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/*
 * IO definitions for the Hexagon architecture
 *
 * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only 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., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#ifndef _ASM_IO_H
#define _ASM_IO_H

#ifdef __KERNEL__

#include <linux/types.h>
#include <asm/iomap.h>
#include <asm/page.h>
#include <asm/cacheflush.h>

/*
 * We don't have PCI yet.
 * _IO_BASE is pointing at what should be unused virtual space.
 */
#define IO_SPACE_LIMIT 0xffff
#define _IO_BASE ((void __iomem *)0xfe000000)

#define IOMEM(x)        ((void __force __iomem *)(x))

extern int remap_area_pages(unsigned long start, unsigned long phys_addr,
				unsigned long end, unsigned long flags);

extern void __iounmap(const volatile void __iomem *addr);

/* Defined in lib/io.c, needed for smc91x driver. */
extern void __raw_readsw(const void __iomem *addr, void *data, int wordlen);
extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen);

extern void __raw_readsl(const void __iomem *addr, void *data, int wordlen);
extern void __raw_writesl(void __iomem *addr, const void *data, int wordlen);

#define readsw(p, d, l)	__raw_readsw(p, d, l)
#define writesw(p, d, l) __raw_writesw(p, d, l)

#define readsl(p, d, l)   __raw_readsl(p, d, l)
#define writesl(p, d, l)  __raw_writesl(p, d, l)

/*
 * virt_to_phys - map virtual address to physical
 * @address:  address to map
 */
static inline unsigned long virt_to_phys(volatile void *address)
{
	return __pa(address);
}

/*
 * phys_to_virt - map physical address to virtual
 * @address: address to map
 */
static inline void *phys_to_virt(unsigned long address)
{
	return __va(address);
}

/*
 * convert a physical pointer to a virtual kernel pointer for
 * /dev/mem access.
 */
#define xlate_dev_kmem_ptr(p)    __va(p)
#define xlate_dev_mem_ptr(p)    __va(p)

/*
 * IO port access primitives.  Hexagon doesn't have special IO access
 * instructions; all I/O is memory mapped.
 *
 * in/out are used for "ports", but we don't have "port instructions",
 * so these are really just memory mapped too.
 */

/*
 * readb - read byte from memory mapped device
 * @addr:  pointer to memory
 *
 * Operates on "I/O bus memory space"
 */
static inline u8 readb(const volatile void __iomem *addr)
{
	u8 val;
	asm volatile(
		"%0 = memb(%1);"
		: "=&r" (val)
		: "r" (addr)
	);
	return val;
}

static inline u16 readw(const volatile void __iomem *addr)
{
	u16 val;
	asm volatile(
		"%0 = memh(%1);"
		: "=&r" (val)
		: "r" (addr)
	);
	return val;
}

static inline u32 readl(const volatile void __iomem *addr)
{
	u32 val;
	asm volatile(
		"%0 = memw(%1);"
		: "=&r" (val)
		: "r" (addr)
	);
	return val;
}

/*
 * writeb - write a byte to a memory location
 * @data: data to write to
 * @addr:  pointer to memory
 *
 */
static inline void writeb(u8 data, volatile void __iomem *addr)
{
	asm volatile(
		"memb(%0) = %1;"
		:
		: "r" (addr), "r" (data)
		: "memory"
	);
}

static inline void writew(u16 data, volatile void __iomem *addr)
{
	asm volatile(
		"memh(%0) = %1;"
		:
		: "r" (addr), "r" (data)
		: "memory"
	);

}

static inline void writel(u32 data, volatile void __iomem *addr)
{
	asm volatile(
		"memw(%0) = %1;"
		:
		: "r" (addr), "r" (data)
		: "memory"
	);
}

#define __raw_writeb writeb
#define __raw_writew writew
#define __raw_writel writel

#define __raw_readb readb
#define __raw_readw readw
#define __raw_readl readl

/*
 * http://comments.gmane.org/gmane.linux.ports.arm.kernel/117626
 */

#define readb_relaxed __raw_readb
#define readw_relaxed __raw_readw
#define readl_relaxed __raw_readl

#define writeb_relaxed __raw_writeb
#define writew_relaxed __raw_writew
#define writel_relaxed __raw_writel

#define mmiowb()

void __iomem *ioremap(unsigned long phys_addr, unsigned long size);
#define ioremap_nocache ioremap
#define ioremap_uc(X, Y) ioremap((X), (Y))


static inline void iounmap(volatile void __iomem *addr)
{
	__iounmap(addr);
}

#define __raw_writel writel

static inline void memcpy_fromio(void *dst, const volatile void __iomem *src,
	int count)
{
	memcpy(dst, (void *) src, count);
}

static inline void memcpy_toio(volatile void __iomem *dst, const void *src,
	int count)
{
	memcpy((void *) dst, src, count);
}

static inline void memset_io(volatile void __iomem *addr, int value,
			     size_t size)
{
	memset((void __force *)addr, value, size);
}

