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Author SHA1 Message Date
antifallobst b89c2fba83 docs: documented basic ACPI implementation 2023-03-11 11:05:26 +01:00
antifallobst fedca7b7e4 fix (acpi): fixed oem_id field in RSDP_v1 struct 2023-03-11 11:04:47 +01:00
2 changed files with 34 additions and 2 deletions
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32
.wiki/Kernel-documentation.md
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@ -326,6 +326,38 @@ More information can be found on the limine project's [GitHub](https://github.co
## drivers
### acpi/acpi.h
OSDev Wiki: [ACPI](https://wiki.osdev.org/ACPI)
#### `acpi_init(boot_info)` - function (void)
Initializes the ACPI (Advanced Configuration and Power Interface).
### acpi/rsdp.h
OSDev Wiki: [RSDP](https://wiki.osdev.org/RSDP)
#### `rsdp_descriptor_v1_T` - struct [packed]
The RSDP Table used in ACPI v1.0
| Name | Type | Description |
|--------------|----------|-----------------------------------------------------------|
| signature | char[8] | Needs to be `"RSD PTR "` (with the withespace at the end) |
| checksum | uint8_t | Used to validate the table |
| oem_id | char[6] | This string identifies the OEM |
| revision | uint8_t | Tells whether the RSDP is version 1 or 2+ |
| rsdt_address | uint32_t | The Physical Address of the RSDT |
#### `rsdp_descriptor_v2_T` - struct [packed]
The RSDP Table used in ACPI v2.0 or higher
| Name | Type | Description |
|-------------------|----------------------|----------------------------------------------------------------------------------|
| descriptor_v1 | rsdp_descriptor_v1_T | A table in the format of the ACPI 1.0 specification |
| length | uint32_t | The size of the whole table |
| xsdt_address | uint64_t | The Address of the XSDT (when available this should be used instead of the RSDT) |
| checksum_extended | uint8_t | Used to calculate the checksum of the whole table |
| reserved | uint8_t[3] | Can be ignored |
### elf/elf.h
#### `elf_executable_T` - struct
This struct holds the parsed data of an ELF executable.

2
kernel/inc/drivers/acpi/rsdp.h
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@ -8,7 +8,7 @@
typedef struct {
char signature [8];
uint8_t checksum;
char oem_id;
char oem_id [6];
uint8_t revision;
uint32_t rsdt_address;
} __attribute__((packed)) rsdp_descriptor_v1_T;