| /* |
| * linux/include/asm-arm/io.h |
| * |
| * Copyright (C) 1996-2000 Russell King |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * Modifications: |
| * 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both |
| * constant addresses and variable addresses. |
| * 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture |
| * specific IO header files. |
| * 27-Mar-1999 PJB Second parameter of memcpy_toio is const.. |
| * 04-Apr-1999 PJB Added check_signature. |
| * 12-Dec-1999 RMK More cleanups |
| * 18-Jun-2000 RMK Removed virt_to_* and friends definitions |
| */ |
| #ifndef __ASM_ARM_IO_H |
| #define __ASM_ARM_IO_H |
| |
| #ifdef __KERNEL__ |
| |
| #include <linux/config.h> |
| #include <linux/types.h> |
| #include <asm/byteorder.h> |
| #include <asm/memory.h> |
| #include <asm/hardware.h> |
| |
| /* |
| * Generic IO read/write. These perform native-endian accesses. Note |
| * that some architectures will want to re-define __raw_{read,write}w. |
| */ |
| extern void __raw_writesb(unsigned int addr, const void *data, int bytelen); |
| extern void __raw_writesw(unsigned int addr, const void *data, int wordlen); |
| extern void __raw_writesl(unsigned int addr, const void *data, int longlen); |
| |
| extern void __raw_readsb(unsigned int addr, void *data, int bytelen); |
| extern void __raw_readsw(unsigned int addr, void *data, int wordlen); |
| extern void __raw_readsl(unsigned int addr, void *data, int longlen); |
| |
| #define __raw_writeb(v,a) (*(volatile unsigned char *)(a) = (v)) |
| #define __raw_writew(v,a) (*(volatile unsigned short *)(a) = (v)) |
| #define __raw_writel(v,a) (*(volatile unsigned int *)(a) = (v)) |
| |
| #define __raw_readb(a) (*(volatile unsigned char *)(a)) |
| #define __raw_readw(a) (*(volatile unsigned short *)(a)) |
| #define __raw_readl(a) (*(volatile unsigned int *)(a)) |
| |
| |
| /* |
| * Bad read/write accesses... |
| */ |
| extern void __readwrite_bug(const char *fn); |
| |
| /* |
| * Now, pick up the machine-defined IO definitions |
| */ |
| |
| #define IO_SPACE_LIMIT 0xffffffff |
| |
| /* |
| * GCC is totally crap at loading/storing data. We try to persuade it |
| * to do the right thing by using these whereever possible instead of |
| * the above. |
| */ |
| #define __arch_base_getb(b,o) \ |
| ({ \ |
| unsigned int v, r = (b); \ |
| __asm__ __volatile__( \ |
| "ldrb %0, [%1, %2]" \ |
| : "=r" (v) \ |
| : "r" (r), "Ir" (o)); \ |
| v; \ |
| }) |
| |
| #define __arch_base_getl(b,o) \ |
| ({ \ |
| unsigned int v, r = (b); \ |
| __asm__ __volatile__( \ |
| "ldr %0, [%1, %2]" \ |
| : "=r" (v) \ |
| : "r" (r), "Ir" (o)); \ |
| v; \ |
| }) |
| |
| #define __arch_base_putb(v,b,o) \ |
| ({ \ |
| unsigned int r = (b); \ |
| __asm__ __volatile__( \ |
| "strb %0, [%1, %2]" \ |
| : \ |
| : "r" (v), "r" (r), "Ir" (o)); \ |
| }) |
| |
| #define __arch_base_putl(v,b,o) \ |
| ({ \ |
| unsigned int r = (b); \ |
| __asm__ __volatile__( \ |
| "str %0, [%1, %2]" \ |
| : \ |
| : "r" (v), "r" (r), "Ir" (o)); \ |
| }) |
| |
| /* |
| * We use two different types of addressing - PC style addresses, and ARM |
| * addresses. PC style accesses the PC hardware with the normal PC IO |
| * addresses, eg 0x3f8 for serial#1. ARM addresses are 0x80000000+ |
| * and are translated to the start of IO. Note that all addresses are |
| * shifted left! |
| */ |
| #define __PORT_PCIO(x) (!((x) & 0x80000000)) |
| |
| /* |
| * Dynamic IO functions - let the compiler |
