在acpi中使用mmio来映射rsdt表(#40)

* 在acpi中使用mmio来映射rsdt表

* bugfix: 修复page fault的问题

Co-authored-by: fslongjin <[email protected]>

kernel/driver/acpi/acpi.c

@@ -3,8 +3,9 @@
 #include <common/kprint.h>
 #include <driver/multiboot2/multiboot2.h>
 #include <mm/mm.h>
+#include <mm/mmio.h>
 
-#define acpi_get_RSDT_entry_vaddr(phys_addr) (ACPI_DESCRIPTION_HEDERS_BASE + (phys_addr)-acpi_RSDT_entry_phys_base) // 获取RSDT entry的虚拟地址
+#define acpi_get_RSDT_entry_vaddr(phys_addr) (acpi_description_header_base + (phys_addr)-acpi_RSDT_entry_phys_base) // 获取RSDT entry的虚拟地址
 // #define acpi_get_XSDT_entry_vaddr(phys_addr) (ACPI_DESCRIPTION_HEDERS_BASE + (phys_addr)-acpi_XSDT_entry_phys_base) // 获取XSDT entry的虚拟地址
 
 static struct acpi_RSDP_t *rsdpv1;
@@ -22,7 +23,9 @@ static uint acpi_XSDT_Entry_num = 0;
 
 static ul acpi_RSDT_entry_phys_base = 0; // RSDT中的第一个entry所在物理页的基地址
 
-static uint64_t acpi_madt_vaddr = 0;    // MADT的虚拟地址
+static uint64_t acpi_madt_vaddr = 0;              // MADT的虚拟地址
+static uint64_t acpi_rsdt_virt_addr_base = 0;     // RSDT的虚拟地址
+static uint64_t acpi_description_header_base = 0; // RSDT中的第一个entry所在虚拟地址
 
 // static ul acpi_XSDT_entry_phys_base = 0; // XSDT中的第一个entry所在物理页的基地址
 
@@ -41,8 +44,8 @@ void acpi_iter_SDT(bool (*_fun)(const struct acpi_system_description_table_heade
         ul *ent = &(xsdt->Entry);
         for (int i = 0; i < acpi_XSDT_Entry_num; ++i)
         {
-            mm_map_phys_addr(ACPI_XSDT_DESCRIPTION_HEDERS_BASE + PAGE_2M_SIZE * i, (*(ent + i)) & PAGE_2M_MASK, PAGE_2M_SIZE, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD, false);
-            sdt_header = (struct acpi_system_description_table_header_t *)((ul)(ACPI_XSDT_DESCRIPTION_HEDERS_BASE + PAGE_2M_SIZE * i));
+            mm_map_phys_addr(acpi_description_header_base + PAGE_2M_SIZE * i, (*(ent + i)) & PAGE_2M_MASK, PAGE_2M_SIZE, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD, false);
+            sdt_header = (struct acpi_system_description_table_header_t *)((ul)(acpi_description_header_base + PAGE_2M_SIZE * i));
 
             if (_fun(sdt_header, _data) == true)
                 return;
@@ -100,7 +103,6 @@ bool acpi_get_HPET(const struct acpi_system_description_table_header_t *_iter_da
     return true;
 }
 
-
 /**
  * @brief 初始化acpi模块
  *
@@ -110,26 +112,20 @@ void acpi_init()
 {
     kinfo("Initializing ACPI...");
 
-    // 获取rsdp
-
+    // 获取物理地址
     int reserved;
-    multiboot2_iter(multiboot2_get_acpi_old_RSDP, &old_acpi, &reserved);
 
+    multiboot2_iter(multiboot2_get_acpi_old_RSDP, &old_acpi, &reserved);
     rsdpv1 = &(old_acpi.rsdp);
 
-    kdebug("RSDT_phys_Address=%#018lx", rsdpv1->RsdtAddress);
-    kdebug("RSDP_Revision=%d", rsdpv1->Revision);
-
     multiboot2_iter(multiboot2_get_acpi_new_RSDP, &new_acpi, &reserved);
     rsdpv2 = &(new_acpi.rsdp);
 
