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;
254 /* Those resources are used only in QEMU core */
266 * @env: #CPUAlphaState
277 /* This alarm doesn't exist in real hardware; we wish it did. */
278 QEMUTimer *alarm_timer;
281 static inline AlphaCPU *alpha_env_get_cpu(CPUAlphaState *env)
283 return container_of(env, AlphaCPU, env);
286 #define ENV_GET_CPU(e) CPU(alpha_env_get_cpu(e))
288 #define ENV_OFFSET offsetof(AlphaCPU, env)
290 #ifndef CONFIG_USER_ONLY
291 extern const struct VMStateDescription vmstate_alpha_cpu;
294 void alpha_cpu_do_interrupt(CPUState *cpu);
295 bool alpha_cpu_exec_interrupt(CPUState *cpu, int int_req);
296 void alpha_cpu_dump_state(CPUState *cs, FILE *f, int flags);
297 hwaddr alpha_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
298 int alpha_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
299 int alpha_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
300 void alpha_cpu_do_unaligned_access(CPUState *cpu, vaddr addr,
301 MMUAccessType access_type,
302 int mmu_idx, uintptr_t retaddr);
304 #define cpu_list alpha_cpu_list
305 #define cpu_signal_handler cpu_alpha_signal_handler
307 typedef CPUAlphaState CPUArchState;
308 typedef AlphaCPU ArchCPU;
310 #include "exec/cpu-all.h"
313 FEATURE_ASN = 0x00000001,
314 FEATURE_SPS = 0x00000002,
315 FEATURE_VIRBND = 0x00000004,
316 FEATURE_TBCHK = 0x00000008,
333 /* Alpha-specific interrupt pending bits. */
334 #define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_EXT_0
335 #define CPU_INTERRUPT_SMP CPU_INTERRUPT_TGT_EXT_1
336 #define CPU_INTERRUPT_MCHK CPU_INTERRUPT_TGT_EXT_2
338 /* OSF/1 Page table bits. */
341 PTE_FOR = 0x0002, /* used for page protection (fault on read) */
342 PTE_FOW = 0x0004, /* used for page protection (fault on write) */
343 PTE_FOE = 0x0008, /* used for page protection (fault on exec) */
351 /* Hardware interrupt (entInt) constants. */
360 /* Memory management (entMM) constants. */
369 /* Arithmetic exception (entArith) constants. */
371 EXC_M_SWC = 1, /* Software completion */
372 EXC_M_INV = 2, /* Invalid operation */
373 EXC_M_DZE = 4, /* Division by zero */
374 EXC_M_FOV = 8, /* Overflow */
375 EXC_M_UNF = 16, /* Underflow */
376 EXC_M_INE = 32, /* Inexact result */
377 EXC_M_IOV = 64 /* Integer Overflow */
380 /* Processor status constants. */
381 /* Low 3 bits are interrupt mask level. */
382 #define PS_INT_MASK 7u
384 /* Bits 4 and 5 are the mmu mode. The VMS PALcode uses all 4 modes;
385 The Unix PALcode only uses bit 4. */
386 #define PS_USER_MODE 8u
388 /* CPUAlphaState->flags constants. These are layed out so that we
389 can set or reset the pieces individually by assigning to the byte,
390 or manipulated as a whole. */
392 #define ENV_FLAG_PAL_SHIFT 0
393 #define ENV_FLAG_PS_SHIFT 8
394 #define ENV_FLAG_RX_SHIFT 16
395 #define ENV_FLAG_FEN_SHIFT 24
397 #define ENV_FLAG_PAL_MODE (1u << ENV_FLAG_PAL_SHIFT)
398 #define ENV_FLAG_PS_USER (PS_USER_MODE << ENV_FLAG_PS_SHIFT)
