jensen.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:8k
- #ifndef __ALPHA_JENSEN_H
- #define __ALPHA_JENSEN_H
- #include <asm/compiler.h>
- /*
- * Defines for the AlphaPC EISA IO and memory address space.
- */
- /* The Jensen is strange */
- #define AUX_IRQ (9)
- /*
- * NOTE! The memory operations do not set any memory barriers, as it's
- * not needed for cases like a frame buffer that is essentially memory-like.
- * You need to do them by hand if the operations depend on ordering.
- *
- * Similarly, the port IO operations do a "mb" only after a write operation:
- * if an mb is needed before (as in the case of doing memory mapped IO
- * first, and then a port IO operation to the same device), it needs to be
- * done by hand.
- *
- * After the above has bitten me 100 times, I'll give up and just do the
- * mb all the time, but right now I'm hoping this will work out. Avoiding
- * mb's may potentially be a noticeable speed improvement, but I can't
- * honestly say I've tested it.
- *
- * Handling interrupts that need to do mb's to synchronize to non-interrupts
- * is another fun race area. Don't do it (because if you do, I'll have to
- * do *everything* with interrupts disabled, ugh).
- */
- /*
- * EISA Interrupt Acknowledge address
- */
- #define EISA_INTA (IDENT_ADDR + 0x100000000UL)
- /*
- * FEPROM addresses
- */
- #define EISA_FEPROM0 (IDENT_ADDR + 0x180000000UL)
- #define EISA_FEPROM1 (IDENT_ADDR + 0x1A0000000UL)
- /*
- * VL82C106 base address
- */
- #define EISA_VL82C106 (IDENT_ADDR + 0x1C0000000UL)
- /*
- * EISA "Host Address Extension" address (bits 25-31 of the EISA address)
- */
- #define EISA_HAE (IDENT_ADDR + 0x1D0000000UL)
- /*
- * "SYSCTL" register address
- */
- #define EISA_SYSCTL (IDENT_ADDR + 0x1E0000000UL)
- /*
- * "spare" register address
- */
- #define EISA_SPARE (IDENT_ADDR + 0x1F0000000UL)
- /*
- * EISA memory address offset
- */
- #define EISA_MEM (IDENT_ADDR + 0x200000000UL)
- /*
- * EISA IO address offset
- */
- #define EISA_IO (IDENT_ADDR + 0x300000000UL)
- #ifdef __KERNEL__
- #ifndef __EXTERN_INLINE
- #define __EXTERN_INLINE extern inline
- #define __IO_EXTERN_INLINE
- #endif
- /*
- * Handle the "host address register". This needs to be set
- * to the high 7 bits of the EISA address. This is also needed
- * for EISA IO addresses, which are only 16 bits wide (the
- * hae needs to be set to 0).
- *
- * HAE isn't needed for the local IO operations, though.
- */
- #define JENSEN_HAE_ADDRESS EISA_HAE
- #define JENSEN_HAE_MASK 0x1ffffff
- __EXTERN_INLINE void jensen_set_hae(unsigned long addr)
- {
- /* hae on the Jensen is bits 31:25 shifted right */
- addr >>= 25;
- if (addr != alpha_mv.hae_cache)
- set_hae(addr);
- }
- #define vuip volatile unsigned int *
- /*
- * IO functions
- *
- * The "local" functions are those that don't go out to the EISA bus,
- * but instead act on the VL82C106 chip directly.. This is mainly the
- * keyboard, RTC, printer and first two serial lines..
- *
- * The local stuff makes for some complications, but it seems to be
- * gone in the PCI version. I hope I can get DEC suckered^H^H^H^H^H^H^H^H
- * convinced that I need one of the newer machines.
- */
- static inline unsigned int jensen_local_inb(unsigned long addr)
- {
- return 0xff & *(vuip)((addr << 9) + EISA_VL82C106);
- }
- static inline void jensen_local_outb(u8 b, unsigned long addr)
- {
- *(vuip)((addr << 9) + EISA_VL82C106) = b;
- mb();
- }
- static inline unsigned int jensen_bus_inb(unsigned long addr)
- {
- long result;
- jensen_set_hae(0);
- result = *(volatile int *)((addr << 7) + EISA_IO + 0x00);
- return __kernel_extbl(result, addr & 3);
- }
- static inline void jensen_bus_outb(u8 b, unsigned long addr)
- {
- jensen_set_hae(0);
- *(vuip)((addr << 7) + EISA_IO + 0x00) = b * 0x01010101;
- mb();
- }
- /*
- * It seems gcc is not very good at optimizing away logical
- * operations that result in operations across inline functions.
- * Which is why this is a macro.
