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/>.
20 #if !defined (__CPU_ALPHA_H__)
21 #define __CPU_ALPHA_H__
24 #include "qemu-common.h"
26 #define TARGET_LONG_BITS 64
29 #define CPUArchState struct CPUAlphaState
31 #include "exec/cpu-defs.h"
33 #include "fpu/softfloat.h"
35 #define ELF_MACHINE EM_ALPHA
37 #define ICACHE_LINE_SIZE 32
38 #define DCACHE_LINE_SIZE 32
40 #define TARGET_PAGE_BITS 13
42 #ifdef CONFIG_USER_ONLY
43 /* ??? The kernel likes to give addresses in high memory. If the host has
44 more virtual address space than the guest, this can lead to impossible
45 allocations. Honor the long-standing assumption that only kernel addrs
46 are negative, but otherwise allow allocations anywhere. This could lead
47 to tricky emulation problems for programs doing tagged addressing, but
48 that's far fewer than encounter the impossible allocation problem. */
49 #define TARGET_PHYS_ADDR_SPACE_BITS 63
50 #define TARGET_VIRT_ADDR_SPACE_BITS 63
52 /* ??? EV4 has 34 phys addr bits, EV5 has 40, EV6 has 44. */
53 #define TARGET_PHYS_ADDR_SPACE_BITS 44
54 #define TARGET_VIRT_ADDR_SPACE_BITS (30 + TARGET_PAGE_BITS)
57 /* Alpha major type */
63 ALPHA_EV5 = 5, /* 21164 */
64 ALPHA_EV45 = 6, /* 21064A */
65 ALPHA_EV56 = 7, /* 21164A */
76 ALPHA_LCA_1 = 1, /* 21066 */
77 ALPHA_LCA_2 = 2, /* 20166 */
78 ALPHA_LCA_3 = 3, /* 21068 */
79 ALPHA_LCA_4 = 4, /* 21068 */
80 ALPHA_LCA_5 = 5, /* 21066A */
81 ALPHA_LCA_6 = 6, /* 21068A */
86 ALPHA_EV5_1 = 1, /* Rev BA, CA */
87 ALPHA_EV5_2 = 2, /* Rev DA, EA */
88 ALPHA_EV5_3 = 3, /* Pass 3 */
89 ALPHA_EV5_4 = 4, /* Pass 3.2 */
90 ALPHA_EV5_5 = 5, /* Pass 4 */
95 ALPHA_EV45_1 = 1, /* Pass 1 */
96 ALPHA_EV45_2 = 2, /* Pass 1.1 */
97 ALPHA_EV45_3 = 3, /* Pass 2 */
100 /* EV56 minor type */
102 ALPHA_EV56_1 = 1, /* Pass 1 */
103 ALPHA_EV56_2 = 2, /* Pass 2 */
107 IMPLVER_2106x = 0, /* EV4, EV45 & LCA45 */
108 IMPLVER_21164 = 1, /* EV5, EV56 & PCA45 */
109 IMPLVER_21264 = 2, /* EV6, EV67 & EV68x */
110 IMPLVER_21364 = 3, /* EV7 & EV79 */
114 AMASK_BWX = 0x00000001,
115 AMASK_FIX = 0x00000002,
116 AMASK_CIX = 0x00000004,
117 AMASK_MVI = 0x00000100,
118 AMASK_TRAP = 0x00000200,
119 AMASK_PREFETCH = 0x00001000,
123 VAX_ROUND_NORMAL = 0,
128 IEEE_ROUND_NORMAL = 0,
135 /* IEEE floating-point operations encoding */
147 FP_ROUND_CHOPPED = 0x0,
148 FP_ROUND_MINUS = 0x1,
149 FP_ROUND_NORMAL = 0x2,
150 FP_ROUND_DYNAMIC = 0x3,
153 /* FPCR bits -- right-shifted 32 so we can use a uint32_t. */
154 #define FPCR_SUM (1U << (63 - 32))
155 #define FPCR_INED (1U << (62 - 32))
156 #define FPCR_UNFD (1U << (61 - 32))
157 #define FPCR_UNDZ (1U << (60 - 32))
158 #define FPCR_DYN_SHIFT (58 - 32)
159 #define FPCR_DYN_CHOPPED (0U << FPCR_DYN_SHIFT)
160 #define FPCR_DYN_MINUS (1U << FPCR_DYN_SHIFT)
161 #define FPCR_DYN_NORMAL (2U << FPCR_DYN_SHIFT)
162 #define FPCR_DYN_PLUS (3U << FPCR_DYN_SHIFT)
163 #define FPCR_DYN_MASK (3U << FPCR_DYN_SHIFT)
164 #define FPCR_IOV (1U << (57 - 32))
165 #define FPCR_INE (1U << (56 - 32))
166 #define FPCR_UNF (1U << (55 - 32))
167 #define FPCR_OVF (1U << (54 - 32))
168 #define FPCR_DZE (1U << (53 - 32))
169 #define FPCR_INV (1U << (52 - 32))
170 #define FPCR_OVFD (1U << (51 - 32))
171 #define FPCR_DZED (1U << (50 - 32))
172 #define FPCR_INVD (1U << (49 - 32))
173 #define FPCR_DNZ (1U << (48 - 32))
174 #define FPCR_DNOD (1U << (47 - 32))
175 #define FPCR_STATUS_MASK (FPCR_IOV | FPCR_INE | FPCR_UNF \
176 | FPCR_OVF | FPCR_DZE | FPCR_INV)
178 /* The silly software trap enables implemented by the kernel emulation.
