[PATCH] remove clustered_apic_mode from smpboot.c

This removes clustered_apic_mode from smpboot.c into subarch,
creating a headerfile "mach_wakecpu" for all the cpu wakeup stuff.
This is pretty much the last of clustered_apic_mode ... ;-)

arch/i386/kernel/smpboot.c

@@ -53,6 +53,7 @@
 #include "smpboot_hooks.h"
 
 #include <mach_apic.h>
+#include <mach_wakecpu.h>
 
 /* Set if we find a B stepping CPU */
 static int __initdata smp_b_stepping;
@@ -348,8 +349,7 @@ void __init smp_callin(void)
 	 * our local APIC.  We have to wait for the IPI or we'll
 	 * lock up on an APIC access.
 	 */
-	if (!clustered_apic_mode) 
-		while (!atomic_read(&init_deasserted));
+	wait_for_init_deassert(&init_deasserted);
 
 	/*
 	 * (This works even if the APIC is not enabled.)
@@ -398,12 +398,7 @@ void __init smp_callin(void)
 	 */
 
 	Dprintk("CALLIN, before setup_local_APIC().\n");
-	/*
-	 * Because we use NMIs rather than the INIT-STARTUP sequence to
-	 * bootstrap the CPUs, the APIC may be in a weird state. Kick it.
-	 */
-	if (clustered_apic_mode)
-		clear_local_APIC();
+	smp_callin_clear_local_apic();
 	setup_local_APIC();
 	map_cpu_to_logical_apicid();
 
@@ -555,7 +550,7 @@ void unmap_cpu_to_logical_apicid(int cpu)
 }
 
 #if APIC_DEBUG
-static inline void inquire_remote_apic(int apicid)
+static inline void __inquire_remote_apic(int apicid)
 {
 	int i, regs[] = { APIC_ID >> 4, APIC_LVR >> 4, APIC_SPIV >> 4 };
 	char *names[] = { "ID", "VERSION", "SPIV" };
@@ -650,6 +645,15 @@ wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip)
 	unsigned long send_status = 0, accept_status = 0;
 	int maxlvt, timeout, num_starts, j;
 
+	/*
+	 * Be paranoid about clearing APIC errors.
+	 */
+	if (APIC_INTEGRATED(apic_version[phys_apicid])) {
+		apic_read_around(APIC_SPIV);
+		apic_write(APIC_ESR, 0);
+		apic_read(APIC_ESR);
+	}
+
 	Dprintk("Asserting INIT.\n");
 
 	/*
@@ -819,11 +823,7 @@ static int __init do_boot_cpu(int apicid)
 
 	Dprintk("Setting warm reset code and vector.\n");
 
-	if (clustered_apic_mode) {
-		/* stash the current NMI vector, so we can put things back */
-		nmi_high = *((volatile unsigned short *) TRAMPOLINE_HIGH);
-		nmi_low = *((volatile unsigned short *) TRAMPOLINE_LOW);
-	} 
+	store_NMI_vector(&nmi_high, &nmi_low);
 
 	CMOS_WRITE(0xa, 0xf);
 	local_flush_tlb();
@@ -833,15 +833,6 @@ static int __init do_boot_cpu(int apicid)
 	*((volatile unsigned short *) TRAMPOLINE_LOW) = start_eip & 0xf;
 	Dprintk("3.\n");
 
-	/*
-	 * Be paranoid about clearing APIC errors.
-	 */
-	if (!clustered_apic_mode && APIC_INTEGRATED(apic_version[apicid])) {
-		apic_read_around(APIC_SPIV);
-		apic_write(APIC_ESR, 0);
-		apic_read(APIC_ESR);
-	}
-
 	/*
 	 * Starting actual IPI sequence...
 	 */
@@ -879,10 +870,7 @@ static int __init do_boot_cpu(int apicid)
 			else
 				/* trampoline code not run */
 				printk("Not responding.\n");
-#if APIC_DEBUG
-			if (!clustered_apic_mode)
 			inquire_remote_apic(apicid);
-#endif
 		}
 	}
 	if (boot_error) {
@@ -896,11 +884,6 @@ static int __init do_boot_cpu(int apicid)
 	/* mark "stuck" area as not stuck */
 	*((volatile unsigned long *)phys_to_virt(8192)) = 0;
 
-	if(clustered_apic_mode) {
-		printk("Restoring NMI vector\n");
-		*((volatile unsigned short *) TRAMPOLINE_HIGH) = nmi_high;
-		*((volatile unsigned short *) TRAMPOLINE_LOW) = nmi_low;
-	}
 	return boot_error;
 }
 

include/asm-i386/mach-default/mach_apic.h

@@ -78,8 +78,6 @@ static inline int mpc_apic_id(struct mpc_config_processor *m, int quad)
 	return (m->mpc_apicid);
 }
 
