[PATCH] powerpc: Move xics.[ch] into platforms/pseries

This patch moves the XICS interrupt controller code into the
platforms/pseries directory, since it only appears on pSeries
machines.  If it ever appears on some other machine we can move it to
sysdev, although xics.c itself will need a bunch of changes in that
case to remove pSeries specific assumptions.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 0 insertions, 748 deletions

diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index a20a305b825..3cf7f3dab51 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -53,8 +53,6 @@ obj-$(CONFIG_BOOTX_TEXT)	+= btext.o
 endif
 obj-$(CONFIG_HVCS)              += hvcserver.o
 
-obj-$(CONFIG_XICS)              += xics.o
-
 obj-$(CONFIG_PPC_PMAC)          += udbg_scc.o
 
 obj-$(CONFIG_PPC_MAPLE)         += maple_setup.o maple_pci.o maple_time.o \
diff --git a/arch/ppc64/kernel/xics.c b/arch/ppc64/kernel/xics.c
deleted file mode 100644
index a32207dcf2e..00000000000
--- a/arch/ppc64/kernel/xics.c
+++ /dev/null
@@ -1,746 +0,0 @@
-/* 
- * arch/ppc64/kernel/xics.c
- *
- * Copyright 2000 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/config.h>
-#include <linux/types.h>
-#include <linux/threads.h>
-#include <linux/kernel.h>
-#include <linux/irq.h>
-#include <linux/smp.h>
-#include <linux/interrupt.h>
-#include <linux/signal.h>
-#include <linux/init.h>
-#include <linux/gfp.h>
-#include <linux/radix-tree.h>
-#include <linux/cpu.h>
-#include <asm/prom.h>
-#include <asm/io.h>
-#include <asm/pgtable.h>
-#include <asm/smp.h>
-#include <asm/rtas.h>
-#include <asm/xics.h>
-#include <asm/hvcall.h>
-#include <asm/machdep.h>
-#include <asm/i8259.h>
-
-static unsigned int xics_startup(unsigned int irq);
-static void xics_enable_irq(unsigned int irq);
-static void xics_disable_irq(unsigned int irq);
-static void xics_mask_and_ack_irq(unsigned int irq);
-static void xics_end_irq(unsigned int irq);
-static void xics_set_affinity(unsigned int irq_nr, cpumask_t cpumask);
-
-static struct hw_interrupt_type xics_pic = {
-        .typename = " XICS     ",
-        .startup = xics_startup,
-        .enable = xics_enable_irq,
-        .disable = xics_disable_irq,
-        .ack = xics_mask_and_ack_irq,
-        .end = xics_end_irq,
-        .set_affinity = xics_set_affinity
-};
-
-static struct hw_interrupt_type xics_8259_pic = {
-        .typename = " XICS/8259",
-        .ack = xics_mask_and_ack_irq,
-};
-
-/* This is used to map real irq numbers to virtual */
-static struct radix_tree_root irq_map = RADIX_TREE_INIT(GFP_ATOMIC);
-
-#define XICS_IPI                2
-#define XICS_IRQ_SPURIOUS       0
-
-/* Want a priority other than 0.  Various HW issues require this. */
-#define DEFAULT_PRIORITY        5
-
-/* 
- * Mark IPIs as higher priority so we can take them inside interrupts that
- * arent marked SA_INTERRUPT
- */
-#define IPI_PRIORITY            4
-
-struct xics_ipl {
-        union {
-                u32 word;
-                u8 bytes[4];
-        } xirr_poll;
-        union {
-                u32 word;
-                u8 bytes[4];
-        } xirr;
-        u32 dummy;
-        union {
-                u32 word;
-                u8 bytes[4];
-        } qirr;
-};
-
-static struct xics_ipl __iomem *xics_per_cpu[NR_CPUS];
-
-static int xics_irq_8259_cascade = 0;
-static int xics_irq_8259_cascade_real = 0;
-static unsigned int default_server = 0xFF;
-static unsigned int default_distrib_server = 0;
-static unsigned int interrupt_server_size = 8;
-
-/*
- * XICS only has a single IPI, so encode the messages per CPU
- */
-struct xics_ipi_struct xics_ipi_message[NR_CPUS] __cacheline_aligned;
-
-/* RTAS service tokens */
-static int ibm_get_xive;
-static int ibm_set_xive;
-static int ibm_int_on;
-static int ibm_int_off;
-
-typedef struct {
-        int (*xirr_info_get)(int cpu);
-        void (*xirr_info_set)(int cpu, int val);
-        void (*cppr_info)(int cpu, u8 val);
-        void (*qirr_info)(int cpu, u8 val);
-} xics_ops;
-
-
-/* SMP */
-
-static int pSeries_xirr_info_get(int n_cpu)
-{
-        return in_be32(&xics_per_cpu[n_cpu]->xirr.word);
