make acpiec _GLK aware

[Paul Irofti]

This is a preparation diff making acpiec(4) global lock aware.

Others will build on it when doing reads and writes.

Okay?

Index: acpiec.c
===================================================================
RCS file: /cvs/src/sys/dev/acpi/acpiec.c,v
retrieving revision 1.45
diff -u -p -r1.45 acpiec.c
--- acpiec.c    10 Mar 2012 21:27:07 -0000      1.45
+++ acpiec.c    12 Jul 2012 16:37:18 -0000
@@ -253,7 +253,8 @@ acpiec_match(struct device *parent, void
        struct acpi_softc       *acpisc = (struct acpi_softc *)parent;
 
        /* Check for early ECDT table attach */
-       if (ecdt && !memcmp(ecdt->hdr.signature, ECDT_SIG, sizeof(ECDT_SIG) - 
1))
+       if (ecdt && 
+           !memcmp(ecdt->hdr.signature, ECDT_SIG, sizeof(ECDT_SIG) - 1))
                return (1);
        if (acpisc->sc_ec)
                return (0);
@@ -267,6 +268,7 @@ acpiec_attach(struct device *parent, str
 {
        struct acpiec_softc     *sc = (struct acpiec_softc *)self;
        struct acpi_attach_args *aa = aux;
+       struct aml_value res;
 
        sc->sc_acpi = (struct acpi_softc *)parent;
        sc->sc_devnode = aa->aaa_node;
@@ -291,6 +293,13 @@ acpiec_attach(struct device *parent, str
        acpi_set_gpehandler(sc->sc_acpi, sc->sc_gpe, acpiec_gpehandler,
            sc, 1);
 #endif
+       
+       if (aml_evalname(sc->sc_acpi, sc->sc_devnode, "_GLK", 0, NULL, &res))
+               sc->sc_glk = 0;
+       if (res.type != AML_OBJTYPE_INTEGER)
+               sc->sc_glk = 0;
+       else
+               sc->sc_glk = res.v_integer ? 1 : 0;
 
        printf("\n");
 }
Index: acpidev.h
===================================================================
RCS file: /cvs/src/sys/dev/acpi/acpidev.h,v
retrieving revision 1.32
diff -u -p -r1.32 acpidev.h
--- acpidev.h   6 Aug 2010 21:12:27 -0000       1.32
+++ acpidev.h   12 Jul 2012 16:37:18 -0000
@@ -332,6 +332,7 @@ struct acpiec_softc {
        u_int32_t               sc_gpe;
        struct acpiec_event     sc_events[ACPIEC_MAX_EVENTS];
        int                     sc_gotsci;
+       char                    sc_glk;
 };
 
 void           acpibtn_disable_psw(void);