[PATCH 19/36] AArch64: Device specific operations
This patch adds several definitions for device communication, including
I/O accessors and ioremap(). The __raw_* accessors are implemented as
inline asm to avoid compiler generation of post-indexed accesses (less
efficient to emulate in a virtualised environment).
Signed-off-by: Will Deacon
Signed-off-by: Catalin Marinas
---
arch/aarch64/include/asm/device.h | 27
arch/aarch64/include/asm/fb.h | 35 +
arch/aarch64/include/asm/io.h | 260 +
arch/aarch64/kernel/io.c | 65 +
arch/aarch64/mm/ioremap.c | 102 +++
5 files changed, 489 insertions(+), 0 deletions(-)
create mode 100644 arch/aarch64/include/asm/device.h
create mode 100644 arch/aarch64/include/asm/fb.h
create mode 100644 arch/aarch64/include/asm/io.h
create mode 100644 arch/aarch64/kernel/io.c
create mode 100644 arch/aarch64/mm/ioremap.c
diff --git a/arch/aarch64/include/asm/device.h
b/arch/aarch64/include/asm/device.h
new file mode 100644
index 000..0fc1008
--- /dev/null
+++ b/arch/aarch64/include/asm/device.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef __ASM_DEVICE_H
+#define __ASM_DEVICE_H
+
+struct dev_archdata {
+ struct dma_map_ops *dma_ops;
+};
+
+struct pdev_archdata {
+};
+
+#endif
diff --git a/arch/aarch64/include/asm/fb.h b/arch/aarch64/include/asm/fb.h
new file mode 100644
index 000..be9167e
--- /dev/null
+++ b/arch/aarch64/include/asm/fb.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef __ASM_FB_H_
+#define __ASM_FB_H_
+
+#include
+#include
+#include
+
+static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
+ unsigned long off)
+{
+ vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+}
+
+static inline int fb_is_primary_device(struct fb_info *info)
+{
+ return 0;
+}
+
+#endif /* __ASM_FB_H_ */
diff --git a/arch/aarch64/include/asm/io.h b/arch/aarch64/include/asm/io.h
new file mode 100644
index 000..958cb7c
--- /dev/null
+++ b/arch/aarch64/include/asm/io.h
@@ -0,0 +1,260 @@
+/*
+ * Based on arch/arm/include/asm/io.h
+ *
+ * Copyright (C) 1996-2000 Russell King
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef __ASM_IO_H
+#define __ASM_IO_H
+
+#ifdef __KERNEL__
+
+#include
+
+#include
+#include
+
+/*
+ * Generic IO read/write. These perform native-endian accesses.
+ */
+static inline void __raw_writeb(u8 val, volatile void __iomem *addr)
+{
+ asm volatile("strb %w0, [%1]" : : "r" (val), "r" (addr));
+}
+
+static inline void __raw_writew(u16 val, volatile void __iomem *addr)
+{
+ asm volatile("strh %w0, [%1]" : : "r" (val), "r" (addr));
+}
+
+static inline void __raw_writel(u32 val, volatile void __iomem *addr)
+{
+ asm volatile("str %w0, [%1]" : : "r" (val), "r" (addr));
+}
+
+static inline void __raw_writeq(u64 val, volatile void __iomem *addr)
+{
+ asm volatile("str %0, [%1]" : : "r" (val), "r" (addr));
+}
+
+static inline
[PATCH 19/36] AArch64: Device specific operations
This patch adds several definitions for device communication, including
I/O accessors and ioremap(). The __raw_* accessors are implemented as
inline asm to avoid compiler generation of post-indexed accesses (less
efficient to emulate in a virtualised environment).
Signed-off-by: Will Deacon will.dea...@arm.com
Signed-off-by: Catalin Marinas catalin.mari...@arm.com
---
arch/aarch64/include/asm/device.h | 27
arch/aarch64/include/asm/fb.h | 35 +
arch/aarch64/include/asm/io.h | 260 +
arch/aarch64/kernel/io.c | 65 +
arch/aarch64/mm/ioremap.c | 102 +++
5 files changed, 489 insertions(+), 0 deletions(-)
create mode 100644 arch/aarch64/include/asm/device.h
create mode 100644 arch/aarch64/include/asm/fb.h
create mode 100644 arch/aarch64/include/asm/io.h
create mode 100644 arch/aarch64/kernel/io.c
create mode 100644 arch/aarch64/mm/ioremap.c
diff --git a/arch/aarch64/include/asm/device.h
b/arch/aarch64/include/asm/device.h
new file mode 100644
index 000..0fc1008
--- /dev/null
+++ b/arch/aarch64/include/asm/device.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef __ASM_DEVICE_H
+#define __ASM_DEVICE_H
+
+struct dev_archdata {
+ struct dma_map_ops *dma_ops;
+};
+
+struct pdev_archdata {
+};
+
+#endif
diff --git a/arch/aarch64/include/asm/fb.h b/arch/aarch64/include/asm/fb.h
new file mode 100644
index 000..be9167e
--- /dev/null
+++ b/arch/aarch64/include/asm/fb.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef __ASM_FB_H_
+#define __ASM_FB_H_
+
+#include linux/fb.h
+#include linux/fs.h
+#include asm/page.h
+
+static inline void fb_pgprotect(struct file *file, struct vm_area_struct *vma,
+ unsigned long off)
+{
+ vma-vm_page_prot = pgprot_writecombine(vma-vm_page_prot);
+}
+
+static inline int fb_is_primary_device(struct fb_info *info)
+{
+ return 0;
+}
+
+#endif /* __ASM_FB_H_ */
diff --git a/arch/aarch64/include/asm/io.h b/arch/aarch64/include/asm/io.h
new file mode 100644
index 000..958cb7c
--- /dev/null
+++ b/arch/aarch64/include/asm/io.h
@@ -0,0 +1,260 @@
+/*
+ * Based on arch/arm/include/asm/io.h
+ *
+ * Copyright (C) 1996-2000 Russell King
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef __ASM_IO_H
+#define __ASM_IO_H
+
+#ifdef __KERNEL__
+
+#include linux/types.h
+
+#include asm/byteorder.h
+#include asm/barrier.h
+
+/*
+ * Generic IO read/write. These perform native-endian accesses.
+ */
+static inline void __raw_writeb(u8 val, volatile void __iomem *addr)
+{
+ asm volatile(strb %w0, [%1] : : r (val), r (addr));
+}
+
+static inline void __raw_writew(u16 val, volatile void __iomem *addr)
+{
+ asm volatile(strh %w0, [%1] : : r (val), r (addr));
+}
+
+static inline void __raw_writel(u32 val, volatile void __iomem *addr)
+{
+ asm volatile(str %w0, [%1] : : r (val), r (addr));
+}
+
+static inline void __raw_writeq(u64 val, volatile void __iomem
