root/arch/mips/mm/page-funcs.S

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Micro-assembler generated clear_page/copy_page functions.
   7  *
   8  * Copyright (C) 2012  MIPS Technologies, Inc.
   9  * Copyright (C) 2012  Ralf Baechle <ralf@linux-mips.org>
  10  */
  11 #include <asm/asm.h>
  12 #include <asm/export.h>
  13 #include <asm/regdef.h>
  14 
  15 #ifdef CONFIG_SIBYTE_DMA_PAGEOPS
  16 #define cpu_clear_page_function_name    clear_page_cpu
  17 #define cpu_copy_page_function_name     copy_page_cpu
  18 #else
  19 #define cpu_clear_page_function_name    clear_page
  20 #define cpu_copy_page_function_name     copy_page
  21 #endif
  22 
  23 /*
  24  * Maximum sizes:
  25  *
  26  * R4000 128 bytes S-cache:             0x058 bytes
  27  * R4600 v1.7:                          0x05c bytes
  28  * R4600 v2.0:                          0x060 bytes
  29  * With prefetching, 16 word strides    0x120 bytes
  30  */
  31 EXPORT(__clear_page_start)
  32 LEAF(cpu_clear_page_function_name)
  33 EXPORT_SYMBOL(cpu_clear_page_function_name)
  34 1:      j       1b              /* Dummy, will be replaced. */
  35         .space 288
  36 END(cpu_clear_page_function_name)
  37 EXPORT(__clear_page_end)
  38 
  39 /*
  40  * Maximum sizes:
  41  *
  42  * R4000 128 bytes S-cache:             0x11c bytes
  43  * R4600 v1.7:                          0x080 bytes
  44  * R4600 v2.0:                          0x07c bytes
  45  * With prefetching, 16 word strides    0x540 bytes
  46  */
  47 EXPORT(__copy_page_start)
  48 LEAF(cpu_copy_page_function_name)
  49 EXPORT_SYMBOL(cpu_copy_page_function_name)
  50 1:      j       1b              /* Dummy, will be replaced. */
  51         .space 1344
  52 END(cpu_copy_page_function_name)
  53 EXPORT(__copy_page_end)