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-rw-r--r--arch/powerpc/platforms/cell/spu_base.c797
1 files changed, 797 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
new file mode 100644
index 000000000..bc4823444
--- /dev/null
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -0,0 +1,797 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Low-level SPU handling
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
+ *
+ * Author: Arnd Bergmann <arndb@de.ibm.com>
+ */
+
+#undef DEBUG
+
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/init.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/wait.h>
+#include <linux/mm.h>
+#include <linux/io.h>
+#include <linux/mutex.h>
+#include <linux/linux_logo.h>
+#include <linux/syscore_ops.h>
+#include <asm/spu.h>
+#include <asm/spu_priv1.h>
+#include <asm/spu_csa.h>
+#include <asm/xmon.h>
+#include <asm/prom.h>
+#include <asm/kexec.h>
+
+const struct spu_management_ops *spu_management_ops;
+EXPORT_SYMBOL_GPL(spu_management_ops);
+
+const struct spu_priv1_ops *spu_priv1_ops;
+EXPORT_SYMBOL_GPL(spu_priv1_ops);
+
+struct cbe_spu_info cbe_spu_info[MAX_NUMNODES];
+EXPORT_SYMBOL_GPL(cbe_spu_info);
+
+/*
+ * The spufs fault-handling code needs to call force_sig_fault to raise signals
+ * on DMA errors. Export it here to avoid general kernel-wide access to this
+ * function
+ */
+EXPORT_SYMBOL_GPL(force_sig_fault);
+
+/*
+ * Protects cbe_spu_info and spu->number.
+ */
+static DEFINE_SPINLOCK(spu_lock);
+
+/*
+ * List of all spus in the system.
+ *
+ * This list is iterated by callers from irq context and callers that
+ * want to sleep. Thus modifications need to be done with both
+ * spu_full_list_lock and spu_full_list_mutex held, while iterating
+ * through it requires either of these locks.
+ *
+ * In addition spu_full_list_lock protects all assignments to
+ * spu->mm.
+ */
+static LIST_HEAD(spu_full_list);
+static DEFINE_SPINLOCK(spu_full_list_lock);
+static DEFINE_MUTEX(spu_full_list_mutex);
+
+void spu_invalidate_slbs(struct spu *spu)
+{
+ struct spu_priv2 __iomem *priv2 = spu->priv2;
+ unsigned long flags;
+
+ spin_lock_irqsave(&spu->register_lock, flags);
+ if (spu_mfc_sr1_get(spu) & MFC_STATE1_RELOCATE_MASK)
+ out_be64(&priv2->slb_invalidate_all_W, 0UL);
+ spin_unlock_irqrestore(&spu->register_lock, flags);
+}
+EXPORT_SYMBOL_GPL(spu_invalidate_slbs);
+
+/* This is called by the MM core when a segment size is changed, to
+ * request a flush of all the SPEs using a given mm
+ */
+void spu_flush_all_slbs(struct mm_struct *mm)
+{
+ struct spu *spu;
+ unsigned long flags;
+
+ spin_lock_irqsave(&spu_full_list_lock, flags);
+ list_for_each_entry(spu, &spu_full_list, full_list) {
+ if (spu->mm == mm)
+ spu_invalidate_slbs(spu);
+ }
+ spin_unlock_irqrestore(&spu_full_list_lock, flags);
+}
+
+/* The hack below stinks... try to do something better one of
+ * these days... Does it even work properly with NR_CPUS == 1 ?
