提交 c1637e9c 编写于 作者: B Bob Moore 提交者: Len Brown

ACPICA: Add write support for DataTable operation regions

The original implementation only supported reading from a DataTable
region. However, some machines have been seen that actually write
to the ACPI table contained in such a region. This change adds
support for writing to a DataTable region.
Signed-off-by: NBob Moore <robert.moore@intel.com>
Signed-off-by: NLin Ming <ming.m.lin@intel.com>
Signed-off-by: NLen Brown <len.brown@intel.com>
上级 333b04ae
......@@ -491,8 +491,10 @@ acpi_ex_data_table_space_handler(u32 function,
{
ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
/* Perform the memory read or write */
/*
* Perform the memory read or write. The bit_width was already
* validated.
*/
switch (function) {
case ACPI_READ:
......@@ -502,9 +504,14 @@ acpi_ex_data_table_space_handler(u32 function,
break;
case ACPI_WRITE:
ACPI_MEMCPY(ACPI_PHYSADDR_TO_PTR(address),
ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width));
break;
default:
return_ACPI_STATUS(AE_SUPPORT);
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
return_ACPI_STATUS(AE_OK);
......
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