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🆕 初始化内存池组

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This commit is contained in:
fslongjin
2022-02-25 12:15:09 +08:00
parent dc3aa2ae8a
commit 8e1a0c9a4b
5 changed files with 155 additions and 40 deletions
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29
kernel/mm/mm.c
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@ -18,7 +18,7 @@ void mm_init()
struct multiboot_mmap_entry_t *mb2_mem_info;
int count;
multiboot2_iter(multiboot2_get_memory, mb2_mem_info, &count);
for (int i = 0; i < count; ++i)
{
//可用的内存
@ -68,7 +68,7 @@ void mm_init()
memory_management_struct.bmp_len = (((unsigned long)(max_addr >> PAGE_2M_SHIFT) + sizeof(unsigned long) * 8 - 1) / 8) & (~(sizeof(unsigned long) - 1)); // bmp由多少个unsigned long变量组成
// 初始化bitmap， 先将整个bmp空间全部置位。稍后再将可用物理内存页复位。
memset(memory_management_struct.bmp, 0xff, memory_management_struct.bmp_len);
memset(memory_management_struct.bmp, 0xffffffffffffffff, memory_management_struct.bmp_len);
// 初始化内存页结构
// 将页结构映射于bmp之后
@ -184,18 +184,6 @@ void mm_init()
global_CR3 = get_CR3();
/*
printk_color(INDIGO, BLACK, "cr3:\t%#018lx\n", cr3);
printk_color(INDIGO, BLACK, "*cr3:\t%#018lx\n", *(phys_2_virt(cr3)) & (~0xff));
printk_color(INDIGO, BLACK, "**cr3:\t%#018lx\n", *phys_2_virt(*(phys_2_virt(cr3)) & (~0xff)) & (~0xff));
*/
/*
// 消除一致性页表映射，将页目录（PML4E）的前10项清空
for (int i = 0; i < 10; ++i)
*(phys_2_virt(global_CR3) + i) = 0UL;
*/
flush_tlb();
kinfo("Memory management unit initialize complete!");
@ -347,4 +335,15 @@ unsigned long page_clean(struct Page *p)
++p->zone->count_pages_free;
--p->zone->total_pages_link;
}
}
}
/**
* @brief 释放连续number个内存页
*
* @param page 第一个要被释放的页面的结构体
* @param number 要释放的内存页数量 number<64
*/
void free_pages(struct Page *page, int number)
{
// @todo: 释放连续number个内存页
}