| * optimize the expressions |
| */ |
| static inline void __outb (unsigned int value, unsigned int port) |
| { |
| unsigned long temp; |
| __asm__ __volatile__( |
| "tst %2, #0x80000000\n\t" |
| "mov %0, %4\n\t" |
| "addeq %0, %0, %3\n\t" |
| "strb %1, [%0, %2, lsl #2] @ outb" |
| : "=&r" (temp) |
| : "r" (value), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE) |
| : "cc"); |
| } |
| |
| static inline void __outw (unsigned int value, unsigned int port) |
| { |
| unsigned long temp; |
| __asm__ __volatile__( |
| "tst %2, #0x80000000\n\t" |
| "mov %0, %4\n\t" |
| "addeq %0, %0, %3\n\t" |
| "str %1, [%0, %2, lsl #2] @ outw" |
| : "=&r" (temp) |
| : "r" (value|value<<16), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE) |
| : "cc"); |
| } |
| |
| static inline void __outl (unsigned int value, unsigned int port) |
| { |
| unsigned long temp; |
| __asm__ __volatile__( |
| "tst %2, #0x80000000\n\t" |
| "mov %0, %4\n\t" |
| "addeq %0, %0, %3\n\t" |
| "str %1, [%0, %2, lsl #2] @ outl" |
| : "=&r" (temp) |
| : "r" (value), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE) |
| : "cc"); |
| } |
| |
| #define DECLARE_DYN_IN(sz,fnsuffix,instr) \ |
| static inline unsigned sz __in##fnsuffix (unsigned int port) \ |
| { \ |
| unsigned long temp, value; \ |
| __asm__ __volatile__( \ |
| "tst %2, #0x80000000\n\t" \ |
| "mov %0, %4\n\t" \ |
| "addeq %0, %0, %3\n\t" \ |
| "ldr" instr " %1, [%0, %2, lsl #2] @ in" #fnsuffix \ |
| : "=&r" (temp), "=r" (value) \ |
| : "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE) \ |
| : "cc"); \ |
| return (unsigned sz)value; \ |
| } |
| |
| static inline unsigned int __ioaddr (unsigned int port) \ |
| { \ |
| if (__PORT_PCIO(port)) \ |
| return (unsigned int)(PCIO_BASE + (port << 2)); \ |
| else \ |
| return (unsigned int)(IO_BASE + (port << 2)); \ |
| } |
| |
| #define DECLARE_IO(sz,fnsuffix,instr) \ |
| DECLARE_DYN_IN(sz,fnsuffix,instr) |
| |
| DECLARE_IO(char,b,"b") |
| DECLARE_IO(short,w,"") |
| DECLARE_IO(int,l,"") |
| |
| #undef DECLARE_IO |
| #undef DECLARE_DYN_IN |
| |
| /* |
| * Constant address IO functions |
| * |
| * These have to be macros for the 'J' constraint to work - |
| * +/-4096 immediate operand. |
| */ |
| #define __outbc(value,port) \ |
| ({ \ |
| if (__PORT_PCIO((port))) \ |
| __asm__ __volatile__( \ |
| "strb %0, [%1, %2] @ outbc" \ |
| : : "r" (value), "r" (PCIO_BASE), "Jr" ((port) << 2)); \ |
| else \ |
| __asm__ __volatile__( \ |
| "strb %0, [%1, %2] @ outbc" \ |
| : : "r" (value), "r" (IO_BASE), "r" ((port) << 2)); \ |
| }) |
| |
| #define __inbc(port) \ |
| ({ \ |
| unsigned char result; \ |
| if (__PORT_PCIO((port))) \ |
| __asm__ __volatile__( \ |
| "ldrb %0, [%1, %2] @ inbc" \ |
| : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2)); \ |
| else \ |
| __asm__ __volatile__( \ |
| "ldrb %0, [%1, %2] @ inbc" \ |
| : "=r" (result) : "r" (IO_BASE), "r" ((port) << 2)); \ |
| result; \ |
| }) |
| |
| #define __outwc(value,port) \ |
| ({ \ |
| unsigned long v = value; \ |
| if (__PORT_PCIO((port))) \ |
| __asm__ __volatile__( \ |
| "str %0, [%1, %2] @ outwc" \ |
| : : "r" (v|v<<16), "r" (PCIO_BASE), "Jr" ((port) << 2)); \ |
| else \ |
| __asm__ __volatile__( \ |
| "str %0, [%1, %2] @ outwc" \ |
| : : "r" (v|v<<16), "r" (IO_BASE), "r" ((port) << 2)); \ |
| }) |
| |
| #define __inwc(port) \ |
| ({ \ |
| unsigned short result; \ |
| if (__PORT_PCIO((port))) \ |
| __asm__ __volatile__( \ |
