2 * ARM virtual CPU header
4 * Copyright (c) 2003 Fabrice Bellard
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, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #define TARGET_LONG_BITS 32
25 #define ELF_MACHINE EM_ARM
29 #include "softfloat.h"
31 #define TARGET_HAS_ICE 1
33 #define EXCP_UDEF 1 /* undefined instruction */
34 #define EXCP_SWI 2 /* software interrupt */
35 #define EXCP_PREFETCH_ABORT 3
36 #define EXCP_DATA_ABORT 4
40 #define EXCP_EXCEPTION_EXIT 8 /* Return from v7M exception. */
41 #define EXCP_KERNEL_TRAP 9 /* Jumped to kernel code page. */
43 #define ARMV7M_EXCP_RESET 1
44 #define ARMV7M_EXCP_NMI 2
45 #define ARMV7M_EXCP_HARD 3
46 #define ARMV7M_EXCP_MEM 4
47 #define ARMV7M_EXCP_BUS 5
48 #define ARMV7M_EXCP_USAGE 6
49 #define ARMV7M_EXCP_SVC 11
50 #define ARMV7M_EXCP_DEBUG 12
51 #define ARMV7M_EXCP_PENDSV 14
52 #define ARMV7M_EXCP_SYSTICK 15
54 typedef void ARMWriteCPFunc(void *opaque, int cp_info,
55 int srcreg, int operand, uint32_t value);
56 typedef uint32_t ARMReadCPFunc(void *opaque, int cp_info,
57 int dstreg, int operand);
61 #define NB_MMU_MODES 2
63 /* We currently assume float and double are IEEE single and double
64 precision respectively.
65 Doing runtime conversions is tricky because VFP registers may contain
66 integer values (eg. as the result of a FTOSI instruction).
67 s<2n> maps to the least significant half of d<n>
68 s<2n+1> maps to the most significant half of d<n>
71 typedef struct CPUARMState {
72 /* Regs for current mode. */
74 /* Frequently accessed CPSR bits are stored separately for efficiently.
75 This contains all the other bits. Use cpsr_{read,write} to access
77 uint32_t uncached_cpsr;
80 /* Banked registers. */
81 uint32_t banked_spsr[6];
82 uint32_t banked_r13[6];
83 uint32_t banked_r14[6];
85 /* These hold r8-r12. */
89 /* cpsr flag cache for faster execution */
90 uint32_t CF; /* 0 or 1 */
91 uint32_t VF; /* V is the bit 31. All other bits are undefined */
92 uint32_t NF; /* N is bit 31. All other bits are undefined. */
93 uint32_t ZF; /* Z set if zero. */
94 uint32_t QF; /* 0 or 1 */
95 uint32_t GE; /* cpsr[19:16] */
96 uint32_t thumb; /* cpsr[5]. 0 = arm mode, 1 = thumb mode. */
97 uint32_t condexec_bits; /* IT bits. cpsr[15:10,26:25]. */
99 /* System control coprocessor (cp15) */
102 uint32_t c0_cachetype;
103 uint32_t c0_c1[8]; /* Feature registers. */
104 uint32_t c0_c2[8]; /* Instruction set registers. */
105 uint32_t c1_sys; /* System control register. */
106 uint32_t c1_coproc; /* Coprocessor access register. */
107 uint32_t c1_xscaleauxcr; /* XScale auxiliary control register. */
108 uint32_t c2_base0; /* MMU translation table base 0. */
109 uint32_t c2_base1; /* MMU translation table base 1. */
110 uint32_t c2_control; /* MMU translation table base control. */
111 uint32_t c2_mask; /* MMU translation table base selection mask. */
112 uint32_t c2_base_mask; /* MMU translation table base 0 mask. */
113 uint32_t c2_data; /* MPU data cachable bits. */
114 uint32_t c2_insn; /* MPU instruction cachable bits. */
