Mercurial > lcfOS
view cos/kernel/kernel.h @ 180:25a0753da4cf
Re-organized files
author | Windel Bouwman |
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date | Thu, 09 May 2013 17:35:19 +0200 |
parents | 35cc54e078dd |
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#ifndef KERNEL_H #define KERNEL_H // Include common functions, available to all! #define NULL ((void*)0) /* Types */ // Type defs: typedef unsigned char uint8_t; typedef unsigned short uint16_t; typedef unsigned int uint32_t; typedef unsigned long int uint64_t; typedef long int int64_t; _Static_assert(sizeof(uint8_t) == 1, "sizeof(uint8_t) != 1"); _Static_assert(sizeof(uint16_t) == 2, "sizeof(uint16_t) != 2"); _Static_assert(sizeof(uint32_t) == 4, "sizeof(uint32_t) != 4"); _Static_assert(sizeof(uint64_t) == 8, "sizeof(uint64_t) != 8"); _Static_assert(sizeof(int64_t) == 8, "sizeof(int64_t) != 8"); // IDT related structures: typedef struct { uint16_t baseLow; uint16_t selector; uint8_t reserved1; uint8_t flags; uint16_t baseMid; uint32_t baseHigh; uint32_t reserved2; } __attribute__((packed)) IDT_entry; typedef struct { uint16_t limit; uint64_t base; } __attribute__((packed)) idtPointer; // Multiboot structs: struct multiboot_aout_symbol_table { uint32_t tabsize; uint32_t strsize, addr, reserved; }; typedef struct multiboot_info_tag { uint32_t flags; // Multiboot flags / version uint32_t mem_lower; // available memory from BIOS uint32_t mem_upper; uint32_t boot_device; uint32_t cmdline; // COmmand line uint32_t mods_count; uint32_t mods_addr; union { struct multiboot_aout_symbol_table aout_sym; } u; uint32_t mmap_length; uint32_t mmap_addr; } multiboot_info_t; typedef struct memory_map_tag { uint32_t size; uint64_t base; uint64_t length; uint32_t type; } __attribute__((packed)) multiboot_memory_map_t; typedef struct { uint32_t mod_start; uint32_t mod_end; uint32_t cmdline; uint32_t pad; } multiboot_module_t; // Memory manager structures: typedef struct { uint64_t present : 1; uint64_t rw : 1; uint64_t us : 1; // user or supervisor uint64_t pwt : 1; // page level write-through uint64_t pcd : 1; // page cache disable uint64_t accessed : 1; uint64_t ignored : 1; uint64_t ps : 1; // must be 0. uint64_t ignored2 : 4; // 12 bits so far uint64_t address : 40; // address of page directory pointer table. uint64_t ignored3 : 11; uint64_t xd : 1; // execute disable } PML4E_t; // 64 bits wide, PML4 table must be 4096 byte aligned. typedef struct { // Must be 12 bits aligned! PML4E_t table[512]; uint64_t physicalAddress; // Physical address of the table above } PML4_t; typedef struct { uint64_t present : 1; uint64_t rw : 1; uint64_t us : 1; // user or supervisor uint64_t pwt : 1; // page level write-through uint64_t pcd : 1; // page cache disable uint64_t accessed : 1; uint64_t ignored : 1; uint64_t ps : 1; // page size, must be 0, otherwise maps a 1 GB page. uint64_t ignored2 : 4; // 12 bits so far uint64_t address : 40; // address of page directory table. uint64_t ignored3 : 11; uint64_t xd : 1; // execute disable } PDPTE_t; // Page directory pointer table entry, 64 bits wide. 4-kB aligned. // Page directory pointer table: typedef struct { PDPTE_t table[512]; uint64_t physicalAddress; } PDPT_t; typedef struct { uint64_t present : 1; uint64_t rw : 1; uint64_t us : 1; // user or supervisor uint64_t pwt : 1; uint64_t pcd : 1; // page cache disable uint64_t accessed : 1; uint64_t ignored : 1; uint64_t ps : 1; // page size, must be 0, otherwise maps a 2-MB page. uint64_t ignored2 : 4; // 12 bits so far uint64_t address : 40; // address of page table. uint64_t ignored3 : 11; uint64_t xd : 1; // execute disable } PDE_t; // Page directory: typedef struct { PDE_t table[512]; uint64_t physicalAddress; } PD_t; typedef struct { unsigned present : 1; uint64_t rw : 1; uint64_t us : 1; // user or supervisor uint64_t pwt : 1; uint64_t pcd : 1; // page cache disable uint64_t accessed : 1; uint64_t dirty : 1; uint64_t pat : 1; // memory type? uint64_t g : 1; // Global? uint64_t ignored : 3; uint64_t address : 40; uint64_t ignored2 : 11; uint64_t xd : 1; } page_t; _Static_assert(sizeof(page_t) == 8, "sizeof(page_t) != 8"); _Static_assert(sizeof(PDE_t) == 