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From: Thiemo Seufer <ths@networkno.de>
Subject: [Qemu-devel] [PATCH] Halt/restart support for MIPS
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To: qemu-devel@nongnu.org

Hello All,

This adds halt/restart support via a magic page. There is no real
standard way to do this for MIPS systems, a patch for the MIPS Qemu
kernels to add this support was also proposed.


Thiemo


Index: qemu-work/target-mips/helper.c
===================================================================
--- qemu-work.orig/target-mips/helper.c	2006-02-21 16:45:41.000000000 +0000
+++ qemu-work/target-mips/helper.c	2006-02-21 16:46:37.000000000 +0000
@@ -103,6 +103,19 @@
         *prot = PAGE_READ | PAGE_WRITE;
     } else if (address < 0xC0000000UL) {
         /* kseg1 */
+#ifndef CONFIG_USER_ONLY
+	/* Check magic system control page. */
+	switch (address) {
+	case 0xBFBF0000: /* restart */
+		qemu_system_reset_request();
+		break;
+	case 0xBFBF0004: /* halt */
+		qemu_system_shutdown_request();
+		break;
+	default:
+		break;
+	}
+#endif
         /* XXX: check supervisor mode */
         *physical = address - 0xA0000000UL;
         *prot = PAGE_READ | PAGE_WRITE;