2 * Alpha emulation cpu definitions for qemu.
4 * Copyright (c) 2007 Jocelyn Mayer
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.
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.
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/>.
23 #include "qemu-common.h"
25 #include "exec/cpu-defs.h"
29 /* Alpha processors have a weak memory model */
30 #define TCG_GUEST_DEFAULT_MO (0)
32 #define ICACHE_LINE_SIZE 32
33 #define DCACHE_LINE_SIZE 32
35 /* Alpha major type */
41 ALPHA_EV5 = 5, /* 21164 */
42 ALPHA_EV45 = 6, /* 21064A */
43 ALPHA_EV56 = 7, /* 21164A */
54 ALPHA_LCA_1 = 1, /* 21066 */
55 ALPHA_LCA_2 = 2, /* 20166 */
56 ALPHA_LCA_3 = 3, /* 21068 */
57 ALPHA_LCA_4 = 4, /* 21068 */
58 ALPHA_LCA_5 = 5, /* 21066A */
59 ALPHA_LCA_6 = 6, /* 21068A */
64 ALPHA_EV5_1 = 1, /* Rev BA, CA */
65 ALPHA_EV5_2 = 2, /* Rev DA, EA */
66 ALPHA_EV5_3 = 3, /* Pass 3 */
67 ALPHA_EV5_4 = 4, /* Pass 3.2 */
68 ALPHA_EV5_5 = 5, /* Pass 4 */
73 ALPHA_EV45_1 = 1, /* Pass 1 */
74 ALPHA_EV45_2 = 2, /* Pass 1.1 */
75 ALPHA_EV45_3 = 3, /* Pass 2 */
80 ALPHA_EV56_1 = 1, /* Pass 1 */
81 ALPHA_EV56_2 = 2, /* Pass 2 */
85 IMPLVER_2106x = 0, /* EV4, EV45 & LCA45 */
86 IMPLVER_21164 = 1, /* EV5, EV56 & PCA45 */
87 IMPLVER_21264 = 2, /* EV6, EV67 & EV68x */
88 IMPLVER_21364 = 3, /* EV7 & EV79 */
92 AMASK_BWX = 0x00000001,
93 AMASK_FIX = 0x00000002,
94 AMASK_CIX = 0x00000004,
95 AMASK_MVI = 0x00000100,
96 AMASK_TRAP = 0x00000200,
97 AMASK_PREFETCH = 0x00001000,
101 VAX_ROUND_NORMAL = 0,
106 IEEE_ROUND_NORMAL = 0,
113 /* IEEE floating-point operations encoding */
125 FP_ROUND_CHOPPED = 0x0,
126 FP_ROUND_MINUS = 0x1,
127 FP_ROUND_NORMAL = 0x2,
128 FP_ROUND_DYNAMIC = 0x3,
131 /* FPCR bits -- right-shifted 32 so we can use a uint32_t. */
132 #define FPCR_SUM (1U << (63 - 32))
133 #define FPCR_INED (1U << (62 - 32))
134 #define FPCR_UNFD (1U << (61 - 32))
135 #define FPCR_UNDZ (1U << (60 - 32))
136 #define FPCR_DYN_SHIFT (58 - 32)
137 #define FPCR_DYN_CHOPPED (0U << FPCR_DYN_SHIFT)
138 #define FPCR_DYN_MINUS (1U << FPCR_DYN_SHIFT)
139 #define FPCR_DYN_NORMAL (2U << FPCR_DYN_SHIFT)
140 #define FPCR_DYN_PLUS (3U << FPCR_DYN_SHIFT)
141 #define FPCR_DYN_MASK (3U << FPCR_DYN_SHIFT)
142 #define FPCR_IOV (1U << (57 - 32))
143 #define FPCR_INE (1U << (56 - 32))
144 #define FPCR_UNF (1U << (55 - 32))
145 #define FPCR_OVF (1U << (54 - 32))
146 #define FPCR_DZE (1U << (53 - 32))
147 #define FPCR_INV (1U << (52 - 32))
148 #define FPCR_OVFD (1U << (51 - 32))
149 #define FPCR_DZED (1U << (50 - 32))
150 #define FPCR_INVD (1U << (49 - 32))
151 #define FPCR_DNZ (1U << (48 - 32))
152 #define FPCR_DNOD (1U << (47 - 32))
153 #define FPCR_STATUS_MASK (FPCR_IOV | FPCR_INE | FPCR_UNF \
154 | FPCR_OVF | FPCR_DZE | FPCR_INV)
156 /* The silly software trap enables implemented by the kernel emulation.
