RE: AE_AML_BUFFER_LIMIT with handmade dsdt file

RE: AE_AML_BUFFER_LIMIT with handmade dsdt file

[Moore, Robert]

The problem is that when you remove the ResourceIndex bytes, you shrink
the size of the resulting template buffer. This breaks any ASL code that
has hardcoded offsets into the buffer, and may cause these offsets to
run off the end of the buffer, causing the BUFFER_LIMIT exception.

I can send you the new compiler if you want it.
Bob


> -----Original Message-----
> From: Thomas Meyer [mailto:thomas.mey-S0/GAf8tV78@public.gmane.org]
> Sent: Wednesday, November 16, 2005 1:57 PM
> To: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org; Moore, Robert
> Subject: RE: [ACPI] AE_AML_BUFFER_LIMIT with handmade dsdt file
> 
> 
> 
> I'm using
> *  sys-power/iasl
>       Latest version available: 20050513
>       Latest version installed: 20050513
>       Size of downloaded files: 686 kB
>       Homepage:    http://www.intel.com/technology/iapc/acpi/
>       Description: Intel ACPI Source Language (ASL) compiler
>       License:     iASL
> 
> The change, that you describes, was exactly the problem i had while
> compiling, so i removed all "optional"(?) (in the spec they call it
> "nothing") parameters, so the ResourceIndex byte, too (were all set to
> 0x00, in functions WordBusNumber, DWordIO, DWordMemory).
> 
> [snip]
>             Name (CRES, ResourceTemplate ()
> [snip]
>             Method (_CRS, 0, NotSerialized)
>             {
>                 CreateDWordField (CRES, 0x0182, TCMN)
>                 CreateDWordField (CRES, 0x0186, TCMX)
> [snip]
> 
> Thanks & regards
> Thomas
> 
> 
> "Moore, Robert" <robert.moore-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> schrieb am 16.11.05 22:33:14:
> 
> What version of iASL did you use to disassemble the original DSDT and
> recompile it?
> 
> We made a recent change to ensure that a disassemble/recompile
sequence
> works correctly for resource descriptors:
> 
> 21 October 2005. Summary of changes for version 20051021:
> 
> Relaxed a compiler restriction that disallowed a ResourceIndex byte if
> the corresponding ResourceSource string was not also present in a
> resource descriptor declaration. This restriction caused problems with
> existing AML/ASL code that includes the Index byte without the string.
> When such AML was disassembled, it could not be compiled without
> modification. Further, the modified code created a resource template
> with a different size than the original, breaking code that used fixed
> offsets into the resource template buffer.
> 
> 
> > -----Original Message-----
> > From: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org [mailto:acpi-devel-
> > admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org] On Behalf Of Thomas Meyer
> > Sent: Wednesday, November 16, 2005 1:28 PM
> > To: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> > Subject: [ACPI] AE_AML_BUFFER_LIMIT with handmade dsdt file
> >
> >
> > Hi.
> >
> > On one window the acpi spec on the other window the dsdl.dsl file, i
> > *thoughed* i fixed my dsdt file but now i get this errors:
> >
> > [17179570.604000]     ACPI-0508: *** Error: Method execution failed
> > [\_SB_.PCI0._CRS] (Node ebec4b00), AE_AML_BUFFER_LIMIT
> > [17179570.604000]     ACPI-0156: *** Error: Method execution failed
> > [\_SB_.PCI0._CRS] (Node ebec4b00), AE_AML_BUFFER_LIMIT
> >
> > the method _CRS for the given object is a larger one in the dsdt
file.
> is
> > this some kind of violation of the maximum buffer length (code
length
> in
> > AML?) or something like that?
> >
> > should i care about this error?
> >
> > Thanks & regards
> > Thomas
> >
> > dmesg:
> >
> > "
> > [17179569.184000] Linux version 2.6.15-rc1-g0db169f9
> (thomas@hotzenplotz)
> > (gcc-Version 3.4.4 (Gentoo Hardened 3.4.4-r1, ssp-3.4.4-1.0,
> pie-8.7.8))
> > #69 Wed Nov 16 21:41:01 CET 2005
> > [17179569.184000] BIOS-provided physical RAM map:
