+++ /dev/null
-commit 8511b7b083db01ad0538bea6a8af79f88fe02a8b
-Author: hschang <chang@dev3>
-Date: Wed Jan 8 20:32:42 2014 +0900
-
- MIPS: Refactor 'clear_page' and 'copy_page' functions.
-
- Remove usage of the '__attribute__((alias("...")))' hack that aliased
- to integer arrays containing micro-assembled instructions. This hack
- breaks when building a microMIPS kernel. It also makes the code much
- easier to understand.
-
- [ralf@linux-mips.org: Added back export of the clear_page and copy_page
- symbols so certain modules will work again. Also fixed build with
- CONFIG_SIBYTE_DMA_PAGEOPS enabled.]
-
- Signed-off-by: Steven J. Hill <sjhill@mips.com>
- Cc: linux-mips@linux-mips.org
- Patchwork: https://patchwork.linux-mips.org/patch/3866/
- Acked-by: David Daney <david.daney@cavium.com>
- Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
-
-diff --git a/arch/mips/kernel/mips_ksyms.c b/arch/mips/kernel/mips_ksyms.c
-index 1d04807..17160bf 100644
---- a/arch/mips/kernel/mips_ksyms.c
-+++ b/arch/mips/kernel/mips_ksyms.c
-@@ -5,7 +5,7 @@
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
-- * Copyright (C) 1996, 97, 98, 99, 2000, 01, 03, 04, 05 by Ralf Baechle
-+ * Copyright (C) 1996, 97, 98, 99, 2000, 01, 03, 04, 05, 12 by Ralf Baechle
- * Copyright (C) 1999, 2000, 01 Silicon Graphics, Inc.
- */
- #include <linux/interrupt.h>
-@@ -35,6 +35,13 @@ EXPORT_SYMBOL(memmove);
- EXPORT_SYMBOL(kernel_thread);
-
- /*
-+ * Functions that operate on entire pages. Mostly used by memory management.
-+ */
-+
-+EXPORT_SYMBOL(clear_page);
-+EXPORT_SYMBOL(copy_page);
-+
-+/*
- * Userspace access stuff.
- */
- EXPORT_SYMBOL(__copy_user);
-diff --git a/arch/mips/mm/Makefile b/arch/mips/mm/Makefile
-index 95e5ccb..2f2dc25 100644
---- a/arch/mips/mm/Makefile
-+++ b/arch/mips/mm/Makefile
-@@ -4,7 +4,7 @@
-
- obj-y += cache.o dma-default.o extable.o fault.o \
- init.o mmap.o tlbex.o tlbex-fault.o uasm.o \
-- page.o
-+ page.o page-funcs.o
-
- obj-$(CONFIG_32BIT) += ioremap.o pgtable-32.o
- obj-$(CONFIG_64BIT) += pgtable-64.o
-diff --git a/arch/mips/mm/page-funcs.S b/arch/mips/mm/page-funcs.S
-new file mode 100644
-index 0000000..48a6b38
---- /dev/null
-+++ b/arch/mips/mm/page-funcs.S
-@@ -0,0 +1,50 @@
-+/*
-+ * This file is subject to the terms and conditions of the GNU General Public
-+ * License. See the file "COPYING" in the main directory of this archive
-+ * for more details.
-+ *
-+ * Micro-assembler generated clear_page/copy_page functions.
-+ *
-+ * Copyright (C) 2012 MIPS Technologies, Inc.
-+ * Copyright (C) 2012 Ralf Baechle <ralf@linux-mips.org>
-+ */
-+#include <asm/asm.h>
-+#include <asm/regdef.h>
-+
-+#ifdef CONFIG_SIBYTE_DMA_PAGEOPS
-+#define cpu_clear_page_function_name clear_page_cpu
-+#define cpu_copy_page_function_name copy_page_cpu
-+#else
-+#define cpu_clear_page_function_name clear_page
-+#define cpu_copy_page_function_name copy_page
-+#endif
-+
-+/*
-+ * Maximum sizes:
-+ *
-+ * R4000 128 bytes S-cache: 0x058 bytes
-+ * R4600 v1.7: 0x05c bytes
-+ * R4600 v2.0: 0x060 bytes
-+ * With prefetching, 16 word strides 0x120 bytes
-+ */
-+EXPORT(__clear_page_start)
-+LEAF(cpu_clear_page_function_name)
-+1: j 1b /* Dummy, will be replaced. */
-+ .space 288
-+END(cpu_clear_page_function_name)
-+EXPORT(__clear_page_end)
-+
-+/*
-+ * Maximum sizes:
-+ *
-+ * R4000 128 bytes S-cache: 0x11c bytes
-+ * R4600 v1.7: 0x080 bytes
-+ * R4600 v2.0: 0x07c bytes
-+ * With prefetching, 16 word strides 0x540 bytes
-+ */
-+EXPORT(__copy_page_start)
-+LEAF(cpu_copy_page_function_name)
-+1: j 1b /* Dummy, will be replaced. */
-+ .space 1344
-+END(cpu_copy_page_function_name)
-+EXPORT(__copy_page_end)
-diff --git a/arch/mips/mm/page.c b/arch/mips/mm/page.c
-index 36272f7..a22bd40 100644
---- a/arch/mips/mm/page.c
-+++ b/arch/mips/mm/page.c
-@@ -6,6 +6,7 @@
- * Copyright (C) 2003, 04, 05 Ralf Baechle (ralf@linux-mips.org)
- * Copyright (C) 2007 Maciej W. Rozycki
- * Copyright (C) 2008 Thiemo Seufer
-+ * Copyright (C) 2012 MIPS Technologies, Inc.
