1 #ifndef _ASM_IA64_IA32_PRIV_H
2 #define _ASM_IA64_IA32_PRIV_H
7 #ifdef CONFIG_IA32_SUPPORT
9 #include <linux/binfmts.h>
10 #include <linux/compat.h>
11 #include <linux/rbtree.h>
13 #include <asm/processor.h>
16 * 32 bit structures for IA32 support.
19 #define IA32_PAGE_SIZE (1UL << IA32_PAGE_SHIFT)
20 #define IA32_PAGE_MASK (~(IA32_PAGE_SIZE - 1))
21 #define IA32_PAGE_ALIGN(addr) (((addr) + IA32_PAGE_SIZE - 1) & IA32_PAGE_MASK)
22 #define IA32_CLOCKS_PER_SEC 100 /* Cast in stone for IA32 Linux */
25 * partially mapped pages provide precise accounting of which 4k sub pages
26 * are mapped and which ones are not, thereby improving IA-32 compatibility.
28 struct ia64_partial_page {
29 struct ia64_partial_page *next; /* linked list, sorted by address */
31 /* 64K is the largest "normal" page supported by ia64 ABI. So 4K*64
37 struct ia64_partial_page_list {
38 struct ia64_partial_page *pp_head; /* list head, points to the lowest
39 * addressed partial page */
40 struct rb_root ppl_rb;
41 struct ia64_partial_page *pp_hint; /* pp_hint->next is the last
42 * accessed partial page */
43 atomic_t pp_count; /* reference count */
46 #if PAGE_SHIFT > IA32_PAGE_SHIFT
47 struct ia64_partial_page_list* ia32_init_pp_list (void);
49 # define ia32_init_pp_list() 0
54 * As documented in the iBCS2 standard..
56 * The first part of "struct _fpstate" is just the
57 * normal i387 hardware setup, the extra "status"
58 * word is used to save the coprocessor status word
59 * before entering the handler.
62 unsigned short significand[4];
63 unsigned short exponent;
67 unsigned short significand[4];
68 unsigned short exponent;
69 unsigned short padding[3];
73 unsigned int element[4];
77 struct _fpstate_ia32 {
85 struct _fpreg_ia32 _st[8];
86 unsigned short status;
87 unsigned short magic; /* 0xffff = regular FPU data only */
89 /* FXSR FPU environment */
90 unsigned int _fxsr_env[6]; /* FXSR FPU env is ignored */
92 unsigned int reserved;
93 struct _fpxreg_ia32 _fxsr_st[8]; /* FXSR FPU reg data is ignored */
94 struct _xmmreg_ia32 _xmm[8];
95 unsigned int padding[56];
98 struct sigcontext_ia32 {
99 unsigned short gs, __gsh;
100 unsigned short fs, __fsh;
101 unsigned short es, __esh;
102 unsigned short ds, __dsh;
114 unsigned short cs, __csh;
116 unsigned int esp_at_signal;
117 unsigned short ss, __ssh;
118 unsigned int fpstate; /* really (struct _fpstate_ia32 *) */
119 unsigned int oldmask;
125 * IA32 (Pentium III/4) FXSR, SSE support
127 * Provide support for the GDB 5.0+ PTRACE_{GET|SET}FPXREGS requests for
128 * interacting with the FXSR-format floating point environment. Floating
129 * point data can be accessed in the regular format in the usual manner,
130 * and both the standard and SIMD floating point data can be accessed via
131 * the new ptrace requests. In either case, changes to the FPU environment
132 * will be reflected in the task's state as expected.