-}
-
-static void pSeries_xirr_info_set(int n_cpu, int value)
-{
-        out_be32(&xics_per_cpu[n_cpu]->xirr.word, value);
-}
-
-static void pSeries_cppr_info(int n_cpu, u8 value)
-{
-        out_8(&xics_per_cpu[n_cpu]->xirr.bytes[0], value);
-}
-
-static void pSeries_qirr_info(int n_cpu, u8 value)
-{
-        out_8(&xics_per_cpu[n_cpu]->qirr.bytes[0], value);
-}
-
-static xics_ops pSeries_ops = {
-        pSeries_xirr_info_get,
-        pSeries_xirr_info_set,
-        pSeries_cppr_info,
-        pSeries_qirr_info
-};
-
-static xics_ops *ops = &pSeries_ops;
-
-
-/* LPAR */
-
-static inline long plpar_eoi(unsigned long xirr)
-{
-        return plpar_hcall_norets(H_EOI, xirr);
-}
-
-static inline long plpar_cppr(unsigned long cppr)
-{
-        return plpar_hcall_norets(H_CPPR, cppr);
-}
-
-static inline long plpar_ipi(unsigned long servernum, unsigned long mfrr)
-{
-        return plpar_hcall_norets(H_IPI, servernum, mfrr);
-}
-
-static inline long plpar_xirr(unsigned long *xirr_ret)
-{
-        unsigned long dummy;
-        return plpar_hcall(H_XIRR, 0, 0, 0, 0, xirr_ret, &dummy, &dummy);
-}
-
-static int pSeriesLP_xirr_info_get(int n_cpu)
-{
-        unsigned long lpar_rc;
-        unsigned long return_value; 
-
-        lpar_rc = plpar_xirr(&return_value);
-        if (lpar_rc != H_Success)
-                panic(" bad return code xirr - rc = %lx \n", lpar_rc); 
-        return (int)return_value;
-}
-
-static void pSeriesLP_xirr_info_set(int n_cpu, int value)
-{
-        unsigned long lpar_rc;
-        unsigned long val64 = value & 0xffffffff;
-
-        lpar_rc = plpar_eoi(val64);
-        if (lpar_rc != H_Success)
-                panic("bad return code EOI - rc = %ld, value=%lx\n", lpar_rc,
-                      val64); 
-}
-
-void pSeriesLP_cppr_info(int n_cpu, u8 value)
-{
-        unsigned long lpar_rc;
-
-        lpar_rc = plpar_cppr(value);
-        if (lpar_rc != H_Success)
-                panic("bad return code cppr - rc = %lx\n", lpar_rc); 
-}
-
-static void pSeriesLP_qirr_info(int n_cpu , u8 value)
-{
-        unsigned long lpar_rc;
-
-        lpar_rc = plpar_ipi(get_hard_smp_processor_id(n_cpu), value);
-        if (lpar_rc != H_Success)
-                panic("bad return code qirr - rc = %lx\n", lpar_rc); 
-}
-
-xics_ops pSeriesLP_ops = {
-        pSeriesLP_xirr_info_get,
-        pSeriesLP_xirr_info_set,
-        pSeriesLP_cppr_info,
-        pSeriesLP_qirr_info
-};
-
-static unsigned int xics_startup(unsigned int virq)
-{
-        unsigned int irq;
-
-        irq = irq_offset_down(virq);
-        if (radix_tree_insert(&irq_map, virt_irq_to_real(irq),
-                              &virt_irq_to_real_map[irq]) == -ENOMEM)
-                printk(KERN_CRIT "Out of memory creating real -> virtual"
-                       " IRQ mapping for irq %u (real 0x%x)\n",
-                       virq, virt_irq_to_real(irq));
-        xics_enable_irq(virq);
-        return 0;       /* return value is ignored */
-}
-
-static unsigned int real_irq_to_virt(unsigned int real_irq)
-{
-        unsigned int *ptr;
-
-        ptr = radix_tree_lookup(&irq_map, real_irq);
-        if (ptr == NULL)
-                return NO_IRQ;
-        return ptr - virt_irq_to_real_map;
-}
-
-#ifdef CONFIG_SMP
-static int get_irq_server(unsigned int irq)
-{
-        unsigned int server;
-        /* For the moment only implement delivery to all cpus or one cpu */
-        cpumask_t cpumask = irq_affinity[irq];
-        cpumask_t tmp = CPU_MASK_NONE;
-
-        if (!distribute_irqs)
-                return default_server;
-
-        if (cpus_equal(cpumask, CPU_MASK_ALL)) {
-                server = default_distrib_server;
-        } else {
-                cpus_and(tmp, cpu_online_map, cpumask);
-
-                if (cpus_empty(tmp))
-                        server = default_distrib_server;
-                else
-                        server = get_hard_smp_processor_id(first_cpu(tmp));
-        }
-
-        return server;
-
-}
-#else
-static int get_irq_server(unsigned int irq)
-{
-        return default_server;
