release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/octeon/cvmx-address.h

   1 /***********************license start***************
   2  * Author: Cavium Networks
   3  *
   4  * Contact: support@caviumnetworks.com
   5  * This file is part of the OCTEON SDK
   6  *
   7  * Copyright (c) 2003-2009 Cavium Networks
   8  *
   9  * This file is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License, Version 2, as
  11  * published by the Free Software Foundation.
  12  *
  13  * This file is distributed in the hope that it will be useful, but
  14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
  15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
  16  * NONINFRINGEMENT.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this file; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  22  * or visit http://www.gnu.org/licenses/.
  23  *
  24  * This file may also be available under a different license from Cavium.
  25  * Contact Cavium Networks for more information
  26  ***********************license end**************************************/
  27
  28 /**
  29  * Typedefs and defines for working with Octeon physical addresses.
  30  *
  31  */
  32 #ifndef __CVMX_ADDRESS_H__
  33 #define __CVMX_ADDRESS_H__
  34
  35
  36 typedef enum {
  37         CVMX_MIPS_XKSEG_SPACE_KSEG0 = 0LL,
  38         CVMX_MIPS_XKSEG_SPACE_KSEG1 = 1LL,
  39         CVMX_MIPS_XKSEG_SPACE_SSEG = 2LL,
  40         CVMX_MIPS_XKSEG_SPACE_KSEG3 = 3LL
  41 } cvmx_mips_xkseg_space_t;
  42
  43 /* decodes <14:13> of a kseg3 window address */
  44 typedef enum {
  45         CVMX_ADD_WIN_SCR = 0L,
  46         /* see cvmx_add_win_dma_dec_t for further decode */
  47         CVMX_ADD_WIN_DMA = 1L,
  48         CVMX_ADD_WIN_UNUSED = 2L,
  49         CVMX_ADD_WIN_UNUSED2 = 3L
  50 } cvmx_add_win_dec_t;
  51
  52 /* decode within DMA space */
  53 typedef enum {
  54         /*
  55          * Add store data to the write buffer entry, allocating it if
  56          * necessary.
  57          */
  58         CVMX_ADD_WIN_DMA_ADD = 0L,
  59         /* send out the write buffer entry to DRAM */
  60         CVMX_ADD_WIN_DMA_SENDMEM = 1L,
  61         /* store data must be normal DRAM memory space address in this case */
  62         /* send out the write buffer entry as an IOBDMA command */
  63         CVMX_ADD_WIN_DMA_SENDDMA = 2L,
  64         /* see CVMX_ADD_WIN_DMA_SEND_DEC for data contents */
  65         /* send out the write buffer entry as an IO write */
  66         CVMX_ADD_WIN_DMA_SENDIO = 3L,
  67         /* store data must be normal IO space address in this case */
  68         /* send out a single-tick command on the NCB bus */
  69         CVMX_ADD_WIN_DMA_SENDSINGLE = 4L,
  70         /* no write buffer data needed/used */
  71 } cvmx_add_win_dma_dec_t;
  72
  73 /*
  74  *   Physical Address Decode
  75  *
  76  * Octeon-I HW never interprets this X (<39:36> reserved
  77  * for future expansion), software should set to 0.
  78  *
  79  *  - 0x0 XXX0 0000 0000 to      DRAM         Cached
  80  *  - 0x0 XXX0 0FFF FFFF
  81  *
  82  *  - 0x0 XXX0 1000 0000 to      Boot Bus     Uncached  (Converted to 0x1 00X0 1000 0000
  83  *  - 0x0 XXX0 1FFF FFFF         + EJTAG                           to 0x1 00X0 1FFF FFFF)
  84  *
  85  *  - 0x0 XXX0 2000 0000 to      DRAM         Cached
  86  *  - 0x0 XXXF FFFF FFFF
  87  *
  88  *  - 0x1 00X0 0000 0000 to      Boot Bus     Uncached
  89  *  - 0x1 00XF FFFF FFFF
  90  *
  91  *  - 0x1 01X0 0000 0000 to      Other NCB    Uncached
  92  *  - 0x1 FFXF FFFF FFFF         devices
  93  *
  94  * Decode of all Octeon addresses
  95  */
  96 typedef union {
  97
  98         uint64_t u64;
  99         /* mapped or unmapped virtual address */
 100         struct {
 101                 uint64_t R:2;
 102                 uint64_t offset:62;
 103         } sva;
 104
 105         /* mapped USEG virtual addresses (typically) */
 106         struct {
 107                 uint64_t zeroes:33;
 108                 uint64_t offset:31;
 109         } suseg;
 110
 111         /* mapped or unmapped virtual address */
 112         struct {
 113                 uint64_t ones:33;
 114                 uint64_t sp:2;
 115                 uint64_t offset:29;
 116         } sxkseg;
 117
 118         /*
 119          * physical address accessed through xkphys unmapped virtual
 120          * address.
