Add power button handler (and test SCI) for ACPI

sys/amd64/acpi_osl_hw.c

@@ -69,5 +69,5 @@ ACPI_STATUS AcpiOsWritePciConfiguration(ACPI_PCI_ID *PciId, UINT32 Reg, UINT64 V
 }
 
 UINT64 AcpiOsGetTimer(void) {
-    return 0;
+    return system_time;
 }

sys/amd64/acpi_osl_irq.c

@@ -5,12 +5,10 @@
 static ACPI_OSD_HANDLER sci_wrapped;
 
 uint32_t sci_wrapper(void *ctx) {
-    kdebug("!!! SCI WRAPPER !!!\n");
     return sci_wrapped(ctx);
 }
 
 ACPI_STATUS AcpiOsInstallInterruptHandler(UINT32 InterruptNumber, ACPI_OSD_HANDLER ServiceRoutine, void *Context) {
-    kwarn("ACPI ISR INSTALL STUB\n");
     sci_wrapped = ServiceRoutine;
     irq_add_leg_handler(InterruptNumber, sci_wrapper, Context);
     return AE_OK;

sys/amd64/hw/acpi.c

@@ -18,6 +18,11 @@ static uint8_t checksum(const void *ptr, size_t size) {
     return v;
 }
 
+static uint32_t acpi_power_button_handler(void *ctx) {
+    kinfo("Power button was pressed\n");
+    return 0;
+}
+
 static ACPI_STATUS acpica_init(void) {
     ACPI_STATUS ret;
     ACPI_OBJECT arg1;
@@ -67,6 +72,12 @@ static ACPI_STATUS acpica_init(void) {
         return ret;
     }
 
+    if (ACPI_FAILURE(ret = AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
+                                                        acpi_power_button_handler,
+                                                        NULL))) {
+        kwarn("Failed to install ACPI power button handler: %s\n", AcpiFormatException(ret));
+    }
+
     return AE_OK;
 }
 

sys/sched.c

@@ -153,6 +153,8 @@ void sched_debug_cycle(uint64_t delta_ms) {
     struct amd64_phys_stat phys_st;
     struct amd64_pool_stat pool_st;
 
+    return;
+
     kdebug("--- DEBUG_CYCLE ---\n");
 
     debugs(DEBUG_DEFAULT, "Process tree:\n");