arch/alpha/include/asm/jensen.h

   1 #ifndef __ALPHA_JENSEN_H
   2 #define __ALPHA_JENSEN_H
   3
   4 #include <asm/compiler.h>
   5
   6 /*
   7  * Defines for the AlphaPC EISA IO and memory address space.
   8  */
   9
  10 /*
  11  * NOTE! The memory operations do not set any memory barriers, as it's
  12  * not needed for cases like a frame buffer that is essentially memory-like.
  13  * You need to do them by hand if the operations depend on ordering.
  14  *
  15  * Similarly, the port IO operations do a "mb" only after a write operation:
  16  * if an mb is needed before (as in the case of doing memory mapped IO
  17  * first, and then a port IO operation to the same device), it needs to be
  18  * done by hand.
  19  *
  20  * After the above has bitten me 100 times, I'll give up and just do the
  21  * mb all the time, but right now I'm hoping this will work out.  Avoiding
  22  * mb's may potentially be a noticeable speed improvement, but I can't
  23  * honestly say I've tested it.
  24  *
  25  * Handling interrupts that need to do mb's to synchronize to non-interrupts
  26  * is another fun race area.  Don't do it (because if you do, I'll have to
  27  * do *everything* with interrupts disabled, ugh).
  28  */
  29
  30 /*
  31  * EISA Interrupt Acknowledge address
  32  */
  33 #define EISA_INTA               (IDENT_ADDR + 0x100000000UL)
  34
  35 /*
  36  * FEPROM addresses
  37  */
  38 #define EISA_FEPROM0            (IDENT_ADDR + 0x180000000UL)
  39 #define EISA_FEPROM1            (IDENT_ADDR + 0x1A0000000UL)
  40
  41 /*
  42  * VL82C106 base address
  43  */
  44 #define EISA_VL82C106           (IDENT_ADDR + 0x1C0000000UL)
  45
  46 /*
  47  * EISA "Host Address Extension" address (bits 25-31 of the EISA address)
  48  */
  49 #define EISA_HAE                (IDENT_ADDR + 0x1D0000000UL)
  50
  51 /*
  52  * "SYSCTL" register address
  53  */
  54 #define EISA_SYSCTL             (IDENT_ADDR + 0x1E0000000UL)
  55
  56 /*
  57  * "spare" register address
  58  */
  59 #define EISA_SPARE              (IDENT_ADDR + 0x1F0000000UL)
  60
  61 /*
  62  * EISA memory address offset
  63  */
  64 #define EISA_MEM                (IDENT_ADDR + 0x200000000UL)
  65
  66 /*
  67  * EISA IO address offset
  68  */
  69 #define EISA_IO                 (IDENT_ADDR + 0x300000000UL)
  70
  71
  72 #ifdef __KERNEL__
  73
  74 #ifndef __EXTERN_INLINE
  75 #define __EXTERN_INLINE extern inline
  76 #define __IO_EXTERN_INLINE
  77 #endif
  78
  79 /*
  80  * Handle the "host address register". This needs to be set
  81  * to the high 7 bits of the EISA address.  This is also needed
  82  * for EISA IO addresses, which are only 16 bits wide (the
  83  * hae needs to be set to 0).
  84  *
  85  * HAE isn't needed for the local IO operations, though.
  86  */
  87
  88 #define JENSEN_HAE_ADDRESS      EISA_HAE
  89 #define JENSEN_HAE_MASK         0x1ffffff
  90
  91 __EXTERN_INLINE void jensen_set_hae(unsigned long addr)
  92 {
  93         /* hae on the Jensen is bits 31:25 shifted right */
  94         addr >>= 25;
  95         if (addr != alpha_mv.hae_cache)
  96                 set_hae(addr);
  97 }
  98
  99 #define vuip    volatile unsigned int *
 100
 101 /*
 102  * IO functions
 103  *
 104  * The "local" functions are those that don't go out to the EISA bus,
 105  * but instead act on the VL82C106 chip directly.. This is mainly the
 106  * keyboard, RTC,  printer and first two serial lines..
 107  *
 108  * The local stuff makes for some complications, but it seems to be
 109  * gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H
 110  * convinced that I need one of the newer machines.
