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>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/acpi/acpica/hwregs.c b/drivers/acpi/acpica/hwregs.c
index 17a78e5ef175..6b6c83b87b52 100644
--- a/drivers/acpi/acpica/hwregs.c
+++ b/drivers/acpi/acpica/hwregs.c
@@ -157,6 +157,7 @@ acpi_hw_validate_register(struct acpi_generic_address *reg,
 acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
 {
         u64 address;
+        u64 value64;
         acpi_status status;
 
         ACPI_FUNCTION_NAME(hw_read);
@@ -178,7 +179,9 @@ acpi_status acpi_hw_read(u32 *value, struct acpi_generic_address *reg)
          */
         if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
                 status = acpi_os_read_memory((acpi_physical_address)
-                                             address, value, reg->bit_width);
+                                             address, &value64, reg->bit_width);
+
+                *value = (u32)value64;
         } else {                /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
 
                 status = acpi_hw_read_port((acpi_io_address)
@@ -228,7 +231,8 @@ acpi_status acpi_hw_write(u32 value, struct acpi_generic_address *reg)
          */
         if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
                 status = acpi_os_write_memory((acpi_physical_address)
-                                              address, value, reg->bit_width);
+                                              address, (u64)value,
+                                              reg->bit_width);
         } else {                /* ACPI_ADR_SPACE_SYSTEM_IO, validated earlier */
 
                 status = acpi_hw_write_port((acpi_io_address)