157 These are more or less architecturally required, since the real hardware
158 has read-as-zero bits in the FPCR when the features aren't implemented.
159 For the purposes of QEMU, we pretend the FPCR can hold everything. */
160 #define SWCR_TRAP_ENABLE_INV (1U << 1)
161 #define SWCR_TRAP_ENABLE_DZE (1U << 2)
162 #define SWCR_TRAP_ENABLE_OVF (1U << 3)
163 #define SWCR_TRAP_ENABLE_UNF (1U << 4)
164 #define SWCR_TRAP_ENABLE_INE (1U << 5)
165 #define SWCR_TRAP_ENABLE_DNO (1U << 6)
166 #define SWCR_TRAP_ENABLE_MASK ((1U << 7) - (1U << 1))
168 #define SWCR_MAP_DMZ (1U << 12)
169 #define SWCR_MAP_UMZ (1U << 13)
170 #define SWCR_MAP_MASK (SWCR_MAP_DMZ | SWCR_MAP_UMZ)
172 #define SWCR_STATUS_INV (1U << 17)
173 #define SWCR_STATUS_DZE (1U << 18)
174 #define SWCR_STATUS_OVF (1U << 19)
175 #define SWCR_STATUS_UNF (1U << 20)
176 #define SWCR_STATUS_INE (1U << 21)
177 #define SWCR_STATUS_DNO (1U << 22)
178 #define SWCR_STATUS_MASK ((1U << 23) - (1U << 17))
180 #define SWCR_STATUS_TO_EXCSUM_SHIFT 16
182 #define SWCR_MASK (SWCR_TRAP_ENABLE_MASK | SWCR_MAP_MASK | SWCR_STATUS_MASK)
184 /* MMU modes definitions */
186 /* Alpha has 5 MMU modes: PALcode, Kernel, Executive, Supervisor, and User.
187 The Unix PALcode only exposes the kernel and user modes; presumably
188 executive and supervisor are used by VMS.
190 PALcode itself uses physical mode for code and kernel mode for data;
191 there are PALmode instructions that can access data via physical mode
192 or via an os-installed "alternate mode", which is one of the 4 above.
194 That said, we're only emulating Unix PALcode, and not attempting VMS,
195 so we don't need to implement Executive and Supervisor. QEMU's own
196 PALcode cheats and usees the KSEG mapping for its code+data rather than
197 physical addresses. */
199 #define MMU_MODE0_SUFFIX _kernel
200 #define MMU_MODE1_SUFFIX _user
201 #define MMU_KERNEL_IDX 0
202 #define MMU_USER_IDX 1
203 #define MMU_PHYS_IDX 2
205 typedef struct CPUAlphaState CPUAlphaState;
207 struct CPUAlphaState {
215 /* The FPCR, and disassembled portions thereof. */
217 #ifdef CONFIG_USER_ONLY
220 uint32_t fpcr_exc_enable;
221 float_status fp_status;
222 uint8_t fpcr_dyn_round;
223 uint8_t fpcr_flush_to_zero;
225 /* Mask of PALmode, Processor State et al. Most of this gets copied
226 into the TranslatorBlock flags and controls code generation. */
229 /* The high 32-bits of the processor cycle counter. */
232 /* These pass data from the exception logic in the translator and
233 helpers to the OS entry point. This is used for both system
234 emulation and user-mode. */
239 #if !defined(CONFIG_USER_ONLY)
240 /* The internal data required by our emulation of the Unix PALcode. */
248 uint64_t scratch[24];
251 /* This alarm doesn't exist in real hardware; we wish it did. */
252 uint64_t alarm_expire;
