File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/drivers/sh/intc/Kconfig b/drivers/sh/intc/Kconfig
new file mode 100644
index 0000000..6a1b05d
--- /dev/null
+++ b/drivers/sh/intc/Kconfig
@@ -0,0 +1,43 @@
+config SH_INTC
+ bool
+ select IRQ_DOMAIN
+
+if SH_INTC
+
+comment "Interrupt controller options"
+
+config INTC_USERIMASK
+ bool "Userspace interrupt masking support"
+ depends on (SUPERH && CPU_SH4A) || COMPILE_TEST
+ help
+ This enables support for hardware-assisted userspace hardirq
+ masking.
+
+ SH-4A and newer interrupt blocks all support a special shadowed
+ page with all non-masking registers obscured when mapped in to
+ userspace. This is primarily for use by userspace device
+ drivers that are using special priority levels.
+
+ If in doubt, say N.
+
+config INTC_BALANCING
+ bool "Hardware IRQ balancing support"
+ depends on SMP && SUPERH && CPU_SHX3
+ help
+ This enables support for IRQ auto-distribution mode on SH-X3
+ SMP parts. All of the balancing and CPU wakeup decisions are
+ taken care of automatically by hardware for distributed
+ vectors.
+
+ If in doubt, say N.
+
+config INTC_MAPPING_DEBUG
+ bool "Expose IRQ to per-controller id mapping via debugfs"
+ depends on DEBUG_FS
+ help
+ This will create a debugfs entry for showing the relationship
+ between system IRQs and the per-controller id tables.
+
+ If in doubt, say N.
+
+endif
diff --git a/drivers/sh/intc/Makefile b/drivers/sh/intc/Makefile
new file mode 100644
index 0000000..54ec2a0
--- /dev/null
+++ b/drivers/sh/intc/Makefile
@@ -0,0 +1,5 @@
+obj-y := access.o chip.o core.o handle.o irqdomain.o virq.o
+
+obj-$(CONFIG_INTC_BALANCING) += balancing.o
+obj-$(CONFIG_INTC_USERIMASK) += userimask.o
+obj-$(CONFIG_INTC_MAPPING_DEBUG) += virq-debugfs.o
diff --git a/drivers/sh/intc/access.c b/drivers/sh/intc/access.c
new file mode 100644
index 0000000..114390f
--- /dev/null
+++ b/drivers/sh/intc/access.c
@@ -0,0 +1,246 @@
+/*
+ * Common INTC2 register accessors
+ *
+ * Copyright (C) 2007, 2008 Magnus Damm
+ * Copyright (C) 2009, 2010 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/io.h>
+#include "internals.h"
+
+unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address)
+{
+ struct intc_window *window;
+ int k;
+
+ /* scan through physical windows and convert address */
+ for (k = 0; k < d->nr_windows; k++) {
+ window = d->window + k;
+
+ if (address < window->phys)
+ continue;
+
+ if (address >= (window->phys + window->size))
+ continue;
+
+ address -= window->phys;
+ address += (unsigned long)window->virt;
+
+ return address;
+ }
+
+ /* no windows defined, register must be 1:1 mapped virt:phys */
+ return address;
+}
+
+unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address)
+{
+ unsigned int k;
+
+ address = intc_phys_to_virt(d, address);
+
+ for (k = 0; k < d->nr_reg; k++) {
+ if (d->reg[k] == address)
+ return k;
+ }
+
+ BUG();
+ return 0;
+}
+
+unsigned int intc_set_field_from_handle(unsigned int value,
+ unsigned int field_value,
+ unsigned int handle)
+{
+ unsigned int width = _INTC_WIDTH(handle);
+ unsigned int shift = _INTC_SHIFT(handle);
+
+ value &= ~(((1 << width) - 1) << shift);
+ value |= field_value << shift;
+ return value;
+}
+
+unsigned long intc_get_field_from_handle(unsigned int value, unsigned int handle)
+{
+ unsigned int width = _INTC_WIDTH(handle);
+ unsigned int shift = _INTC_SHIFT(handle);
+ unsigned int mask = ((1 << width) - 1) << shift;
+
+ return (value & mask) >> shift;
+}
+
+static unsigned long test_8(unsigned long addr, unsigned long h,
+ unsigned long ignore)
+{
+ void __iomem *ptr = (void __iomem *)addr;
+ return intc_get_field_from_handle(__raw_readb(ptr), h);
+}
+
+static unsigned long test_16(unsigned long addr, unsigned long h,
+ unsigned long ignore)
+{
+ void __iomem *ptr = (void __iomem *)addr;
+ return intc_get_field_from_handle(__raw_readw(ptr), h);
+}
+
+static unsigned long test_32(unsigned long addr, unsigned long h,
+ unsigned long ignore)
+{
+ void __iomem *ptr = (void __iomem *)addr;
+ return intc_get_field_from_handle(__raw_readl(ptr), h);
+}
+
+static unsigned long write_8(unsigned long addr, unsigned long h,
+ unsigned long data)
+{
+ void __iomem *ptr = (void __iomem *)addr;
+ __raw_writeb(intc_set_field_from_handle(0, data, h), ptr);
+ (void)__raw_readb(ptr); /* Defeat write posting */
+ return 0;
+}
+
+static unsigned long write_16(unsigned long addr, unsigned long h,
+ unsigned long data)
+{
+ void __iomem *ptr = (void __iomem *)addr;
+ __raw_writew(intc_set_field_from_handle(0, data, h), ptr);
+ (void)__raw_readw(ptr); /* Defeat write posting */
+ return 0;
+}
+
+static unsigned long write_32(unsigned long addr, unsigned long h,
+ unsigned long data)
+{
+ void __iomem *ptr = (void __iomem *)addr;
+ __raw_writel(intc_set_field_from_handle(0, data, h), ptr);
+ (void)__raw_readl(ptr); /* Defeat write posting */
+ return 0;
+}
+
+static unsigned long modify_8(unsigned long addr, unsigned long h,
+ unsigned long data)
+{
+ void __iomem *ptr = (void __iomem *)addr;
+ unsigned long flags;
+ unsigned int value;
+ local_irq_save(flags);
+ value = intc_set_field_from_handle(__raw_readb(ptr), data, h);
+ __raw_writeb(value, ptr);
+ (void)__raw_readb(ptr); /* Defeat write posting */
+ local_irq_restore(flags);
+ return 0;
+}
+
+static unsigned long modify_16(unsigned long addr, unsigned long h,
+ unsigned long data)
+{
+ void __iomem *ptr = (void __iomem *)addr;
+ unsigned long flags;
+ unsigned int value;
+ local_irq_save(flags);
+ value = intc_set_field_from_handle(__raw_readw(ptr), data, h);
+ __raw_writew(value, ptr);
+ (void)__raw_readw(ptr); /* Defeat write posting */
+ local_irq_restore(flags);
+ return 0;
+}
+
+static unsigned long modify_32(unsigned long addr, unsigned long h,
+ unsigned long data)
+{
+ void __iomem *ptr = (void __iomem *)addr;
+ unsigned long flags;
+ unsigned int value;
+ local_irq_save(flags);
+ value = intc_set_field_from_handle(__raw_readl(ptr), data, h);
+ __raw_writel(value, ptr);
+ (void)__raw_readl(ptr); /* Defeat write posting */
+ local_irq_restore(flags);
+ return 0;
+}
+
+static unsigned long intc_mode_field(unsigned long addr,
+ unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long,
+ unsigned long),
+ unsigned int irq)
+{
+ return fn(addr, handle, ((1 << _INTC_WIDTH(handle)) - 1));
+}
+
+static unsigned long intc_mode_zero(unsigned long addr,
+ unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long,
+ unsigned long),
+ unsigned int irq)
+{
+ return fn(addr, handle, 0);
+}
+
+static unsigned long intc_mode_prio(unsigned long addr,
+ unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long,
+ unsigned long),
+ unsigned int irq)
+{
+ return fn(addr, handle, intc_get_prio_level(irq));
+}
+
+unsigned long (*intc_reg_fns[])(unsigned long addr,
+ unsigned long h,
+ unsigned long data) = {
+ [REG_FN_TEST_BASE + 0] = test_8,
+ [REG_FN_TEST_BASE + 1] = test_16,
+ [REG_FN_TEST_BASE + 3] = test_32,
+ [REG_FN_WRITE_BASE + 0] = write_8,
+ [REG_FN_WRITE_BASE + 1] = write_16,
+ [REG_FN_WRITE_BASE + 3] = write_32,
+ [REG_FN_MODIFY_BASE + 0] = modify_8,
+ [REG_FN_MODIFY_BASE + 1] = modify_16,
+ [REG_FN_MODIFY_BASE + 3] = modify_32,
+};
+
+unsigned long (*intc_enable_fns[])(unsigned long addr,
+ unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long,
+ unsigned long),
+ unsigned int irq) = {
+ [MODE_ENABLE_REG] = intc_mode_field,
+ [MODE_MASK_REG] = intc_mode_zero,
+ [MODE_DUAL_REG] = intc_mode_field,
+ [MODE_PRIO_REG] = intc_mode_prio,
+ [MODE_PCLR_REG] = intc_mode_prio,
+};
+
+unsigned long (*intc_disable_fns[])(unsigned long addr,
+ unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long,
+ unsigned long),
+ unsigned int irq) = {
+ [MODE_ENABLE_REG] = intc_mode_zero,
+ [MODE_MASK_REG] = intc_mode_field,
+ [MODE_DUAL_REG] = intc_mode_field,
+ [MODE_PRIO_REG] = intc_mode_zero,
+ [MODE_PCLR_REG] = intc_mode_field,
+};
+
+unsigned long (*intc_enable_noprio_fns[])(unsigned long addr,
+ unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long,
+ unsigned long),
+ unsigned int irq) = {
+ [MODE_ENABLE_REG] = intc_mode_field,
+ [MODE_MASK_REG] = intc_mode_zero,
+ [MODE_DUAL_REG] = intc_mode_field,
+ [MODE_PRIO_REG] = intc_mode_field,
+ [MODE_PCLR_REG] = intc_mode_field,
+};
diff --git a/drivers/sh/intc/balancing.c b/drivers/sh/intc/balancing.c
new file mode 100644
index 0000000..bc78080
--- /dev/null
+++ b/drivers/sh/intc/balancing.c
@@ -0,0 +1,97 @@
+/*
+ * Support for hardware-managed IRQ auto-distribution.