134 struct ia32_user_i387_struct {
142 /* 8*10 bytes for each FP-reg = 80 bytes */
143 struct _fpreg_ia32 st_space[8];
146 struct ia32_user_fxsr_struct {
157 int st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
158 int xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
163 #define IA32_SET_SA_HANDLER(ka,handler,restorer) \
164 ((ka)->sa.sa_handler = (__sighandler_t) \
165 (((unsigned long)(restorer) << 32) \
166 | ((handler) & 0xffffffff)))
167 #define IA32_SA_HANDLER(ka) ((unsigned long) (ka)->sa.sa_handler & 0xffffffff)
168 #define IA32_SA_RESTORER(ka) ((unsigned long) (ka)->sa.sa_handler >> 32)
170 #define __IA32_NR_sigreturn 119
171 #define __IA32_NR_rt_sigreturn 173
174 unsigned int sa_handler; /* Really a pointer, but need to deal with 32 bits */
175 unsigned int sa_flags;
176 unsigned int sa_restorer; /* Another 32 bit pointer */
177 compat_sigset_t sa_mask; /* A 32 bit mask */
180 struct old_sigaction32 {
181 unsigned int sa_handler; /* Really a pointer, but need to deal
183 compat_old_sigset_t sa_mask; /* A 32 bit mask */
184 unsigned int sa_flags;
185 unsigned int sa_restorer; /* Another 32 bit pointer */
188 typedef struct sigaltstack_ia32 {
191 unsigned int ss_size;
194 struct ucontext_ia32 {
195 unsigned int uc_flags;
196 unsigned int uc_link;
197 stack_ia32_t uc_stack;
198 struct sigcontext_ia32 uc_mcontext;
199 sigset_t uc_sigmask; /* mask last for extensibility */
203 unsigned long long st_dev;
204 unsigned char __pad0[4];
205 unsigned int __st_ino;
206 unsigned int st_mode;
207 unsigned int st_nlink;
210 unsigned long long st_rdev;
211 unsigned char __pad3[4];
212 unsigned int st_size_lo;
213 unsigned int st_size_hi;
214 unsigned int st_blksize;
215 unsigned int st_blocks; /* Number 512-byte blocks allocated. */
216 unsigned int __pad4; /* future possible st_blocks high bits */
217 unsigned int st_atime;
218 unsigned int st_atime_nsec;
219 unsigned int st_mtime;
220 unsigned int st_mtime_nsec;
221 unsigned int st_ctime;
222 unsigned int st_ctime_nsec;
223 unsigned int st_ino_lo;
224 unsigned int st_ino_hi;
227 typedef struct compat_siginfo {
233 int _pad[((128/sizeof(int)) - 3)];
237 unsigned int _pid; /* sender's pid */
238 unsigned int _uid; /* sender's uid */
241 /* POSIX.1b timers */
243 compat_timer_t _tid; /* timer id */
244 int _overrun; /* overrun count */
245 char _pad[sizeof(unsigned int) - sizeof(int)];
246 compat_sigval_t _sigval; /* same as below */
247 int _sys_private; /* not to be passed to user */
250 /* POSIX.1b signals */
252 unsigned int _pid; /* sender's pid */
253 unsigned int _uid; /* sender's uid */
254 compat_sigval_t _sigval;
259 unsigned int _pid; /* which child */
260 unsigned int _uid; /* sender's uid */
261 int _status; /* exit code */
262 compat_clock_t _utime;
263 compat_clock_t _stime;
266 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
268 unsigned int _addr; /* faulting insn/memory ref. */
273 int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
280 * IA-32 ELF specific definitions for IA-64.
283 #define _ASM_IA64_ELF_H /* Don't include elf.h */
285 #include <linux/sched.h>
288 * This is used to ensure we don't load something for the wrong architecture.
290 #define elf_check_arch(x) ((x)->e_machine == EM_386)
293 * These are used to set parameters in the core dumps.
295 #define ELF_CLASS ELFCLASS32
296 #define ELF_DATA ELFDATA2LSB
297 #define ELF_ARCH EM_386
299 #define IA32_STACK_TOP IA32_PAGE_OFFSET
300 #define IA32_GATE_OFFSET IA32_PAGE_OFFSET
301 #define IA32_GATE_END IA32_PAGE_OFFSET + PAGE_SIZE
304 * The system segments (GDT, TSS, LDT) have to be mapped below 4GB so the IA-32 engine can
307 #define IA32_GDT_OFFSET (IA32_PAGE_OFFSET + PAGE_SIZE)
308 #define IA32_TSS_OFFSET (IA32_PAGE_OFFSET + 2*PAGE_SIZE)
309 #define IA32_LDT_OFFSET (IA32_PAGE_OFFSET + 3*PAGE_SIZE)
311 #define ELF_EXEC_PAGESIZE IA32_PAGE_SIZE
314 * This is the location that an ET_DYN program is loaded if exec'ed.
315 * Typical use of this is to invoke "./ld.so someprog" to test out a
316 * new version of the loader. We need to make sure that it is out of
317 * the way of the program that it will "exec", and that there is
318 * sufficient room for the brk.