8, "sizeof(PDE_t) != 8"); _Static_assert(sizeof(PDPTE_t) == 8, "sizeof(PDPTE_t) != 8"); _Static_assert(sizeof(PML4E_t) == 8, "sizeof(PML4E_t) != 8"); // Page table: typedef struct { page_t table[512]; uint64_t physicalAddress; } PT_t; // Make memmap a PML4 type: typedef PML4_t memmap_t; // Malloc related functions typedef struct { uint64_t magic; uint64_t state; uint64_t size; } heap_header_t; typedef struct { heap_header_t *first_block; uint64_t start_address; uint64_t end_address; } heap_t; // Task related types: typedef struct { char name[32]; // Name of the console unsigned char screendata[80*25]; // All chars in the console! } console_t; typedef struct task_t { struct task_t* next; uint32_t kstack; uint32_t ustack; // For task switching: uint64_t cr3; uint64_t rip; uint64_t rsp; uint64_t rbp; uint32_t pid; uint32_t parent; uint32_t owner; uint32_t groups; uint32_t timetorun; uint32_t sleep; uint32_t priority; uint32_t filehandle; char naam[32]; console_t *console; } task_t; /* Filesystem related types: */ struct fs_node_tag; struct fs_dirent_tag; typedef uint64_t (*read_type_t)(struct fs_node_tag*, uint64_t, uint64_t, uint8_t*); typedef uint64_t (*write_type_t)(struct fs_node_tag*, uint64_t, uint64_t, uint8_t*); typedef void (*open_type_t)(struct fs_node_tag*); typedef void (*close_type_t)(struct fs_node_tag*); typedef struct fs_dirent_tag* (*readdir_type_t)(struct fs_node_tag*, int); typedef struct fs_node_tag { char name[129]; uint64_t flags; uint64_t length; uint64_t inode; // Accessor functions: read_type_t read; write_type_t write; open_type_t open; close_type_t close; readdir_type_t readdir; } fs_node_t; typedef struct fs_dirent_tag { char name[65]; uint64_t inode; } fs_dirent_t; #define FS_FILE 0x1 #define FS_DIRECTORY 0x2 uint64_t read_fs(fs_node_t *node, uint64_t offset, uint64_t size, uint8_t *buffer); uint64_t write_fs(fs_node_t *node, uint64_t offset, uint64_t size, uint8_t *buffer); void open_fs(fs_node_t *node); void close_fs(fs_node_t *node); fs_dirent_t* readdir_fs(fs_node_t *node, int i); // Initial ramdisk functions: fs_node_t* initialize_initrd(uint64_t location); void load_ramdisk(void); // Variable argument list things: #define va_start(v,l) __builtin_va_start(v,l) #define va_end(v) __builtin_va_end(v) #define va_arg(v,l) __builtin_va_arg(v,l) typedef __builtin_va_list va_list; /* Global variables */ extern uint64_t kernel_end; extern uint64_t placement_address; extern memmap_t* kernel_map; /* Procedures */ // memory functions: // TODO: remove some redundant API functions: void init_memory(uint64_t total_mem_size); page_t* get_page(uint64_t address, memmap_t*); void alloc_frame(page_t *page); void loadPageTable(void* tableAddress); void switch_mapping(memmap_t* mapping); void enablePaging(); // Malloc related: void* kmalloc(uint64_t size); void* kmalloc_a(uint64_t size); // Aligned on a 4 KiB page. void kfree(void* ptr); heap_t* create_heap(uint64_t location, uint64_t size); // task related functions: void initialize_tasking(); void new_task(); void task_scheduler(); // STDout funcs: void printf(const char* fmt, ... ); void memset(void* ptr, uint8_t value, uint64_t num); void memcpy(void* dst, void* src, uint64_t num); int strncmp(const char* s1, const char* s2, int size); // Screen related: void clear_screen(); void init_screen(); void print_string(const char *); void set_cursor(int newrow, int newcol); void get_cursor(int *therow, int *thecol); void set_color(int forecolor, int backcolor); // For IO ports: uint8_t inb(uint16_t); uint16_t inw(uint16_t); void outb(uint16_t, uint8_t); // Interrupt functions: void setupIDT(void); void PICremap(void); void loadIDT(void); // ASM helper: uint64_t read_rip(); // Helpers: void halt(void); void panic(char *msg); void reboot(void); void magicBochsBreak(); void doCPUID(int eax, int *ebx, int *ecx, int *edx); // Keyboard driver: void keyboardDriverUpdate(void); void getline(char *buffer, int len); void keyboard_init(void); // Timer: void timerDriverUpdate(void); uint64_t getTimeMS(); void timer_init(void); // Multiboot: extern uint64_t available_memory; extern uint64_t ramdisk_location; void read_multiboot_info(void); // Shell void shell(void); #endif