Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef _ASM_X86_VM86_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define _ASM_X86_VM86_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <asm/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <uapi/asm/vm86.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * This is the (kernel) stack-layout when we have done a "SAVE_ALL" from vm86
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * mode - the main change is that the old segment descriptors aren't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  * useful any more and are forced to be zero by the kernel (and the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  * hardware when a trap occurs), and the real segment descriptors are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  * at the end of the structure. Look at ptrace.h to see the "normal"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * setup. For user space layout see 'struct vm86_regs' above.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct kernel_vm86_regs {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  * normal regs, with special meaning for the segment descriptors..
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	struct pt_regs pt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)  * these are specific to v86 mode:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	unsigned short es, __esh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	unsigned short ds, __dsh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	unsigned short fs, __fsh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	unsigned short gs, __gsh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct vm86 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	struct vm86plus_struct __user *user_vm86;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	struct pt_regs regs32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	unsigned long veflags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	unsigned long veflags_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	unsigned long saved_sp0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	unsigned long screen_bitmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	unsigned long cpu_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	struct revectored_struct int_revectored;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	struct revectored_struct int21_revectored;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	struct vm86plus_info_struct vm86plus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #ifdef CONFIG_VM86
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) void handle_vm86_fault(struct kernel_vm86_regs *, long);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) int handle_vm86_trap(struct kernel_vm86_regs *, long, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) void save_v86_state(struct kernel_vm86_regs *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct task_struct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define free_vm86(t) do {				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	struct thread_struct *__t = (t);		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	if (__t->vm86 != NULL) {			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 		kfree(__t->vm86);			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		__t->vm86 = NULL;			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	}						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)  * Support for VM86 programs to request interrupts for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)  * real mode hardware drivers:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define FIRST_VM86_IRQ		 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define LAST_VM86_IRQ		15
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static inline int invalid_vm86_irq(int irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	return irq < FIRST_VM86_IRQ || irq > LAST_VM86_IRQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) void release_vm86_irqs(struct task_struct *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #define handle_vm86_fault(a, b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) #define release_vm86_irqs(a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static inline int handle_vm86_trap(struct kernel_vm86_regs *a, long b, int c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static inline void save_v86_state(struct kernel_vm86_regs *a, int b) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #define free_vm86(t) do { } while(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #endif /* CONFIG_VM86 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #endif /* _ASM_X86_VM86_H */