 111  */
 112
 113 static inline unsigned int jensen_local_inb(unsigned long addr)
 114 {
 115         return 0xff & *(vuip)((addr << 9) + EISA_VL82C106);
 116 }
 117
 118 static inline void jensen_local_outb(u8 b, unsigned long addr)
 119 {
 120         *(vuip)((addr << 9) + EISA_VL82C106) = b;
 121         mb();
 122 }
 123
 124 static inline unsigned int jensen_bus_inb(unsigned long addr)
 125 {
 126         long result;
 127
 128         jensen_set_hae(0);
 129         result = *(volatile int *)((addr << 7) + EISA_IO + 0x00);
 130         return __kernel_extbl(result, addr & 3);
 131 }
 132
 133 static inline void jensen_bus_outb(u8 b, unsigned long addr)
 134 {
 135         jensen_set_hae(0);
 136         *(vuip)((addr << 7) + EISA_IO + 0x00) = b * 0x01010101;
 137         mb();
 138 }
 139
 140 /*
 141  * It seems gcc is not very good at optimizing away logical
 142  * operations that result in operations across inline functions.
 143  * Which is why this is a macro.
 144  */
 145
 146 #define jensen_is_local(addr) ( \
 147 /* keyboard */  (addr == 0x60 || addr == 0x64) || \
 148 /* RTC */       (addr == 0x170 || addr == 0x171) || \
 149 /* mb COM2 */   (addr >= 0x2f8 && addr <= 0x2ff) || \
 150 /* mb LPT1 */   (addr >= 0x3bc && addr <= 0x3be) || \
 151 /* mb COM2 */   (addr >= 0x3f8 && addr <= 0x3ff))
 152
 153 __EXTERN_INLINE u8 jensen_inb(unsigned long addr)
 154 {
 155         if (jensen_is_local(addr))
 156                 return jensen_local_inb(addr);
 157         else
 158                 return jensen_bus_inb(addr);
 159 }
 160
 161 __EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr)
 162 {
 163         if (jensen_is_local(addr))
 164                 jensen_local_outb(b, addr);
 165         else
 166                 jensen_bus_outb(b, addr);
 167 }
 168
 169 __EXTERN_INLINE u16 jensen_inw(unsigned long addr)
 170 {
 171         long result;
 172
 173         jensen_set_hae(0);
 174         result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20);
 175         result >>= (addr & 3) * 8;
 176         return 0xffffUL & result;
 177 }
 178
 179 __EXTERN_INLINE u32 jensen_inl(unsigned long addr)
 180 {
 181         jensen_set_hae(0);
 182         return *(vuip) ((addr << 7) + EISA_IO + 0x60);
 183 }
 184
 185 __EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr)
 186 {
 187         jensen_set_hae(0);
 188         *(vuip) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001;
 189         mb();
 190 }
 191
 192 __EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr)
 193 {
 194         jensen_set_hae(0);
 195         *(vuip) ((addr << 7) + EISA_IO + 0x60) = b;
 196         mb();
 197 }
 198
 199 /*
 200  * Memory functions.
 201  */
 202
 203 __EXTERN_INLINE u8 jensen_readb(const volatile void __iomem *xaddr)
 204 {
 205         unsigned long addr = (unsigned long) xaddr;
 206         long result;
 207
 208         jensen_set_hae(addr);
 209         addr &= JENSEN_HAE_MASK;
 210         result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00);
 211         result >>= (addr & 3) * 8;
 212         return 0xffUL & result;
 213 }
 214
 215 __EXTERN_INLINE u16 jensen_readw(const volatile void __iomem *xaddr)
 216 {
 217         unsigned long addr = (unsigned long) xaddr;
 218         long result;
 219
 220         jensen_set_hae(addr);
 221         addr &= JENSEN_HAE_MASK;
 222         result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20);
 223         result >>= (addr & 3) * 8;
 224         return 0xffffUL & result;
 225 }
 226
 227 __EXTERN_INLINE u32 jensen_readl(const volatile void __iomem *xaddr)
 228 {
 229         unsigned long addr = (unsigned long) xaddr;
 230         jensen_set_hae(addr);
 231         addr &= JENSEN_HAE_MASK;
 232         return *(vuip) ((addr << 7) + EISA_MEM + 0x60);
 233 }
 234
 235 __EXTERN_INLINE u64 jensen_readq(const volatile void __iomem *xaddr)
 236 {
 237         unsigned long addr = (unsigned long) xaddr;
