From 63a6daf68b606bb36888290e73f9eb568a9f9469 Mon Sep 17 00:00:00 2001
From: Nate Lawson <njl@FreeBSD.org>
Date: Tue, 30 Nov 2004 06:18:46 +0000
Subject: [PATCH] MFamd64:  Remove the cpu_reset_proxy cruft now that we run
 boot() on cpu 0.  Also, restructure cpu_reset to be cleaner (no functional
 change.)

---
 sys/i386/i386/vm_machdep.c | 78 ++++++--------------------------------
 1 file changed, 12 insertions(+), 66 deletions(-)

diff --git a/sys/i386/i386/vm_machdep.c b/sys/i386/i386/vm_machdep.c
index 2a97b9d38bd1..777d16007911 100644
--- a/sys/i386/i386/vm_machdep.c
+++ b/sys/i386/i386/vm_machdep.c
@@ -99,11 +99,6 @@ __FBSDID("$FreeBSD$");
 #endif
 
 static void	cpu_reset_real(void);
-#ifdef SMP
-static void	cpu_reset_proxy(void);
-static u_int	cpu_reset_proxyid;
-static volatile u_int	cpu_reset_proxy_active;
-#endif
 static void	sf_buf_init(void *arg);
 SYSINIT(sock_sf, SI_SUB_MBUF, SI_ORDER_ANY, sf_buf_init, NULL)
 
@@ -467,73 +462,24 @@ kvtop(void *addr)
 	return (pa);
 }
 
-/*
- * Force reset the processor by invalidating the entire address space!
- */
-
-#ifdef SMP
-static void
-cpu_reset_proxy()
-{
-
-	cpu_reset_proxy_active = 1;
-	while (cpu_reset_proxy_active == 1)
-		;	 /* Wait for other cpu to see that we've started */
-	stop_cpus((1<<cpu_reset_proxyid));
-	printf("cpu_reset_proxy: Stopped CPU %d\n", cpu_reset_proxyid);
-	DELAY(1000000);
-	cpu_reset_real();
-}
-#endif
-
 void
 cpu_reset()
 {
 #ifdef SMP
-	if (smp_active == 0) {
-		cpu_reset_real();
-		/* NOTREACHED */
-	} else {
-
-		u_int map;
-		int cnt;
-		printf("cpu_reset called on cpu#%d\n", PCPU_GET(cpuid));
-
-		map = PCPU_GET(other_cpus) & ~ stopped_cpus;
+	u_int map;
+	int cnt;
 
+	if (smp_active) {
+		map = PCPU_GET(other_cpus) & ~stopped_cpus;
 		if (map != 0) {
 			printf("cpu_reset: Stopping other CPUs\n");
-			stop_cpus(map);		/* Stop all other CPUs */
-		}
-
-		if (PCPU_GET(cpuid) == 0) {
-			DELAY(1000000);
-			cpu_reset_real();
-			/* NOTREACHED */
-		} else {
-			/* We are not BSP (CPU #0) */
-
-			cpu_reset_proxyid = PCPU_GET(cpuid);
-			cpustop_restartfunc = cpu_reset_proxy;
-			cpu_reset_proxy_active = 0;
-			printf("cpu_reset: Restarting BSP\n");
-			started_cpus = (1<<0);		/* Restart CPU #0 */
-
-			cnt = 0;
-			while (cpu_reset_proxy_active == 0 && cnt < 10000000)
-				cnt++;	/* Wait for BSP to announce restart */
-			if (cpu_reset_proxy_active == 0)
-				printf("cpu_reset: Failed to restart BSP\n");
-			enable_intr();
-			cpu_reset_proxy_active = 2;
-
-			while (1);
-			/* NOTREACHED */
+			stop_cpus(map);
 		}
+		DELAY(1000000);
 	}
-#else
-	cpu_reset_real();
 #endif
+	cpu_reset_real();
+	/* NOTREACHED */
 }
 
 static void
@@ -562,20 +508,20 @@ cpu_reset_real()
 	}
 	outb(0xf0, 0x00);		/* Reset. */
 #else
+#if !defined(BROKEN_KEYBOARD_RESET)
 	/*
 	 * Attempt to do a CPU reset via the keyboard controller,
-	 * do not turn of the GateA20, as any machine that fails
+	 * do not turn off GateA20, as any machine that fails
 	 * to do the reset here would then end up in no man's land.
 	 */
-
-#if !defined(BROKEN_KEYBOARD_RESET)
 	outb(IO_KBD + 4, 0xFE);
 	DELAY(500000);	/* wait 0.5 sec to see if that did it */
 	printf("Keyboard reset did not work, attempting CPU shutdown\n");
 	DELAY(1000000);	/* wait 1 sec for printf to complete */
 #endif
 #endif /* PC98 */
-	/* force a shutdown by unmapping entire address space ! */
+
+	/* Force a shutdown by unmapping entire address space. */
 	bzero((caddr_t)PTD, NBPTD);
 
 	/* "good night, sweet prince .... <THUNK!>" */