kernel/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 /*
  42  * NOTE: Do not save/restore flags around write_c0_eimr().
  43  * On non-R2 platforms the flags has part of EIMR that is shadowed in STATUS
  44  * register. Restoring flags will overwrite the lower 8 bits of EIMR.
  45  *
  46  * Call with interrupts disabled.
  47  */
  48 #define write_c0_eimr(val)                                              \
  49 do {                                                                    \
  50         if (sizeof(unsigned long) == 4) {                               \
  51                 __asm__ __volatile__(                                   \
  52                         ".set\tmips64\n\t"                              \
  53                         "dsll\t%L0, %L0, 32\n\t"                        \
  54                         "dsrl\t%L0, %L0, 32\n\t"                        \
  55                         "dsll\t%M0, %M0, 32\n\t"                        \
  56                         "or\t%L0, %L0, %M0\n\t"                         \
  57                         "dmtc0\t%L0, $9, 7\n\t"                         \
  58                         ".set\tmips0"                                   \
  59                         : : "r" (val));                                 \
  60         } else                                                          \
  61                 __write_64bit_c0_register($9, 7, (val));                \
  62 } while (0)
  63
  64 /*
  65  * Handling the 64 bit EIMR and EIRR registers in 32-bit mode with
  66  * standard functions will be very inefficient. This provides
  67  * optimized functions for the normal operations on the registers.
  68  *
  69  * Call with interrupts disabled.
  70  */
  71 static inline void ack_c0_eirr(int irq)
  72 {
  73         __asm__ __volatile__(
  74                 ".set   push\n\t"
  75                 ".set   mips64\n\t"
  76                 ".set   noat\n\t"
  77                 "li     $1, 1\n\t"
  78                 "dsllv  $1, $1, %0\n\t"
  79                 "dmtc0  $1, $9, 6\n\t"
  80                 ".set   pop"
  81                 : : "r" (irq));
  82 }
  83
  84 static inline void set_c0_eimr(int irq)
  85 {
  86         __asm__ __volatile__(
  87                 ".set   push\n\t"
  88                 ".set   mips64\n\t"
  89                 ".set   noat\n\t"
  90                 "li     $1, 1\n\t"
  91                 "dsllv  %0, $1, %0\n\t"
  92                 "dmfc0  $1, $9, 7\n\t"
  93                 "or     $1, %0\n\t"
  94                 "dmtc0  $1, $9, 7\n\t"
  95                 ".set   pop"
  96                 : "+r" (irq));
  97 }
  98
  99 static inline void clear_c0_eimr(int irq)
 100 {
 101         __asm__ __volatile__(
 102                 ".set   push\n\t"
 103                 ".set   mips64\n\t"
 104                 ".set   noat\n\t"
 105                 "li     $1, 1\n\t"
 106                 "dsllv  %0, $1, %0\n\t"
 107                 "dmfc0  $1, $9, 7\n\t"
 108                 "or     $1, %0\n\t"
 109                 "xor    $1, %0\n\t"
 110                 "dmtc0  $1, $9, 7\n\t"
 111                 ".set   pop"
 112                 : "+r" (irq));
 113 }
 114
 115 /*
 116  * Read c0 eimr and c0 eirr, do AND of the two values, the result is
 117  * the interrupts which are raised and are not masked.