- */
- #define jensen_is_local(addr) (
- /* keyboard */ (addr == 0x60 || addr == 0x64) ||
- /* RTC */ (addr == 0x170 || addr == 0x171) ||
- /* mb COM2 */ (addr >= 0x2f8 && addr <= 0x2ff) ||
- /* mb LPT1 */ (addr >= 0x3bc && addr <= 0x3be) ||
- /* mb COM2 */ (addr >= 0x3f8 && addr <= 0x3ff))
- __EXTERN_INLINE u8 jensen_inb(unsigned long addr)
- {
- if (jensen_is_local(addr))
- return jensen_local_inb(addr);
- else
- return jensen_bus_inb(addr);
- }
- __EXTERN_INLINE void jensen_outb(u8 b, unsigned long addr)
- {
- if (jensen_is_local(addr))
- jensen_local_outb(b, addr);
- else
- jensen_bus_outb(b, addr);
- }
- __EXTERN_INLINE u16 jensen_inw(unsigned long addr)
- {
- long result;
- jensen_set_hae(0);
- result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20);
- result >>= (addr & 3) * 8;
- return 0xffffUL & result;
- }
- __EXTERN_INLINE u32 jensen_inl(unsigned long addr)
- {
- jensen_set_hae(0);
- return *(vuip) ((addr << 7) + EISA_IO + 0x60);
- }
- __EXTERN_INLINE void jensen_outw(u16 b, unsigned long addr)
- {
- jensen_set_hae(0);
- *(vuip) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001;
- mb();
- }
- __EXTERN_INLINE void jensen_outl(u32 b, unsigned long addr)
- {
- jensen_set_hae(0);
- *(vuip) ((addr << 7) + EISA_IO + 0x60) = b;
- mb();
- }
- /*
- * Memory functions.
- */
- __EXTERN_INLINE u8 jensen_readb(unsigned long addr)
- {
- long result;
- jensen_set_hae(addr);
- addr &= JENSEN_HAE_MASK;
- result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00);
- result >>= (addr & 3) * 8;
- return 0xffUL & result;
- }
- __EXTERN_INLINE u16 jensen_readw(unsigned long addr)
- {
- long result;
- jensen_set_hae(addr);
- addr &= JENSEN_HAE_MASK;
- result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20);
- result >>= (addr & 3) * 8;
- return 0xffffUL & result;
- }
- __EXTERN_INLINE u32 jensen_readl(unsigned long addr)
- {
- jensen_set_hae(addr);
- addr &= JENSEN_HAE_MASK;
- return *(vuip) ((addr << 7) + EISA_MEM + 0x60);
- }
- __EXTERN_INLINE u64 jensen_readq(unsigned long addr)
- {
- unsigned long r0, r1;
- jensen_set_hae(addr);
- addr &= JENSEN_HAE_MASK;
- addr = (addr << 7) + EISA_MEM + 0x60;
- r0 = *(vuip) (addr);
- r1 = *(vuip) (addr + (4 << 7));
- return r1 << 32 | r0;
- }
- __EXTERN_INLINE void jensen_writeb(u8 b, unsigned long addr)
- {
- jensen_set_hae(addr);
- addr &= JENSEN_HAE_MASK;
- *(vuip) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101;
- }
- __EXTERN_INLINE void jensen_writew(u16 b, unsigned long addr)
- {
- jensen_set_hae(addr);
- addr &= JENSEN_HAE_MASK;
- *(vuip) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001;
- }
- __EXTERN_INLINE void jensen_writel(u32 b, unsigned long addr)
- {
- jensen_set_hae(addr);
- addr &= JENSEN_HAE_MASK;
- *(vuip) ((addr << 7) + EISA_MEM + 0x60) = b;
- }
- __EXTERN_INLINE void jensen_writeq(u64 b, unsigned long addr)
- {
- jensen_set_hae(addr);
- addr &= JENSEN_HAE_MASK;
- addr = (addr << 7) + EISA_MEM + 0x60;
- *(vuip) (addr) = b;
- *(vuip) (addr + (4 << 7)) = b >> 32;
- }
- __EXTERN_INLINE unsigned long jensen_ioremap(unsigned long addr,
- unsigned long size)
- {
- return addr;
- }
- __EXTERN_INLINE void jensen_iounmap(unsigned long addr)
- {
- return;
- }
- __EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr)
- {
- return (long)addr >= 0;
- }
- #undef vuip
- #ifdef __WANT_IO_DEF
- #define __inb jensen_inb
- #define __inw jensen_inw
- #define __inl jensen_inl
- #define __outb jensen_outb
- #define __outw jensen_outw
- #define __outl jensen_outl
- #define __readb jensen_readb
- #define __readw jensen_readw
- #define __writeb jensen_writeb
- #define __writew jensen_writew
- #define __readl jensen_readl
- #define __readq jensen_readq
- #define __writel jensen_writel
- #define __writeq jensen_writeq
- #define __ioremap jensen_ioremap
- #define __iounmap(a) jensen_iounmap((unsigned long)a)
- #define __is_ioaddr jensen_is_ioaddr
- /*
- * The above have so much overhead that it probably doesn't make
- * sense to have them inlined (better icache behaviour).
- */
- #define inb(port)
- (__builtin_constant_p((port))?__inb(port):_inb(port))
- #define outb(x, port)
- (__builtin_constant_p((port))?__outb((x),(port)):_outb((x),(port)))
- #endif /* __WANT_IO_DEF */
- #ifdef __IO_EXTERN_INLINE
- #undef __EXTERN_INLINE
- #undef __IO_EXTERN_INLINE
- #endif
- #endif /* __KERNEL__ */
- #endif /* __ALPHA_JENSEN_H */