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Code Issues Releases Wiki Activity

打印中断控制器结构的信息

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This commit is contained in:
fslongjin
2022-03-13 17:12:20 +08:00
parent 9dd1c65cae
commit 1f3c8bc204
6 changed files with 119 additions and 47 deletions
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14
kernel/mm/mm.c
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@ -492,7 +492,7 @@ void init_frame_buffer()
{
kinfo("Re-mapping VBE frame buffer...");
global_CR3 = get_CR3();
ul fb_virt_addr = 0xffff800008000000;
ul fb_virt_addr = SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE + FRAME_BUFFER_MAPPING_OFFSET;
ul fb_phys_addr = get_VBE_FB_phys_addr();
// 计算帧缓冲区的线性地址对应的pml4页表项的地址
@ -514,24 +514,23 @@ void init_frame_buffer()
ul vbe_fb_length = get_VBE_FB_length();
ul *tmp1;
// 初始化2M物理页
for (ul i = 0; i < (vbe_fb_length<<2); i += PAGE_2M_SIZE)
for (ul i = 0; i < (vbe_fb_length << 2); i += PAGE_2M_SIZE)
{
// 计算当前2M物理页对应的pdt的页表项的物理地址
tmp1 = phys_2_virt((ul *)(*tmp & (~0xfffUL)) + (((ul)(fb_virt_addr + i) >> PAGE_2M_SHIFT) & 0x1ff));
// 页面写穿，禁止缓存
set_pdt(tmp1, mk_pdt((ul)fb_phys_addr+i, PAGE_KERNEL_PAGE| PAGE_PWT| PAGE_PCD));
set_pdt(tmp1, mk_pdt((ul)fb_phys_addr + i, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD));
}
set_pos_VBE_FB_addr((uint*)fb_virt_addr);
set_pos_VBE_FB_addr((uint *)fb_virt_addr);
flush_tlb();
kinfo("VBE frame buffer successfully Re-mapped!");
}
/**
* @brief 将物理地址映射到页表的函数
*
*
* @param virt_addr_start 要映射到的虚拟地址的起始位置
* @param phys_addr_start 物理地址的起始位置
* @param length 要映射的区域的长度（字节）
@ -565,11 +564,10 @@ void mm_map_phys_addr(ul virt_addr_start, ul phys_addr_start, ul length, ul flag
tmp1 = phys_2_virt((ul *)(*tmp & (~0xfffUL)) + (((ul)(virt_addr_start + i) >> PAGE_2M_SHIFT) & 0x1ff));
// 页面写穿，禁止缓存
set_pdt(tmp1, mk_pdt((ul)phys_addr_start+i, flags));
set_pdt(tmp1, mk_pdt((ul)phys_addr_start + i, flags));
++js;
}
kdebug("js=%d", js);
flush_tlb();
}

5
kernel/mm/mm.h
View File

@ -35,6 +35,11 @@
#define Virt_To_2M_Page(kaddr) (memory_management_struct.pages_struct + (virt_2_phys(kaddr) >> PAGE_2M_SHIFT))
#define Phy_to_2M_Page(kaddr) (memory_management_struct.pages_struct + ((unsigned long)(kaddr) >> PAGE_2M_SHIFT))
// 在这个地址以上的虚拟空间，用来进行特殊的映射
#define SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE 0xffff800000000000UL
#define FRAME_BUFFER_MAPPING_OFFSET 0x3000000UL
#define ACPI_RSDT_MAPPING_OFFSET 0x7000000UL
#define IO_APIC_MAPPING_OFFSET 0x8000000UL
// ===== 内存区域属性 =====
// DMA区域
#define ZONE_DMA (1 << 0)