+ */
+static inline void mm_needs_global_tlbie(struct mm_struct *mm)
+{
+ int nr = (NR_CPUS > 1) ? NR_CPUS : NR_CPUS + 1;
+
+ /* Global TLBIE broadcast required with SPEs. */
+ bitmap_fill(cpumask_bits(mm_cpumask(mm)), nr);
+}
+
+void spu_associate_mm(struct spu *spu, struct mm_struct *mm)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&spu_full_list_lock, flags);
+ spu->mm = mm;
+ spin_unlock_irqrestore(&spu_full_list_lock, flags);
+ if (mm)
+ mm_needs_global_tlbie(mm);
+}
+EXPORT_SYMBOL_GPL(spu_associate_mm);
+
+int spu_64k_pages_available(void)
+{
+ return mmu_psize_defs[MMU_PAGE_64K].shift != 0;
+}
+EXPORT_SYMBOL_GPL(spu_64k_pages_available);
+
+static void spu_restart_dma(struct spu *spu)
+{
+ struct spu_priv2 __iomem *priv2 = spu->priv2;
+
+ if (!test_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags))
+ out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND);
+ else {
+ set_bit(SPU_CONTEXT_FAULT_PENDING, &spu->flags);
+ mb();
+ }
+}
+
+static inline void spu_load_slb(struct spu *spu, int slbe, struct copro_slb *slb)
+{
+ struct spu_priv2 __iomem *priv2 = spu->priv2;
+
+ pr_debug("%s: adding SLB[%d] 0x%016llx 0x%016llx\n",
+ __func__, slbe, slb->vsid, slb->esid);
+
+ out_be64(&priv2->slb_index_W, slbe);
+ /* set invalid before writing vsid */
+ out_be64(&priv2->slb_esid_RW, 0);
+ /* now it's safe to write the vsid */
+ out_be64(&priv2->slb_vsid_RW, slb->vsid);
+ /* setting the new esid makes the entry valid again */
+ out_be64(&priv2->slb_esid_RW, slb->esid);
+}
+
+static int __spu_trap_data_seg(struct spu *spu, unsigned long ea)
+{
+ struct copro_slb slb;
+ int ret;
+
+ ret = copro_calculate_slb(spu->mm, ea, &slb);
+ if (ret)
+ return ret;
+
+ spu_load_slb(spu, spu->slb_replace, &slb);
+
+ spu->slb_replace++;
+ if (spu->slb_replace >= 8)
+ spu->slb_replace = 0;
+
+ spu_restart_dma(spu);
+ spu->stats.slb_flt++;
+ return 0;
+}
+
+extern int hash_page(unsigned long ea, unsigned long access,
+ unsigned long trap, unsigned long dsisr); //XXX
+static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr)
+{
+ int ret;
+
+ pr_debug("%s, %llx, %lx\n", __func__, dsisr, ea);
+
+ /*
+ * Handle kernel space hash faults immediately. User hash
+ * faults need to be deferred to process context.
+ */
+ if ((dsisr & MFC_DSISR_PTE_NOT_FOUND) &&
+ (get_region_id(ea) != USER_REGION_ID)) {
+
+ spin_unlock(&spu->register_lock);
+ ret = hash_page(ea,
+ _PAGE_PRESENT | _PAGE_READ | _PAGE_PRIVILEGED,
+ 0x300, dsisr);
+ spin_lock(&spu->register_lock);
+
+ if (!ret) {
+ spu_restart_dma(spu);
+ return 0;
+ }
+ }
+
+ spu->class_1_dar = ea;
+ spu->class_1_dsisr = dsisr;
+
+ spu->stop_callback(spu, 1);
+
+ spu->class_1_dar = 0;
+ spu->class_1_dsisr = 0;
+
+ return 0;
+}
+
+static void __spu_kernel_slb(void *addr, struct copro_slb *slb)
+{
+ unsigned long ea = (unsigned long)addr;
+ u64 llp;
+
+ if (get_region_id(ea) == LINEAR_MAP_REGION_ID)
+ llp = mmu_psize_defs[mmu_linear_psize].sllp;
+ else
+ llp = mmu_psize_defs[mmu_virtual_psize].sllp;
+
+ slb->vsid = (get_kernel_vsid(ea, MMU_SEGSIZE_256M) << SLB_VSID_SHIFT) |
+ SLB_VSID_KERNEL | llp;
+ slb->esid = (ea & ESID_MASK) | SLB_ESID_V;
+}
+
+/**
+ * Given an array of @nr_slbs SLB entries, @slbs, return non-zero if the
+ * address @new_addr is present.
