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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __GENERIC_IO_H
#define __GENERIC_IO_H

#include <linux/linkage.h>
#include <asm/byteorder.h>

/*
 * These are the "generic" interfaces for doing new-style
 * memory-mapped or PIO accesses. Architectures may do
 * their own arch-optimized versions, these just act as
 * wrappers around the old-style IO register access functions:
 * read[bwl]/write[bwl]/in[bwl]/out[bwl]
 *
 * Don't include this directly, include it from <asm/io.h>.
 */

/*
 * Read/write from/to an (offsettable) iomem cookie. It might be a PIO
 * access or a MMIO access, these functions don't care. The info is
 * encoded in the hardware mapping set up by the mapping functions
 * (or the cookie itself, depending on implementation and hw).
 *
 * The generic routines just encode the PIO/MMIO as part of the
 * cookie, and coldly assume that the MMIO IO mappings are not
 * in the low address range. Architectures for which this is not
 * true can't use this generic implementation.
 */
extern unsigned int ioread8(void __iomem *);
extern unsigned int ioread16(void __iomem *);
extern unsigned int ioread16be(void __iomem *);
extern unsigned int ioread32(void __iomem *);
extern unsigned int ioread32be(void __iomem *);
#ifdef CONFIG_64BIT
extern u64 ioread64(void __iomem *);
extern u64 ioread64be(void __iomem *);
#endif

extern void iowrite8(u8, void __iomem *);
extern void iowrite16(u16, void __iomem *);
extern void iowrite16be(u16, void __iomem *);
extern void iowrite32(u32, void __iomem *);
extern void iowrite32be(u32, void __iomem *);
#ifdef CONFIG_64BIT
extern void iowrite64(u64, void __iomem *);
extern void iowrite64be(u64, void __iomem *);
#endif

/*
 * "string" versions of the above. Note that they
 * use native byte ordering for the accesses (on
 * the assumption that IO and memory agree on a
 * byte order, and CPU byteorder is irrelevant).
 *
 * They do _not_ update the port address. If you
 * want MMIO that copies stuff laid out in MMIO
 * memory across multiple ports, use "memcpy_toio()"
 * and friends.
 */
extern void ioread8_rep(void __iomem *port, void *buf, unsigned long count);
extern void ioread16_rep(void __iomem *port, void *buf, unsigned long count);
extern void ioread32_rep(void __iomem *port, void *buf, unsigned long count);

extern void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count);
extern void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count);
extern void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count);

#ifdef CONFIG_HAS_IOPORT_MAP
/* Create a virtual mapping cookie for an IO port range */
extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
extern void ioport_unmap(void __iomem *);
#endif

#ifndef ARCH_HAS_IOREMAP_WC
#define ioremap_wc ioremap_nocache
#endif

#ifndef ARCH_HAS_IOREMAP_WT
#define ioremap_wt ioremap_nocache
#endif

#ifdef CONFIG_PCI
/* Destroy a virtual mapping cookie for a PCI BAR (memory or IO) */
struct pci_dev;
extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
#elif defined(CONFIG_GENERIC_IOMAP)
struct pci_dev;
static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
{ }
#endif

#include <asm-generic/pci_iomap.h>

#endif

Filemanager

Name Type Size Permission Actions
bitops Folder 0755
4level-fixup.h File 1.07 KB 0644
5level-fixup.h File 1.15 KB 0644
asm-offsets.h File 35 B 0644
asm-prototypes.h File 507 B 0644
atomic-long.h File 7.09 KB 0644
atomic.h File 5.11 KB 0644
atomic64.h File 2.26 KB 0644
audit_change_attr.h File 484 B 0644
audit_dir_write.h File 500 B 0644
audit_read.h File 241 B 0644
audit_signal.h File 36 B 0644
audit_write.h File 461 B 0644
barrier.h File 6.01 KB 0644
bitops.h File 1.09 KB 0644
bitsperlong.h File 592 B 0644
bug.h File 6.6 KB 0644
bugs.h File 267 B 0644
cache.h File 384 B 0644
cacheflush.h File 1.31 KB 0644
checksum.h File 2.27 KB 0644
clkdev.h File 706 B 0644
cmpxchg-local.h File 1.43 KB 0644
cmpxchg.h File 2.23 KB 0644
current.h File 256 B 0644
delay.h File 1.13 KB 0644
device.h File 245 B 0644
div64.h File 7.28 KB 0644
dma-contiguous.h File 238 B 0644
dma.h File 553 B 0644
early_ioremap.h File 1.66 KB 0644
emergency-restart.h File 248 B 0644
exec.h File 697 B 0644
export.h File 2.2 KB 0644
extable.h File 802 B 0644
fb.h File 271 B 0644
fixmap.h File 2.84 KB 0644
ftrace.h File 460 B 0644
futex.h File 2.88 KB 0644
getorder.h File 1.22 KB 0644
gpio.h File 4.45 KB 0644
hardirq.h File 532 B 0644
hugetlb.h File 845 B 0644
hw_irq.h File 270 B 0644
ide_iops.h File 791 B 0644
int-ll64.h File 932 B 0644
io.h File 20.39 KB 0644
ioctl.h File 506 B 0644
iomap.h File 3.16 KB 0644
irq.h File 403 B 0644
irq_regs.h File 980 B 0644
irq_work.h File 194 B 0644
irqflags.h File 1.51 KB 0644
kdebug.h File 182 B 0644
kmap_types.h File 198 B 0644
kprobes.h File 868 B 0644
kvm_para.h File 480 B 0644
linkage.h File 225 B 0644
local.h File 2.23 KB 0644
local64.h File 3.8 KB 0644
mcs_spinlock.h File 260 B 0644
memory_model.h File 2.16 KB 0644
mm-arch-hooks.h File 388 B 0644
mm_hooks.h File 885 B 0644
mmu.h File 449 B 0644
mmu_context.h File 881 B 0644
module.h File 1.09 KB 0644
msi.h File 838 B 0644
page.h File 2.4 KB 0644
param.h File 367 B 0644
parport.h File 604 B 0644
pci.h File 581 B 0644
pci_iomap.h File 1.96 KB 0644
percpu.h File 12.72 KB 0644
pgalloc.h File 342 B 0644
pgtable-nop4d-hack.h File 1.86 KB 0644
pgtable-nop4d.h File 1.64 KB 0644
pgtable-nopmd.h File 1.9 KB 0644
pgtable-nopud.h File 1.97 KB 0644
pgtable.h File 29.5 KB 0644
preempt.h File 1.94 KB 0644
ptrace.h File 1.58 KB 0644
qrwlock.h File 3.78 KB 0644
qrwlock_types.h File 655 B 0644
qspinlock.h File 3.67 KB 0644
qspinlock_types.h File 2.77 KB 0644
resource.h File 1.07 KB 0644
rwsem.h File 3.21 KB 0644
seccomp.h File 1.3 KB 0644
sections.h File 4.8 KB 0644
segment.h File 249 B 0644
serial.h File 345 B 0644
set_memory.h File 362 B 0644
signal.h File 308 B 0644
simd.h File 436 B 0644
sizes.h File 78 B 0644
spinlock.h File 329 B 0644
statfs.h File 169 B 0644
string.h File 281 B 0644
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syscall.h File 6.18 KB 0644
syscalls.h File 739 B 0644
termios-base.h File 2.11 KB 0644
termios.h File 2.81 KB 0644
timex.h File 508 B 0644
tlb.h File 9.4 KB 0644
tlbflush.h File 485 B 0644
topology.h File 2.18 KB 0644
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vmlinux.lds.h File 29.17 KB 0644
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