xref: /illumos-kvm-cmd/target-alpha/cpu.h (revision 68396ea9)
1 /*
2  *  Alpha emulation cpu definitions for qemu.
3  *
4  *  Copyright (c) 2007 Jocelyn Mayer
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 #if !defined (__CPU_ALPHA_H__)
21 #define __CPU_ALPHA_H__
22 
23 #include "config.h"
24 
25 #define TARGET_LONG_BITS 64
26 
27 #define CPUState struct CPUAlphaState
28 
29 #include "cpu-defs.h"
30 
31 #include <setjmp.h>
32 
33 #include "softfloat.h"
34 
35 #define TARGET_HAS_ICE 1
36 
37 #define ELF_MACHINE     EM_ALPHA
38 
39 #define ICACHE_LINE_SIZE 32
40 #define DCACHE_LINE_SIZE 32
41 
42 #define TARGET_PAGE_BITS 13
43 
44 /* ??? EV4 has 34 phys addr bits, EV5 has 40, EV6 has 44.  */
45 #define TARGET_PHYS_ADDR_SPACE_BITS	44
46 #define TARGET_VIRT_ADDR_SPACE_BITS	(30 + TARGET_PAGE_BITS)
47 
48 /* Alpha major type */
49 enum {
50     ALPHA_EV3  = 1,
51     ALPHA_EV4  = 2,
52     ALPHA_SIM  = 3,
53     ALPHA_LCA  = 4,
54     ALPHA_EV5  = 5, /* 21164 */
55     ALPHA_EV45 = 6, /* 21064A */
56     ALPHA_EV56 = 7, /* 21164A */
57 };
58 
59 /* EV4 minor type */
60 enum {
61     ALPHA_EV4_2 = 0,
62     ALPHA_EV4_3 = 1,
63 };
64 
65 /* LCA minor type */
66 enum {
67     ALPHA_LCA_1 = 1, /* 21066 */
68     ALPHA_LCA_2 = 2, /* 20166 */
69     ALPHA_LCA_3 = 3, /* 21068 */
70     ALPHA_LCA_4 = 4, /* 21068 */
71     ALPHA_LCA_5 = 5, /* 21066A */
72     ALPHA_LCA_6 = 6, /* 21068A */
73 };
74 
75 /* EV5 minor type */
76 enum {
77     ALPHA_EV5_1 = 1, /* Rev BA, CA */
78     ALPHA_EV5_2 = 2, /* Rev DA, EA */
79     ALPHA_EV5_3 = 3, /* Pass 3 */
80     ALPHA_EV5_4 = 4, /* Pass 3.2 */
81     ALPHA_EV5_5 = 5, /* Pass 4 */
82 };
83 
84 /* EV45 minor type */
85 enum {
86     ALPHA_EV45_1 = 1, /* Pass 1 */
87     ALPHA_EV45_2 = 2, /* Pass 1.1 */
88     ALPHA_EV45_3 = 3, /* Pass 2 */
89 };
90 
91 /* EV56 minor type */
92 enum {
93     ALPHA_EV56_1 = 1, /* Pass 1 */
94     ALPHA_EV56_2 = 2, /* Pass 2 */
95 };
96 
97 enum {
98     IMPLVER_2106x = 0, /* EV4, EV45 & LCA45 */
99     IMPLVER_21164 = 1, /* EV5, EV56 & PCA45 */
100     IMPLVER_21264 = 2, /* EV6, EV67 & EV68x */
101     IMPLVER_21364 = 3, /* EV7 & EV79 */
102 };
103 
104 enum {
105     AMASK_BWX      = 0x00000001,
106     AMASK_FIX      = 0x00000002,
107     AMASK_CIX      = 0x00000004,
108     AMASK_MVI      = 0x00000100,
109     AMASK_TRAP     = 0x00000200,
110     AMASK_PREFETCH = 0x00001000,
111 };
112 
113 enum {
114     VAX_ROUND_NORMAL = 0,
115     VAX_ROUND_CHOPPED,
116 };
117 
118 enum {
119     IEEE_ROUND_NORMAL = 0,
120     IEEE_ROUND_DYNAMIC,
121     IEEE_ROUND_PLUS,
122     IEEE_ROUND_MINUS,
123     IEEE_ROUND_CHOPPED,
124 };
125 
126 /* IEEE floating-point operations encoding */
127 /* Trap mode */
128 enum {
129     FP_TRAP_I   = 0x0,
130     FP_TRAP_U   = 0x1,
131     FP_TRAP_S  = 0x4,
132     FP_TRAP_SU  = 0x5,
