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acpi add aml_dma()

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Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2015-12-10 00:41:15 +01:00 committed by Michael S. Tsirkin
parent 25c1432ebe
commit a23b887281
2 changed files with 34 additions and 0 deletions
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14
hw/acpi/aml-build.c
View File

@ -1275,6 +1275,20 @@ Aml *aml_qword_memory(AmlDecode dec, AmlMinFixed min_fixed,
addr_trans, len, flags);
}
/* ACPI 1.0b: 6.4.2.2 DMA Format/6.4.2.2.1 ASL Macro for DMA Descriptor */
Aml *aml_dma(AmlDmaType typ, AmlDmaBusMaster bm, AmlTransferSize sz,
uint8_t channel)
{
Aml *var = aml_alloc();
uint8_t flags = sz | bm << 2 | typ << 5;
assert(channel < 8);
build_append_byte(var->buf, 0x2A); /* Byte 0: DMA Descriptor */
build_append_byte(var->buf, 1U << channel); /* Byte 1: _DMA - DmaChannel */
build_append_byte(var->buf, flags); /* Byte 2 */
return var;
}
/* ACPI 1.0b: 16.2.5.3 Type 1 Opcodes Encoding: DefSleep */
Aml *aml_sleep(uint64_t msec)
{

20
include/hw/acpi/aml-build.h
View File

@ -34,6 +34,24 @@ struct Aml {
};
typedef struct Aml Aml;
typedef enum {
AML_COMPATIBILITY = 0,
AML_TYPEA = 1,
AML_TYPEB = 2,
AML_TYPEF = 3,
} AmlDmaType;
typedef enum {
AML_NOTBUSMASTER = 0,
AML_BUSMASTER = 1,
} AmlDmaBusMaster;
typedef enum {
AML_TRANSFER8 = 0,
AML_TRANSFER8_16 = 1,
AML_TRANSFER16 = 2,
} AmlTransferSize;
typedef enum {
AML_DECODE10 = 0,
AML_DECODE16 = 1,
@ -305,6 +323,8 @@ Aml *aml_qword_memory(AmlDecode dec, AmlMinFixed min_fixed,
uint64_t addr_gran, uint64_t addr_min,
uint64_t addr_max, uint64_t addr_trans,
uint64_t len);
Aml *aml_dma(AmlDmaType typ, AmlDmaBusMaster bm, AmlTransferSize sz,
uint8_t channel);
Aml *aml_sleep(uint64_t msec);
/* Block AML object primitives */