 118  */
 119 static inline uint64_t read_c0_eirr_and_eimr(void)
 120 {
 121         uint64_t val;
 122
 123 #ifdef CONFIG_64BIT
 124         val = __read_64bit_c0_register($9, 6) & __read_64bit_c0_register($9, 7);
 125 #else
 126         __asm__ __volatile__(
 127                 ".set   push\n\t"
 128                 ".set   mips64\n\t"
 129                 ".set   noat\n\t"
 130                 "dmfc0  %M0, $9, 6\n\t"
 131                 "dmfc0  %L0, $9, 7\n\t"
 132                 "and    %M0, %L0\n\t"
 133                 "dsll   %L0, %M0, 32\n\t"
 134                 "dsra   %M0, %M0, 32\n\t"
 135                 "dsra   %L0, %L0, 32\n\t"
 136                 ".set   pop"
 137                 : "=r" (val));
 138 #endif
 139         return val;
 140 }
 141
 142 static inline int hard_smp_processor_id(void)
 143 {
 144         return __read_32bit_c0_register($15, 1) & 0x3ff;
 145 }
 146
 147 static inline int nlm_nodeid(void)
 148 {
 149         uint32_t prid = read_c0_prid() & PRID_IMP_MASK;
 150
 151         if ((prid == PRID_IMP_NETLOGIC_XLP9XX) ||
 152                         (prid == PRID_IMP_NETLOGIC_XLP5XX))
 153                 return (__read_32bit_c0_register($15, 1) >> 7) & 0x7;
 154         else
 155                 return (__read_32bit_c0_register($15, 1) >> 5) & 0x3;
 156 }
 157
 158 static inline unsigned int nlm_core_id(void)
 159 {
 160         uint32_t prid = read_c0_prid() & PRID_IMP_MASK;
 161
 162         if ((prid == PRID_IMP_NETLOGIC_XLP9XX) ||
 163                         (prid == PRID_IMP_NETLOGIC_XLP5XX))
 164                 return (read_c0_ebase() & 0x7c) >> 2;
 165         else
 166                 return (read_c0_ebase() & 0x1c) >> 2;
 167 }
 168
 169 static inline unsigned int nlm_thread_id(void)
 170 {
 171         return read_c0_ebase() & 0x3;
 172 }
 173
 174 #define __read_64bit_c2_split(source, sel)                              \
 175 ({                                                                      \
 176         unsigned long long __val;                                       \
 177         unsigned long __flags;                                          \
 178                                                                         \
 179         local_irq_save(__flags);                                        \
 180         if (sel == 0)                                                   \
 181                 __asm__ __volatile__(                                   \
 182                         ".set\tmips64\n\t"                              \
 183                         "dmfc2\t%M0, " #source "\n\t"                   \
 184                         "dsll\t%L0, %M0, 32\n\t"                        \
 185                         "dsra\t%M0, %M0, 32\n\t"                        \
 186                         "dsra\t%L0, %L0, 32\n\t"                        \
 187                         ".set\tmips0\n\t"                               \
 188                         : "=r" (__val));                                \
 189         else                                                            \
 190                 __asm__ __volatile__(                                   \
 191                         ".set\tmips64\n\t"                              \
 192                         "dmfc2\t%M0, " #source ", " #sel "\n\t"         \
 193                         "dsll\t%L0, %M0, 32\n\t"                        \
 194                         "dsra\t%M0, %M0, 32\n\t"                        \
 195                         "dsra\t%L0, %L0, 32\n\t"                        \
 196                         ".set\tmips0\n\t"                               \
 197                         : "=r" (__val));                                \
 198         local_irq_restore(__flags);                                     \
 199                                                                         \
 200         __val;                                                          \
 201 })
 202
 203 #define __write_64bit_c2_split(source, sel, val)                        \
 204 do {                                                                    \
 205         unsigned long __flags;                                          \
 206                                                                         \
 207         local_irq_save(__flags);                                        \
 208         if (sel == 0)                                                   \
 209                 __asm__ __volatile__(                                   \
 210                         ".set\tmips64\n\t"                              \
 211                         "dsll\t%L0, %L0, 32\n\t"                        \
 212                         "dsrl\t%L0, %L0, 32\n\t"                        \
 213                         "dsll\t%M0, %M0, 32\n\t"                        \
 214                         "or\t%L0, %L0, %M0\n\t"                         \
 215                         "dmtc2\t%L0, " #source "\n\t"                   \
 216                         ".set\tmips0\n\t"                               \
 217                         : : "r" (val));                                 \
 218         else                                                            \
 219                 __asm__ __volatile__(                                   \
 220                         ".set\tmips64\n\t"                              \
 221                         "dsll\t%L0, %L0, 32\n\t"                        \
 222                         "dsrl\t%L0, %L0, 32\n\t"                        \
