arch/i386-pc/kernel/kernel_cpu.h

   1 /*
   2  * CPU-specific definitions.
   3  *
   4  * Architectures with the same CPU will likely share single kernel_cpu.h
   5  * in arch/$(CPU)-all/kernel/kernel_cpu.h
   6  *
   7  * As you can see, this file is just a sample.
   8  */
   9
  10 #ifndef KERNEL_CPU_H_
  11 #define KERNEL_CPU_H_
  12
  13 #include <aros/i386/cpucontext.h>
  14
  15 #include "segments.h"
  16
  17 /*
  18  * We handle all 255 exception vectors. However vectors starting from 0x20
  19  * are hardware IRQs which are handled separately. So - 32 raw exceptions.
  20  */
  21 #define EXCEPTIONS_COUNT 32
  22
  23 /* We use native context format, no conversion needed */
  24 #define regs_t struct ExceptionContext
  25 /* There are no private add-ons */
  26 #define AROSCPUContext ExceptionContext
  27
  28 /* We have no VBlank emulation */
  29 #define NO_VBLANK_EMU
  30
  31 /* User/supervisor mode switching - not used */
  32 #define cpumode_t __unused char
  33
  34 #define goSuper() 0
  35 #define goUser()
  36 #define goBack(mode)
  37
  38 /* A command to issue a syscall */
  39 #define krnSysCall(num) asm volatile("int $0x80"::"a"(num):"memory")
  40
  41 #define IN_USER_MODE \
  42         ({  short __value; \
  43         __asm__ __volatile__ ("mov %%cs,%%ax":"=a"(__value)); \
  44         (__value & 0x03);       })
  45
  46 #define PRINT_CPUCONTEXT(regs)                                                                          \
  47     bug("[Kernel] Flags=0x%08X\n", regs->Flags);                                                        \
  48     bug("[Kernel] stack=%04x:%08x rflags=%08x ip=%04x:%08x ds=0x%04X\n",                                \
  49                  regs->ss, regs->esp, regs->eflags, regs->cs, regs->eip, regs->ds);                     \
  50     bug("[Kernel] rax=%08x rbx=%08x rcx=%08x rdx=%08x\n", regs->eax, regs->ebx, regs->ecx, regs->edx);  \
  51     bug("[Kernel] rsi=%08x rdi=%08x rbp=%08x rsp=%08x\n", regs->esi, regs->edi, regs->ebp, regs->esp);
  52
  53 #define SP(regs) regs->esp
  54
  55 #endif