arch/hexagon/include/asm/hexagon_vm.h

   1 /*
   2  * Declarations for to Hexagon Virtal Machine.
   3  *
   4  * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 and
   8  * only version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  * 02110-1301, USA.
  19  */
  20
  21 #ifndef ASM_HEXAGON_VM_H
  22 #define ASM_HEXAGON_VM_H
  23
  24 /*
  25  * In principle, a Linux kernel for the VM could
  26  * selectively define the virtual instructions
  27  * as inline assembler macros, but for a first pass,
  28  * we'll use subroutines for both the VM and the native
  29  * kernels.  It's costing a subroutine call/return,
  30  * but it makes for a single set of entry points
  31  * for tracing/debugging.
  32  */
  33
  34 /*
  35  * Lets make this stuff visible only if configured,
  36  * so we can unconditionally include the file.
  37  */
  38
  39 #ifndef __ASSEMBLY__
  40
  41 enum VM_CACHE_OPS {
  42         ickill,
  43         dckill,
  44         l2kill,
  45         dccleaninva,
  46         icinva,
  47         idsync,
  48         fetch_cfg
  49 };
  50
  51 enum VM_INT_OPS {
  52         nop,
  53         globen,
  54         globdis,
  55         locen,
  56         locdis,
  57         affinity,
  58         get,
  59         peek,
  60         status,
  61         post,
  62         clear
  63 };
  64
  65 extern void _K_VM_event_vector(void);
  66
  67 void __vmrte(void);
  68 long __vmsetvec(void *);
  69 long __vmsetie(long);
  70 long __vmgetie(void);
  71 long __vmintop(enum VM_INT_OPS, long, long, long, long);
  72 long __vmclrmap(void *, unsigned long);
  73 long __vmnewmap(void *);
  74 long __vmcache(enum VM_CACHE_OPS op, unsigned long addr, unsigned long len);
  75 unsigned long long __vmgettime(void);
  76 long __vmsettime(unsigned long long);
  77 long __vmstart(void *, void *);
  78 void __vmstop(void);
  79 long __vmwait(void);
  80 void __vmyield(void);
  81 long __vmvpid(void);
  82
  83 static inline long __vmcache_ickill(void)
  84 {
  85         return __vmcache(ickill, 0, 0);
  86 }
  87
  88 static inline long __vmcache_dckill(void)
  89 {
  90         return __vmcache(dckill, 0, 0);
  91 }
  92
  93 static inline long __vmcache_l2kill(void)
  94 {
  95         return __vmcache(l2kill, 0, 0);
  96 }
  97
  98 static inline long __vmcache_dccleaninva(unsigned long addr, unsigned long len)
  99 {
 100         return __vmcache(dccleaninva, addr, len);
 101 }
 102
 103 static inline long __vmcache_icinva(unsigned long addr, unsigned long len)
 104 {
 105         return __vmcache(icinva, addr, len);
 106 }
 107
 108 static inline long __vmcache_idsync(unsigned long addr,
 109                                            unsigned long len)
 110 {
 111         return __vmcache(idsync, addr, len);
 112 }
 113
 114 static inline long __vmcache_fetch_cfg(unsigned long val)
 115 {
 116         return __vmcache(fetch_cfg, val, 0);
 117 }
 118
 119 /* interrupt operations  */
 120
 121 static inline long __vmintop_nop(void)
 122 {
 123         return __vmintop(nop, 0, 0, 0, 0);
 124 }
 125
 126 static inline long __vmintop_globen(long i)
 127 {
 128         return __vmintop(globen, i, 0, 0, 0);
 129 }
 130
 131 static inline long __vmintop_globdis(long i)
 132 {
 133         return __vmintop(globdis, i, 0, 0, 0);
 134 }
 135
 136 static inline long __vmintop_locen(long i)
 137 {
 138         return __vmintop(locen, i, 0, 0, 0);
 139 }
 140
 141 static inline long __vmintop_locdis(long i)
 142 {
 143         return __vmintop(locdis, i, 0, 0, 0);
 144 }
 145
 146 static inline long __vmintop_affinity(long i, long cpu)
 147 {
 148         return __vmintop(locdis, i, cpu, 0, 0);
 149 }
 150
 151 static inline long __vmintop_get(void)
 152 {
 153         return __vmintop(get, 0, 0, 0, 0);
