arch/i386-pc/kernel/kernel_cpu.h

   1 /*
   2     Copyright © 1995-2018, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: CPU-specific definitions.
   6 */
   7
   8 #ifndef KERNEL_CPU_H_
   9 #define KERNEL_CPU_H_
  10
  11 #include <aros/i386/cpucontext.h>
  12
  13 #include "segments.h"
  14
  15 /* We use native context format, no conversion needed */
  16 #define regs_t struct ExceptionContext
  17 /* There are no private add-ons */
  18 #define AROSCPUContext ExceptionContext
  19
  20 /* We have no VBlank emulation */
  21 #define NO_VBLANK_EMU
  22
  23 /* User/supervisor mode switching - not used */
  24 #define cpumode_t __unused char
  25
  26 #define goSuper() 0
  27 #define goUser()
  28 #define goBack(mode)
  29
  30 /* A command to issue a syscall */
  31 #define krnSysCall(num) asm volatile("int $0xfe"::"a"(num):"memory")
  32
  33 #define IN_USER_MODE \
  34         ({  short __value; \
  35         __asm__ __volatile__ ("mov %%cs,%%ax":"=a"(__value)); \
  36         (__value & 0x03);       })
  37
  38 #define PRINT_CPUCONTEXT(regs)                                                                          \
  39 {                                                                                                       \
  40     bug("[Kernel] Flags=0x%08X\n", regs->Flags);                                                        \
  41     bug("[Kernel] stack=%04x:%08x eflags=%08x eip=%04x:%08x ds=0x%04X\n",                               \
  42                  regs->ss, regs->esp, regs->eflags, regs->cs, regs->eip, regs->ds);                     \
  43     bug("[Kernel] eax=%08x ebx=%08x ecx=%08x edx=%08x\n", regs->eax, regs->ebx, regs->ecx, regs->edx);  \
  44     bug("[Kernel] esi=%08x edi=%08x ebp=%08x esp=%08x\n", regs->esi, regs->edi, regs->ebp, regs->esp);  \
  45 }
  46
  47 #define SP(regs) regs->esp
  48
  49 #endif