+ */
+static inline int __slb_present(struct copro_slb *slbs, int nr_slbs,
+ void *new_addr)
+{
+ unsigned long ea = (unsigned long)new_addr;
+ int i;
+
+ for (i = 0; i < nr_slbs; i++)
+ if (!((slbs[i].esid ^ ea) & ESID_MASK))
+ return 1;
+
+ return 0;
+}
+
+/**
+ * Setup the SPU kernel SLBs, in preparation for a context save/restore. We
+ * need to map both the context save area, and the save/restore code.
+ *
+ * Because the lscsa and code may cross segment boundaries, we check to see
+ * if mappings are required for the start and end of each range. We currently
+ * assume that the mappings are smaller that one segment - if not, something
+ * is seriously wrong.
+ */
+void spu_setup_kernel_slbs(struct spu *spu, struct spu_lscsa *lscsa,
+ void *code, int code_size)
+{
+ struct copro_slb slbs[4];
+ int i, nr_slbs = 0;
+ /* start and end addresses of both mappings */
+ void *addrs[] = {
+ lscsa, (void *)lscsa + sizeof(*lscsa) - 1,
+ code, code + code_size - 1
+ };
+
+ /* check the set of addresses, and create a new entry in the slbs array
+ * if there isn't already a SLB for that address */
+ for (i = 0; i < ARRAY_SIZE(addrs); i++) {
+ if (__slb_present(slbs, nr_slbs, addrs[i]))
+ continue;
+
+ __spu_kernel_slb(addrs[i], &slbs[nr_slbs]);
+ nr_slbs++;
+ }
+
+ spin_lock_irq(&spu->register_lock);
+ /* Add the set of SLBs */
+ for (i = 0; i < nr_slbs; i++)
+ spu_load_slb(spu, i, &slbs[i]);
+ spin_unlock_irq(&spu->register_lock);
+}
+EXPORT_SYMBOL_GPL(spu_setup_kernel_slbs);
+
+static irqreturn_t
+spu_irq_class_0(int irq, void *data)
+{
+ struct spu *spu;
+ unsigned long stat, mask;
+
+ spu = data;
+
+ spin_lock(&spu->register_lock);
+ mask = spu_int_mask_get(spu, 0);
+ stat = spu_int_stat_get(spu, 0) & mask;
+
+ spu->class_0_pending |= stat;
+ spu->class_0_dar = spu_mfc_dar_get(spu);
+ spu->stop_callback(spu, 0);
+ spu->class_0_pending = 0;
+ spu->class_0_dar = 0;
+
+ spu_int_stat_clear(spu, 0, stat);
+ spin_unlock(&spu->register_lock);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t
+spu_irq_class_1(int irq, void *data)
+{
+ struct spu *spu;
+ unsigned long stat, mask, dar, dsisr;
+
+ spu = data;
+
+ /* atomically read & clear class1 status. */
+ spin_lock(&spu->register_lock);
+ mask = spu_int_mask_get(spu, 1);
+ stat = spu_int_stat_get(spu, 1) & mask;
+ dar = spu_mfc_dar_get(spu);
+ dsisr = spu_mfc_dsisr_get(spu);
+ if (stat & CLASS1_STORAGE_FAULT_INTR)
+ spu_mfc_dsisr_set(spu, 0ul);
+ spu_int_stat_clear(spu, 1, stat);
+
+ pr_debug("%s: %lx %lx %lx %lx\n", __func__, mask, stat,
+ dar, dsisr);
+
+ if (stat & CLASS1_SEGMENT_FAULT_INTR)
+ __spu_trap_data_seg(spu, dar);
+
+ if (stat & CLASS1_STORAGE_FAULT_INTR)
+ __spu_trap_data_map(spu, dar, dsisr);
+
