#ifndef KERNAUX_INCLUDED_ARCH_I386 #define KERNAUX_INCLUDED_ARCH_I386 #ifdef __cplusplus extern "C" { #endif #include #include #define KERNAUX_ARCH_I386_PAGE_SIZE (1024 * 4) // 4 KiB #define KERNAUX_ARCH_I386_PAGE_BIG_SIZE (1024 * 1024 * 4) // 4 MiB #define KERNAUX_ARCH_I386_PAGE_DIR_ENTRIES_COUNT 1024 #define KERNAUX_ARCH_I386_PAGE_TABLE_ENTRIES_COUNT 1024 #define KERNAUX_ARCH_I386_PAGES_COUNT_MAX (1024 * 1024) #define KERNAUX_ARCH_I386_ADDR_TO_PDE_INDEX(addr) \ ((((uint32_t)addr) & 0xffffffff) >> 22) #define KERNAUX_ARCH_I386_ADDR_TO_PTE_INDEX(addr) \ (((((uint32_t)addr) & 0xffffffff) >> 12) & 0x3ff) #define KERNAUX_ARCH_I386_ADDR_TO_PDE_ADDR(addr) \ ((((uint32_t)addr) & 0xffffffff) >> 12) #define KERNAUX_ARCH_I386_ADDR_TO_PTE_ADDR(addr) \ KERNAUX_ARCH_I386_ADDR_TO_PDE_ADDR(addr) // CR0 bits #define KERNAUX_ARCH_I386_CR0_PE KERNAUX_BITS32(0) // 0: Protected Mode Enable #define KERNAUX_ARCH_I386_CR0_MP KERNAUX_BITS32(1) // 1: Monitor co-processor #define KERNAUX_ARCH_I386_CR0_EM KERNAUX_BITS32(2) // 2: x87 FPU Emulation #define KERNAUX_ARCH_I386_CR0_TS KERNAUX_BITS32(3) // 3: Task switched #define KERNAUX_ARCH_I386_CR0_ET KERNAUX_BITS32(4) // 4: Extension type #define KERNAUX_ARCH_I386_CR0_NE KERNAUX_BITS32(5) // 5: Numeric error #define KERNAUX_ARCH_I386_CR0_WP KERNAUX_BITS32(16) // 16: Write protect #define KERNAUX_ARCH_I386_CR0_AM KERNAUX_BITS32(18) // 18: Alignment mask #define KERNAUX_ARCH_I386_CR0_NW KERNAUX_BITS32(29) // 29: Not-write trough #define KERNAUX_ARCH_I386_CR0_CD KERNAUX_BITS32(30) // 30: Cache disable #define KERNAUX_ARCH_I386_CR0_PG KERNAUX_BITS32(31) // 31: Paging // Some CR4 bits #define KERNAUX_ARCH_I386_CR4_VME KERNAUX_BITS32(0) // 0: Virtual 8086 Mode Extensions #define KERNAUX_ARCH_I386_CR4_PVI KERNAUX_BITS32(1) // 1: Protected-mode Virtual Interrupts #define KERNAUX_ARCH_I386_CR4_TSD KERNAUX_BITS32(2) // 2: Time Stamp Disable #define KERNAUX_ARCH_I386_CR4_DE KERNAUX_BITS32(3) // 3: Debugging Extensions #define KERNAUX_ARCH_I386_CR4_PSE KERNAUX_BITS32(4) // 4: Page Size Extension #define KERNAUX_ARCH_I386_CR4_PAE KERNAUX_BITS32(5) // 5: Physical Address Extension #define KERNAUX_ARCH_I386_CR4_MCE KERNAUX_BITS32(6) // 6: Machine Check Exception #define KERNAUX_ARCH_I386_CR4_PGE KERNAUX_BITS32(7) // 7: Page Global Enabled // TODO: bits 8-31 #include // Global or local descriptor table entry // TODO: validate this according to spec struct KernAux_Arch_I386_DTE { unsigned limit_low : 16; unsigned base_low : 24; unsigned accessed : 1; unsigned read_write : 1; unsigned conforming_expand_down : 1; unsigned code : 1; unsigned always_1 : 1; unsigned DPL : 2; unsigned present : 1; unsigned limit_high : 4; unsigned available : 1; unsigned always_0 : 1; unsigned big : 1; unsigned gran : 1; unsigned base_high : 8; } KERNAUX_PACKING_ATTR; KERNAUX_STATIC_TEST_STRUCT_SIZE(KernAux_Arch_I386_DTE, 8); /** * @brief Task state segment * @see The manual, page 132, figure 7-1 */ struct KernAux_Arch_I386_TSS { // 0x00 uint16_t prev_tss; uint16_t _zero0; // 0x04 uint32_t esp0; uint16_t ss0; uint16_t _zero1; uint32_t esp1; uint16_t ss1; uint16_t _zero2; uint32_t esp2; uint16_t ss2; uint16_t _zero3; // 0x1c uint32_t cr3; uint32_t eip; uint32_t eflags; uint32_t eax; uint32_t ecx; uint32_t edx; uint32_t ebx; uint32_t esp; uint32_t ebp; uint32_t esi; uint32_t edi; // 0x48 uint16_t es; uint16_t _zero4; uint16_t cs; uint16_t _zero5; uint16_t ss; uint16_t _zero6; uint16_t ds; uint16_t _zero7; uint16_t fs; uint16_t _zero8; uint16_t gs; uint16_t _zero9; uint16_t ldt; uint16_t _zero10; // 0x64 uint16_t _zero11; uint16_t io_map_base; } KERNAUX_PACKING_ATTR; KERNAUX_STATIC_TEST_STRUCT_SIZE(KernAux_Arch_I386_TSS, 104); // Page directory entry // TODO: validate this according to spec struct KernAux_Arch_I386_PDE { unsigned present : 1; unsigned writable : 1; unsigned user : 1; unsigned write_through : 1; unsigned cache_disabled : 1; unsigned accessed : 1; unsigned available0 : 1; unsigned page_size : 1; unsigned available1 : 4; unsigned addr : 20; } KERNAUX_PACKING_ATTR; KERNAUX_STATIC_TEST_STRUCT_SIZE(KernAux_Arch_I386_PDE, 4); // Page table entry // TODO: validate this according to spec struct KernAux_Arch_I386_PTE { unsigned present : 1; unsigned writable : 1; unsigned user : 1; unsigned write_through : 1; unsigned cache_disabled : 1; unsigned accessed : 1; unsigned dirty : 1; unsigned attr_table : 1; unsigned global : 1; unsigned available : 3; unsigned addr : 20; } KERNAUX_PACKING_ATTR; KERNAUX_STATIC_TEST_STRUCT_SIZE(KernAux_Arch_I386_PDE, 4); // Page directory struct KernAux_Arch_I386_PageDir { struct KernAux_Arch_I386_PDE pdes[KERNAUX_ARCH_I386_PAGE_DIR_ENTRIES_COUNT]; } KERNAUX_PACKING_ATTR; KERNAUX_STATIC_TEST_STRUCT_SIZE(KernAux_Arch_I386_PageDir, KERNAUX_ARCH_I386_PAGE_SIZE); // Page table struct KernAux_Arch_I386_PageTable { struct KernAux_Arch_I386_PTE ptes[KERNAUX_ARCH_I386_PAGE_TABLE_ENTRIES_COUNT]; } KERNAUX_PACKING_ATTR; KERNAUX_STATIC_TEST_STRUCT_SIZE(KernAux_Arch_I386_PageTable, KERNAUX_ARCH_I386_PAGE_SIZE); #include #ifdef __cplusplus } #endif #endif