133     FP_TRAP_SUI = 0x7,
134 };
135 
136 /* Rounding mode */
137 enum {
138     FP_ROUND_CHOPPED = 0x0,
139     FP_ROUND_MINUS   = 0x1,
140     FP_ROUND_NORMAL  = 0x2,
141     FP_ROUND_DYNAMIC = 0x3,
142 };
143 
144 /* FPCR bits */
145 #define FPCR_SUM		(1ULL << 63)
146 #define FPCR_INED		(1ULL << 62)
147 #define FPCR_UNFD		(1ULL << 61)
148 #define FPCR_UNDZ		(1ULL << 60)
149 #define FPCR_DYN_SHIFT		58
150 #define FPCR_DYN_CHOPPED	(0ULL << FPCR_DYN_SHIFT)
151 #define FPCR_DYN_MINUS		(1ULL << FPCR_DYN_SHIFT)
152 #define FPCR_DYN_NORMAL		(2ULL << FPCR_DYN_SHIFT)
153 #define FPCR_DYN_PLUS		(3ULL << FPCR_DYN_SHIFT)
154 #define FPCR_DYN_MASK		(3ULL << FPCR_DYN_SHIFT)
155 #define FPCR_IOV		(1ULL << 57)
156 #define FPCR_INE		(1ULL << 56)
157 #define FPCR_UNF		(1ULL << 55)
158 #define FPCR_OVF		(1ULL << 54)
159 #define FPCR_DZE		(1ULL << 53)
160 #define FPCR_INV		(1ULL << 52)
161 #define FPCR_OVFD		(1ULL << 51)
162 #define FPCR_DZED		(1ULL << 50)
163 #define FPCR_INVD		(1ULL << 49)
164 #define FPCR_DNZ		(1ULL << 48)
165 #define FPCR_DNOD		(1ULL << 47)
166 #define FPCR_STATUS_MASK	(FPCR_IOV | FPCR_INE | FPCR_UNF \
167 				 | FPCR_OVF | FPCR_DZE | FPCR_INV)
168 
169 /* The silly software trap enables implemented by the kernel emulation.
170    These are more or less architecturally required, since the real hardware
171    has read-as-zero bits in the FPCR when the features aren't implemented.
172    For the purposes of QEMU, we pretend the FPCR can hold everything.  */
173 #define SWCR_TRAP_ENABLE_INV	(1ULL << 1)
174 #define SWCR_TRAP_ENABLE_DZE	(1ULL << 2)
175 #define SWCR_TRAP_ENABLE_OVF	(1ULL << 3)
176 #define SWCR_TRAP_ENABLE_UNF	(1ULL << 4)
177 #define SWCR_TRAP_ENABLE_INE	(1ULL << 5)
178 #define SWCR_TRAP_ENABLE_DNO	(1ULL << 6)
179 #define SWCR_TRAP_ENABLE_MASK	((1ULL << 7) - (1ULL << 1))
180 
181 #define SWCR_MAP_DMZ		(1ULL << 12)
182 #define SWCR_MAP_UMZ		(1ULL << 13)
183 #define SWCR_MAP_MASK		(SWCR_MAP_DMZ | SWCR_MAP_UMZ)
184 
185 #define SWCR_STATUS_INV		(1ULL << 17)
186 #define SWCR_STATUS_DZE		(1ULL << 18)
187 #define SWCR_STATUS_OVF		(1ULL << 19)
188 #define SWCR_STATUS_UNF		(1ULL << 20)
189 #define SWCR_STATUS_INE		(1ULL << 21)
190 #define SWCR_STATUS_DNO		(1ULL << 22)
191 #define SWCR_STATUS_MASK	((1ULL << 23) - (1ULL << 17))
192 
193 #define SWCR_MASK  (SWCR_TRAP_ENABLE_MASK | SWCR_MAP_MASK | SWCR_STATUS_MASK)
194 
195 /* Internal processor registers */
196 /* XXX: TOFIX: most of those registers are implementation dependant */
197 enum {
198 #if defined(CONFIG_USER_ONLY)
199     IPR_EXC_ADDR,
200     IPR_EXC_SUM,
201     IPR_EXC_MASK,
202 #else
203     /* Ebox IPRs */
204     IPR_CC           = 0xC0,            /* 21264 */
205     IPR_CC_CTL       = 0xC1,            /* 21264 */
206 #define IPR_CC_CTL_ENA_SHIFT 32
207 #define IPR_CC_CTL_COUNTER_MASK 0xfffffff0UL
