From: Erik van der Kouwe <erik@minix3.org>
Date: Mon, 2 Aug 2010 14:40:26 +0000 (+0000)
Subject: Display fallback message in case poweroff fails (contributed by Feiran 'Fam' Zheng)
X-Git-Tag: v3.1.8~119
X-Git-Url: http://zhaoyanbai.com/repos/Bv9ARM.ch04.html?a=commitdiff_plain;h=ebec792700db0f155b7ef6ae3ef02791ff365841;p=minix.git

Display fallback message in case poweroff fails (contributed by Feiran 'Fam' Zheng)
---

diff --git a/kernel/arch/i386/klib16.S b/kernel/arch/i386/klib16.S
index 57c2ea2bf..eefd42160 100644
--- a/kernel/arch/i386/klib16.S
+++ b/kernel/arch/i386/klib16.S
@@ -54,18 +54,41 @@ gate_A20:
 	mov	$0x5301,%ax
 	mov	$0x0,%bx
 	int	0x15
+	jc	apm_err
 	
 	/* Enable power management */
 	mov	$0x5308,%ax
 	mov	$0x1,%bx
 	mov	$0x1,%cx
 	int	0x15
+	jc	apm_err
 	
 	/* Set power state to off */
 	mov	$0x5307,%ax
 	mov	$0x01,%bx
 	mov	$0x3,%cx
 	int	0x15
+	jc	apm_err
+0:	hlt
+	jmp	0b
+	
+poweroff_msg:
+.ascii	"You can poweroff the machine safely now"
+poweroff_msg_end:
+#define POWEROFF_MSG_LEN	(poweroff_msg_end-poweroff_msg)
+apm_err:
+	/* If APM can't perform the shutdown, print something to inform */
+	mov	$0x02, %ax	/* clear screen */
+	int	$0x10
+	
+	mov	$(BIOS_POWEROFF_ENTRY >> 4), %ax
+	mov	%ax, %es
+	mov	$0x1301, %ax
+	mov	$0x07, %bx
+	mov	$POWEROFF_MSG_LEN, %cx
+	mov	$0x0300, %dx
+	mov	$(poweroff_msg - _poweroff16), %bp
+	int	$0x10
 0:	hlt
 	jmp	0b