+ *
+ * Copyright (C) 2010 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include "internals.h"
+
+static unsigned long dist_handle[INTC_NR_IRQS];
+
+void intc_balancing_enable(unsigned int irq)
+{
+ struct intc_desc_int *d = get_intc_desc(irq);
+ unsigned long handle = dist_handle[irq];
+ unsigned long addr;
+
+ if (irq_balancing_disabled(irq) || !handle)
+ return;
+
+ addr = INTC_REG(d, _INTC_ADDR_D(handle), 0);
+ intc_reg_fns[_INTC_FN(handle)](addr, handle, 1);
+}
+
+void intc_balancing_disable(unsigned int irq)
+{
+ struct intc_desc_int *d = get_intc_desc(irq);
+ unsigned long handle = dist_handle[irq];
+ unsigned long addr;
+
+ if (irq_balancing_disabled(irq) || !handle)
+ return;
+
+ addr = INTC_REG(d, _INTC_ADDR_D(handle), 0);
+ intc_reg_fns[_INTC_FN(handle)](addr, handle, 0);
+}
+
+static unsigned int intc_dist_data(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id)
+{
+ struct intc_mask_reg *mr = desc->hw.mask_regs;
+ unsigned int i, j, fn, mode;
+ unsigned long reg_e, reg_d;
+
+ for (i = 0; mr && enum_id && i < desc->hw.nr_mask_regs; i++) {
+ mr = desc->hw.mask_regs + i;
+
+ /*
+ * Skip this entry if there's no auto-distribution
+ * register associated with it.
+ */
+ if (!mr->dist_reg)
+ continue;
+
+ for (j = 0; j < ARRAY_SIZE(mr->enum_ids); j++) {
+ if (mr->enum_ids[j] != enum_id)
+ continue;
+
+ fn = REG_FN_MODIFY_BASE;
+ mode = MODE_ENABLE_REG;
+ reg_e = mr->dist_reg;
+ reg_d = mr->dist_reg;
+
+ fn += (mr->reg_width >> 3) - 1;
+ return _INTC_MK(fn, mode,
+ intc_get_reg(d, reg_e),
+ intc_get_reg(d, reg_d),
+ 1,
+ (mr->reg_width - 1) - j);
+ }
+ }
+
+ /*
+ * It's possible we've gotten here with no distribution options
+ * available for the IRQ in question, so we just skip over those.
+ */
+ return 0;
+}
+
+void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
+ struct intc_desc_int *d, intc_enum id)
+{
+ unsigned long flags;
+
+ /*
+ * Nothing to do for this IRQ.
+ */
+ if (!desc->hw.mask_regs)
+ return;
+
+ raw_spin_lock_irqsave(&intc_big_lock, flags);
+ dist_handle[irq] = intc_dist_data(desc, d, id);
+ raw_spin_unlock_irqrestore(&intc_big_lock, flags);
+}
diff --git a/drivers/sh/intc/chip.c b/drivers/sh/intc/chip.c
new file mode 100644
index 0000000..358df75
--- /dev/null
+++ b/drivers/sh/intc/chip.c
@@ -0,0 +1,211 @@
+/*
+ * IRQ chip definitions for INTC IRQs.
+ *
+ * Copyright (C) 2007, 2008 Magnus Damm
+ * Copyright (C) 2009 - 2012 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/cpumask.h>
+#include <linux/bsearch.h>
+#include <linux/io.h>
+#include "internals.h"
+
+void _intc_enable(struct irq_data *data, unsigned long handle)
+{
+ unsigned int irq = data->irq;
+ struct intc_desc_int *d = get_intc_desc(irq);
+ unsigned long addr;
+ unsigned int cpu;
+
+ for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_E(handle)); cpu++) {
+#ifdef CONFIG_SMP
+ if (!cpumask_test_cpu(cpu, irq_data_get_affinity_mask(data)))
+ continue;
+#endif
+ addr = INTC_REG(d, _INTC_ADDR_E(handle), cpu);
+ intc_enable_fns[_INTC_MODE(handle)](addr, handle, intc_reg_fns\
+ [_INTC_FN(handle)], irq);
+ }
+
+ intc_balancing_enable(irq);
+}
+
+static void intc_enable(struct irq_data *data)
+{
+ _intc_enable(data, (unsigned long)irq_data_get_irq_chip_data(data));
+}
+
+static void intc_disable(struct irq_data *data)
+{
+ unsigned int irq = data->irq;
+ struct intc_desc_int *d = get_intc_desc(irq);
+ unsigned long handle = (unsigned long)irq_data_get_irq_chip_data(data);
+ unsigned long addr;
+ unsigned int cpu;
+
+ intc_balancing_disable(irq);
+
+ for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_D(handle)); cpu++) {
+#ifdef CONFIG_SMP
+ if (!cpumask_test_cpu(cpu, irq_data_get_affinity_mask(data)))
+ continue;
+#endif
+ addr = INTC_REG(d, _INTC_ADDR_D(handle), cpu);
+ intc_disable_fns[_INTC_MODE(handle)](addr, handle,intc_reg_fns\
+ [_INTC_FN(handle)], irq);
+ }
+}
+
+#ifdef CONFIG_SMP
+/*
+ * This is held with the irq desc lock held, so we don't require any
+ * additional locking here at the intc desc level. The affinity mask is
+ * later tested in the enable/disable paths.