208     IPR_VA           = 0xC2,            /* 21264 */
209     IPR_VA_CTL       = 0xC4,            /* 21264 */
210 #define IPR_VA_CTL_VA_48_SHIFT 1
211 #define IPR_VA_CTL_VPTB_SHIFT 30
212     IPR_VA_FORM      = 0xC3,            /* 21264 */
213     /* Ibox IPRs */
214     IPR_ITB_TAG      = 0x00,            /* 21264 */
215     IPR_ITB_PTE      = 0x01,            /* 21264 */
216     IPR_ITB_IAP      = 0x02,
217     IPR_ITB_IA       = 0x03,            /* 21264 */
218     IPR_ITB_IS       = 0x04,            /* 21264 */
219     IPR_PMPC         = 0x05,
220     IPR_EXC_ADDR     = 0x06,            /* 21264 */
221     IPR_IVA_FORM     = 0x07,            /* 21264 */
222     IPR_CM           = 0x09,            /* 21264 */
223 #define IPR_CM_SHIFT 3
224 #define IPR_CM_MASK (3ULL << IPR_CM_SHIFT)      /* 21264 */
225     IPR_IER          = 0x0A,            /* 21264 */
226 #define IPR_IER_MASK 0x0000007fffffe000ULL
227     IPR_IER_CM       = 0x0B,            /* 21264: = CM | IER */
228     IPR_SIRR         = 0x0C,            /* 21264 */
229 #define IPR_SIRR_SHIFT 14
230 #define IPR_SIRR_MASK 0x7fff
231     IPR_ISUM         = 0x0D,            /* 21264 */
232     IPR_HW_INT_CLR   = 0x0E,            /* 21264 */
233     IPR_EXC_SUM      = 0x0F,
234     IPR_PAL_BASE     = 0x10,
235     IPR_I_CTL        = 0x11,
236 #define IPR_I_CTL_CHIP_ID_SHIFT 24      /* 21264 */
237 #define IPR_I_CTL_BIST_FAIL (1 << 23)   /* 21264 */
238 #define IPR_I_CTL_IC_EN_SHIFT 2         /* 21264 */
239 #define IPR_I_CTL_SDE1_SHIFT 7          /* 21264 */
240 #define IPR_I_CTL_HWE_SHIFT 12          /* 21264 */
241 #define IPR_I_CTL_VA_48_SHIFT 15        /* 21264 */
242 #define IPR_I_CTL_SPE_SHIFT 3           /* 21264 */
243 #define IPR_I_CTL_CALL_PAL_R23_SHIFT 20 /* 21264 */
244     IPR_I_STAT       = 0x16,            /* 21264 */
245     IPR_IC_FLUSH     = 0x13,            /* 21264 */
246     IPR_IC_FLUSH_ASM = 0x12,            /* 21264 */
247     IPR_CLR_MAP      = 0x15,
248     IPR_SLEEP        = 0x17,
249     IPR_PCTX         = 0x40,
250     IPR_PCTX_ASN       = 0x01,  /* field */
251 #define IPR_PCTX_ASN_SHIFT 39
252     IPR_PCTX_ASTER     = 0x02,  /* field */
253 #define IPR_PCTX_ASTER_SHIFT 5
254     IPR_PCTX_ASTRR     = 0x04,  /* field */
255 #define IPR_PCTX_ASTRR_SHIFT 9
256     IPR_PCTX_PPCE      = 0x08,  /* field */
257 #define IPR_PCTX_PPCE_SHIFT 1
258     IPR_PCTX_FPE       = 0x10,  /* field */
259 #define IPR_PCTX_FPE_SHIFT 2
260     IPR_PCTX_ALL       = 0x5f,  /* all fields */
261     IPR_PCTR_CTL     = 0x14,            /* 21264 */
262     /* Mbox IPRs */
263     IPR_DTB_TAG0     = 0x20,            /* 21264 */
264     IPR_DTB_TAG1     = 0xA0,            /* 21264 */
265     IPR_DTB_PTE0     = 0x21,            /* 21264 */
266     IPR_DTB_PTE1     = 0xA1,            /* 21264 */
267     IPR_DTB_ALTMODE  = 0xA6,