+ if (stat & CLASS1_LS_COMPARE_SUSPEND_ON_GET_INTR)
+ ;
+
+ if (stat & CLASS1_LS_COMPARE_SUSPEND_ON_PUT_INTR)
+ ;
+
+ spu->class_1_dsisr = 0;
+ spu->class_1_dar = 0;
+
+ spin_unlock(&spu->register_lock);
+
+ return stat ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static irqreturn_t
+spu_irq_class_2(int irq, void *data)
+{
+ struct spu *spu;
+ unsigned long stat;
+ unsigned long mask;
+ const int mailbox_intrs =
+ CLASS2_MAILBOX_THRESHOLD_INTR | CLASS2_MAILBOX_INTR;
+
+ spu = data;
+ spin_lock(&spu->register_lock);
+ stat = spu_int_stat_get(spu, 2);
+ mask = spu_int_mask_get(spu, 2);
+ /* ignore interrupts we're not waiting for */
+ stat &= mask;
+ /* mailbox interrupts are level triggered. mask them now before
+ * acknowledging */
+ if (stat & mailbox_intrs)
+ spu_int_mask_and(spu, 2, ~(stat & mailbox_intrs));
+ /* acknowledge all interrupts before the callbacks */
+ spu_int_stat_clear(spu, 2, stat);
+
+ pr_debug("class 2 interrupt %d, %lx, %lx\n", irq, stat, mask);
+
+ if (stat & CLASS2_MAILBOX_INTR)
+ spu->ibox_callback(spu);
+
+ if (stat & CLASS2_SPU_STOP_INTR)
+ spu->stop_callback(spu, 2);
+
+ if (stat & CLASS2_SPU_HALT_INTR)
+ spu->stop_callback(spu, 2);
+
+ if (stat & CLASS2_SPU_DMA_TAG_GROUP_COMPLETE_INTR)
+ spu->mfc_callback(spu);
+
+ if (stat & CLASS2_MAILBOX_THRESHOLD_INTR)
+ spu->wbox_callback(spu);
+
+ spu->stats.class2_intr++;
+
+ spin_unlock(&spu->register_lock);
+
+ return stat ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static int spu_request_irqs(struct spu *spu)
+{
+ int ret = 0;
+
+ if (spu->irqs[0]) {
+ snprintf(spu->irq_c0, sizeof (spu->irq_c0), "spe%02d.0",
+ spu->number);
+ ret = request_irq(spu->irqs[0], spu_irq_class_0,
+ 0, spu->irq_c0, spu);
+ if (ret)
+ goto bail0;
+ }
+ if (spu->irqs[1]) {
+ snprintf(spu->irq_c1, sizeof (spu->irq_c1), "spe%02d.1",
+ spu->number);
+ ret = request_irq(spu->irqs[1], spu_irq_class_1,
+ 0, spu->irq_c1, spu);
+ if (ret)
+ goto bail1;
+ }
+ if (spu->irqs[2]) {
+ snprintf(spu->irq_c2, sizeof (spu->irq_c2), "spe%02d.2",
+ spu->number);
+ ret = request_irq(spu->irqs[2], spu_irq_class_2,
+ 0, spu->irq_c2, spu);
+ if (ret)
+ goto bail2;
+ }
+ return 0;
+
+bail2:
+ if (spu->irqs[1])
+ free_irq(spu->irqs[1], spu);
+bail1:
+ if (spu->irqs[0])
+ free_irq(spu->irqs[0], spu);
+bail0:
+ return ret;
+}
+
+static void spu_free_irqs(struct spu *spu)
+{
+ if (spu->irqs[0])
+ free_irq(spu->irqs[0], spu);
+ if (spu->irqs[1])
+ free_irq(spu->irqs[1], spu);
+ if (spu->irqs[2])
+ free_irq(spu->irqs[2], spu);
+}
+
+void spu_init_channels(struct spu *spu)
+{
+ static const struct {
+ unsigned channel;
+ unsigned count;
+ } zero_list[] = {
+ { 0x00, 1, }, { 0x01, 1, }, { 0x03, 1, }, { 0x04, 1, },
+ { 0x18, 1, }, { 0x19, 1, }, { 0x1b, 1, }, { 0x1d, 1, },