-    kdebug("Rsdt_v2_phys_Address=%#018lx", rsdpv2->rsdp1.RsdtAddress);
-    kdebug("Xsdt_phys_Address=%#018lx", rsdpv2->XsdtAddress);
-    kdebug("RSDP_v2_Revision=%d", rsdpv2->rsdp1.Revision);
-
+    uint64_t paddr = 0;
     // An ACPI-compatible OS must use the XSDT if present
     if (rsdpv2->XsdtAddress != 0x00UL)
     {
+        // 不要删除这段注释（因为还不确定是代码的bug，还是真机的bug）
         /*
         acpi_use_xsdt = true;
         ul xsdt_phys_base = rsdpv2->XsdtAddress & PAGE_2M_MASK;
@@ -156,12 +152,23 @@ void acpi_init()
             mm_map_phys_addr(ACPI_XSDT_DESCRIPTION_HEDERS_BASE + PAGE_2M_SIZE * j, (*(ent + j)) & PAGE_2M_MASK, PAGE_2M_SIZE, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD, false);
         }
         */
+
         // 由于解析XSDT出现问题。暂时只使用Rsdpv2的rsdt，但是这是不符合ACPI规范的！！！
         ul rsdt_phys_base = rsdpv2->rsdp1.RsdtAddress & PAGE_2M_MASK;
         acpi_RSDT_offset = rsdpv2->rsdp1.RsdtAddress - rsdt_phys_base;
-        mm_map_phys_addr(ACPI_RSDT_VIRT_ADDR_BASE, rsdt_phys_base, PAGE_2M_SIZE, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD, false);
+
+        //申请mmio空间
+        uint64_t size = 0;
+        mmio_create(PAGE_2M_SIZE, VM_IO | VM_DONTCOPY, &acpi_rsdt_virt_addr_base, &size);
+
+        //映射rsdt表
+        paddr = (uint64_t)rsdt_phys_base;
+        mm_map(&initial_mm, acpi_rsdt_virt_addr_base, PAGE_2M_SIZE, paddr);
+
+        // rsdt表虚拟地址
+        rsdt = (struct acpi_RSDT_Structure_t *)(acpi_rsdt_virt_addr_base + acpi_RSDT_offset);
         kdebug("RSDT mapped!(v2)");
-        rsdt = (struct acpi_RSDT_Structure_t *)(ACPI_RSDT_VIRT_ADDR_BASE + acpi_RSDT_offset);
+
         // 计算RSDT Entry的数量
         kdebug("offset=%d", sizeof(rsdt->header));
         acpi_RSDT_Entry_num = (rsdt->header.Length - 36) / 4;
@@ -169,43 +176,57 @@ void acpi_init()
         printk_color(ORANGE, BLACK, "RSDT Length=%dbytes.\n", rsdt->header.Length);
         printk_color(ORANGE, BLACK, "RSDT Entry num=%d\n", acpi_RSDT_Entry_num);
 
-        mm_map_phys_addr(ACPI_RSDT_VIRT_ADDR_BASE, rsdt_phys_base, rsdt->header.Length + PAGE_2M_SIZE, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD, false);
+        //申请mmio空间
+        mmio_create(PAGE_2M_SIZE, VM_IO | VM_DONTCOPY, &acpi_description_header_base, &size);
+
         // 映射所有的Entry的物理地址
         acpi_RSDT_entry_phys_base = ((ul)(rsdt->Entry)) & PAGE_2M_MASK;
         // 由于地址只是32bit的，并且存在脏数据，这里需要手动清除高32bit，否则会触发#GP
         acpi_RSDT_entry_phys_base = MASK_HIGH_32bit(acpi_RSDT_entry_phys_base);
 
