/* 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 * Copyright (C) 1999 Asit Mallick * Copyright (C) 1999 Don Dugger */ #include #include /* 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 #include #include #include /* * 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); /* * The following two macros are deprecated and scheduled for removal. * Please use the PCI-DMA interface defined in instead. */ #define bus_to_virt phys_to_virt #define virt_to_bus virt_to_phys #define page_to_bus page_to_phys # 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_nocache (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_nocache ioremap_nocache #define ioremap_cache ioremap_cache #define ioremap_uc ioremap_nocache #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_kmem_ptr xlate_dev_kmem_ptr #define xlate_dev_mem_ptr xlate_dev_mem_ptr #include #undef PCI_IOBASE # endif /* __KERNEL__ */ #endif /* _ASM_IA64_IO_H */