/[gxemul]/trunk/src/include/cpu.h
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revision 6 by dpavlin, Mon Oct 8 16:18:11 2007 UTC revision 30 by dpavlin, Mon Oct 8 16:20:40 2007 UTC
# Line 2  Line 2 
2  #define CPU_H  #define CPU_H
3    
4  /*  /*
5   *  Copyright (C) 2005  Anders Gavare.  All rights reserved.   *  Copyright (C) 2005-2006  Anders Gavare.  All rights reserved.
6   *   *
7   *  Redistribution and use in source and binary forms, with or without   *  Redistribution and use in source and binary forms, with or without
8   *  modification, are permitted provided that the following conditions are met:   *  modification, are permitted provided that the following conditions are met:
# Line 28  Line 28 
28   *  SUCH DAMAGE.   *  SUCH DAMAGE.
29   *   *
30   *   *
31   *  $Id: cpu.h,v 1.23 2005/06/02 00:08:43 debug Exp $   *  $Id: cpu.h,v 1.90 2006/08/12 11:43:13 debug Exp $
32   *   *
33   *  See cpu.c.   *  CPU-related definitions.
34   */   */
35    
36    
# Line 38  Line 38 
38  #include <inttypes.h>  #include <inttypes.h>
39  #include <sys/time.h>  #include <sys/time.h>
40    
41  /*  This is needed for undefining 'mips' or 'ppc', on weird systems:  */  /*  This is needed for undefining 'mips', 'ppc' etc. on weird systems:  */
42  #include "../../config.h"  #include "../../config.h"
43    
44    /*
45     *  Dyntrans misc declarations, used throughout the dyntrans code.
46     *
47     *  Note that there is place for all instruction calls within a page,
48     *  and then 2 more. The first one of these "extra" instruction slots is
49     *  the end-of-page slot. It transfers control to the first instruction
50     *  slot on the next (virtual) page.
51     *
52     *  The second of these extra instruction slots is an additional
53     *  end-of-page slot for delay-slot architectures. On e.g. MIPS, a branch
54     *  instruction can "nullify" (skip) the delay-slot. If the end-of-page
55     *  slot is skipped, then we end up one step after that. That's where the
56     *  end_of_page2 slot is. :)
57     *
58     *  next_ofs points to the next page in a chain of possible pages.
59     *  (several pages can be in the same chain, but only one matches the
60     *  specific physaddr.)
61     *
62     *  translations is a tiny bitmap indicating which parts of the page have
63     *  actual translations. Bit 0 corresponds to the lowest 1/32th of the page,
64     *  bit 1 to the second-lowest 1/32th, and so on.
65     */
66    #define DYNTRANS_MISC_DECLARATIONS(arch,ARCH,addrtype)  struct \
67            arch ## _instr_call {                                   \
68                    void    (*f)(struct cpu *, struct arch ## _instr_call *); \
69                    size_t  arg[ARCH ## _N_IC_ARGS];                        \
70            };                                                              \
71                                                                            \
72            /*  Translation cache struct for each physical page:  */        \
73            struct arch ## _tc_physpage {                                   \
74                    struct arch ## _instr_call ics[ARCH ## _IC_ENTRIES_PER_PAGE+2];\
75                    uint32_t        next_ofs;       /*  (0 for end of chain)  */ \
76                    uint32_t        translations;                           \
77                    addrtype        physaddr;                               \
78            };                                                              \
79                                                                            \
80            struct arch ## _vpg_tlb_entry {                                 \
81                    uint8_t         valid;                                  \
82                    uint8_t         writeflag;                              \
83                    addrtype        vaddr_page;                             \
84                    addrtype        paddr_page;                             \
85                    unsigned char   *host_page;                             \
86            };
87    
88    #define DYNTRANS_MISC64_DECLARATIONS(arch,ARCH,tlbindextype)            \
89            struct arch ## _l3_64_table {                                   \
90                    unsigned char   *host_load[1 << ARCH ## _L3N];          \
91                    unsigned char   *host_store[1 << ARCH ## _L3N];         \
92                    uint64_t        phys_addr[1 << ARCH ## _L3N];           \
93                    tlbindextype    vaddr_to_tlbindex[1 << ARCH ## _L3N];   \
94                    struct arch ## _tc_physpage *phys_page[1 << ARCH ## _L3N]; \
95                    struct arch ## _l3_64_table     *next;                  \
96                    int             refcount;                               \
97            };                                                              \
98            struct arch ## _l2_64_table {                                   \
99                    struct arch ## _l3_64_table     *l3[1 << ARCH ## _L2N]; \
100                    struct arch ## _l2_64_table     *next;                  \
101                    int                             refcount;               \
102            };
103    
104    /*
105     *  Dyntrans "Instruction Translation Cache":
106     *
107     *  cur_physpage is a pointer to the current physpage. (It _HAPPENS_ to
108     *  be the same as cur_ic_page, because all the instrcalls should be placed
109     *  first in the physpage struct!)