| "ldr %0, [%1, %2] @ inwc" \ |
| : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2)); \ |
| else \ |
| __asm__ __volatile__( \ |
| "ldr %0, [%1, %2] @ inwc" \ |
| : "=r" (result) : "r" (IO_BASE), "r" ((port) << 2)); \ |
| result & 0xffff; \ |
| }) |
| |
| #define __outlc(value,port) \ |
| ({ \ |
| unsigned long v = value; \ |
| if (__PORT_PCIO((port))) \ |
| __asm__ __volatile__( \ |
| "str %0, [%1, %2] @ outlc" \ |
| : : "r" (v), "r" (PCIO_BASE), "Jr" ((port) << 2)); \ |
| else \ |
| __asm__ __volatile__( \ |
| "str %0, [%1, %2] @ outlc" \ |
| : : "r" (v), "r" (IO_BASE), "r" ((port) << 2)); \ |
| }) |
| |
| #define __inlc(port) \ |
| ({ \ |
| unsigned long result; \ |
| if (__PORT_PCIO((port))) \ |
| __asm__ __volatile__( \ |
| "ldr %0, [%1, %2] @ inlc" \ |
| : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2)); \ |
| else \ |
| __asm__ __volatile__( \ |
| "ldr %0, [%1, %2] @ inlc" \ |
| : "=r" (result) : "r" (IO_BASE), "r" ((port) << 2)); \ |
| result; \ |
| }) |
| |
| #define __ioaddrc(port) \ |
| ({ \ |
| unsigned long addr; \ |
| if (__PORT_PCIO((port))) \ |
| addr = PCIO_BASE + ((port) << 2); \ |
| else \ |
| addr = IO_BASE + ((port) << 2); \ |
| addr; \ |
| }) |
| |
| #define inb(p) (__builtin_constant_p((p)) ? __inbc(p) : __inb(p)) |
| #define inw(p) (__builtin_constant_p((p)) ? __inwc(p) : __inw(p)) |
| #define inl(p) (__builtin_constant_p((p)) ? __inlc(p) : __inl(p)) |
| #define outb(v,p) (__builtin_constant_p((p)) ? __outbc(v,p) : __outb(v,p)) |
| #define outw(v,p) (__builtin_constant_p((p)) ? __outwc(v,p) : __outw(v,p)) |
| #define outl(v,p) (__builtin_constant_p((p)) ? __outlc(v,p) : __outl(v,p)) |
| #define __ioaddr(p) (__builtin_constant_p((p)) ? __ioaddr(p) : __ioaddrc(p)) |
| |
| /* JMA 18.02.03 added sb,sl from arm/io.h, changing io to ioaddr */ |
| |
| #define outsb(p,d,l) __raw_writesb(__ioaddr(p),d,l) |
| #define outsw(p,d,l) __raw_writesw(__ioaddr(p),d,l) |
| #define outsl(p,d,l) __raw_writesl(__ioaddr(p),d,l) |
| |
| #define insb(p,d,l) __raw_readsb(__ioaddr(p),d,l) |
| #define insw(p,d,l) __raw_readsw(__ioaddr(p),d,l) |
| #define insl(p,d,l) __raw_readsl(__ioaddr(p),d,l) |
| |
| #define insw(p,d,l) __raw_readsw(__ioaddr(p),d,l) |
| #define outsw(p,d,l) __raw_writesw(__ioaddr(p),d,l) |
| |
| #define readb(c) (__readwrite_bug("readb"),0) |
| #define readw(c) (__readwrite_bug("readw"),0) |
| #define readl(c) (__readwrite_bug("readl"),0) |
| #define readb_relaxed(addr) readb(addr) |
| #define readw_relaxed(addr) readw(addr) |
| #define readl_relaxed(addr) readl(addr) |
| #define writeb(v,c) __readwrite_bug("writeb") |
| #define writew(v,c) __readwrite_bug("writew") |
| #define writel(v,c) __readwrite_bug("writel") |
| |
| #define readsw(p,d,l) (__readwrite_bug("readsw"),0) |
| #define readsl(p,d,l) (__readwrite_bug("readsl"),0) |
| #define writesw(p,d,l) __readwrite_bug("writesw") |
| #define writesl(p,d,l) __readwrite_bug("writesl") |
| |
| #define mmiowb() |
| |
| /* the following macro is depreciated */ |
| #define ioaddr(port) __ioaddr((port)) |
| |
| /* |
| * No ioremap support here. |
| */ |
| #define __arch_ioremap(c,s,f,a) ((void *)(c)) |
| #define __arch_iounmap(c) do { } while (0) |
| |
| |
| #if defined(__arch_putb) || defined(__arch_putw) || defined(__arch_putl) || \ |
| defined(__arch_getb) || defined(__arch_getw) || defined(__arch_getl) |
| #warning machine class uses old __arch_putw or __arch_getw |
| #endif |
| |
| /* |
| * IO port access primitives |
