1 files changed, 0 insertions, 436 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/sysdev/xics/xics-common.c b/ANDROID_3.4.5/arch/powerpc/sysdev/xics/xics-common.c
deleted file mode 100644
index cd1d18db..00000000
--- a/ANDROID_3.4.5/arch/powerpc/sysdev/xics/xics-common.c
+++ /dev/null
@@ -1,436 +0,0 @@
-/*
- * Copyright 2011 IBM Corporation.
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License
- *  as published by the Free Software Foundation; either version
- *  2 of the License, or (at your option) any later version.
- *
- */
-#include <linux/types.h>
-#include <linux/threads.h>
-#include <linux/kernel.h>
-#include <linux/irq.h>
-#include <linux/debugfs.h>
-#include <linux/smp.h>
-#include <linux/interrupt.h>
-#include <linux/seq_file.h>
-#include <linux/init.h>
-#include <linux/cpu.h>
-#include <linux/of.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-
-#include <asm/prom.h>
-#include <asm/io.h>
-#include <asm/smp.h>
-#include <asm/machdep.h>
-#include <asm/irq.h>
-#include <asm/errno.h>
-#include <asm/rtas.h>
-#include <asm/xics.h>
-#include <asm/firmware.h>
-
-/* Globals common to all ICP/ICS implementations */
-const struct icp_ops	*icp_ops;
-
-unsigned int xics_default_server		= 0xff;
-unsigned int xics_default_distrib_server	= 0;
-unsigned int xics_interrupt_server_size		= 8;
-
-DEFINE_PER_CPU(struct xics_cppr, xics_cppr);
-
-struct irq_domain *xics_host;
-
-static LIST_HEAD(ics_list);
-
-void xics_update_irq_servers(void)
-{
-	int i, j;
-	struct device_node *np;
-	u32 ilen;
-	const u32 *ireg;
-	u32 hcpuid;
-
-	/* Find the server numbers for the boot cpu. */
-	np = of_get_cpu_node(boot_cpuid, NULL);
-	BUG_ON(!np);
-
-	hcpuid = get_hard_smp_processor_id(boot_cpuid);
-	xics_default_server = xics_default_distrib_server = hcpuid;
-
-	pr_devel("xics: xics_default_server = 0x%x\n", xics_default_server);
-
-	ireg = of_get_property(np, "ibm,ppc-interrupt-gserver#s", &ilen);
-	if (!ireg) {
-		of_node_put(np);
-		return;
-	}
-
-	i = ilen / sizeof(int);
-
-	/* Global interrupt distribution server is specified in the last
-	 * entry of "ibm,ppc-interrupt-gserver#s" property. Get the last
-	 * entry fom this property for current boot cpu id and use it as
-	 * default distribution server
-	 */
-	for (j = 0; j < i; j += 2) {
-		if (ireg[j] == hcpuid) {
-			xics_default_distrib_server = ireg[j+1];
-			break;
-		}
-	}
-	pr_devel("xics: xics_default_distrib_server = 0x%x\n",
-		 xics_default_distrib_server);
-	of_node_put(np);
-}
-
-/* GIQ stuff, currently only supported on RTAS setups, will have
- * to be sorted properly for bare metal
- */
-void xics_set_cpu_giq(unsigned int gserver, unsigned int join)
-{
-#ifdef CONFIG_PPC_RTAS
-	int index;
-	int status;
-
-	if (!rtas_indicator_present(GLOBAL_INTERRUPT_QUEUE, NULL))
-		return;
-
-	index = (1UL << xics_interrupt_server_size) - 1 - gserver;
-
-	status = rtas_set_indicator_fast(GLOBAL_INTERRUPT_QUEUE, index, join);
-
-	WARN(status < 0, "set-indicator(%d, %d, %u) returned %d\n",
-	     GLOBAL_INTERRUPT_QUEUE, index, join, status);
-#endif
-}
-
-void xics_setup_cpu(void)
-{
-	icp_ops->set_priority(LOWEST_PRIORITY);
-
-	xics_set_cpu_giq(xics_default_distrib_server, 1);
-}
-
-void xics_mask_unknown_vec(unsigned int vec)
-{
-	struct ics *ics;
-
-	pr_err("Interrupt 0x%x (real) is invalid, disabling it.\n", vec);
-
-	list_for_each_entry(ics, &ics_list, link)
-		ics->mask_unknown(ics, vec);
-}
-
-
-#ifdef CONFIG_SMP
-
-static void xics_request_ipi(void)
-{
-	unsigned int ipi;
-
-	ipi = irq_create_mapping(xics_host, XICS_IPI);
-	BUG_ON(ipi == NO_IRQ);
-
-	/*
-	 * IPIs are marked IRQF_PERCPU. The handler was set in map.