#define PCI_IO_ADDR	(volatile void __iomem *)

/*
 * inb - read byte from I/O port or something
 * @port:  address in I/O space
 *
 * Operates on "I/O bus I/O space"
 */
static inline u8 inb(unsigned long port)
{
	return readb(_IO_BASE + (port & IO_SPACE_LIMIT));
}

static inline u16 inw(unsigned long port)
{
	return readw(_IO_BASE + (port & IO_SPACE_LIMIT));
}

static inline u32 inl(unsigned long port)
{
	return readl(_IO_BASE + (port & IO_SPACE_LIMIT));
}

/*
 * outb - write a byte to a memory location
 * @data: data to write to
 * @addr:  address in I/O space
 */
static inline void outb(u8 data, unsigned long port)
{
	writeb(data, _IO_BASE + (port & IO_SPACE_LIMIT));
}

static inline void outw(u16 data, unsigned long port)
{
	writew(data, _IO_BASE + (port & IO_SPACE_LIMIT));
}

static inline void outl(u32 data, unsigned long port)
{
	writel(data, _IO_BASE + (port & IO_SPACE_LIMIT));
}

#define outb_p outb
#define outw_p outw
#define outl_p outl

#define inb_p inb
#define inw_p inw
#define inl_p inl

static inline void insb(unsigned long port, void *buffer, int count)
{
	if (count) {
		u8 *buf = buffer;
		do {
			u8 x = inb(port);
			*buf++ = x;
		} while (--count);
	}
}

static inline void insw(unsigned long port, void *buffer, int count)
{
	if (count) {
		u16 *buf = buffer;
		do {
			u16 x = inw(port);
			*buf++ = x;
		} while (--count);
	}
}

static inline void insl(unsigned long port, void *buffer, int count)
{
	if (count) {
		u32 *buf = buffer;
		do {
			u32 x = inw(port);
			*buf++ = x;
		} while (--count);
	}
}

static inline void outsb(unsigned long port, const void *buffer, int count)
{
	if (count) {
		const u8 *buf = buffer;
		do {
			outb(*buf++, port);
		} while (--count);
	}
}

static inline void outsw(unsigned long port, const void *buffer, int count)
{
	if (count) {
		const u16 *buf = buffer;
		do {
			outw(*buf++, port);
		} while (--count);
	}
}

static inline void outsl(unsigned long port, const void *buffer, int count)
{
	if (count) {
		const u32 *buf = buffer;
		do {
			outl(*buf++, port);
		} while (--count);
	}
}

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

#endif /* __KERNEL__ */

#endif

Filemanager

Name Type Size Permission Actions
Kbuild File 886 B 0644
asm-offsets.h File 35 B 0644
atomic.h File 5.27 KB 0644
bitops.h File 6.62 KB 0644
cache.h File 1.16 KB 0644
cacheflush.h File 3.8 KB 0644
checksum.h File 1.61 KB 0644
cmpxchg.h File 2.55 KB 0644
delay.h File 978 B 0644
dma-mapping.h File 1.31 KB 0644
dma.h File 934 B 0644
elf.h File 6.34 KB 0644
exec.h File 1.01 KB 0644
fixmap.h File 1.11 KB 0644
fpu.h File 90 B 0644
futex.h File 2.25 KB 0644
hexagon_vm.h File 6.39 KB 0644
intrinsics.h File 1003 B 0644
io.h File 6.95 KB 0644
irq.h File 1.13 KB 0644
irqflags.h File 1.46 KB 0644
kgdb.h File 1.36 KB 0644
linkage.h File 871 B 0644
mem-layout.h File 3.42 KB 0644
mmu.h File 1.1 KB 0644
mmu_context.h File 2.59 KB 0644
module.h File 910 B 0644
page.h File 4.74 KB 0644
perf_event.h File 841 B 0644
pgalloc.h File 4.08 KB 0644
pgtable.h File 14.15 KB 0644
processor.h File 3.8 KB 0644
smp.h File 1.31 KB 0644
spinlock.h File 3.84 KB 0644
spinlock_types.h File 1.15 KB 0644
string.h File 1.08 KB 0644
suspend.h File 872 B 0644
switch_to.h File 1.09 KB 0644
syscall.h File 1.38 KB 0644
thread_info.h File 4.05 KB 0644
time.h File 980 B 0644
timer-regs.h File 1.23 KB 0644
timex.h File 1.13 KB 0644
tlb.h File 1.21 KB 0644
tlbflush.h File 2.08 KB 0644
traps.h File 1.02 KB 0644
uaccess.h File 3.67 KB 0644
vdso.h File 941 B 0644
vm_fault.h File 993 B 0644
vm_mmu.h File 3.37 KB 0644