> > [17179569.184000]  BIOS-e820: 0000000000000000 - 000000000009f800
> (usable)
> > [17179569.184000]  BIOS-e820: 000000000009f800 - 00000000000a0000
> > (reserved)
> > [17179569.184000]  BIOS-e820: 00000000000d8000 - 0000000000100000
> > (reserved)
> > [17179569.184000]  BIOS-e820: 0000000000100000 - 000000002bef0000
> (usable)
> > [17179569.184000]  BIOS-e820: 000000002bef0000 - 000000002befb000
> (ACPI
> > data)
> > [17179569.184000]  BIOS-e820: 000000002befb000 - 000000002bf00000
> (ACPI
> > NVS)
> > [17179569.184000]  BIOS-e820: 000000002bf00000 - 0000000030000000
> > (reserved)
> > [17179569.184000]  BIOS-e820: 00000000fffe0000 - 0000000100000000
> > (reserved)
> > [17179569.184000] 702MB LOWMEM available.
> > [17179569.184000] On node 0 totalpages: 179952
> > [17179569.184000]   DMA zone: 4096 pages, LIFO batch:2
> > [17179569.184000]   DMA32 zone: 0 pages, LIFO batch:2
> > [17179569.184000]   Normal zone: 175856 pages, LIFO batch:64
> > [17179569.184000]   HighMem zone: 0 pages, LIFO batch:2
> > [17179569.184000] DMI 2.3 present.
> > [17179569.184000] ACPI: RSDP (v000 PTLTD
> )
> > @ 0x000f6890
> > [17179569.184000] ACPI: RSDT (v001 PTLTD    RSDT   0x06040000  LTP
> > 0x00000000) @ 0x2bef5b5f
> > [17179569.184000] ACPI: FADT (v001 KN400  PTLTW    0x06040000 PTL_
> > 0x000f4240) @ 0x2befae95
> > [17179569.184000] ACPI: SSDT (v001 PTLTD  POWERNOW 0x06040000  LTP
> > 0x00000001) @ 0x2befaf09
> > [17179569.184000] ACPI: DSDT (v001  VIA   PTL_ACPI 0x06040000 MSFT
> > 0x0100000e) @ 0x00000000
> > [17179569.184000] ACPI: PM-Timer IO Port: 0x4008
> > [17179569.184000] Allocating PCI resources starting at 40000000
(gap:
> > 30000000:cffe0000)
> > [17179569.184000] Built 1 zonelists
> > [17179569.184000] Kernel command line: root=/dev/hda3
resume=/dev/hda4
> > log_buf_len=4M kstack=300
> > [17179569.184000] log_buf_len: 4194304
> > [17179569.184000] Local APIC disabled by BIOS -- you can enable it
> with
> > "lapic"
> > [17179569.184000] mapped APIC to ffffd000 (01985000)
> > [17179569.184000] Initializing CPU#0
> > [17179569.184000] PID hash table entries: 4096 (order: 12, 65536
> bytes)
> > [17179569.184000] Detected 796.218 MHz processor.
> > [17179569.184000] Using pmtmr for high-res timesource
> > [17179569.184000] Console: colour VGA+ 80x25
> > [17179570.432000] Dentry cache hash table entries: 131072 (order: 7,
> > 524288 bytes)
> > [17179570.432000] Inode-cache hash table entries: 65536 (order: 6,
> 262144
> > bytes)
> > [17179570.472000] Memory: 705808k/719808k available (1879k kernel
> code,
> > 13476k reserved, 589k data, 184k init, 0k highmem)
> > [17179570.472000] Checking if this processor honours the WP bit even
> in
> > supervisor mode... Ok.
> > [17179570.552000] Calibrating delay using timer specific routine..
> 1594.34
> > BogoMIPS (lpj=3188696)
> > [17179570.552000] Mount-cache hash table entries: 512
> > [17179570.552000] CPU: After generic identify, caps: 0383f9ff
c1cbf9ff
> > 00000000 00000000 00000000 00000000 00000000
> > [17179570.552000] CPU: After vendor identify, caps: 0383f9ff
c1cbf9ff
> > 00000000 00000000 00000000 00000000 00000000
> > [17179570.552000] CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K
> (64
> > bytes/line)
> > [17179570.552000] CPU: L2 Cache: 512K (64 bytes/line)
> > [17179570.552000] CPU: After all inits, caps: 0383f9ff c1cbf9ff
> 00000000
> > 00000020 00000000 00000000 00000000
> > [17179570.552000] Intel machine check architecture supported.
> > [17179570.552000] Intel machine check reporting enabled on CPU#0.
> > [17179570.552000] mtrr: v2.0 (20020519)
> > [17179570.552000] CPU: AMD Mobile AMD Athlon(tm) XP 2400+ stepping
00
> > [17179570.552000] Enabling fast FPU save and restore... done.
> > [17179570.552000] Enabling unmasked SIMD FPU exception support...
> done.
> > [17179570.552000] Checking 'hlt' instruction... OK.
> > [17179570.568000]     ACPI-0284: *** Info: Table [DSDT] replaced by
> host
> > OS
