volatile__("sfence\n"::);
-
-	kernel_fpu_end();
-}
-
-static void fast_copy_page(void *to, void *from)
-{
-	int i;
-
-	kernel_fpu_begin_mask(KFPU_387);
-
-	/*
-	 * maybe the prefetch stuff can go before the expensive fnsave...
-	 * but that is for later. -AV
-	 */
-	__asm__ __volatile__(
-		"1: prefetch (%0)\n"
-		"   prefetch 64(%0)\n"
-		"   prefetch 128(%0)\n"
-		"   prefetch 192(%0)\n"
-		"   prefetch 256(%0)\n"
-		"2:  \n"
-		".section .fixup, \"ax\"\n"
-		"3: movw $0x1AEB, 1b\n"	/* jmp on 26 bytes */
-		"   jmp 2b\n"
-		".previous\n"
-			_ASM_EXTABLE(1b, 3b) : : "r" (from));
-
-	for (i = 0; i < (4096-320)/64; i++) {
-		__asm__ __volatile__ (
-		"1: prefetch 320(%0)\n"
-		"2: movq (%0), %%mm0\n"
-		"   movntq %%mm0, (%1)\n"
-		"   movq 8(%0), %%mm1\n"
-		"   movntq %%mm1, 8(%1)\n"
-		"   movq 16(%0), %%mm2\n"
-		"   movntq %%mm2, 16(%1)\n"
-		"   movq 24(%0), %%mm3\n"
-		"   movntq %%mm3, 24(%1)\n"
-		"   movq 32(%0), %%mm4\n"
-		"   movntq %%mm4, 32(%1)\n"
-		"   movq 40(%0), %%mm5\n"
-		"   movntq %%mm5, 40(%1)\n"
-		"   movq 48(%0), %%mm6\n"
-		"   movntq %%mm6, 48(%1)\n"
-		"   movq 56(%0), %%mm7\n"
-		"   movntq %%mm7, 56(%1)\n"
-		".section .fixup, \"ax\"\n"
-		"3: movw $0x05EB, 1b\n"	/* jmp on 5 bytes */
-		"   jmp 2b\n"
-		".previous\n"
-		_ASM_EXTABLE(1b, 3b) : : "r" (from), "r" (to) : "memory");
-
-		from += 64;
-		to += 64;
-	}
-
-	for (i = (4096-320)/64; i < 4096/64; i++) {
-		__asm__ __volatile__ (
-		"2: movq (%0), %%mm0\n"
-		"   movntq %%mm0, (%1)\n"
-		"   movq 8(%0), %%mm1\n"
-		"   movntq %%mm1, 8(%1)\n"
-		"   movq 16(%0), %%mm2\n"
-		"   movntq %%mm2, 16(%1)\n"
-		"   movq 24(%0), %%mm3\n"
-		"   movntq %%mm3, 24(%1)\n"
-		"   movq 32(%0), %%mm4\n"
-		"   movntq %%mm4, 32(%1)\n"
-		"   movq 40(%0), %%mm5\n"
-		"   movntq %%mm5, 40(%1)\n"
-		"   movq 48(%0), %%mm6\n"
-		"   movntq %%mm6, 48(%1)\n"
-		"   movq 56(%0), %%mm7\n"
-		"   movntq %%mm7, 56(%1)\n"
-			: : "r" (from), "r" (to) : "memory");
-		from += 64;
-		to += 64;
-	}
-	/*
-	 * Since movntq is weakly-ordered, a "sfence" is needed to become
-	 * ordered again:
-	 */
-	__asm__ __volatile__("sfence \n"::);
-	kernel_fpu_end();
-}
-
-#else /* CONFIG_MK7 */
-
-/*
- *	Generic MMX implementation without K7 specific streaming
- */
-static void fast_clear_page(void *page)
-{
-	int i;
-
-	kernel_fpu_begin_mask(KFPU_387);
-
-	__asm__ __volatile__ (
-		"  pxor %%mm0, %%mm0\n" : :
-	);
-
-	for (i = 0; i < 4096/128; i++) {
-		__asm__ __volatile__ (
-		"  movq %%mm0, (%0)\n"
-		"  movq %%mm0, 8(%0)\n"
-		"  movq %%mm0, 16(%0)\n"
-		"  movq %%mm0, 24(%0)\n"