110     *
111     *  cur_ic_page is a pointer to an array of xxx_IC_ENTRIES_PER_PAGE
112     *  instruction call entries.
113     *
114     *  next_ic points to the next such instruction call to be executed.
115     *
116     *  combination_check, when set to non-NULL, is executed automatically after
117     *  an instruction has been translated. (It check for combinations of
118     *  instructions; low_addr is the offset of the translated instruction in the
119     *  current page, NOT shifted right.)
120     */
121    #define DYNTRANS_ITC(arch)      struct arch ## _tc_physpage *cur_physpage;  \
122                                    struct arch ## _instr_call  *cur_ic_page;   \
123                                    struct arch ## _instr_call  *next_ic;       \
124                                    struct arch ## _tc_physpage *physpage_template;\
125                                    void (*combination_check)(struct cpu *,     \
126                                        struct arch ## _instr_call *, int low_addr);
127    
128    /*
129     *  Virtual -> physical -> host address translation TLB entries:
130     *  ------------------------------------------------------------
131     *
132     *  Regardless of whether 32-bit or 64-bit address translation is used, the
133     *  same TLB entry structure is used.
134     */
135    #define VPH_TLBS(arch,ARCH)                                             \
136            struct arch ## _vpg_tlb_entry                                   \
137                vph_tlb_entry[ARCH ## _MAX_VPH_TLB_ENTRIES];
138    
139    /*
140     *  32-bit dyntrans emulated Virtual -> physical -> host address translation:
141     *  -------------------------------------------------------------------------
142     *
143     *  This stuff assumes that 4 KB pages are used. 20 bits to select a page
144     *  means just 1 M entries needed. This is small enough that a couple of
145     *  full-size tables can fit in virtual memory on modern hosts (both 32-bit
146     *  and 64-bit hosts). :-)
147     *
148     *  Usage: e.g. VPH32(arm,ARM,uint32_t,uint8_t)
149     *           or VPH32(sparc,SPARC,uint64_t,uint16_t)
150     *
151     *  The vph_tlb_entry entries are cpu dependent tlb entries.
152     *
153     *  The host_load and host_store entries point to host pages; the phys_addr
154     *  entries are uint32_t or uint64_t (emulated physical addresses).
155     *
156     *  phys_page points to translation cache physpages.
157     *
158     *  vaddr_to_tlbindex is a virtual address to tlb index hint table.
159     *  The values in this array are the tlb index plus 1, so a value of, say,
160     *  3 means tlb index 2. A value of 0 would mean a tlb index of -1, which
161     *  is not a valid index. (I.e. no hit.)
162     */
163    #define N_VPH32_ENTRIES         1048576
164    #define VPH32(arch,ARCH,paddrtype,tlbindextype)                         \
165            unsigned char           *host_load[N_VPH32_ENTRIES];            \
166            unsigned char           *host_store[N_VPH32_ENTRIES];           \
167            paddrtype               phys_addr[N_VPH32_ENTRIES];             \
168            struct arch ## _tc_physpage  *phys_page[N_VPH32_ENTRIES];       \
169            tlbindextype            vaddr_to_tlbindex[N_VPH32_ENTRIES];
170    
171    /*
172     *  64-bit dyntrans emulated Virtual -> physical -> host address translation:
173     *  -------------------------------------------------------------------------
174     *
175     *  Usage: e.g. VPH64(alpha,ALPHA,uint8_t)
176     *           or VPH64(sparc,SPARC,uint16_t)
177     *
178     *  l1_64 is an array containing poiners to l2 tables.
