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-rw-r--r--arch/openrisc/Kconfig1
-rw-r--r--arch/openrisc/Makefile2
-rw-r--r--arch/openrisc/include/asm/Kbuild3
-rw-r--r--arch/openrisc/include/asm/dma-mapping.h147
-rw-r--r--arch/openrisc/include/asm/elf.h12
-rw-r--r--arch/openrisc/include/asm/ptrace.h6
-rw-r--r--arch/openrisc/kernel/Makefile2
-rw-r--r--arch/openrisc/kernel/dma.c109
-rw-r--r--arch/openrisc/kernel/entry.S8
-rw-r--r--arch/openrisc/kernel/init_task.c42
-rw-r--r--arch/openrisc/kernel/irq.c83
-rw-r--r--arch/openrisc/mm/fault.c32
12 files changed, 201 insertions, 246 deletions
diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index 66dff2046987..297bd38f7c5d 100644
--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig
@@ -7,6 +7,7 @@ config OPENRISC
def_bool y
select OF
select OF_EARLY_FLATTREE
+ select IRQ_DOMAIN
select HAVE_MEMBLOCK
select ARCH_WANT_OPTIONAL_GPIOLIB
select HAVE_ARCH_TRACEHOOK
diff --git a/arch/openrisc/Makefile b/arch/openrisc/Makefile
index 158ae4c0dc6c..966886c8daf5 100644
--- a/arch/openrisc/Makefile
+++ b/arch/openrisc/Makefile
@@ -38,7 +38,7 @@ else
KBUILD_CFLAGS += $(call cc-option,-msoft-div)
endif
-head-y := arch/openrisc/kernel/head.o arch/openrisc/kernel/init_task.o
+head-y := arch/openrisc/kernel/head.o
core-y += arch/openrisc/lib/ \
arch/openrisc/kernel/ \
diff --git a/arch/openrisc/include/asm/Kbuild b/arch/openrisc/include/asm/Kbuild
index dcea5a0308ae..c936483bc8e2 100644
--- a/arch/openrisc/include/asm/Kbuild
+++ b/arch/openrisc/include/asm/Kbuild
@@ -1,6 +1,7 @@
include include/asm-generic/Kbuild.asm
-header-y += spr_defs.h
+header-y += elf.h
+header-y += ucontext.h
generic-y += atomic.h
generic-y += auxvec.h
diff --git a/arch/openrisc/include/asm/dma-mapping.h b/arch/openrisc/include/asm/dma-mapping.h
index b206ba4608b2..fab8628e1b6e 100644
--- a/arch/openrisc/include/asm/dma-mapping.h
+++ b/arch/openrisc/include/asm/dma-mapping.h
@@ -20,150 +20,71 @@
/*
* See Documentation/DMA-API-HOWTO.txt and
* Documentation/DMA-API.txt for documentation.
- *
- * This file is written with the intention of eventually moving over
- * to largely using asm-generic/dma-mapping-common.h in its place.
*/
#include <linux/dma-debug.h>
#include <asm-generic/dma-coherent.h>
#include <linux/kmemcheck.h>
+#include <linux/dma-mapping.h>
#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
+extern struct dma_map_ops or1k_dma_map_ops;
-#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
-#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-
-void *or1k_dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag);
-void or1k_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle);
-dma_addr_t or1k_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- struct dma_attrs *attrs);
-void or1k_unmap_page(struct device *dev, dma_addr_t dma_handle,
- size_t size, enum dma_data_direction dir,
- struct dma_attrs *attrs);
-int or1k_map_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction dir,
- struct dma_attrs *attrs);
-void or1k_unmap_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction dir,
- struct dma_attrs *attrs);
-void or1k_sync_single_for_cpu(struct device *dev,
- dma_addr_t dma_handle, size_t size,
- enum dma_data_direction dir);
-void or1k_sync_single_for_device(struct device *dev,
- dma_addr_t dma_handle, size_t size,
- enum dma_data_direction dir);
-
-static inline void *dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag)
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
{
- void *memory;
-
- memory = or1k_dma_alloc_coherent(dev, size, dma_handle, flag);
-
- debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
- return memory;
+ return &or1k_dma_map_ops;
}
-static inline void dma_free_coherent(struct device *dev, size_t size,
- void *cpu_addr, dma_addr_t dma_handle)
-{
- debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
- or1k_dma_free_coherent(dev, size, cpu_addr, dma_handle);
-}
+#include <asm-generic/dma-mapping-common.h>
-static inline dma_addr_t dma_map_single(struct device *dev, void *ptr,