+ */
+static int intc_set_affinity(struct irq_data *data,
+ const struct cpumask *cpumask,
+ bool force)
+{
+ if (!cpumask_intersects(cpumask, cpu_online_mask))
+ return -1;
+
+ cpumask_copy(irq_data_get_affinity_mask(data), cpumask);
+
+ return IRQ_SET_MASK_OK_NOCOPY;
+}
+#endif
+
+static void intc_mask_ack(struct irq_data *data)
+{
+ unsigned int irq = data->irq;
+ struct intc_desc_int *d = get_intc_desc(irq);
+ unsigned long handle = intc_get_ack_handle(irq);
+ void __iomem *addr;
+
+ intc_disable(data);
+
+ /* read register and write zero only to the associated bit */
+ if (handle) {
+ unsigned int value;
+
+ addr = (void __iomem *)INTC_REG(d, _INTC_ADDR_D(handle), 0);
+ value = intc_set_field_from_handle(0, 1, handle);
+
+ switch (_INTC_FN(handle)) {
+ case REG_FN_MODIFY_BASE + 0: /* 8bit */
+ __raw_readb(addr);
+ __raw_writeb(0xff ^ value, addr);
+ break;
+ case REG_FN_MODIFY_BASE + 1: /* 16bit */
+ __raw_readw(addr);
+ __raw_writew(0xffff ^ value, addr);
+ break;
+ case REG_FN_MODIFY_BASE + 3: /* 32bit */
+ __raw_readl(addr);
+ __raw_writel(0xffffffff ^ value, addr);
+ break;
+ default:
+ BUG();
+ break;
+ }
+ }
+}
+
+static struct intc_handle_int *intc_find_irq(struct intc_handle_int *hp,
+ unsigned int nr_hp,
+ unsigned int irq)
+{
+ struct intc_handle_int key;
+
+ key.irq = irq;
+ key.handle = 0;
+
+ return bsearch(&key, hp, nr_hp, sizeof(*hp), intc_handle_int_cmp);
+}
+
+int intc_set_priority(unsigned int irq, unsigned int prio)
+{
+ struct intc_desc_int *d = get_intc_desc(irq);
+ struct irq_data *data = irq_get_irq_data(irq);
+ struct intc_handle_int *ihp;
+
+ if (!intc_get_prio_level(irq) || prio <= 1)
+ return -EINVAL;
+
+ ihp = intc_find_irq(d->prio, d->nr_prio, irq);
+ if (ihp) {
+ if (prio >= (1 << _INTC_WIDTH(ihp->handle)))
+ return -EINVAL;
+
+ intc_set_prio_level(irq, prio);
+
+ /*
+ * only set secondary masking method directly
+ * primary masking method is using intc_prio_level[irq]
+ * priority level will be set during next enable()
+ */
+ if (_INTC_FN(ihp->handle) != REG_FN_ERR)
+ _intc_enable(data, ihp->handle);
+ }
+ return 0;
+}
+
+#define SENSE_VALID_FLAG 0x80
+#define VALID(x) (x | SENSE_VALID_FLAG)
+
+static unsigned char intc_irq_sense_table[IRQ_TYPE_SENSE_MASK + 1] = {
+ [IRQ_TYPE_EDGE_FALLING] = VALID(0),
+ [IRQ_TYPE_EDGE_RISING] = VALID(1),
+ [IRQ_TYPE_LEVEL_LOW] = VALID(2),
+ /* SH7706, SH7707 and SH7709 do not support high level triggered */
+#if !defined(CONFIG_CPU_SUBTYPE_SH7706) && \
+ !defined(CONFIG_CPU_SUBTYPE_SH7707) && \
+ !defined(CONFIG_CPU_SUBTYPE_SH7709)
+ [IRQ_TYPE_LEVEL_HIGH] = VALID(3),
+#endif
+#if defined(CONFIG_ARM) /* all recent SH-Mobile / R-Mobile ARM support this */
+ [IRQ_TYPE_EDGE_BOTH] = VALID(4),
+#endif
+};
+
+static int intc_set_type(struct irq_data *data, unsigned int type)
+{
+ unsigned int irq = data->irq;
+ struct intc_desc_int *d = get_intc_desc(irq);
+ unsigned char value = intc_irq_sense_table[type & IRQ_TYPE_SENSE_MASK];
+ struct intc_handle_int *ihp;
+ unsigned long addr;
+
+ if (!value)
+ return -EINVAL;
+
+ value &= ~SENSE_VALID_FLAG;
+
+ ihp = intc_find_irq(d->sense, d->nr_sense, irq);
+ if (ihp) {
+ /* PINT has 2-bit sense registers, should fail on EDGE_BOTH */
+ if (value >= (1 << _INTC_WIDTH(ihp->handle)))
+ return -EINVAL;
+
+ addr = INTC_REG(d, _INTC_ADDR_E(ihp->handle), 0);
+ intc_reg_fns[_INTC_FN(ihp->handle)](addr, ihp->handle, value);
+ }
+
+ return 0;
+}
+
+struct irq_chip intc_irq_chip = {
+ .irq_mask = intc_disable,
+ .irq_unmask = intc_enable,
+ .irq_mask_ack = intc_mask_ack,
+ .irq_enable = intc_enable,
+ .irq_disable = intc_disable,
+ .irq_set_type = intc_set_type,
+#ifdef CONFIG_SMP
+ .irq_set_affinity = intc_set_affinity,
+#endif
+ .flags = IRQCHIP_SKIP_SET_WAKE,
+};
diff --git a/drivers/sh/intc/core.c b/drivers/sh/intc/core.c
new file mode 100644
index 0000000..8e72bcb
--- /dev/null
+++ b/drivers/sh/intc/core.c
@@ -0,0 +1,512 @@
+/*
+ * Shared interrupt handling code for IPR and INTC2 types of IRQs.
+ *
+ * Copyright (C) 2007, 2008 Magnus Damm
+ * Copyright (C) 2009 - 2012 Paul Mundt
+ *
+ * Based on intc2.c and ipr.c
+ *
+ * Copyright (C) 1999 Niibe Yutaka & Takeshi Yaegashi
+ * Copyright (C) 2000 Kazumoto Kojima
+ * Copyright (C) 2001 David J. Mckay (david.mckay@st.com)
+ * Copyright (C) 2003 Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp>
+ * Copyright (C) 2005, 2006 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#define pr_fmt(fmt) "intc: " fmt
+
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/interrupt.h>
+#include <linux/sh_intc.h>
+#include <linux/irqdomain.h>
+#include <linux/device.h>
+#include <linux/syscore_ops.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/radix-tree.h>
+#include <linux/export.h>
+#include <linux/sort.h>
+#include "internals.h"
+
+LIST_HEAD(intc_list);
+DEFINE_RAW_SPINLOCK(intc_big_lock);
+static unsigned int nr_intc_controllers;
+
+/*
+ * Default priority level
+ * - this needs to be at least 2 for 5-bit priorities on 7780
+ */
+static unsigned int default_prio_level = 2; /* 2 - 16 */
+static unsigned int intc_prio_level[INTC_NR_IRQS]; /* for now */
+
+unsigned int intc_get_dfl_prio_level(void)
+{
+ return default_prio_level;
+}
+
+unsigned int intc_get_prio_level(unsigned int irq)
+{
+ return intc_prio_level[irq];
+}
+
+void intc_set_prio_level(unsigned int irq, unsigned int level)
+{
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&intc_big_lock, flags);
+ intc_prio_level[irq] = level;
+ raw_spin_unlock_irqrestore(&intc_big_lock, flags);
+}
+
+static void intc_redirect_irq(struct irq_desc *desc)
+{
+ generic_handle_irq((unsigned int)irq_desc_get_handler_data(desc));
+}
+
+static void __init intc_register_irq(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id,
+ unsigned int irq)
+{
+ struct intc_handle_int *hp;
+ struct irq_data *irq_data;
+ unsigned int data[2], primary;
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&intc_big_lock, flags);
+ radix_tree_insert(&d->tree, enum_id, intc_irq_xlate_get(irq));
+ raw_spin_unlock_irqrestore(&intc_big_lock, flags);
+
+ /*
+ * Prefer single interrupt source bitmap over other combinations:
+ *
+ * 1. bitmap, single interrupt source
+ * 2. priority, single interrupt source
+ * 3. bitmap, multiple interrupt sources (groups)
+ * 4. priority, multiple interrupt sources (groups)
+ */
+ data[0] = intc_get_mask_handle(desc, d, enum_id, 0);
+ data[1] = intc_get_prio_handle(desc, d, enum_id, 0);
+
+ primary = 0;
+ if (!data[0] && data[1])
+ primary = 1;
+
+ if (!data[0] && !data[1])
+ pr_warning("missing unique irq mask for irq %d (vect 0x%04x)\n",
+ irq, irq2evt(irq));
+
+ data[0] = data[0] ? data[0] : intc_get_mask_handle(desc, d, enum_id, 1);
+ data[1] = data[1] ? data[1] : intc_get_prio_handle(desc, d, enum_id, 1);
+
+ if (!data[primary])
+ primary ^= 1;
+
+ BUG_ON(!data[primary]); /* must have primary masking method */
+
+ irq_data = irq_get_irq_data(irq);
+
+ disable_irq_nosync(irq);
+ irq_set_chip_and_handler_name(irq, &d->chip, handle_level_irq,
+ "level");
+ irq_set_chip_data(irq, (void *)data[primary]);
+
+ /*
+ * set priority level
+ */
+ intc_set_prio_level(irq, intc_get_dfl_prio_level());
+
+ /* enable secondary masking method if present */
+ if (data[!primary])
+ _intc_enable(irq_data, data[!primary]);
+
+ /* add irq to d->prio list if priority is available */
+ if (data[1]) {
+ hp = d->prio + d->nr_prio;
+ hp->irq = irq;
+ hp->handle = data[1];
