1 #ifndef _ASM_IA64_IA32_PRIV_H
2 #define _ASM_IA64_IA32_PRIV_H
4 #include <linux/config.h>
8 #ifdef CONFIG_IA32_SUPPORT
10 #include <linux/binfmts.h>
11 #include <linux/compat.h>
12 #include <linux/rbtree.h>
14 #include <asm/processor.h>
17 * 32 bit structures for IA32 support.
20 #define IA32_PAGE_SIZE (1UL << IA32_PAGE_SHIFT)
21 #define IA32_PAGE_MASK (~(IA32_PAGE_SIZE - 1))
22 #define IA32_PAGE_ALIGN(addr) (((addr) + IA32_PAGE_SIZE - 1) & IA32_PAGE_MASK)
23 #define IA32_CLOCKS_PER_SEC 100 /* Cast in stone for IA32 Linux */
26 * partially mapped pages provide precise accounting of which 4k sub pages
27 * are mapped and which ones are not, thereby improving IA-32 compatibility.
30 struct partial_page *next; /* linked list, sorted by address */
32 /* 64K is the largest "normal" page supported by ia64 ABI. So 4K*32
38 struct partial_page_list {
39 struct partial_page *pp_head; /* list head, points to the lowest
40 * addressed partial page */
41 struct rb_root ppl_rb;
42 struct partial_page *pp_hint; /* pp_hint->next is the last
43 * accessed partial page */
44 atomic_t pp_count; /* reference count */
47 #if PAGE_SHIFT > IA32_PAGE_SHIFT
48 struct partial_page_list* ia32_init_pp_list (void);
50 # define ia32_init_pp_list() 0
55 * As documented in the iBCS2 standard..
57 * The first part of "struct _fpstate" is just the
58 * normal i387 hardware setup, the extra "status"
59 * word is used to save the coprocessor status word
60 * before entering the handler.
63 unsigned short significand[4];
64 unsigned short exponent;
68 unsigned short significand[4];
69 unsigned short exponent;
70 unsigned short padding[3];
74 unsigned int element[4];
78 struct _fpstate_ia32 {
86 struct _fpreg_ia32 _st[8];
87 unsigned short status;
88 unsigned short magic; /* 0xffff = regular FPU data only */
90 /* FXSR FPU environment */
91 unsigned int _fxsr_env[6]; /* FXSR FPU env is ignored */
93 unsigned int reserved;
94 struct _fpxreg_ia32 _fxsr_st[8]; /* FXSR FPU reg data is ignored */
95 struct _xmmreg_ia32 _xmm[8];
96 unsigned int padding[56];
99 struct sigcontext_ia32 {
100 unsigned short gs, __gsh;
101 unsigned short fs, __fsh;
102 unsigned short es, __esh;
103 unsigned short ds, __dsh;
115 unsigned short cs, __csh;
117 unsigned int esp_at_signal;
118 unsigned short ss, __ssh;
119 unsigned int fpstate; /* really (struct _fpstate_ia32 *) */
120 unsigned int oldmask;
126 * IA32 (Pentium III/4) FXSR, SSE support
128 * Provide support for the GDB 5.0+ PTRACE_{GET|SET}FPXREGS requests for
129 * interacting with the FXSR-format floating point environment. Floating
130 * point data can be accessed in the regular format in the usual manner,
131 * and both the standard and SIMD floating point data can be accessed via
132 * the new ptrace requests. In either case, changes to the FPU environment
133 * will be reflected in the task's state as expected.