-#define WAKE_SECONDARY_VIA_INIT
-
 static inline void setup_portio_remap(void)
 {
 }

include/asm-i386/mach-default/mach_wakecpu.h

+#ifndef __ASM_MACH_WAKECPU_H
+#define __ASM_MACH_WAKECPU_H
+
+/* 
+ * This file copes with machines that wakeup secondary CPUs by the
+ * INIT, INIT, STARTUP sequence.
+ */
+
+#define WAKE_SECONDARY_VIA_INIT
+
+#define TRAMPOLINE_LOW phys_to_virt(0x467)
+#define TRAMPOLINE_HIGH phys_to_virt(0x469)
+
+#define boot_cpu_apicid boot_cpu_physical_apicid
+
+static inline void wait_for_init_deassert(atomic_t *deassert)
+{
+	while (!atomic_read(deassert));
+	return;
+}
+
+/* Nothing to do for most platforms, since cleared by the INIT cycle */
+static inline void smp_callin_clear_local_apic(void)
+{
+}
+
+static inline void store_NMI_vector(unsigned short *high, unsigned short *low)
+{
+}
+
+static inline void restore_NMI_vector(unsigned short *high, unsigned short *low)
+{
+}
+
+#if APIC_DEBUG
+ #define inquire_remote_apic(apicid) __inquire_remote_apic(apicid)
+#else
+ #define inquire_remote_apic(apicid) {}
+#endif
+
+#endif /* __ASM_MACH_WAKECPU_H */

include/asm-i386/mach-numaq/mach_apic.h

@@ -73,8 +73,6 @@ static inline int mpc_apic_id(struct mpc_config_processor *m, int quad)
 	return logical_apicid;
 }
 
-#define WAKE_SECONDARY_VIA_NMI
-
 static inline void setup_portio_remap(void)
 {
 	if (numnodes <= 1)

include/asm-i386/mach-numaq/mach_wakecpu.h

+#ifndef __ASM_MACH_WAKECPU_H
+#define __ASM_MACH_WAKECPU_H
+
+/* This file copes with machines that wakeup secondary CPUs by NMIs */
+
+#define WAKE_SECONDARY_VIA_NMI
+
+#define TRAMPOLINE_LOW phys_to_virt(0x8)
+#define TRAMPOLINE_HIGH phys_to_virt(0xa)
+
+#define boot_cpu_apicid boot_cpu_logical_apicid
+
+/* We don't do anything here because we use NMI's to boot instead */
+static inline void wait_for_init_deassert(atomic_t *deassert)
+{
+}
+
+/*
+ * Because we use NMIs rather than the INIT-STARTUP sequence to
+ * bootstrap the CPUs, the APIC may be in a weird state. Kick it.
+ */
+static inline void smp_callin_clear_local_apic(void)
+{
+	clear_local_APIC();
+}
+
+static inline void store_NMI_vector(unsigned short *high, unsigned short *low)
+{
+	printk("Storing NMI vector\n");
+	*high = *((volatile unsigned short *) TRAMPOLINE_HIGH);
+	*low = *((volatile unsigned short *) TRAMPOLINE_LOW);
+}
+
+static inline void restore_NMI_vector(unsigned short *high, unsigned short *low)
+{
+	printk("Restoring NMI vector\n");
+	*((volatile unsigned short *) TRAMPOLINE_HIGH) = *high;
+	*((volatile unsigned short *) TRAMPOLINE_LOW) = *low;
+}
+
+#define inquire_remote_apic(apicid) {}
+
+#endif /* __ASM_MACH_WAKECPU_H */

include/asm-i386/mach-summit/mach_apic.h

@@ -59,8 +59,6 @@ static inline unsigned long apicid_to_phys_cpu_present(int apicid)
 		return (1ul << apicid);
 }
 
-#define WAKE_SECONDARY_VIA_INIT
-
 static inline void setup_portio_remap(void)
 {
 }

include/asm-i386/smpboot.h

@@ -9,19 +9,4 @@
  #endif /* CONFIG_CLUSTERED_APIC */
 #endif 
  
-#ifdef CONFIG_CLUSTERED_APIC
- #define TRAMPOLINE_LOW phys_to_virt(0x8)
- #define TRAMPOLINE_HIGH phys_to_virt(0xa)
-#else /* !CONFIG_CLUSTERED_APIC */
- #define TRAMPOLINE_LOW phys_to_virt(0x467)
- #define TRAMPOLINE_HIGH phys_to_virt(0x469)
-#endif /* CONFIG_CLUSTERED_APIC */
-
-#ifdef CONFIG_CLUSTERED_APIC
- #define boot_cpu_apicid boot_cpu_logical_apicid
-#else /* !CONFIG_CLUSTERED_APIC */
- #define boot_cpu_apicid boot_cpu_physical_apicid
-#endif /* CONFIG_CLUSTERED_APIC */
-
-
 #endif