+
+ if (primary) {
+ /*
+ * only secondary priority should access registers, so
+ * set _INTC_FN(h) = REG_FN_ERR for intc_set_priority()
+ */
+ hp->handle &= ~_INTC_MK(0x0f, 0, 0, 0, 0, 0);
+ hp->handle |= _INTC_MK(REG_FN_ERR, 0, 0, 0, 0, 0);
+ }
+ d->nr_prio++;
+ }
+
+ /* add irq to d->sense list if sense is available */
+ data[0] = intc_get_sense_handle(desc, d, enum_id);
+ if (data[0]) {
+ (d->sense + d->nr_sense)->irq = irq;
+ (d->sense + d->nr_sense)->handle = data[0];
+ d->nr_sense++;
+ }
+
+ /* irq should be disabled by default */
+ d->chip.irq_mask(irq_data);
+
+ intc_set_ack_handle(irq, desc, d, enum_id);
+ intc_set_dist_handle(irq, desc, d, enum_id);
+
+ activate_irq(irq);
+}
+
+static unsigned int __init save_reg(struct intc_desc_int *d,
+ unsigned int cnt,
+ unsigned long value,
+ unsigned int smp)
+{
+ if (value) {
+ value = intc_phys_to_virt(d, value);
+
+ d->reg[cnt] = value;
+#ifdef CONFIG_SMP
+ d->smp[cnt] = smp;
+#endif
+ return 1;
+ }
+
+ return 0;
+}
+
+int __init register_intc_controller(struct intc_desc *desc)
+{
+ unsigned int i, k, smp;
+ struct intc_hw_desc *hw = &desc->hw;
+ struct intc_desc_int *d;
+ struct resource *res;
+
+ pr_info("Registered controller '%s' with %u IRQs\n",
+ desc->name, hw->nr_vectors);
+
+ d = kzalloc(sizeof(*d), GFP_NOWAIT);
+ if (!d)
+ goto err0;
+
+ INIT_LIST_HEAD(&d->list);
+ list_add_tail(&d->list, &intc_list);
+
+ raw_spin_lock_init(&d->lock);
+ INIT_RADIX_TREE(&d->tree, GFP_ATOMIC);
+
+ d->index = nr_intc_controllers;
+
+ if (desc->num_resources) {
+ d->nr_windows = desc->num_resources;
+ d->window = kzalloc(d->nr_windows * sizeof(*d->window),
+ GFP_NOWAIT);
+ if (!d->window)
+ goto err1;
+
+ for (k = 0; k < d->nr_windows; k++) {
+ res = desc->resource + k;
+ WARN_ON(resource_type(res) != IORESOURCE_MEM);
+ d->window[k].phys = res->start;
+ d->window[k].size = resource_size(res);
+ d->window[k].virt = ioremap_nocache(res->start,
+ resource_size(res));
+ if (!d->window[k].virt)
+ goto err2;
+ }
+ }
+
+ d->nr_reg = hw->mask_regs ? hw->nr_mask_regs * 2 : 0;
+#ifdef CONFIG_INTC_BALANCING
+ if (d->nr_reg)
+ d->nr_reg += hw->nr_mask_regs;
+#endif
+ d->nr_reg += hw->prio_regs ? hw->nr_prio_regs * 2 : 0;
+ d->nr_reg += hw->sense_regs ? hw->nr_sense_regs : 0;
+ d->nr_reg += hw->ack_regs ? hw->nr_ack_regs : 0;
+ d->nr_reg += hw->subgroups ? hw->nr_subgroups : 0;
+
+ d->reg = kzalloc(d->nr_reg * sizeof(*d->reg), GFP_NOWAIT);
+ if (!d->reg)
+ goto err2;
+
+#ifdef CONFIG_SMP
+ d->smp = kzalloc(d->nr_reg * sizeof(*d->smp), GFP_NOWAIT);
+ if (!d->smp)
+ goto err3;
+#endif
+ k = 0;
+
+ if (hw->mask_regs) {
+ for (i = 0; i < hw->nr_mask_regs; i++) {
+ smp = IS_SMP(hw->mask_regs[i]);
+ k += save_reg(d, k, hw->mask_regs[i].set_reg, smp);
+ k += save_reg(d, k, hw->mask_regs[i].clr_reg, smp);
+#ifdef CONFIG_INTC_BALANCING
+ k += save_reg(d, k, hw->mask_regs[i].dist_reg, 0);
+#endif
+ }
+ }
+
+ if (hw->prio_regs) {
+ d->prio = kzalloc(hw->nr_vectors * sizeof(*d->prio),
+ GFP_NOWAIT);
+ if (!d->prio)
+ goto err4;
+
+ for (i = 0; i < hw->nr_prio_regs; i++) {
+ smp = IS_SMP(hw->prio_regs[i]);
+ k += save_reg(d, k, hw->prio_regs[i].set_reg, smp);
+ k += save_reg(d, k, hw->prio_regs[i].clr_reg, smp);
+ }
+
+ sort(d->prio, hw->nr_prio_regs, sizeof(*d->prio),
+ intc_handle_int_cmp, NULL);
+ }
+
+ if (hw->sense_regs) {
+ d->sense = kzalloc(hw->nr_vectors * sizeof(*d->sense),
+ GFP_NOWAIT);
+ if (!d->sense)
+ goto err5;
+
+ for (i = 0; i < hw->nr_sense_regs; i++)
+ k += save_reg(d, k, hw->sense_regs[i].reg, 0);
+
+ sort(d->sense, hw->nr_sense_regs, sizeof(*d->sense),
+ intc_handle_int_cmp, NULL);
+ }
+
+ if (hw->subgroups)
+ for (i = 0; i < hw->nr_subgroups; i++)
+ if (hw->subgroups[i].reg)
+ k+= save_reg(d, k, hw->subgroups[i].reg, 0);
+
+ memcpy(&d->chip, &intc_irq_chip, sizeof(struct irq_chip));
+ d->chip.name = desc->name;
+
+ if (hw->ack_regs)
+ for (i = 0; i < hw->nr_ack_regs; i++)
+ k += save_reg(d, k, hw->ack_regs[i].set_reg, 0);
+ else
+ d->chip.irq_mask_ack = d->chip.irq_disable;
+
+ /* disable bits matching force_disable before registering irqs */
+ if (desc->force_disable)
+ intc_enable_disable_enum(desc, d, desc->force_disable, 0);
+
+ /* disable bits matching force_enable before registering irqs */
+ if (desc->force_enable)
+ intc_enable_disable_enum(desc, d, desc->force_enable, 0);
+
+ BUG_ON(k > 256); /* _INTC_ADDR_E() and _INTC_ADDR_D() are 8 bits */
+
+ intc_irq_domain_init(d, hw);
+
+ /* register the vectors one by one */
+ for (i = 0; i < hw->nr_vectors; i++) {
+ struct intc_vect *vect = hw->vectors + i;
+ unsigned int irq = evt2irq(vect->vect);
+ int res;
+
+ if (!vect->enum_id)
+ continue;
+
+ res = irq_create_identity_mapping(d->domain, irq);
+ if (unlikely(res)) {
+ if (res == -EEXIST) {
+ res = irq_domain_associate(d->domain, irq, irq);
+ if (unlikely(res)) {
+ pr_err("domain association failure\n");
+ continue;
+ }
+ } else {
+ pr_err("can't identity map IRQ %d\n", irq);
+ continue;
+ }
+ }
+
+ intc_irq_xlate_set(irq, vect->enum_id, d);
+ intc_register_irq(desc, d, vect->enum_id, irq);
+
+ for (k = i + 1; k < hw->nr_vectors; k++) {
+ struct intc_vect *vect2 = hw->vectors + k;
+ unsigned int irq2 = evt2irq(vect2->vect);
+
+ if (vect->enum_id != vect2->enum_id)
+ continue;
+
+ /*
+ * In the case of multi-evt handling and sparse
+ * IRQ support, each vector still needs to have
+ * its own backing irq_desc.
+ */
+ res = irq_create_identity_mapping(d->domain, irq2);
+ if (unlikely(res)) {
+ if (res == -EEXIST) {
+ res = irq_domain_associate(d->domain,
+ irq2, irq2);
+ if (unlikely(res)) {
+ pr_err("domain association "
+ "failure\n");
+ continue;
+ }
+ } else {
+ pr_err("can't identity map IRQ %d\n",
+ irq);
+ continue;
+ }
+ }
+
+ vect2->enum_id = 0;
+
+ /* redirect this interrupts to the first one */
+ irq_set_chip(irq2, &dummy_irq_chip);
+ irq_set_chained_handler_and_data(irq2,
+ intc_redirect_irq,
+ (void *)irq);
+ }
+ }
+
+ intc_subgroup_init(desc, d);
+
+ /* enable bits matching force_enable after registering irqs */
+ if (desc->force_enable)
+ intc_enable_disable_enum(desc, d, desc->force_enable, 1);
+
+ d->skip_suspend = desc->skip_syscore_suspend;
+
+ nr_intc_controllers++;
+
+ return 0;
+err5:
+ kfree(d->prio);
+err4:
+#ifdef CONFIG_SMP
+ kfree(d->smp);
+err3:
+#endif
+ kfree(d->reg);
+err2:
+ for (k = 0; k < d->nr_windows; k++)
+ if (d->window[k].virt)
+ iounmap(d->window[k].virt);
+
+ kfree(d->window);
+err1:
+ kfree(d);
+err0:
+ pr_err("unable to allocate INTC memory\n");
+
+ return -ENOMEM;
+}
+
+static int intc_suspend(void)
+{
+ struct intc_desc_int *d;
+
+ list_for_each_entry(d, &intc_list, list) {
+ int irq;
+
+ if (d->skip_suspend)
+ continue;
+
+ /* enable wakeup irqs belonging to this intc controller */
+ for_each_active_irq(irq) {
+ struct irq_data *data;
+ struct irq_chip *chip;
+
+ data = irq_get_irq_data(irq);
+ chip = irq_data_get_irq_chip(data);
+ if (chip != &d->chip)
+ continue;
+ if (irqd_is_wakeup_set(data))
+ chip->irq_enable(data);
+ }
+ }
+ return 0;
+}
+
+static void intc_resume(void)
+{
+ struct intc_desc_int *d;
+
+ list_for_each_entry(d, &intc_list, list) {
+ int irq;
+
+ if (d->skip_suspend)
+ continue;
+
+ for_each_active_irq(irq) {
+ struct irq_data *data;
+ struct irq_chip *chip;
+
+ data = irq_get_irq_data(irq);
+ chip = irq_data_get_irq_chip(data);
+ /*
+ * This will catch the redirect and VIRQ cases
+ * due to the dummy_irq_chip being inserted.