135 struct ia32_user_i387_struct {
143 /* 8*10 bytes for each FP-reg = 80 bytes */
144 struct _fpreg_ia32 st_space[8];
147 struct ia32_user_fxsr_struct {
158 int st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
159 int xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
164 #define IA32_SET_SA_HANDLER(ka,handler,restorer) \
165 ((ka)->sa.sa_handler = (__sighandler_t) \
166 (((unsigned long)(restorer) << 32) \
167 | ((handler) & 0xffffffff)))
168 #define IA32_SA_HANDLER(ka) ((unsigned long) (ka)->sa.sa_handler & 0xffffffff)
169 #define IA32_SA_RESTORER(ka) ((unsigned long) (ka)->sa.sa_handler >> 32)
172 unsigned int sa_handler; /* Really a pointer, but need to deal with 32 bits */
173 unsigned int sa_flags;
174 unsigned int sa_restorer; /* Another 32 bit pointer */
175 compat_sigset_t sa_mask; /* A 32 bit mask */
178 struct old_sigaction32 {
179 unsigned int sa_handler; /* Really a pointer, but need to deal
181 compat_old_sigset_t sa_mask; /* A 32 bit mask */
182 unsigned int sa_flags;
183 unsigned int sa_restorer; /* Another 32 bit pointer */
186 typedef struct sigaltstack_ia32 {
189 unsigned int ss_size;
192 struct ucontext_ia32 {
193 unsigned int uc_flags;
194 unsigned int uc_link;
195 stack_ia32_t uc_stack;
196 struct sigcontext_ia32 uc_mcontext;
197 sigset_t uc_sigmask; /* mask last for extensibility */
201 unsigned long long st_dev;
202 unsigned char __pad0[4];
203 unsigned int __st_ino;
204 unsigned int st_mode;
205 unsigned int st_nlink;
208 unsigned long long st_rdev;
209 unsigned char __pad3[4];
210 unsigned int st_size_lo;
211 unsigned int st_size_hi;
212 unsigned int st_blksize;
213 unsigned int st_blocks; /* Number 512-byte blocks allocated. */
214 unsigned int __pad4; /* future possible st_blocks high bits */
215 unsigned int st_atime;
216 unsigned int st_atime_nsec;
217 unsigned int st_mtime;
218 unsigned int st_mtime_nsec;
219 unsigned int st_ctime;
220 unsigned int st_ctime_nsec;
221 unsigned int st_ino_lo;
222 unsigned int st_ino_hi;
225 typedef union sigval32 {
227 unsigned int sival_ptr;
230 #define SIGEV_PAD_SIZE32 ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
232 typedef struct siginfo32 {
238 int _pad[((128/sizeof(int)) - 3)];
242 unsigned int _pid; /* sender's pid */
243 unsigned int _uid; /* sender's uid */
246 /* POSIX.1b timers */
248 timer_t _tid; /* timer id */
249 int _overrun; /* overrun count */
250 char _pad[sizeof(unsigned int) - sizeof(int)];
251 sigval_t32 _sigval; /* same as below */
252 int _sys_private; /* not to be passed to user */
255 /* POSIX.1b signals */
257 unsigned int _pid; /* sender's pid */
258 unsigned int _uid; /* sender's uid */
264 unsigned int _pid; /* which child */
265 unsigned int _uid; /* sender's uid */
266 int _status; /* exit code */
267 compat_clock_t _utime;
268 compat_clock_t _stime;
271 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
273 unsigned int _addr; /* faulting insn/memory ref. */
278 int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
284 typedef struct sigevent32 {
285 sigval_t32 sigev_value;
289 int _pad[SIGEV_PAD_SIZE32];
292 u32 _attribute; /* really pthread_attr_t */
297 struct old_linux32_dirent {
305 * IA-32 ELF specific definitions for IA-64.
308 #define _ASM_IA64_ELF_H /* Don't include elf.h */
310 #include <linux/sched.h>
311 #include <asm/processor.h>
314 * This is used to ensure we don't load something for the wrong architecture.
316 #define elf_check_arch(x) ((x)->e_machine == EM_386)
319 * These are used to set parameters in the core dumps.
321 #define ELF_CLASS ELFCLASS32
322 #define ELF_DATA ELFDATA2LSB
323 #define ELF_ARCH EM_386
325 #define IA32_PAGE_OFFSET 0xc0000000
326 #define IA32_STACK_TOP IA32_PAGE_OFFSET
329 * The system segments (GDT, TSS, LDT) have to be mapped below 4GB so the IA-32 engine can
332 #define IA32_GDT_OFFSET (IA32_PAGE_OFFSET)
333 #define IA32_TSS_OFFSET (IA32_PAGE_OFFSET + PAGE_SIZE)
334 #define IA32_LDT_OFFSET (IA32_PAGE_OFFSET + 2*PAGE_SIZE)
336 #define ELF_EXEC_PAGESIZE IA32_PAGE_SIZE
339 * This is the location that an ET_DYN program is loaded if exec'ed.
340 * Typical use of this is to invoke "./ld.so someprog" to test out a
341 * new version of the loader. We need to make sure that it is out of
342 * the way of the program that it will "exec", and that there is
343 * sufficient room for the brk.
