Patch from Vincent Duvert (edited by myself): Implement reboot via ACPI (#4459)

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33135 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/drivers/ACPI.h

@@ -224,6 +224,7 @@ struct acpi_module_info {
 	status_t	(*prepare_sleep_state)(uint8 state, void (*wakeFunc)(void),
 					size_t size);
 	status_t	(*enter_sleep_state)(uint8 state);
+	status_t	(*reboot)(void);
 };
 
 

src/add-ons/kernel/bus_managers/acpi/acpi_busman.c

@@ -1,4 +1,5 @@
 /*
+ * Copyright 2009, Vincent Duvert, [email protected]
  * Copyright 2009, Clemens Zeidler, [email protected]
  * Copyright 2008, Axel Dörfler, [email protected].
  * Copyright 2006, Bryan Varner. All rights reserved.
@@ -533,6 +534,29 @@ enter_sleep_state(uint8 state)
 }
 
 
+static status_t
+reboot(void)
+{
+	ACPI_STATUS status;
+
+	TRACE("reboot\n");
+
+	if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER == 0)
+		return B_UNSUPPORTED;
+
+	status = AcpiHwLowLevelWrite(AcpiGbl_FADT.ResetRegister.BitWidth,
+		AcpiGbl_FADT.ResetValue, &AcpiGbl_FADT.ResetRegister);
+	
+	if (status != AE_OK) {
+		ERROR("Reset failed, status = %d\n", status);
+		return B_ERROR;
+	}
+	
+	snooze(1000000);
+	ERROR("Reset failed, timeout\n");	
+	return B_ERROR;
+}
+
 struct acpi_module_info gACPIModule = {
 	{
 		B_ACPI_MODULE_NAME,
@@ -566,5 +590,6 @@ struct acpi_module_info gACPIModule = {
 	evaluate_object,
 	evaluate_method,
 	prepare_sleep_state,
-	enter_sleep_state
+	enter_sleep_state,
+	reboot
 };

src/system/kernel/arch/x86/arch_cpu.cpp

@@ -103,7 +103,7 @@ x86_optimized_functions gOptimizedFunctions = {
 
 
 static status_t
-acpi_shutdown(void)
+acpi_shutdown(bool rebootSystem)
 {
 	if (debug_debugger_running())
 		return B_ERROR;
@@ -112,11 +112,16 @@ acpi_shutdown(void)
 	if (get_module(B_ACPI_MODULE_NAME, (module_info**)&acpi) != B_OK)
 		return B_NOT_SUPPORTED;
 
-	status_t status = acpi->prepare_sleep_state(ACPI_POWER_STATE_OFF, NULL, 0);
+	status_t status;
-	if (status == B_OK) {
+	if (rebootSystem) {
-		//cpu_status state = disable_interrupts();
+		status = acpi->reboot();
-		status = acpi->enter_sleep_state(ACPI_POWER_STATE_OFF);
+	} else {
-		//restore_interrupts(state);
+		status = acpi->prepare_sleep_state(ACPI_POWER_STATE_OFF, NULL, 0);
+		if (status == B_OK) {
+			//cpu_status state = disable_interrupts();
+			status = acpi->enter_sleep_state(ACPI_POWER_STATE_OFF);
+			//restore_interrupts(state);
+		}
 	}
 
 	put_module(B_ACPI_MODULE_NAME);
@@ -822,14 +827,12 @@ error:
 status_t
 arch_cpu_shutdown(bool rebootSystem)
 {
-	if (!rebootSystem) {
+	if (acpi_shutdown(rebootSystem) == B_OK)
-		status_t status = acpi_shutdown();
+		return B_OK;
-		if (status != B_OK)
+	
-			status = apm_shutdown();
+	if (!rebootSystem)
-
+		return apm_shutdown();
-		return status;
+	
-	}
-
 	cpu_status state = disable_interrupts();
 
 	// try to reset the system using the keyboard controller