1#ifndef _ASM_IO_H 2#define _ASM_IO_H 3 4/* USE_HPPA_IOREMAP IS THE MAGIC FLAG TO ENABLE OR DISABLE REAL IOREMAP() FUNCTIONALITY */ 5/* FOR 712 or 715 MACHINES THIS SHOULD BE ENABLED, 6 NEWER MACHINES STILL HAVE SOME ISSUES IN THE SCSI AND/OR NETWORK DRIVERS AND 7 BECAUSE OF THAT I WILL LEAVE IT DISABLED FOR NOW <deller@gmx.de> */ 8/* WHEN THOSE ISSUES ARE SOLVED, USE_HPPA_IOREMAP WILL GO AWAY */ 9#define USE_HPPA_IOREMAP 0 10 11 12#include <linux/config.h> 13#include <linux/types.h> 14#include <asm/pgtable.h> 15 16#define virt_to_phys(a) ((unsigned long)__pa(a)) 17#define phys_to_virt(a) __va(a) 18#define virt_to_bus virt_to_phys 19#define bus_to_virt phys_to_virt 20 21/* Memory mapped IO */ 22 23extern void * __ioremap(unsigned long offset, unsigned long size, unsigned long flags); 24 25extern inline void * ioremap(unsigned long offset, unsigned long size) 26{ 27 return __ioremap(offset, size, 0); 28} 29 30/* 31 * This one maps high address device memory and turns off caching for that area. 32 * it's useful if some control registers are in such an area and write combining 33 * or read caching is not desirable: 34 */ 35extern inline void * ioremap_nocache (unsigned long offset, unsigned long size) 36{ 37 return __ioremap(offset, size, _PAGE_NO_CACHE /* _PAGE_PCD */); 38} 39 40extern void iounmap(void *addr); 41 42/* 43 * __raw_ variants have no defined meaning. on hppa, it means `i was 44 * too lazy to ioremap first'. kind of like isa_, except that there's 45 * no additional base address to add on. 46 */ 47extern __inline__ unsigned char __raw_readb(unsigned long addr) 48{ 49 long flags; 50 unsigned char ret; 51 52 __asm__ __volatile__( 53 " rsm 2,%0\n" 54 " ldbx 0(%2),%1\n" 55 " mtsm %0\n" 56 : "=&r" (flags), "=r" (ret) : "r" (addr) ); 57 58 return ret; 59} 60 61extern __inline__ unsigned short __raw_readw(unsigned long addr) 62{ 63 long flags; 64 unsigned short ret; 65 66 __asm__ __volatile__( 67 " rsm 2,%0\n" 68 " ldhx 0(%2),%1\n" 69 " mtsm %0\n" 70 : "=&r" (flags), "=r" (ret) : "r" (addr) ); 71 72 return ret; 73} 74 75extern __inline__ unsigned int __raw_readl(unsigned long addr) 76{ 77 u32 ret; 78 79 __asm__ __volatile__( 80 " ldwax 0(%1),%0\n" 81 : "=r" (ret) : "r" (addr) ); 82 83 return ret; 84} 85 86extern __inline__ unsigned long long __raw_readq(unsigned long addr) 87{ 88 unsigned long long ret; 89#ifdef __LP64__ 90 __asm__ __volatile__( 91 " ldda 0(%1),%0\n" 92 : "=r" (ret) : "r" (addr) ); 93#else 94 /* two reads may have side effects.. */ 95 ret = ((u64) __raw_readl(addr)) << 32; 96 ret |= __raw_readl(addr+4); 97#endif 98 return ret; 99} 100 101extern __inline__ void __raw_writeb(unsigned char val, unsigned long addr) 102{ 103 long flags; 104 __asm__ __volatile__( 105 " rsm 2,%0\n" 106 " stbs %1,0(%2)\n" 107 " mtsm %0\n" 108 : "=&r" (flags) : "r" (val), "r" (addr) ); 109} 110 111extern __inline__ void __raw_writew(unsigned short val, unsigned long addr) 112{ 113 long flags; 114 __asm__ __volatile__( 115 " rsm 2,%0\n" 116 " sths %1,0(%2)\n" 117 " mtsm %0\n" 118 : "=&r" (flags) : "r" (val), "r" (addr) ); 119} 120 121extern __inline__ void __raw_writel(unsigned int val, unsigned long addr) 122{ 123 __asm__ __volatile__( 124 " stwas %0,0(%1)\n" 125 : : "r" (val), "r" (addr) ); 126} 127 128extern __inline__ void __raw_writeq(unsigned long long val, unsigned long addr) 129{ 130#ifdef __LP64__ 131 __asm__ __volatile__( 132 " stda %0,0(%1)\n" 133 : : "r" (val), "r" (addr) ); 134#else 135 /* two writes may have side effects.. */ 136 __raw_writel(val >> 32, addr); 137 __raw_writel(val, addr+4); 138#endif 139} 140 141#if USE_HPPA_IOREMAP 142#define readb(addr) (*(volatile unsigned char *) (addr)) 143#define readw(addr) (*(volatile unsigned short *) (addr)) 144#define readl(addr) (*(volatile unsigned int *) (addr)) 145#define readq(addr) (*(volatile u64 *) (addr)) 146#define writeb(b,addr) (*(volatile unsigned char *) (addr) = (b)) 147#define writew(b,addr) (*(volatile unsigned short *) (addr) = (b)) 148#define writel(b,addr) (*(volatile unsigned int *) (addr) = (b)) 149#define