- size_t size,
- enum dma_data_direction dir)
-{
- dma_addr_t addr;
-
- kmemcheck_mark_initialized(ptr, size);
- BUG_ON(!valid_dma_direction(dir));
- addr = or1k_map_page(dev, virt_to_page(ptr),
- (unsigned long)ptr & ~PAGE_MASK, size,
- dir, NULL);
- debug_dma_map_page(dev, virt_to_page(ptr),
- (unsigned long)ptr & ~PAGE_MASK, size,
- dir, addr, true);
- return addr;
-}
+#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL)
-static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
- size_t size,
- enum dma_data_direction dir)
+static inline void *dma_alloc_attrs(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp,
+ struct dma_attrs *attrs)
{
- BUG_ON(!valid_dma_direction(dir));
- or1k_unmap_page(dev, addr, size, dir, NULL);
- debug_dma_unmap_page(dev, addr, size, dir, true);
-}
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ void *memory;
-static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction dir)
-{
- int i, ents;
- struct scatterlist *s;
+ memory = ops->alloc(dev, size, dma_handle, gfp, attrs);
- for_each_sg(sg, s, nents, i)
- kmemcheck_mark_initialized(sg_virt(s), s->length);
- BUG_ON(!valid_dma_direction(dir));
- ents = or1k_map_sg(dev, sg, nents, dir, NULL);
- debug_dma_map_sg(dev, sg, nents, ents, dir);
+ debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
- return ents;
+ return memory;
}
-static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction dir)
-{
- BUG_ON(!valid_dma_direction(dir));
- debug_dma_unmap_sg(dev, sg, nents, dir);
- or1k_unmap_sg(dev, sg, nents, dir, NULL);
-}
+#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
-static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
- size_t offset, size_t size,
- enum dma_data_direction dir)
+static inline void dma_free_attrs(struct device *dev, size_t size,
+ void *cpu_addr, dma_addr_t dma_handle,
+ struct dma_attrs *attrs)
{
- dma_addr_t addr;
+ struct dma_map_ops *ops = get_dma_ops(dev);
- kmemcheck_mark_initialized(page_address(page) + offset, size);
- BUG_ON(!valid_dma_direction(dir));
- addr = or1k_map_page(dev, page, offset, size, dir, NULL);
- debug_dma_map_page(dev, page, offset, size, dir, addr, false);
+ debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
- return addr;
+ ops->free(dev, size, cpu_addr, dma_handle, attrs);
}
-static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
- size_t size, enum dma_data_direction dir)
+static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp)
{
- BUG_ON(!valid_dma_direction(dir));
- or1k_unmap_page(dev, addr, size, dir, NULL);
- debug_dma_unmap_page(dev, addr, size, dir, true);
-}
+ struct dma_attrs attrs;
-static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
- size_t size,
- enum dma_data_direction dir)
-{
- BUG_ON(!valid_dma_direction(dir));
- or1k_sync_single_for_cpu(dev, addr, size, dir);
- debug_dma_sync_single_for_cpu(dev, addr, size, dir);
+ dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
+
+ return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
}
-static inline void dma_sync_single_for_device(struct device *dev,
- dma_addr_t addr, size_t size,
- enum dma_data_direction dir)
+static inline void dma_free_noncoherent(struct device *dev, size_t size,
+ void *cpu_addr, dma_addr_t dma_handle)
{
- BUG_ON(!valid_dma_direction(dir));
- or1k_sync_single_for_device(dev, addr, size, dir);
- debug_dma_sync_single_for_device(dev, addr, size, dir);
+ struct dma_attrs attrs;
+
+ dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
+
+ dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
}
static inline int dma_supported(struct device *dev, u64 dma_mask)
diff --git a/arch/openrisc/include/asm/elf.h b/arch/openrisc/include/asm/elf.h
index 2ce603bbfdd3..a8fe2c513070 100644
--- a/arch/openrisc/include/asm/elf.h
+++ b/arch/openrisc/include/asm/elf.h
@@ -20,11 +20,17 @@
#define __ASM_OPENRISC_ELF_H
/*
+ * This files is partially exported to userspace. This allows us to keep
+ * the ELF bits in one place which should assist in keeping the kernel and
+ * userspace in sync.
