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/regdef.h>
  13
  14 #ifdef CONFIG_SIBYTE_DMA_PAGEOPS
  15 #define cpu_clear_page_function_name    clear_page_cpu
  16 #define cpu_copy_page_function_name     copy_page_cpu
  17 #else
  18 #define cpu_clear_page_function_name    clear_page
  19 #define cpu_copy_page_function_name     copy_page
  20 #endif
  21
  22 /*
  23  * Maximum sizes:
  24  *
  25  * R4000 128 bytes S-cache:             0x058 bytes
  26  * R4600 v1.7:                          0x05c bytes
  27  * R4600 v2.0:                          0x060 bytes
  28  * With prefetching, 16 word strides    0x120 bytes
  29  */
  30 EXPORT(__clear_page_start)
  31 LEAF(cpu_clear_page_function_name)
  32 1:      j       1b              /* Dummy, will be replaced. */
  33         .space 288
  34 END(cpu_clear_page_function_name)
  35 EXPORT(__clear_page_end)
  36
  37 /*
  38  * Maximum sizes:
  39  *
  40  * R4000 128 bytes S-cache:             0x11c bytes
  41  * R4600 v1.7:                          0x080 bytes
  42  * R4600 v2.0:                          0x07c bytes
  43  * With prefetching, 16 word strides    0x540 bytes
  44  */
  45 EXPORT(__copy_page_start)
  46 LEAF(cpu_copy_page_function_name)
  47 1:      j       1b              /* Dummy, will be replaced. */
  48         .space 1344
  49 END(cpu_copy_page_function_name)
  50 EXPORT(__copy_page_end)