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Diffstat (limited to 'arch/powerpc/platforms/cell/beat_interrupt.c')
-rw-r--r--arch/powerpc/platforms/cell/beat_interrupt.c253
1 files changed, 0 insertions, 253 deletions
diff --git a/arch/powerpc/platforms/cell/beat_interrupt.c b/arch/powerpc/platforms/cell/beat_interrupt.c
deleted file mode 100644
index 9e5dfbcc00af..000000000000
--- a/arch/powerpc/platforms/cell/beat_interrupt.c
+++ /dev/null
@@ -1,253 +0,0 @@
-/*
- * Celleb/Beat Interrupt controller
- *
- * (C) Copyright 2006-2007 TOSHIBA 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/percpu.h>
-#include <linux/types.h>
-
-#include <asm/machdep.h>
-
-#include "beat_interrupt.h"
-#include "beat_wrapper.h"
-
-#define MAX_IRQS NR_IRQS
-static DEFINE_RAW_SPINLOCK(beatic_irq_mask_lock);
-static uint64_t beatic_irq_mask_enable[(MAX_IRQS+255)/64];
-static uint64_t beatic_irq_mask_ack[(MAX_IRQS+255)/64];
-
-static struct irq_domain *beatic_host;
-
-/*
- * In this implementation, "virq" == "IRQ plug number",
- * "(irq_hw_number_t)hwirq" == "IRQ outlet number".
- */
-
-/* assumption: locked */
-static inline void beatic_update_irq_mask(unsigned int irq_plug)
-{
- int off;
- unsigned long masks[4];
-
- off = (irq_plug / 256) * 4;
- masks[0] = beatic_irq_mask_enable[off + 0]
- & beatic_irq_mask_ack[off + 0];
- masks[1] = beatic_irq_mask_enable[off + 1]
- & beatic_irq_mask_ack[off + 1];
- masks[2] = beatic_irq_mask_enable[off + 2]
- & beatic_irq_mask_ack[off + 2];
- masks[3] = beatic_irq_mask_enable[off + 3]
- & beatic_irq_mask_ack[off + 3];
- if (beat_set_interrupt_mask(irq_plug&~255UL,
- masks[0], masks[1], masks[2], masks[3]) != 0)
- panic("Failed to set mask IRQ!");
-}
-
-static void beatic_mask_irq(struct irq_data *d)
-{
- unsigned long flags;
-
- raw_spin_lock_irqsave(&beatic_irq_mask_lock, flags);
- beatic_irq_mask_enable[d->irq/64] &= ~(1UL << (63 - (d->irq%64)));
- beatic_update_irq_mask(d->irq);
- raw_spin_unlock_irqrestore(&beatic_irq_mask_lock, flags);
-}
-
-static void beatic_unmask_irq(struct irq_data *d)
-{
- unsigned long flags;
-
- raw_spin_lock_irqsave(&beatic_irq_mask_lock, flags);
- beatic_irq_mask_enable[d->irq/64] |= 1UL << (63 - (d->irq%64));
- beatic_update_irq_mask(d->irq);
- raw_spin_unlock_irqrestore(&beatic_irq_mask_lock, flags);
-}
-
-static void beatic_ack_irq(struct irq_data *d)
-{
- unsigned long flags;
-
- raw_spin_lock_irqsave(&beatic_irq_mask_lock, flags);
- beatic_irq_mask_ack[d->irq/64] &= ~(1UL << (63 - (d->irq%64)));
- beatic_update_irq_mask(d->irq);
- raw_spin_unlock_irqrestore(&beatic_irq_mask_lock, flags);
-}
-
-static void beatic_end_irq(struct irq_data *d)
-{
- s64 err;
- unsigned long flags;
-
- err = beat_downcount_of_interrupt(d->irq);
- if (err != 0) {
- if ((err & 0xFFFFFFFF) != 0xFFFFFFF5) /* -11: wrong state */
- panic("Failed to downcount IRQ! Error = %16llx", err);
-
- printk(KERN_ERR "IRQ over-downcounted, plug %d\n", d->irq);
- }
- raw_spin_lock_irqsave(&beatic_irq_mask_lock, flags);
- beatic_irq_mask_ack[d->irq/64] |= 1UL << (63 - (d->irq%64));
- beatic_update_irq_mask(d->irq);
- raw_spin_unlock_irqrestore(&beatic_irq_mask_lock, flags);
-}
-
-static struct irq_chip beatic_pic = {
- .name = "CELL-BEAT",
- .irq_unmask = beatic_unmask_irq,
- .irq_mask = beatic_mask_irq,
- .irq_eoi = beatic_end_irq,
-};
-
-/*
- * Dispose binding hardware IRQ number (hw) and Virtuql IRQ number (virq),
- * update flags.