- */
- #include <linux/init.h>
- #include <linux/kernel.h>
-@@ -72,45 +73,6 @@ static struct uasm_reloc __cpuinitdata relocs[5];
- #define cpu_is_r4600_v1_x() ((read_c0_prid() & 0xfffffff0) == 0x00002010)
- #define cpu_is_r4600_v2_x() ((read_c0_prid() & 0xfffffff0) == 0x00002020)
-
--/*
-- * Maximum sizes:
-- *
-- * R4000 128 bytes S-cache: 0x058 bytes
-- * R4600 v1.7: 0x05c bytes
-- * R4600 v2.0: 0x060 bytes
-- * With prefetching, 16 word strides 0x120 bytes
-- */
--
--static u32 clear_page_array[0x120 / 4];
--
--#ifdef CONFIG_SIBYTE_DMA_PAGEOPS
--void clear_page_cpu(void *page) __attribute__((alias("clear_page_array")));
--#else
--void clear_page(void *page) __attribute__((alias("clear_page_array")));
--#endif
--
--EXPORT_SYMBOL(clear_page);
--
--/*
-- * Maximum sizes:
-- *
-- * R4000 128 bytes S-cache: 0x11c bytes
-- * R4600 v1.7: 0x080 bytes
-- * R4600 v2.0: 0x07c bytes
-- * With prefetching, 16 word strides 0x540 bytes
-- */
--static u32 copy_page_array[0x540 / 4];
--
--#ifdef CONFIG_SIBYTE_DMA_PAGEOPS
--void
--copy_page_cpu(void *to, void *from) __attribute__((alias("copy_page_array")));
--#else
--void copy_page(void *to, void *from) __attribute__((alias("copy_page_array")));
--#endif
--
--EXPORT_SYMBOL(copy_page);
--
--
- static int pref_bias_clear_store __cpuinitdata;
- static int pref_bias_copy_load __cpuinitdata;
- static int pref_bias_copy_store __cpuinitdata;
-@@ -283,10 +245,15 @@ static inline void __cpuinit build_clear_pref(u32 **buf, int off)
- }
- }
-
-+extern u32 __clear_page_start;
-+extern u32 __clear_page_end;
-+extern u32 __copy_page_start;
-+extern u32 __copy_page_end;
-+
- void __cpuinit build_clear_page(void)
- {
- int off;
-- u32 *buf = (u32 *)&clear_page_array;
-+ u32 *buf = &__clear_page_start;
- struct uasm_label *l = labels;
- struct uasm_reloc *r = relocs;
- int i;
-@@ -357,17 +324,17 @@ void __cpuinit build_clear_page(void)
- uasm_i_jr(&buf, RA);
- uasm_i_nop(&buf);
-
-- BUG_ON(buf > clear_page_array + ARRAY_SIZE(clear_page_array));
-+ BUG_ON(buf > &__clear_page_end);
-
- uasm_resolve_relocs(relocs, labels);
-
- pr_debug("Synthesized clear page handler (%u instructions).\n",
-- (u32)(buf - clear_page_array));
-+ (u32)(buf - &__clear_page_start));
-
- pr_debug("\t.set push\n");
- pr_debug("\t.set noreorder\n");
-- for (i = 0; i < (buf - clear_page_array); i++)
-- pr_debug("\t.word 0x%08x\n", clear_page_array[i]);
-+ for (i = 0; i < (buf - &__clear_page_start); i++)
-+ pr_debug("\t.word 0x%08x\n", (&__clear_page_start)[i]);
- pr_debug("\t.set pop\n");
- }
-
-@@ -428,7 +395,7 @@ static inline void build_copy_store_pref(u32 **buf, int off)
- void __cpuinit build_copy_page(void)
- {
- int off;
-- u32 *buf = (u32 *)©_page_array;
-+ u32 *buf = &__copy_page_start;
- struct uasm_label *l = labels;
- struct uasm_reloc *r = relocs;
- int i;
-@@ -596,21 +563,23 @@ void __cpuinit build_copy_page(void)
- uasm_i_jr(&buf, RA);
- uasm_i_nop(&buf);
-
-- BUG_ON(buf > copy_page_array + ARRAY_SIZE(copy_page_array));
-+ BUG_ON(buf > &__copy_page_end);
-
- uasm_resolve_relocs(relocs, labels);
-
- pr_debug("Synthesized copy page handler (%u instructions).\n",
-- (u32)(buf - copy_page_array));
-+ (u32)(buf - &__copy_page_start));
-
- pr_debug("\t.set push\n");
- pr_debug("\t.set noreorder\n");
-- for (i = 0; i < (buf - copy_page_array); i++)
-- pr_debug("\t.word 0x%08x\n", copy_page_array[i]);
-+ for (i = 0; i < (buf - &__copy_page_start); i++)
-+ pr_debug("\t.word 0x%08x\n", (&__copy_page_start)[i]);
- pr_debug("\t.set pop\n");
- }
-
- #ifdef CONFIG_SIBYTE_DMA_PAGEOPS
-+extern void clear_page_cpu(void *page);
-+extern void copy_page_cpu(void *to, void *from);
-
- /*
- * Pad descriptors to cacheline, since each is exclusively owned by a
projects / vuplus_openvuplus_3.0 / blobdiff