268     IPR_DTB_ALTMODE0 = 0x26,            /* 21264 */
269 #define IPR_DTB_ALTMODE_MASK 3
270     IPR_DTB_IAP      = 0xA2,
271     IPR_DTB_IA       = 0xA3,            /* 21264 */
272     IPR_DTB_IS0      = 0x24,
273     IPR_DTB_IS1      = 0xA4,
274     IPR_DTB_ASN0     = 0x25,            /* 21264 */
275     IPR_DTB_ASN1     = 0xA5,            /* 21264 */
276 #define IPR_DTB_ASN_SHIFT 56
277     IPR_MM_STAT      = 0x27,            /* 21264 */
278     IPR_M_CTL        = 0x28,            /* 21264 */
279 #define IPR_M_CTL_SPE_SHIFT 1
280 #define IPR_M_CTL_SPE_MASK 7
281     IPR_DC_CTL       = 0x29,            /* 21264 */
282     IPR_DC_STAT      = 0x2A,            /* 21264 */
283     /* Cbox IPRs */
284     IPR_C_DATA       = 0x2B,
285     IPR_C_SHIFT      = 0x2C,
286 
287     IPR_ASN,
288     IPR_ASTEN,
289     IPR_ASTSR,
290     IPR_DATFX,
291     IPR_ESP,
292     IPR_FEN,
293     IPR_IPIR,
294     IPR_IPL,
295     IPR_KSP,
296     IPR_MCES,
297     IPR_PERFMON,
298     IPR_PCBB,
299     IPR_PRBR,
300     IPR_PTBR,
301     IPR_SCBB,
302     IPR_SISR,
303     IPR_SSP,
304     IPR_SYSPTBR,
305     IPR_TBCHK,
306     IPR_TBIA,
307     IPR_TBIAP,
308     IPR_TBIS,
309     IPR_TBISD,
310     IPR_TBISI,
311     IPR_USP,
312     IPR_VIRBND,
313     IPR_VPTB,
314     IPR_WHAMI,
315     IPR_ALT_MODE,
316 #endif
317     IPR_LAST,
318 };
319 
320 typedef struct CPUAlphaState CPUAlphaState;
321 
322 typedef struct pal_handler_t pal_handler_t;
323 struct pal_handler_t {
324     /* Reset */
325     void (*reset)(CPUAlphaState *env);
326     /* Uncorrectable hardware error */
327     void (*machine_check)(CPUAlphaState *env);
328     /* Arithmetic exception */
329     void (*arithmetic)(CPUAlphaState *env);
330     /* Interrupt / correctable hardware error */
331     void (*interrupt)(CPUAlphaState *env);
332     /* Data fault */
333     void (*dfault)(CPUAlphaState *env);
334     /* DTB miss pal */
335     void (*dtb_miss_pal)(CPUAlphaState *env);
336     /* DTB miss native */
337     void (*dtb_miss_native)(CPUAlphaState *env);
338     /* Unaligned access */
339     void (*unalign)(CPUAlphaState *env);
340     /* ITB miss */
341     void (*itb_miss)(CPUAlphaState *env);
342     /* Instruction stream access violation */
343     void (*itb_acv)(CPUAlphaState *env);
344     /* Reserved or privileged opcode */
345     void (*opcdec)(CPUAlphaState *env);
346     /* Floating point exception */
347     void (*fen)(CPUAlphaState *env);
348     /* Call pal instruction */
349     void (*call_pal)(CPUAlphaState *env, uint32_t palcode);
350 };
351 
352 #define NB_MMU_MODES 4
353 
354 struct CPUAlphaState {
355     uint64_t ir[31];
356     float64 fir[31];
357     uint64_t pc;
358     uint64_t ipr[IPR_LAST];
359     uint64_t ps;
360     uint64_t unique;
361     uint64_t lock_addr;
362     uint64_t lock_st_addr;
