class AcpiMemoryRegion
Defined at line 20 of file ../../src/graphics/display/drivers/intel-display/acpi-memory-region.h
A subset of an ACPI custom Operation Region mapped into this process.
Public Methods
zx::result<AcpiMemoryRegion> Create (zx::unowned_resource mmio_resource, zx_paddr_t region_base, size_t region_size)Creates a memory region of `region_size` bytes starting at `region_base`.
`mmio_resource` must be of kind `ZX_RSRC_KIND_MMIO` and must have access
to [region_base, region_base + region_size).
The `region_base` and `region_size` should refer to memory that is entirely
contained within a memory region in the system's ACPI (Advanced
Configuration and Power Interface) tables that is marked as NVS (saved
during the Non-Volatile Sleep state)
Defined at line 28 of file ../../src/graphics/display/drivers/intel-display/acpi-memory-region.cc
void AcpiMemoryRegion ()Creates an empty memory region without any backing VMO.
Defined at line 35 of file ../../src/graphics/display/drivers/intel-display/acpi-memory-region.h
void AcpiMemoryRegion (const AcpiMemoryRegion & )Copying is not allowed.
Defined at line 53 of file ../../src/graphics/display/drivers/intel-display/acpi-memory-region.h
AcpiMemoryRegion & operator= (const AcpiMemoryRegion & )Defined at line 54 of file ../../src/graphics/display/drivers/intel-display/acpi-memory-region.h
void AcpiMemoryRegion (zx::vmo region_vmo, cpp20::span<uint8_t> region_data)Creates a representation of an already-mapped memory region.
This constructor is exposed for testing convenience. Production usage
should prefer Create(), which handles mapping physical memory.
If `region_vmo` is a valid VMO, the newly created instance keeps the VMO
alive throughout its life, and unmaps the pages that contain `region_data`
upon destruction.
If `region_vmo` is not a valid VMO, the caller must ensure that the memory
backing `region_data` stays alive while the newly created instance exists.
`region_data` must not be empty.
Defined at line 60 of file ../../src/graphics/display/drivers/intel-display/acpi-memory-region.cc
bool is_empty ()Defined at line 62 of file ../../src/graphics/display/drivers/intel-display/acpi-memory-region.h
cpp20::span<uint8_t> data ()The mapped memory. Empty iff this is an empty memory region.
Defined at line 65 of file ../../src/graphics/display/drivers/intel-display/acpi-memory-region.h
void AcpiMemoryRegion (AcpiMemoryRegion && rhs)Moving is allowed so AcpiMemoryRegion can be used as a return type.
Defined at line 65 of file ../../src/graphics/display/drivers/intel-display/acpi-memory-region.cc
cpp20::span<const uint8_t> data ()Defined at line 66 of file ../../src/graphics/display/drivers/intel-display/acpi-memory-region.h
zx::unowned_vmo vmo_for_testing ()Defined at line 68 of file ../../src/graphics/display/drivers/intel-display/acpi-memory-region.h
AcpiMemoryRegion & operator= (AcpiMemoryRegion && rhs)Defined at line 70 of file ../../src/graphics/display/drivers/intel-display/acpi-memory-region.cc
void ~AcpiMemoryRegion ()Defined at line 81 of file ../../src/graphics/display/drivers/intel-display/acpi-memory-region.cc