+ */
+
+/*
* ELF register definitions..
*/
-#include <linux/types.h>
-#include <linux/ptrace.h>
+/* for struct user_regs_struct definition */
+#include <asm/ptrace.h>
/* The OR1K relocation types... not all relevant for module loader */
#define R_OR32_NONE 0
@@ -62,6 +68,8 @@ typedef unsigned long elf_fpregset_t;
#ifdef __KERNEL__
+#include <linux/types.h>
+
/*
* This is used to ensure we don't load something for the wrong architecture.
*/
diff --git a/arch/openrisc/include/asm/ptrace.h b/arch/openrisc/include/asm/ptrace.h
index 4651a737591d..8555c0c3d4d7 100644
--- a/arch/openrisc/include/asm/ptrace.h
+++ b/arch/openrisc/include/asm/ptrace.h
@@ -19,8 +19,6 @@
#ifndef __ASM_OPENRISC_PTRACE_H
#define __ASM_OPENRISC_PTRACE_H
-#include <asm/spr_defs.h>
-
#ifndef __ASSEMBLY__
/*
* This is the layout of the regset returned by the GETREGSET ptrace call
@@ -30,13 +28,13 @@ struct user_regs_struct {
unsigned long gpr[32];
unsigned long pc;
unsigned long sr;
- unsigned long pad1;
- unsigned long pad2;
};
#endif
#ifdef __KERNEL__
+#include <asm/spr_defs.h>
+
/*
* Make kernel PTrace/register structures opaque to userspace... userspace can
* access thread state via the regset mechanism. This allows us a bit of
diff --git a/arch/openrisc/kernel/Makefile b/arch/openrisc/kernel/Makefile
index 9a4c2706d795..e1ee0fa2bbda 100644
--- a/arch/openrisc/kernel/Makefile
+++ b/arch/openrisc/kernel/Makefile
@@ -2,7 +2,7 @@
# Makefile for the linux kernel.
#
-extra-y := head.o vmlinux.lds init_task.o
+extra-y := head.o vmlinux.lds
obj-y := setup.o idle.o or32_ksyms.o process.o dma.o \
traps.o time.o irq.o entry.o ptrace.o signal.o sys_or32.o \
diff --git a/arch/openrisc/kernel/dma.c b/arch/openrisc/kernel/dma.c
index f1c8ee2895d0..0b77ddb1ee07 100644
--- a/arch/openrisc/kernel/dma.c
+++ b/arch/openrisc/kernel/dma.c
@@ -21,13 +21,16 @@
#include <linux/dma-mapping.h>
#include <linux/dma-debug.h>
+#include <linux/export.h>
+#include <linux/dma-attrs.h>
#include <asm/cpuinfo.h>
#include <asm/spr_defs.h>
#include <asm/tlbflush.h>
-static int page_set_nocache(pte_t *pte, unsigned long addr,
- unsigned long next, struct mm_walk *walk)
+static int
+page_set_nocache(pte_t *pte, unsigned long addr,
+ unsigned long next, struct mm_walk *walk)
{
unsigned long cl;
@@ -46,8 +49,9 @@ static int page_set_nocache(pte_t *pte, unsigned long addr,
return 0;
}
-static int page_clear_nocache(pte_t *pte, unsigned long addr,
- unsigned long next, struct mm_walk *walk)
+static int
+page_clear_nocache(pte_t *pte, unsigned long addr,
+ unsigned long next, struct mm_walk *walk)
{
pte_val(*pte) &= ~_PAGE_CI;
@@ -67,9 +71,19 @@ static int page_clear_nocache(pte_t *pte, unsigned long addr,
* cache-inhibit bit on those pages, and makes sure that the pages are
* flushed out of the cache before they are used.
*
+ * If the NON_CONSISTENT attribute is set, then this function just
+ * returns "normal", cachable memory.
+ *
+ * There are additional flags WEAK_ORDERING and WRITE_COMBINE to take
+ * into consideration here, too. All current known implementations of
+ * the OR1K support only strongly ordered memory accesses, so that flag
+ * is being ignored for now; uncached but write-combined memory is a
+ * missing feature of the OR1K.