345 #define ELF_ET_DYN_BASE (IA32_PAGE_OFFSET/3 + 0x1000000)
347 void ia64_elf32_init(struct pt_regs *regs);
348 #define ELF_PLAT_INIT(_r, load_addr) ia64_elf32_init(_r)
350 #define elf_addr_t u32
352 /* This macro yields a bitmask that programs can use to figure out
353 what instruction set this CPU supports. */
356 /* This macro yields a string that ld.so will use to load
357 implementation specific libraries for optimization. Not terribly
358 relevant until we have real hardware to play with... */
359 #define ELF_PLATFORM 0
362 # define SET_PERSONALITY(EX,IBCS2) \
363 (current->personality = (IBCS2) ? PER_SVR4 : PER_LINUX)
366 #define IA32_EFLAG 0x200
369 * IA-32 ELF specific definitions for IA-64.
372 #define __USER_CS 0x23
373 #define __USER_DS 0x2B
376 * The per-cpu GDT has 32 entries: see <asm-i386/segment.h>
378 #define GDT_ENTRIES 32
380 #define GDT_SIZE (GDT_ENTRIES * 8)
383 #define LDT_ENTRY (TSS_ENTRY + 1)
385 #define IA32_SEGSEL_RPL (0x3 << 0)
386 #define IA32_SEGSEL_TI (0x1 << 2)
387 #define IA32_SEGSEL_INDEX_SHIFT 3
389 #define _TSS ((unsigned long) TSS_ENTRY << IA32_SEGSEL_INDEX_SHIFT)
390 #define _LDT ((unsigned long) LDT_ENTRY << IA32_SEGSEL_INDEX_SHIFT)
392 #define IA32_SEG_BASE 16
393 #define IA32_SEG_TYPE 40
394 #define IA32_SEG_SYS 44
395 #define IA32_SEG_DPL 45
396 #define IA32_SEG_P 47
397 #define IA32_SEG_HIGH_LIMIT 48
398 #define IA32_SEG_AVL 52
399 #define IA32_SEG_DB 54
400 #define IA32_SEG_G 55
401 #define IA32_SEG_HIGH_BASE 56
403 #define IA32_SEG_DESCRIPTOR(base, limit, segtype, nonsysseg, dpl, segpresent, avl, segdb, gran) \
404 (((limit) & 0xffff) \
405 | (((unsigned long) (base) & 0xffffff) << IA32_SEG_BASE) \
406 | ((unsigned long) (segtype) << IA32_SEG_TYPE) \
407 | ((unsigned long) (nonsysseg) << IA32_SEG_SYS) \
408 | ((unsigned long) (dpl) << IA32_SEG_DPL) \
409 | ((unsigned long) (segpresent) << IA32_SEG_P) \
410 | ((((unsigned long) (limit) >> 16) & 0xf) << IA32_SEG_HIGH_LIMIT) \
411 | ((unsigned long) (avl) << IA32_SEG_AVL) \
412 | ((unsigned long) (segdb) << IA32_SEG_DB) \
413 | ((unsigned long) (gran) << IA32_SEG_G) \
414 | ((((unsigned long) (base) >> 24) & 0xff) << IA32_SEG_HIGH_BASE))
425 /* Unscramble an IA-32 segment descriptor into the IA-64 format. */
426 #define IA32_SEG_UNSCRAMBLE(sd) \
427 ( (((sd) >> IA32_SEG_BASE) & 0xffffff) | ((((sd) >> IA32_SEG_HIGH_BASE) & 0xff) << 24) \
428 | ((((sd) & 0xffff) | ((((sd) >> IA32_SEG_HIGH_LIMIT) & 0xf) << 16)) << SEG_LIM) \
429 | ((((sd) >> IA32_SEG_TYPE) & 0xf) << SEG_TYPE) \
430 | ((((sd) >> IA32_SEG_SYS) & 0x1) << SEG_SYS) \
431 | ((((sd) >> IA32_SEG_DPL) & 0x3) << SEG_DPL) \
432 | ((((sd) >> IA32_SEG_P) & 0x1) << SEG_P) \
433 | ((((sd) >> IA32_SEG_AVL) & 0x1) << SEG_AVL) \
434 | ((((sd) >> IA32_SEG_DB) & 0x1) << SEG_DB) \
435 | ((((sd) >> IA32_SEG_G) & 0x1) << SEG_G))
437 #define IA32_IOBASE 0x2000000000000000 /* Virtual address for I/O space */
439 #define IA32_CR0 0x80000001 /* Enable PG and PE bits */
440 #define IA32_CR4 0x600 /* MMXEX and FXSR on */
443 * IA32 floating point control registers starting values
446 #define IA32_FSR_DEFAULT 0x55550000 /* set all tag bits */
447 #define IA32_FCR_DEFAULT 0x17800000037fUL /* extended precision, all masks */
449 #define IA32_PTRACE_GETREGS 12
450 #define IA32_PTRACE_SETREGS 13
451 #define IA32_PTRACE_GETFPREGS 14
452 #define IA32_PTRACE_SETFPREGS 15
453 #define IA32_PTRACE_GETFPXREGS 18
454 #define IA32_PTRACE_SETFPXREGS 19
456 #define ia32_start_thread(regs,new_ip,new_sp) do { \
458 ia64_psr(regs)->cpl = 3; /* set user mode */ \
459 ia64_psr(regs)->ri = 0; /* clear return slot number */ \
460 ia64_psr(regs)->is = 1; /* IA-32 instruction set */ \
461 regs->cr_iip = new_ip; \
462 regs->ar_rsc = 0xc; /* enforced lazy mode, priv. level 3 */ \
465 regs->r12 = new_sp; \
469 * Local Descriptor Table (LDT) related declarations.
