Merge tag 'multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM soc multiplatform enablement from Olof Johansson:
 "This is a pretty significant branch.  It's the introduction of the
  first multiplatform support on ARM, and with this (and the later
  branch) merged, it is now possible to build one kernel that contains
  support for highbank, vexpress, mvebu, socfpga, and picoxcell.  More
  platforms will be convered over in the next few releases.

  Two critical last things had to be done for this to be practical and
  possible:
   * Today each platform has its own include directory under
     mach-<mach>/include/mach/*, and traditionally that is where a lot
     of driver/platform shared definitions have gone, such as platform
     data structures.  They now need to move out to a common location
     instead, and this branch moves a large number of those out to
     include/linux/platform_data.
   * Each platform used to list the device trees to compile for its
     boards in mach-<mach>/Makefile.boot.

  Both of the above changes will mean that there are some merge
  conflicts to come (and some to resolve here).  It's a one-time move
  and once it settles in, we should be good for quite a while.  Sorry
  for the overhead."

Fix conflicts as per Olof.

* tag 'multiplatform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (51 commits)
  ARM: add v7 multi-platform defconfig
  ARM: msm: Move core.h contents into common.h
  ARM: highbank: call highbank_pm_init from .init_machine
  ARM: dtb: move all dtb targets to common Makefile
  ARM: spear: move platform_data definitions
  ARM: samsung: move platform_data definitions
  ARM: orion: move platform_data definitions
  ARM: vexpress: convert to multi-platform
  ARM: initial multiplatform support
  ARM: mvebu: move armada-370-xp.h in mach dir
  ARM: vexpress: remove dependency on mach/* headers
  ARM: picoxcell: remove dependency on mach/* headers
  ARM: move all dtb targets out of Makefile.boot
  ARM: picoxcell: move debug macros to include/debug
  ARM: socfpga: move debug macros to include/debug
  ARM: mvebu: move debug macros to include/debug
  ARM: vexpress: move debug macros to include/debug
  ARM: highbank: move debug macros to include/debug
  ARM: move debug macros to common location
  ARM: make mach/gpio.h headers optional
  ...

4 files changed, 77 insertions, 90 deletions

diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S
index c45522c..66f711b 100644
--- a/arch/arm/kernel/debug.S
+++ b/arch/arm/kernel/debug.S
@@ -20,90 +20,9 @@
  * references to these in a production kernel!
  */
 
-#if defined(CONFIG_DEBUG_ICEDCC)
-		@@ debug using ARM EmbeddedICE DCC channel
-
-		.macro	addruart, rp, rv, tmp
-		.endm
-
-#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
-
-		.macro	senduart, rd, rx
-		mcr	p14, 0, \rd, c0, c5, 0
-		.endm
-
-		.macro	busyuart, rd, rx
-1001:
-		mrc	p14, 0, \rx, c0, c1, 0
-		tst	\rx, #0x20000000
-		beq	1001b
-		.endm
-
-		.macro	waituart, rd, rx
-		mov	\rd, #0x2000000
-1001:
-		subs	\rd, \rd, #1
-		bmi	1002f
-		mrc	p14, 0, \rx, c0, c1, 0
-		tst	\rx, #0x20000000
-		bne	1001b
-1002:
-		.endm
-
-#elif defined(CONFIG_CPU_XSCALE)
-
-		.macro	senduart, rd, rx
-		mcr	p14, 0, \rd, c8, c0, 0
-		.endm
-
-		.macro	busyuart, rd, rx
-1001:
-		mrc	p14, 0, \rx, c14, c0, 0
-		tst	\rx, #0x10000000
-		beq	1001b
-		.endm
-
-		.macro	waituart, rd, rx
-		mov	\rd, #0x10000000
-1001:
-		subs	\rd, \rd, #1
-		bmi	1002f
-		mrc	p14, 0, \rx, c14, c0, 0
-		tst	\rx, #0x10000000
-		bne	1001b
-1002:
-		.endm
-
-#else
-
-		.macro	senduart, rd, rx
-		mcr	p14, 0, \rd, c1, c0, 0
-		.endm
-
-		.macro	busyuart, rd, rx
-1001:
-		mrc	p14, 0, \rx, c0, c0, 0
-		tst	\rx, #2
-		beq	1001b
-
-		.endm
-
-		.macro	waituart, rd, rx
-		mov	\rd, #0x2000000
-1001:
-		subs	\rd, \rd, #1
-		bmi	1002f
-		mrc	p14, 0, \rx, c0, c0, 0
-		tst	\rx, #2
-		bne	1001b
-1002:
-		.endm
-
-#endif	/* CONFIG_CPU_V6 */
-
-#elif !defined(CONFIG_DEBUG_SEMIHOSTING)
-#include <mach/debug-macro.S>
-#endif	/* CONFIG_DEBUG_ICEDCC */
+#if !defined(CONFIG_DEBUG_SEMIHOSTING)
+#include CONFIG_DEBUG_LL_INCLUDE
+#endif
 