-        kdebug("entry=%#018lx", rsdt->Entry);
-        kdebug("acpi_RSDT_entry_phys_base=%#018lx", acpi_RSDT_entry_phys_base);
-        // 映射RSDT ENTRY的物理地址
-        mm_map_phys_addr(ACPI_DESCRIPTION_HEDERS_BASE, acpi_RSDT_entry_phys_base, PAGE_2M_SIZE, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD, false);
+        paddr = (uint64_t)acpi_RSDT_entry_phys_base;
+        mm_map(&initial_mm, acpi_description_header_base, PAGE_2M_SIZE, paddr);
     }
     else if (rsdpv1->RsdtAddress != (uint)0x00UL)
-    { // 映射RSDT的物理地址到页表
-        // 暂定字节数为2MB
-        // 由于页表映射的原因，需要清除低21位地址，才能填入页表
+    {
+        // rsdt表物理地址
         ul rsdt_phys_base = rsdpv1->RsdtAddress & PAGE_2M_MASK;
         acpi_RSDT_offset = rsdpv1->RsdtAddress - rsdt_phys_base;
-        mm_map_phys_addr(ACPI_RSDT_VIRT_ADDR_BASE, rsdt_phys_base, PAGE_2M_SIZE, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD, false);
+        
+        kdebug("rsdpv1->RsdtAddress=%#018lx", rsdpv1->RsdtAddress);
+        //申请mmio空间
+        uint64_t size = 0;
+        mmio_create(PAGE_2M_SIZE, VM_IO | VM_DONTCOPY, &acpi_rsdt_virt_addr_base, &size);
+
+        // kdebug("acpi_rsdt_virt_addr_base = %#018lx,size= %#010lx", acpi_rsdt_virt_addr_base, size);
+        //映射rsdt表
+        paddr = (uint64_t)rsdt_phys_base;
+        mm_map(&initial_mm, acpi_rsdt_virt_addr_base, PAGE_2M_SIZE, paddr);
+        // rsdt表虚拟地址
+        rsdt = (struct acpi_RSDT_Structure_t *)(acpi_rsdt_virt_addr_base + acpi_RSDT_offset);
         kdebug("RSDT mapped!");
-        rsdt = (struct acpi_RSDT_Structure_t *)(ACPI_RSDT_VIRT_ADDR_BASE + acpi_RSDT_offset);
+
+        // kdebug("length = %d",rsdt->header.Length);
         // 计算RSDT Entry的数量
-        kdebug("offset=%d", sizeof(rsdt->header));
+        // kdebug("offset=%d", sizeof(rsdt->header));
+
         acpi_RSDT_Entry_num = (rsdt->header.Length - 36) / 4;
 
         printk_color(ORANGE, BLACK, "RSDT Length=%dbytes.\n", rsdt->header.Length);
         printk_color(ORANGE, BLACK, "RSDT Entry num=%d\n", acpi_RSDT_Entry_num);
 
-        mm_map_phys_addr(ACPI_RSDT_VIRT_ADDR_BASE, rsdt_phys_base, rsdt->header.Length + PAGE_2M_SIZE, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD, false);
+        //申请mmio空间
+        mmio_create(PAGE_2M_SIZE, VM_IO | VM_DONTCOPY, &acpi_description_header_base, &size);
+
         // 映射所有的Entry的物理地址
         acpi_RSDT_entry_phys_base = ((ul)(rsdt->Entry)) & PAGE_2M_MASK;
         // 由于地址只是32bit的，并且存在脏数据，这里需要手动清除高32bit，否则会触发#GP
         acpi_RSDT_entry_phys_base = MASK_HIGH_32bit(acpi_RSDT_entry_phys_base);
 
-        kdebug("entry=%#018lx", rsdt->Entry);
-        kdebug("acpi_RSDT_entry_phys_base=%#018lx", acpi_RSDT_entry_phys_base);
-        // 映射RSDT ENTRY的物理地址
-        mm_map_phys_addr(ACPI_DESCRIPTION_HEDERS_BASE, acpi_RSDT_entry_phys_base, PAGE_2M_SIZE, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD, false);
+        paddr = (uint64_t)acpi_RSDT_entry_phys_base;
+        mm_map(&initial_mm, acpi_description_header_base, PAGE_2M_SIZE, paddr);
+        // kinfo("entry mapped!");
+        
     }
     else
     {
@@ -216,4 +237,5 @@ void acpi_init()
     }
 
     kinfo("ACPI module initialized!");
-}
+    return;
+}

kernel/driver/acpi/acpi.h

@@ -25,11 +25,8 @@
 #define ACPI_ICS_TYPE_PROCESSOR_GIC_ITS 0xF
 // 0x10-0x7f Reserved. OSPM skips structures of the reserved type.
 // 0x80-0xff Reserved for OEM use
-
-#define ACPI_RSDT_VIRT_ADDR_BASE SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE + ACPI_RSDT_MAPPING_OFFSET
-#define ACPI_XSDT_VIRT_ADDR_BASE SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE + ACPI_XSDT_MAPPING_OFFSET
-#define ACPI_DESCRIPTION_HEDERS_BASE ACPI_RSDT_VIRT_ADDR_BASE + (PAGE_2M_SIZE)
-#define ACPI_XSDT_DESCRIPTION_HEDERS_BASE ACPI_XSDT_VIRT_ADDR_BASE + (PAGE_2M_SIZE)
+// extern const uint64_t acpi_rsdt_virt_addr_base ;     // RSDT的虚拟地址
+// extern const uint64_t acpi_description_header_base ; // RSDT中的第一个entry所在虚拟地址
 