| * ------------------------- |
| * |
| * The ARM doesn't have special IO access instructions; all IO is memory |
| * mapped. Note that these are defined to perform little endian accesses |
| * only. Their primary purpose is to access PCI and ISA peripherals. |
| * |
| * Note that for a big endian machine, this implies that the following |
| * big endian mode connectivity is in place, as described by numerious |
| * ARM documents: |
| * |
| * PCI: D0-D7 D8-D15 D16-D23 D24-D31 |
| * ARM: D24-D31 D16-D23 D8-D15 D0-D7 |
| * |
| * The machine specific io.h include defines __io to translate an "IO" |
| * address to a memory address. |
| * |
| * Note that we prevent GCC re-ordering or caching values in expressions |
| * by introducing sequence points into the in*() definitions. Note that |
| * __raw_* do not guarantee this behaviour. |
| */ |
| /* |
| #define outsb(p,d,l) __raw_writesb(__io(p),d,l) |
| #define outsw(p,d,l) __raw_writesw(__io(p),d,l) |
| |
| #define insb(p,d,l) __raw_readsb(__io(p),d,l) |
| #define insw(p,d,l) __raw_readsw(__io(p),d,l) |
| */ |
| #define outb_p(val,port) outb((val),(port)) |
| #define outw_p(val,port) outw((val),(port)) |
| #define inb_p(port) inb((port)) |
| #define inw_p(port) inw((port)) |
| #define inl_p(port) inl((port)) |
| |
| #define outsb_p(port,from,len) outsb(port,from,len) |
| #define outsw_p(port,from,len) outsw(port,from,len) |
| #define insb_p(port,to,len) insb(port,to,len) |
| #define insw_p(port,to,len) insw(port,to,len) |
| |
| /* |
| * String version of IO memory access ops: |
| */ |
| extern void _memcpy_fromio(void *, unsigned long, size_t); |
| extern void _memcpy_toio(unsigned long, const void *, size_t); |
| extern void _memset_io(unsigned long, int, size_t); |
| |
| /* |
| * ioremap and friends. |
| * |
| * ioremap takes a PCI memory address, as specified in |
| * Documentation/IO-mapping.txt. |
| */ |
| extern void * __ioremap(unsigned long, size_t, unsigned long, unsigned long); |
| extern void __iounmap(void *addr); |
| |
| #ifndef __arch_ioremap |
| #define ioremap(cookie,size) __ioremap(cookie,size,0,1) |
| #define ioremap_nocache(cookie,size) __ioremap(cookie,size,0,1) |
| #define iounmap(cookie) __iounmap(cookie) |
| #else |
| #define ioremap(cookie,size) __arch_ioremap((cookie),(size),0,1) |
| #define ioremap_nocache(cookie,size) __arch_ioremap((cookie),(size),0,1) |
| #define iounmap(cookie) __arch_iounmap(cookie) |
| #endif |
| |
| /* |
| * DMA-consistent mapping functions. These allocate/free a region of |
| * uncached, unwrite-buffered mapped memory space for use with DMA |
| * devices. This is the "generic" version. The PCI specific version |
| * is in pci.h |
| */ |
| extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *handle); |
| extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle); |
| extern void consistent_sync(void *vaddr, size_t size, int rw); |
| |
| /* |
| * can the hardware map this into one segment or not, given no other |
| * constraints. |
| */ |
| #define BIOVEC_MERGEABLE(vec1, vec2) \ |
| ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2))) |
| |
| /* |
| * Convert a physical pointer to a virtual kernel pointer for /dev/mem |
| * access |
| */ |
| #define xlate_dev_mem_ptr(p) __va(p) |
| |
| /* |
| * Convert a virtual cached pointer to an uncached pointer |
| */ |
| #define xlate_dev_kmem_ptr(p) p |
| |
| #endif /* __KERNEL__ */ |
| #endif /* __ASM_ARM_IO_H */ |