*/
-void *or1k_dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp)
+static void *
+or1k_dma_alloc(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp,
+ struct dma_attrs *attrs)
{
unsigned long va;
void *page;
@@ -87,20 +101,23 @@ void *or1k_dma_alloc_coherent(struct device *dev, size_t size,
va = (unsigned long)page;
- /*
- * We need to iterate through the pages, clearing the dcache for
- * them and setting the cache-inhibit bit.
- */
- if (walk_page_range(va, va + size, &walk)) {
- free_pages_exact(page, size);
- return NULL;
+ if (!dma_get_attr(DMA_ATTR_NON_CONSISTENT, attrs)) {
+ /*
+ * We need to iterate through the pages, clearing the dcache for
+ * them and setting the cache-inhibit bit.
+ */
+ if (walk_page_range(va, va + size, &walk)) {
+ free_pages_exact(page, size);
+ return NULL;
+ }
}
return (void *)va;
}
-void or1k_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle)
+static void
+or1k_dma_free(struct device *dev, size_t size, void *vaddr,
+ dma_addr_t dma_handle, struct dma_attrs *attrs)
{
unsigned long va = (unsigned long)vaddr;
struct mm_walk walk = {
@@ -108,16 +125,19 @@ void or1k_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
.mm = &init_mm
};
- /* walk_page_range shouldn't be able to fail here */
- WARN_ON(walk_page_range(va, va + size, &walk));
+ if (!dma_get_attr(DMA_ATTR_NON_CONSISTENT, attrs)) {
+ /* walk_page_range shouldn't be able to fail here */
+ WARN_ON(walk_page_range(va, va + size, &walk));
+ }
free_pages_exact(vaddr, size);
}
-dma_addr_t or1k_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- struct dma_attrs *attrs)
+static dma_addr_t
+or1k_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs)
{
unsigned long cl;
dma_addr_t addr = page_to_phys(page) + offset;
@@ -147,16 +167,18 @@ dma_addr_t or1k_map_page(struct device *dev, struct page *page,
return addr;
}
-void or1k_unmap_page(struct device *dev, dma_addr_t dma_handle,
- size_t size, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+static void
+or1k_unmap_page(struct device *dev, dma_addr_t dma_handle,
+ size_t size, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
{
/* Nothing special to do here... */
}
-int or1k_map_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+static int
+or1k_map_sg(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
{
struct scatterlist *s;
int i;
@@ -169,9 +191,10 @@ int or1k_map_sg(struct device *dev, struct scatterlist *sg,
return nents;
}
-void or1k_unmap_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction dir,
- struct dma_attrs *attrs)
+static void
+or1k_unmap_sg(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
{
struct scatterlist *s;
int i;
@@ -181,9 +204,10 @@ void or1k_unmap_sg(struct device *dev, struct scatterlist *sg,
}
}
-void or1k_sync_single_for_cpu(struct device *dev,
- dma_addr_t dma_handle, size_t size,
- enum dma_data_direction dir)
+static void
+or1k_sync_single_for_cpu(struct device *dev,
+ dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction dir)
{
unsigned long cl;
dma_addr_t addr = dma_handle;
@@ -193,9 +217,10 @@ void or1k_sync_single_for_cpu(struct device *dev,
mtspr(SPR_DCBIR, cl);
}
-void or1k_sync_single_for_device(struct device *dev,
- dma_addr_t dma_handle, size_t size,
- enum dma_data_direction dir)
+static void
+or1k_sync_single_for_device(struct device *dev,
+ dma_addr_t dma_handle, size_t size,
+ enum dma_data_direction dir)
{
unsigned long cl;
dma_addr_t addr = dma_handle;
@@ -205,6 +230,18 @@ void or1k_sync_single_for_device(struct device *dev,
mtspr(SPR_DCBFR, cl);
}
+struct dma_map_ops or1k_dma_map_ops = {
+ .alloc = or1k_dma_alloc,
+ .free = or1k_dma_free,
+ .map_page = or1k_map_page,
+ .unmap_page = or1k_unmap_page,
+ .map_sg = or1k_map_sg,
+ .unmap_sg = or1k_unmap_sg,
+ .sync_single_for_cpu = or1k_sync_single_for_cpu,
+ .sync_single_for_device = or1k_sync_single_for_device,
+};
+EXPORT_SYMBOL(or1k_dma_map_ops);
+
/* Number of entries preallocated for DMA-API debugging */
#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16)
diff --git a/arch/openrisc/kernel/entry.S b/arch/openrisc/kernel/entry.S
index 6e61af8682b8..ddfcaa828b0e 100644
--- a/arch/openrisc/kernel/entry.S