+ */
+ if (chip != &d->chip)
+ continue;
+ if (irqd_irq_disabled(data))
+ chip->irq_disable(data);
+ else
+ chip->irq_enable(data);
+ }
+ }
+}
+
+struct syscore_ops intc_syscore_ops = {
+ .suspend = intc_suspend,
+ .resume = intc_resume,
+};
+
+struct bus_type intc_subsys = {
+ .name = "intc",
+ .dev_name = "intc",
+};
+
+static ssize_t
+show_intc_name(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct intc_desc_int *d;
+
+ d = container_of(dev, struct intc_desc_int, dev);
+
+ return sprintf(buf, "%s\n", d->chip.name);
+}
+
+static DEVICE_ATTR(name, S_IRUGO, show_intc_name, NULL);
+
+static int __init register_intc_devs(void)
+{
+ struct intc_desc_int *d;
+ int error;
+
+ register_syscore_ops(&intc_syscore_ops);
+
+ error = subsys_system_register(&intc_subsys, NULL);
+ if (!error) {
+ list_for_each_entry(d, &intc_list, list) {
+ d->dev.id = d->index;
+ d->dev.bus = &intc_subsys;
+ error = device_register(&d->dev);
+ if (error == 0)
+ error = device_create_file(&d->dev,
+ &dev_attr_name);
+ if (error)
+ break;
+ }
+ }
+
+ if (error)
+ pr_err("device registration error\n");
+
+ return error;
+}
+device_initcall(register_intc_devs);
diff --git a/drivers/sh/intc/handle.c b/drivers/sh/intc/handle.c
new file mode 100644
index 0000000..7863a44
--- /dev/null
+++ b/drivers/sh/intc/handle.c
@@ -0,0 +1,306 @@
+/*
+ * Shared interrupt handling code for IPR and INTC2 types of IRQs.
+ *
+ * Copyright (C) 2007, 2008 Magnus Damm
+ * Copyright (C) 2009, 2010 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/spinlock.h>
+#include "internals.h"
+
+static unsigned long ack_handle[INTC_NR_IRQS];
+
+static intc_enum __init intc_grp_id(struct intc_desc *desc,
+ intc_enum enum_id)
+{
+ struct intc_group *g = desc->hw.groups;
+ unsigned int i, j;
+
+ for (i = 0; g && enum_id && i < desc->hw.nr_groups; i++) {
+ g = desc->hw.groups + i;
+
+ for (j = 0; g->enum_ids[j]; j++) {
+ if (g->enum_ids[j] != enum_id)
+ continue;
+
+ return g->enum_id;
+ }
+ }
+
+ return 0;
+}
+
+static unsigned int __init _intc_mask_data(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id,
+ unsigned int *reg_idx,
+ unsigned int *fld_idx)
+{
+ struct intc_mask_reg *mr = desc->hw.mask_regs;
+ unsigned int fn, mode;
+ unsigned long reg_e, reg_d;
+
+ while (mr && enum_id && *reg_idx < desc->hw.nr_mask_regs) {
+ mr = desc->hw.mask_regs + *reg_idx;
+
+ for (; *fld_idx < ARRAY_SIZE(mr->enum_ids); (*fld_idx)++) {
+ if (mr->enum_ids[*fld_idx] != enum_id)
+ continue;
+
+ if (mr->set_reg && mr->clr_reg) {
+ fn = REG_FN_WRITE_BASE;
+ mode = MODE_DUAL_REG;
+ reg_e = mr->clr_reg;
+ reg_d = mr->set_reg;
+ } else {
+ fn = REG_FN_MODIFY_BASE;
+ if (mr->set_reg) {
+ mode = MODE_ENABLE_REG;
+ reg_e = mr->set_reg;
+ reg_d = mr->set_reg;
+ } else {
+ mode = MODE_MASK_REG;
+ reg_e = mr->clr_reg;
+ reg_d = mr->clr_reg;
+ }
+ }
+
+ fn += (mr->reg_width >> 3) - 1;
+ return _INTC_MK(fn, mode,
+ intc_get_reg(d, reg_e),
+ intc_get_reg(d, reg_d),
+ 1,
+ (mr->reg_width - 1) - *fld_idx);
+ }
+
+ *fld_idx = 0;
+ (*reg_idx)++;
+ }
+
+ return 0;
+}
+
+unsigned int __init
+intc_get_mask_handle(struct intc_desc *desc, struct intc_desc_int *d,
+ intc_enum enum_id, int do_grps)
+{
+ unsigned int i = 0;
+ unsigned int j = 0;
+ unsigned int ret;
+
+ ret = _intc_mask_data(desc, d, enum_id, &i, &j);
+ if (ret)
+ return ret;
+
+ if (do_grps)
+ return intc_get_mask_handle(desc, d, intc_grp_id(desc, enum_id), 0);
+
+ return 0;
+}
+
+static unsigned int __init _intc_prio_data(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id,
+ unsigned int *reg_idx,
+ unsigned int *fld_idx)
+{
+ struct intc_prio_reg *pr = desc->hw.prio_regs;
+ unsigned int fn, n, mode, bit;
+ unsigned long reg_e, reg_d;
+
+ while (pr && enum_id && *reg_idx < desc->hw.nr_prio_regs) {
+ pr = desc->hw.prio_regs + *reg_idx;
+
+ for (; *fld_idx < ARRAY_SIZE(pr->enum_ids); (*fld_idx)++) {
+ if (pr->enum_ids[*fld_idx] != enum_id)
+ continue;
+
+ if (pr->set_reg && pr->clr_reg) {
+ fn = REG_FN_WRITE_BASE;
+ mode = MODE_PCLR_REG;
+ reg_e = pr->set_reg;
+ reg_d = pr->clr_reg;
+ } else {
+ fn = REG_FN_MODIFY_BASE;
+ mode = MODE_PRIO_REG;
+ if (!pr->set_reg)
+ BUG();
+ reg_e = pr->set_reg;
+ reg_d = pr->set_reg;
+ }
+
+ fn += (pr->reg_width >> 3) - 1;
+ n = *fld_idx + 1;
+
+ BUG_ON(n * pr->field_width > pr->reg_width);
+
+ bit = pr->reg_width - (n * pr->field_width);
+
+ return _INTC_MK(fn, mode,
+ intc_get_reg(d, reg_e),
+ intc_get_reg(d, reg_d),
+ pr->field_width, bit);
+ }
+
+ *fld_idx = 0;
+ (*reg_idx)++;
+ }
+
+ return 0;
+}
+
+unsigned int __init
+intc_get_prio_handle(struct intc_desc *desc, struct intc_desc_int *d,
+ intc_enum enum_id, int do_grps)
+{
+ unsigned int i = 0;
+ unsigned int j = 0;
+ unsigned int ret;
+
+ ret = _intc_prio_data(desc, d, enum_id, &i, &j);
+ if (ret)
+ return ret;
+
+ if (do_grps)
+ return intc_get_prio_handle(desc, d, intc_grp_id(desc, enum_id), 0);
+
+ return 0;
+}
+
+static unsigned int intc_ack_data(struct intc_desc *desc,
+ struct intc_desc_int *d, intc_enum enum_id)
+{
+ struct intc_mask_reg *mr = desc->hw.ack_regs;
+ unsigned int i, j, fn, mode;
+ unsigned long reg_e, reg_d;
+
+ for (i = 0; mr && enum_id && i < desc->hw.nr_ack_regs; i++) {
+ mr = desc->hw.ack_regs + i;
+
+ for (j = 0; j < ARRAY_SIZE(mr->enum_ids); j++) {
+ if (mr->enum_ids[j] != enum_id)
+ continue;
+
