zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/arch/arm/mach-omap2/omap-smp.c b/ap/os/linux/linux-3.4.x/arch/arm/mach-omap2/omap-smp.c
new file mode 100644
index 0000000..81ca676
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/arch/arm/mach-omap2/omap-smp.c
@@ -0,0 +1,183 @@
+/*
+ * OMAP4 SMP source file. It contains platform specific fucntions
+ * needed for the linux smp kernel.
+ *
+ * Copyright (C) 2009 Texas Instruments, Inc.
+ *
+ * Author:
+ * Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * Platform file needed for the OMAP4 SMP. This file is based on arm
+ * realview smp platform.
+ * * Copyright (c) 2002 ARM Limited.
+ *
+ * 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/device.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+
+#include <asm/cacheflush.h>
+#include <asm/hardware/gic.h>
+#include <asm/smp_scu.h>
+
+#include <mach/hardware.h>
+#include <mach/omap-secure.h>
+
+#include "iomap.h"
+#include "common.h"
+#include "clockdomain.h"
+
+/* SCU base address */
+static void __iomem *scu_base;
+
+static DEFINE_RAW_SPINLOCK(boot_lock);
+
+void __iomem *omap4_get_scu_base(void)
+{
+ return scu_base;
+}
+
+void __cpuinit platform_secondary_init(unsigned int cpu)
+{
+ /*
+ * Configure ACTRL and enable NS SMP bit access on CPU1 on HS device.
+ * OMAP44XX EMU/HS devices - CPU0 SMP bit access is enabled in PPA
+ * init and for CPU1, a secure PPA API provided. CPU0 must be ON
+ * while executing NS_SMP API on CPU1 and PPA version must be 1.4.0+.
+ * OMAP443X GP devices- SMP bit isn't accessible.
+ * OMAP446X GP devices - SMP bit access is enabled on both CPUs.
+ */
+ if (cpu_is_omap443x() && (omap_type() != OMAP2_DEVICE_TYPE_GP))
+ omap_secure_dispatcher(OMAP4_PPA_CPU_ACTRL_SMP_INDEX,
+ 4, 0, 0, 0, 0, 0);
+
+ /*
+ * 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
+ */
+ gic_secondary_init(0);
+
+ /*
+ * Synchronise with the boot thread.
+ */
+ raw_spin_lock(&boot_lock);
+ raw_spin_unlock(&boot_lock);
+}
+
+int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+ static struct clockdomain *cpu1_clkdm;
+ static bool booted;
+ /*
+ * Set synchronisation state between this boot processor
+ * and the secondary one
+ */
+ raw_spin_lock(&boot_lock);
+
+ /*
+ * Update the AuxCoreBoot0 with boot state for secondary core.
+ * omap_secondary_startup() routine will hold the secondary core till
+ * the AuxCoreBoot1 register is updated with cpu state
+ * A barrier is added to ensure that write buffer is drained
+ */
+ omap_modify_auxcoreboot0(0x200, 0xfffffdff);
+ flush_cache_all();
+ smp_wmb();
+
+ if (!cpu1_clkdm)
+ cpu1_clkdm = clkdm_lookup("mpu1_clkdm");
+
+ /*
+ * The SGI(Software Generated Interrupts) are not wakeup capable
+ * from low power states. This is known limitation on OMAP4 and
+ * needs to be worked around by using software forced clockdomain
+ * wake-up. To wakeup CPU1, CPU0 forces the CPU1 clockdomain to
+ * software force wakeup. The clockdomain is then put back to
+ * hardware supervised mode.
+ * More details can be found in OMAP4430 TRM - Version J
+ * Section :
+ * 4.3.4.2 Power States of CPU0 and CPU1
+ */
+ if (booted) {
+ clkdm_wakeup(cpu1_clkdm);
+ clkdm_allow_idle(cpu1_clkdm);
+ } else {
+ dsb_sev();
+ booted = true;
+ }
+
+ gic_raise_softirq(cpumask_of(cpu), 1);
+
+ /*
+ * Now the secondary core is starting up let it run its
+ * calibrations, then wait for it to finish
+ */
+ raw_spin_unlock(&boot_lock);
+
+ return 0;
+}
+
+static void __init wakeup_secondary(void)
+{
+ /*
+ * Write the address of secondary startup routine into the
+ * AuxCoreBoot1 where ROM code will jump and start executing
+ * on secondary core once out of WFE
+ * A barrier is added to ensure that write buffer is drained
+ */
+ omap_auxcoreboot_addr(virt_to_phys(omap_secondary_startup));
+ smp_wmb();
+
+ /*
+ * Send a 'sev' to wake the secondary core from WFE.
+ * Drain the outstanding writes to memory
+ */
+ dsb_sev();
+ 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;
+
+ /*
+ * Currently we can't call ioremap here because
+ * SoC detection won't work until after init_early.
+ */
+ scu_base = OMAP2_L4_IO_ADDRESS(OMAP44XX_SCU_BASE);
+ BUG_ON(!scu_base);
+
+ ncores = scu_get_core_count(scu_base);
+
+ /* sanity check */
+ if (ncores > nr_cpu_ids) {
+ pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
+ ncores, nr_cpu_ids);
+ ncores = nr_cpu_ids;
+ }
+
+ for (i = 0; i < ncores; i++)
+ set_cpu_possible(i, true);
+
+ set_smp_cross_call(gic_raise_softirq);
+}
+
+void __init platform_smp_prepare_cpus(unsigned int max_cpus)
+{
+
+ /*
+ * Initialise the SCU and wake up the secondary core using
+ * wakeup_secondary().
+ */
+ scu_enable(scu_base);
+ wakeup_secondary();
+}