linux/arch/tile/include/asm/kmap_types.h
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   1/*
   2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
   3 *
   4 *   This program is free software; you can redistribute it and/or
   5 *   modify it under the terms of the GNU General Public License
   6 *   as published by the Free Software Foundation, version 2.
   7 *
   8 *   This program is distributed in the hope that it will be useful, but
   9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11 *   NON INFRINGEMENT.  See the GNU General Public License for
  12 *   more details.
  13 */
  14
  15#ifndef _ASM_TILE_KMAP_TYPES_H
  16#define _ASM_TILE_KMAP_TYPES_H
  17
  18/*
  19 * In 32-bit TILE Linux we have to balance the desire to have a lot of
  20 * nested atomic mappings with the fact that large page sizes and many
  21 * processors chew up address space quickly.  In a typical
  22 * 64-processor, 64KB-page layout build, making KM_TYPE_NR one larger
  23 * adds 4MB of required address-space.  For now we leave KM_TYPE_NR
  24 * set to depth 8.
  25 */
  26enum km_type {
  27        KM_TYPE_NR = 8
  28};
  29
  30/*
  31 * We provide dummy definitions of all the stray values that used to be
  32 * required for kmap_atomic() and no longer are.
  33 */
  34enum {
  35        KM_BOUNCE_READ,
  36        KM_SKB_SUNRPC_DATA,
  37        KM_SKB_DATA_SOFTIRQ,
  38        KM_USER0,
  39        KM_USER1,
  40        KM_BIO_SRC_IRQ,
  41        KM_BIO_DST_IRQ,
  42        KM_PTE0,
  43        KM_PTE1,
  44        KM_IRQ0,
  45        KM_IRQ1,
  46        KM_SOFTIRQ0,
  47        KM_SOFTIRQ1,
  48        KM_SYNC_ICACHE,
  49        KM_SYNC_DCACHE,
  50        KM_UML_USERCOPY,
  51        KM_IRQ_PTE,
  52        KM_NMI,
  53        KM_NMI_PTE,
  54        KM_KDB
  55};
  56
  57#endif /* _ASM_TILE_KMAP_TYPES_H */
  58
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