解析RSDT header的sign信息

This commit is contained in:
fslongjin 2022-03-13 14:59:31 +08:00
parent a879bada0a
commit 9dd1c65cae
3 changed files with 60 additions and 16 deletions

View File

@ -49,6 +49,9 @@ typedef long long int ll;
#define max(x, y) ((x > y) ? (x) : (y))
#define min(x, y) ((x < y) ? (x) : (y))
// 遮罩高32bit
#define MASK_HIGH_32bit(x) (x & (0x00000000ffffffffUL))
// 四舍五入成整数
ul round(double x)
{

View File

@ -8,8 +8,16 @@ static struct acpi_RSDP_t *rsdpv1;
static struct acpi_RSDP_2_t *rsdpv2;
static struct acpi_RSDT_Structure_t *rsdt;
static struct multiboot_tag_old_acpi_t old_acpi;
static struct multiboot_tag_new_acpi_t new_acpi;
static ul acpi_RSDT_offset = 0;
static uint acpi_RSDT_Entry_num = 0;
// RSDT中的第一个entry所在物理页的基地址
static ul acpi_RSDT_entry_phys_base = 0;
/**
* @brief ACPI标准文件的Table 5-29
* @param _fun
@ -20,6 +28,10 @@ void acpi_iter_SDT(bool (*_fun)(const struct acpi_iter_SDT_header_t *, void *),
{
}
static ul acpi_get_RSDT_entry_vaddr(ul phys_addr)
{
return ACPI_DESCRIPTION_HEDERS_BASE + MASK_HIGH_32bit(phys_addr) - acpi_RSDT_entry_phys_base;
}
/**
* @brief acpi模块
*
@ -29,37 +41,63 @@ void acpi_init()
kinfo("Initializing ACPI...");
// 获取rsdp
struct multiboot_tag_old_acpi_t tmp1;
int reserved;
multiboot2_iter(multiboot2_get_acpi_old_RSDP, &tmp1, &reserved);
multiboot2_iter(multiboot2_get_acpi_old_RSDP, &old_acpi, &reserved);
*rsdpv1 = (tmp1.rsdp);
*rsdpv1 = (old_acpi.rsdp);
kdebug("Rsdt_phys_Address=%#018lx", rsdpv1->RsdtAddress);
kdebug("RSDT_phys_Address=%#018lx", rsdpv1->RsdtAddress);
kdebug("RSDP_Revision=%d", rsdpv1->Revision);
// 映射RSDT区域的物理地址到页表
// 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
ul base = rsdpv1->RsdtAddress & (~(0x1fffff));
acpi_RSDT_offset = rsdpv1->RsdtAddress - base;
mm_map_phys_addr(ACPI_RSDT_VIRT_ADDR_BASE, base, PAGE_2M_SIZE, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD);
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);
kdebug("RSDT mapped!");
struct multiboot_tag_new_acpi_t tmp2;
multiboot2_iter(multiboot2_get_acpi_new_RSDP, &tmp2, &reserved);
*rsdpv2 = tmp2.rsdp;
multiboot2_iter(multiboot2_get_acpi_new_RSDP, &new_acpi, &reserved);
*rsdpv2 = new_acpi.rsdp;
kdebug("Rsdt_v2_phys_Address=%#018lx", rsdpv2->rsdp1.RsdtAddress);
kdebug("RSDP_v2_Revision=%d", rsdpv2->rsdp1.Revision);
rsdt = ACPI_RSDT_VIRT_ADDR_BASE + acpi_RSDT_offset;
// 计算RSDT Entry的数量
acpi_RSDT_Entry_num = (rsdt->header.Length - 32) / 4;
kdebug("offset=%d", sizeof(rsdt->header));
acpi_RSDT_Entry_num = (rsdt->header.Length - 36) / 4;
printk_color(ORANGE, BLACK, "%s\n", rsdt->header.Signature);
printk_color(ORANGE, BLACK, "RSDT Length=%dbytes.\n", rsdt->header.Length);
printk_color(ORANGE, BLACK, "RSDT Entry num=%d\n", acpi_RSDT_Entry_num);
// 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);
mm_map_phys_addr(ACPI_DESCRIPTION_HEDERS_BASE, acpi_RSDT_entry_phys_base, PAGE_2M_SIZE, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD);
// 设置第一个entry的虚拟地址
struct acpi_system_description_table_header_t *sdt_header;
uint* ent = &(rsdt->Entry);
for (int i = 0; i < acpi_RSDT_Entry_num; ++i)
{
kdebug("entry_addr_phys[ %d ]= %#018lx", i, MASK_HIGH_32bit((ul)(*(ent+i))));
sdt_header = (struct acpi_system_description_table_header_t *)(acpi_get_RSDT_entry_vaddr((ul)(*(ent+i))));
if(i<7)
{
struct acpi_Multiple_APIC_Description_Table_t *madt = (struct acpi_Multiple_APIC_Description_Table_t*)sdt_header;
for(int j=0;j<4;++j)
printk_color(ORANGE, BLACK, "%c", madt->header.Signature[j]);
printk("\n");
kdebug("length=%d", madt->header.Length);
}
}
}

View File

@ -26,6 +26,9 @@
// 0x80-0xff Reserved for OEM use
#define ACPI_RSDT_VIRT_ADDR_BASE 0xffff80000a000000UL
#define ACPI_DESCRIPTION_HEDERS_BASE ACPI_RSDT_VIRT_ADDR_BASE + PAGE_2M_SIZE
struct acpi_RSDP_t
{
@ -123,7 +126,7 @@ struct acpi_RSDT_Structure_t
struct acpi_system_description_table_header_t header;
// 一个包含了n个32bit物理地址的数组指向了其他的description headers
uint *Entry;
uint Entry;
};
// =========== XSDT 结构 =============
@ -149,7 +152,7 @@ struct acpi_iter_SDT_header_t
* @param _data
*/
void acpi_iter_SDT(bool (*_fun)(const struct acpi_iter_SDT_header_t *, void *),
void *_data);
void *_data);
/**
* @brief MADT信息