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418 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2005 Jakub Jermar
418 jermar 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
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 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
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 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
1784 jermar 29
/** @addtogroup sparc64
1702 cejka 30
 * @{
31
 */
32
/** @file
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 */
34
 
1784 jermar 35
#ifndef KERN_sparc64_ASM_H_
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#define KERN_sparc64_ASM_H_
418 jermar 37
 
2089 decky 38
#include <arch/arch.h>
418 jermar 39
#include <arch/types.h>
3071 decky 40
#include <typedefs.h>
2089 decky 41
#include <align.h>
650 jermar 42
#include <arch/register.h>
418 jermar 43
#include <config.h>
1885 jermar 44
#include <arch/stack.h>
418 jermar 45
 
650 jermar 46
/** Read Processor State register.
47
 *
48
 * @return Value of PSTATE register.
49
 */
1780 jermar 50
static inline uint64_t pstate_read(void)
650 jermar 51
{
1780 jermar 52
    uint64_t v;
650 jermar 53
 
2082 decky 54
    asm volatile ("rdpr %%pstate, %0\n" : "=r" (v));
650 jermar 55
 
56
    return v;
57
}
58
 
59
/** Write Processor State register.
60
 *
1708 jermar 61
 * @param v New value of PSTATE register.
650 jermar 62
 */
1780 jermar 63
static inline void pstate_write(uint64_t v)
650 jermar 64
{
2082 decky 65
    asm volatile ("wrpr %0, %1, %%pstate\n" : : "r" (v), "i" (0));
650 jermar 66
}
67
 
658 jermar 68
/** Read TICK_compare Register.
69
 *
70
 * @return Value of TICK_comapre register.
71
 */
1780 jermar 72
static inline uint64_t tick_compare_read(void)
658 jermar 73
{
1780 jermar 74
    uint64_t v;
658 jermar 75
 
2082 decky 76
    asm volatile ("rd %%tick_cmpr, %0\n" : "=r" (v));
658 jermar 77
 
78
    return v;
79
}
650 jermar 80
 
658 jermar 81
/** Write TICK_compare Register.
82
 *
1708 jermar 83
 * @param v New value of TICK_comapre register.
658 jermar 84
 */
1780 jermar 85
static inline void tick_compare_write(uint64_t v)
658 jermar 86
{
2082 decky 87
    asm volatile ("wr %0, %1, %%tick_cmpr\n" : : "r" (v), "i" (0));
658 jermar 88
}
89
 
90
/** Read TICK Register.
91
 *
92
 * @return Value of TICK register.
93
 */
1780 jermar 94
static inline uint64_t tick_read(void)
658 jermar 95
{
1780 jermar 96
    uint64_t v;
658 jermar 97
 
2082 decky 98
    asm volatile ("rdpr %%tick, %0\n" : "=r" (v));
658 jermar 99
 
100
    return v;
101
}
102
 
103
/** Write TICK Register.
104
 *
1708 jermar 105
 * @param v New value of TICK register.
658 jermar 106
 */
1780 jermar 107
static inline void tick_write(uint64_t v)
658 jermar 108
{
2082 decky 109
    asm volatile ("wrpr %0, %1, %%tick\n" : : "r" (v), "i" (0));
658 jermar 110
}
111
 
1882 jermar 112
/** Read FPRS Register.
113
 *
114
 * @return Value of FPRS register.
115
 */
116
static inline uint64_t fprs_read(void)
117
{
118
    uint64_t v;
119
 
2082 decky 120
    asm volatile ("rd %%fprs, %0\n" : "=r" (v));
1882 jermar 121
 
122
    return v;
123
}
124
 
125
/** Write FPRS Register.
126
 *
127
 * @param v New value of FPRS register.
128
 */
129
static inline void fprs_write(uint64_t v)
130
{
2082 decky 131
    asm volatile ("wr %0, %1, %%fprs\n" : : "r" (v), "i" (0));
1882 jermar 132
}
133
 
664 jermar 134
/** Read SOFTINT Register.
135
 *
136
 * @return Value of SOFTINT register.
137
 */
1780 jermar 138
static inline uint64_t softint_read(void)
664 jermar 139
{
1780 jermar 140
    uint64_t v;
658 jermar 141
 
2082 decky 142
    asm volatile ("rd %%softint, %0\n" : "=r" (v));
664 jermar 143
 
144
    return v;
145
}
146
 
147
/** Write SOFTINT Register.
148
 *
1708 jermar 149
 * @param v New value of SOFTINT register.
664 jermar 150
 */
1780 jermar 151
static inline void softint_write(uint64_t v)
664 jermar 152
{
2082 decky 153
    asm volatile ("wr %0, %1, %%softint\n" : : "r" (v), "i" (0));
664 jermar 154
}
155
 