+ }, count_list[] = {
+ { 0x00, 0, }, { 0x03, 0, }, { 0x04, 0, }, { 0x15, 16, },
+ { 0x17, 1, }, { 0x18, 0, }, { 0x19, 0, }, { 0x1b, 0, },
+ { 0x1c, 1, }, { 0x1d, 0, }, { 0x1e, 1, },
+ };
+ struct spu_priv2 __iomem *priv2;
+ int i;
+
+ priv2 = spu->priv2;
+
+ /* initialize all channel data to zero */
+ for (i = 0; i < ARRAY_SIZE(zero_list); i++) {
+ int count;
+
+ out_be64(&priv2->spu_chnlcntptr_RW, zero_list[i].channel);
+ for (count = 0; count < zero_list[i].count; count++)
+ out_be64(&priv2->spu_chnldata_RW, 0);
+ }
+
+ /* initialize channel counts to meaningful values */
+ for (i = 0; i < ARRAY_SIZE(count_list); i++) {
+ out_be64(&priv2->spu_chnlcntptr_RW, count_list[i].channel);
+ out_be64(&priv2->spu_chnlcnt_RW, count_list[i].count);
+ }
+}
+EXPORT_SYMBOL_GPL(spu_init_channels);
+
+static struct bus_type spu_subsys = {
+ .name = "spu",
+ .dev_name = "spu",
+};
+
+int spu_add_dev_attr(struct device_attribute *attr)
+{
+ struct spu *spu;
+
+ mutex_lock(&spu_full_list_mutex);
+ list_for_each_entry(spu, &spu_full_list, full_list)
+ device_create_file(&spu->dev, attr);
+ mutex_unlock(&spu_full_list_mutex);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(spu_add_dev_attr);
+
+int spu_add_dev_attr_group(struct attribute_group *attrs)
+{
+ struct spu *spu;
+ int rc = 0;
+
+ mutex_lock(&spu_full_list_mutex);
+ list_for_each_entry(spu, &spu_full_list, full_list) {
+ rc = sysfs_create_group(&spu->dev.kobj, attrs);
+
+ /* we're in trouble here, but try unwinding anyway */
+ if (rc) {
+ printk(KERN_ERR "%s: can't create sysfs group '%s'\n",
+ __func__, attrs->name);
+
+ list_for_each_entry_continue_reverse(spu,
+ &spu_full_list, full_list)
+ sysfs_remove_group(&spu->dev.kobj, attrs);
+ break;
+ }
+ }
+
+ mutex_unlock(&spu_full_list_mutex);
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(spu_add_dev_attr_group);
+
+
+void spu_remove_dev_attr(struct device_attribute *attr)
+{
+ struct spu *spu;
+
+ mutex_lock(&spu_full_list_mutex);
+ list_for_each_entry(spu, &spu_full_list, full_list)
+ device_remove_file(&spu->dev, attr);
+ mutex_unlock(&spu_full_list_mutex);
+}
+EXPORT_SYMBOL_GPL(spu_remove_dev_attr);
+
+void spu_remove_dev_attr_group(struct attribute_group *attrs)
+{
+ struct spu *spu;
+
+ mutex_lock(&spu_full_list_mutex);
+ list_for_each_entry(spu, &spu_full_list, full_list)
+ sysfs_remove_group(&spu->dev.kobj, attrs);
+ mutex_unlock(&spu_full_list_mutex);
+}
+EXPORT_SYMBOL_GPL(spu_remove_dev_attr_group);
+
+static int spu_create_dev(struct spu *spu)
+{
+ int ret;
+
+ spu->dev.id = spu->number;
+ spu->dev.bus = &spu_subsys;
+ ret = device_register(&spu->dev);
+ if (ret) {
+ printk(KERN_ERR "Can't register SPU %d with sysfs\n",
+ spu->number);
+ return ret;
