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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/arm/include/asm/fncpy.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/include/asm/fncpy.h')
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diff --git a/ANDROID_3.4.5/arch/arm/include/asm/fncpy.h b/ANDROID_3.4.5/arch/arm/include/asm/fncpy.h
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@@ -1,94 +0,0 @@
-/*
- * arch/arm/include/asm/fncpy.h - helper macros for function body copying
- *
- * Copyright (C) 2011 Linaro Limited
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * 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. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-/*
- * These macros are intended for use when there is a need to copy a low-level
- * function body into special memory.
- *
- * For example, when reconfiguring the SDRAM controller, the code doing the
- * reconfiguration may need to run from SRAM.
- *
- * NOTE: that the copied function body must be entirely self-contained and
- * position-independent in order for this to work properly.
- *
- * NOTE: in order for embedded literals and data to get referenced correctly,
- * the alignment of functions must be preserved when copying. To ensure this,
- * the source and destination addresses for fncpy() must be aligned to a
- * multiple of 8 bytes: you will be get a BUG() if this condition is not met.
- * You will typically need a ".align 3" directive in the assembler where the
- * function to be copied is defined, and ensure that your allocator for the
- * destination buffer returns 8-byte-aligned pointers.
- *
- * Typical usage example:
- *
- * extern int f(args);
- * extern uint32_t size_of_f;
- * int (*copied_f)(args);
- * void *sram_buffer;
- *
- * copied_f = fncpy(sram_buffer, &f, size_of_f);
- *
- * ... later, call the function: ...
- *
- * copied_f(args);
- *
- * The size of the function to be copied can't be determined from C:
- * this must be determined by other means, such as adding assmbler directives
- * in the file where f is defined.
- */
-
-#ifndef __ASM_FNCPY_H
-#define __ASM_FNCPY_H
-
-#include <linux/types.h>
-#include <linux/string.h>
-
-#include <asm/bug.h>
-#include <asm/cacheflush.h>
-
-/*
- * Minimum alignment requirement for the source and destination addresses
- * for function copying.
- */
-#define FNCPY_ALIGN 8
-
-#define fncpy(dest_buf, funcp, size) ({ \
- uintptr_t __funcp_address; \
- typeof(funcp) __result; \
- \
- asm("" : "=r" (__funcp_address) : "0" (funcp)); \
- \
- /* \
- * Ensure alignment of source and destination addresses, \
- * disregarding the function's Thumb bit: \
- */ \
- BUG_ON((uintptr_t)(dest_buf) & (FNCPY_ALIGN - 1) || \
- (__funcp_address & ~(uintptr_t)1 & (FNCPY_ALIGN - 1))); \
- \
- memcpy(dest_buf, (void const *)(__funcp_address & ~1), size); \
- flush_icache_range((unsigned long)(dest_buf), \
- (unsigned long)(dest_buf) + (size)); \
- \
- asm("" : "=r" (__result) \
- : "0" ((uintptr_t)(dest_buf) | (__funcp_address & 1))); \
- \
- __result; \
-})
-
-#endif /* !__ASM_FNCPY_H */