> > [17179570.588000] ACPI: setting ELCR to 0400 (from 0a30)
> > [17179570.592000] NET: Registered protocol family 16
> > [17179570.592000] ACPI: bus type pci registered
> > [17179570.592000] PCI: PCI BIOS revision 2.10 entry at 0xfd65c, last
> bus=1
> > [17179570.592000] PCI: Using configuration type 1
> >
> > [interessting part begins here!]
> > [17179570.592000] ACPI: Subsystem revision 20050902
> > [17179570.600000] ACPI: Interpreter enabled
> > [17179570.600000] ACPI: Using PIC for interrupt routing
> > [17179570.604000] ACPI: PCI Root Bridge [PCI0] (0000:00)
> > [17179570.604000] PCI: Probing PCI hardware (bus 00)
> >
> > [17179570.604000]     ACPI-0508: *** Error: Method execution failed
> > [\_SB_.PCI0._CRS] (Node ebec4b00), AE_AML_BUFFER_LIMIT
> > [17179570.604000]     ACPI-0156: *** Error: Method execution failed
> > [\_SB_.PCI0._CRS] (Node ebec4b00), AE_AML_BUFFER_LIMIT
> >
> > [17179570.608000] PCI quirk: region 4000-407f claimed by vt8235 PM
> > [17179570.608000] PCI quirk: region 8100-810f claimed by vt8235 SMB
> > [17179570.612000] Boot video device is 0000:01:00.0
> > [17179570.612000] ACPI: PCI Interrupt Routing Table
[\_SB_.PCI0._PRT]
> > [17179570.624000] ACPI: PCI Interrupt Link [LNKA] (IRQs *4)
> > [17179570.624000] ACPI: PCI Interrupt Link [LNKB] (IRQs *5)
> > [17179570.624000] ACPI: PCI Interrupt Link [LNKC] (IRQs *9)
> > [17179570.624000] ACPI: PCI Interrupt Link [LNKD] (IRQs *11)
> > [17179570.632000] ACPI: Embedded Controller [EC0] (gpe 1)
> > [17179570.636000] Linux Plug and Play Support v0.97 (c) Adam Belay
> > [17179570.636000] pnp: PnP ACPI init
> > [17179570.644000] pnp: PnP ACPI: found 11 devices
> > [17179570.648000] PnPBIOS: Disabled by ACPI PNP
> > [17179570.648000] PCI: Using ACPI for IRQ routing
> > [17179570.648000] PCI: If a device doesn't work, try "pci=routeirq".
> If
> > it helps, post a report
> > [17179570.648000] pnp: 00:05: ioport range 0x4d0-0x4d1 has been
> reserved
> > [17179570.648000] pnp: 00:05: ioport range 0xfe10-0xfe11 has been
> reserved
> > [17179570.648000] pnp: 00:05: ioport range 0x600-0x60f has been
> reserved
> > [17179570.648000] pnp: 00:05: ioport range 0xfe00-0xfe00 has been
> reserved
> > [17179570.648000] pnp: 00:05: ioport range 0x4000-0x407f could not
be
> > reserved
> > [17179570.652000] PCI: Failed to allocate mem resource
> #6:10000@f4000000
> > for 0000:01:00.0
> > [17179570.652000] PCI: Bridge: 0000:00:01.0
> > [17179570.652000]   IO window: disabled.
> > [17179570.652000]   MEM window: d1000000-d1ffffff
> > [17179570.652000]   PREFETCH window: f0000000-f3ffffff
> > [17179570.652000] PCI: Bus 2, cardbus bridge: 0000:00:07.0
> > [17179570.652000]   IO window: 00002000-000020ff
> > [17179570.652000]   IO window: 00002400-000024ff
> > [17179570.652000]   PREFETCH window: 40000000-41ffffff
> > [17179570.652000]   MEM window: 42000000-43ffffff
> > [17179570.652000] PCI: Setting latency timer of device 0000:00:01.0
to
> 64
> > [17179570.652000] ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 5
> > [17179570.652000] PCI: setting IRQ 5 as level-triggered
> > [17179570.652000] ACPI: PCI Interrupt 0000:00:07.0[A] -> Link [LNKB]
> ->
> > GSI 5 (level, low) -> IRQ 5
> > [17179570.652000] PCI: Setting latency timer of device 0000:00:07.0
to
> 64
> > [17179570.652000] Machine check exception polling timer started.
> > [17179570.652000] VFS: Disk quotas dquot_6.5.1
> > [17179570.652000] Dquot-cache hash table entries: 1024 (order 0,
4096
> > bytes)
> > [17179570.652000] Initializing Cryptographic API
> > [17179570.652000] io scheduler noop registered
> > [17179570.652000] io scheduler anticipatory registered
> > [17179570.656000] isapnp: Scanning for PnP cards...
> >
> > ______________________________________________________________
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> >
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> 
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No back ptr to Op: type 8

