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# ifndef ONIX_MEMORY_H
# define ONIX_MEMORY_H
# include <onix/types.h>
# include <onix/onix.h>
# include <onix/printk.h>
# include <onix/assert.h>
# include <onix/stdlib.h>
# define PAGE_SIZE 0x1000 // 一页的大小 4K
# define MEMORY_BASE 0x100000 // 1M，
# define ZONE_VALID 1 // 可用内存区域
# define ZONE_RESERVED 2 // 不可用内存区域
# define IDX(addr) (((usize)addr) >> 12) // 获得 addr 的页索引, 每页是4k大小, 2的12次方 是4k, 地址直接除以4096就得到了地址所在页的索引
# define PAGE(idx) (((usize)addr) << 12) // 和上面相反, 这里是获得某个页的起始位置
void memory_init ( u32 magic , u32 * addr , u8 * mem_struct_buffer_addr ) ; // 这个在strat.asm中调用
void memory_map_init ( ) ; // c程序调用
typedef struct mem_struct
{
u64 base ; // 内存基地址
u64 size ; // 内存长度
u32 type ; // 类型
} _packed mem_struct ;
// 获得一页空闲的内存
static u32 get_page ( ) ;
// 释放一页空闲的内存
static void put_page ( u32 addr ) ;
# endif