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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2019 Ahmad Fatoum
*/
#ifndef __ACPI_H_
#define __ACPI_H_
#include <linux/string.h>
#include <linux/types.h>
#include <driver.h>
typedef char acpi_sig_t[4];
struct __packed acpi_rsdp { /* root system description pointer */
char signature[8];
u8 checksum;
u8 oem_id[6];
u8 revision;
u32 rsdt_addr;
};
struct __packed acpi2_rsdp { /* root system description */
struct acpi_rsdp acpi1;
u32 length;
u64 xsdt_addr;
u8 extended_checksum;
u8 reserved[3];
};
struct __packed acpi_sdt { /* system description table header */
acpi_sig_t signature;
u32 len;
u8 revision;
u8 checksum;
char oem_id[6];
char oem_table_id[8];
u32 oem_revision;
u32 creator_id;
u32 creator_revision;
};
struct __packed acpi_rsdt { /* system description table header */
struct acpi_sdt sdt;
struct acpi_sdt * __aligned(8) entries[];
};
struct acpi_driver {
struct driver_d driver;
acpi_sig_t signature;
};
extern struct bus_type acpi_bus;
static inline struct acpi_driver *to_acpi_driver(struct driver_d *drv)
{
return container_of(drv, struct acpi_driver, driver);
}
#define device_acpi_driver(drv) \
register_driver_macro(device, acpi, drv)
static inline int acpi_driver_register(struct acpi_driver *acpidrv)
{
acpidrv->driver.bus = &acpi_bus;
return register_driver(&acpidrv->driver);
}
static inline int acpi_sigcmp(const acpi_sig_t sig_a, const acpi_sig_t sig_b)
{
return memcmp(sig_a, sig_b, sizeof(acpi_sig_t));
}
#endif
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