Patch set updated for coreboot: 699013f Winbond W83627HF: ACPI: Make `AddressMax` a multiple of `AddressAlignment`

[Paul Menzel]

Paul Menzel ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2942

-gerrit

commit 699013f1ae635e01ee4244070b4cc763134aea71
Author: Paul Menzel 
Date:   Thu Mar 28 14:59:34 2013 +0100

Winbond W83627HF: ACPI: Make `AddressMax` a multiple of `AddressAlignment`

When hooking the ASL into the DSDT of the ASRock E350M1, the build fails
    with the following error.

$ LANG=C make
    	[…]
    	    IASL       build/mainboard/asrock/e350m1/dsdt.ramstage.o

Intel ACPI Component Architecture
    	ASL Optimizing Compiler version 20121114-32 [Apr 22 2013]
    	Copyright (c) 2000 - 2012 Intel Corporation

dsdt.ramstage.asl   1779:    CreateByteField (Arg0, IRQ0._INT, IRQL)
    	Warning  1126 -              ResourceTag larger than Field ^  (Size mismatch, Tag: 16 bits, Field: 8 bits)

dsdt.ramstage.asl   1917:     IO (Decode16, 0x0100, 0x0FFC, 0x08, 0x08)
    	Error    4001 -                                         ^ Must be a multiple of alignment/granularity value

dsdt.ramstage.asl   2051:    CreateByteField (Arg0, IRQX._INT, IRQL)
    	Warning  1126 -              ResourceTag larger than Field ^  (Size mismatch, Tag: 16 bits, Field: 8 bits)

dsdt.ramstage.asl   2160:    CreateByteField (Arg0, IRQX._INT, IRQL)
    	Warning  1126 -              ResourceTag larger than Field ^  (Size mismatch, Tag: 16 bits, Field: 8 bits)

dsdt.ramstage.asl   2269:    CreateByteField (Arg0, IRQX._INT, IRQL)
    	Warning  1126 -              ResourceTag larger than Field ^  (Size mismatch, Tag: 16 bits, Field: 8 bits)

dsdt.ramstage.asl   2341:    CreateByteField (Arg0, IRQX._INT, IRQL)
    	Warning  1126 -              ResourceTag larger than Field ^  (Size mismatch, Tag: 16 bits, Field: 8 bits)

dsdt.ramstage.asl   2424:    CreateByteField (Arg0, IRQX._INT, IRQL)
    	Warning  1126 -              ResourceTag larger than Field ^  (Size mismatch, Tag: 16 bits, Field: 8 bits)

dsdt.ramstage.asl   2491:    CreateByteField (Arg0, IRQX._INT, IRQL)
    	Warning  1126 -              ResourceTag larger than Field ^  (Size mismatch, Tag: 16 bits, Field: 8 bits)

ASL Input:     dsdt.ramstage.asl - 2996 lines, 59383 bytes, 1610 keywords
    	Hex Dump:      dsdt.ramstage.hex - 160002 bytes

Compilation complete. 1 Errors, 7 Warnings, 0 Remarks, 553 Optimizations
    	make: *** [build/mainboard/asrock/e350m1/dsdt.ramstage.o] Error 255
    	[…]

According to the ACPI specification the maximum acceptable starting
    address `AddressMax` has to be a multiple of the alignment
    granularity for the I/O address. Citing ACPI specification 4.0a,
    page 612 [1].

18.5.56 IO (IO Resource Descriptor Macro)

### Syntax

IO (Decode, AddressMin, AddressMax, AddressAlignment, RangeLength, DescriptorName) => Buffer

### Argument

[…]

AddressMax evaluates to a 16-bit integer that specifies the
        maximum acceptable starting address for the I/O range. It must
        be an even multiple of AddressAlignment. The field
        DescriptorName._MAX is automatically created to refer to this
        portion of the resource descriptor.

Using address 0x0FF8, a multiple of 0x08, instead of 0x0FFC, fixes the
    error.

[1] http://acpi.info/DOWNLOADS/ACPIspec40a.pdf

Change-Id: I272e09d091149791f2867b1d06e4fc27bc1bb2cd
    Signed-off-by: Paul Menzel 
---
 src/superio/winbond/w83627hf/acpi/superio.asl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/superio/winbond/w83627hf/acpi/superio.asl b/src/superio/winbond/w83627hf/acpi/superio.asl
index ff95dfc..67cf67a 100644
--- a/src/superio/winbond/w83627hf/acpi/superio.asl
+++ b/src/superio/winbond/w83627hf/acpi/superio.asl
@@ -559,7 +559,7 @@ Device(SIO) {
    		/* Any configurable address (EPP mode) */
    		StartDependentFn (2,0)
    		{
-				IO (Decode16, 0x0100, 0x0FFC, 0x08, 0x08)
+				IO (Decode16, 0x0100, 0x0FF8, 0x08, 0x08)
    			IRQNoFlags () {3,4,5,7,9,10,11,12}
    		}
    		/* Any configurable address (No EPP mode) */