-}
-#endif
-
-static void xics_enable_irq(unsigned int virq)
-{
-        unsigned int irq;
-        int call_status;
-        unsigned int server;
-
-        irq = virt_irq_to_real(irq_offset_down(virq));
-        if (irq == XICS_IPI)
-                return;
-
-        server = get_irq_server(virq);
-        call_status = rtas_call(ibm_set_xive, 3, 1, NULL, irq, server,
-                                DEFAULT_PRIORITY);
-        if (call_status != 0) {
-                printk(KERN_ERR "xics_enable_irq: irq=%u: ibm_set_xive "
-                       "returned %d\n", irq, call_status);
-                printk("set_xive %x, server %x\n", ibm_set_xive, server);
-                return;
-        }
-
-        /* Now unmask the interrupt (often a no-op) */
-        call_status = rtas_call(ibm_int_on, 1, 1, NULL, irq);
-        if (call_status != 0) {
-                printk(KERN_ERR "xics_enable_irq: irq=%u: ibm_int_on "
-                       "returned %d\n", irq, call_status);
-                return;
-        }
-}
-
-static void xics_disable_real_irq(unsigned int irq)
-{
-        int call_status;
-        unsigned int server;
-
-        if (irq == XICS_IPI)
-                return;
-
-        call_status = rtas_call(ibm_int_off, 1, 1, NULL, irq);
-        if (call_status != 0) {
-                printk(KERN_ERR "xics_disable_real_irq: irq=%u: "
-                       "ibm_int_off returned %d\n", irq, call_status);
-                return;
-        }
-
-        server = get_irq_server(irq);
-        /* Have to set XIVE to 0xff to be able to remove a slot */
-        call_status = rtas_call(ibm_set_xive, 3, 1, NULL, irq, server, 0xff);
-        if (call_status != 0) {
-                printk(KERN_ERR "xics_disable_irq: irq=%u: ibm_set_xive(0xff)"
-                       " returned %d\n", irq, call_status);
-                return;
-        }
-}
-
-static void xics_disable_irq(unsigned int virq)
-{
-        unsigned int irq;
-
-        irq = virt_irq_to_real(irq_offset_down(virq));
-        xics_disable_real_irq(irq);
-}
-
-static void xics_end_irq(unsigned int irq)
-{
-        int cpu = smp_processor_id();
-
-        iosync();
-        ops->xirr_info_set(cpu, ((0xff << 24) |
-                                 (virt_irq_to_real(irq_offset_down(irq)))));
-
-}
-
-static void xics_mask_and_ack_irq(unsigned int irq)
-{
-        int cpu = smp_processor_id();
-
-        if (irq < irq_offset_value()) {
-                i8259_pic.ack(irq);
-                iosync();
-                ops->xirr_info_set(cpu, ((0xff<<24) |
-                                         xics_irq_8259_cascade_real));
-                iosync();
-        }
-}
-
-int xics_get_irq(struct pt_regs *regs)
-{
-        unsigned int cpu = smp_processor_id();
-        unsigned int vec;
-        int irq;
-
-        vec = ops->xirr_info_get(cpu);
-        /*  (vec >> 24) == old priority */
-        vec &= 0x00ffffff;
-
-        /* for sanity, this had better be < NR_IRQS - 16 */
-        if (vec == xics_irq_8259_cascade_real) {
-                irq = i8259_irq(regs);
-                if (irq == -1) {
-                        /* Spurious cascaded interrupt.  Still must ack xics */
-                        xics_end_irq(irq_offset_up(xics_irq_8259_cascade));
-
-                        irq = -1;
-                }
-        } else if (vec == XICS_IRQ_SPURIOUS) {
-                irq = -1;
-        } else {
-                irq = real_irq_to_virt(vec);
-                if (irq == NO_IRQ)
-                        irq = real_irq_to_virt_slowpath(vec);
-                if (irq == NO_IRQ) {
-                        printk(KERN_ERR "Interrupt %u (real) is invalid,"
-                               " disabling it.\n", vec);
-                        xics_disable_real_irq(vec);
-                } else
-                        irq = irq_offset_up(irq);
-        }
-        return irq;
-}
-
-#ifdef CONFIG_SMP
-
-irqreturn_t xics_ipi_action(int irq, void *dev_id, struct pt_regs *regs)
-{
-        int cpu = smp_processor_id();
-
-        ops->qirr_info(cpu, 0xff);
-