[Rathgeb Markus]

i used the
ASL Optimizing Compiler version 20051102 [Nov 17 2005]
after decompiling i insert the line:
     External (\_PR.CPU0._PPC)
an compile it again

my question:
what means the line: No back ptr to Op: type 8


=======================================================================

./iasl -tc org_de.dsl

Intel ACPI Component Architecture
ASL Optimizing Compiler version 20051102 [Nov 17 2005]
Copyright (C) 2000 - 2005 Intel Corporation
Supports ACPI Specification Revision 3.0

No back ptr to Op: type 8
No back ptr to Op: type 8
No back ptr to Op: type 8
org_de.dsl   253:             Store (Zero, \_PR.CPU0._PPC)
Error    1061 -                   Object does not exist ^  (\_PR.CPU0._PPC)

org_de.dsl  2215:                                 Store (Zero, 
\_PR.CPU0._PPC)
Error    1061 -                                       Object does not 
exist ^  (\_PR.CPU0._PPC)

org_de.dsl  2220:                                 Store (0x02, 
\_PR.CPU0._PPC)
Error    1061 -                                       Object does not 
exist ^  (\_PR.CPU0._PPC)

org_de.dsl  3168:                             Store (Zero, \_PR.CPU0._PPC)
Error    1061 -                                   Object does not exist 
^  (\_PR.CPU0._PPC)

org_de.dsl  3173:                             Store (0x02, \_PR.CPU0._PPC)
Error    1061 -                                   Object does not exist 
^  (\_PR.CPU0._PPC)

org_de.dsl  3528:                         Store (Zero, \_PR.CPU0._PPC)
Error    1061 -                               Object does not exist ^ 
(\_PR.CPU0._PPC)

org_de.dsl  3535:                         Store (0x02, \_PR.CPU0._PPC)
Error    1061 -                               Object does not exist ^ 
(\_PR.CPU0._PPC)

org_de.dsl  3737:                     Store (0x02, \_PR.CPU0._PPC)
Error    1061 -                           Object does not exist ^ 
(\_PR.CPU0._PPC)

org_de.dsl  3747:                         Store (Zero, \_PR.CPU0._PPC)
Error    1061 -                               Object does not exist ^ 
(\_PR.CPU0._PPC)

org_de.dsl  3752:                         Store (0x02, \_PR.CPU0._PPC)
Error    1061 -                               Object does not exist ^ 
(\_PR.CPU0._PPC)

ASL Input:  org_de.dsl - 3762 lines, 129845 bytes, 1649 keywords
Compilation complete. 10 Errors, 0 Warnings, 0 Remarks, 2 Optimizations

=======================================================================

scite org_de.dsl
....

=======================================================================

  ./iasl -tc org_de.dsl

Intel ACPI Component Architecture
ASL Optimizing Compiler version 20051102 [Nov 17 2005]
Copyright (C) 2000 - 2005 Intel Corporation
Supports ACPI Specification Revision 3.0

No back ptr to Op: type 8
No back ptr to Op: type 8
No back ptr to Op: type 8
ASL Input:  org_de.dsl - 3763 lines, 129875 bytes, 1649 keywords
AML Output: DSDT.aml - 14936 bytes 463 named objects 1186 executable opcodes

Compilation complete. 0 Errors, 0 Warnings, 0 Remarks, 2 Optimizations



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