MIPS: Netlogic: Move code common with XLP to common/

- Move code that can be shared with XLP (irq.c, smp.c, time.c and
  xlr_console.c) to arch/mips/netlogic/common
- Add asm/netlogic/haldefs.h and asm/netlogic/common.h for common and
  io functions shared with XLP
- remove type 'nlm_reg_t *' and use uint64_t for mmio offsets
- Move XLR specific code in smp.c to xlr/wakeup.c
- Move XLR specific PCI code from irq.c to mips/pci/pci-xlr.c
- Provide API for pic functions called from common/irq.c

Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2964/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 188 insertions, 0 deletions

diff --git a/arch/mips/netlogic/common/smp.c b/arch/mips/netlogic/common/smp.c
new file mode 100644
index 000000000000..3b32c834d14c
--- /dev/null
+++ b/arch/mips/netlogic/common/smp.c
@@ -0,0 +1,188 @@
+/*
+ * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
+ * reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the NetLogic
+ * license below:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/irq.h>
+
+#include <asm/mmu_context.h>
+
+#include <asm/netlogic/interrupt.h>
+#include <asm/netlogic/mips-extns.h>
+#include <asm/netlogic/haldefs.h>
+#include <asm/netlogic/common.h>
+
+#include <asm/netlogic/xlr/iomap.h>
+#include <asm/netlogic/xlr/pic.h>
+
+void nlm_send_ipi_single(int logical_cpu, unsigned int action)
+{
+	int cpu = cpu_logical_map(logical_cpu);
+
+	if (action & SMP_CALL_FUNCTION)
+		nlm_pic_send_ipi(nlm_pic_base, cpu, IRQ_IPI_SMP_FUNCTION, 0);
+	if (action & SMP_RESCHEDULE_YOURSELF)
+		nlm_pic_send_ipi(nlm_pic_base, cpu, IRQ_IPI_SMP_RESCHEDULE, 0);
+}
+
+void nlm_send_ipi_mask(const struct cpumask *mask, unsigned int action)
+{
+	int cpu;
+
+	for_each_cpu(cpu, mask) {
+		nlm_send_ipi_single(cpu, action);
+	}
+}
+
+/* IRQ_IPI_SMP_FUNCTION Handler */
+void nlm_smp_function_ipi_handler(unsigned int irq, struct irq_desc *desc)
+{
+	smp_call_function_interrupt();
+	write_c0_eirr(1ull << irq);
+}
+
+/* IRQ_IPI_SMP_RESCHEDULE  handler */
+void nlm_smp_resched_ipi_handler(unsigned int irq, struct irq_desc *desc)
+{
+	scheduler_ipi();
+	write_c0_eirr(1ull << irq);
+}
+
+/*
+ * Called before going into mips code, early cpu init
+ */
+void nlm_early_init_secondary(int cpu)
+{
+	write_c0_ebase((uint32_t)nlm_common_ebase);
+#ifdef NLM_XLP
+	if (cpu % 4 == 0)
+		xlp_mmu_init();
+#endif
+}
+
+/*
+ * Code to run on secondary just after probing the CPU
+ */
+static void __cpuinit nlm_init_secondary(void)
+{
+	nlm_smp_irq_init();
+}
+
+void nlm_smp_finish(void)
+{
+#ifdef notyet
+	nlm_common_msgring_cpu_init();
+#endif
+	local_irq_enable();
+}
+
+void nlm_cpus_done(void)
+{
+}
+
+/*
+ * Boot all other cpus in the system, initialize them, and bring them into
+ * the boot function
+ */
+int nlm_cpu_unblock[NR_CPUS];
+int nlm_cpu_ready[NR_CPUS];
+unsigned long nlm_next_gp;
+unsigned long nlm_next_sp;
+cpumask_t phys_cpu_present_map;
+
+void nlm_boot_secondary(int logical_cpu, struct task_struct *idle)
+{
+	unsigned long gp = (unsigned long)task_thread_info(idle);
+	unsigned long sp = (unsigned long)__KSTK_TOS(idle);
+	int cpu = cpu_logical_map(logical_cpu);
+
+	nlm_next_sp = sp;
+	nlm_next_gp = gp;
+
+	/* barrier */
+	__sync();
+	nlm_cpu_unblock[cpu] = 1;
+}
+
+void __init nlm_smp_setup(void)
+{
+	unsigned int boot_cpu;
+	int num_cpus, i;
+
+	boot_cpu = hard_smp_processor_id();
+	cpus_clear(phys_cpu_present_map);
+
+	cpu_set(boot_cpu, phys_cpu_present_map);
+	__cpu_number_map[boot_cpu] = 0;
+	__cpu_logical_map[0] = boot_cpu;
+	cpu_set(0, cpu_possible_map);
+
+	num_cpus = 1;
+	for (i = 0; i < NR_CPUS; i++) {
+		/*
+		 * nlm_cpu_ready array is not set for the boot_cpu,
+		 * it is only set for ASPs (see smpboot.S)
+		 */
+		if (nlm_cpu_ready[i]) {
+			cpu_set(i, phys_cpu_present_map);
+			__cpu_number_map[i] = num_cpus;
+			__cpu_logical_map[num_cpus] = i;
+			cpu_set(num_cpus, cpu_possible_map);
+			++num_cpus;
+		}
+	}
+
+	pr_info("Phys CPU present map: %lx, possible map %lx\n",
+		(unsigned long)phys_cpu_present_map.bits[0],
+		(unsigned long)cpu_possible_map.bits[0]);
+
+	pr_info("Detected %i Slave CPU(s)\n", num_cpus);
+}
+
+void nlm_prepare_cpus(unsigned int max_cpus)
+{
+}
+
+struct plat_smp_ops nlm_smp_ops = {
+	.send_ipi_single	= nlm_send_ipi_single,
+	.send_ipi_mask		= nlm_send_ipi_mask,
+	.init_secondary		= nlm_init_secondary,
+	.smp_finish		= nlm_smp_finish,
+	.cpus_done		= nlm_cpus_done,
+	.boot_secondary		= nlm_boot_secondary,
+	.smp_setup		= nlm_smp_setup,
+	.prepare_cpus		= nlm_prepare_cpus,
+};