summaryrefslogtreecommitdiff
path: root/arch/ia64/lib/clear_page.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ia64/lib/clear_page.S')
-rw-r--r--arch/ia64/lib/clear_page.S79
1 files changed, 0 insertions, 79 deletions
diff --git a/arch/ia64/lib/clear_page.S b/arch/ia64/lib/clear_page.S
deleted file mode 100644
index ba0dd2538fa5..000000000000
--- a/arch/ia64/lib/clear_page.S
+++ /dev/null
@@ -1,79 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (C) 1999-2002 Hewlett-Packard Co
- * Stephane Eranian <eranian@hpl.hp.com>
- * David Mosberger-Tang <davidm@hpl.hp.com>
- * Copyright (C) 2002 Ken Chen <kenneth.w.chen@intel.com>
- *
- * 1/06/01 davidm Tuned for Itanium.
- * 2/12/02 kchen Tuned for both Itanium and McKinley
- * 3/08/02 davidm Some more tweaking
- */
-
-#include <linux/export.h>
-#include <asm/asmmacro.h>
-#include <asm/page.h>
-
-#ifdef CONFIG_ITANIUM
-# define L3_LINE_SIZE 64 // Itanium L3 line size
-# define PREFETCH_LINES 9 // magic number
-#else
-# define L3_LINE_SIZE 128 // McKinley L3 line size
-# define PREFETCH_LINES 12 // magic number
-#endif
-
-#define saved_lc r2
-#define dst_fetch r3
-#define dst1 r8
-#define dst2 r9
-#define dst3 r10
-#define dst4 r11
-
-#define dst_last r31
-
-GLOBAL_ENTRY(clear_page)
- .prologue
- .regstk 1,0,0,0
- mov r16 = PAGE_SIZE/L3_LINE_SIZE-1 // main loop count, -1=repeat/until
- .save ar.lc, saved_lc
- mov saved_lc = ar.lc
-
- .body
- mov ar.lc = (PREFETCH_LINES - 1)
- mov dst_fetch = in0
- adds dst1 = 16, in0
- adds dst2 = 32, in0
- ;;
-.fetch: stf.spill.nta [dst_fetch] = f0, L3_LINE_SIZE
- adds dst3 = 48, in0 // executing this multiple times is harmless
- br.cloop.sptk.few .fetch
- ;;
- addl dst_last = (PAGE_SIZE - PREFETCH_LINES*L3_LINE_SIZE), dst_fetch
- mov ar.lc = r16 // one L3 line per iteration
- adds dst4 = 64, in0
- ;;
-#ifdef CONFIG_ITANIUM
- // Optimized for Itanium
-1: stf.spill.nta [dst1] = f0, 64
- stf.spill.nta [dst2] = f0, 64
- cmp.lt p8,p0=dst_fetch, dst_last
- ;;
-#else
- // Optimized for McKinley
-1: stf.spill.nta [dst1] = f0, 64
- stf.spill.nta [dst2] = f0, 64
- stf.spill.nta [dst3] = f0, 64
- stf.spill.nta [dst4] = f0, 128
- cmp.lt p8,p0=dst_fetch, dst_last
- ;;
- stf.spill.nta [dst1] = f0, 64
- stf.spill.nta [dst2] = f0, 64
-#endif
- stf.spill.nta [dst3] = f0, 64
-(p8) stf.spill.nta [dst_fetch] = f0, L3_LINE_SIZE
- br.cloop.sptk.few 1b
- ;;
- mov ar.lc = saved_lc // restore lc
- br.ret.sptk.many rp
-END(clear_page)
-EXPORT_SYMBOL(clear_page)