1 #ifndef _UAPI_ASM_X86_VM86_H 2 #define _UAPI_ASM_X86_VM86_H 3 4 /* 5 * I'm guessing at the VIF/VIP flag usage, but hope that this is how 6 * the Pentium uses them. Linux will return from vm86 mode when both 7 * VIF and VIP is set. 8 * 9 * On a Pentium, we could probably optimize the virtual flags directly 10 * in the eflags register instead of doing it "by hand" in vflags... 11 * 12 * Linus 13 */ 14 15 #include <asm/processor-flags.h> 16 17 #define BIOSSEG 0x0f000 18 19 #define CPU_086 0 20 #define CPU_186 1 21 #define CPU_286 2 22 #define CPU_386 3 23 #define CPU_486 4 24 #define CPU_586 5 25 26 /* 27 * Return values for the 'vm86()' system call 28 */ 29 #define VM86_TYPE(retval) ((retval) & 0xff) 30 #define VM86_ARG(retval) ((retval) >> 8) 31 32 #define VM86_SIGNAL 0 /* return due to signal */ 33 #define VM86_UNKNOWN 1 /* unhandled GP fault 34 - IO-instruction or similar */ 35 #define VM86_INTx 2 /* int3/int x instruction (ARG = x) */ 36 #define VM86_STI 3 /* sti/popf/iret instruction enabled 37 virtual interrupts */ 38 39 /* 40 * Additional return values when invoking new vm86() 41 */ 42 #define VM86_PICRETURN 4 /* return due to pending PIC request */ 43 #define VM86_TRAP 6 /* return due to DOS-debugger request */ 44 45 /* 46 * function codes when invoking new vm86() 47 */ 48 #define VM86_PLUS_INSTALL_CHECK 0 49 #define VM86_ENTER 1 50 #define VM86_ENTER_NO_BYPASS 2 51 #define VM86_REQUEST_IRQ 3 52 #define VM86_FREE_IRQ 4 53 #define VM86_GET_IRQ_BITS 5 54 #define VM86_GET_AND_RESET_IRQ 6 55 56 /* 57 * This is the stack-layout seen by the user space program when we have 58 * done a translation of "SAVE_ALL" from vm86 mode. The real kernel layout 59 * is 'kernel_vm86_regs' (see below). 60 */ 61 62 struct vm86_regs { 63 /* 64 * normal regs, with special meaning for the segment descriptors.. 65 */ 66 long ebx; 67 long ecx; 68 long edx; 69 long esi; 70 long edi; 71 long ebp; 72 long eax; 73 long __null_ds; 74 long __null_es; 75 long __null_fs; 76 long __null_gs; 77 long orig_eax; 78 long eip; 79 unsigned short cs, __csh; 80 long eflags; 81 long esp; 82 unsigned short ss, __ssh; 83 /* 84 * these are specific to v86 mode: 85 */ 86 unsigned short es, __esh; 87 unsigned short ds, __dsh; 88 unsigned short fs, __fsh; 89 unsigned short gs, __gsh; 90 }; 91 92 struct revectored_struct { 93 unsigned long __map[8]; /* 256 bits */ 94 }; 95 96 struct vm86_struct { 97 struct vm86_regs regs; 98 unsigned long flags; 99 unsigned long screen_bitmap; 100 unsigned long cpu_type; 101 struct revectored_struct int_revectored; 102 struct revectored_struct int21_revectored; 103 }; 104 105 /* 106 * flags masks 107 */ 108 #define VM86_SCREEN_BITMAP 0x0001 109 110 struct vm86plus_info_struct { 111 unsigned long force_return_for_pic:1; 112 unsigned long vm86dbg_active:1; /* for debugger */ 113 unsigned long vm86dbg_TFpendig:1; /* for debugger */ 114 unsigned long unused:28; 115 unsigned long is_vm86pus:1; /* for vm86 internal use */ 116 unsigned char vm86dbg_intxxtab[32]; /* for debugger */ 117 }; 118 struct vm86plus_struct { 119 struct vm86_regs regs; 120 unsigned long flags; 121 unsigned long screen_bitmap; 122 unsigned long cpu_type; 123 struct revectored_struct int_revectored; 124 struct revectored_struct int21_revectored; 125 struct vm86plus_info_struct vm86plus; 126 }; 127 128 129 #endif /* _UAPI_ASM_X86_VM86_H */ 130