ACPI_STATUS
AcpiWalkResources (
ACPI_HANDLE DeviceHandle,
char *Name,
ACPI_WALK_RESOURCE_CALLBACK UserFunction,
void *Context)
{
ACPI_STATUS Status;
ACPI_BUFFER Buffer;
ACPI_FUNCTION_TRACE (AcpiWalkResources);
/* Parameter validation */
if (!DeviceHandle || !UserFunction || !Name ||
(!ACPI_COMPARE_NAME (Name, METHOD_NAME__CRS) &&
!ACPI_COMPARE_NAME (Name, METHOD_NAME__PRS) &&
!ACPI_COMPARE_NAME (Name, METHOD_NAME__AEI) &&
!ACPI_COMPARE_NAME (Name, METHOD_NAME__DMA)))
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Get the _CRS/_PRS/_AEI/_DMA resource list */
Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
Status = AcpiRsGetMethodData (DeviceHandle, Name, &Buffer);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Walk the resource list and cleanup */
Status = AcpiWalkResourceBuffer (&Buffer, UserFunction, Context);
ACPI_FREE (Buffer.Pointer);
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiWalkResources (
ACPI_HANDLE DeviceHandle,
char *Name,
ACPI_WALK_RESOURCE_CALLBACK UserFunction,
void *Context)
{
ACPI_STATUS Status;
ACPI_BUFFER Buffer;
ACPI_RESOURCE *Resource;
ACPI_RESOURCE *ResourceEnd;
ACPI_FUNCTION_TRACE (AcpiWalkResources);
/* Parameter validation */
if (!DeviceHandle || !UserFunction || !Name ||
(!ACPI_COMPARE_NAME (Name, METHOD_NAME__CRS) &&
!ACPI_COMPARE_NAME (Name, METHOD_NAME__PRS) &&
!ACPI_COMPARE_NAME (Name, METHOD_NAME__AEI)))
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Get the _CRS/_PRS/_AEI resource list */
Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
Status = AcpiRsGetMethodData (DeviceHandle, Name, &Buffer);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Buffer now contains the resource list */
Resource = ACPI_CAST_PTR (ACPI_RESOURCE, Buffer.Pointer);
ResourceEnd = ACPI_ADD_PTR (ACPI_RESOURCE, Buffer.Pointer, Buffer.Length);
/* Walk the resource list until the EndTag is found (or buffer end) */
while (Resource < ResourceEnd)
{
/* Sanity check the resource */
if (Resource->Type > ACPI_RESOURCE_TYPE_MAX)
{
Status = AE_AML_INVALID_RESOURCE_TYPE;
break;
}
/* Invoke the user function, abort on any error returned */
Status = UserFunction (Resource, Context);
if (ACPI_FAILURE (Status))
{
if (Status == AE_CTRL_TERMINATE)
{
/* This is an OK termination by the user function */
Status = AE_OK;
}
break;
}
/* EndTag indicates end-of-list */
if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG)
{
break;
}
/* Get the next resource descriptor */
Resource = ACPI_ADD_PTR (ACPI_RESOURCE, Resource, Resource->Length);
}
ACPI_FREE (Buffer.Pointer);
return_ACPI_STATUS (Status);
}
