ACPICA: Expand OSL memory read/write interfaces to 64 bits
This change expands acpi_os_read_memory and acpi_os_write_memory to a
full 64 bits. This allows 64 bit transfers via the acpi_read and
acpi_write interfaces. Note: The internal acpi_hw_read and acpi_hw_write
interfaces remain at 32 bits, because 64 bits is not needed to
access the standard ACPI registers.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/acpica/hwxface.c b/drivers/acpi/acpica/hwxface.c
index bb8dba6..a716fed 100644
--- a/drivers/acpi/acpica/hwxface.c
+++ b/drivers/acpi/acpica/hwxface.c
@@ -138,11 +138,6 @@
return (status);
}
- width = reg->bit_width;
- if (width == 64) {
- width = 32; /* Break into two 32-bit transfers */
- }
-
/* Initialize entire 64-bit return value to zero */
*return_value = 0;
@@ -154,25 +149,18 @@
*/
if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
status = acpi_os_read_memory((acpi_physical_address)
- address, &value, width);
+ address, return_value,
+ reg->bit_width);
if (ACPI_FAILURE(status)) {
return (status);
}
- *return_value = value;
-
- if (reg->bit_width == 64) {
-
- /* Read the top 32 bits */
-
- status = acpi_os_read_memory((acpi_physical_address)
- (address + 4), &value, 32);
- if (ACPI_FAILURE(status)) {
- return (status);
- }
- *return_value |= ((u64)value << 32);
- }
} else { /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
+ width = reg->bit_width;
+ if (width == 64) {
+ width = 32; /* Break into two 32-bit transfers */
+ }
+
status = acpi_hw_read_port((acpi_io_address)
address, &value, width);
if (ACPI_FAILURE(status)) {
@@ -231,33 +219,23 @@
return (status);
}
- width = reg->bit_width;
- if (width == 64) {
- width = 32; /* Break into two 32-bit transfers */
- }
-
/*
* Two address spaces supported: Memory or IO. PCI_Config is
* not supported here because the GAS structure is insufficient
*/
if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
status = acpi_os_write_memory((acpi_physical_address)
- address, ACPI_LODWORD(value),
- width);
+ address, value, reg->bit_width);
if (ACPI_FAILURE(status)) {
return (status);
}
-
- if (reg->bit_width == 64) {
- status = acpi_os_write_memory((acpi_physical_address)
- (address + 4),
- ACPI_HIDWORD(value), 32);
- if (ACPI_FAILURE(status)) {
- return (status);
- }
- }
} else { /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
+ width = reg->bit_width;
+ if (width == 64) {
+ width = 32; /* Break into two 32-bit transfers */
+ }
+
status = acpi_hw_write_port((acpi_io_address)
address, ACPI_LODWORD(value),
width);