665 jermar 156
/** Write CLEAR_SOFTINT Register.
157
 *
158
 * Bits set in CLEAR_SOFTINT register will be cleared in SOFTINT register.
159
 *
1708 jermar 160
 * @param v New value of CLEAR_SOFTINT register.
665 jermar 161
 */
1780 jermar 162
static inline void clear_softint_write(uint64_t v)
665 jermar 163
{
2082 decky 164
    asm volatile ("wr %0, %1, %%clear_softint\n" : : "r" (v), "i" (0));
665 jermar 165
}
166
 
1849 jermar 167
/** Write SET_SOFTINT Register.
168
 *
169
 * Bits set in SET_SOFTINT register will be set in SOFTINT register.
170
 *
171
 * @param v New value of SET_SOFTINT register.
172
 */
173
static inline void set_softint_write(uint64_t v)
174
{
2082 decky 175
    asm volatile ("wr %0, %1, %%set_softint\n" : : "r" (v), "i" (0));
1849 jermar 176
}
177
 
418 jermar 178
/** Enable interrupts.
179
 *
180
 * Enable interrupts and return previous
181
 * value of IPL.
182
 *
183
 * @return Old interrupt priority level.
184
 */
185
static inline ipl_t interrupts_enable(void) {
650 jermar 186
    pstate_reg_t pstate;
1780 jermar 187
    uint64_t value;
650 jermar 188
 
189
    value = pstate_read();
190
    pstate.value = value;
191
    pstate.ie = true;
192
    pstate_write(pstate.value);
193
 
194
    return (ipl_t) value;
418 jermar 195
}
196
 
197
/** Disable interrupts.
198
 *
199
 * Disable interrupts and return previous
200
 * value of IPL.
201
 *
202
 * @return Old interrupt priority level.
203
 */
204
static inline ipl_t interrupts_disable(void) {
650 jermar 205
    pstate_reg_t pstate;
1780 jermar 206
    uint64_t value;
650 jermar 207
 
208
    value = pstate_read();
209
    pstate.value = value;
210
    pstate.ie = false;
211
    pstate_write(pstate.value);
212
 
213
    return (ipl_t) value;
418 jermar 214
}
215
 
216
/** Restore interrupt priority level.
217
 *
218
 * Restore IPL.
219
 *
220
 * @param ipl Saved interrupt priority level.
221
 */
222
static inline void interrupts_restore(ipl_t ipl) {
650 jermar 223
    pstate_reg_t pstate;
224
 
225
    pstate.value = pstate_read();
226
    pstate.ie = ((pstate_reg_t) ipl).ie;
227
    pstate_write(pstate.value);
418 jermar 228
}
229
 
230
/** Return interrupt priority level.
231
 *
232
 * Return IPL.
233
 *
234
 * @return Current interrupt priority level.
235
 */
236
static inline ipl_t interrupts_read(void) {
650 jermar 237
    return (ipl_t) pstate_read();
418 jermar 238
}
239
 
240
/** Return base address of current stack.
241
 *
242
 * Return the base address of the current stack.
243
 * The stack is assumed to be STACK_SIZE bytes long.
244
 * The stack must start on page boundary.
245
 */
1780 jermar 246
static inline uintptr_t get_stack_base(void)
418 jermar 247
{
1885 jermar 248
    uintptr_t unbiased_sp;
426 jermar 249
 
2082 decky 250
    asm volatile ("add %%sp, %1, %0\n" : "=r" (unbiased_sp) : "i" (STACK_BIAS));
426 jermar 251
 
1885 jermar 252
    return ALIGN_DOWN(unbiased_sp, STACK_SIZE);
418 jermar 253
}
254
 
640 jermar 255
/** Read Version Register.
256
 *
257
 * @return Value of VER register.
258
 */
1780 jermar 259
static inline uint64_t ver_read(void)
640 jermar 260
{
1780 jermar 261
    uint64_t v;
640 jermar 262
 
2082 decky 263
    asm volatile ("rdpr %%ver, %0\n" : "=r" (v));
640 jermar 264
 
265
    return v;
266
}
267
 
2068 jermar 268
/** Read Trap Program Counter register.
529 jermar 269
 *
2068 jermar 270
 * @return Current value in TPC.
529 jermar 271
 */
2068 jermar 272
static inline uint64_t tpc_read(void)
529 jermar 273
{
1780 jermar 274
    uint64_t v;
529 jermar 275
 
