/*
* Copyright (c) 2007 Pavel Jancik, Michal Kebrt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup arm32
* @{
*/
/** @file
*/
#ifndef KERN_arm32_TYPES_H_
#define KERN_arm32_TYPES_H_
#define NULL 0
#define false 0
#define true 1
typedef signed char int8_t;
typedef signed short int16_t;
typedef signed long int32_t;
typedef signed long long int64_t;
typedef unsigned char uint8_t;
typedef unsigned short uint16_t;
typedef unsigned long uint32_t;
typedef unsigned long long uint64_t;
typedef uint32_t size_t;
typedef uint32_t count_t;
typedef uint32_t index_t;
typedef uint32_t uintptr_t;
typedef uint32_t pfn_t;
typedef uint32_t ipl_t;
typedef uint32_t unative_t;
typedef int32_t native_t;
typedef uint8_t bool;
typedef uint64_t task_id_t;
typedef uint32_t context_id_t;
typedef int32_t inr_t;
typedef int32_t devno_t;
typedef uint32_t __address;
/** Page table entry.
*
* We have different structs for level 0 and level 1 page table entries.
* */
typedef struct {
unsigned dummy : 32;
} pte_t;
/** Level 0 page table entry. */
typedef struct {
/* 01b for coarse tables, see below for details */
unsigned descriptor_type : 2;
unsigned impl_specific : 3;
unsigned domain : 4;
unsigned should_be_zero : 1;
/* Pointer to the coarse 2nd level page table (holding entries for small (4KB)
* or large (64KB) pages. ARM also supports fine 2nd level page tables that
* may hold even tiny pages (1KB) but they are bigger (4KB per table in comparison
* with 1KB per the coarse table)
*/
unsigned coarse_table_addr : 22;
} __attribute__ ((packed)) pte_level0_t;
/** Level 1 page table entry (small (4KB) pages used) */
typedef struct {
/* 0b10 for small pages */
unsigned descriptor_type : 2;
unsigned bufferable : 1;
unsigned cacheable : 1;
/* access permissions for each of 4 subparts of a page
* (for each 1KB when small pages used */
unsigned access_permission_0 : 2;
unsigned access_permission_1 : 2;
unsigned access_permission_2 : 2;
unsigned access_permission_3 : 2;
unsigned frame_base_addr : 20;
} __attribute__ ((packed)) pte_level1_t;
/* Level 1 page tables access permissions */
/** User mode: no access, privileged mode: no access */
#define pte_ap_user_no_kernel_no 0
/** User mode: no access, privileged mode: read/write */
#define pte_ap_user_no_kernel_rw 1
/** User mode: read only, privileged mode: read/write */
#define pte_ap_user_ro_kernel_rw 2
/// User mode: read/write, privileged mode: read/write
#define pte_ap_user_rw_kernel_rw 3
/* pte_level0_t and pte_level1_t descriptor_type flags */
/** pte_level0_t and pte_level1_t "not present" flag (used in descriptor_type) */
#define pte_descriptor_not_preset 0
/** pte_level0_t coarse page table flag (used in descriptor_type) */
#define pte_descriptor_coarse_table 1
/** pte_level1_t small page table flag (used in descriptor type) */
#define pte_descriptor_small_page 2
#endif
/** @}
*/