263 * @env: #CPUAlphaState
272 CPUNegativeOffsetState neg;
275 /* This alarm doesn't exist in real hardware; we wish it did. */
276 QEMUTimer *alarm_timer;
280 #ifndef CONFIG_USER_ONLY
281 extern const struct VMStateDescription vmstate_alpha_cpu;
284 void alpha_cpu_do_interrupt(CPUState *cpu);
285 bool alpha_cpu_exec_interrupt(CPUState *cpu, int int_req);
286 void alpha_cpu_dump_state(CPUState *cs, FILE *f, int flags);
287 hwaddr alpha_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
288 int alpha_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
289 int alpha_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
290 void alpha_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
291 MMUAccessType access_type,
292 int mmu_idx, uintptr_t retaddr);
294 #define cpu_list alpha_cpu_list
295 #define cpu_signal_handler cpu_alpha_signal_handler
297 typedef CPUAlphaState CPUArchState;
298 typedef AlphaCPU ArchCPU;
300 #include "exec/cpu-all.h"
303 FEATURE_ASN = 0x00000001,
304 FEATURE_SPS = 0x00000002,
305 FEATURE_VIRBND = 0x00000004,
306 FEATURE_TBCHK = 0x00000008,
323 /* Alpha-specific interrupt pending bits. */
324 #define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_EXT_0
325 #define CPU_INTERRUPT_SMP CPU_INTERRUPT_TGT_EXT_1
326 #define CPU_INTERRUPT_MCHK CPU_INTERRUPT_TGT_EXT_2
328 /* OSF/1 Page table bits. */
331 PTE_FOR = 0x0002, /* used for page protection (fault on read) */
332 PTE_FOW = 0x0004, /* used for page protection (fault on write) */
333 PTE_FOE = 0x0008, /* used for page protection (fault on exec) */
341 /* Hardware interrupt (entInt) constants. */
350 /* Memory management (entMM) constants. */
359 /* Arithmetic exception (entArith) constants. */
361 EXC_M_SWC = 1, /* Software completion */
362 EXC_M_INV = 2, /* Invalid operation */
363 EXC_M_DZE = 4, /* Division by zero */
364 EXC_M_FOV = 8, /* Overflow */
365 EXC_M_UNF = 16, /* Underflow */
366 EXC_M_INE = 32, /* Inexact result */
367 EXC_M_IOV = 64 /* Integer Overflow */
370 /* Processor status constants. */
371 /* Low 3 bits are interrupt mask level. */
372 #define PS_INT_MASK 7u
374 /* Bits 4 and 5 are the mmu mode. The VMS PALcode uses all 4 modes;
375 The Unix PALcode only uses bit 4. */
376 #define PS_USER_MODE 8u
378 /* CPUAlphaState->flags constants. These are layed out so that we
379 can set or reset the pieces individually by assigning to the byte,
380 or manipulated as a whole. */
382 #define ENV_FLAG_PAL_SHIFT 0
383 #define ENV_FLAG_PS_SHIFT 8
384 #define ENV_FLAG_RX_SHIFT 16
385 #define ENV_FLAG_FEN_SHIFT 24
387 #define ENV_FLAG_PAL_MODE (1u << ENV_FLAG_PAL_SHIFT)
388 #define ENV_FLAG_PS_USER (PS_USER_MODE << ENV_FLAG_PS_SHIFT)
389 #define ENV_FLAG_RX_FLAG (1u << ENV_FLAG_RX_SHIFT)
390 #define ENV_FLAG_FEN (1u << ENV_FLAG_FEN_SHIFT)
392 #define ENV_FLAG_TB_MASK \
