arm64: Device specific operations

/*

 * 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, see <http://www.gnu.org/licenses/>.

 */

#ifndef __ASM_DEVICE_H

#define __ASM_DEVICE_H

struct dev_archdata {

	struct dma_map_ops *dma_ops;

};

struct pdev_archdata {

};

#endif

/*

 * 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, see <http://www.gnu.org/licenses/>.

 */

#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_ */

/*

 * 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, see <http://www.gnu.org/licenses/>.

 */

#ifndef __ASM_IO_H

#define __ASM_IO_H

#ifdef __KERNEL__

#include <linux/types.h>

#include <asm/byteorder.h>

#include <asm/barrier.h>

#include <asm/pgtable.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 *addr)

{

	asm volatile("str %0, [%1]" : : "r" (val), "r" (addr));

}

static inline u8 __raw_readb(const volatile void __iomem *addr)

{

	u8 val;

	asm volatile("ldrb %w0, [%1]" : "=r" (val) : "r" (addr));

	return val;

}

static inline u16 __raw_readw(const volatile void __iomem *addr)

{

	u16 val;

	asm volatile("ldrh %w0, [%1]" : "=r" (val) : "r" (addr));

	return val;

}

static inline u32 __raw_readl(const volatile void __iomem *addr)

{

	u32 val;

	asm volatile("ldr %w0, [%1]" : "=r" (val) : "r" (addr));

	return val;

}

static inline u64 __raw_readq(const volatile void __iomem *addr)

{

	u64 val;

	asm volatile("ldr %0, [%1]" : "=r" (val) : "r" (addr));

	return val;

}

/* IO barriers */

#define __iormb()		rmb()

#define __iowmb()		wmb()

#define mmiowb()		do { } while (0)

/*

 * Relaxed I/O memory access primitives. These follow the Device memory

 * ordering rules but do not guarantee any ordering relative to Normal memory

 * accesses.

 */

#define readb_relaxed(c)	({ u8  __v = __raw_readb(c); __v; })

#define readw_relaxed(c)	({ u16 __v = le16_to_cpu((__force __le16)__raw_readw(c)); __v; })

#define readl_relaxed(c)	({ u32 __v = le32_to_cpu((__force __le32)__raw_readl(c)); __v; })

#define writeb_relaxed(v,c)	((void)__raw_writeb((v),(c)))

#define writew_relaxed(v,c)	((void)__raw_writew((__force u16)cpu_to_le16(v),(c)))

#define writel_relaxed(v,c)	((void)__raw_writel((__force u32)cpu_to_le32(v),(c)))

/*

 * I/O memory access primitives. Reads are ordered relative to any

 * following Normal memory access. Writes are ordered relative to any prior

 * Normal memory access.

 */

#define readb(c)		({ u8  __v = readb_relaxed(c); __iormb(); __v; })

#define readw(c)		({ u16 __v = readw_relaxed(c); __iormb(); __v; })

#define readl(c)		({ u32 __v = readl_relaxed(c); __iormb(); __v; })

#define writeb(v,c)		({ __iowmb(); writeb_relaxed((v),(c)); })

#define writew(v,c)		({ __iowmb(); writew_relaxed((v),(c)); })

#define writel(v,c)		({ __iowmb(); writel_relaxed((v),(c)); })

/*

 *  I/O port access primitives.

