Files
Custom-Operating-System/kernel/include/drivers/devtree.h

52 lines
1.4 KiB
C

#ifndef _KERNEL_DRIVERS_DEVTREE_H
#define _KERNEL_DRIVERS_DEVTREE_H
#include <libkern/c_attrs.h>
#include <libkern/types.h>
#include <mem/boot.h>
#define DEVTREE_HEADER_SIGNATURE ("odtr3")
#define DEVTREE_HEADER_SIGNATURE_LEN (sizeof(DEVTREE_HEADER_SIGNATURE) - 1)
struct PACKED devtree_header {
char signature[8];
uint32_t revision;
uint32_t flags;
uint32_t entries_count;
uint32_t name_list_offset;
};
typedef struct devtree_header devtree_header_t;
#define DEVTREE_ENTRY_FLAGS_MMIO = (1 << 0)
#define DEVTREE_ENTRY_TYPE_IO (0)
#define DEVTREE_ENTRY_TYPE_FB (1)
#define DEVTREE_ENTRY_TYPE_UART (2)
#define DEVTREE_ENTRY_TYPE_RAM (3)
#define DEVTREE_ENTRY_TYPE_STORAGE (4)
#define DEVTREE_ENTRY_TYPE_BUS_CONTROLLER (5)
#define DEVTREE_ENTRY_TYPE_RTC (6)
struct PACKED devtree_entry {
uint32_t type;
uint32_t flags;
uint64_t region_base;
uint64_t region_size;
uint32_t irq_lane;
uint32_t irq_flags;
uint32_t irq_priority;
uint32_t rel_name_offset;
uint64_t aux1;
uint64_t aux2;
uint64_t aux3;
uint64_t aux4;
};
typedef struct devtree_entry devtree_entry_t;
int devtree_init(boot_args_t* boot_args);
devtree_entry_t* devtree_find_device(const char* name);
const char* devtree_name_of_entry(devtree_entry_t* en);
devtree_entry_t* devtree_new_entry(const devtree_entry_t* from);
uint32_t devtree_new_entry_name(const char* ptr);
#endif // _KERNEL_DRIVERS_DEVTREE_H