-        WARN_ON(cpu_is_offline(cpu));
-
-        while (xics_ipi_message[cpu].value) {
-                if (test_and_clear_bit(PPC_MSG_CALL_FUNCTION,
-                                       &xics_ipi_message[cpu].value)) {
-                        mb();
-                        smp_message_recv(PPC_MSG_CALL_FUNCTION, regs);
-                }
-                if (test_and_clear_bit(PPC_MSG_RESCHEDULE,
-                                       &xics_ipi_message[cpu].value)) {
-                        mb();
-                        smp_message_recv(PPC_MSG_RESCHEDULE, regs);
-                }
-#if 0
-                if (test_and_clear_bit(PPC_MSG_MIGRATE_TASK,
-                                       &xics_ipi_message[cpu].value)) {
-                        mb();
-                        smp_message_recv(PPC_MSG_MIGRATE_TASK, regs);
-                }
-#endif
-#ifdef CONFIG_DEBUGGER
-                if (test_and_clear_bit(PPC_MSG_DEBUGGER_BREAK,
-                                       &xics_ipi_message[cpu].value)) {
-                        mb();
-                        smp_message_recv(PPC_MSG_DEBUGGER_BREAK, regs);
-                }
-#endif
-        }
-        return IRQ_HANDLED;
-}
-
-void xics_cause_IPI(int cpu)
-{
-        ops->qirr_info(cpu, IPI_PRIORITY);
-}
-#endif /* CONFIG_SMP */
-
-void xics_setup_cpu(void)
-{
-        int cpu = smp_processor_id();
-
-        ops->cppr_info(cpu, 0xff);
-        iosync();
-
-        /*
-         * Put the calling processor into the GIQ.  This is really only
-         * necessary from a secondary thread as the OF start-cpu interface
-         * performs this function for us on primary threads.
-         *
-         * XXX: undo of teardown on kexec needs this too, as may hotplug
-         */
-        rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
-                (1UL << interrupt_server_size) - 1 - default_distrib_server, 1);
-}
-
-void xics_init_IRQ(void)
-{
-        int i;
-        unsigned long intr_size = 0;
-        struct device_node *np;
-        uint *ireg, ilen, indx = 0;
-        unsigned long intr_base = 0;
-        struct xics_interrupt_node {
-                unsigned long addr;
-                unsigned long size;
-        } intnodes[NR_CPUS]; 
-
-        ppc64_boot_msg(0x20, "XICS Init");
-
-        ibm_get_xive = rtas_token("ibm,get-xive");
-        ibm_set_xive = rtas_token("ibm,set-xive");
-        ibm_int_on  = rtas_token("ibm,int-on");
-        ibm_int_off = rtas_token("ibm,int-off");
-
-        np = of_find_node_by_type(NULL, "PowerPC-External-Interrupt-Presentation");
-        if (!np)
-                panic("xics_init_IRQ: can't find interrupt presentation");
-
-nextnode:
-        ireg = (uint *)get_property(np, "ibm,interrupt-server-ranges", NULL);
-        if (ireg) {
-                /*
-                 * set node starting index for this node
-                 */
-                indx = *ireg;
-        }
-
-        ireg = (uint *)get_property(np, "reg", &ilen);
-        if (!ireg)
-                panic("xics_init_IRQ: can't find interrupt reg property");
-        
-        while (ilen) {
-                intnodes[indx].addr = (unsigned long)*ireg++ << 32;
-                ilen -= sizeof(uint);
-                intnodes[indx].addr |= *ireg++;
-                ilen -= sizeof(uint);
-                intnodes[indx].size = (unsigned long)*ireg++ << 32;
-                ilen -= sizeof(uint);
-                intnodes[indx].size |= *ireg++;
-                ilen -= sizeof(uint);
-                indx++;
-                if (indx >= NR_CPUS) break;
-        }
-
-        np = of_find_node_by_type(np, "PowerPC-External-Interrupt-Presentation");
-        if ((indx < NR_CPUS) && np) goto nextnode;
-
-        /* Find the server numbers for the boot cpu. */
-        for (np = of_find_node_by_type(NULL, "cpu");
-             np;
-             np = of_find_node_by_type(np, "cpu")) {
-                ireg = (uint *)get_property(np, "reg", &ilen);
-                if (ireg && ireg[0] == boot_cpuid_phys) {
-                        ireg = (uint *)get_property(np, "ibm,ppc-interrupt-gserver#s",