+ }
+
+ sysfs_add_device_to_node(&spu->dev, spu->node);
+
+ return 0;
+}
+
+static int __init create_spu(void *data)
+{
+ struct spu *spu;
+ int ret;
+ static int number;
+ unsigned long flags;
+
+ ret = -ENOMEM;
+ spu = kzalloc(sizeof (*spu), GFP_KERNEL);
+ if (!spu)
+ goto out;
+
+ spu->alloc_state = SPU_FREE;
+
+ spin_lock_init(&spu->register_lock);
+ spin_lock(&spu_lock);
+ spu->number = number++;
+ spin_unlock(&spu_lock);
+
+ ret = spu_create_spu(spu, data);
+
+ if (ret)
+ goto out_free;
+
+ spu_mfc_sdr_setup(spu);
+ spu_mfc_sr1_set(spu, 0x33);
+ ret = spu_request_irqs(spu);
+ if (ret)
+ goto out_destroy;
+
+ ret = spu_create_dev(spu);
+ if (ret)
+ goto out_free_irqs;
+
+ mutex_lock(&cbe_spu_info[spu->node].list_mutex);
+ list_add(&spu->cbe_list, &cbe_spu_info[spu->node].spus);
+ cbe_spu_info[spu->node].n_spus++;
+ mutex_unlock(&cbe_spu_info[spu->node].list_mutex);
+
+ mutex_lock(&spu_full_list_mutex);
+ spin_lock_irqsave(&spu_full_list_lock, flags);
+ list_add(&spu->full_list, &spu_full_list);
+ spin_unlock_irqrestore(&spu_full_list_lock, flags);
+ mutex_unlock(&spu_full_list_mutex);
+
+ spu->stats.util_state = SPU_UTIL_IDLE_LOADED;
+ spu->stats.tstamp = ktime_get_ns();
+
+ INIT_LIST_HEAD(&spu->aff_list);
+
+ goto out;
+
+out_free_irqs:
+ spu_free_irqs(spu);
+out_destroy:
+ spu_destroy_spu(spu);
+out_free:
+ kfree(spu);
+out:
+ return ret;
+}
+
+static const char *spu_state_names[] = {
+ "user", "system", "iowait", "idle"
+};
+
+static unsigned long long spu_acct_time(struct spu *spu,
+ enum spu_utilization_state state)
+{
+ unsigned long long time = spu->stats.times[state];
+
+ /*
+ * If the spu is idle or the context is stopped, utilization
+ * statistics are not updated. Apply the time delta from the
+ * last recorded state of the spu.
+ */
+ if (spu->stats.util_state == state)
+ time += ktime_get_ns() - spu->stats.tstamp;
+
+ return time / NSEC_PER_MSEC;
+}
+
+
+static ssize_t spu_stat_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct spu *spu = container_of(dev, struct spu, dev);
+
+ return sprintf(buf, "%s %llu %llu %llu %llu "
+ "%llu %llu %llu %llu %llu %llu %llu %llu\n",
+ spu_state_names[spu->stats.util_state],
+ spu_acct_time(spu, SPU_UTIL_USER),
+ spu_acct_time(spu, SPU_UTIL_SYSTEM),
+ spu_acct_time(spu, SPU_UTIL_IOWAIT),
+ spu_acct_time(spu, SPU_UTIL_IDLE_LOADED),
+ spu->stats.vol_ctx_switch,
+ spu->stats.invol_ctx_switch,
+ spu->stats.slb_flt,
+ spu->stats.hash_flt,
+ spu->stats.min_flt,
+ spu->stats.maj_flt,
+ spu->stats.class2_intr,
+ spu->stats.libassist);
+}
+
+static DEVICE_ATTR(stat, 0444, spu_stat_show, NULL);
+
+#ifdef CONFIG_KEXEC_CORE
+
+struct crash_spu_info {
+ struct spu *spu;
+ u32 saved_spu_runcntl_RW;
+ u32 saved_spu_status_R;