+ fn = REG_FN_MODIFY_BASE;
+ mode = MODE_ENABLE_REG;
+ reg_e = mr->set_reg;
+ reg_d = mr->set_reg;
+
+ fn += (mr->reg_width >> 3) - 1;
+ return _INTC_MK(fn, mode,
+ intc_get_reg(d, reg_e),
+ intc_get_reg(d, reg_d),
+ 1,
+ (mr->reg_width - 1) - j);
+ }
+ }
+
+ return 0;
+}
+
+static void intc_enable_disable(struct intc_desc_int *d,
+ unsigned long handle, int do_enable)
+{
+ unsigned long addr;
+ unsigned int cpu;
+ unsigned long (*fn)(unsigned long, unsigned long,
+ unsigned long (*)(unsigned long, unsigned long,
+ unsigned long),
+ unsigned int);
+
+ if (do_enable) {
+ for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_E(handle)); cpu++) {
+ addr = INTC_REG(d, _INTC_ADDR_E(handle), cpu);
+ fn = intc_enable_noprio_fns[_INTC_MODE(handle)];
+ fn(addr, handle, intc_reg_fns[_INTC_FN(handle)], 0);
+ }
+ } else {
+ for (cpu = 0; cpu < SMP_NR(d, _INTC_ADDR_D(handle)); cpu++) {
+ addr = INTC_REG(d, _INTC_ADDR_D(handle), cpu);
+ fn = intc_disable_fns[_INTC_MODE(handle)];
+ fn(addr, handle, intc_reg_fns[_INTC_FN(handle)], 0);
+ }
+ }
+}
+
+void __init intc_enable_disable_enum(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id, int enable)
+{
+ unsigned int i, j, data;
+
+ /* go through and enable/disable all mask bits */
+ i = j = 0;
+ do {
+ data = _intc_mask_data(desc, d, enum_id, &i, &j);
+ if (data)
+ intc_enable_disable(d, data, enable);
+ j++;
+ } while (data);
+
+ /* go through and enable/disable all priority fields */
+ i = j = 0;
+ do {
+ data = _intc_prio_data(desc, d, enum_id, &i, &j);
+ if (data)
+ intc_enable_disable(d, data, enable);
+
+ j++;
+ } while (data);
+}
+
+unsigned int __init
+intc_get_sense_handle(struct intc_desc *desc, struct intc_desc_int *d,
+ intc_enum enum_id)
+{
+ struct intc_sense_reg *sr = desc->hw.sense_regs;
+ unsigned int i, j, fn, bit;
+
+ for (i = 0; sr && enum_id && i < desc->hw.nr_sense_regs; i++) {
+ sr = desc->hw.sense_regs + i;
+
+ for (j = 0; j < ARRAY_SIZE(sr->enum_ids); j++) {
+ if (sr->enum_ids[j] != enum_id)
+ continue;
+
+ fn = REG_FN_MODIFY_BASE;
+ fn += (sr->reg_width >> 3) - 1;
+
+ BUG_ON((j + 1) * sr->field_width > sr->reg_width);
+
+ bit = sr->reg_width - ((j + 1) * sr->field_width);
+
+ return _INTC_MK(fn, 0, intc_get_reg(d, sr->reg),
+ 0, sr->field_width, bit);
+ }
+ }
+
+ return 0;
+}
+
+
+void intc_set_ack_handle(unsigned int irq, struct intc_desc *desc,
+ struct intc_desc_int *d, intc_enum id)
+{
+ unsigned long flags;
+
+ /*
+ * Nothing to do for this IRQ.
+ */
+ if (!desc->hw.ack_regs)
+ return;
+
+ raw_spin_lock_irqsave(&intc_big_lock, flags);
+ ack_handle[irq] = intc_ack_data(desc, d, id);
+ raw_spin_unlock_irqrestore(&intc_big_lock, flags);
+}
+
+unsigned long intc_get_ack_handle(unsigned int irq)
+{
+ return ack_handle[irq];
+}
diff --git a/drivers/sh/intc/internals.h b/drivers/sh/intc/internals.h
new file mode 100644
index 0000000..6ce7f0d
--- /dev/null
+++ b/drivers/sh/intc/internals.h
@@ -0,0 +1,190 @@
+#include <linux/sh_intc.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/list.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/radix-tree.h>
+#include <linux/device.h>
+
+#define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \
+ ((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \
+ ((addr_e) << 16) | ((addr_d << 24)))
+
+#define _INTC_SHIFT(h) (h & 0x1f)
+#define _INTC_WIDTH(h) ((h >> 5) & 0xf)
+#define _INTC_FN(h) ((h >> 9) & 0xf)
+#define _INTC_MODE(h) ((h >> 13) & 0x7)
+#define _INTC_ADDR_E(h) ((h >> 16) & 0xff)
+#define _INTC_ADDR_D(h) ((h >> 24) & 0xff)
+
+#ifdef CONFIG_SMP
+#define IS_SMP(x) (x.smp)
+#define INTC_REG(d, x, c) (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))
+#define SMP_NR(d, x) ((d->smp[(x)] >> 8) ? (d->smp[(x)] >> 8) : 1)
+#else
+#define IS_SMP(x) 0
+#define INTC_REG(d, x, c) (d->reg[(x)])
+#define SMP_NR(d, x) 1
+#endif
+
+struct intc_handle_int {
+ unsigned int irq;
+ unsigned long handle;
+};
+
+struct intc_window {
+ phys_addr_t phys;
+ void __iomem *virt;
+ unsigned long size;
+};
+
+struct intc_map_entry {
+ intc_enum enum_id;
+ struct intc_desc_int *desc;
+};
+
+struct intc_subgroup_entry {
+ unsigned int pirq;
+ intc_enum enum_id;
+ unsigned long handle;
+};
+
+struct intc_desc_int {
+ struct list_head list;
+ struct device dev;
+ struct radix_tree_root tree;
+ raw_spinlock_t lock;
+ unsigned int index;
+ unsigned long *reg;
+#ifdef CONFIG_SMP
+ unsigned long *smp;
+#endif
+ unsigned int nr_reg;
+ struct intc_handle_int *prio;
+ unsigned int nr_prio;
+ struct intc_handle_int *sense;
+ unsigned int nr_sense;
+ struct intc_window *window;
+ unsigned int nr_windows;
+ struct irq_domain *domain;
+ struct irq_chip chip;
+ bool skip_suspend;
+};
+
+
+enum {
+ REG_FN_ERR = 0,
+ REG_FN_TEST_BASE = 1,
+ REG_FN_WRITE_BASE = 5,
+ REG_FN_MODIFY_BASE = 9
+};
+
+enum { MODE_ENABLE_REG = 0, /* Bit(s) set -> interrupt enabled */
+ MODE_MASK_REG, /* Bit(s) set -> interrupt disabled */
+ MODE_DUAL_REG, /* Two registers, set bit to enable / disable */
+ MODE_PRIO_REG, /* Priority value written to enable interrupt */
+ MODE_PCLR_REG, /* Above plus all bits set to disable interrupt */
+};
+
+static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
+{
+ struct irq_chip *chip = irq_get_chip(irq);
+
+ return container_of(chip, struct intc_desc_int, chip);
+}
+
+/*
+ * Grumble.
