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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef _ASM_IA64_IO_H
- #define _ASM_IA64_IO_H
- /*
- * This file contains the definitions for the emulated IO instructions
- * inb/inw/inl/outb/outw/outl and the "string versions" of the same
- * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing"
- * versions of the single-IO instructions (inb_p/inw_p/..).
- *
- * This file is not meant to be obfuscating: it's just complicated to
- * (a) handle it all in a way that makes gcc able to optimize it as
- * well as possible and (b) trying to avoid writing the same thing
- * over and over again with slight variations and possibly making a
- * mistake somewhere.
- *
- * Copyright (C) 1998-2003 Hewlett-Packard Co
- * David Mosberger-Tang <[email protected]>
- * Copyright (C) 1999 Asit Mallick <[email protected]>
- * Copyright (C) 1999 Don Dugger <[email protected]>
- */
- #include <asm/unaligned.h>
- #include <asm/early_ioremap.h>
- /* We don't use IO slowdowns on the ia64, but.. */
- #define __SLOW_DOWN_IO do { } while (0)
- #define SLOW_DOWN_IO do { } while (0)
- #define __IA64_UNCACHED_OFFSET RGN_BASE(RGN_UNCACHED)
- /*
- * The legacy I/O space defined by the ia64 architecture supports only 65536 ports, but
- * large machines may have multiple other I/O spaces so we can't place any a priori limit
- * on IO_SPACE_LIMIT. These additional spaces are described in ACPI.
- */
- #define IO_SPACE_LIMIT 0xffffffffffffffffUL
- #define MAX_IO_SPACES_BITS 8
- #define MAX_IO_SPACES (1UL << MAX_IO_SPACES_BITS)
- #define IO_SPACE_BITS 24
- #define IO_SPACE_SIZE (1UL << IO_SPACE_BITS)
- #define IO_SPACE_NR(port) ((port) >> IO_SPACE_BITS)
- #define IO_SPACE_BASE(space) ((space) << IO_SPACE_BITS)
- #define IO_SPACE_PORT(port) ((port) & (IO_SPACE_SIZE - 1))
- #define IO_SPACE_SPARSE_ENCODING(p) ((((p) >> 2) << 12) | ((p) & 0xfff))
- struct io_space {
- unsigned long mmio_base; /* base in MMIO space */
- int sparse;
- };
- extern struct io_space io_space[];
- extern unsigned int num_io_spaces;
- # ifdef __KERNEL__
- /*
- * All MMIO iomem cookies are in region 6; anything less is a PIO cookie:
- * 0xCxxxxxxxxxxxxxxx MMIO cookie (return from ioremap)
- * 0x000000001SPPPPPP PIO cookie (S=space number, P..P=port)
- *
- * ioread/writeX() uses the leading 1 in PIO cookies (PIO_OFFSET) to catch
- * code that uses bare port numbers without the prerequisite pci_iomap().
- */
- #define PIO_OFFSET (1UL << (MAX_IO_SPACES_BITS + IO_SPACE_BITS))
- #define PIO_MASK (PIO_OFFSET - 1)
- #define PIO_RESERVED __IA64_UNCACHED_OFFSET
- #define HAVE_ARCH_PIO_SIZE
- #include <asm/intrinsics.h>
- #include <asm/page.h>
- #include <asm-generic/iomap.h>
- /*
- * Change virtual addresses to physical addresses and vv.
- */
- static inline unsigned long
- virt_to_phys (volatile void *address)
- {
- return (unsigned long) address - PAGE_OFFSET;
- }
- #define virt_to_phys virt_to_phys
- static inline void*
- phys_to_virt (unsigned long address)
- {
- return (void *) (address + PAGE_OFFSET);
- }
- #define phys_to_virt phys_to_virt
- #define ARCH_HAS_VALID_PHYS_ADDR_RANGE
- extern u64 kern_mem_attribute (unsigned long phys_addr, unsigned long size);
- extern int valid_phys_addr_range (phys_addr_t addr, size_t count); /* efi.c */
- extern int valid_mmap_phys_addr_range (unsigned long pfn, size_t count);
- # endif /* KERNEL */
- /*
- * Memory fence w/accept. This should never be used in code that is
- * not IA-64 specific.