+ u32 saved_spu_npc_RW;
+ u64 saved_mfc_sr1_RW;
+ u64 saved_mfc_dar;
+ u64 saved_mfc_dsisr;
+};
+
+#define CRASH_NUM_SPUS 16 /* Enough for current hardware */
+static struct crash_spu_info crash_spu_info[CRASH_NUM_SPUS];
+
+static void crash_kexec_stop_spus(void)
+{
+ struct spu *spu;
+ int i;
+ u64 tmp;
+
+ for (i = 0; i < CRASH_NUM_SPUS; i++) {
+ if (!crash_spu_info[i].spu)
+ continue;
+
+ spu = crash_spu_info[i].spu;
+
+ crash_spu_info[i].saved_spu_runcntl_RW =
+ in_be32(&spu->problem->spu_runcntl_RW);
+ crash_spu_info[i].saved_spu_status_R =
+ in_be32(&spu->problem->spu_status_R);
+ crash_spu_info[i].saved_spu_npc_RW =
+ in_be32(&spu->problem->spu_npc_RW);
+
+ crash_spu_info[i].saved_mfc_dar = spu_mfc_dar_get(spu);
+ crash_spu_info[i].saved_mfc_dsisr = spu_mfc_dsisr_get(spu);
+ tmp = spu_mfc_sr1_get(spu);
+ crash_spu_info[i].saved_mfc_sr1_RW = tmp;
+
+ tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK;
+ spu_mfc_sr1_set(spu, tmp);
+
+ __delay(200);
+ }
+}
+
+static void crash_register_spus(struct list_head *list)
+{
+ struct spu *spu;
+ int ret;
+
+ list_for_each_entry(spu, list, full_list) {
+ if (WARN_ON(spu->number >= CRASH_NUM_SPUS))
+ continue;
+
+ crash_spu_info[spu->number].spu = spu;
+ }
+
+ ret = crash_shutdown_register(&crash_kexec_stop_spus);
+ if (ret)
+ printk(KERN_ERR "Could not register SPU crash handler");
+}
+
+#else
+static inline void crash_register_spus(struct list_head *list)
+{
+}
+#endif
+
+static void spu_shutdown(void)
+{
+ struct spu *spu;
+
+ mutex_lock(&spu_full_list_mutex);
+ list_for_each_entry(spu, &spu_full_list, full_list) {
+ spu_free_irqs(spu);
+ spu_destroy_spu(spu);
+ }
+ mutex_unlock(&spu_full_list_mutex);
+}
+
+static struct syscore_ops spu_syscore_ops = {
+ .shutdown = spu_shutdown,
+};
+
+static int __init init_spu_base(void)
+{
+ int i, ret = 0;
+
+ for (i = 0; i < MAX_NUMNODES; i++) {
+ mutex_init(&cbe_spu_info[i].list_mutex);
+ INIT_LIST_HEAD(&cbe_spu_info[i].spus);
+ }
+
+ if (!spu_management_ops)
+ goto out;
+
+ /* create system subsystem for spus */
+ ret = subsys_system_register(&spu_subsys, NULL);
+ if (ret)
+ goto out;
+
+ ret = spu_enumerate_spus(create_spu);
+
+ if (ret < 0) {
+ printk(KERN_WARNING "%s: Error initializing spus\n",
+ __func__);
+ goto out_unregister_subsys;
+ }
+
+ if (ret > 0)
+ fb_append_extra_logo(&logo_spe_clut224, ret);
+
+ mutex_lock(&spu_full_list_mutex);
+ xmon_register_spus(&spu_full_list);
+ crash_register_spus(&spu_full_list);
+ mutex_unlock(&spu_full_list_mutex);
+ spu_add_dev_attr(&dev_attr_stat);
+ register_syscore_ops(&spu_syscore_ops);
+
+ spu_init_affinity();
+
+ return 0;
+
+ out_unregister_subsys:
+ bus_unregister(&spu_subsys);
+ out:
+ return ret;
+}
+device_initcall(init_spu_base);