release/src-rt-6.x.4708/linux/linux-2.6.36/arch/sh/include/cpu-sh5/cpu/cache.h

   1 #ifndef __ASM_SH_CPU_SH5_CACHE_H
   2 #define __ASM_SH_CPU_SH5_CACHE_H
   3
   4 /*
   5  * include/asm-sh/cpu-sh5/cache.h
   6  *
   7  * Copyright (C) 2000, 2001  Paolo Alberelli
   8  * Copyright (C) 2003, 2004  Paul Mundt
   9  *
  10  * This file is subject to the terms and conditions of the GNU General Public
  11  * License.  See the file "COPYING" in the main directory of this archive
  12  * for more details.
  13  */
  14
  15 #define L1_CACHE_SHIFT          5
  16
  17 /* Valid and Dirty bits */
  18 #define SH_CACHE_VALID          (1LL<<0)
  19 #define SH_CACHE_UPDATED        (1LL<<57)
  20
  21 /* Unimplemented compat bits.. */
  22 #define SH_CACHE_COMBINED       0
  23 #define SH_CACHE_ASSOC          0
  24
  25 /* Cache flags */
  26 #define SH_CACHE_MODE_WT        (1LL<<0)
  27 #define SH_CACHE_MODE_WB        (1LL<<1)
  28
  29 /*
  30  * Control Registers.
  31  */
  32 #define ICCR_BASE       0x01600000      /* Instruction Cache Control Register */
  33 #define ICCR_REG0       0               /* Register 0 offset */
  34 #define ICCR_REG1       1               /* Register 1 offset */
  35 #define ICCR0           ICCR_BASE+ICCR_REG0
  36 #define ICCR1           ICCR_BASE+ICCR_REG1
  37
  38 #define ICCR0_OFF       0x0             /* Set ICACHE off */
  39 #define ICCR0_ON        0x1             /* Set ICACHE on */
  40 #define ICCR0_ICI       0x2             /* Invalidate all in IC */
  41
  42 #define ICCR1_NOLOCK    0x0             /* Set No Locking */
  43
  44 #define OCCR_BASE       0x01E00000      /* Operand Cache Control Register */
  45 #define OCCR_REG0       0               /* Register 0 offset */
  46 #define OCCR_REG1       1               /* Register 1 offset */
  47 #define OCCR0           OCCR_BASE+OCCR_REG0
  48 #define OCCR1           OCCR_BASE+OCCR_REG1
  49
  50 #define OCCR0_OFF       0x0             /* Set OCACHE off */
  51 #define OCCR0_ON        0x1             /* Set OCACHE on */
  52 #define OCCR0_OCI       0x2             /* Invalidate all in OC */
  53 #define OCCR0_WT        0x4             /* Set OCACHE in WT Mode */
  54 #define OCCR0_WB        0x0             /* Set OCACHE in WB Mode */
  55
  56 #define OCCR1_NOLOCK    0x0             /* Set No Locking */
  57
  58 /*
  59  * SH-5
  60  * A bit of description here, for neff=32.
  61  *
  62  *                               |<--- tag  (19 bits) --->|
  63  * +-----------------------------+-----------------+------+----------+------+
  64  * |                             |                 | ways |set index |offset|
  65  * +-----------------------------+-----------------+------+----------+------+
  66  *                                ^                 2 bits   8 bits   5 bits
  67  *                                +- Bit 31
  68  *
  69  * Cacheline size is based on offset: 5 bits = 32 bytes per line
  70  * A cache line is identified by a tag + set but OCACHETAG/ICACHETAG
  71  * have a broader space for registers. These are outlined by
  72  * CACHE_?C_*_STEP below.
  73  *
  74  */
  75
  76 /* Instruction cache */
  77 #define CACHE_IC_ADDRESS_ARRAY 0x01000000
  78
  79 /* Operand Cache */
  80 #define CACHE_OC_ADDRESS_ARRAY 0x01800000
  81
  82 /* These declarations relate to cache 'synonyms' in the operand cache.  A
  83    'synonym' occurs where effective address bits overlap between those used for
  84    indexing the cache sets and those passed to the MMU for translation.  In the
  85    case of SH5-101 & SH5-103, only bit 12 is affected for 4k pages. */
  86
  87 #define CACHE_OC_N_SYNBITS  1               /* Number of synonym bits */
  88 #define CACHE_OC_SYN_SHIFT  12
  89 /* Mask to select synonym bit(s) */
  90 #define CACHE_OC_SYN_MASK   (((1UL<<CACHE_OC_N_SYNBITS)-1)<<CACHE_OC_SYN_SHIFT)
  91
  92 /*
  93  * Instruction cache can't be invalidated based on physical addresses.
  94  * No Instruction Cache defines required, then.
  95  */
  96
  97 #endif /* __ASM_SH_CPU_SH5_CACHE_H */