179     *
180     *  l2_64_dummy is a pointer to a "dummy l2 table". Instead of having NULL
181     *  pointers in l1_64 for unused slots, a pointer to the dummy table can be
182     *  used.
183     */
184    #define DYNTRANS_L1N            17
185    #define VPH64(arch,ARCH,tlbindextype)                                   \
186            struct arch ## _l3_64_table     *l3_64_dummy;                   \
187            struct arch ## _l3_64_table     *next_free_l3;                  \
188            struct arch ## _l2_64_table     *l2_64_dummy;                   \
189            struct arch ## _l2_64_table     *next_free_l2;                  \
190            struct arch ## _l2_64_table     *l1_64[1 << DYNTRANS_L1N];
191    
192    
193    /*  Include all CPUs' header files here:  */
194  #include "cpu_alpha.h"  #include "cpu_alpha.h"
195  #include "cpu_arm.h"  #include "cpu_arm.h"
196    #include "cpu_avr.h"
197  #include "cpu_hppa.h"  #include "cpu_hppa.h"
198    #include "cpu_i960.h"
199    #include "cpu_ia64.h"
200    #include "cpu_m68k.h"
201  #include "cpu_mips.h"  #include "cpu_mips.h"
202  #include "cpu_ppc.h"  #include "cpu_ppc.h"
203    #include "cpu_sh.h"
204  #include "cpu_sparc.h"  #include "cpu_sparc.h"
205  #include "cpu_urisc.h"  #include "cpu_transputer.h"
206  #include "cpu_x86.h"  #include "cpu_x86.h"
207    
208  struct cpu;  struct cpu;
# Line 56  struct machine; Line 211  struct machine;
211  struct memory;  struct memory;
212    
213    
214    /*
215     *  cpu_family
216     *  ----------
217     *
218     *  This structure consists of various pointers to functions, performing
219     *  architecture-specific functions.
220     *
221     *  Except for the next and arch fields at the top, all fields in the
222     *  cpu_family struct are filled in by ecah CPU family's init function.
223     */
224  struct cpu_family {  struct cpu_family {
225          struct cpu_family       *next;          struct cpu_family       *next;
226          int                     arch;          int                     arch;
227    
228          /*  These are filled in by each CPU family's init function:  */          /*  Familty name, e.g. "MIPS", "Alpha" etc.  */
229          char                    *name;          char                    *name;
230          struct cpu              *(*cpu_new)(struct memory *mem,  
231            /*  Fill in architecture specific parts of a struct cpu.  */
232            int                     (*cpu_new)(struct cpu *cpu, struct memory *mem,
233                                      struct machine *machine,                                      struct machine *machine,
234                                      int cpu_id, char *cpu_type_name);                                      int cpu_id, char *cpu_type_name);
235    
236            /*  Initialize various translation tables.  */
237            void                    (*init_tables)(struct cpu *cpu);
238    
239            /*  List available CPU types for this architecture.  */
240          void                    (*list_available_types)(void);          void                    (*list_available_types)(void);
241    
242            /*  Read or write a CPU register, given a name.  */
243          void                    (*register_match)(struct machine *m,          void                    (*register_match)(struct machine *m,
244                                      char *name, int writeflag,                                      char *name, int writeflag,
245                                      uint64_t *valuep, int *match_register);                                      uint64_t *valuep, int *match_register);
246    
247            /*  Disassemble an instruction.  */
248          int                     (*disassemble_instr)(struct cpu *cpu,          int                     (*disassemble_instr)(struct cpu *cpu,
249                                      unsigned char *instr, int running,                                      unsigned char *instr, int running,
250                                      uint64_t dumpaddr, int bintrans);                                      uint64_t dumpaddr);
251    
252            /*  Dump CPU registers in readable format.  */
253          void                    (*register_dump)(struct cpu *cpu,          void                    (*register_dump)(struct cpu *cpu,
