1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun #ifndef _UAPI_ASM_X86_VM86_H 3*4882a593Smuzhiyun #define _UAPI_ASM_X86_VM86_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun /* 6*4882a593Smuzhiyun * I'm guessing at the VIF/VIP flag usage, but hope that this is how 7*4882a593Smuzhiyun * the Pentium uses them. Linux will return from vm86 mode when both 8*4882a593Smuzhiyun * VIF and VIP is set. 9*4882a593Smuzhiyun * 10*4882a593Smuzhiyun * On a Pentium, we could probably optimize the virtual flags directly 11*4882a593Smuzhiyun * in the eflags register instead of doing it "by hand" in vflags... 12*4882a593Smuzhiyun * 13*4882a593Smuzhiyun * Linus 14*4882a593Smuzhiyun */ 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun #include <asm/processor-flags.h> 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun #define BIOSSEG 0x0f000 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun #define CPU_086 0 21*4882a593Smuzhiyun #define CPU_186 1 22*4882a593Smuzhiyun #define CPU_286 2 23*4882a593Smuzhiyun #define CPU_386 3 24*4882a593Smuzhiyun #define CPU_486 4 25*4882a593Smuzhiyun #define CPU_586 5 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun /* 28*4882a593Smuzhiyun * Return values for the 'vm86()' system call 29*4882a593Smuzhiyun */ 30*4882a593Smuzhiyun #define VM86_TYPE(retval) ((retval) & 0xff) 31*4882a593Smuzhiyun #define VM86_ARG(retval) ((retval) >> 8) 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun #define VM86_SIGNAL 0 /* return due to signal */ 34*4882a593Smuzhiyun #define VM86_UNKNOWN 1 /* unhandled GP fault 35*4882a593Smuzhiyun - IO-instruction or similar */ 36*4882a593Smuzhiyun #define VM86_INTx 2 /* int3/int x instruction (ARG = x) */ 37*4882a593Smuzhiyun #define VM86_STI 3 /* sti/popf/iret instruction enabled 38*4882a593Smuzhiyun virtual interrupts */ 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun /* 41*4882a593Smuzhiyun * Additional return values when invoking new vm86() 42*4882a593Smuzhiyun */ 43*4882a593Smuzhiyun #define VM86_PICRETURN 4 /* return due to pending PIC request */ 44*4882a593Smuzhiyun #define VM86_TRAP 6 /* return due to DOS-debugger request */ 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun /* 47*4882a593Smuzhiyun * function codes when invoking new vm86() 48*4882a593Smuzhiyun */ 49*4882a593Smuzhiyun #define VM86_PLUS_INSTALL_CHECK 0 50*4882a593Smuzhiyun #define VM86_ENTER 1 51*4882a593Smuzhiyun #define VM86_ENTER_NO_BYPASS 2 52*4882a593Smuzhiyun #define VM86_REQUEST_IRQ 3 53*4882a593Smuzhiyun #define VM86_FREE_IRQ 4 54*4882a593Smuzhiyun #define VM86_GET_IRQ_BITS 5 55*4882a593Smuzhiyun #define VM86_GET_AND_RESET_IRQ 6 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun /* 58*4882a593Smuzhiyun * This is the stack-layout seen by the user space program when we have 59*4882a593Smuzhiyun * done a translation of "SAVE_ALL" from vm86 mode. The real kernel layout 60*4882a593Smuzhiyun * is 'kernel_vm86_regs' (see below). 61*4882a593Smuzhiyun */ 62*4882a593Smuzhiyun 63*4882a593Smuzhiyun struct vm86_regs { 64*4882a593Smuzhiyun /* 65*4882a593Smuzhiyun * normal regs, with special meaning for the segment descriptors.. 66*4882a593Smuzhiyun */ 67*4882a593Smuzhiyun long ebx; 68*4882a593Smuzhiyun long ecx; 69*4882a593Smuzhiyun long edx; 70*4882a593Smuzhiyun long esi; 71*4882a593Smuzhiyun long edi; 72*4882a593Smuzhiyun long ebp; 73*4882a593Smuzhiyun long eax; 74*4882a593Smuzhiyun long __null_ds; 75*4882a593Smuzhiyun long __null_es; 76*4882a593Smuzhiyun long __null_fs; 77*4882a593Smuzhiyun long __null_gs; 78*4882a593Smuzhiyun long orig_eax; 79*4882a593Smuzhiyun long eip; 80*4882a593Smuzhiyun unsigned short cs, __csh; 81*4882a593Smuzhiyun long eflags; 82*4882a593Smuzhiyun long esp; 83*4882a593Smuzhiyun unsigned short ss, __ssh; 84*4882a593Smuzhiyun /* 85*4882a593Smuzhiyun * these are specific to v86 mode: 86*4882a593Smuzhiyun */ 87*4882a593Smuzhiyun unsigned short es, __esh; 88*4882a593Smuzhiyun unsigned short ds, __dsh; 89*4882a593Smuzhiyun unsigned short fs, __fsh; 90*4882a593Smuzhiyun unsigned short gs, __gsh; 91*4882a593Smuzhiyun }; 92*4882a593Smuzhiyun 93*4882a593Smuzhiyun struct revectored_struct { 94*4882a593Smuzhiyun unsigned long __map[8]; /* 256 bits */ 95*4882a593Smuzhiyun }; 96*4882a593Smuzhiyun 97*4882a593Smuzhiyun struct vm86_struct { 98*4882a593Smuzhiyun struct vm86_regs regs; 99*4882a593Smuzhiyun unsigned long flags; 100*4882a593Smuzhiyun unsigned long screen_bitmap; 101*4882a593Smuzhiyun unsigned long cpu_type; 102*4882a593Smuzhiyun struct revectored_struct int_revectored; 103*4882a593Smuzhiyun struct revectored_struct int21_revectored; 104*4882a593Smuzhiyun }; 105*4882a593Smuzhiyun 106*4882a593Smuzhiyun /* 107*4882a593Smuzhiyun * flags masks 108*4882a593Smuzhiyun */ 109*4882a593Smuzhiyun #define VM86_SCREEN_BITMAP 0x0001 110*4882a593Smuzhiyun 111*4882a593Smuzhiyun struct vm86plus_info_struct { 112*4882a593Smuzhiyun unsigned long force_return_for_pic:1; 113*4882a593Smuzhiyun unsigned long vm86dbg_active:1; /* for debugger */ 114*4882a593Smuzhiyun unsigned long vm86dbg_TFpendig:1; /* for debugger */ 115*4882a593Smuzhiyun unsigned long unused:28; 116*4882a593Smuzhiyun unsigned long is_vm86pus:1; /* for vm86 internal use */ 117*4882a593Smuzhiyun unsigned char vm86dbg_intxxtab[32]; /* for debugger */ 118*4882a593Smuzhiyun }; 119*4882a593Smuzhiyun struct vm86plus_struct { 120*4882a593Smuzhiyun struct vm86_regs regs; 121*4882a593Smuzhiyun unsigned long flags; 122*4882a593Smuzhiyun unsigned long screen_bitmap; 123*4882a593Smuzhiyun unsigned long cpu_type; 124*4882a593Smuzhiyun struct revectored_struct int_revectored; 125*4882a593Smuzhiyun struct revectored_struct int21_revectored; 126*4882a593Smuzhiyun struct vm86plus_info_struct vm86plus; 127*4882a593Smuzhiyun }; 128*4882a593Smuzhiyun 129*4882a593Smuzhiyun 130*4882a593Smuzhiyun #endif /* _UAPI_ASM_X86_VM86_H */ 131