[ARM] Remove Integrator/CP SMP platform support

The Integrator/CP SMP platform support was never fully merged, and now
it's causing build breakage.  Remove it.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-integrator/Makefile

@@ -12,4 +12,3 @@ obj-$(CONFIG_LEDS)			+= leds.o
 obj-$(CONFIG_PCI)			+= pci_v3.o pci.o
 obj-$(CONFIG_CPU_FREQ_INTEGRATOR)	+= cpu.o
 obj-$(CONFIG_INTEGRATOR_IMPD1)		+= impd1.o
-obj-$(CONFIG_SMP)			+= platsmp.o headsmp.o

arch/arm/mach-integrator/core.c

@@ -257,23 +257,7 @@ integrator_timer_interrupt(int irq, void *dev_id)
 	 */
 	writel(1, TIMER1_VA_BASE + TIMER_INTCLR);
 
-	/*
-	 * the clock tick routines are only processed on the
-	 * primary CPU
-	 */
-	if (hard_smp_processor_id() == 0) {
-		timer_tick();
-#ifdef CONFIG_SMP
-		smp_send_timer();
-#endif
-	}
-
-#ifdef CONFIG_SMP
-	/*
-	 * this is the ARM equivalent of the APIC timer interrupt
-	 */
-	update_process_times(user_mode(get_irq_regs()));
-#endif /* CONFIG_SMP */
+	timer_tick();
 
 	write_sequnlock(&xtime_lock);
 

arch/arm/mach-integrator/headsmp.S

-/*
- *  linux/arch/arm/mach-integrator/headsmp.S
- *
- *  Copyright (c) 2003 ARM Limited
- *  All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/linkage.h>
-#include <linux/init.h>
-
-	__INIT
-
-/*
- * Integrator specific entry point for secondary CPUs.  This provides
- * a "holding pen" into which all secondary cores are held until we're
- * ready for them to initialise.
- */
-ENTRY(integrator_secondary_startup)
-	adr	r4, 1f
-	ldmia	r4, {r5, r6}
-	sub	r4, r4, r5
-	ldr	r6, [r6, r4]
-pen:	ldr	r7, [r6]
-	cmp	r7, r0
-	bne	pen
-
-	/*
-	 * we've been released from the holding pen: secondary_stack
-	 * should now contain the SVC stack for this core
-	 */
-	b	secondary_startup
-
-1:	.long	.
-	.long	phys_pen_release