472 #define IA32_LDT_ENTRIES 8192 /* Maximum number of LDT entries supported. */
473 #define IA32_LDT_ENTRY_SIZE 8 /* The size of each LDT entry. */
475 #define LDT_entry_a(info) \
476 ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
478 #define LDT_entry_b(info) \
479 (((info)->base_addr & 0xff000000) | \
480 (((info)->base_addr & 0x00ff0000) >> 16) | \
481 ((info)->limit & 0xf0000) | \
482 (((info)->read_exec_only ^ 1) << 9) | \
483 ((info)->contents << 10) | \
484 (((info)->seg_not_present ^ 1) << 15) | \
485 ((info)->seg_32bit << 22) | \
486 ((info)->limit_in_pages << 23) | \
487 ((info)->useable << 20) | \
490 #define LDT_empty(info) ( \
491 (info)->base_addr == 0 && \
492 (info)->limit == 0 && \
493 (info)->contents == 0 && \
494 (info)->read_exec_only == 1 && \
495 (info)->seg_32bit == 0 && \
496 (info)->limit_in_pages == 0 && \
497 (info)->seg_not_present == 1 && \
498 (info)->useable == 0 )
501 load_TLS (struct thread_struct *t, unsigned int cpu)
503 extern unsigned long *cpu_gdt_table[NR_CPUS];
505 memcpy(cpu_gdt_table[cpu] + GDT_ENTRY_TLS_MIN + 0, &t->tls_array[0], sizeof(long));
506 memcpy(cpu_gdt_table[cpu] + GDT_ENTRY_TLS_MIN + 1, &t->tls_array[1], sizeof(long));
507 memcpy(cpu_gdt_table[cpu] + GDT_ENTRY_TLS_MIN + 2, &t->tls_array[2], sizeof(long));
510 struct ia32_user_desc {
511 unsigned int entry_number;
512 unsigned int base_addr;
514 unsigned int seg_32bit:1;
515 unsigned int contents:2;
516 unsigned int read_exec_only:1;
517 unsigned int limit_in_pages:1;
518 unsigned int seg_not_present:1;
519 unsigned int useable:1;
524 extern void ia32_init_addr_space (struct pt_regs *regs);
525 extern int ia32_setup_arg_pages (struct linux_binprm *bprm, int exec_stack);
526 extern unsigned long ia32_do_mmap (struct file *, unsigned long, unsigned long, int, int, loff_t);
527 extern void ia32_load_segment_descriptors (struct task_struct *task);
529 #define ia32f2ia64f(dst,src) \
533 ia64_stf_spill(dst, 6); \
536 #define ia64f2ia32f(dst,src) \
538 ia64_ldf_fill(6, src); \
543 struct user_regs_struct32 {
544 __u32 ebx, ecx, edx, esi, edi, ebp, eax;
545 unsigned short ds, __ds, es, __es;
546 unsigned short fs, __fs, gs, __gs;
548 unsigned short cs, __cs;
550 unsigned short ss, __ss;
553 /* Prototypes for use in elfcore32.h */
554 extern int save_ia32_fpstate (struct task_struct *tsk, struct ia32_user_i387_struct *save);
555 extern int save_ia32_fpxstate (struct task_struct *tsk, struct ia32_user_fxsr_struct *save);
557 #endif /* !CONFIG_IA32_SUPPORT */
559 #endif /* _ASM_IA64_IA32_PRIV_H */