-                                                    &ilen);
-                        i = ilen / sizeof(int);
-                        if (ireg && i > 0) {
-                                default_server = ireg[0];
-                                default_distrib_server = ireg[i-1]; /* take last element */
-                        }
-                        ireg = (uint *)get_property(np,
-                                        "ibm,interrupt-server#-size", NULL);
-                        if (ireg)
-                                interrupt_server_size = *ireg;
-                        break;
-                }
-        }
-        of_node_put(np);
-
-        intr_base = intnodes[0].addr;
-        intr_size = intnodes[0].size;
-
-        np = of_find_node_by_type(NULL, "interrupt-controller");
-        if (!np) {
-                printk(KERN_WARNING "xics: no ISA interrupt controller\n");
-                xics_irq_8259_cascade_real = -1;
-                xics_irq_8259_cascade = -1;
-        } else {
-                ireg = (uint *) get_property(np, "interrupts", NULL);
-                if (!ireg)
-                        panic("xics_init_IRQ: can't find ISA interrupts property");
-
-                xics_irq_8259_cascade_real = *ireg;
-                xics_irq_8259_cascade
-                        = virt_irq_create_mapping(xics_irq_8259_cascade_real);
-                of_node_put(np);
-        }
-
-        if (systemcfg->platform == PLATFORM_PSERIES) {
-#ifdef CONFIG_SMP
-                for_each_cpu(i) {
-                        int hard_id;
-
-                        /* FIXME: Do this dynamically! --RR */
-                        if (!cpu_present(i))
-                                continue;
-
-                        hard_id = get_hard_smp_processor_id(i);
-                        xics_per_cpu[i] = ioremap(intnodes[hard_id].addr, 
-                                                  intnodes[hard_id].size);
-                }
-#else
-                xics_per_cpu[0] = ioremap(intr_base, intr_size);
-#endif /* CONFIG_SMP */
-        } else if (systemcfg->platform == PLATFORM_PSERIES_LPAR) {
-                ops = &pSeriesLP_ops;
-        }
-
-        xics_8259_pic.enable = i8259_pic.enable;
-        xics_8259_pic.disable = i8259_pic.disable;
-        for (i = 0; i < 16; ++i)
-                get_irq_desc(i)->handler = &xics_8259_pic;
-        for (; i < NR_IRQS; ++i)
-                get_irq_desc(i)->handler = &xics_pic;
-
-        xics_setup_cpu();
-
-        ppc64_boot_msg(0x21, "XICS Done");
-}
-
-/*
- * We cant do this in init_IRQ because we need the memory subsystem up for
- * request_irq()
- */
-static int __init xics_setup_i8259(void)
-{
-        if (ppc64_interrupt_controller == IC_PPC_XIC &&
-            xics_irq_8259_cascade != -1) {
-                if (request_irq(irq_offset_up(xics_irq_8259_cascade),
-                                no_action, 0, "8259 cascade", NULL))
-                        printk(KERN_ERR "xics_setup_i8259: couldn't get 8259 "
-                                        "cascade\n");
-                i8259_init(0, 0);
-        }
-        return 0;
-}
-arch_initcall(xics_setup_i8259);
-
-#ifdef CONFIG_SMP
-void xics_request_IPIs(void)
-{
-        virt_irq_to_real_map[XICS_IPI] = XICS_IPI;
-
-        /* IPIs are marked SA_INTERRUPT as they must run with irqs disabled */
-        request_irq(irq_offset_up(XICS_IPI), xics_ipi_action, SA_INTERRUPT,
-                    "IPI", NULL);
-        get_irq_desc(irq_offset_up(XICS_IPI))->status |= IRQ_PER_CPU;
-}
-#endif
-
-static void xics_set_affinity(unsigned int virq, cpumask_t cpumask)
-{
-        unsigned int irq;
-        int status;
-        int xics_status[2];
-        unsigned long newmask;
-        cpumask_t tmp = CPU_MASK_NONE;
-
-        irq = virt_irq_to_real(irq_offset_down(virq));
-        if (irq == XICS_IPI || irq == NO_IRQ)
-                return;
-
-        status = rtas_call(ibm_get_xive, 1, 3, xics_status, irq);
-
-        if (status) {
-                printk(KERN_ERR "xics_set_affinity: irq=%u ibm,get-xive "