179 These are more or less architecturally required, since the real hardware
180 has read-as-zero bits in the FPCR when the features aren't implemented.
181 For the purposes of QEMU, we pretend the FPCR can hold everything. */
182 #define SWCR_TRAP_ENABLE_INV (1U << 1)
183 #define SWCR_TRAP_ENABLE_DZE (1U << 2)
184 #define SWCR_TRAP_ENABLE_OVF (1U << 3)
185 #define SWCR_TRAP_ENABLE_UNF (1U << 4)
186 #define SWCR_TRAP_ENABLE_INE (1U << 5)
187 #define SWCR_TRAP_ENABLE_DNO (1U << 6)
188 #define SWCR_TRAP_ENABLE_MASK ((1U << 7) - (1U << 1))
190 #define SWCR_MAP_DMZ (1U << 12)
191 #define SWCR_MAP_UMZ (1U << 13)
192 #define SWCR_MAP_MASK (SWCR_MAP_DMZ | SWCR_MAP_UMZ)
194 #define SWCR_STATUS_INV (1U << 17)
195 #define SWCR_STATUS_DZE (1U << 18)
196 #define SWCR_STATUS_OVF (1U << 19)
197 #define SWCR_STATUS_UNF (1U << 20)
198 #define SWCR_STATUS_INE (1U << 21)
199 #define SWCR_STATUS_DNO (1U << 22)
200 #define SWCR_STATUS_MASK ((1U << 23) - (1U << 17))
202 #define SWCR_MASK (SWCR_TRAP_ENABLE_MASK | SWCR_MAP_MASK | SWCR_STATUS_MASK)
204 /* MMU modes definitions */
206 /* Alpha has 5 MMU modes: PALcode, kernel, executive, supervisor, and user.
207 The Unix PALcode only exposes the kernel and user modes; presumably
208 executive and supervisor are used by VMS.
210 PALcode itself uses physical mode for code and kernel mode for data;
211 there are PALmode instructions that can access data via physical mode
212 or via an os-installed "alternate mode", which is one of the 4 above.
214 QEMU does not currently properly distinguish between code/data when
215 looking up addresses. To avoid having to address this issue, our
216 emulated PALcode will cheat and use the KSEG mapping for its code+data
217 rather than physical addresses.
219 Moreover, we're only emulating Unix PALcode, and not attempting VMS.
221 All of which allows us to drop all but kernel and user modes.
222 Elide the unused MMU modes to save space. */
224 #define NB_MMU_MODES 2
226 #define MMU_MODE0_SUFFIX _kernel
227 #define MMU_MODE1_SUFFIX _user
228 #define MMU_KERNEL_IDX 0
229 #define MMU_USER_IDX 1
231 typedef struct CPUAlphaState CPUAlphaState;
233 struct CPUAlphaState {
239 uint64_t lock_st_addr;
242 /* The FPCR, and disassembled portions thereof. */
244 uint32_t fpcr_exc_enable;
245 float_status fp_status;
246 uint8_t fpcr_dyn_round;
247 uint8_t fpcr_flush_to_zero;
249 /* The Internal Processor Registers. Some of these we assume always
250 exist for use in user-mode. */
258 /* These pass data from the exception logic in the translator and
259 helpers to the OS entry point. This is used for both system
260 emulation and user-mode. */
265 #if !defined(CONFIG_USER_ONLY)
266 /* The internal data required by our emulation of the Unix PALcode. */
274 uint64_t scratch[24];
277 /* This alarm doesn't exist in real hardware; we wish it did. */
278 uint64_t alarm_expire;
280 /* Those resources are used only in QEMU core */
290 #define cpu_list alpha_cpu_list
291 #define cpu_exec cpu_alpha_exec
292 #define cpu_gen_code cpu_alpha_gen_code
293 #define cpu_signal_handler cpu_alpha_signal_handler
295 #include "exec/cpu-all.h"
299 FEATURE_ASN = 0x00000001,
300 FEATURE_SPS = 0x00000002,
301 FEATURE_VIRBND = 0x00000004,
302 FEATURE_TBCHK = 0x00000008,
317 /* For Usermode emulation. */