writeq(b,addr) (*(volatile u64 *) (addr) = (b)) 150#else /* !USE_HPPA_IOREMAP */ 151#define readb(addr) __raw_readb((unsigned long)(addr)) 152#define readw(addr) le16_to_cpu(__raw_readw((unsigned long)(addr))) 153#define readl(addr) le32_to_cpu(__raw_readl((unsigned long)(addr))) 154#define readq(addr) le64_to_cpu(__raw_readq((unsigned long)(addr))) 155#define writeb(b,addr) __raw_writeb(b,(unsigned long)(addr)) 156#define writew(b,addr) __raw_writew(cpu_to_le16(b),(unsigned long)(addr)) 157#define writel(b,addr) __raw_writel(cpu_to_le32(b),(unsigned long)(addr)) 158#define writeq(b,addr) __raw_writeq(cpu_to_le64(b),(unsigned long)(addr)) 159#endif /* !USE_HPPA_IOREMAP */ 160 161extern void memcpy_fromio(void *dest, unsigned long src, int count); 162extern void memcpy_toio(unsigned long dest, const void *src, int count); 163extern void memset_io(unsigned long dest, char fill, int count); 164 165/* Support old drivers which don't ioremap. 166 * NB this interface is scheduled to disappear in 2.5 167 */ 168 169#define EISA_BASE 0xfffffffffc000000UL 170#define isa_readb(a) readb(EISA_BASE | (a)) 171#define isa_readw(a) readw(EISA_BASE | (a)) 172#define isa_readl(a) readl(EISA_BASE | (a)) 173#define isa_writeb(b,a) writeb((b), EISA_BASE | (a)) 174#define isa_writew(b,a) writew((b), EISA_BASE | (a)) 175#define isa_writel(b,a) writel((b), EISA_BASE | (a)) 176#define isa_memset_io(a,b,c) memset_io(EISA_BASE | (a), (b), (c)) 177#define isa_memcpy_fromio(a,b,c) memcpy_fromio((a), EISA_BASE | (b), (c)) 178#define isa_memcpy_toio(a,b,c) memcpy_toio(EISA_BASE | (a), (b), (c)) 179 180 181#define eth_io_copy_and_sum(skb,src,len,unused) \ 182 memcpy_fromio((skb)->data,(src),(len)) 183#define isa_eth_io_copy_and_sum(skb,src,len,unused) \ 184 isa_memcpy_fromio((skb)->data,(src),(len)) 185 186/* Port-space IO */ 187 188#define inb_p inb 189#define inw_p inw 190#define inl_p inl 191#define outb_p outb 192#define outw_p outw 193#define outl_p outl 194 195extern unsigned char eisa_in8(unsigned short port); 196extern unsigned short eisa_in16(unsigned short port); 197extern unsigned int eisa_in32(unsigned short port); 198extern void eisa_out8(unsigned char data, unsigned short port); 199extern void eisa_out16(unsigned short data, unsigned short port); 200extern void eisa_out32(unsigned int data, unsigned short port); 201 202#if defined(CONFIG_PCI) 203extern unsigned char inb(int addr); 204extern unsigned short inw(int addr); 205extern unsigned int inl(int addr); 206 207extern void outb(unsigned char b, int addr); 208extern void outw(unsigned short b, int addr); 209extern void outl(unsigned int b, int addr); 210#elif defined(CONFIG_EISA) 211#define inb eisa_in8 212#define inw eisa_in16 213#define inl eisa_in32 214#define outb eisa_out8 215#define outw eisa_out16 216#define outl eisa_out32 217#else 218static inline char inb(unsigned long addr) 219{ 220 BUG(); 221 return -1; 222} 223 224static inline short inw(unsigned long addr) 225{ 226 BUG(); 227 return -1; 228} 229 230static inline int inl(unsigned long addr) 231{ 232 BUG(); 233 return -1; 234} 235 236#define outb(x, y) BUG() 237#define outw(x, y) BUG() 238#define outl(x, y) BUG() 239#endif 240 241/* 242 * String versions of in/out ops: 243 */ 244extern void insb (unsigned long port, void *dst, unsigned long count); 245extern void insw (unsigned long port, void *dst, unsigned long count); 246extern void insl (unsigned long port, void *dst, unsigned long count); 247extern void outsb (unsigned long port, const void *src, unsigned long count); 248extern void outsw (unsigned long port, const void *src, unsigned long count); 249extern void outsl (unsigned long port, const void *src, unsigned long count); 250 251 252/* IO Port space is : BBiiii where BB is HBA number. */ 253#define IO_SPACE_LIMIT 0x00ffffff 254 255 256#define dma_cache_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while(0) 257#define dma_cache_wback(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0) 258#define dma_cache_wback_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0) 259 260#endif 261