 bool acpi_use_xsdt = false;
 struct acpi_RSDP_t

kernel/mm/mm.c

@@ -229,6 +229,26 @@ void mm_init()
     // 初始化slab内存池
     slab_init();
     page_table_init();
+
+    initial_mm.pgd = (pml4t_t *)get_CR3();
+
+    initial_mm.code_addr_start = memory_management_struct.kernel_code_start;
+    initial_mm.code_addr_end = memory_management_struct.kernel_code_end;
+
+    initial_mm.data_addr_start = (ul)&_data;
+    initial_mm.data_addr_end = memory_management_struct.kernel_data_end;
+
+    initial_mm.rodata_addr_start = (ul)&_rodata;
+    initial_mm.rodata_addr_end = (ul)&_erodata;
+    initial_mm.bss_start = (uint64_t)&_bss;
+    initial_mm.bss_end = (uint64_t)&_ebss;
+
+    initial_mm.brk_start = memory_management_struct.start_brk;
+    initial_mm.brk_end = current_pcb->addr_limit;
+
+    initial_mm.stack_start = _stack_start;
+    initial_mm.vmas = NULL;
+    
     mmio_init();
 }
 

kernel/mm/mm.h

@@ -45,8 +45,6 @@
 // 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 0xffffa00000000000UL
 #define FRAME_BUFFER_MAPPING_OFFSET 0x3000000UL
-#define ACPI_RSDT_MAPPING_OFFSET 0x7000000UL
-#define ACPI_XSDT_MAPPING_OFFSET 0x9000000UL
 #define IO_APIC_MAPPING_OFFSET 0xfec00000UL
 #define LOCAL_APIC_MAPPING_OFFSET 0xfee00000UL
 #define AHCI_MAPPING_OFFSET 0xff200000UL // AHCI 映射偏移量,之后使用了4M的地址

kernel/mm/mmap.c

@@ -351,8 +351,10 @@ int mm_map_vma(struct vm_area_struct *vma, uint64_t paddr)
     int retval = 0;
     // 获取物理地址对应的页面
     struct Page *pg;
+    uint64_t page_flags = 0;
     if (vma->vm_flags & VM_IO) // 对于mmio的内存，创建新的page结构体
     {
+        page_flags = PAGE_PWT | PAGE_PCD;
         if (unlikely(vma->anon_vma == NULL || vma->anon_vma->page == NULL))
             pg = __create_mmio_page_struct(paddr);
         else
@@ -381,15 +383,14 @@ int mm_map_vma(struct vm_area_struct *vma, uint64_t paddr)
     /*
         todo: 限制页面的读写权限
     */
-
+    // kdebug("len2m=%d", len_2m);
     // 先映射2M页
     if (likely(len_2m > 0))
     {
-        uint64_t page_flags = 0;
         if (vma->vm_flags & VM_USER)
-            page_flags = PAGE_USER_PAGE;
+            page_flags |= PAGE_USER_PAGE;
         else
-            page_flags = PAGE_KERNEL_PAGE;
+            page_flags |= PAGE_KERNEL_PAGE;
         // 这里直接设置user标志位为false，因为该函数内部会对其进行自动校正
         retval = mm_map_proc_page_table((uint64_t)vma->vm_mm->pgd, true, vma->vm_start, paddr, len_2m, page_flags, false, false, false);
         if (unlikely(retval != 0))
@@ -400,11 +401,10 @@ int mm_map_vma(struct vm_area_struct *vma, uint64_t paddr)
     {
         len_4k = ALIGN(len_4k, PAGE_4K_SIZE);
 
-        uint64_t page_flags = 0;
         if (vma->vm_flags & VM_USER)
-            page_flags = PAGE_USER_4K_PAGE;
+            page_flags |= PAGE_USER_4K_PAGE;
         else
-            page_flags = PAGE_KERNEL_4K_PAGE;
+            page_flags |= PAGE_KERNEL_4K_PAGE;
         // 这里直接设置user标志位为false，因为该函数内部会对其进行自动校正
         retval = mm_map_proc_page_table((uint64_t)vma->vm_mm->pgd, true, vma->vm_start + len_2m, paddr + len_2m, len_4k, page_flags, false, false, true);
         if (unlikely(retval != 0))