arch/arm/mach-integrator/platsmp.c

-/*
- *  linux/arch/arm/mach-cintegrator/platsmp.c
- *
- *  Copyright (C) 2002 ARM Ltd.
- *  All Rights Reserved
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/mm.h>
-
-#include <asm/atomic.h>
-#include <asm/cacheflush.h>
-#include <asm/delay.h>
-#include <asm/mmu_context.h>
-#include <asm/ptrace.h>
-#include <asm/smp.h>
-
-extern void integrator_secondary_startup(void);
-
-/*
- * control for which core is the next to come out of the secondary
- * boot "holding pen"
- */
-volatile int __cpuinitdata pen_release = -1;
-unsigned long __cpuinitdata phys_pen_release = 0;
-
-static DEFINE_SPINLOCK(boot_lock);
-
-void __cpuinit platform_secondary_init(unsigned int cpu)
-{
-	/*
-	 * the primary core may have used a "cross call" soft interrupt
-	 * to get this processor out of WFI in the BootMonitor - make
-	 * sure that we are no longer being sent this soft interrupt
-	 */
-	smp_cross_call_done(cpumask_of_cpu(cpu));
-
-	/*
-	 * if any interrupts are already enabled for the primary
-	 * core (e.g. timer irq), then they will not have been enabled
-	 * for us: do so
-	 */
-	secondary_scan_irqs();
-
-	/*
-	 * let the primary processor know we're out of the
-	 * pen, then head off into the C entry point
-	 */
-	pen_release = -1;
-
-	/*
-	 * Synchronise with the boot thread.
-	 */
-	spin_lock(&boot_lock);
-	spin_unlock(&boot_lock);
-}
-
-int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
-{
-	unsigned long timeout;
-
-	/*
-	 * set synchronisation state between this boot processor
-	 * and the secondary one
-	 */
-	spin_lock(&boot_lock);
-
-	/*
-	 * The secondary processor is waiting to be released from
-	 * the holding pen - release it, then wait for it to flag
-	 * that it has been released by resetting pen_release.
-	 *
-	 * Note that "pen_release" is the hardware CPU ID, whereas
-	 * "cpu" is Linux's internal ID.
-	 */
-	pen_release = cpu;
-	flush_cache_all();
-
-	/*
-	 * XXX
-	 *
-	 * This is a later addition to the booting protocol: the
-	 * bootMonitor now puts secondary cores into WFI, so
-	 * poke_milo() no longer gets the cores moving; we need
-	 * to send a soft interrupt to wake the secondary core.
-	 * Use smp_cross_call() for this, since there's little
-	 * point duplicating the code here
-	 */
-	smp_cross_call(cpumask_of_cpu(cpu));
-
-	timeout = jiffies + (1 * HZ);
-	while (time_before(jiffies, timeout)) {
-		if (pen_release == -1)
-			break;
-
-		udelay(10);
-	}
-
-	/*
-	 * now the secondary core is starting up let it run its
-	 * calibrations, then wait for it to finish
-	 */
-	spin_unlock(&boot_lock);
-
-	return pen_release != -1 ? -ENOSYS : 0;
-}
-
-static void __init poke_milo(void)
-{
-	extern void secondary_startup(void);
-
-	/* nobody is to be released from the pen yet */
-	pen_release = -1;
-
-	phys_pen_release = virt_to_phys(&pen_release);
-
-	/*
-	 * write the address of secondary startup into the system-wide
-	 * flags register, then clear the bottom two bits, which is what
-	 * BootMonitor is waiting for
-	 */
-#if 1
-#define CINTEGRATOR_HDR_FLAGSS_OFFSET 0x30
-	__raw_writel(virt_to_phys(integrator_secondary_startup),
-		     (IO_ADDRESS(INTEGRATOR_HDR_BASE) +
-		      CINTEGRATOR_HDR_FLAGSS_OFFSET));
-#define CINTEGRATOR_HDR_FLAGSC_OFFSET 0x34
-	__raw_writel(3,
-		     (IO_ADDRESS(INTEGRATOR_HDR_BASE) +
-		      CINTEGRATOR_HDR_FLAGSC_OFFSET));
-#endif
-
-	mb();
-}
-
-/*
- * Initialise the CPU possible map early - this describes the CPUs
- * which may be present or become present in the system.
- */
-void __init smp_init_cpus(void)
-{
-	unsigned int i, ncores = get_core_count();
-
-	for (i = 0; i < ncores; i++)
-		cpu_set(i, cpu_possible_map);
-}
-
-void __init smp_prepare_cpus(unsigned int max_cpus)
-{
-	unsigned int ncores = get_core_count();
-	unsigned int cpu = smp_processor_id();
-	int i;
-
-	/* sanity check */
-	if (ncores == 0) {
-		printk(KERN_ERR
-		       "Integrator/CP: strange CM count of 0? Default to 1\n");
-
-		ncores = 1;
-	}
-
-	if (ncores > NR_CPUS) {
-		printk(KERN_WARNING
-		       "Integrator/CP: no. of cores (%d) greater than configured "
-		       "maximum of %d - clipping\n",
-		       ncores, NR_CPUS);
-		ncores = NR_CPUS;
-	}
-
-	/*
-	 * start with some more config for the Boot CPU, now that
-	 * the world is a bit more alive (which was not the case
-	 * when smp_prepare_boot_cpu() was called)
-	 */
-	smp_store_cpu_info(cpu);
-
-	/*
-	 * are we trying to boot more cores than exist?
-	 */
-	if (max_cpus > ncores)
-		max_cpus = ncores;
-
-	/*
-	 * Initialise the present map, which describes the set of CPUs
-	 * actually populated at the present time.
-	 */
-	for (i = 0; i < max_cpus; i++)
-		cpu_set(i, cpu_present_map);
-
-	/*
-	 * Do we need any more CPUs? If so, then let them know where
-	 * to start. Note that, on modern versions of MILO, the "poke"
-	 * doesn't actually do anything until each individual core is
-	 * sent a soft interrupt to get it out of WFI
-	 */
-	if (max_cpus > 1)
-		poke_milo();
-}

include/asm-arm/arch-integrator/smp.h

-#ifndef ASMARM_ARCH_SMP_H
-#define ASMARM_ARCH_SMP_H
-
-
-#include <asm/hardware.h>
-#include <asm/io.h>
-
-#define hard_smp_processor_id()				\
-	({						\
-		unsigned int cpunum;			\
-		__asm__("mrc p15, 0, %0, c0, c0, 5"	\
-			: "=r" (cpunum));		\
-		cpunum &= 0x0F;				\
-	})
-
-extern void secondary_scan_irqs(void);
-
-#endif