 121          */
 122         struct {
 123                 uint64_t R:2;   /* CVMX_MIPS_SPACE_XKPHYS in this case */
 124                 uint64_t cca:3; /* ignored by octeon */
 125                 uint64_t mbz:10;
 126                 uint64_t pa:49; /* physical address */
 127         } sxkphys;
 128
 129         /* physical address */
 130         struct {
 131                 uint64_t mbz:15;
 132                 /* if set, the address is uncached and resides on MCB bus */
 133                 uint64_t is_io:1;
 134                 /*
 135                  * the hardware ignores this field when is_io==0, else
 136                  * device ID.
 137                  */
 138                 uint64_t did:8;
 139                 /* the hardware ignores <39:36> in Octeon I */
 140                 uint64_t unaddr:4;
 141                 uint64_t offset:36;
 142         } sphys;
 143
 144         /* physical mem address */
 145         struct {
 146                 /* techically, <47:40> are dont-cares */
 147                 uint64_t zeroes:24;
 148                 /* the hardware ignores <39:36> in Octeon I */
 149                 uint64_t unaddr:4;
 150                 uint64_t offset:36;
 151         } smem;
 152
 153         /* physical IO address */
 154         struct {
 155                 uint64_t mem_region:2;
 156                 uint64_t mbz:13;
 157                 /* 1 in this case */
 158                 uint64_t is_io:1;
 159                 /*
 160                  * The hardware ignores this field when is_io==0, else
 161                  * device ID.
 162                  */
 163                 uint64_t did:8;
 164                 /* the hardware ignores <39:36> in Octeon I */
 165                 uint64_t unaddr:4;
 166                 uint64_t offset:36;
 167         } sio;
 168
 169         /*
 170          * Scratchpad virtual address - accessed through a window at
 171          * the end of kseg3
 172          */
 173         struct {
 174                 uint64_t ones:49;
 175                 /* CVMX_ADD_WIN_SCR (0) in this case */
 176                 cvmx_add_win_dec_t csrdec:2;
 177                 uint64_t addr:13;
 178         } sscr;
 179
 180         /* there should only be stores to IOBDMA space, no loads */
 181         /*
 182          * IOBDMA virtual address - accessed through a window at the
 183          * end of kseg3
 184          */
 185         struct {
 186                 uint64_t ones:49;
 187                 uint64_t csrdec:2;      /* CVMX_ADD_WIN_DMA (1) in this case */
 188                 uint64_t unused2:3;
 189                 uint64_t type:3;
 190                 uint64_t addr:7;
 191         } sdma;
 192
 193         struct {
 194                 uint64_t didspace:24;
 195                 uint64_t unused:40;
 196         } sfilldidspace;
 197
 198 } cvmx_addr_t;
 199
 200 /* These macros for used by 32 bit applications */
 201
 202 #define CVMX_MIPS32_SPACE_KSEG0 1l
 203 #define CVMX_ADD_SEG32(segment, add) \
 204         (((int32_t)segment << 31) | (int32_t)(add))
 205
 206 /*
 207  * Currently all IOs are performed using XKPHYS addressing. Linux uses
 208  * the CvmMemCtl register to enable XKPHYS addressing to IO space from
 209  * user mode.  Future OSes may need to change the upper bits of IO
 210  * addresses. The following define controls the upper two bits for all
 211  * IO addresses generated by the simple executive library.
