[Qemu-devel] [PATCH] Implement ACPI specs 3.0, 4.7.2.5

[Michael Hanselmann <qemu@hansmi.ch>]

The patch below implements ACPI_ENABLE and ACPI_DISABLE as described in
section 4.7.2.5 of the ACPI 3.0 specs.

Signed-off-by: Michael Hanselmann <qemu@hansmi.ch>

Greets,
Michael

---
Index: hw/acpi.c
===================================================================
RCS file: /sources/qemu/qemu/hw/acpi.c,v
retrieving revision 1.12
diff -u -b -B -r1.12 acpi.c
--- hw/acpi.c	28 May 2007 21:01:02 -0000	1.12
+++ hw/acpi.c	26 Jun 2007 20:29:19 -0000
@@ -54,6 +54,9 @@
 
 #define SUS_EN (1 << 13)
 
+#define ACPI_ENABLE 0xf1
+#define ACPI_DISABLE 0xf0
+
 #define SMBHSTSTS 0x00
 #define SMBHSTCNT 0x02
 #define SMBHSTCMD 0x03
@@ -216,6 +219,14 @@
 #endif
     if (addr == 0) {
         s->apmc = val;
+
+        /* ACPI specs 3.0, 4.7.2.5 */
+        if (val == ACPI_ENABLE) {
+            s->pmcntrl |= SCI_EN;
+        } else if (val == ACPI_DISABLE) {
+            s->pmcntrl &= ~SCI_EN;
+        }
+
         if (s->dev.config[0x5b] & (1 << 1)) {
             cpu_interrupt(first_cpu, CPU_INTERRUPT_SMI);
         }