+ */
+static inline void activate_irq(int irq)
+{
+ irq_modify_status(irq, IRQ_NOREQUEST, IRQ_NOPROBE);
+}
+
+static inline int intc_handle_int_cmp(const void *a, const void *b)
+{
+ const struct intc_handle_int *_a = a;
+ const struct intc_handle_int *_b = b;
+
+ return _a->irq - _b->irq;
+}
+
+/* access.c */
+extern unsigned long
+(*intc_reg_fns[])(unsigned long addr, unsigned long h, unsigned long data);
+
+extern unsigned long
+(*intc_enable_fns[])(unsigned long addr, unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long, unsigned long),
+ unsigned int irq);
+extern unsigned long
+(*intc_disable_fns[])(unsigned long addr, unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long, unsigned long),
+ unsigned int irq);
+extern unsigned long
+(*intc_enable_noprio_fns[])(unsigned long addr, unsigned long handle,
+ unsigned long (*fn)(unsigned long,
+ unsigned long, unsigned long),
+ unsigned int irq);
+
+unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address);
+unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address);
+unsigned int intc_set_field_from_handle(unsigned int value,
+ unsigned int field_value,
+ unsigned int handle);
+unsigned long intc_get_field_from_handle(unsigned int value,
+ unsigned int handle);
+
+/* balancing.c */
+#ifdef CONFIG_INTC_BALANCING
+void intc_balancing_enable(unsigned int irq);
+void intc_balancing_disable(unsigned int irq);
+void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
+ struct intc_desc_int *d, intc_enum id);
+#else
+static inline void intc_balancing_enable(unsigned int irq) { }
+static inline void intc_balancing_disable(unsigned int irq) { }
+static inline void
+intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,
+ struct intc_desc_int *d, intc_enum id) { }
+#endif
+
+/* chip.c */
+extern struct irq_chip intc_irq_chip;
+void _intc_enable(struct irq_data *data, unsigned long handle);
+
+/* core.c */
+extern struct list_head intc_list;
+extern raw_spinlock_t intc_big_lock;
+extern struct bus_type intc_subsys;
+
+unsigned int intc_get_dfl_prio_level(void);
+unsigned int intc_get_prio_level(unsigned int irq);
+void intc_set_prio_level(unsigned int irq, unsigned int level);
+
+/* handle.c */
+unsigned int intc_get_mask_handle(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id, int do_grps);
+unsigned int intc_get_prio_handle(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id, int do_grps);
+unsigned int intc_get_sense_handle(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ intc_enum enum_id);
+void intc_set_ack_handle(unsigned int irq, struct intc_desc *desc,
+ struct intc_desc_int *d, intc_enum id);
+unsigned long intc_get_ack_handle(unsigned int irq);
+void intc_enable_disable_enum(struct intc_desc *desc, struct intc_desc_int *d,
+ intc_enum enum_id, int enable);
+
+/* irqdomain.c */
+void intc_irq_domain_init(struct intc_desc_int *d, struct intc_hw_desc *hw);
+
+/* virq.c */
+void intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d);
+void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d);
+struct intc_map_entry *intc_irq_xlate_get(unsigned int irq);
diff --git a/drivers/sh/intc/irqdomain.c b/drivers/sh/intc/irqdomain.c
new file mode 100644
index 0000000..3968f1c
--- /dev/null
+++ b/drivers/sh/intc/irqdomain.c
@@ -0,0 +1,68 @@
+/*
+ * IRQ domain support for SH INTC subsystem
+ *
+ * Copyright (C) 2012 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#define pr_fmt(fmt) "intc: " fmt
+
+#include <linux/irqdomain.h>
+#include <linux/sh_intc.h>
+#include <linux/export.h>
+#include "internals.h"
+
+/**
+ * intc_irq_domain_evt_xlate() - Generic xlate for vectored IRQs.
+ *
+ * This takes care of exception vector to hwirq translation through
+ * by way of evt2irq() translation.
+ *
+ * Note: For platforms that use a flat vector space without INTEVT this
+ * basically just mimics irq_domain_xlate_onecell() by way of a nopped
+ * out evt2irq() implementation.
+ */
+static int intc_evt_xlate(struct irq_domain *d, struct device_node *ctrlr,
+ const u32 *intspec, unsigned int intsize,
+ unsigned long *out_hwirq, unsigned int *out_type)
+{
+ if (WARN_ON(intsize < 1))
+ return -EINVAL;
+
+ *out_hwirq = evt2irq(intspec[0]);
+ *out_type = IRQ_TYPE_NONE;
+
+ return 0;
+}
+
+static const struct irq_domain_ops intc_evt_ops = {
+ .xlate = intc_evt_xlate,
+};
+
+void __init intc_irq_domain_init(struct intc_desc_int *d,
+ struct intc_hw_desc *hw)
+{
+ unsigned int irq_base, irq_end;
+
+ /*
+ * Quick linear revmap check
+ */
+ irq_base = evt2irq(hw->vectors[0].vect);
+ irq_end = evt2irq(hw->vectors[hw->nr_vectors - 1].vect);
+
+ /*
+ * Linear domains have a hard-wired assertion that IRQs start at
+ * 0 in order to make some performance optimizations. Lamely
+ * restrict the linear case to these conditions here, taking the
+ * tree penalty for linear cases with non-zero hwirq bases.
+ */
+ if (irq_base == 0 && irq_end == (irq_base + hw->nr_vectors - 1))
+ d->domain = irq_domain_add_linear(NULL, hw->nr_vectors,
+ &intc_evt_ops, NULL);
+ else
+ d->domain = irq_domain_add_tree(NULL, &intc_evt_ops, NULL);
+
+ BUG_ON(!d->domain);
+}
diff --git a/drivers/sh/intc/userimask.c b/drivers/sh/intc/userimask.c
new file mode 100644
index 0000000..e649cea
--- /dev/null
+++ b/drivers/sh/intc/userimask.c
@@ -0,0 +1,84 @@
+/*
+ * Support for hardware-assisted userspace interrupt masking.
+ *
+ * Copyright (C) 2010 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#define pr_fmt(fmt) "intc: " fmt
+
+#include <linux/errno.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/stat.h>
+#include <asm/sizes.h>
+#include "internals.h"
+
+static void __iomem *uimask;
+
+static ssize_t
+show_intc_userimask(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", (__raw_readl(uimask) >> 4) & 0xf);
+}
+
+static ssize_t
+store_intc_userimask(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ unsigned long level;
+
+ level = simple_strtoul(buf, NULL, 10);
+
+ /*
+ * Minimal acceptable IRQ levels are in the 2 - 16 range, but
+ * these are chomped so as to not interfere with normal IRQs.
+ *
+ * Level 1 is a special case on some CPUs in that it's not
+ * directly settable, but given that USERIMASK cuts off below a
+ * certain level, we don't care about this limitation here.
+ * Level 0 on the other hand equates to user masking disabled.
+ *
+ * We use the default priority level as a cut off so that only
+ * special case opt-in IRQs can be mangled.
+ */
+ if (level >= intc_get_dfl_prio_level())
+ return -EINVAL;
+
+ __raw_writel(0xa5 << 24 | level << 4, uimask);
+
+ return count;
+}
+
+static DEVICE_ATTR(userimask, S_IRUSR | S_IWUSR,
+ show_intc_userimask, store_intc_userimask);
+
+
+static int __init userimask_sysdev_init(void)
+{
+ if (unlikely(!uimask))
+ return -ENXIO;
+
+ return device_create_file(intc_subsys.dev_root, &dev_attr_userimask);
+}
+late_initcall(userimask_sysdev_init);
+
+int register_intc_userimask(unsigned long addr)
+{
+ if (unlikely(uimask))
+ return -EBUSY;
+
+ uimask = ioremap_nocache(addr, SZ_4K);
+ if (unlikely(!uimask))
+ return -ENOMEM;
+
+ pr_info("userimask support registered for levels 0 -> %d\n",
+ intc_get_dfl_prio_level() - 1);
+
+ return 0;
+}
diff --git a/drivers/sh/intc/virq-debugfs.c b/drivers/sh/intc/virq-debugfs.c
new file mode 100644
index 0000000..9e62ba9
--- /dev/null
+++ b/drivers/sh/intc/virq-debugfs.c
@@ -0,0 +1,64 @@
+/*
+ * Support for virtual IRQ subgroups debugfs mapping.
+ *
+ * Copyright (C) 2010 Paul Mundt
+ *
+ * Modelled after arch/powerpc/kernel/irq.c.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/seq_file.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/debugfs.h>
+#include "internals.h"
+
+static int intc_irq_xlate_debug(struct seq_file *m, void *priv)
+{
+ int i;
+
+ seq_printf(m, "%-5s %-7s %-15s\n", "irq", "enum", "chip name");
+
+ for (i = 1; i < nr_irqs; i++) {
+ struct intc_map_entry *entry = intc_irq_xlate_get(i);
+ struct intc_desc_int *desc = entry->desc;
+
+ if (!desc)
+ continue;
+
+ seq_printf(m, "%5d ", i);
+ seq_printf(m, "0x%05x ", entry->enum_id);
+ seq_printf(m, "%-15s\n", desc->chip.name);
+ }
+
+ return 0;
+}
+
+static int intc_irq_xlate_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, intc_irq_xlate_debug, inode->i_private);
+}
+
+static const struct file_operations intc_irq_xlate_fops = {
+ .open = intc_irq_xlate_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init intc_irq_xlate_init(void)
+{
+ /*
+ * XXX.. use arch_debugfs_dir here when all of the intc users are
+ * converted.
+ */
+ if (debugfs_create_file("intc_irq_xlate", S_IRUGO, NULL, NULL,
+ &intc_irq_xlate_fops) == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+fs_initcall(intc_irq_xlate_init);
diff --git a/drivers/sh/intc/virq.c b/drivers/sh/intc/virq.c
new file mode 100644
index 0000000..e789962
--- /dev/null
+++ b/drivers/sh/intc/virq.c
@@ -0,0 +1,271 @@
+/*
+ * Support for virtual IRQ subgroups.
