| #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) 1998-2001 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 0xc000000000000000 /* region 6 */ |
| |
| /* |
| * 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 |
| |
| # ifdef __KERNEL__ |
| |
| #include <asm/machvec.h> |
| #include <asm/page.h> |
| #include <asm/system.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); |
| } |
| |
| /* |
| * 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() __asm__ __volatile__ ("mf.a" ::: "memory") |
| |
| /** |
| * __ia64_mmiob - I/O space memory barrier |
| * |
| * Acts as a memory mapped I/O barrier for platforms that queue writes to |
| * I/O space. This ensures that subsequent writes to I/O space arrive after |
| * all previous writes. For most ia64 platforms, this is a simple |
| * 'mf.a' instruction, so the address is ignored. For other platforms, |
| * the address may be required to ensure proper ordering of writes to I/O space |
| * since a 'dummy' read might be necessary to barrier the write operation. |
| */ |
| static inline void |
| __ia64_mmiob (void) |
| { |
| __ia64_mf_a(); |
| } |
| |
| static inline const unsigned long |
| __ia64_get_io_port_base (void) |
| { |
| extern unsigned long ia64_iobase; |
| |
| return ia64_iobase; |
| } |
| |
| static inline void* |
| __ia64_mk_io_addr (unsigned long port) |
| { |
| const unsigned long io_base = __ia64_get_io_port_base(); |
| unsigned long addr; |
| |
| addr = io_base | ((port >> 2) << 12) | (port & 0xfff); |
| return (void *) addr; |
| } |
| |
| /* |
| * 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; |
| |
| if (platform_inb == __ia64_inb) { |
| volatile unsigned char *addr = __ia64_mk_io_addr(port); |
| |
| __ia64_mf_a(); |
| while (count--) |
| *dp++ = *addr; |
| __ia64_mf_a(); |
| } else |
| while (count--) |
| *dp++ = platform_inb(port); |
| return; |
| } |
| |
| static inline void |
| __insw (unsigned long port, void *dst, unsigned long count) |
| { |
| unsigned short *dp = dst; |
| |
| if (platform_inw == __ia64_inw) { |
| volatile unsigned short *addr = __ia64_mk_io_addr(port); |
| |
| __ia64_mf_a(); |
| while (count--) |
| *dp++ = *addr; |
| __ia64_mf_a(); |
| } else |
| while (count--) |
| *dp++ = platform_inw(port); |
| return; |
| } |
| |
| static inline void |
| __insl (unsigned long port, void *dst, unsigned long count) |
| { |
| unsigned int *dp = dst; |
| |
| if (platform_inl == __ia64_inl) { |
| volatile unsigned int *addr = __ia64_mk_io_addr(port); |
| |
| __ia64_mf_a(); |
| while (count--) |
| *dp++ = *addr; |
| __ia64_mf_a(); |
| } else |
| while (count--) |
| *dp++ = platform_inl(port); |
| return; |
| } |
| |
| static inline void |
| __outsb (unsigned long port, const void *src, unsigned long count) |
| { |
| const unsigned char *sp = src; |
| |
| if (platform_outb == __ia64_outb) { |
| volatile unsigned char *addr = __ia64_mk_io_addr(port); |
| |
| while (count--) |
| *addr = *sp++; |
| __ia64_mf_a(); |
| } else |
| while (count--) |
| platform_outb(*sp++, port); |
| return; |
| } |
| |
| static inline void |
| __outsw (unsigned long port, const void *src, unsigned long count) |
| { |
| const unsigned short *sp = src; |
| |
| if (platform_outw == __ia64_outw) { |
| volatile unsigned short *addr = __ia64_mk_io_addr(port); |
| |
| while (count--) |
| *addr = *sp++; |
| __ia64_mf_a(); |
| } else |
| while (count--) |
| platform_outw(*sp++, port); |
| return; |
| } |
| |
| static inline void |
| __outsl (unsigned long port, void *src, unsigned long count) |
| { |
| const unsigned int *sp = src; |
| |
| if (platform_outl == __ia64_outl) { |