320 #define ELF_ET_DYN_BASE (IA32_PAGE_OFFSET/3 + 0x1000000)
322 void ia64_elf32_init(struct pt_regs *regs);
323 #define ELF_PLAT_INIT(_r, load_addr) ia64_elf32_init(_r)
325 /* This macro yields a bitmask that programs can use to figure out
326 what instruction set this CPU supports. */
329 /* This macro yields a string that ld.so will use to load
330 implementation specific libraries for optimization. Not terribly
331 relevant until we have real hardware to play with... */
332 #define ELF_PLATFORM NULL
335 # define SET_PERSONALITY(EX) \
336 (current->personality = PER_LINUX)
339 #define IA32_EFLAG 0x200
342 * IA-32 ELF specific definitions for IA-64.
345 #define __USER_CS 0x23
346 #define __USER_DS 0x2B
349 * The per-cpu GDT has 32 entries: see <asm-i386/segment.h>
351 #define GDT_ENTRIES 32
353 #define GDT_SIZE (GDT_ENTRIES * 8)
356 #define LDT_ENTRY (TSS_ENTRY + 1)
358 #define IA32_SEGSEL_RPL (0x3 << 0)
359 #define IA32_SEGSEL_TI (0x1 << 2)
360 #define IA32_SEGSEL_INDEX_SHIFT 3
362 #define _TSS ((unsigned long) TSS_ENTRY << IA32_SEGSEL_INDEX_SHIFT)
363 #define _LDT ((unsigned long) LDT_ENTRY << IA32_SEGSEL_INDEX_SHIFT)
365 #define IA32_SEG_BASE 16
366 #define IA32_SEG_TYPE 40
367 #define IA32_SEG_SYS 44
368 #define IA32_SEG_DPL 45
369 #define IA32_SEG_P 47
370 #define IA32_SEG_HIGH_LIMIT 48
371 #define IA32_SEG_AVL 52
372 #define IA32_SEG_DB 54
373 #define IA32_SEG_G 55
374 #define IA32_SEG_HIGH_BASE 56
376 #define IA32_SEG_DESCRIPTOR(base, limit, segtype, nonsysseg, dpl, segpresent, avl, segdb, gran) \
377 (((limit) & 0xffff) \
378 | (((unsigned long) (base) & 0xffffff) << IA32_SEG_BASE) \
379 | ((unsigned long) (segtype) << IA32_SEG_TYPE) \
380 | ((unsigned long) (nonsysseg) << IA32_SEG_SYS) \
381 | ((unsigned long) (dpl) << IA32_SEG_DPL) \
382 | ((unsigned long) (segpresent) << IA32_SEG_P) \
383 | ((((unsigned long) (limit) >> 16) & 0xf) << IA32_SEG_HIGH_LIMIT) \
384 | ((unsigned long) (avl) << IA32_SEG_AVL) \
385 | ((unsigned long) (segdb) << IA32_SEG_DB) \
386 | ((unsigned long) (gran) << IA32_SEG_G) \
387 | ((((unsigned long) (base) >> 24) & 0xff) << IA32_SEG_HIGH_BASE))
398 /* Unscramble an IA-32 segment descriptor into the IA-64 format. */
399 #define IA32_SEG_UNSCRAMBLE(sd) \
400 ( (((sd) >> IA32_SEG_BASE) & 0xffffff) | ((((sd) >> IA32_SEG_HIGH_BASE) & 0xff) << 24) \
401 | ((((sd) & 0xffff) | ((((sd) >> IA32_SEG_HIGH_LIMIT) & 0xf) << 16)) << SEG_LIM) \
402 | ((((sd) >> IA32_SEG_TYPE) & 0xf) << SEG_TYPE) \
403 | ((((sd) >> IA32_SEG_SYS) & 0x1) << SEG_SYS) \
404 | ((((sd) >> IA32_SEG_DPL) & 0x3) << SEG_DPL) \
405 | ((((sd) >> IA32_SEG_P) & 0x1) << SEG_P) \
406 | ((((sd) >> IA32_SEG_AVL) & 0x1) << SEG_AVL) \
407 | ((((sd) >> IA32_SEG_DB) & 0x1) << SEG_DB) \
408 | ((((sd) >> IA32_SEG_G) & 0x1) << SEG_G))
410 #define IA32_IOBASE 0x2000000000000000UL /* Virtual address for I/O space */
412 #define IA32_CR0 0x80000001 /* Enable PG and PE bits */
413 #define IA32_CR4 0x600 /* MMXEX and FXSR on */
416 * IA32 floating point control registers starting values
419 #define IA32_FSR_DEFAULT 0x55550000 /* set all tag bits */
420 #define IA32_FCR_DEFAULT 0x17800000037fUL /* extended precision, all masks */
422 #define IA32_PTRACE_GETREGS 12
423 #define IA32_PTRACE_SETREGS 13
424 #define IA32_PTRACE_GETFPREGS 14
425 #define IA32_PTRACE_SETFPREGS 15
426 #define IA32_PTRACE_GETFPXREGS 18
427 #define IA32_PTRACE_SETFPXREGS 19
429 #define ia32_start_thread(regs,new_ip,new_sp) do { \
431 ia64_psr(regs)->cpl = 3; /* set user mode */ \
432 ia64_psr(regs)->ri = 0; /* clear return slot number */ \
433 ia64_psr(regs)->is = 1; /* IA-32 instruction set */ \
434 regs->cr_iip = new_ip; \
435 regs->ar_rsc = 0xc; /* enforced lazy mode, priv. level 3 */ \
438 regs->r12 = new_sp; \
442 * Local Descriptor Table (LDT) related declarations.