-	 */
-	BUG_ON(request_irq(ipi, icp_ops->ipi_action,
-			   IRQF_PERCPU | IRQF_NO_THREAD, "IPI", NULL));
-}
-
-int __init xics_smp_probe(void)
-{
-	/* Setup cause_ipi callback  based on which ICP is used */
-	smp_ops->cause_ipi = icp_ops->cause_ipi;
-
-	/* Register all the IPIs */
-	xics_request_ipi();
-
-	return cpumask_weight(cpu_possible_mask);
-}
-
-#endif /* CONFIG_SMP */
-
-void xics_teardown_cpu(void)
-{
-	struct xics_cppr *os_cppr = &__get_cpu_var(xics_cppr);
-
-	/*
-	 * we have to reset the cppr index to 0 because we're
-	 * not going to return from the IPI
-	 */
-	os_cppr->index = 0;
-	icp_ops->set_priority(0);
-	icp_ops->teardown_cpu();
-}
-
-void xics_kexec_teardown_cpu(int secondary)
-{
-	xics_teardown_cpu();
-
-	icp_ops->flush_ipi();
-
-	/*
-	 * Some machines need to have at least one cpu in the GIQ,
-	 * so leave the master cpu in the group.
-	 */
-	if (secondary)
-		xics_set_cpu_giq(xics_default_distrib_server, 0);
-}
-
-
-#ifdef CONFIG_HOTPLUG_CPU
-
-/* Interrupts are disabled. */
-void xics_migrate_irqs_away(void)
-{
-	int cpu = smp_processor_id(), hw_cpu = hard_smp_processor_id();
-	unsigned int irq, virq;
-	struct irq_desc *desc;
-
-	/* If we used to be the default server, move to the new "boot_cpuid" */
-	if (hw_cpu == xics_default_server)
-		xics_update_irq_servers();
-
-	/* Reject any interrupt that was queued to us... */
-	icp_ops->set_priority(0);
-
-	/* Remove ourselves from the global interrupt queue */
-	xics_set_cpu_giq(xics_default_distrib_server, 0);
-
-	/* Allow IPIs again... */
-	icp_ops->set_priority(DEFAULT_PRIORITY);
-
-	for_each_irq_desc(virq, desc) {
-		struct irq_chip *chip;
-		long server;
-		unsigned long flags;
-		struct ics *ics;
-
-		/* We can't set affinity on ISA interrupts */
-		if (virq < NUM_ISA_INTERRUPTS)
-			continue;
-		/* We only need to migrate enabled IRQS */
-		if (!desc->action)
-			continue;
-		if (desc->irq_data.domain != xics_host)
-			continue;
-		irq = desc->irq_data.hwirq;
-		/* We need to get IPIs still. */
-		if (irq == XICS_IPI || irq == XICS_IRQ_SPURIOUS)
-			continue;
-		chip = irq_desc_get_chip(desc);
-		if (!chip || !chip->irq_set_affinity)
-			continue;
-
-		raw_spin_lock_irqsave(&desc->lock, flags);
-
-		/* Locate interrupt server */
-		server = -1;
-		ics = irq_get_chip_data(virq);
-		if (ics)
-			server = ics->get_server(ics, irq);
-		if (server < 0) {
-			printk(KERN_ERR "%s: Can't find server for irq %d\n",
-			       __func__, irq);
-			goto unlock;
-		}
-
-		/* We only support delivery to all cpus or to one cpu.
-		 * The irq has to be migrated only in the single cpu
-		 * case.
-		 */
-		if (server != hw_cpu)
-			goto unlock;
-
-		/* This is expected during cpu offline. */
-		if (cpu_online(cpu))
-			pr_warning("IRQ %u affinity broken off cpu %u\n",
-			       virq, cpu);
-
-		/* Reset affinity to all cpus */
-		raw_spin_unlock_irqrestore(&desc->lock, flags);
-		irq_set_affinity(virq, cpu_all_mask);
-		continue;
-unlock:
-		raw_spin_unlock_irqrestore(&desc->lock, flags);
-	}
-}
-#endif /* CONFIG_HOTPLUG_CPU */
-
-#ifdef CONFIG_SMP
-/*
- * For the moment we only implement delivery to all cpus or one cpu.
- *
- * If the requested affinity is cpu_all_mask, we set global affinity.
- * If not we set it to the first cpu in the mask, even if multiple cpus
- * are set. This is so things like irqbalance (which set core and package
- * wide affinities) do the right thing.
- *
- * We need to fix this to implement support for the links
- */
-int xics_get_irq_server(unsigned int virq, const struct cpumask *cpumask,
-			unsigned int strict_check)
-{
-
-	if (!distribute_irqs)
-		return xics_default_server;
-
-	if (!cpumask_subset(cpu_possible_mask, cpumask)) {
-		int server = cpumask_first_and(cpu_online_mask, cpumask);
-
-		if (server < nr_cpu_ids)
-			return get_hard_smp_processor_id(server);
-
-		if (strict_check)
-			return -1;
-	}
-
-	/*
-	 * Workaround issue with some versions of JS20 firmware that
-	 * deliver interrupts to cpus which haven't been started. This
-	 * happens when using the maxcpus= boot option.
