arch/mips/include/asm/netlogic/mips-extns.h

   1 /*
   2  * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
   3  * reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the NetLogic
   9  * license below:
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  *
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in
  19  *    the documentation and/or other materials provided with the
  20  *    distribution.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  29  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  30  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  31  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  32  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #ifndef _ASM_NLM_MIPS_EXTS_H
  36 #define _ASM_NLM_MIPS_EXTS_H
  37
  38 /*
  39  * XLR and XLP interrupt request and interrupt mask registers
  40  */
  41 #define read_c0_eirr()          __read_64bit_c0_register($9, 6)
  42 #define read_c0_eimr()          __read_64bit_c0_register($9, 7)
  43 #define write_c0_eirr(val)      __write_64bit_c0_register($9, 6, val)
  44
  45 /*
  46  * Writing EIMR in 32 bit is a special case, the lower 8 bit of the
  47  * EIMR is shadowed in the status register, so we cannot save and
  48  * restore status register for split read.
  49  */
  50 #define write_c0_eimr(val)                                              \
  51 do {                                                                    \
  52         if (sizeof(unsigned long) == 4) {                               \
  53                 unsigned long __flags;                                  \
  54                                                                         \
  55                 local_irq_save(__flags);                                \
  56                 __asm__ __volatile__(                                   \
  57                         ".set\tmips64\n\t"                              \
  58                         "dsll\t%L0, %L0, 32\n\t"                        \
  59                         "dsrl\t%L0, %L0, 32\n\t"                        \
  60                         "dsll\t%M0, %M0, 32\n\t"                        \
  61                         "or\t%L0, %L0, %M0\n\t"                         \
  62                         "dmtc0\t%L0, $9, 7\n\t"                         \
  63                         ".set\tmips0"                                   \
  64                         : : "r" (val));                                 \
  65                 __flags = (__flags & 0xffff00ff) | (((val) & 0xff) << 8);\
  66                 local_irq_restore(__flags);                             \
  67         } else                                                          \
  68                 __write_64bit_c0_register($9, 7, (val));                \
  69 } while (0)
  70
  71 static inline int hard_smp_processor_id(void)
  72 {
  73         return __read_32bit_c0_register($15, 1) & 0x3ff;
  74 }
  75
  76 static inline int nlm_nodeid(void)
  77 {
  78         return (__read_32bit_c0_register($15, 1) >> 5) & 0x3;
  79 }
  80
  81 static inline unsigned int nlm_core_id(void)
  82 {
  83         return (read_c0_ebase() & 0x1c) >> 2;
  84 }
  85
  86 static inline unsigned int nlm_thread_id(void)
  87 {
  88         return read_c0_ebase() & 0x3;
  89 }
  90
  91 #define __read_64bit_c2_split(source, sel)                              \
  92 ({                                                                      \
  93         unsigned long long __val;                                       \
  94         unsigned long __flags;                                          \
  95                                                                         \
  96         local_irq_save(__flags);                                        \
  97         if (sel == 0)                                                   \
  98                 __asm__ __volatile__(                                   \
  99                         ".set\tmips64\n\t"                              \
 100                         "dmfc2\t%M0, " #source "\n\t"                   \
 101                         "dsll\t%L0, %M0, 32\n\t"                        \
 102                         "dsra\t%M0, %M0, 32\n\t"                        \
 103                         "dsra\t%L0, %L0, 32\n\t"                        \
 104                         ".set\tmips0\n\t"                               \
 105                         : "=r" (__val));                                \
 106         else                                                            \
 107                 __asm__ __volatile__(                                   \
 108                         ".set\tmips64\n\t"                              \
 109                         "dmfc2\t%M0, " #source ", " #sel "\n\t"         \
 110                         "dsll\t%L0, %M0, 32\n\t"                        \
 111                         "dsra\t%M0, %M0, 32\n\t"                        \
 112                         "dsra\t%L0, %L0, 32\n\t"                        \
 113                         ".set\tmips0\n\t"                               \
 114                         : "=r" (__val));                                \
 115         local_irq_restore(__flags);                                     \
 116                                                                         \
 117         __val;                                                          \
 118 })
 119
 120 #define __write_64bit_c2_split(source, sel, val)                        \
 121 do {                                                                    \
 122         unsigned long __flags;                                          \
 123                                                                         \
 124         local_irq_save(__flags);                                        \
 125         if (sel == 0)                                                   \
 126                 __asm__ __volatile__(                                   \
 127                         ".set\tmips64\n\t"                              \
 128                         "dsll\t%L0, %L0, 32\n\t"                        \
 129                         "dsrl\t%L0, %L0, 32\n\t"                        \