 */

#define IO_SPACE_LIMIT		0xffff

#define PCI_IOBASE		((void __iomem *)0xffffffbbfffe0000UL)

static inline u8 inb(unsigned long addr)

{

	return readb(addr + PCI_IOBASE);

}

static inline u16 inw(unsigned long addr)

{

	return readw(addr + PCI_IOBASE);

}

static inline u32 inl(unsigned long addr)

{

	return readl(addr + PCI_IOBASE);

}

static inline void outb(u8 b, unsigned long addr)

{

	writeb(b, addr + PCI_IOBASE);

}

static inline void outw(u16 b, unsigned long addr)

{

	writew(b, addr + PCI_IOBASE);

}

static inline void outl(u32 b, unsigned long addr)

{

	writel(b, addr + PCI_IOBASE);

}

#define inb_p(addr)	inb(addr)

#define inw_p(addr)	inw(addr)

#define inl_p(addr)	inl(addr)

#define outb_p(x, addr)	outb((x), (addr))

#define outw_p(x, addr)	outw((x), (addr))

#define outl_p(x, addr)	outl((x), (addr))

static inline void insb(unsigned long addr, void *buffer, int count)

{

	u8 *buf = buffer;

	while (count--)

		*buf++ = __raw_readb(addr + PCI_IOBASE);

}

static inline void insw(unsigned long addr, void *buffer, int count)

{

	u16 *buf = buffer;

	while (count--)

		*buf++ = __raw_readw(addr + PCI_IOBASE);

}

static inline void insl(unsigned long addr, void *buffer, int count)

{

	u32 *buf = buffer;

	while (count--)

		*buf++ = __raw_readl(addr + PCI_IOBASE);

}

static inline void outsb(unsigned long addr, const void *buffer, int count)

{

	const u8 *buf = buffer;

	while (count--)

		__raw_writeb(*buf++, addr + PCI_IOBASE);

}

static inline void outsw(unsigned long addr, const void *buffer, int count)

{

	const u16 *buf = buffer;

	while (count--)

		__raw_writew(*buf++, addr + PCI_IOBASE);

}

static inline void outsl(unsigned long addr, const void *buffer, int count)

{

	const u32 *buf = buffer;

	while (count--)

		__raw_writel(*buf++, addr + PCI_IOBASE);

}

#define insb_p(port,to,len)	insb(port,to,len)

#define insw_p(port,to,len)	insw(port,to,len)

#define insl_p(port,to,len)	insl(port,to,len)

#define outsb_p(port,from,len)	outsb(port,from,len)

#define outsw_p(port,from,len)	outsw(port,from,len)

#define outsl_p(port,from,len)	outsl(port,from,len)

/*

 * String version of I/O memory access operations.

 */

extern void __memcpy_fromio(void *, const volatile void __iomem *, size_t);

extern void __memcpy_toio(volatile void __iomem *, const void *, size_t);

extern void __memset_io(volatile void __iomem *, int, size_t);

#define memset_io(c,v,l)	__memset_io((c),(v),(l))

#define memcpy_fromio(a,c,l)	__memcpy_fromio((a),(c),(l))

#define memcpy_toio(c,a,l)	__memcpy_toio((c),(a),(l))

/*

 * I/O memory mapping functions.

 */

extern void __iomem *__ioremap(phys_addr_t phys_addr, size_t size, pgprot_t prot);

extern void __iounmap(volatile void __iomem *addr);

#define PROT_DEFAULT		(PTE_TYPE_PAGE | PTE_AF | PTE_DIRTY)

#define PROT_DEVICE_nGnRE	(PROT_DEFAULT | PTE_XN | PTE_ATTRINDX(MT_DEVICE_nGnRE))

#define PROT_NORMAL_NC		(PROT_DEFAULT | PTE_ATTRINDX(MT_NORMAL_NC))

#define ioremap(addr, size)		__ioremap((addr), (size), PROT_DEVICE_nGnRE)

#define ioremap_nocache(addr, size)	__ioremap((addr), (size), PROT_DEVICE_nGnRE)

#define ioremap_wc(addr, size)		__ioremap((addr), (size), PROT_NORMAL_NC)

#define iounmap				__iounmap

#define ARCH_HAS_IOREMAP_WC

#include <asm-generic/iomap.h>

/*

 * More restrictive address range checking than the default implementation

 * (PHYS_OFFSET and PHYS_MASK taken into account).