+++ b/arch/openrisc/kernel/entry.S
@@ -1117,10 +1117,10 @@ ENTRY(sys_rt_sigreturn)
ENTRY(sys_or1k_atomic)
/* FIXME: This ignores r3 and always does an XCHG */
DISABLE_INTERRUPTS(r17,r19)
- l.lwz r30,0(r4)
- l.lwz r28,0(r5)
- l.sw 0(r4),r28
- l.sw 0(r5),r30
+ l.lwz r29,0(r4)
+ l.lwz r27,0(r5)
+ l.sw 0(r4),r27
+ l.sw 0(r5),r29
ENABLE_INTERRUPTS(r17)
l.jr r9
l.or r11,r0,r0
diff --git a/arch/openrisc/kernel/init_task.c b/arch/openrisc/kernel/init_task.c
deleted file mode 100644
index ca534082d5f3..000000000000
--- a/arch/openrisc/kernel/init_task.c
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * OpenRISC init_task.c
- *
- * Linux architectural port borrowing liberally from similar works of
- * others. All original copyrights apply as per the original source
- * declaration.
- *
- * Modifications for the OpenRISC architecture:
- * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
- * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
- *
- * 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/init_task.h>
-#include <linux/mqueue.h>
-#include <linux/export.h>
-
-static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
-static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
-
-/*
- * Initial thread structure.
- *
- * We need to make sure that this is THREAD_SIZE aligned due to the
- * way process stacks are handled. This is done by having a special
- * "init_task" linker map entry..
- */
-union thread_union init_thread_union __init_task_data = {
- INIT_THREAD_INFO(init_task)
-};
-
-/*
- * Initial task structure.
- *
- * All other task structs will be allocated on slabs in fork.c
- */
-struct task_struct init_task = INIT_TASK(init_task);
-EXPORT_SYMBOL(init_task);
diff --git a/arch/openrisc/kernel/irq.c b/arch/openrisc/kernel/irq.c
index 4bfead220956..e935b9d8eee1 100644
--- a/arch/openrisc/kernel/irq.c
+++ b/arch/openrisc/kernel/irq.c
@@ -14,17 +14,13 @@
* 2 of the License, or (at your option) any later version.
*/
-#include <linux/ptrace.h>
-#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/ftrace.h>
#include <linux/irq.h>
-#include <linux/seq_file.h>
-#include <linux/kernel_stat.h>
#include <linux/export.h>
-
+#include <linux/irqdomain.h>
#include <linux/irqflags.h>
/* read interrupt enabled status */
@@ -98,6 +94,7 @@ static void or1k_pic_mask_ack(struct irq_data *data)
#endif
}
+#if 0
static int or1k_pic_set_type(struct irq_data *data, unsigned int flow_type)
{
/* There's nothing to do in the PIC configuration when changing
@@ -107,43 +104,64 @@ static int or1k_pic_set_type(struct irq_data *data, unsigned int flow_type)
return irq_setup_alt_chip(data, flow_type);
}
+#endif
+
+static struct irq_chip or1k_dev = {
+ .name = "or1k-PIC",
+ .irq_unmask = or1k_pic_unmask,
+ .irq_mask = or1k_pic_mask,
+ .irq_ack = or1k_pic_ack,
+ .irq_mask_ack = or1k_pic_mask_ack,
+};
+
+static struct irq_domain *root_domain;
static inline int pic_get_irq(int first)
{
- int irq;
+ int hwirq;
- irq = ffs(mfspr(SPR_PICSR) >> first);
+ hwirq = ffs(mfspr(SPR_PICSR) >> first);
+ if (!hwirq)
+ return NO_IRQ;
+ else
+ hwirq = hwirq + first -1;
- return irq ? irq + first - 1 : NO_IRQ;
+ return irq_find_mapping(root_domain, hwirq);
}
-static void __init or1k_irq_init(void)
+
+static int or1k_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
{
- struct irq_chip_generic *gc;
- struct irq_chip_type *ct;
+ irq_set_chip_and_handler_name(irq, &or1k_dev,
+ handle_level_irq, "level");
+ irq_set_status_flags(irq, IRQ_LEVEL | IRQ_NOPROBE);
- /* Disable all interrupts until explicitly requested */
- mtspr(SPR_PICMR, (0UL));
+ return 0;
+}
- gc = irq_alloc_generic_chip("or1k-PIC", 1, 0, 0, handle_level_irq);
- ct = gc->chip_types;
+static const struct irq_domain_ops or1k_irq_domain_ops = {
+ .xlate = irq_domain_xlate_onecell,
+ .map = or1k_map,
+};
- ct->chip.irq_unmask = or1k_pic_unmask;
- ct->chip.irq_mask = or1k_pic_mask;
- ct->chip.irq_ack = or1k_pic_ack;
- ct->chip.irq_mask_ack = or1k_pic_mask_ack;
- ct->chip.irq_set_type = or1k_pic_set_type;
+/*
+ * This sets up the IRQ domain for the PIC built in to the OpenRISC
+ * 1000 CPU. This is the "root" domain as these are the interrupts
+ * that directly trigger an exception in the CPU.
