diff options
Diffstat (limited to 'arch/powerpc/platforms/cell/beat_interrupt.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/beat_interrupt.c | 253 |
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); -} |