 #ifdef CONFIG_MMU
 		.macro	addruart_current, rx, tmp1, tmp2
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 3db960e..9874d07 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -23,8 +23,8 @@
 #include <asm/thread_info.h>
 #include <asm/pgtable.h>
 
-#ifdef CONFIG_DEBUG_LL
-#include <mach/debug-macro.S>
+#if defined(CONFIG_DEBUG_LL) && !defined(CONFIG_DEBUG_SEMIHOSTING)
+#include CONFIG_DEBUG_LL_INCLUDE
 #endif
 
 /*
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index a81dcec..725f9f2 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -977,8 +977,10 @@ void __init setup_arch(char **cmdline_p)
 	unflatten_device_tree();
 
 #ifdef CONFIG_SMP
-	if (is_smp())
+	if (is_smp()) {
+		smp_set_ops(mdesc->smp);
 		smp_init_cpus();
+	}
 #endif
 	reserve_crashkernel();
 
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index ebd8ad2..aa4ffe6 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -19,7 +19,6 @@
 #include <linux/mm.h>
 #include <linux/err.h>
 #include <linux/cpu.h>
-#include <linux/smp.h>
 #include <linux/seq_file.h>
 #include <linux/irq.h>
 #include <linux/percpu.h>
@@ -27,6 +26,7 @@
 #include <linux/completion.h>
 
 #include <linux/atomic.h>
+#include <asm/smp.h>
 #include <asm/cacheflush.h>
 #include <asm/cpu.h>
 #include <asm/cputype.h>
@@ -42,6 +42,7 @@
 #include <asm/ptrace.h>
 #include <asm/localtimer.h>
 #include <asm/smp_plat.h>
+#include <asm/mach/arch.h>
 
 /*
  * as from 2.5, kernels no longer have an init_tasks structure
@@ -50,6 +51,12 @@
  */
 struct secondary_data secondary_data;
 
+/*
+ * control for which core is the next to come out of the secondary
+ * boot "holding pen"
+ */
+volatile int __cpuinitdata pen_release = -1;
+
 enum ipi_msg_type {
 	IPI_TIMER = 2,
 	IPI_RESCHEDULE,
@@ -60,6 +67,14 @@ enum ipi_msg_type {
 
 static DECLARE_COMPLETION(cpu_running);
 
+static struct smp_operations smp_ops;
+
+void __init smp_set_ops(struct smp_operations *ops)
+{
+	if (ops)
+		smp_ops = *ops;
+};
+
 int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
 {
 	int ret;
@@ -100,13 +115,64 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
 	return ret;
 }
 
+/* platform specific SMP operations */
+void __init smp_init_cpus(void)
+{
+	if (smp_ops.smp_init_cpus)
+		smp_ops.smp_init_cpus();
+}
+
+static void __init platform_smp_prepare_cpus(unsigned int max_cpus)
+{
+	if (smp_ops.smp_prepare_cpus)
+		smp_ops.smp_prepare_cpus(max_cpus);
+}
+
+static void __cpuinit platform_secondary_init(unsigned int cpu)
+{
+	if (smp_ops.smp_secondary_init)
+		smp_ops.smp_secondary_init(cpu);
+}
+
+int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+	if (smp_ops.smp_boot_secondary)
+		return smp_ops.smp_boot_secondary(cpu, idle);
+	return -ENOSYS;
+}
+
 #ifdef CONFIG_HOTPLUG_CPU
 static void percpu_timer_stop(void);
 
+static int platform_cpu_kill(unsigned int cpu)
+{
+	if (smp_ops.cpu_kill)
+		return smp_ops.cpu_kill(cpu);
+	return 1;
+}
+
+static void platform_cpu_die(unsigned int cpu)
+{
+	if (smp_ops.cpu_die)
+		smp_ops.cpu_die(cpu);
+}
+
+static int platform_cpu_disable(unsigned int cpu)
+{
+	if (smp_ops.cpu_disable)
+		return smp_ops.cpu_disable(cpu);
+
+	/*
+	 * By default, allow disabling all CPUs except the first one,
+	 * since this is special on a lot of platforms, e.g. because
+	 * of clock tick interrupts.
+	 */
+	return cpu == 0 ? -EPERM : 0;
+}
 /*
  * __cpu_disable runs on the processor to be shutdown.
  */
-int __cpu_disable(void)
+int __cpuinit __cpu_disable(void)
 {
 	unsigned int cpu = smp_processor_id();
 	int ret;
@@ -149,7 +215,7 @@ static DECLARE_COMPLETION(cpu_died);
  * called on the thread which is asking for a CPU to be shutdown -
  * waits until shutdown has completed, or it is timed out.
  */
-void __cpu_die(unsigned int cpu)
+void __cpuinit __cpu_die(unsigned int cpu)
 {
 	if (!wait_for_completion_timeout(&cpu_died, msecs_to_jiffies(5000))) {
 		pr_err("CPU%u: cpu didn't die\n", cpu);