393 (ENV_FLAG_PAL_MODE | ENV_FLAG_PS_USER | ENV_FLAG_FEN)
395 static inline int cpu_mmu_index(CPUAlphaState *env, bool ifetch)
397 int ret = env->flags & ENV_FLAG_PS_USER ? MMU_USER_IDX : MMU_KERNEL_IDX;
398 if (env->flags & ENV_FLAG_PAL_MODE) {
399 ret = MMU_KERNEL_IDX;
441 void alpha_translate_init(void);
443 #define ALPHA_CPU_TYPE_SUFFIX "-" TYPE_ALPHA_CPU
444 #define ALPHA_CPU_TYPE_NAME(model) model ALPHA_CPU_TYPE_SUFFIX
445 #define CPU_RESOLVING_TYPE TYPE_ALPHA_CPU
447 void alpha_cpu_list(void);
448 /* you can call this signal handler from your SIGBUS and SIGSEGV
449 signal handlers to inform the virtual CPU of exceptions. non zero
450 is returned if the signal was handled by the virtual CPU. */
451 int cpu_alpha_signal_handler(int host_signum, void *pinfo,
453 bool alpha_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
454 MMUAccessType access_type, int mmu_idx,
455 bool probe, uintptr_t retaddr);
456 void QEMU_NORETURN dynamic_excp(CPUAlphaState *, uintptr_t, int, int);
457 void QEMU_NORETURN arith_excp(CPUAlphaState *, uintptr_t, int, uint64_t);
459 uint64_t cpu_alpha_load_fpcr (CPUAlphaState *env);
460 void cpu_alpha_store_fpcr (CPUAlphaState *env, uint64_t val);
461 uint64_t cpu_alpha_load_gr(CPUAlphaState *env, unsigned reg);
462 void cpu_alpha_store_gr(CPUAlphaState *env, unsigned reg, uint64_t val);
463 #ifndef CONFIG_USER_ONLY
464 void alpha_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
465 vaddr addr, unsigned size,
466 MMUAccessType access_type,
467 int mmu_idx, MemTxAttrs attrs,
468 MemTxResult response, uintptr_t retaddr);
471 static inline void cpu_get_tb_cpu_state(CPUAlphaState *env, target_ulong *pc,
472 target_ulong *cs_base, uint32_t *pflags)
476 *pflags = env->flags & ENV_FLAG_TB_MASK;
479 #ifdef CONFIG_USER_ONLY
480 /* Copied from linux ieee_swcr_to_fpcr. */
481 static inline uint64_t alpha_ieee_swcr_to_fpcr(uint64_t swcr)
485 fpcr |= (swcr & SWCR_STATUS_MASK) << 35;
486 fpcr |= (swcr & SWCR_MAP_DMZ) << 36;
487 fpcr |= (~swcr & (SWCR_TRAP_ENABLE_INV
488 | SWCR_TRAP_ENABLE_DZE
489 | SWCR_TRAP_ENABLE_OVF)) << 48;
490 fpcr |= (~swcr & (SWCR_TRAP_ENABLE_UNF
491 | SWCR_TRAP_ENABLE_INE)) << 57;
492 fpcr |= (swcr & SWCR_MAP_UMZ ? FPCR_UNDZ | FPCR_UNFD : 0);
493 fpcr |= (~swcr & SWCR_TRAP_ENABLE_DNO) << 41;
498 /* Copied from linux ieee_fpcr_to_swcr. */
499 static inline uint64_t alpha_ieee_fpcr_to_swcr(uint64_t fpcr)
503 swcr |= (fpcr >> 35) & SWCR_STATUS_MASK;
504 swcr |= (fpcr >> 36) & SWCR_MAP_DMZ;
505 swcr |= (~fpcr >> 48) & (SWCR_TRAP_ENABLE_INV
506 | SWCR_TRAP_ENABLE_DZE
507 | SWCR_TRAP_ENABLE_OVF);
508 swcr |= (~fpcr >> 57) & (SWCR_TRAP_ENABLE_UNF | SWCR_TRAP_ENABLE_INE);
509 swcr |= (fpcr >> 47) & SWCR_MAP_UMZ;
510 swcr |= (~fpcr >> 41) & SWCR_TRAP_ENABLE_DNO;
514 #endif /* CONFIG_USER_ONLY */
516 #endif /* ALPHA_CPU_H */