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arch/x86: Add a function to retrieve ID from ACPI's DMAR

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This will be necessary to get IOAPIC and HPET source ids for VT-D.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
This commit is contained in:
Tomasz Bursztyka 2021-04-06 11:15:43 +02:00 • committed by Anas Nashif
commit 345e122dd2
2 changed files with 65 additions and 0 deletions
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13
include/arch/x86/acpi.h
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@ -159,6 +159,16 @@ struct acpi_dmar {
struct acpi_dmar_entry remap_entries[];
} __packed;
union acpi_dmar_id {
struct {
uint16_t function : 3;
uint16_t device : 5;
uint16_t bus : 8;
} bits;
uint16_t raw;
};
#if defined(CONFIG_ACPI)
void *z_acpi_find_table(uint32_t signature);
@ -175,6 +185,8 @@ struct acpi_dmar_dev_scope *z_acpi_get_drhd_dev_scopes(struct acpi_drhd *drhd,
struct acpi_dmar_dev_path *
z_acpi_get_dev_scope_paths(struct acpi_dmar_dev_scope *dev_scope, int *n);
uint16_t z_acpi_get_dev_id_from_dmar(uint8_t dev_scope_type);
#else /* CONFIG_ACPI */
#define z_acpi_find_table(...) NULL
@ -183,6 +195,7 @@ z_acpi_get_dev_scope_paths(struct acpi_dmar_dev_scope *dev_scope, int *n);
#define z_acpi_find_drhds(...) NULL
#define z_acpi_get_drhd_dev_scopes(...) NULL
#define z_acpi_get_dev_scope_paths(...) NULL
#define z_acpi_get_dev_id_from_dmar(...) USHRT_MAX
#endif /* CONFIG_ACPI */