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116 lines
4.0 KiB
116 lines
4.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __GENERIC_IO_H |
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#define __GENERIC_IO_H |
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#include <linux/linkage.h> |
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#include <asm/byteorder.h> |
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/* |
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* These are the "generic" interfaces for doing new-style |
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* memory-mapped or PIO accesses. Architectures may do |
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* their own arch-optimized versions, these just act as |
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* wrappers around the old-style IO register access functions: |
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* read[bwl]/write[bwl]/in[bwl]/out[bwl] |
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* |
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* Don't include this directly, include it from <asm/io.h>. |
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*/ |
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/* |
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* Read/write from/to an (offsettable) iomem cookie. It might be a PIO |
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* access or a MMIO access, these functions don't care. The info is |
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* encoded in the hardware mapping set up by the mapping functions |
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* (or the cookie itself, depending on implementation and hw). |
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* |
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* The generic routines just encode the PIO/MMIO as part of the |
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* cookie, and coldly assume that the MMIO IO mappings are not |
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* in the low address range. Architectures for which this is not |
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* true can't use this generic implementation. |
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*/ |
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extern unsigned int ioread8(const void __iomem *); |
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extern unsigned int ioread16(const void __iomem *); |
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extern unsigned int ioread16be(const void __iomem *); |
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extern unsigned int ioread32(const void __iomem *); |
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extern unsigned int ioread32be(const void __iomem *); |
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#ifdef CONFIG_64BIT |
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extern u64 ioread64(const void __iomem *); |
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extern u64 ioread64be(const void __iomem *); |
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#endif |
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#ifdef readq |
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#define ioread64_lo_hi ioread64_lo_hi |
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#define ioread64_hi_lo ioread64_hi_lo |
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#define ioread64be_lo_hi ioread64be_lo_hi |
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#define ioread64be_hi_lo ioread64be_hi_lo |
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extern u64 ioread64_lo_hi(const void __iomem *addr); |
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extern u64 ioread64_hi_lo(const void __iomem *addr); |
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extern u64 ioread64be_lo_hi(const void __iomem *addr); |
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extern u64 ioread64be_hi_lo(const void __iomem *addr); |
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#endif |
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extern void iowrite8(u8, void __iomem *); |
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extern void iowrite16(u16, void __iomem *); |
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extern void iowrite16be(u16, void __iomem *); |
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extern void iowrite32(u32, void __iomem *); |
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extern void iowrite32be(u32, void __iomem *); |
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#ifdef CONFIG_64BIT |
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extern void iowrite64(u64, void __iomem *); |
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extern void iowrite64be(u64, void __iomem *); |
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#endif |
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#ifdef writeq |
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#define iowrite64_lo_hi iowrite64_lo_hi |
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#define iowrite64_hi_lo iowrite64_hi_lo |
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#define iowrite64be_lo_hi iowrite64be_lo_hi |
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#define iowrite64be_hi_lo iowrite64be_hi_lo |
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extern void iowrite64_lo_hi(u64 val, void __iomem *addr); |
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extern void iowrite64_hi_lo(u64 val, void __iomem *addr); |
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extern void iowrite64be_lo_hi(u64 val, void __iomem *addr); |
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extern void iowrite64be_hi_lo(u64 val, void __iomem *addr); |
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#endif |
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/* |
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* "string" versions of the above. Note that they |
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* use native byte ordering for the accesses (on |
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* the assumption that IO and memory agree on a |
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* byte order, and CPU byteorder is irrelevant). |
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* |
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* They do _not_ update the port address. If you |
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* want MMIO that copies stuff laid out in MMIO |
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* memory across multiple ports, use "memcpy_toio()" |
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* and friends. |
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*/ |
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extern void ioread8_rep(const void __iomem *port, void *buf, unsigned long count); |
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extern void ioread16_rep(const void __iomem *port, void *buf, unsigned long count); |
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extern void ioread32_rep(const void __iomem *port, void *buf, unsigned long count); |
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extern void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count); |
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extern void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count); |
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extern void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count); |
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#ifdef CONFIG_HAS_IOPORT_MAP |
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/* Create a virtual mapping cookie for an IO port range */ |
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extern void __iomem *ioport_map(unsigned long port, unsigned int nr); |
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extern void ioport_unmap(void __iomem *); |
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#endif |
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#ifndef ARCH_HAS_IOREMAP_WC |
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#define ioremap_wc ioremap |
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#endif |
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#ifndef ARCH_HAS_IOREMAP_WT |
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#define ioremap_wt ioremap |
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#endif |
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#ifdef CONFIG_PCI |
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/* Destroy a virtual mapping cookie for a PCI BAR (memory or IO) */ |
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struct pci_dev; |
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extern void pci_iounmap(struct pci_dev *dev, void __iomem *); |
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#elif defined(CONFIG_GENERIC_IOMAP) |
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struct pci_dev; |
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static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) |
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{ } |
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#endif |
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#include <asm-generic/pci_iomap.h> |
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#endif
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