254                                      int gprs, int coprocs);                                      int gprs, int coprocs);
255          int                     (*run)(struct emul *emul,  
256                                      struct machine *machine);          /*  Dump generic CPU info in readable format.  */
257          void                    (*dumpinfo)(struct cpu *cpu);          void                    (*dumpinfo)(struct cpu *cpu);
258          void                    (*show_full_statistics)(struct machine *m);  
259            /*  Dump TLB data for CPU id x.  */
260          void                    (*tlbdump)(struct machine *m, int x,          void                    (*tlbdump)(struct machine *m, int x,
261                                      int rawflag);                                      int rawflag);
262    
263            /*  Assert an interrupt.  */
264          int                     (*interrupt)(struct cpu *cpu, uint64_t irq_nr);          int                     (*interrupt)(struct cpu *cpu, uint64_t irq_nr);
265    
266            /*  De-assert an interrupt.  */
267          int                     (*interrupt_ack)(struct cpu *cpu,          int                     (*interrupt_ack)(struct cpu *cpu,
268                                      uint64_t irq_nr);                                      uint64_t irq_nr);
269    
270            /*  Print architecture-specific function call arguments.
271                (This is called for each function call, if running with -t.)  */
272            void                    (*functioncall_trace)(struct cpu *,
273                                        uint64_t f, int n_args);
274    
275            /*  GDB command handler.  */
276            char                    *(*gdb_stub)(struct cpu *, char *cmd);
277  };  };
278    
279    
280    /*
281     *  More dyntrans stuff:
282     *
283     *  The translation cache begins with N_BASE_TABLE_ENTRIES uint32_t offsets
284     *  into the cache, for possible translation cache structs for physical pages.
285     */
286    
287    /*  Meaning of delay_slot:  */
288    #define NOT_DELAYED                     0
289    #define DELAYED                         1
290    #define TO_BE_DELAYED                   2
291    #define EXCEPTION_IN_DELAY_SLOT         8
292    
293    #define N_SAFE_DYNTRANS_LIMIT_SHIFT     14
294    #define N_SAFE_DYNTRANS_LIMIT   ((1 << (N_SAFE_DYNTRANS_LIMIT_SHIFT - 1)) - 1)
295    
296    #define DYNTRANS_CACHE_SIZE             (24*1048576)
297    #define DYNTRANS_CACHE_MARGIN           300000
298    
299    #define N_BASE_TABLE_ENTRIES            32768
300    #define PAGENR_TO_TABLE_INDEX(a)        ((a) & (N_BASE_TABLE_ENTRIES-1))
301    
302    
303    /*
304     *  The generic CPU struct:
305     */
306    
307  struct cpu {  struct cpu {
308          /*  Pointer back to the machine this CPU is in:  */          /*  Pointer back to the machine this CPU is in:  */
309          struct machine  *machine;          struct machine  *machine;
310    
311            /*  CPU-specific name, e.g. "R2000", "21164PC", etc.  */
312            char            *name;
313    
314            /*  EMUL_LITTLE_ENDIAN or EMUL_BIG_ENDIAN.  */
315          int             byte_order;          int             byte_order;
316          int             running;  
317          int             dead;          /*  0-based CPU id, in an emulated SMP system.  */
         int             bootstrap_cpu_flag;  
318          int             cpu_id;          int             cpu_id;
         char            *name;  
319    
320            /*  0 for emulated 64-bit CPUs, 1 for 32-bit.  */
321            int             is_32bit;
322    
323            /*  1 while running, 0 when paused/stopped.  */
324            int             running;
325    
326            /*  A pointer to the main memory connected to this CPU.  */
327          struct memory   *mem;          struct memory   *mem;
328    
329            int             (*run_instr)(struct cpu *cpu);
330          int             (*memory_rw)(struct cpu *cpu,          int             (*memory_rw)(struct cpu *cpu,
331                              struct memory *mem, uint64_t vaddr,                              struct memory *mem, uint64_t vaddr,
332                              unsigned char *data, size_t len,                              unsigned char *data, size_t len,