- *
- * Note that the number (virq) is already assigned at upper layer.
- */
-static void beatic_pic_host_unmap(struct irq_domain *h, unsigned int virq)
-{
- beat_destruct_irq_plug(virq);
-}
-
-/*
- * Create or update binding hardware IRQ number (hw) and Virtuql
- * IRQ number (virq). This is called only once for a given mapping.
- *
- * Note that the number (virq) is already assigned at upper layer.
- */
-static int beatic_pic_host_map(struct irq_domain *h, unsigned int virq,
- irq_hw_number_t hw)
-{
- int64_t err;
-
- err = beat_construct_and_connect_irq_plug(virq, hw);
- if (err < 0)
- return -EIO;
-
- irq_set_status_flags(virq, IRQ_LEVEL);
- irq_set_chip_and_handler(virq, &beatic_pic, handle_fasteoi_irq);
- return 0;
-}
-
-/*
- * Translate device-tree interrupt spec to irq_hw_number_t style (ulong),
- * to pass away to irq_create_mapping().
- *
- * Called from irq_create_of_mapping() only.
- * Note: We have only 1 entry to translate.
- */
-static int beatic_pic_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)
-{
- const u64 *intspec2 = (const u64 *)intspec;
-
- *out_hwirq = *intspec2;
- *out_flags |= IRQ_TYPE_LEVEL_LOW;
- return 0;
-}
-
-static int beatic_pic_host_match(struct irq_domain *h, struct device_node *np)
-{
- /* Match all */
- return 1;
-}
-
-static const struct irq_domain_ops beatic_pic_host_ops = {
- .map = beatic_pic_host_map,
- .unmap = beatic_pic_host_unmap,
- .xlate = beatic_pic_host_xlate,
- .match = beatic_pic_host_match,
-};
-
-/*
- * Get an IRQ number
- * Note: returns VIRQ
- */
-static inline unsigned int beatic_get_irq_plug(void)
-{
- int i;
- uint64_t pending[4], ub;
-
- for (i = 0; i < MAX_IRQS; i += 256) {
- beat_detect_pending_interrupts(i, pending);
- __asm__ ("cntlzd %0,%1":"=r"(ub):
- "r"(pending[0] & beatic_irq_mask_enable[i/64+0]
- & beatic_irq_mask_ack[i/64+0]));
- if (ub != 64)
- return i + ub + 0;
- __asm__ ("cntlzd %0,%1":"=r"(ub):
- "r"(pending[1] & beatic_irq_mask_enable[i/64+1]
- & beatic_irq_mask_ack[i/64+1]));
- if (ub != 64)
- return i + ub + 64;
- __asm__ ("cntlzd %0,%1":"=r"(ub):
- "r"(pending[2] & beatic_irq_mask_enable[i/64+2]
- & beatic_irq_mask_ack[i/64+2]));
- if (ub != 64)
- return i + ub + 128;
- __asm__ ("cntlzd %0,%1":"=r"(ub):
- "r"(pending[3] & beatic_irq_mask_enable[i/64+3]
- & beatic_irq_mask_ack[i/64+3]));
- if (ub != 64)
- return i + ub + 192;
- }
-
- return NO_IRQ;
-}
-unsigned int beatic_get_irq(void)
-{
- unsigned int ret;
-
- ret = beatic_get_irq_plug();
- if (ret != NO_IRQ)
- beatic_ack_irq(irq_get_irq_data(ret));
- return ret;
-}
-
-/*
- */
-void __init beatic_init_IRQ(void)
-{
- int i;
-
- memset(beatic_irq_mask_enable, 0, sizeof(beatic_irq_mask_enable));
- memset(beatic_irq_mask_ack, 255, sizeof(beatic_irq_mask_ack));
- for (i = 0; i < MAX_IRQS; i += 256)
- beat_set_interrupt_mask(i, 0L, 0L, 0L, 0L);
-
- /* Set out get_irq function */
- ppc_md.get_irq = beatic_get_irq;
-
- /* Allocate an irq host */
- beatic_host = irq_domain_add_nomap(NULL, ~0, &beatic_pic_host_ops, NULL);
- BUG_ON(beatic_host == NULL);
- irq_set_default_host(beatic_host);
-}
-
-void beatic_deinit_IRQ(void)
-{
- int i;
-
- for (i = 1; i < nr_irqs; i++)
- beat_destruct_irq_plug(i);
-}