diff options
Diffstat (limited to 'include/asm-ia64/io.h')
| -rw-r--r-- | include/asm-ia64/io.h | 459 |
1 files changed, 0 insertions, 459 deletions
diff --git a/include/asm-ia64/io.h b/include/asm-ia64/io.h deleted file mode 100644 index 260a85ac9d6a..000000000000 --- a/include/asm-ia64/io.h +++ /dev/null @@ -1,459 +0,0 @@ -#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 <davidm@hpl.hp.com> - * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com> - * Copyright (C) 1999 Don Dugger <don.dugger@intel.com> - */ - -/* 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/machvec.h> -#include <asm/page.h> -#include <asm/system.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; -} - -static inline void* -phys_to_virt (unsigned long address) -{ - return (void *) (address + PAGE_OFFSET); -} - -#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 (unsigned long 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 <asm/pci.h> 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() - -/** - * ___ia64_mmiowb - I/O write barrier - * - * Ensure ordering of I/O space writes. This will make sure that writes - * following the barrier will arrive after all previous writes. For most - * ia64 platforms, this is a simple 'mf.a' instruction. - * - * See Documentation/DocBook/deviceiobook.tmpl for more information. - */ -static inline void ___ia64_mmiowb(void) -{ - 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); -} - -#define __ia64_inb ___ia64_inb -#define __ia64_inw ___ia64_inw -#define __ia64_inl ___ia64_inl -#define __ia64_outb ___ia64_outb -#define __ia64_outw ___ia64_outw -#define __ia64_outl ___ia64_outl -#define __ia64_readb ___ia64_readb -#define __ia64_readw ___ia64_readw -#define __ia64_readl ___ia64_readl -#define __ia64_readq ___ia64_readq -#define __ia64_readb_relaxed ___ia64_readb -#define __ia64_readw_relaxed ___ia64_readw -#define __ia64_readl_relaxed ___ia64_readl -#define __ia64_readq_relaxed ___ia64_readq -#define __ia64_writeb ___ia64_writeb -#define __ia64_writew ___ia64_writew -#define __ia64_writel ___ia64_writel -#define __ia64_writeq ___ia64_writeq -#define __ia64_mmiowb ___ia64_mmiowb - -/* - * 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. - */ - -static inline unsigned int -___ia64_inb (unsigned long port) -{ - volatile unsigned char *addr = __ia64_mk_io_addr(port); - unsigned char ret; - - ret = *addr; - __ia64_mf_a(); - return ret; -} - -static inline unsigned int -___ia64_inw (unsigned long port) -{ - volatile unsigned short *addr = __ia64_mk_io_addr(port); - unsigned short ret; - - ret = *addr; - __ia64_mf_a(); - return ret; -} - -static inline unsigned int -___ia64_inl (unsigned long port) -{ - volatile unsigned int *addr = __ia64_mk_io_addr(port); - unsigned int ret; - - ret = *addr; - __ia64_mf_a(); - return ret; -} - -static inline void -___ia64_outb (unsigned char val, unsigned long port) -{ - volatile unsigned char *addr = __ia64_mk_io_addr(port); - - *addr = val; - __ia64_mf_a(); -} - -static inline void -___ia64_outw (unsigned short val, unsigned long port) -{ - volatile unsigned short *addr = __ia64_mk_io_addr(port); - - *addr = val; - __ia64_mf_a(); -} - -static inline void -___ia64_outl (unsigned int val, unsigned long port) -{ - volatile unsigned int *addr = __ia64_mk_io_addr(port); - - *addr = val; - __ia64_mf_a(); -} - -static inline void -__insb (unsigned long port, void *dst, unsigned long count) -{ - unsigned char *dp = dst; - - while (count--) - *dp++ = platform_inb(port); -} - -static inline void -__insw (unsigned long port, void *dst, unsigned long count) -{ - unsigned short *dp = dst; - - while (count--) - *dp++ = platform_inw(port); -} - -static inline void -__insl (unsigned long port, void *dst, unsigned long count) -{ - unsigned int *dp = dst; - - while (count--) - *dp++ = platform_inl(port); -} - -static inline void -__outsb (unsigned long port, const void *src, unsigned long count) -{ - const unsigned char *sp = src; - - while (count--) - platform_outb(*sp++, port); -} - -static inline void -__outsw (unsigned long port, const void *src, unsigned long count) -{ - const unsigned short *sp = src; - - while (count--) - platform_outw(*sp++, port); -} - -static inline void -__outsl (unsigned long port, const void *src, unsigned long count) -{ - const unsigned int *sp = src; - - while (count--) - platform_outl(*sp++, port); -} - -/* - * Unfortunately, some platforms are broken and do not follow the IA-64 architecture - * specification regarding legacy I/O support. Thus, we have to make these operations - * platform dependent... - */ -#define __inb platform_inb -#define __inw platform_inw -#define __inl platform_inl -#define __outb platform_outb -#define __outw platform_outw -#define __outl platform_outl -#define __mmiowb platform_mmiowb - -#define inb(p) __inb(p) -#define inw(p) __inw(p) -#define inl(p) __inl(p) -#define insb(p,d,c) __insb(p,d,c) -#define insw(p,d,c) __insw(p,d,c) -#define insl(p,d,c) __insl(p,d,c) -#define outb(v,p) __outb(v,p) -#define outw(v,p) __outw(v,p) -#define outl(v,p) __outl(v,p) -#define outsb(p,s,c) __outsb(p,s,c) -#define outsw(p,s,c) __outsw(p,s,c) -#define outsl(p,s,c) __outsl(p,s,c) -#define mmiowb() __mmiowb() - -/* - * The address passed to these functions are ioremap()ped already. - * - * We need these to be machine vectors since some platforms don't provide - * DMA coherence via PIO reads (PCI drivers and the spec imply that this is - * a good idea). Writes are ok though for all existing ia64 platforms (and - * hopefully it'll stay that way). - */ -static inline unsigned char -___ia64_readb (const volatile void __iomem *addr) -{ - return *(volatile unsigned char __force *)addr; -} - -static inline unsigned short -___ia64_readw (const volatile void __iomem *addr) -{ - return *(volatile unsigned short __force *)addr; -} - -static inline unsigned int -___ia64_readl (const volatile void __iomem *addr) -{ - return *(volatile unsigned int __force *) addr; -} - -static inline unsigned long -___ia64_readq (const volatile void __iomem *addr) -{ - return *(volatile unsigned long __force *) addr; -} - -static inline void -__writeb (unsigned char val, volatile void __iomem *addr) -{ - *(volatile unsigned char __force *) addr = val; -} - -static inline void -__writew (unsigned short val, volatile void __iomem *addr) -{ - *(volatile unsigned short __force *) addr = val; -} - -static inline void -__writel (unsigned int val, volatile void __iomem *addr) -{ - *(volatile unsigned int __force *) addr = val; -} - -static inline void -__writeq (unsigned long val, volatile void __iomem *addr) -{ - *(volatile unsigned long __force *) addr = val; -} - -#define __readb platform_readb -#define __readw platform_readw -#define __readl platform_readl -#define __readq platform_readq -#define __readb_relaxed platform_readb_relaxed -#define __readw_relaxed platform_readw_relaxed -#define __readl_relaxed platform_readl_relaxed -#define __readq_relaxed platform_readq_relaxed - -#define readb(a) __readb((a)) -#define readw(a) __readw((a)) -#define readl(a) __readl((a)) -#define readq(a) __readq((a)) -#define readb_relaxed(a) __readb_relaxed((a)) -#define readw_relaxed(a) __readw_relaxed((a)) -#define readl_relaxed(a) __readl_relaxed((a)) -#define readq_relaxed(a) __readq_relaxed((a)) -#define __raw_readb readb -#define __raw_readw readw -#define __raw_readl readl -#define __raw_readq readq -#define __raw_readb_relaxed readb_relaxed -#define __raw_readw_relaxed readw_relaxed -#define __raw_readl_relaxed readl_relaxed -#define __raw_readq_relaxed readq_relaxed -#define writeb(v,a) __writeb((v), (a)) -#define writew(v,a) __writew((v), (a)) -#define writel(v,a) __writel((v), (a)) -#define writeq(v,a) __writeq((v), (a)) -#define __raw_writeb writeb -#define __raw_writew writew -#define __raw_writel writel -#define __raw_writeq writeq - -#ifndef inb_p -# define inb_p inb -#endif -#ifndef inw_p -# define inw_p inw -#endif -#ifndef inl_p -# define inl_p inl -#endif - -#ifndef outb_p -# define outb_p outb -#endif -#ifndef outw_p -# define outw_p outw -#endif -#ifndef outl_p -# define outl_p outl -#endif - -# 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); - -/* - * 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); - -# endif /* __KERNEL__ */ - -/* - * Enabling BIO_VMERGE_BOUNDARY forces us to turn off I/O MMU bypassing. It is said that - * BIO-level virtual merging can give up to 4% performance boost (not verified for ia64). - * On the other hand, we know that I/O MMU bypassing gives ~8% performance improvement on - * SPECweb-like workloads on zx1-based machines. Thus, for now we favor I/O MMU bypassing - * over BIO-level virtual merging. - */ -extern unsigned long ia64_max_iommu_merge_mask; -#if 1 -#define BIO_VMERGE_BOUNDARY 0 -#else -/* - * It makes no sense at all to have this BIO_VMERGE_BOUNDARY macro here. Should be - * replaced by dma_merge_mask() or something of that sort. Note: the only way - * BIO_VMERGE_BOUNDARY is used is to mask off bits. Effectively, our definition gets - * expanded into: - * - * addr & ((ia64_max_iommu_merge_mask + 1) - 1) == (addr & ia64_max_iommu_vmerge_mask) - * - * which is precisely what we want. - */ -#define BIO_VMERGE_BOUNDARY (ia64_max_iommu_merge_mask + 1) -#endif - -#endif /* _ASM_IA64_IO_H */ |