363     uint64_t lock_value;
364     float_status fp_status;
365     /* The following fields make up the FPCR, but in FP_STATUS format.  */
366     uint8_t fpcr_exc_status;
367     uint8_t fpcr_exc_mask;
368     uint8_t fpcr_dyn_round;
369     uint8_t fpcr_flush_to_zero;
370     uint8_t fpcr_dnz;
371     uint8_t fpcr_dnod;
372     uint8_t fpcr_undz;
373 
374     /* Used for HW_LD / HW_ST */
375     uint8_t saved_mode;
376     /* For RC and RS */
377     uint8_t intr_flag;
378 
379 #if TARGET_LONG_BITS > HOST_LONG_BITS
380     /* temporary fixed-point registers
381      * used to emulate 64 bits target on 32 bits hosts
382      */
383     target_ulong t0, t1;
384 #endif
385 
386     /* Those resources are used only in Qemu core */
387     CPU_COMMON
388 
389     uint32_t hflags;
390 
391     int error_code;
392 
393     uint32_t features;
394     uint32_t amask;
395     int implver;
396     pal_handler_t *pal_handler;
397 };
398 
399 #define cpu_init cpu_alpha_init
400 #define cpu_exec cpu_alpha_exec
401 #define cpu_gen_code cpu_alpha_gen_code
402 #define cpu_signal_handler cpu_alpha_signal_handler
403 
404 /* MMU modes definitions */
405 #define MMU_MODE0_SUFFIX _kernel
406 #define MMU_MODE1_SUFFIX _executive
407 #define MMU_MODE2_SUFFIX _supervisor
408 #define MMU_MODE3_SUFFIX _user
409 #define MMU_USER_IDX 3
cpu_mmu_index(CPUState * env)410 static inline int cpu_mmu_index (CPUState *env)
411 {
412     return (env->ps >> 3) & 3;
413 }
414 
415 #include "cpu-all.h"
416 
417 enum {
418     FEATURE_ASN    = 0x00000001,
419     FEATURE_SPS    = 0x00000002,
420     FEATURE_VIRBND = 0x00000004,
421     FEATURE_TBCHK  = 0x00000008,
422 };
423 
424 enum {
425     EXCP_RESET            = 0x0000,
426     EXCP_MCHK             = 0x0020,
427     EXCP_ARITH            = 0x0060,
428     EXCP_HW_INTERRUPT     = 0x00E0,
429     EXCP_DFAULT           = 0x01E0,
430     EXCP_DTB_MISS_PAL     = 0x09E0,
431     EXCP_ITB_MISS         = 0x03E0,
432     EXCP_ITB_ACV          = 0x07E0,
433     EXCP_DTB_MISS_NATIVE  = 0x08E0,
434     EXCP_UNALIGN          = 0x11E0,
435     EXCP_OPCDEC           = 0x13E0,
436     EXCP_FEN              = 0x17E0,
437     EXCP_CALL_PAL         = 0x2000,
438     EXCP_CALL_PALP        = 0x3000,
439     EXCP_CALL_PALE        = 0x4000,
440     /* Pseudo exception for console */
441     EXCP_CONSOLE_DISPATCH = 0x4001,
442     EXCP_CONSOLE_FIXUP    = 0x4002,
443     EXCP_STL_C            = 0x4003,
444     EXCP_STQ_C            = 0x4004,
445 };
446 
447 /* Arithmetic exception */
448 #define EXC_M_IOV       (1<<16)         /* Integer Overflow */
449 #define EXC_M_INE       (1<<15)         /* Inexact result */
450 #define EXC_M_UNF       (1<<14)         /* Underflow */
451 #define EXC_M_FOV       (1<<13)         /* Overflow */
452 #define EXC_M_DZE       (1<<12)         /* Division by zero */