333                              int writeflag, int cache_flags);                              int writeflag, int cache_flags);
334          int             (*translate_address)(struct cpu *, uint64_t vaddr,          int             (*translate_v2p)(struct cpu *, uint64_t vaddr,
335                              uint64_t *return_addr, int flags);                              uint64_t *return_paddr, int flags);
336          void            (*useremul_syscall)(struct cpu *cpu,          void            (*update_translation_table)(struct cpu *,
337                              uint32_t code);                              uint64_t vaddr_page, unsigned char *host_page,
338                                int writeflag, uint64_t paddr_page);
339            void            (*invalidate_translation_caches)(struct cpu *,
340                                uint64_t paddr, int flags);
341            void            (*invalidate_code_translation)(struct cpu *,
342                                uint64_t paddr, int flags);
343            void            (*useremul_syscall)(struct cpu *cpu, uint32_t code);
344            int             (*instruction_has_delayslot)(struct cpu *cpu,
345                                unsigned char *ib);
346    
347          /*  Things that all CPU families have:  */          /*  The program counter. (For 32-bit modes, not all bits are used.)  */
348          uint64_t        pc;          uint64_t        pc;
349    
350          /*  CPU-family dependant:  */          /*  See comment further up.  */
351            int             delay_slot;
352    
353            /*  The current depth of function call tracing.  */
354            int             trace_tree_depth;
355    
356            /*
357             *  If is_halted is true when an interrupt trap occurs, the pointer
358             *  to the next instruction to execute will be the instruction
359             *  following the halt instruction, not the halt instrucion itself.
360             */
361            int             is_halted;
362    
363            /*
364             *  Dynamic translation:
365             *
366             *  The number of translated instructions is assumed to be 1 per
367             *  instruction call. For each case where this differs from the
368             *  truth, n_translated_instrs should be modified. E.g. if 1000
369             *  instruction calls are done, and n_translated_instrs is 50, then
370             *  1050 emulated instructions were actually executed.
371             *
372             *  Note that it can also be adjusted negatively, that is, the way
373             *  to "get out" of a dyntrans loop is to set the current instruction
374             *  call pointer to the "nothing" instruction. This instruction
375             *  _decreases_ n_translated_instrs. That way, once the dyntrans loop
376             *  exits, only real instructions will be counted, and not the
377             *  "nothing" instructions.
378             */
379            int             n_translated_instrs;
380            unsigned char   *translation_cache;
381            size_t          translation_cache_cur_ofs;
382    
383            /*
384             *  CPU-family dependent:
385             *
386             *  These contain everything ranging from registers, memory management,
387             *  status words, etc.
388             */
389          union {          union {
390                  struct alpha_cpu   alpha;                  struct alpha_cpu      alpha;
391                  struct arm_cpu     arm;                  struct arm_cpu        arm;
392                  struct hppa_cpu    hppa;                  struct avr_cpu        avr;
393                  struct mips_cpu    mips;                  struct hppa_cpu       hppa;
394                  struct ppc_cpu     ppc;                  struct i960_cpu       i960;
395                  struct sparc_cpu   sparc;                  struct ia64_cpu       ia64;
396                  struct urisc_cpu   urisc;                  struct m68k_cpu       m68k;
397                  struct x86_cpu     x86;                  struct mips_cpu       mips;
398                    struct ppc_cpu        ppc;
399                    struct sh_cpu         sh;
400                    struct sparc_cpu      sparc;
401                    struct transputer_cpu transputer;
402                    struct x86_cpu        x86;