+ *
+ * Copyright (C) 2010 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#define pr_fmt(fmt) "intc: " fmt
+
+#include <linux/slab.h>
+#include <linux/irq.h>
+#include <linux/list.h>
+#include <linux/radix-tree.h>
+#include <linux/spinlock.h>
+#include <linux/export.h>
+#include "internals.h"
+
+static struct intc_map_entry intc_irq_xlate[INTC_NR_IRQS];
+
+struct intc_virq_list {
+ unsigned int irq;
+ struct intc_virq_list *next;
+};
+
+#define for_each_virq(entry, head) \
+ for (entry = head; entry; entry = entry->next)
+
+/*
+ * Tags for the radix tree
+ */
+#define INTC_TAG_VIRQ_NEEDS_ALLOC 0
+
+void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d)
+{
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&intc_big_lock, flags);
+ intc_irq_xlate[irq].enum_id = id;
+ intc_irq_xlate[irq].desc = d;
+ raw_spin_unlock_irqrestore(&intc_big_lock, flags);
+}
+
+struct intc_map_entry *intc_irq_xlate_get(unsigned int irq)
+{
+ return intc_irq_xlate + irq;
+}
+
+int intc_irq_lookup(const char *chipname, intc_enum enum_id)
+{
+ struct intc_map_entry *ptr;
+ struct intc_desc_int *d;
+ int irq = -1;
+
+ list_for_each_entry(d, &intc_list, list) {
+ int tagged;
+
+ if (strcmp(d->chip.name, chipname) != 0)
+ continue;
+
+ /*
+ * Catch early lookups for subgroup VIRQs that have not
+ * yet been allocated an IRQ. This already includes a
+ * fast-path out if the tree is untagged, so there is no
+ * need to explicitly test the root tree.
+ */
+ tagged = radix_tree_tag_get(&d->tree, enum_id,
+ INTC_TAG_VIRQ_NEEDS_ALLOC);
+ if (unlikely(tagged))
+ break;
+
+ ptr = radix_tree_lookup(&d->tree, enum_id);
+ if (ptr) {
+ irq = ptr - intc_irq_xlate;
+ break;
+ }
+ }
+
+ return irq;
+}
+EXPORT_SYMBOL_GPL(intc_irq_lookup);
+
+static int add_virq_to_pirq(unsigned int irq, unsigned int virq)
+{
+ struct intc_virq_list *entry;
+ struct intc_virq_list **last = NULL;
+
+ /* scan for duplicates */
+ for_each_virq(entry, irq_get_handler_data(irq)) {
+ if (entry->irq == virq)
+ return 0;
+ last = &entry->next;
+ }
+
+ entry = kzalloc(sizeof(struct intc_virq_list), GFP_ATOMIC);
+ if (!entry) {
+ pr_err("can't allocate VIRQ mapping for %d\n", virq);
+ return -ENOMEM;
+ }
+
+ entry->irq = virq;
+
+ if (last)
+ *last = entry;
+ else
+ irq_set_handler_data(irq, entry);
+
+ return 0;
+}
+
+static void intc_virq_handler(struct irq_desc *desc)
+{
+ unsigned int irq = irq_desc_get_irq(desc);
+ struct irq_data *data = irq_desc_get_irq_data(desc);
+ struct irq_chip *chip = irq_data_get_irq_chip(data);
+ struct intc_virq_list *entry, *vlist = irq_data_get_irq_handler_data(data);
+ struct intc_desc_int *d = get_intc_desc(irq);
+
+ chip->irq_mask_ack(data);
+
+ for_each_virq(entry, vlist) {
+ unsigned long addr, handle;
+ struct irq_desc *vdesc = irq_to_desc(entry->irq);
+
+ if (vdesc) {
+ handle = (unsigned long)irq_desc_get_handler_data(vdesc);
+ addr = INTC_REG(d, _INTC_ADDR_E(handle), 0);
+ if (intc_reg_fns[_INTC_FN(handle)](addr, handle, 0))
+ generic_handle_irq_desc(vdesc);
+ }
+ }
+
+ chip->irq_unmask(data);
+}
+
+static unsigned long __init intc_subgroup_data(struct intc_subgroup *subgroup,
+ struct intc_desc_int *d,
+ unsigned int index)
+{
+ unsigned int fn = REG_FN_TEST_BASE + (subgroup->reg_width >> 3) - 1;
+
+ return _INTC_MK(fn, MODE_ENABLE_REG, intc_get_reg(d, subgroup->reg),
+ 0, 1, (subgroup->reg_width - 1) - index);
+}
+
+static void __init intc_subgroup_init_one(struct intc_desc *desc,
+ struct intc_desc_int *d,
+ struct intc_subgroup *subgroup)
+{
+ struct intc_map_entry *mapped;
+ unsigned int pirq;
+ unsigned long flags;
+ int i;
+
+ mapped = radix_tree_lookup(&d->tree, subgroup->parent_id);
+ if (!mapped) {
+ WARN_ON(1);
+ return;
+ }
+
+ pirq = mapped - intc_irq_xlate;
+
+ raw_spin_lock_irqsave(&d->lock, flags);
+
+ for (i = 0; i < ARRAY_SIZE(subgroup->enum_ids); i++) {
+ struct intc_subgroup_entry *entry;
+ int err;
+
+ if (!subgroup->enum_ids[i])
+ continue;
+
+ entry = kmalloc(sizeof(*entry), GFP_NOWAIT);
+ if (!entry)
+ break;
+
+ entry->pirq = pirq;
+ entry->enum_id = subgroup->enum_ids[i];
+ entry->handle = intc_subgroup_data(subgroup, d, i);
+
+ err = radix_tree_insert(&d->tree, entry->enum_id, entry);
+ if (unlikely(err < 0))
+ break;
+
+ radix_tree_tag_set(&d->tree, entry->enum_id,
+ INTC_TAG_VIRQ_NEEDS_ALLOC);
+ }
+
+ raw_spin_unlock_irqrestore(&d->lock, flags);
+}
+
+void __init intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d)
+{
+ int i;
+
+ if (!desc->hw.subgroups)
+ return;
+
+ for (i = 0; i < desc->hw.nr_subgroups; i++)
+ intc_subgroup_init_one(desc, d, desc->hw.subgroups + i);
+}
+
+static void __init intc_subgroup_map(struct intc_desc_int *d)
+{
+ struct intc_subgroup_entry *entries[32];
+ unsigned long flags;
+ unsigned int nr_found;
+ int i;
+
+ raw_spin_lock_irqsave(&d->lock, flags);
+
+restart:
+ nr_found = radix_tree_gang_lookup_tag_slot(&d->tree,
+ (void ***)entries, 0, ARRAY_SIZE(entries),
+ INTC_TAG_VIRQ_NEEDS_ALLOC);
+
+ for (i = 0; i < nr_found; i++) {
+ struct intc_subgroup_entry *entry;
+ int irq;
+
+ entry = radix_tree_deref_slot((void **)entries[i]);
+ if (unlikely(!entry))
+ continue;
+ if (radix_tree_deref_retry(entry))
+ goto restart;
+
+ irq = irq_alloc_desc(numa_node_id());
+ if (unlikely(irq < 0)) {
+ pr_err("no more free IRQs, bailing..\n");
+ break;
+ }
+
+ activate_irq(irq);
+
+ pr_info("Setting up a chained VIRQ from %d -> %d\n",
+ irq, entry->pirq);
+
+ intc_irq_xlate_set(irq, entry->enum_id, d);
+
+ irq_set_chip_and_handler_name(irq, irq_get_chip(entry->pirq),
+ handle_simple_irq, "virq");
+ irq_set_chip_data(irq, irq_get_chip_data(entry->pirq));
+
+ irq_set_handler_data(irq, (void *)entry->handle);
+
+ /*
+ * Set the virtual IRQ as non-threadable.
+ */
+ irq_set_nothread(irq);
+
+ /* Set handler data before installing the handler */
+ add_virq_to_pirq(entry->pirq, irq);
+ irq_set_chained_handler(entry->pirq, intc_virq_handler);
+
+ radix_tree_tag_clear(&d->tree, entry->enum_id,
+ INTC_TAG_VIRQ_NEEDS_ALLOC);
+ radix_tree_replace_slot((void **)entries[i],
+ &intc_irq_xlate[irq]);
+ }
+
+ raw_spin_unlock_irqrestore(&d->lock, flags);
+}
+
+void __init intc_finalize(void)
+{
+ struct intc_desc_int *d;
+
+ list_for_each_entry(d, &intc_list, list)
+ if (radix_tree_tagged(&d->tree, INTC_TAG_VIRQ_NEEDS_ALLOC))
+ intc_subgroup_map(d);
+}