 223                         "dsll\t%M0, %M0, 32\n\t"                        \
 224                         "or\t%L0, %L0, %M0\n\t"                         \
 225                         "dmtc2\t%L0, " #source ", " #sel "\n\t"         \
 226                         ".set\tmips0\n\t"                               \
 227                         : : "r" (val));                                 \
 228         local_irq_restore(__flags);                                     \
 229 } while (0)
 230
 231 #define __read_32bit_c2_register(source, sel)                           \
 232 ({ uint32_t __res;                                                      \
 233         if (sel == 0)                                                   \
 234                 __asm__ __volatile__(                                   \
 235                         ".set\tmips32\n\t"                              \
 236                         "mfc2\t%0, " #source "\n\t"                     \
 237                         ".set\tmips0\n\t"                               \
 238                         : "=r" (__res));                                \
 239         else                                                            \
 240                 __asm__ __volatile__(                                   \
 241                         ".set\tmips32\n\t"                              \
 242                         "mfc2\t%0, " #source ", " #sel "\n\t"           \
 243                         ".set\tmips0\n\t"                               \
 244                         : "=r" (__res));                                \
 245         __res;                                                          \
 246 })
 247
 248 #define __read_64bit_c2_register(source, sel)                           \
 249 ({ unsigned long long __res;                                            \
 250         if (sizeof(unsigned long) == 4)                                 \
 251                 __res = __read_64bit_c2_split(source, sel);             \
 252         else if (sel == 0)                                              \
 253                 __asm__ __volatile__(                                   \
 254                         ".set\tmips64\n\t"                              \
 255                         "dmfc2\t%0, " #source "\n\t"                    \
 256                         ".set\tmips0\n\t"                               \
 257                         : "=r" (__res));                                \
 258         else                                                            \
 259                 __asm__ __volatile__(                                   \
 260                         ".set\tmips64\n\t"                              \
 261                         "dmfc2\t%0, " #source ", " #sel "\n\t"          \
 262                         ".set\tmips0\n\t"                               \
 263                         : "=r" (__res));                                \
 264         __res;                                                          \
 265 })
 266
 267 #define __write_64bit_c2_register(register, sel, value)                 \
 268 do {                                                                    \
 269         if (sizeof(unsigned long) == 4)                                 \
 270                 __write_64bit_c2_split(register, sel, value);           \
 271         else if (sel == 0)                                              \
 272                 __asm__ __volatile__(                                   \
 273                         ".set\tmips64\n\t"                              \
 274                         "dmtc2\t%z0, " #register "\n\t"                 \
 275                         ".set\tmips0\n\t"                               \
 276                         : : "Jr" (value));                              \
 277         else                                                            \
 278                 __asm__ __volatile__(                                   \
 279                         ".set\tmips64\n\t"                              \
 280                         "dmtc2\t%z0, " #register ", " #sel "\n\t"       \
 281                         ".set\tmips0\n\t"                               \
 282                         : : "Jr" (value));                              \
 283 } while (0)
 284
 285 #define __write_32bit_c2_register(reg, sel, value)                      \
 286 ({                                                                      \
 287         if (sel == 0)                                                   \
 288                 __asm__ __volatile__(                                   \
 289                         ".set\tmips32\n\t"                              \
 290                         "mtc2\t%z0, " #reg "\n\t"                       \
 291                         ".set\tmips0\n\t"                               \
 292                         : : "Jr" (value));                              \
 293         else                                                            \
 294                 __asm__ __volatile__(                                   \
 295                         ".set\tmips32\n\t"                              \
 296                         "mtc2\t%z0, " #reg ", " #sel "\n\t"             \
 297                         ".set\tmips0\n\t"                               \
 298                         : : "Jr" (value));                              \
 299 })
 300
 301 #endif /*_ASM_NLM_MIPS_EXTS_H */