+ */
+static void __init or1k_irq_init(void)
+{
+ struct device_node *intc = NULL;
- /* The OR1K PIC can handle both level and edge trigged
- * interrupts in roughly the same manner
- */
-#if 0
- /* FIXME: chip.type??? */
- ct->chip.type = IRQ_TYPE_EDGE_BOTH | IRQ_TYPE_LEVEL_MASK;
-#endif
+ /* The interrupt controller device node is mandatory */
+ intc = of_find_compatible_node(NULL, NULL, "opencores,or1k-pic");
+ BUG_ON(!intc);
- irq_setup_generic_chip(gc, IRQ_MSK(NR_IRQS), 0,
- IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
+ /* Disable all interrupts until explicitly requested */
+ mtspr(SPR_PICMR, (0UL));
+
+ root_domain = irq_domain_add_linear(intc, 32,
+ &or1k_irq_domain_ops, NULL);
}
void __init init_IRQ(void)
@@ -164,10 +182,3 @@ void __irq_entry do_IRQ(struct pt_regs *regs)
irq_exit();
set_irq_regs(old_regs);
}
-
-unsigned int irq_create_of_mapping(struct device_node *controller,
- const u32 *intspec, unsigned int intsize)
-{
- return intspec[0];
-}
-EXPORT_SYMBOL_GPL(irq_create_of_mapping);
diff --git a/arch/openrisc/mm/fault.c b/arch/openrisc/mm/fault.c
index a5dce82f864b..40f850e9766c 100644
--- a/arch/openrisc/mm/fault.c
+++ b/arch/openrisc/mm/fault.c
@@ -54,6 +54,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address,
struct vm_area_struct *vma;
siginfo_t info;
int fault;
+ unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
tsk = current;
@@ -105,6 +106,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address,
if (in_interrupt() || !mm)
goto no_context;
+retry:
down_read(&mm->mmap_sem);
vma = find_vma(mm, address);
@@ -143,6 +145,7 @@ good_area:
if (write_acc) {
if (!(vma->vm_flags & VM_WRITE))
goto bad_area;
+ flags |= FAULT_FLAG_WRITE;
} else {
/* not present */
if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
@@ -159,7 +162,11 @@ good_area:
* the fault.
*/
- fault = handle_mm_fault(mm, vma, address, write_acc);
+ fault = handle_mm_fault(mm, vma, address, flags);
+
+ if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
+ return;
+
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
@@ -167,11 +174,24 @@ good_area:
goto do_sigbus;
BUG();
}
- /*RGD modeled on Cris */
- if (fault & VM_FAULT_MAJOR)
- tsk->maj_flt++;
- else
- tsk->min_flt++;
+
+ if (flags & FAULT_FLAG_ALLOW_RETRY) {
+ /*RGD modeled on Cris */
+ if (fault & VM_FAULT_MAJOR)
+ tsk->maj_flt++;
+ else
+ tsk->min_flt++;
+ if (fault & VM_FAULT_RETRY) {
+ flags &= ~FAULT_FLAG_ALLOW_RETRY;
+
+ /* No need to up_read(&mm->mmap_sem) as we would
+ * have already released it in __lock_page_or_retry
+ * in mm/filemap.c.
+ */
+
+ goto retry;
+ }
+ }
up_read(&mm->mmap_sem);
return;