445 #define IA32_LDT_ENTRIES 8192 /* Maximum number of LDT entries supported. */
446 #define IA32_LDT_ENTRY_SIZE 8 /* The size of each LDT entry. */
448 #define LDT_entry_a(info) \
449 ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
451 #define LDT_entry_b(info) \
452 (((info)->base_addr & 0xff000000) | \
453 (((info)->base_addr & 0x00ff0000) >> 16) | \
454 ((info)->limit & 0xf0000) | \
455 (((info)->read_exec_only ^ 1) << 9) | \
456 ((info)->contents << 10) | \
457 (((info)->seg_not_present ^ 1) << 15) | \
458 ((info)->seg_32bit << 22) | \
459 ((info)->limit_in_pages << 23) | \
460 ((info)->useable << 20) | \
463 #define LDT_empty(info) ( \
464 (info)->base_addr == 0 && \
465 (info)->limit == 0 && \
466 (info)->contents == 0 && \
467 (info)->read_exec_only == 1 && \
468 (info)->seg_32bit == 0 && \
469 (info)->limit_in_pages == 0 && \
470 (info)->seg_not_present == 1 && \
471 (info)->useable == 0 )
474 load_TLS (struct thread_struct *t, unsigned int cpu)
476 extern unsigned long *cpu_gdt_table[NR_CPUS];
478 memcpy(cpu_gdt_table[cpu] + GDT_ENTRY_TLS_MIN + 0, &t->tls_array[0], sizeof(long));
479 memcpy(cpu_gdt_table[cpu] + GDT_ENTRY_TLS_MIN + 1, &t->tls_array[1], sizeof(long));
480 memcpy(cpu_gdt_table[cpu] + GDT_ENTRY_TLS_MIN + 2, &t->tls_array[2], sizeof(long));
483 struct ia32_user_desc {
484 unsigned int entry_number;
485 unsigned int base_addr;
487 unsigned int seg_32bit:1;
488 unsigned int contents:2;
489 unsigned int read_exec_only:1;
490 unsigned int limit_in_pages:1;
491 unsigned int seg_not_present:1;
492 unsigned int useable:1;
497 extern void ia32_init_addr_space (struct pt_regs *regs);
498 extern int ia32_setup_arg_pages (struct linux_binprm *bprm, int exec_stack);
499 extern unsigned long ia32_do_mmap (struct file *, unsigned long, unsigned long, int, int, loff_t);
500 extern void ia32_load_segment_descriptors (struct task_struct *task);
502 #define ia32f2ia64f(dst,src) \
506 ia64_stf_spill(dst, 6); \
509 #define ia64f2ia32f(dst,src) \
511 ia64_ldf_fill(6, src); \
516 struct user_regs_struct32 {
517 __u32 ebx, ecx, edx, esi, edi, ebp, eax;
518 unsigned short ds, __ds, es, __es;
519 unsigned short fs, __fs, gs, __gs;
521 unsigned short cs, __cs;
523 unsigned short ss, __ss;
526 /* Prototypes for use in elfcore32.h */
527 extern int save_ia32_fpstate (struct task_struct *, struct ia32_user_i387_struct __user *);
528 extern int save_ia32_fpxstate (struct task_struct *, struct ia32_user_fxsr_struct __user *);
530 #endif /* !CONFIG_IA32_SUPPORT */
532 #endif /* _ASM_IA64_IA32_PRIV_H */