| #ifndef _ASM_X86_VM86_H |
| #define _ASM_X86_VM86_H |
| |
| /* |
| * I'm guessing at the VIF/VIP flag usage, but hope that this is how |
| * the Pentium uses them. Linux will return from vm86 mode when both |
| * VIF and VIP is set. |
| * |
| * On a Pentium, we could probably optimize the virtual flags directly |
| * in the eflags register instead of doing it "by hand" in vflags... |
| * |
| * Linus |
| */ |
| |
| #include <asm/processor-flags.h> |
| |
| #define BIOSSEG 0x0f000 |
| |
| #define CPU_086 0 |
| #define CPU_186 1 |
| #define CPU_286 2 |
| #define CPU_386 3 |
| #define CPU_486 4 |
| #define CPU_586 5 |
| |
| /* |
| * Return values for the 'vm86()' system call |
| */ |
| #define VM86_TYPE(retval) ((retval) & 0xff) |
| #define VM86_ARG(retval) ((retval) >> 8) |
| |
| #define VM86_SIGNAL 0 /* return due to signal */ |
| #define VM86_UNKNOWN 1 /* unhandled GP fault |
| - IO-instruction or similar */ |
| #define VM86_INTx 2 /* int3/int x instruction (ARG = x) */ |
| #define VM86_STI 3 /* sti/popf/iret instruction enabled |
| virtual interrupts */ |
| |
| /* |
| * Additional return values when invoking new vm86() |
| */ |
| #define VM86_PICRETURN 4 /* return due to pending PIC request */ |
| #define VM86_TRAP 6 /* return due to DOS-debugger request */ |
| |
| /* |
| * function codes when invoking new vm86() |
| */ |
| #define VM86_PLUS_INSTALL_CHECK 0 |
| #define VM86_ENTER 1 |
| #define VM86_ENTER_NO_BYPASS 2 |
| #define VM86_REQUEST_IRQ 3 |
| #define VM86_FREE_IRQ 4 |
| #define VM86_GET_IRQ_BITS 5 |
| #define VM86_GET_AND_RESET_IRQ 6 |
| |
| /* |
| * This is the stack-layout seen by the user space program when we have |
| * done a translation of "SAVE_ALL" from vm86 mode. The real kernel layout |
| * is 'kernel_vm86_regs' (see below). |
| */ |
| |
| struct vm86_regs { |
| /* |
| * normal regs, with special meaning for the segment descriptors.. |
| */ |
| long ebx; |
| long ecx; |
| long edx; |
| long esi; |
| long edi; |
| long ebp; |
| long eax; |
| long __null_ds; |
| long __null_es; |
| long __null_fs; |
| long __null_gs; |
| long orig_eax; |
| long eip; |
| unsigned short cs, __csh; |
| long eflags; |
| long esp; |
| unsigned short ss, __ssh; |
| /* |
| * these are specific to v86 mode: |
| */ |
| unsigned short es, __esh; |
| unsigned short ds, __dsh; |
| unsigned short fs, __fsh; |
| unsigned short gs, __gsh; |
| }; |
| |
| struct revectored_struct { |
| unsigned long __map[8]; /* 256 bits */ |
| }; |
| |
| struct vm86_struct { |
| struct vm86_regs regs; |
| unsigned long flags; |
| unsigned long screen_bitmap; |
| unsigned long cpu_type; |
| struct revectored_struct int_revectored; |
| struct revectored_struct int21_revectored; |
| }; |
| |
| /* |
| * flags masks |
| */ |
| #define VM86_SCREEN_BITMAP 0x0001 |
| |
| struct vm86plus_info_struct { |
| unsigned long force_return_for_pic:1; |
| unsigned long vm86dbg_active:1; /* for debugger */ |
| unsigned long vm86dbg_TFpendig:1; /* for debugger */ |
| unsigned long unused:28; |
| unsigned long is_vm86pus:1; /* for vm86 internal use */ |
| unsigned char vm86dbg_intxxtab[32]; /* for debugger */ |
| }; |
| struct vm86plus_struct { |
| struct vm86_regs regs; |
| unsigned long flags; |
| unsigned long screen_bitmap; |
| unsigned long cpu_type; |
| struct revectored_struct int_revectored; |
| struct revectored_struct int21_revectored; |
| struct vm86plus_info_struct vm86plus; |
| }; |
| |
| |
| #endif /* _ASM_X86_VM86_H */ |