2082 decky 276
    asm volatile ("rdpr %%tpc, %0\n" : "=r" (v));
529 jermar 277
 
278
    return v;
279
}
280
 
2068 jermar 281
/** Read Trap Level register.
873 jermar 282
 *
2068 jermar 283
 * @return Current value in TL.
873 jermar 284
 */
2068 jermar 285
static inline uint64_t tl_read(void)
873 jermar 286
{
1780 jermar 287
    uint64_t v;
873 jermar 288
 
2082 decky 289
    asm volatile ("rdpr %%tl, %0\n" : "=r" (v));
873 jermar 290
 
291
    return v;
292
}
293
 
2068 jermar 294
/** Read Trap Base Address register.
883 jermar 295
 *
2068 jermar 296
 * @return Current value in TBA.
883 jermar 297
 */
2068 jermar 298
static inline uint64_t tba_read(void)
883 jermar 299
{
1780 jermar 300
    uint64_t v;
883 jermar 301
 
2082 decky 302
    asm volatile ("rdpr %%tba, %0\n" : "=r" (v));
883 jermar 303
 
304
    return v;
305
}
873 jermar 306
 
529 jermar 307
/** Write Trap Base Address register.
308
 *
1708 jermar 309
 * @param v New value of TBA.
529 jermar 310
 */
1780 jermar 311
static inline void tba_write(uint64_t v)
529 jermar 312
{
2082 decky 313
    asm volatile ("wrpr %0, %1, %%tba\n" : : "r" (v), "i" (0));
529 jermar 314
}
315
 
1780 jermar 316
/** Load uint64_t from alternate space.
569 jermar 317
 *
318
 * @param asi ASI determining the alternate space.
319
 * @param va Virtual address within the ASI.
320
 *
321
 * @return Value read from the virtual address in the specified address space.
322
 */
1780 jermar 323
static inline uint64_t asi_u64_read(asi_t asi, uintptr_t va)
569 jermar 324
{
1780 jermar 325
    uint64_t v;
569 jermar 326
 
2082 decky 327
    asm volatile ("ldxa [%1] %2, %0\n" : "=r" (v) : "r" (va), "i" ((unsigned) asi));
569 jermar 328
 
329
    return v;
330
}
529 jermar 331
 
1780 jermar 332
/** Store uint64_t to alternate space.
569 jermar 333
 *
334
 * @param asi ASI determining the alternate space.
335
 * @param va Virtual address within the ASI.
336
 * @param v Value to be written.
337
 */
1780 jermar 338
static inline void asi_u64_write(asi_t asi, uintptr_t va, uint64_t v)
569 jermar 339
{
2082 decky 340
    asm volatile ("stxa %0, [%1] %2\n" : :  "r" (v), "r" (va), "i" ((unsigned) asi) : "memory");
569 jermar 341
}
342
 
1855 jermar 343
/** Flush all valid register windows to memory. */
344
static inline void flushw(void)
345
{
2082 decky 346
    asm volatile ("flushw\n");
1855 jermar 347
}
348
 
1865 jermar 349
/** Switch to nucleus by setting TL to 1. */
350
static inline void nucleus_enter(void)
351
{
2082 decky 352
    asm volatile ("wrpr %g0, 1, %tl\n");
1865 jermar 353
}
354
 
355
/** Switch from nucleus by setting TL to 0. */
356
static inline void nucleus_leave(void)
357
{
2082 decky 358
    asm volatile ("wrpr %g0, %g0, %tl\n");
1865 jermar 359
}
360
 
1899 jermar 361
/** Read UPA_CONFIG register.
362
 *
363
 * @return Value of the UPA_CONFIG register.
364
 */
365
static inline uint64_t upa_config_read(void)
366
{
367
    return asi_u64_read(ASI_UPA_CONFIG, 0);
368
}
369
 
1856 jermar 370
extern void cpu_halt(void);
371
extern void cpu_sleep(void);
1881 jermar 372
extern void asm_delay_loop(const uint32_t usec);
418 jermar 373
 
1856 jermar 374
extern uint64_t read_from_ag_g7(void);
375
extern void write_to_ag_g6(uint64_t val);
376
extern void write_to_ag_g7(uint64_t val);
377
extern void write_to_ig_g6(uint64_t val);
378
 
1864 jermar 379
extern void switch_to_userspace(uint64_t pc, uint64_t sp, uint64_t uarg);
1860 jermar 380
 
418 jermar 381
#endif
1702 cejka 382
 
1784 jermar 383
/** @}
1702 cejka 384
 */