-                       "returns %d\n", irq, status);
-                return;
-        }
-
-        /* For the moment only implement delivery to all cpus or one cpu */
-        if (cpus_equal(cpumask, CPU_MASK_ALL)) {
-                newmask = default_distrib_server;
-        } else {
-                cpus_and(tmp, cpu_online_map, cpumask);
-                if (cpus_empty(tmp))
-                        return;
-                newmask = get_hard_smp_processor_id(first_cpu(tmp));
-        }
-
-        status = rtas_call(ibm_set_xive, 3, 1, NULL,
-                                irq, newmask, xics_status[1]);
-
-        if (status) {
-                printk(KERN_ERR "xics_set_affinity: irq=%u ibm,set-xive "
-                       "returns %d\n", irq, status);
-                return;
-        }
-}
-
-void xics_teardown_cpu(int secondary)
-{
-        int cpu = smp_processor_id();
-
-        ops->cppr_info(cpu, 0x00);
-        iosync();
-
-        /*
-         * Some machines need to have at least one cpu in the GIQ,
-         * so leave the master cpu in the group.
-         */
-        if (secondary) {
-                /*
-                 * we need to EOI the IPI if we got here from kexec down IPI
-                 *
-                 * probably need to check all the other interrupts too
-                 * should we be flagging idle loop instead?
-                 * or creating some task to be scheduled?
-                 */
-                ops->xirr_info_set(cpu, XICS_IPI);
-                rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
-                        (1UL << interrupt_server_size) - 1 -
-                        default_distrib_server, 0);
-        }
-}
-
-#ifdef CONFIG_HOTPLUG_CPU
-
-/* Interrupts are disabled. */
-void xics_migrate_irqs_away(void)
-{
-        int status;
-        unsigned int irq, virq, cpu = smp_processor_id();
-
-        /* Reject any interrupt that was queued to us... */
-        ops->cppr_info(cpu, 0);
-        iosync();
-
-        /* remove ourselves from the global interrupt queue */
-        status = rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
-                (1UL << interrupt_server_size) - 1 - default_distrib_server, 0);
-        WARN_ON(status < 0);
-
-        /* Allow IPIs again... */
-        ops->cppr_info(cpu, DEFAULT_PRIORITY);
-        iosync();
-
-        for_each_irq(virq) {
-                irq_desc_t *desc;
-                int xics_status[2];
-                unsigned long flags;
-
-                /* We cant set affinity on ISA interrupts */
-                if (virq < irq_offset_value())
-                        continue;
-
-                desc = get_irq_desc(virq);
-                irq = virt_irq_to_real(irq_offset_down(virq));
-
-                /* We need to get IPIs still. */
-                if (irq == XICS_IPI || irq == NO_IRQ)
-                        continue;
-
-                /* We only need to migrate enabled IRQS */
-                if (desc == NULL || desc->handler == NULL
-                    || desc->action == NULL
-                    || desc->handler->set_affinity == NULL)
-                        continue;
-
-                spin_lock_irqsave(&desc->lock, flags);
-
-                status = rtas_call(ibm_get_xive, 1, 3, xics_status, irq);
-                if (status) {
-                        printk(KERN_ERR "migrate_irqs_away: irq=%u "
-                                        "ibm,get-xive returns %d\n",
-                                        virq, status);
-                        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 (xics_status[0] != get_hard_smp_processor_id(cpu))
-                        goto unlock;
-
-                printk(KERN_WARNING "IRQ %u affinity broken off cpu %u\n",
-                       virq, cpu);
-
-                /* Reset affinity to all cpus */
-                desc->handler->set_affinity(virq, CPU_MASK_ALL);
-                irq_affinity[virq] = CPU_MASK_ALL;
-unlock:
-                spin_unlock_irqrestore(&desc->lock, flags);
-        }
-}
-#endif