 130                         "dsll\t%M0, %M0, 32\n\t"                        \
 131                         "or\t%L0, %L0, %M0\n\t"                         \
 132                         "dmtc2\t%L0, " #source "\n\t"                   \
 133                         ".set\tmips0\n\t"                               \
 134                         : : "r" (val));                                 \
 135         else                                                            \
 136                 __asm__ __volatile__(                                   \
 137                         ".set\tmips64\n\t"                              \
 138                         "dsll\t%L0, %L0, 32\n\t"                        \
 139                         "dsrl\t%L0, %L0, 32\n\t"                        \
 140                         "dsll\t%M0, %M0, 32\n\t"                        \
 141                         "or\t%L0, %L0, %M0\n\t"                         \
 142                         "dmtc2\t%L0, " #source ", " #sel "\n\t"         \
 143                         ".set\tmips0\n\t"                               \
 144                         : : "r" (val));                                 \
 145         local_irq_restore(__flags);                                     \
 146 } while (0)
 147
 148 #define __read_32bit_c2_register(source, sel)                           \
 149 ({ uint32_t __res;                                                      \
 150         if (sel == 0)                                                   \
 151                 __asm__ __volatile__(                                   \
 152                         ".set\tmips32\n\t"                              \
 153                         "mfc2\t%0, " #source "\n\t"                     \
 154                         ".set\tmips0\n\t"                               \
 155                         : "=r" (__res));                                \
 156         else                                                            \
 157                 __asm__ __volatile__(                                   \
 158                         ".set\tmips32\n\t"                              \
 159                         "mfc2\t%0, " #source ", " #sel "\n\t"           \
 160                         ".set\tmips0\n\t"                               \
 161                         : "=r" (__res));                                \
 162         __res;                                                          \
 163 })
 164
 165 #define __read_64bit_c2_register(source, sel)                           \
 166 ({ unsigned long long __res;                                            \
 167         if (sizeof(unsigned long) == 4)                                 \
 168                 __res = __read_64bit_c2_split(source, sel);             \
 169         else if (sel == 0)                                              \
 170                 __asm__ __volatile__(                                   \
 171                         ".set\tmips64\n\t"                              \
 172                         "dmfc2\t%0, " #source "\n\t"                    \
 173                         ".set\tmips0\n\t"                               \
 174                         : "=r" (__res));                                \
 175         else                                                            \
 176                 __asm__ __volatile__(                                   \
 177                         ".set\tmips64\n\t"                              \
 178                         "dmfc2\t%0, " #source ", " #sel "\n\t"          \
 179                         ".set\tmips0\n\t"                               \
 180                         : "=r" (__res));                                \
 181         __res;                                                          \
 182 })
 183
 184 #define __write_64bit_c2_register(register, sel, value)                 \
 185 do {                                                                    \
 186         if (sizeof(unsigned long) == 4)                                 \
 187                 __write_64bit_c2_split(register, sel, value);           \
 188         else if (sel == 0)                                              \
 189                 __asm__ __volatile__(                                   \
 190                         ".set\tmips64\n\t"                              \
 191                         "dmtc2\t%z0, " #register "\n\t"                 \
 192                         ".set\tmips0\n\t"                               \
 193                         : : "Jr" (value));                              \
 194         else                                                            \
 195                 __asm__ __volatile__(                                   \
 196                         ".set\tmips64\n\t"                              \
 197                         "dmtc2\t%z0, " #register ", " #sel "\n\t"       \
 198                         ".set\tmips0\n\t"                               \
 199                         : : "Jr" (value));                              \
 200 } while (0)
 201
 202 #define __write_32bit_c2_register(reg, sel, value)                      \
 203 ({                                                                      \
 204         if (sel == 0)                                                   \
 205                 __asm__ __volatile__(                                   \
 206                         ".set\tmips32\n\t"                              \
 207                         "mtc2\t%z0, " #reg "\n\t"                       \
 208                         ".set\tmips0\n\t"                               \
 209                         : : "Jr" (value));                              \
 210         else                                                            \
 211                 __asm__ __volatile__(                                   \
 212                         ".set\tmips32\n\t"                              \
 213                         "mtc2\t%z0, " #reg ", " #sel "\n\t"             \
 214                         ".set\tmips0\n\t"                               \
 215                         : : "Jr" (value));                              \
 216 })
 217
 218 #endif /*_ASM_NLM_MIPS_EXTS_H */