403          } cd;          } cd;
404  };  };
405    
# Line 127  struct cpu { Line 407  struct cpu {
407  /*  cpu.c:  */  /*  cpu.c:  */
408  struct cpu *cpu_new(struct memory *mem, struct machine *machine,  struct cpu *cpu_new(struct memory *mem, struct machine *machine,
409          int cpu_id, char *cpu_type_name);          int cpu_id, char *cpu_type_name);
 void cpu_show_full_statistics(struct machine *m);  
410  void cpu_tlbdump(struct machine *m, int x, int rawflag);  void cpu_tlbdump(struct machine *m, int x, int rawflag);
411  void cpu_register_match(struct machine *m, char *name,  void cpu_register_match(struct machine *m, char *name,
412          int writeflag, uint64_t *valuep, int *match_register);          int writeflag, uint64_t *valuep, int *match_register);
413  void cpu_register_dump(struct machine *m, struct cpu *cpu,  void cpu_register_dump(struct machine *m, struct cpu *cpu,
414          int gprs, int coprocs);          int gprs, int coprocs);
415  int cpu_disassemble_instr(struct machine *m, struct cpu *cpu,  int cpu_disassemble_instr(struct machine *m, struct cpu *cpu,
416          unsigned char *instr, int running, uint64_t addr, int bintrans);          unsigned char *instr, int running, uint64_t addr);
417    char *cpu_gdb_stub(struct cpu *cpu, char *cmd);
418  int cpu_interrupt(struct cpu *cpu, uint64_t irq_nr);  int cpu_interrupt(struct cpu *cpu, uint64_t irq_nr);
419  int cpu_interrupt_ack(struct cpu *cpu, uint64_t irq_nr);  int cpu_interrupt_ack(struct cpu *cpu, uint64_t irq_nr);
420  void cpu_run_init(struct emul *emul, struct machine *machine);  void cpu_functioncall_trace(struct cpu *cpu, uint64_t f);
421  int cpu_run(struct emul *emul, struct machine *machine);  void cpu_functioncall_trace_return(struct cpu *cpu);
422  void cpu_run_deinit(struct emul *emul, struct machine *machine);  void cpu_create_or_reset_tc(struct cpu *cpu);
423    void cpu_run_init(struct machine *machine);
424    void cpu_run_deinit(struct machine *machine);
425  void cpu_dumpinfo(struct machine *m, struct cpu *cpu);  void cpu_dumpinfo(struct machine *m, struct cpu *cpu);
426  void cpu_list_available_types(void);  void cpu_list_available_types(void);
427  void cpu_show_cycles(struct machine *machine,  void cpu_show_cycles(struct machine *machine, int forced);
         struct timeval *starttime, int64_t ncycles, int forced);  
428  struct cpu_family *cpu_family_ptr_by_number(int arch);  struct cpu_family *cpu_family_ptr_by_number(int arch);
429  void cpu_init(void);  void cpu_init(void);
430    
431    
432    #define JUST_MARK_AS_NON_WRITABLE       1
433    #define INVALIDATE_ALL                  2
434    #define INVALIDATE_PADDR                4
435    #define INVALIDATE_VADDR                8
436    #define INVALIDATE_VADDR_UPPER4         16      /*  useful for PPC emulation  */
437    
438    
439    #define CPU_FAMILY_INIT(n,s)    int n ## _cpu_family_init(              \
440            struct cpu_family *fp) {                                        \
441            /*  Fill in the cpu_family struct with valid data for this arch.  */ \
442            fp->name = s;                                                   \
443            fp->cpu_new = n ## _cpu_new;                                    \
444            fp->list_available_types = n ## _cpu_list_available_types;      \
445            fp->register_match = n ## _cpu_register_match;                  \
446            fp->disassemble_instr = n ## _cpu_disassemble_instr;            \
447            fp->register_dump = n ## _cpu_register_dump;                    \
448            fp->dumpinfo = n ## _cpu_dumpinfo;                              \
449            fp->interrupt = n ## _cpu_interrupt;                            \
450            fp->interrupt_ack = n ## _cpu_interrupt_ack;                    \
451            fp->functioncall_trace = n ## _cpu_functioncall_trace;          \
452            fp->gdb_stub = n ## _cpu_gdb_stub;                              \
453            fp->tlbdump = n ## _cpu_tlbdump;                                \
454            fp->init_tables = n ## _cpu_init_tables;                        \
455            return 1;                                                       \
456            }
457    
458    
459  #endif  /*  CPU_H  */  #endif  /*  CPU_H  */
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