 154 }
 155
 156 static inline long __vmintop_peek(void)
 157 {
 158         return __vmintop(peek, 0, 0, 0, 0);
 159 }
 160
 161 static inline long __vmintop_status(long i)
 162 {
 163         return __vmintop(status, i, 0, 0, 0);
 164 }
 165
 166 static inline long __vmintop_post(long i)
 167 {
 168         return __vmintop(post, i, 0, 0, 0);
 169 }
 170
 171 static inline long __vmintop_clear(long i)
 172 {
 173         return __vmintop(clear, i, 0, 0, 0);
 174 }
 175
 176 #else /* Only assembly code should reference these */
 177
 178 #define HVM_TRAP1_VMRTE                 1
 179 #define HVM_TRAP1_VMSETVEC              2
 180 #define HVM_TRAP1_VMSETIE               3
 181 #define HVM_TRAP1_VMGETIE               4
 182 #define HVM_TRAP1_VMINTOP               5
 183 #define HVM_TRAP1_VMCLRMAP              10
 184 #define HVM_TRAP1_VMNEWMAP              11
 185 #define HVM_TRAP1_FORMERLY_VMWIRE       12
 186 #define HVM_TRAP1_VMCACHE               13
 187 #define HVM_TRAP1_VMGETTIME             14
 188 #define HVM_TRAP1_VMSETTIME             15
 189 #define HVM_TRAP1_VMWAIT                16
 190 #define HVM_TRAP1_VMYIELD               17
 191 #define HVM_TRAP1_VMSTART               18
 192 #define HVM_TRAP1_VMSTOP                19
 193 #define HVM_TRAP1_VMVPID                20
 194 #define HVM_TRAP1_VMSETREGS             21
 195 #define HVM_TRAP1_VMGETREGS             22
 196
 197 #endif /* __ASSEMBLY__ */
 198
 199 /*
 200  * Constants for virtual instruction parameters and return values
 201  */
 202
 203 /* vmsetie arguments */
 204
 205 #define VM_INT_DISABLE  0
 206 #define VM_INT_ENABLE   1
 207
 208 /* vmsetimask arguments */
 209
 210 #define VM_INT_UNMASK   0
 211 #define VM_INT_MASK     1
 212
 213 #define VM_NEWMAP_TYPE_LINEAR   0
 214 #define VM_NEWMAP_TYPE_PGTABLES 1
 215
 216
 217 /*
 218  * Event Record definitions useful to both C and Assembler
 219  */
 220
 221 /* VMEST Layout */
 222
 223 #define HVM_VMEST_UM_SFT        31
 224 #define HVM_VMEST_UM_MSK        1
 225 #define HVM_VMEST_IE_SFT        30
 226 #define HVM_VMEST_IE_MSK        1
 227 #define HVM_VMEST_EVENTNUM_SFT  16
 228 #define HVM_VMEST_EVENTNUM_MSK  0xff
 229 #define HVM_VMEST_CAUSE_SFT     0
 230 #define HVM_VMEST_CAUSE_MSK     0xffff
 231
 232 /*
 233  * The initial program gets to find a system environment descriptor
 234  * on its stack when it begins exection. The first word is a version
 235  * code to indicate what is there.  Zero means nothing more.
 236  */
 237
 238 #define HEXAGON_VM_SED_NULL     0
 239
 240 /*
 241  * Event numbers for vector binding
 242  */
 243
 244 #define HVM_EV_RESET            0
 245 #define HVM_EV_MACHCHECK        1
 246 #define HVM_EV_GENEX            2
 247 #define HVM_EV_TRAP             8
 248 #define HVM_EV_INTR             15
 249 /* These shoud be nuked as soon as we know the VM is up to spec v0.1.1 */
 250 #define HVM_EV_INTR_0           16
 251 #define HVM_MAX_INTR            240
 252
 253 /*
 254  * Cause values for General Exception
 255  */
 256
 257 #define HVM_GE_C_BUS    0x01
 258 #define HVM_GE_C_XPROT  0x11
 259 #define HVM_GE_C_XUSER  0x14
 260 #define HVM_GE_C_INVI   0x15
 261 #define HVM_GE_C_PRIVI  0x1B
 262 #define HVM_GE_C_XMAL   0x1C
 263 #define HVM_GE_C_RMAL   0x20
 264 #define HVM_GE_C_WMAL   0x21
 265 #define HVM_GE_C_RPROT  0x22
 266 #define HVM_GE_C_WPROT  0x23
 267 #define HVM_GE_C_RUSER  0x24
 268 #define HVM_GE_C_WUSER  0x25
 269 #define HVM_GE_C_CACHE  0x28
 270
 271 /*
 272  * Cause codes for Machine Check
 273  */
 274
 275 #define HVM_MCHK_C_DOWN         0x00
 276 #define HVM_MCHK_C_BADSP        0x01
 277 #define HVM_MCHK_C_BADEX        0x02
 278 #define HVM_MCHK_C_BADPT        0x03
 279 #define HVM_MCHK_C_REGWR        0x29
 280
 281 #endif