-		"  movq %%mm0, 32(%0)\n"
-		"  movq %%mm0, 40(%0)\n"
-		"  movq %%mm0, 48(%0)\n"
-		"  movq %%mm0, 56(%0)\n"
-		"  movq %%mm0, 64(%0)\n"
-		"  movq %%mm0, 72(%0)\n"
-		"  movq %%mm0, 80(%0)\n"
-		"  movq %%mm0, 88(%0)\n"
-		"  movq %%mm0, 96(%0)\n"
-		"  movq %%mm0, 104(%0)\n"
-		"  movq %%mm0, 112(%0)\n"
-		"  movq %%mm0, 120(%0)\n"
-			: : "r" (page) : "memory");
-		page += 128;
-	}
-
-	kernel_fpu_end();
-}
-
-static void fast_copy_page(void *to, void *from)
-{
-	int i;
-
-	kernel_fpu_begin_mask(KFPU_387);
-
-	__asm__ __volatile__ (
-		"1: prefetch (%0)\n"
-		"   prefetch 64(%0)\n"
-		"   prefetch 128(%0)\n"
-		"   prefetch 192(%0)\n"
-		"   prefetch 256(%0)\n"
-		"2:  \n"
-		".section .fixup, \"ax\"\n"
-		"3: movw $0x1AEB, 1b\n"	/* jmp on 26 bytes */
-		"   jmp 2b\n"
-		".previous\n"
-			_ASM_EXTABLE(1b, 3b) : : "r" (from));
-
-	for (i = 0; i < 4096/64; i++) {
-		__asm__ __volatile__ (
-		"1: prefetch 320(%0)\n"
-		"2: movq (%0), %%mm0\n"
-		"   movq 8(%0), %%mm1\n"
-		"   movq 16(%0), %%mm2\n"
-		"   movq 24(%0), %%mm3\n"
-		"   movq %%mm0, (%1)\n"
-		"   movq %%mm1, 8(%1)\n"
-		"   movq %%mm2, 16(%1)\n"
-		"   movq %%mm3, 24(%1)\n"
-		"   movq 32(%0), %%mm0\n"
-		"   movq 40(%0), %%mm1\n"
-		"   movq 48(%0), %%mm2\n"
-		"   movq 56(%0), %%mm3\n"
-		"   movq %%mm0, 32(%1)\n"
-		"   movq %%mm1, 40(%1)\n"
-		"   movq %%mm2, 48(%1)\n"
-		"   movq %%mm3, 56(%1)\n"
-		".section .fixup, \"ax\"\n"
-		"3: movw $0x05EB, 1b\n"	/* jmp on 5 bytes */
-		"   jmp 2b\n"
-		".previous\n"
-			_ASM_EXTABLE(1b, 3b)
-			: : "r" (from), "r" (to) : "memory");
-
-		from += 64;
-		to += 64;
-	}
-	kernel_fpu_end();
-}
-
-#endif /* !CONFIG_MK7 */
-
-/*
- * Favour MMX for page clear and copy:
- */
-static void slow_zero_page(void *page)
-{
-	int d0, d1;
-
-	__asm__ __volatile__(
-		"cld\n\t"
-		"rep ; stosl"
-
-			: "=&c" (d0), "=&D" (d1)
-			:"a" (0), "1" (page), "0" (1024)
-			:"memory");
-}
-
-void mmx_clear_page(void *page)
-{
-	if (unlikely(in_interrupt()))
-		slow_zero_page(page);
-	else
-		fast_clear_page(page);
-}
-EXPORT_SYMBOL(mmx_clear_page);
-
-static void slow_copy_page(void *to, void *from)
-{
-	int d0, d1, d2;
-
-	__asm__ __volatile__(
-		"cld\n\t"
-		"rep ; movsl"
-		: "=&c" (d0), "=&D" (d1), "=&S" (d2)
-		: "0" (1024), "1" ((long) to), "2" ((long) from)
-		: "memory");
-}
-
-void mmx_copy_page(void *to, void *from)
-{
-	if (unlikely(in_interrupt()))
-		slow_copy_page(to, from);
-	else
-		fast_copy_page(to, from);
-}
-EXPORT_SYMBOL(mmx_copy_page);
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-10-19 13:19:12 +0000