- */
- #define __ia64_mf_a() ia64_mfa()
- static inline void*
- __ia64_mk_io_addr (unsigned long port)
- {
- struct io_space *space;
- unsigned long offset;
- space = &io_space[IO_SPACE_NR(port)];
- port = IO_SPACE_PORT(port);
- if (space->sparse)
- offset = IO_SPACE_SPARSE_ENCODING(port);
- else
- offset = port;
- return (void *) (space->mmio_base | offset);
- }
- /*
- * For the in/out routines, we need to do "mf.a" _after_ doing the I/O access to ensure
- * that the access has completed before executing other I/O accesses. Since we're doing
- * the accesses through an uncachable (UC) translation, the CPU will execute them in
- * program order. However, we still need to tell the compiler not to shuffle them around
- * during optimization, which is why we use "volatile" pointers.
- */
- #define inb inb
- static inline unsigned int inb(unsigned long port)
- {
- volatile unsigned char *addr = __ia64_mk_io_addr(port);
- unsigned char ret;
- ret = *addr;
- __ia64_mf_a();
- return ret;
- }
- #define inw inw
- static inline unsigned int inw(unsigned long port)
- {
- volatile unsigned short *addr = __ia64_mk_io_addr(port);
- unsigned short ret;
- ret = *addr;
- __ia64_mf_a();
- return ret;
- }
- #define inl inl
- static inline unsigned int inl(unsigned long port)
- {
- volatile unsigned int *addr = __ia64_mk_io_addr(port);
- unsigned int ret;
- ret = *addr;
- __ia64_mf_a();
- return ret;
- }
- #define outb outb
- static inline void outb(unsigned char val, unsigned long port)
- {
- volatile unsigned char *addr = __ia64_mk_io_addr(port);
- *addr = val;
- __ia64_mf_a();
- }
- #define outw outw
- static inline void outw(unsigned short val, unsigned long port)
- {
- volatile unsigned short *addr = __ia64_mk_io_addr(port);
- *addr = val;
- __ia64_mf_a();
- }
- #define outl outl
- static inline void outl(unsigned int val, unsigned long port)
- {
- volatile unsigned int *addr = __ia64_mk_io_addr(port);
- *addr = val;
- __ia64_mf_a();
- }
- #define insb insb
- static inline void insb(unsigned long port, void *dst, unsigned long count)
- {
- unsigned char *dp = dst;
- while (count--)
- *dp++ = inb(port);
- }
- #define insw insw
- static inline void insw(unsigned long port, void *dst, unsigned long count)
- {
- unsigned short *dp = dst;
- while (count--)
- put_unaligned(inw(port), dp++);
- }
- #define insl insl
- static inline void insl(unsigned long port, void *dst, unsigned long count)
- {
- unsigned int *dp = dst;
- while (count--)
- put_unaligned(inl(port), dp++);
- }
- #define outsb outsb
- static inline void outsb(unsigned long port, const void *src,
- unsigned long count)
- {
- const unsigned char *sp = src;
- while (count--)
- outb(*sp++, port);
- }
- #define outsw outsw
- static inline void outsw(unsigned long port, const void *src,
- unsigned long count)
- {
- const unsigned short *sp = src;
- while (count--)
- outw(get_unaligned(sp++), port);
- }
- #define outsl outsl
- static inline void outsl(unsigned long port, const void *src,
- unsigned long count)
- {
- const unsigned int *sp = src;
- while (count--)
- outl(get_unaligned(sp++), port);
- }
- # ifdef __KERNEL__
- extern void __iomem * ioremap(unsigned long offset, unsigned long size);
- extern void __iomem * ioremap_uc(unsigned long offset, unsigned long size);
- extern void iounmap (volatile void __iomem *addr);
- static inline void __iomem * ioremap_cache (unsigned long phys_addr, unsigned long size)
- {
- return ioremap(phys_addr, size);
- }
- #define ioremap ioremap
- #define ioremap_cache ioremap_cache
- #define ioremap_uc ioremap_uc
- #define iounmap iounmap
- /*
- * String version of IO memory access ops:
- */
- extern void memcpy_fromio(void *dst, const volatile void __iomem *src, long n);
- extern void memcpy_toio(volatile void __iomem *dst, const void *src, long n);
- extern void memset_io(volatile void __iomem *s, int c, long n);
- #define memcpy_fromio memcpy_fromio
- #define memcpy_toio memcpy_toio
- #define memset_io memset_io
- #define xlate_dev_mem_ptr xlate_dev_mem_ptr
- #include <asm-generic/io.h>
- #undef PCI_IOBASE
- # endif /* __KERNEL__ */
- #endif /* _ASM_IA64_IO_H */
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