1 #ifndef __ALPHA_JENSEN_H
2 #define __ALPHA_JENSEN_H
4 #include <asm/compiler.h>
7 * Defines for the AlphaPC EISA IO and memory address space.
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.
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
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.
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).
31 * EISA Interrupt Acknowledge address
33 #define EISA_INTA (IDENT_ADDR + 0x100000000UL)
38 #define EISA_FEPROM0 (IDENT_ADDR + 0x180000000UL)
39 #define EISA_FEPROM1 (IDENT_ADDR + 0x1A0000000UL)
42 * VL82C106 base address
44 #define EISA_VL82C106 (IDENT_ADDR + 0x1C0000000UL)
47 * EISA "Host Address Extension" address (bits 25-31 of the EISA address)
49 #define EISA_HAE (IDENT_ADDR + 0x1D0000000UL)
52 * "SYSCTL" register address
54 #define EISA_SYSCTL (IDENT_ADDR + 0x1E0000000UL)
57 * "spare" register address
59 #define EISA_SPARE (IDENT_ADDR + 0x1F0000000UL)
62 * EISA memory address offset
64 #define EISA_MEM (IDENT_ADDR + 0x200000000UL)
67 * EISA IO address offset
69 #define EISA_IO (IDENT_ADDR + 0x300000000UL)
74 #ifndef __EXTERN_INLINE
75 #define __EXTERN_INLINE extern inline
76 #define __IO_EXTERN_INLINE
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).
85 * HAE isn't needed for the local IO operations, though.
88 #define JENSEN_HAE_ADDRESS EISA_HAE
89 #define JENSEN_HAE_MASK 0x1ffffff
91 __EXTERN_INLINE void jensen_set_hae(unsigned long addr)
93 /* hae on the Jensen is bits 31:25 shifted right */
95 if (addr != alpha_mv.hae_cache)
99 #define vuip volatile unsigned int *
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..
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.
113 static inline unsigned int jensen_local_inb(unsigned long addr)
115 return 0xff & *(vuip)((addr << 9) + EISA_VL82C106);
118 static inline void jensen_local_outb(u8 b, unsigned long addr)
120 *(vuip)((addr << 9) + EISA_VL82C106) = b;
124 static inline unsigned int jensen_bus_inb(unsigned long addr)
129 result = *(volatile int *)((addr << 7) + EISA_IO + 0x00);
130 return __kernel_extbl(result, addr & 3);
133 static inline void jensen_bus_outb(u8 b, unsigned long addr)
136 *(vuip)((addr << 7) + EISA_IO + 0x00) = b * 0x01010101;
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.
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))
153 __EXTERN_INLINE u8 jensen_inb(unsigned long addr)
155 if (jensen_is_local(addr))
156 return jensen_local_inb(addr);
158 return jensen_bus_inb(addr);
161 __EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr)
163 if (jensen_is_local(addr))
164 jensen_local_outb(b, addr);
166 jensen_bus_outb(b, addr);
169 __EXTERN_INLINE u16 jensen_inw(unsigned long addr)
174 result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20);
175 result >>= (addr & 3) * 8;
176 return 0xffffUL & result;
179 __EXTERN_INLINE u32 jensen_inl(unsigned long addr)
182 return *(vuip) ((addr << 7) + EISA_IO + 0x60);
185 __EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr)
188 *(vuip) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001;
192 __EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr)
195 *(vuip) ((addr << 7) + EISA_IO + 0x60) = b;
203 __EXTERN_INLINE u8 jensen_readb(const volatile void __iomem *xaddr)
205 unsigned long addr = (unsigned long) xaddr;
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;
215 __EXTERN_INLINE u16 jensen_readw(const volatile void __iomem *xaddr)
217 unsigned long addr = (unsigned long) xaddr;
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;
227 __EXTERN_INLINE u32 jensen_readl(const volatile void __iomem *xaddr)
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);
235 __EXTERN_INLINE u64 jensen_readq(const volatile void __iomem *xaddr)
237 unsigned long addr = (unsigned long) xaddr;
238 unsigned long r0, r1;
240 jensen_set_hae(addr);
241 addr &= JENSEN_HAE_MASK;
242 addr = (addr << 7) + EISA_MEM + 0x60;
244 r1 = *(vuip) (addr + (4 << 7));
245 return r1 << 32 | r0;
248 __EXTERN_INLINE void jensen_writeb(u8 b, volatile void __iomem *xaddr)
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;
256 __EXTERN_INLINE void jensen_writew(u16 b, volatile void __iomem *xaddr)
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;
264 __EXTERN_INLINE void jensen_writel(u32 b, volatile void __iomem *xaddr)
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;
272 __EXTERN_INLINE void jensen_writeq(u64 b, volatile void __iomem *xaddr)
274 unsigned long addr = (unsigned long) xaddr;
275 jensen_set_hae(addr);
276 addr &= JENSEN_HAE_MASK;
277 addr = (addr << 7) + EISA_MEM + 0x60;
279 *(vuip) (addr + (4 << 7)) = b >> 32;
282 __EXTERN_INLINE void __iomem *jensen_ioportmap(unsigned long addr)
284 return (void __iomem *)addr;
287 __EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr,
290 return (void __iomem *)(addr + 0x100000000ul);
293 __EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr)
295 return (long)addr >= 0;
298 __EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr)
300 return (unsigned long)addr >= 0x100000000ul;
303 /* New-style ioread interface. All the routines are so ugly for Jensen
304 that it doesn't make sense to merge them. */
306 #define IOPORT(OS, NS) \
307 __EXTERN_INLINE unsigned int jensen_ioread##NS(void __iomem *xaddr) \
309 if (jensen_is_mmio(xaddr)) \
310 return jensen_read##OS(xaddr - 0x100000000ul); \
312 return jensen_in##OS((unsigned long)xaddr); \
314 __EXTERN_INLINE void jensen_iowrite##NS(u##NS b, void __iomem *xaddr) \
316 if (jensen_is_mmio(xaddr)) \
317 jensen_write##OS(b, xaddr - 0x100000000ul); \
319 jensen_out##OS(b, (unsigned long)xaddr); \
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>
339 #ifdef __IO_EXTERN_INLINE
340 #undef __EXTERN_INLINE
341 #undef __IO_EXTERN_INLINE
344 #endif /* __KERNEL__ */
346 #endif /* __ALPHA_JENSEN_H */