453 #define EXC_M_INV       (1<<11)         /* Invalid operation */
454 #define EXC_M_SWC       (1<<10)         /* Software completion */
455 
456 enum {
457     IR_V0   = 0,
458     IR_T0   = 1,
459     IR_T1   = 2,
460     IR_T2   = 3,
461     IR_T3   = 4,
462     IR_T4   = 5,
463     IR_T5   = 6,
464     IR_T6   = 7,
465     IR_T7   = 8,
466     IR_S0   = 9,
467     IR_S1   = 10,
468     IR_S2   = 11,
469     IR_S3   = 12,
470     IR_S4   = 13,
471     IR_S5   = 14,
472     IR_S6   = 15,
473     IR_FP   = IR_S6,
474     IR_A0   = 16,
475     IR_A1   = 17,
476     IR_A2   = 18,
477     IR_A3   = 19,
478     IR_A4   = 20,
479     IR_A5   = 21,
480     IR_T8   = 22,
481     IR_T9   = 23,
482     IR_T10  = 24,
483     IR_T11  = 25,
484     IR_RA   = 26,
485     IR_T12  = 27,
486     IR_PV   = IR_T12,
487     IR_AT   = 28,
488     IR_GP   = 29,
489     IR_SP   = 30,
490     IR_ZERO = 31,
491 };
492 
493 CPUAlphaState * cpu_alpha_init (const char *cpu_model);
494 int cpu_alpha_exec(CPUAlphaState *s);
495 /* you can call this signal handler from your SIGBUS and SIGSEGV
496    signal handlers to inform the virtual CPU of exceptions. non zero
497    is returned if the signal was handled by the virtual CPU.  */
498 int cpu_alpha_signal_handler(int host_signum, void *pinfo,
499                              void *puc);
500 int cpu_alpha_handle_mmu_fault (CPUState *env, uint64_t address, int rw,
501                                 int mmu_idx, int is_softmmu);
502 #define cpu_handle_mmu_fault cpu_alpha_handle_mmu_fault
503 void do_interrupt (CPUState *env);
504 
505 uint64_t cpu_alpha_load_fpcr (CPUState *env);
506 void cpu_alpha_store_fpcr (CPUState *env, uint64_t val);
507 int cpu_alpha_mfpr (CPUState *env, int iprn, uint64_t *valp);
508 int cpu_alpha_mtpr (CPUState *env, int iprn, uint64_t val, uint64_t *oldvalp);
509 #if !defined (CONFIG_USER_ONLY)
510 void pal_init (CPUState *env);
511 void call_pal (CPUState *env);
512 #endif
513 
cpu_get_tb_cpu_state(CPUState * env,target_ulong * pc,target_ulong * cs_base,int * flags)514 static inline void cpu_get_tb_cpu_state(CPUState *env, target_ulong *pc,
515                                         target_ulong *cs_base, int *flags)
516 {
517     *pc = env->pc;
518     *cs_base = 0;
519     *flags = env->ps;
520 }
521 
522 #if defined(CONFIG_USER_ONLY)
cpu_clone_regs(CPUState * env,target_ulong newsp)523 static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
524 {
525     if (newsp) {
526         env->ir[IR_SP] = newsp;
527     }
528     env->ir[IR_V0] = 0;
529     env->ir[IR_A3] = 0;
530 }
531 
cpu_set_tls(CPUState * env,target_ulong newtls)532 static inline void cpu_set_tls(CPUState *env, target_ulong newtls)
533 {
534     env->unique = newtls;
535 }
536 #endif
537 
538 #endif /* !defined (__CPU_ALPHA_H__) */
539