115 uint32_t c3; /* MMU domain access control register
116 MPU write buffer control. */
117 uint32_t c5_insn; /* Fault status registers. */
119 uint32_t c6_region[8]; /* MPU base/size registers. */
120 uint32_t c6_insn; /* Fault address registers. */
122 uint32_t c9_insn; /* Cache lockdown registers. */
124 uint32_t c13_fcse; /* FCSE PID. */
125 uint32_t c13_context; /* Context ID. */
126 uint32_t c13_tls1; /* User RW Thread register. */
127 uint32_t c13_tls2; /* User RO Thread register. */
128 uint32_t c13_tls3; /* Privileged Thread register. */
129 uint32_t c15_cpar; /* XScale Coprocessor Access Register */
130 uint32_t c15_ticonfig; /* TI925T configuration byte. */
131 uint32_t c15_i_max; /* Maximum D-cache dirty line index. */
132 uint32_t c15_i_min; /* Minimum D-cache dirty line index. */
133 uint32_t c15_threadid; /* TI debugger thread-ID. */
143 int pending_exception;
147 /* Coprocessor IO used by peripherals */
149 ARMReadCPFunc *cp_read;
150 ARMWriteCPFunc *cp_write;
154 /* Thumb-2 EE state. */
158 /* Internal CPU feature flags. */
161 /* Callback for vectored interrupt controller. */
162 int (*get_irq_vector)(struct CPUARMState *);
165 /* VFP coprocessor state. */
170 /* We store these fpcsr fields separately for convenience. */
174 /* scratch space when Tn are not sufficient. */
177 float_status fp_status;
179 #if defined(CONFIG_USER_ONLY)
180 struct mmon_state *mmon_entry;
185 /* iwMMXt coprocessor state. */
193 #if defined(CONFIG_USER_ONLY)
194 /* For usermode syscall translation. */
200 /* These fields after the common ones so they are preserved on reset. */
201 struct arm_boot_info *boot_info;
204 CPUARMState *cpu_arm_init(const char *cpu_model);
205 void arm_translate_init(void);
206 int cpu_arm_exec(CPUARMState *s);
207 void cpu_arm_close(CPUARMState *s);
208 void do_interrupt(CPUARMState *);
209 void switch_mode(CPUARMState *, int);
210 uint32_t do_arm_semihosting(CPUARMState *env);
212 /* you can call this signal handler from your SIGBUS and SIGSEGV
213 signal handlers to inform the virtual CPU of exceptions. non zero
214 is returned if the signal was handled by the virtual CPU. */
215 int cpu_arm_signal_handler(int host_signum, void *pinfo,
219 void cpu_unlock(void);
220 static inline void cpu_set_tls(CPUARMState *env, target_ulong newtls)
222 env->cp15.c13_tls2 = newtls;
225 #define CPSR_M (0x1f)
226 #define CPSR_T (1 << 5)
227 #define CPSR_F (1 << 6)
228 #define CPSR_I (1 << 7)
229 #define CPSR_A (1 << 8)
230 #define CPSR_E (1 << 9)
231 #define CPSR_IT_2_7 (0xfc00)
232 #define CPSR_GE (0xf << 16)
233 #define CPSR_RESERVED (0xf << 20)
234 #define CPSR_J (1 << 24)
235 #define CPSR_IT_0_1 (3 << 25)
236 #define CPSR_Q (1 << 27)
237 #define CPSR_V (1 << 28)
238 #define CPSR_C (1 << 29)
239 #define CPSR_Z (1 << 30)
240 #define CPSR_N (1 << 31)
241 #define CPSR_NZCV (CPSR_N | CPSR_Z | CPSR_C | CPSR_V)
243 #define CPSR_IT (CPSR_IT_0_1 | CPSR_IT_2_7)
244 #define CACHED_CPSR_BITS (CPSR_T | CPSR_GE | CPSR_IT | CPSR_Q | CPSR_NZCV)
245 /* Bits writable in user mode. */
246 #define CPSR_USER (CPSR_NZCV | CPSR_Q | CPSR_GE)