 212  */
 213 #define CVMX_IO_SEG CVMX_MIPS_SPACE_XKPHYS
 214
 215 /* These macros simplify the process of creating common IO addresses */
 216 #define CVMX_ADD_SEG(segment, add) ((((uint64_t)segment) << 62) | (add))
 217 #ifndef CVMX_ADD_IO_SEG
 218 #define CVMX_ADD_IO_SEG(add) CVMX_ADD_SEG(CVMX_IO_SEG, (add))
 219 #endif
 220 #define CVMX_ADDR_DIDSPACE(did) (((CVMX_IO_SEG) << 22) | ((1ULL) << 8) | (did))
 221 #define CVMX_ADDR_DID(did) (CVMX_ADDR_DIDSPACE(did) << 40)
 222 #define CVMX_FULL_DID(did, subdid) (((did) << 3) | (subdid))
 223
 224   /* from include/ncb_rsl_id.v */
 225 #define CVMX_OCT_DID_MIS 0ULL   /* misc stuff */
 226 #define CVMX_OCT_DID_GMX0 1ULL
 227 #define CVMX_OCT_DID_GMX1 2ULL
 228 #define CVMX_OCT_DID_PCI 3ULL
 229 #define CVMX_OCT_DID_KEY 4ULL
 230 #define CVMX_OCT_DID_FPA 5ULL
 231 #define CVMX_OCT_DID_DFA 6ULL
 232 #define CVMX_OCT_DID_ZIP 7ULL
 233 #define CVMX_OCT_DID_RNG 8ULL
 234 #define CVMX_OCT_DID_IPD 9ULL
 235 #define CVMX_OCT_DID_PKT 10ULL
 236 #define CVMX_OCT_DID_TIM 11ULL
 237 #define CVMX_OCT_DID_TAG 12ULL
 238   /* the rest are not on the IO bus */
 239 #define CVMX_OCT_DID_L2C 16ULL
 240 #define CVMX_OCT_DID_LMC 17ULL
 241 #define CVMX_OCT_DID_SPX0 18ULL
 242 #define CVMX_OCT_DID_SPX1 19ULL
 243 #define CVMX_OCT_DID_PIP 20ULL
 244 #define CVMX_OCT_DID_ASX0 22ULL
 245 #define CVMX_OCT_DID_ASX1 23ULL
 246 #define CVMX_OCT_DID_IOB 30ULL
 247
 248 #define CVMX_OCT_DID_PKT_SEND       CVMX_FULL_DID(CVMX_OCT_DID_PKT, 2ULL)
 249 #define CVMX_OCT_DID_TAG_SWTAG      CVMX_FULL_DID(CVMX_OCT_DID_TAG, 0ULL)
 250 #define CVMX_OCT_DID_TAG_TAG1       CVMX_FULL_DID(CVMX_OCT_DID_TAG, 1ULL)
 251 #define CVMX_OCT_DID_TAG_TAG2       CVMX_FULL_DID(CVMX_OCT_DID_TAG, 2ULL)
 252 #define CVMX_OCT_DID_TAG_TAG3       CVMX_FULL_DID(CVMX_OCT_DID_TAG, 3ULL)
 253 #define CVMX_OCT_DID_TAG_NULL_RD    CVMX_FULL_DID(CVMX_OCT_DID_TAG, 4ULL)
 254 #define CVMX_OCT_DID_TAG_CSR        CVMX_FULL_DID(CVMX_OCT_DID_TAG, 7ULL)
 255 #define CVMX_OCT_DID_FAU_FAI        CVMX_FULL_DID(CVMX_OCT_DID_IOB, 0ULL)
 256 #define CVMX_OCT_DID_TIM_CSR        CVMX_FULL_DID(CVMX_OCT_DID_TIM, 0ULL)
 257 #define CVMX_OCT_DID_KEY_RW         CVMX_FULL_DID(CVMX_OCT_DID_KEY, 0ULL)
 258 #define CVMX_OCT_DID_PCI_6          CVMX_FULL_DID(CVMX_OCT_DID_PCI, 6ULL)
 259 #define CVMX_OCT_DID_MIS_BOO        CVMX_FULL_DID(CVMX_OCT_DID_MIS, 0ULL)
 260 #define CVMX_OCT_DID_PCI_RML        CVMX_FULL_DID(CVMX_OCT_DID_PCI, 0ULL)
 261 #define CVMX_OCT_DID_IPD_CSR        CVMX_FULL_DID(CVMX_OCT_DID_IPD, 7ULL)
 262 #define CVMX_OCT_DID_DFA_CSR        CVMX_FULL_DID(CVMX_OCT_DID_DFA, 7ULL)
 263 #define CVMX_OCT_DID_MIS_CSR        CVMX_FULL_DID(CVMX_OCT_DID_MIS, 7ULL)
 264 #define CVMX_OCT_DID_ZIP_CSR        CVMX_FULL_DID(CVMX_OCT_DID_ZIP, 0ULL)
 265
 266 #endif /* __CVMX_ADDRESS_H__ */