/* 
 * Copyright 2010 Stefan Lankes, Chair for Operating Systems,
 *                               RWTH Aachen University
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * This file is part of MetalSVM.
 */

/**
 * @author Stefan Lankes
 * @file arch/x86/include/asm/stddef.h
 * @brief Standard datatypes
 *
 * This file contains typedefs for standard datatypes for numerical and character values.
 */

#ifndef __ARCH_STDDEF_H__
#define __ARCH_STDDEF_H__

#ifdef __cplusplus
extern "C" {
#endif

/// A popular type for addresses
typedef unsigned long size_t;
/// Pointer differences
typedef long ptrdiff_t;
#ifdef __KERNEL__
typedef long ssize_t;
typedef long off_t;
#endif

/// Unsigned 64 bit integer
typedef unsigned long long uint64_t;
/// Signed 64 bit integer
typedef long long int64_t;
/// Unsigned 32 bit integer
typedef unsigned int uint32_t;
/// Signed 32 bit integer
typedef int int32_t;
/// Unsigned 16 bit integer
typedef unsigned short uint16_t;
/// Signed 16 bit integer
typedef short int16_t;
/// Unsigned 8 bit integer (/char)
typedef unsigned char uint8_t;
/// Signed 8 bit integer (/char)
typedef char int8_t;
/// 16 bit wide char type
typedef unsigned short wchar_t;

#ifndef _WINT_T
#define _WINT_T
typedef unsigned int wint_t;
#endif

/** @brief This defines what the stack looks like after an ISR was called.
 *
 * All the interrupt handler routines use this type for their only parameter.
 */
struct state {
	/* 
	 * We switched from software- to hardwaree-based multitasking
	 * Therefore, we do not longer save the registers by hand.
         */
	/*unsigned int gs, fs, es, ds; */				/* pushed the segs last */
	/*
	 * Commented this out to write it out in a longer form for HTML-documentation
	 */
  //unsigned int edi, esi, ebp, esp, ebx, edx, ecx, eax;		/* pushed by 'pusha' */
	//unsigned int int_no, err_code;					/* our 'push byte #' and ecodes do this */
	/// EDI register
	unsigned int edi;
	/// ESI register
	unsigned int esi;
	/// EBP register
	unsigned int ebp;
	/// ESP register
	unsigned int esp;
	/// EBX register 
	unsigned int ebx;
	/// EDX register
	unsigned int edx;
	/// ECX register
	unsigned int ecx;
	/// EAX register
	unsigned int eax;		/* pushed by 'pusha' */

	/// Interrupt number
	unsigned int int_no;
	/// Error code
	unsigned int err_code;					/* our 'push byte #' and ecodes do this */
	/*unsigned int eip, cs, eflags, useresp, ss;*/			/* pushed by the processor automatically */
};

/** @brief Read out APIC CPU ID
 * @return The APIC CPU ID
 */
uint32_t apic_cpu_id(void);

/// Convenience-define constant
#define LOGICAL_CPUID	apic_cpu_id()

#ifdef __cplusplus
}
#endif

#endif