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Date: Wed, 31 Oct 2007 23:14:15 +0300
From: "Matvejchikov Ilya" <matvejchikov@gmail.com>
To: linuxppc-embedded@ozlabs.org, "Theo Gjaltema" <gjalt007@chello.nl>
Subject: Re: reboot of mpc8270 sometimes fails
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Hi!

I thik that m8260_restart in 2.4 kernel is broken. Try to get it from
the 2.6 kernel, or look at this.

 /* The 8260 has an internal 1-second timer update register that
@@ -112,21 +123,16 @@ m8260_get_rtc_time(void)
 static void
 m8260_restart(char *cmd)
 {
-	extern void m8260_gorom(bd_t *bi, uint addr);
-	uint	startaddr;
-
-	/* Most boot roms have a warmstart as the second instruction
-	 * of the reset vector.  If that doesn't work for you, change this
-	 * or the reboot program to send a proper address.
-	 */
-	startaddr = 0xff000104;
-
-	if (cmd != NULL) {
-		if (!strncmp(cmd, "startaddr=", 10))
-			startaddr = simple_strtoul(&cmd[10], NULL, 0);
-	}
-
-	m8260_gorom((unsigned int)__pa(__res), startaddr);
+	__volatile__ unsigned char dummy;
+	
+	local_irq_disable();
+	((cpm2_map_t *) cpm2_immr)->im_clkrst.car_rmr |= 0x00000001;
+
+	/* Clear the ME,EE,IR & DR bits in MSR to cause checkstop */
+	mtmsr(mfmsr() & ~(MSR_ME | MSR_EE | MSR_IR | MSR_DR));
+	dummy = ((cpm2_map_t *) cpm2_immr)->im_clkrst.res[0];
+	printk("Restart failed\n");
+	while (1) ;
 }