247 /* Execution state bits. MRS read as zero, MSR writes ignored. */
248 #define CPSR_EXEC (CPSR_T | CPSR_IT | CPSR_J)
250 /* Return the current CPSR value. */
251 uint32_t cpsr_read(CPUARMState *env);
252 /* Set the CPSR. Note that some bits of mask must be all-set or all-clear. */
253 void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask);
255 /* Return the current xPSR value. */
256 static inline uint32_t xpsr_read(CPUARMState *env)
260 return (env->NF & 0x80000000) | (ZF << 30)
261 | (env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27)
262 | (env->thumb << 24) | ((env->condexec_bits & 3) << 25)
263 | ((env->condexec_bits & 0xfc) << 8)
264 | env->v7m.exception;
267 /* Set the xPSR. Note that some bits of mask must be all-set or all-clear. */
268 static inline void xpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
270 if (mask & CPSR_NZCV) {
271 env->ZF = (~val) & CPSR_Z;
273 env->CF = (val >> 29) & 1;
274 env->VF = (val << 3) & 0x80000000;
277 env->QF = ((val & CPSR_Q) != 0);
278 if (mask & (1 << 24))
279 env->thumb = ((val & (1 << 24)) != 0);
280 if (mask & CPSR_IT_0_1) {
281 env->condexec_bits &= ~3;
282 env->condexec_bits |= (val >> 25) & 3;
284 if (mask & CPSR_IT_2_7) {
285 env->condexec_bits &= 3;
286 env->condexec_bits |= (val >> 8) & 0xfc;
289 env->v7m.exception = val & 0x1ff;
294 ARM_CPU_MODE_USR = 0x10,
295 ARM_CPU_MODE_FIQ = 0x11,
296 ARM_CPU_MODE_IRQ = 0x12,
297 ARM_CPU_MODE_SVC = 0x13,
298 ARM_CPU_MODE_ABT = 0x17,
299 ARM_CPU_MODE_UND = 0x1b,
300 ARM_CPU_MODE_SYS = 0x1f
303 /* VFP system registers. */
304 #define ARM_VFP_FPSID 0
305 #define ARM_VFP_FPSCR 1
306 #define ARM_VFP_MVFR1 6
307 #define ARM_VFP_MVFR0 7
308 #define ARM_VFP_FPEXC 8
309 #define ARM_VFP_FPINST 9
310 #define ARM_VFP_FPINST2 10
312 /* iwMMXt coprocessor control registers. */
313 #define ARM_IWMMXT_wCID 0
314 #define ARM_IWMMXT_wCon 1
315 #define ARM_IWMMXT_wCSSF 2
316 #define ARM_IWMMXT_wCASF 3
317 #define ARM_IWMMXT_wCGR0 8
318 #define ARM_IWMMXT_wCGR1 9
319 #define ARM_IWMMXT_wCGR2 10
320 #define ARM_IWMMXT_wCGR3 11
324 ARM_FEATURE_AUXCR, /* ARM1026 Auxiliary control register. */
325 ARM_FEATURE_XSCALE, /* Intel XScale extensions. */
326 ARM_FEATURE_IWMMXT, /* Intel iwMMXt extension. */
331 ARM_FEATURE_MPU, /* Only has Memory Protection Unit, not full MMU. */
335 ARM_FEATURE_M, /* Microcontroller profile. */
336 ARM_FEATURE_OMAPCP, /* OMAP specific CP15 ops handling. */
340 static inline int arm_feature(CPUARMState *env, int feature)
342 return (env->features & (1u << feature)) != 0;
345 void arm_cpu_list(FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...));
347 /* Interface between CPU and Interrupt controller. */
348 void armv7m_nvic_set_pending(void *opaque, int irq);
349 int armv7m_nvic_acknowledge_irq(void *opaque);
350 void armv7m_nvic_complete_irq(void *opaque, int irq);
352 void cpu_arm_set_cp_io(CPUARMState *env, int cpnum,
353 ARMReadCPFunc *cp_read, ARMWriteCPFunc *cp_write,
356 /* Does the core conform to the the "MicroController" profile. e.g. Cortex-M3.
