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Code Issues Releases Wiki Activity

🆕 HPET驱动

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This commit is contained in:
fslongjin
2022-04-08 12:20:53 +08:00
parent 8bf4da2afa
commit d887f9a0f7
12 changed files with 259 additions and 36 deletions
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16
kernel/driver/acpi/acpi.c
View File

@ -84,6 +84,22 @@ bool acpi_get_MADT(const struct acpi_system_description_table_header_t *_iter_da
return true;
}
/**
* @brief 获取HPET HPET_description_table
*
* @param _iter_data 要被迭代的信息的结构体
* @param _data 返回的HPET表的虚拟地址
* @return true
* @return false
*/
bool acpi_get_HPET(const struct acpi_system_description_table_header_t *_iter_data, void *_data)
{
if (!(_iter_data->Signature[0] == 'H' && _iter_data->Signature[1] == 'P' && _iter_data->Signature[2] == 'E' && _iter_data->Signature[3] == 'T'))
return false;
*(ul *)_data = (ul)_iter_data;
return true;
}
/**
* @brief 初始化acpi模块

41
kernel/driver/acpi/acpi.h
View File

@ -42,7 +42,7 @@ struct acpi_RSDP_t
// 32bit physical address of the RSDT
uint RsdtAddress;
};
} __attribute__((packed));
struct acpi_RSDP_2_t
{
@ -56,7 +56,7 @@ struct acpi_RSDP_2_t
unsigned char ExtendedChecksum; // 整个表的checksum，包括了之前的checksum区域
unsigned char Reserved[3];
};
} __attribute__((packed));
struct acpi_system_description_table_header_t
{
@ -74,7 +74,32 @@ struct acpi_system_description_table_header_t
uint OEMRevision;
uint CreatorID;
uint CreatorRevision;
};
} __attribute__((packed));
// HPET描述符结构体，sign为HPET
struct acpi_HPET_description_table_t
{
struct acpi_system_description_table_header_t header;
uint8_t hardware_rev_id;
uint8_t comparator_count : 5; // Number of Comparators in 1st Timer Block
uint8_t counter_size : 1; // COUNT_SIZE_CAP counter size
uint8_t reserved0 : 1;
uint8_t legacy_replacement : 1; // LegacyReplacement IRQ Routing Capable
uint16_t pci_vendor_id; // PCI Vendor ID of 1st Timer Block
uint8_t address_space_id; // 0 - system memory, 1 - system I/O
uint8_t register_bit_width;
uint8_t register_bit_offset;
uint8_t reserved1;
uint64_t address;
uint8_t hpet_number;
uint16_t minimum_tick; // The minimum clock ticks can be set without lost interrupts while the counter is programmed to operate in periodic mode
uint8_t page_protection;
} __attribute__((packed));
// =========== MADT结构，其中Signature为APIC ============
struct acpi_Multiple_APIC_Description_Table_t
@ -161,7 +186,15 @@ void acpi_iter_SDT(bool (*_fun)(const struct acpi_system_description_table_heade
*/
bool acpi_get_MADT(const struct acpi_system_description_table_header_t *_iter_data, void *_data);
/**
* @brief 获取HPET HPET_description_table
*
* @param _iter_data 要被迭代的信息的结构体
* @param _data 返回的HPET表的虚拟地址
* @return true
* @return false
*/
bool acpi_get_HPET(const struct acpi_system_description_table_header_t *_iter_data, void *_data);
// 初始化acpi模块
void acpi_init();