 */

#define ARCH_HAS_VALID_PHYS_ADDR_RANGE

extern int valid_phys_addr_range(unsigned long addr, size_t size);

extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size);

extern int devmem_is_allowed(unsigned long pfn);

/*

 * Convert a physical pointer to a virtual kernel pointer for /dev/mem

 * access

 */

#define xlate_dev_mem_ptr(p)	__va(p)

/*

 * Convert a virtual cached pointer to an uncached pointer

 */

#define xlate_dev_kmem_ptr(p)	p

#endif	/* __KERNEL__ */

#endif	/* __ASM_IO_H */

/*

 * Based on arch/arm/kernel/io.c

 *

 * 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, see <http://www.gnu.org/licenses/>.

 */

#include <linux/export.h>

#include <linux/types.h>

#include <linux/io.h>

/*

 * Copy data from IO memory space to "real" memory space.

 */

void __memcpy_fromio(void *to, const volatile void __iomem *from, size_t count)

{

	unsigned char *t = to;

	while (count) {

		count--;

		*t = readb(from);

		t++;

		from++;

	}

}

EXPORT_SYMBOL(__memcpy_fromio);

/*

 * Copy data from "real" memory space to IO memory space.

 */

void __memcpy_toio(volatile void __iomem *to, const void *from, size_t count)

{

	const unsigned char *f = from;

	while (count) {

		count--;

		writeb(*f, to);

		f++;

		to++;

	}

}

EXPORT_SYMBOL(__memcpy_toio);

/*

 * "memset" on IO memory space.

 */

void __memset_io(volatile void __iomem *dst, int c, size_t count)

{

	while (count) {

		count--;

		writeb(c, dst);

		dst++;

	}

}

EXPORT_SYMBOL(__memset_io);

/*

 * Based on arch/arm/mm/ioremap.c

 *

 * (C) Copyright 1995 1996 Linus Torvalds

 * Hacked for ARM by Phil Blundell <philb@gnu.org>

 * Hacked to allow all architectures to build, and various cleanups

 * by 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, see <http://www.gnu.org/licenses/>.

 */

#include <linux/export.h>

#include <linux/mm.h>

#include <linux/vmalloc.h>

#include <linux/io.h>

static void __iomem *__ioremap_caller(phys_addr_t phys_addr, size_t size,

				      pgprot_t prot, void *caller)

{

	unsigned long last_addr;

	unsigned long offset = phys_addr & ~PAGE_MASK;

	int err;

	unsigned long addr;

	struct vm_struct *area;

	/*

	 * Page align the mapping address and size, taking account of any

	 * offset.

	 */

	phys_addr &= PAGE_MASK;

	size = PAGE_ALIGN(size + offset);

	/*

	 * Don't allow wraparound, zero size or outside PHYS_MASK.

	 */

	last_addr = phys_addr + size - 1;

	if (!size || last_addr < phys_addr || (last_addr & ~PHYS_MASK))

		return NULL;

	/*

	 * Don't allow RAM to be mapped.

	 */

	if (WARN_ON(pfn_valid(__phys_to_pfn(phys_addr))))

		return NULL;

	area = get_vm_area_caller(size, VM_IOREMAP, caller);

	if (!area)

		return NULL;

	addr = (unsigned long)area->addr;

	err = ioremap_page_range(addr, addr + size, phys_addr, prot);

	if (err) {

		vunmap((void *)addr);

		return NULL;

	}

	return (void __iomem *)(offset + addr);

}

void __iomem *__ioremap(phys_addr_t phys_addr, size_t size, pgprot_t prot)

{

	return __ioremap_caller(phys_addr, size, prot,

				__builtin_return_address(0));

}

EXPORT_SYMBOL(__ioremap);

void __iounmap(volatile void __iomem *io_addr)

{

	void *addr = (void *)(PAGE_MASK & (unsigned long)io_addr);

	vunmap(addr);

}

EXPORT_SYMBOL(__iounmap);