 238         unsigned long r0, r1;
 239
 240         jensen_set_hae(addr);
 241         addr &= JENSEN_HAE_MASK;
 242         addr = (addr << 7) + EISA_MEM + 0x60;
 243         r0 = *(vuip) (addr);
 244         r1 = *(vuip) (addr + (4 << 7));
 245         return r1 << 32 | r0;
 246 }
 247
 248 __EXTERN_INLINE void jensen_writeb(u8 b, volatile void __iomem *xaddr)
 249 {
 250         unsigned long addr = (unsigned long) xaddr;
 251         jensen_set_hae(addr);
 252         addr &= JENSEN_HAE_MASK;
 253         *(vuip) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101;
 254 }
 255
 256 __EXTERN_INLINE void jensen_writew(u16 b, volatile void __iomem *xaddr)
 257 {
 258         unsigned long addr = (unsigned long) xaddr;
 259         jensen_set_hae(addr);
 260         addr &= JENSEN_HAE_MASK;
 261         *(vuip) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001;
 262 }
 263
 264 __EXTERN_INLINE void jensen_writel(u32 b, volatile void __iomem *xaddr)
 265 {
 266         unsigned long addr = (unsigned long) xaddr;
 267         jensen_set_hae(addr);
 268         addr &= JENSEN_HAE_MASK;
 269         *(vuip) ((addr << 7) + EISA_MEM + 0x60) = b;
 270 }
 271
 272 __EXTERN_INLINE void jensen_writeq(u64 b, volatile void __iomem *xaddr)
 273 {
 274         unsigned long addr = (unsigned long) xaddr;
 275         jensen_set_hae(addr);
 276         addr &= JENSEN_HAE_MASK;
 277         addr = (addr << 7) + EISA_MEM + 0x60;
 278         *(vuip) (addr) = b;
 279         *(vuip) (addr + (4 << 7)) = b >> 32;
 280 }
 281
 282 __EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr)
 283 {
 284         return (void __iomem *)addr;
 285 }
 286
 287 __EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr,
 288                                              unsigned long size)
 289 {
 290         return (void __iomem *)(addr + 0x100000000ul);
 291 }
 292
 293 __EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr)
 294 {
 295         return (long)addr >= 0;
 296 }
 297
 298 __EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr)
 299 {
 300         return (unsigned long)addr >= 0x100000000ul;
 301 }
 302
 303 /* New-style ioread interface.  All the routines are so ugly for Jensen
 304    that it doesn't make sense to merge them.  */
 305
 306 #define IOPORT(OS, NS)                                                  \
 307 __EXTERN_INLINE unsigned int jensen_ioread##NS(void __iomem *xaddr)     \
 308 {                                                                       \
 309         if (jensen_is_mmio(xaddr))                                      \
 310                 return jensen_read##OS(xaddr - 0x100000000ul);          \
 311         else                                                            \
 312                 return jensen_in##OS((unsigned long)xaddr);             \
 313 }                                                                       \
 314 __EXTERN_INLINE void jensen_iowrite##NS(u##NS b, void __iomem *xaddr)   \
 315 {                                                                       \
 316         if (jensen_is_mmio(xaddr))                                      \
 317                 jensen_write##OS(b, xaddr - 0x100000000ul);             \
 318         else                                                            \
 319                 jensen_out##OS(b, (unsigned long)xaddr);                \
 320 }
 321
 322 IOPORT(b, 8)
 323 IOPORT(w, 16)
 324 IOPORT(l, 32)
 325
 326 #undef IOPORT
 327
 328 #undef vuip
 329
 330 #undef __IO_PREFIX
 331 #define __IO_PREFIX             jensen
 332 #define jensen_trivial_rw_bw    0
 333 #define jensen_trivial_rw_lq    0
 334 #define jensen_trivial_io_bw    0
 335 #define jensen_trivial_io_lq    0
 336 #define jensen_trivial_iounmap  1
 337 #include <asm/io_trivial.h>
 338
 339 #ifdef __IO_EXTERN_INLINE
 340 #undef __EXTERN_INLINE
 341 #undef __IO_EXTERN_INLINE
 342 #endif
 343
 344 #endif /* __KERNEL__ */
 345
 346 #endif /* __ALPHA_JENSEN_H */