[src/trunk]: src/usr.sbin/acpitools/acpidump Add new function acpi_select_add...

[msaitoh <msaitoh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/edbeb50c1804
branches:  trunk
changeset: 355903:edbeb50c1804
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Mon Aug 21 02:58:49 2017 +0000

description:
Add new function acpi_select_address() derived from acpi_get_fadt_revision().
On some systems, 32bit address is used for (X)Dsdt even if (X)Facs uses 64bit.
Don't assume an address size from FADT revision.

diffstat:

 usr.sbin/acpitools/acpidump/acpi.c |  46 ++++++++++++++++++++++++-------------
 1 files changed, 30 insertions(+), 16 deletions(-)

diffs (95 lines):

diff -r 8d6389ee4a3f -r edbeb50c1804 usr.sbin/acpitools/acpidump/acpi.c
--- a/usr.sbin/acpitools/acpidump/acpi.c        Mon Aug 21 02:35:13 2017 +0000
+++ b/usr.sbin/acpitools/acpidump/acpi.c        Mon Aug 21 02:58:49 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: acpi.c,v 1.17 2017/08/18 09:49:24 msaitoh Exp $ */
+/* $NetBSD: acpi.c,v 1.18 2017/08/21 02:58:49 msaitoh Exp $ */
 
 /*-
  * Copyright (c) 1998 Doug Rabson
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: acpi.c,v 1.17 2017/08/18 09:49:24 msaitoh Exp $");
+__RCSID("$NetBSD: acpi.c,v 1.18 2017/08/21 02:58:49 msaitoh Exp $");
 
 #include <sys/param.h>
 #include <sys/endian.h>
@@ -67,6 +67,7 @@
                    void (*print_ins)(ACPI_WHEA_HEADER *),
                    void (*print_flags)(ACPI_WHEA_HEADER *));
 static int     acpi_get_fadt_revision(ACPI_TABLE_FADT *fadt);
+static uint64_t        acpi_select_address(uint32_t, uint64_t);
 static void    acpi_handle_fadt(ACPI_TABLE_HEADER *fadt);
 static void    acpi_print_cpu(u_char cpu_id);
 static void    acpi_print_cpu_uid(uint32_t uid, char *uid_string);
@@ -751,30 +752,45 @@
        return (fadt_revision);
 }
 
+static uint64_t
+acpi_select_address(uint32_t addr32, uint64_t addr64)
+{
+
+       if (addr64 == 0)
+               return addr32;
+
+       if ((addr32 != 0) && ((addr64 & 0xfffffff) != addr32)) {
+               /*
+                * A few systems (e.g., IBM T23) have an RSDP that claims
+                * revision 2 but the 64 bit addresses are invalid.  If
+                * revision 2 and the 32 bit address is non-zero but the
+                * 32 and 64 bit versions don't match, prefer the 32 bit
+                * version for all subsequent tables.
+                */
+               return addr32;
+       }
+
+       return addr64;
+}
+
 static void
 acpi_handle_fadt(ACPI_TABLE_HEADER *sdp)
 {
        ACPI_TABLE_HEADER *dsdp;
        ACPI_TABLE_FACS *facs;
        ACPI_TABLE_FADT *fadt;
-       int             fadt_revision;
 
        fadt = (ACPI_TABLE_FADT *)sdp;
        acpi_print_fadt(sdp);
 
-       fadt_revision = acpi_get_fadt_revision(fadt);
-       if (fadt_revision == 1)
-               facs = (ACPI_TABLE_FACS *)acpi_map_sdt(fadt->Facs);
-       else
-               facs = (ACPI_TABLE_FACS *)acpi_map_sdt(fadt->XFacs);
+       facs = (ACPI_TABLE_FACS *)acpi_map_sdt(
+               acpi_select_address(fadt->Facs, fadt->XFacs));
        if (memcmp(facs->Signature, ACPI_SIG_FACS, 4) != 0 || facs->Length < 64)
                errx(EXIT_FAILURE, "FACS is corrupt");
        acpi_print_facs(facs);
 
-       if (fadt_revision == 1)
-               dsdp = (ACPI_TABLE_HEADER *)acpi_map_sdt(fadt->Dsdt);
-       else
-               dsdp = (ACPI_TABLE_HEADER *)acpi_map_sdt(fadt->XDsdt);
+       dsdp = (ACPI_TABLE_HEADER *)acpi_map_sdt(
+               acpi_select_address(fadt->Dsdt, fadt->XDsdt));
        if (memcmp(dsdp->Signature, ACPI_SIG_DSDT, 4) != 0)
                errx(EXIT_FAILURE, "DSDT signature mismatch");
        if (acpi_checksum(dsdp, dsdp->Length))
@@ -3020,10 +3036,8 @@
        ACPI_TABLE_HEADER       *sdt;
 
        /* Use the DSDT address if it is version 1, otherwise use XDSDT. */
-       if (acpi_get_fadt_revision(fadt) == 1)
-               sdt = (ACPI_TABLE_HEADER *)acpi_map_sdt(fadt->Dsdt);
-       else
-               sdt = (ACPI_TABLE_HEADER *)acpi_map_sdt(fadt->XDsdt);
+       sdt = (ACPI_TABLE_HEADER *)acpi_map_sdt(
+               acpi_select_address(fadt->Dsdt, fadt->XDsdt));
        if (acpi_checksum(sdt, sdt->Length))
                errx(EXIT_FAILURE, "DSDT is corrupt");
        return (sdt);