399 #define ENV_FLAG_RX_FLAG (1u << ENV_FLAG_RX_SHIFT)
400 #define ENV_FLAG_FEN (1u << ENV_FLAG_FEN_SHIFT)
402 #define ENV_FLAG_TB_MASK \
403 (ENV_FLAG_PAL_MODE | ENV_FLAG_PS_USER | ENV_FLAG_FEN)
405 static inline int cpu_mmu_index(CPUAlphaState *env, bool ifetch)
407 int ret = env->flags & ENV_FLAG_PS_USER ? MMU_USER_IDX : MMU_KERNEL_IDX;
408 if (env->flags & ENV_FLAG_PAL_MODE) {
409 ret = MMU_KERNEL_IDX;
451 void alpha_translate_init(void);
453 #define ALPHA_CPU_TYPE_SUFFIX "-" TYPE_ALPHA_CPU
454 #define ALPHA_CPU_TYPE_NAME(model) model ALPHA_CPU_TYPE_SUFFIX
455 #define CPU_RESOLVING_TYPE TYPE_ALPHA_CPU
457 void alpha_cpu_list(void);
458 /* you can call this signal handler from your SIGBUS and SIGSEGV
459 signal handlers to inform the virtual CPU of exceptions. non zero
460 is returned if the signal was handled by the virtual CPU. */
461 int cpu_alpha_signal_handler(int host_signum, void *pinfo,
463 bool alpha_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
464 MMUAccessType access_type, int mmu_idx,
465 bool probe, uintptr_t retaddr);
466 void QEMU_NORETURN dynamic_excp(CPUAlphaState *, uintptr_t, int, int);
467 void QEMU_NORETURN arith_excp(CPUAlphaState *, uintptr_t, int, uint64_t);
469 uint64_t cpu_alpha_load_fpcr (CPUAlphaState *env);
470 void cpu_alpha_store_fpcr (CPUAlphaState *env, uint64_t val);
471 uint64_t cpu_alpha_load_gr(CPUAlphaState *env, unsigned reg);
472 void cpu_alpha_store_gr(CPUAlphaState *env, unsigned reg, uint64_t val);
473 #ifndef CONFIG_USER_ONLY
474 void alpha_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
475 vaddr addr, unsigned size,
476 MMUAccessType access_type,
477 int mmu_idx, MemTxAttrs attrs,
478 MemTxResult response, uintptr_t retaddr);
481 static inline void cpu_get_tb_cpu_state(CPUAlphaState *env, target_ulong *pc,
482 target_ulong *cs_base, uint32_t *pflags)
486 *pflags = env->flags & ENV_FLAG_TB_MASK;
489 #ifdef CONFIG_USER_ONLY
490 /* Copied from linux ieee_swcr_to_fpcr. */
491 static inline uint64_t alpha_ieee_swcr_to_fpcr(uint64_t swcr)
495 fpcr |= (swcr & SWCR_STATUS_MASK) << 35;
496 fpcr |= (swcr & SWCR_MAP_DMZ) << 36;
497 fpcr |= (~swcr & (SWCR_TRAP_ENABLE_INV
498 | SWCR_TRAP_ENABLE_DZE
499 | SWCR_TRAP_ENABLE_OVF)) << 48;
500 fpcr |= (~swcr & (SWCR_TRAP_ENABLE_UNF
501 | SWCR_TRAP_ENABLE_INE)) << 57;
502 fpcr |= (swcr & SWCR_MAP_UMZ ? FPCR_UNDZ | FPCR_UNFD : 0);
503 fpcr |= (~swcr & SWCR_TRAP_ENABLE_DNO) << 41;
508 /* Copied from linux ieee_fpcr_to_swcr. */
509 static inline uint64_t alpha_ieee_fpcr_to_swcr(uint64_t fpcr)
513 swcr |= (fpcr >> 35) & SWCR_STATUS_MASK;
514 swcr |= (fpcr >> 36) & SWCR_MAP_DMZ;
515 swcr |= (~fpcr >> 48) & (SWCR_TRAP_ENABLE_INV
516 | SWCR_TRAP_ENABLE_DZE
517 | SWCR_TRAP_ENABLE_OVF);
518 swcr |= (~fpcr >> 57) & (SWCR_TRAP_ENABLE_UNF | SWCR_TRAP_ENABLE_INE);
519 swcr |= (fpcr >> 47) & SWCR_MAP_UMZ;
520 swcr |= (~fpcr >> 41) & SWCR_TRAP_ENABLE_DNO;
524 #endif /* CONFIG_USER_ONLY */
526 #endif /* ALPHA_CPU_H */