src/device/oprom/realmode/x86.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #ifndef __DEVICE_OPROM_REALMODE_X86_H__
   4 #define __DEVICE_OPROM_REALMODE_X86_H__
   5
   6 #include <cpu/cpu.h>
   7 #include <stdint.h>
   8
   9 #define REALMODE_BASE ((void *)0x600)
  10
  11 struct realmode_idt {
  12         u16 offset, cs;
  13 };
  14
  15 void x86_exception(struct eregs *info);
  16
  17 /* From x86_asm.S */
  18 extern unsigned char __idt_handler;
  19 extern unsigned int __idt_handler_size;
  20 extern unsigned char __realmode_code;
  21 extern unsigned int __realmode_code_size;
  22
  23 extern unsigned int (*realmode_call)(u32 addr, u32 eax, u32 ebx, u32 ecx,
  24                 u32 edx, u32 esi, u32 edi) asmlinkage;
  25
  26 extern unsigned int (*realmode_interrupt)(u32 intno, u32 eax, u32 ebx, u32 ecx,
  27                 u32 edx, u32 esi, u32 edi) asmlinkage;
  28
  29 #define FAKE_MEMORY_SIZE (1024*1024) // only 1MB
  30 #define INITIAL_EBDA_SEGMENT 0xF600
  31 #define INITIAL_EBDA_SIZE 0x400
  32
  33 int int10_handler(void);
  34 int int12_handler(void);
  35 int int16_handler(void);
  36 int int1a_handler(void);
  37
  38 #endif /* __DEVICE_OPROM_REALMODE_X86_H__ */