322 /* Alpha-specific interrupt pending bits. */
323 #define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_EXT_0
324 #define CPU_INTERRUPT_SMP CPU_INTERRUPT_TGT_EXT_1
325 #define CPU_INTERRUPT_MCHK CPU_INTERRUPT_TGT_EXT_2
327 /* OSF/1 Page table bits. */
330 PTE_FOR = 0x0002, /* used for page protection (fault on read) */
331 PTE_FOW = 0x0004, /* used for page protection (fault on write) */
332 PTE_FOE = 0x0008, /* used for page protection (fault on exec) */
340 /* Hardware interrupt (entInt) constants. */
349 /* Memory management (entMM) constants. */
358 /* Arithmetic exception (entArith) constants. */
360 EXC_M_SWC = 1, /* Software completion */
361 EXC_M_INV = 2, /* Invalid operation */
362 EXC_M_DZE = 4, /* Division by zero */
363 EXC_M_FOV = 8, /* Overflow */
364 EXC_M_UNF = 16, /* Underflow */
365 EXC_M_INE = 32, /* Inexact result */
366 EXC_M_IOV = 64 /* Integer Overflow */
369 /* Processor status constants. */
371 /* Low 3 bits are interrupt mask level. */
374 /* Bits 4 and 5 are the mmu mode. The VMS PALcode uses all 4 modes;
375 The Unix PALcode only uses bit 4. */
379 static inline int cpu_mmu_index(CPUAlphaState *env)
382 return MMU_KERNEL_IDX;
383 } else if (env->ps & PS_USER_MODE) {
386 return MMU_KERNEL_IDX;
427 void alpha_translate_init(void);
429 AlphaCPU *cpu_alpha_init(const char *cpu_model);
431 #define cpu_init(cpu_model) CPU(cpu_alpha_init(cpu_model))
433 void alpha_cpu_list(FILE *f, fprintf_function cpu_fprintf);
434 int cpu_alpha_exec(CPUState *cpu);
435 /* you can call this signal handler from your SIGBUS and SIGSEGV
436 signal handlers to inform the virtual CPU of exceptions. non zero
437 is returned if the signal was handled by the virtual CPU. */
438 int cpu_alpha_signal_handler(int host_signum, void *pinfo,
440 int alpha_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw,
442 void do_restore_state(CPUAlphaState *, uintptr_t retaddr);
443 void QEMU_NORETURN dynamic_excp(CPUAlphaState *, uintptr_t, int, int);
444 void QEMU_NORETURN arith_excp(CPUAlphaState *, uintptr_t, int, uint64_t);
446 uint64_t cpu_alpha_load_fpcr (CPUAlphaState *env);
447 void cpu_alpha_store_fpcr (CPUAlphaState *env, uint64_t val);
448 #ifndef CONFIG_USER_ONLY
449 void swap_shadow_regs(CPUAlphaState *env);
450 QEMU_NORETURN void alpha_cpu_unassigned_access(CPUState *cpu, hwaddr addr,
451 bool is_write, bool is_exec,
452 int unused, unsigned size);
455 /* Bits in TB->FLAGS that control how translation is processed. */
457 TB_FLAGS_PAL_MODE = 1,
459 TB_FLAGS_USER_MODE = 8,
461 TB_FLAGS_AMASK_SHIFT = 4,
462 TB_FLAGS_AMASK_BWX = AMASK_BWX << TB_FLAGS_AMASK_SHIFT,
463 TB_FLAGS_AMASK_FIX = AMASK_FIX << TB_FLAGS_AMASK_SHIFT,
464 TB_FLAGS_AMASK_CIX = AMASK_CIX << TB_FLAGS_AMASK_SHIFT,
465 TB_FLAGS_AMASK_MVI = AMASK_MVI << TB_FLAGS_AMASK_SHIFT,
466 TB_FLAGS_AMASK_TRAP = AMASK_TRAP << TB_FLAGS_AMASK_SHIFT,
467 TB_FLAGS_AMASK_PREFETCH = AMASK_PREFETCH << TB_FLAGS_AMASK_SHIFT,
470 static inline void cpu_get_tb_cpu_state(CPUAlphaState *env, target_ulong *pc,
471 target_ulong *cs_base, int *pflags)
479 flags = TB_FLAGS_PAL_MODE;
481 flags = env->ps & PS_USER_MODE;
484 flags |= TB_FLAGS_FEN;
486 flags |= env->amask << TB_FLAGS_AMASK_SHIFT;
491 #include "exec/exec-all.h"
493 #endif /* !defined (__CPU_ALPHA_H__) */