| 30,17 → 30,14 |
|---|
| * @{ |
| */ |
| /** @file |
| * @brief Type definitions. |
| */ |
| |
| #ifndef KERN_arm32_TYPES_H_ |
| #define KERN_arm32_TYPES_H_ |
| |
| #ifndef DOXYGEN |
| # define ATTRIBUTE_PACKED __attribute__ ((packed)) |
| #else |
| # define ATTRIBUTE_PACKED |
| #endif |
| #define NULL 0 |
| #define false 0 |
| #define true 1 |
| |
| typedef signed char int8_t; |
| typedef signed short int16_t; |
| 53,6 → 50,8 |
|---|
| 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; |
| 62,39 → 61,77 |
|---|
| typedef uint32_t unative_t; |
| typedef int32_t native_t; |
| |
| typedef struct { |
| } fncptr_t; |
| typedef uint8_t bool; |
| typedef uint64_t task_id_t; |
| typedef uint32_t context_id_t; |
| |
| #define PRIp "x" /**< Format for uintptr_t. */ |
| #define PRIs "u" /**< Format for size_t. */ |
| typedef int32_t inr_t; |
| typedef int32_t devno_t; |
| |
| #define PRId8 "d" /**< Format for int8_t. */ |
| #define PRId16 "d" /**< Format for int16_t. */ |
| #define PRId32 "d" /**< Format for int32_t. */ |
| #define PRId64 "lld" /**< Format for int64_t. */ |
| #define PRIdn "d" /**< Format for native_t. */ |
| typedef uint32_t __address; |
| |
| #define PRIu8 "u" /**< Format for uint8_t. */ |
| #define PRIu16 "u" /**< Format for uint16_t. */ |
| #define PRIu32 "u" /**< Format for uint32_t. */ |
| #define PRIu64 "llu" /**< Format for uint64_t. */ |
| #define PRIun "u" /**< Format for unative_t. */ |
| |
| #define PRIx8 "x" /**< Format for hexadecimal (u)int8_t. */ |
| #define PRIx16 "x" /**< Format for hexadecimal (u)int16_t. */ |
| #define PRIx32 "x" /**< Format for hexadecimal (u)uint32_t. */ |
| #define PRIx64 "llx" /**< Format for hexadecimal (u)int64_t. */ |
| #define PRIxn "x" /**< Format for hexadecimal (u)native_t. */ |
| |
| /** Page table entry. |
| * |
| * |
| * We have different structs for level 0 and level 1 page table entries. |
| * See page.h for definition of pte_level*_t. |
| */ |
| * */ |
| typedef struct { |
| unsigned dummy : 32; |
| 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 |
| |
| /** @} |