-	 */
-	if (cpumask_equal(cpu_online_mask, cpu_present_mask))
-		return xics_default_distrib_server;
-
-	return xics_default_server;
-}
-#endif /* CONFIG_SMP */
-
-static int xics_host_match(struct irq_domain *h, struct device_node *node)
-{
-	struct ics *ics;
-
-	list_for_each_entry(ics, &ics_list, link)
-		if (ics->host_match(ics, node))
-			return 1;
-
-	return 0;
-}
-
-/* Dummies */
-static void xics_ipi_unmask(struct irq_data *d) { }
-static void xics_ipi_mask(struct irq_data *d) { }
-
-static struct irq_chip xics_ipi_chip = {
-	.name = "XICS",
-	.irq_eoi = NULL, /* Patched at init time */
-	.irq_mask = xics_ipi_mask,
-	.irq_unmask = xics_ipi_unmask,
-};
-
-static int xics_host_map(struct irq_domain *h, unsigned int virq,
-			 irq_hw_number_t hw)
-{
-	struct ics *ics;
-
-	pr_devel("xics: map virq %d, hwirq 0x%lx\n", virq, hw);
-
-	/* Insert the interrupt mapping into the radix tree for fast lookup */
-	irq_radix_revmap_insert(xics_host, virq, hw);
-
-	/* They aren't all level sensitive but we just don't really know */
-	irq_set_status_flags(virq, IRQ_LEVEL);
-
-	/* Don't call into ICS for IPIs */
-	if (hw == XICS_IPI) {
-		irq_set_chip_and_handler(virq, &xics_ipi_chip,
-					 handle_percpu_irq);
-		return 0;
-	}
-
-	/* Let the ICS setup the chip data */
-	list_for_each_entry(ics, &ics_list, link)
-		if (ics->map(ics, virq) == 0)
-			return 0;
-
-	return -EINVAL;
-}
-
-static int xics_host_xlate(struct irq_domain *h, struct device_node *ct,
-			   const u32 *intspec, unsigned int intsize,
-			   irq_hw_number_t *out_hwirq, unsigned int *out_flags)
-
-{
-	/* Current xics implementation translates everything
-	 * to level. It is not technically right for MSIs but this
-	 * is irrelevant at this point. We might get smarter in the future
-	 */
-	*out_hwirq = intspec[0];
-	*out_flags = IRQ_TYPE_LEVEL_LOW;
-
-	return 0;
-}
-
-static struct irq_domain_ops xics_host_ops = {
-	.match = xics_host_match,
-	.map = xics_host_map,
-	.xlate = xics_host_xlate,
-};
-
-static void __init xics_init_host(void)
-{
-	xics_host = irq_domain_add_tree(NULL, &xics_host_ops, NULL);
-	BUG_ON(xics_host == NULL);
-	irq_set_default_host(xics_host);
-}
-
-void __init xics_register_ics(struct ics *ics)
-{
-	list_add(&ics->link, &ics_list);
-}
-
-static void __init xics_get_server_size(void)
-{
-	struct device_node *np;
-	const u32 *isize;
-
-	/* We fetch the interrupt server size from the first ICS node
-	 * we find if any
-	 */
-	np = of_find_compatible_node(NULL, NULL, "ibm,ppc-xics");
-	if (!np)
-		return;
-	isize = of_get_property(np, "ibm,interrupt-server#-size", NULL);
-	if (!isize)
-		return;
-	xics_interrupt_server_size = *isize;
-	of_node_put(np);
-}
-
-void __init xics_init(void)
-{
-	int rc = -1;
-
-	/* Fist locate ICP */
-	if (firmware_has_feature(FW_FEATURE_LPAR))
-		rc = icp_hv_init();
-	if (rc < 0)
-		rc = icp_native_init();
-	if (rc < 0) {
-		pr_warning("XICS: Cannot find a Presentation Controller !\n");
-		return;
-	}
-
-	/* Copy get_irq callback over to ppc_md */
-	ppc_md.get_irq = icp_ops->get_irq;
-
-	/* Patch up IPI chip EOI */
-	xics_ipi_chip.irq_eoi = icp_ops->eoi;
-
-	/* Now locate ICS */
-	rc = ics_rtas_init();
-	if (rc < 0)
-		rc = ics_opal_init();
-	if (rc < 0)
-		pr_warning("XICS: Cannot find a Source Controller !\n");
-
-	/* Initialize common bits */
-	xics_get_server_size();
-	xics_update_irq_servers();
-	xics_init_host();
-	xics_setup_cpu();
-}