diff options
| author | Igor Mammedov <imammedo@redhat.com> | 2018-02-28 15:23:49 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2018-03-13 23:09:50 +0200 |
| commit | d0384d9020f1f52f90e5e5b1b6c9c04aac5f6756 (patch) | |
| tree | c59d6c6126faccac7ed9c467bfc0db656560ed06 /hw | |
| parent | b8e0f5898254ebb53f82225d40f4a58645279039 (diff) | |
| download | qemu-d0384d9020f1f52f90e5e5b1b6c9c04aac5f6756.tar.gz | |
acpi: add build_append_gas() helper for Generic Address Structure
it will help to add Generic Address Structure to ACPI tables
without using packed C structures and avoid endianness
issues as API doesn't need an explicit conversion.
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/acpi/aml-build.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c index 36a6cc450e..3fef5f6abf 100644 --- a/hw/acpi/aml-build.c +++ b/hw/acpi/aml-build.c @@ -258,6 +258,22 @@ static void build_append_int(GArray *table, uint64_t value) } } +/* Generic Address Structure (GAS) + * ACPI 2.0/3.0: 5.2.3.1 Generic Address Structure + * 2.0 compat note: + * @access_width must be 0, see ACPI 2.0:Table 5-1 + */ +void build_append_gas(GArray *table, AmlAddressSpace as, + uint8_t bit_width, uint8_t bit_offset, + uint8_t access_width, uint64_t address) +{ + build_append_int_noprefix(table, as, 1); + build_append_int_noprefix(table, bit_width, 1); + build_append_int_noprefix(table, bit_offset, 1); + build_append_int_noprefix(table, access_width, 1); + build_append_int_noprefix(table, address, 8); +} + /* * Build NAME(XXXX, 0x00000000) where 0x00000000 is encoded as a dword, * and return the offset to 0x00000000 for runtime patching. |