| volatile unsigned int *addr = __ia64_mk_io_addr(port); |
| |
| while (count--) |
| *addr = *sp++; |
| __ia64_mf_a(); |
| } else |
| while (count--) |
| platform_outl(*sp++, port); |
| return; |
| } |
| |
| /* |
| * 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 __mmiob platform_mmiob |
| |
| #define inb __inb |
| #define inw __inw |
| #define inl __inl |
| #define insb __insb |
| #define insw __insw |
| #define insl __insl |
| #define outb __outb |
| #define outw __outw |
| #define outl __outl |
| #define outsb __outsb |
| #define outsw __outsw |
| #define outsl __outsl |
| #define mmiob __mmiob |
| |
| /* |
| * The address passed to these functions are ioremap()ped already. |
| */ |
| static inline unsigned char |
| __readb (void *addr) |
| { |
| return *(volatile unsigned char *)addr; |
| } |
| |
| static inline unsigned short |
| __readw (void *addr) |
| { |
| return *(volatile unsigned short *)addr; |
| } |
| |
| static inline unsigned int |
| __readl (void *addr) |
| { |
| return *(volatile unsigned int *) addr; |
| } |
| |
| static inline unsigned long |
| __readq (void *addr) |
| { |
| return *(volatile unsigned long *) addr; |
| } |
| |
| static inline void |
| __writeb (unsigned char val, void *addr) |
| { |
| *(volatile unsigned char *) addr = val; |
| } |
| |
| static inline void |
| __writew (unsigned short val, void *addr) |
| { |
| *(volatile unsigned short *) addr = val; |
| } |
| |
| static inline void |
| __writel (unsigned int val, void *addr) |
| { |
| *(volatile unsigned int *) addr = val; |
| } |
| |
| static inline void |
| __writeq (unsigned long val, void *addr) |
| { |
| *(volatile unsigned long *) addr = val; |
| } |
| |
| #define readb(a) __readb((void *)(a)) |
| #define readw(a) __readw((void *)(a)) |
| #define readl(a) __readl((void *)(a)) |
| #define readq(a) __readq((void *)(a)) |
| #define __raw_readb readb |
| #define __raw_readw readw |
| #define __raw_readl readl |
| #define __raw_readq readq |
| #define writeb(v,a) __writeb((v), (void *) (a)) |
| #define writew(v,a) __writew((v), (void *) (a)) |
| #define writel(v,a) __writel((v), (void *) (a)) |
| #define writeq(v,a) __writeq((v), (void *) (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 |
| |
| /* |
| * An "address" in IO memory space is not clearly either an integer or a pointer. We will |
| * accept both, thus the casts. |
| * |
| * On ia-64, we access the physical I/O memory space through the uncached kernel region. |
| */ |
| static inline void * |
| ioremap (unsigned long offset, unsigned long size) |
| { |
| return (void *) (__IA64_UNCACHED_OFFSET | (offset)); |
| } |
| |
| static inline void |
| iounmap (void *addr) |
| { |
| } |
| |
| #define ioremap_nocache(o,s) ioremap(o,s) |
| |
| # ifdef __KERNEL__ |
| |
| /* |
| * String version of IO memory access ops: |
| */ |
| extern void __ia64_memcpy_fromio (void *, unsigned long, long); |
| extern void __ia64_memcpy_toio (unsigned long, void *, long); |
| extern void __ia64_memset_c_io (unsigned long, unsigned long, long); |
| |
| #define memcpy_fromio(to,from,len) \ |
| __ia64_memcpy_fromio((to),(unsigned long)(from),(len)) |
| #define memcpy_toio(to,from,len) \ |
| __ia64_memcpy_toio((unsigned long)(to),(from),(len)) |
| #define memset_io(addr,c,len) \ |
| __ia64_memset_c_io((unsigned long)(addr),0x0101010101010101UL*(u8)(c),(len)) |
| |
| |
| #define dma_cache_inv(_start,_size) do { } while (0) |
| #define dma_cache_wback(_start,_size) do { } while (0) |
| #define dma_cache_wback_inv(_start,_size) do { } while (0) |
| |
| # endif /* __KERNEL__ */ |
| |
| #endif /* _ASM_IA64_IO_H */ |