357 Note the M in older cores (eg. ARM7TDMI) stands for Multiply. These are
358 conventional cores (ie. Application or Realtime profile). */
360 #define IS_M(env) arm_feature(env, ARM_FEATURE_M)
361 #define ARM_CPUID(env) (env->cp15.c0_cpuid)
363 #define ARM_CPUID_ARM1026 0x4106a262
364 #define ARM_CPUID_ARM926 0x41069265
365 #define ARM_CPUID_ARM946 0x41059461
366 #define ARM_CPUID_TI915T 0x54029152
367 #define ARM_CPUID_TI925T 0x54029252
368 #define ARM_CPUID_PXA250 0x69052100
369 #define ARM_CPUID_PXA255 0x69052d00
370 #define ARM_CPUID_PXA260 0x69052903
371 #define ARM_CPUID_PXA261 0x69052d05
372 #define ARM_CPUID_PXA262 0x69052d06
373 #define ARM_CPUID_PXA270 0x69054110
374 #define ARM_CPUID_PXA270_A0 0x69054110
375 #define ARM_CPUID_PXA270_A1 0x69054111
376 #define ARM_CPUID_PXA270_B0 0x69054112
377 #define ARM_CPUID_PXA270_B1 0x69054113
378 #define ARM_CPUID_PXA270_C0 0x69054114
379 #define ARM_CPUID_PXA270_C5 0x69054117
380 #define ARM_CPUID_ARM1136 0x4117b363
381 #define ARM_CPUID_ARM1136_R2 0x4107b362
382 #define ARM_CPUID_ARM11MPCORE 0x410fb022
383 #define ARM_CPUID_CORTEXA8 0x410fc080
384 #define ARM_CPUID_CORTEXM3 0x410fc231
385 #define ARM_CPUID_ANY 0xffffffff
387 #if defined(CONFIG_USER_ONLY)
388 #define TARGET_PAGE_BITS 12
390 /* The ARM MMU allows 1k pages. */
391 /* ??? Linux doesn't actually use these, and they're deprecated in recent
392 architecture revisions. Maybe a configure option to disable them. */
393 #define TARGET_PAGE_BITS 10
396 #define CPUState CPUARMState
397 #define cpu_init cpu_arm_init
398 #define cpu_exec cpu_arm_exec
399 #define cpu_gen_code cpu_arm_gen_code
400 #define cpu_signal_handler cpu_arm_signal_handler
401 #define cpu_list arm_cpu_list
403 #define CPU_SAVE_VERSION 1
405 /* MMU modes definitions */
406 #define MMU_MODE0_SUFFIX _kernel
407 #define MMU_MODE1_SUFFIX _user
408 #define MMU_USER_IDX 1
409 static inline int cpu_mmu_index (CPUState *env)
411 return (env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_USR ? 1 : 0;
414 #if defined(CONFIG_USER_ONLY)
415 static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
418 env->regs[13] = newsp;
424 #include "exec-all.h"
426 static inline void cpu_pc_from_tb(CPUState *env, TranslationBlock *tb)
428 env->regs[15] = tb->pc;
431 static inline void cpu_get_tb_cpu_state(CPUState *env, target_ulong *pc,
432 target_ulong *cs_base, int *flags)
436 *flags = env->thumb | (env->vfp.vec_len << 1)
437 | (env->vfp.vec_stride << 4) | (env->condexec_bits << 8);
438 if ((env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR)
440 if (env->vfp.xregs[ARM_VFP_FPEXC] & (1 << 30))