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#ifndef __ALPHA_JENSEN_H

#define __ALPHA_JENSEN_H

/*

 * Defines for the AlphaPC EISA IO and memory address space.

 */

/*

 * 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)

/*

 * Change virtual addresses to bus addresses and vv.

 *

 * NOTE! On the Jensen, the physical address is the same

 * as the bus address, but this is not necessarily true on

 * other alpha hardware.

 */

#define virt_to_bus virt_to_phys

#define bus_to_virt phys_to_virt

#define HAE_ADDRESS     EISA_HAE

/*

 * 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 __HAE_MASK 0x1ffffff

extern inline void __set_hae(unsigned long addr)

{

        /* hae on the Jensen is bits 31:25 shifted right */

        addr >>= 25;

        if (addr != hae.cache)

                set_hae(addr);

}

/*

 * 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.

 */

extern inline unsigned int __local_inb(unsigned long addr)

{

        long result = *(volatile int *) ((addr << 9) + EISA_VL82C106);

        return 0xffUL & result;

}

extern inline void __local_outb(unsigned char b, unsigned long addr)

{

        *(volatile unsigned int *) ((addr << 9) + EISA_VL82C106) = b;

        mb();

}

extern unsigned int _bus_inb(unsigned long addr);

extern inline unsigned int __bus_inb(unsigned long addr)

{

        long result;

        __set_hae(0);

        result = *(volatile int *) ((addr << 7) + EISA_IO + 0x00);

        result >>= (addr & 3) * 8;

        return 0xffUL & result;

}

extern void _bus_outb(unsigned char b, unsigned long addr);

extern inline void __bus_outb(unsigned char b, unsigned long addr)

{

        __set_hae(0);

        *(volatile unsigned int *) ((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 __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 unsigned int __inb(unsigned long addr)

{

        if (__is_local(addr))

                return __local_inb(addr);

        return _bus_inb(addr);

}

extern inline void __outb(unsigned char b, unsigned long addr)

{

        if (__is_local(addr))

                __local_outb(b, addr);

        else

                _bus_outb(b, addr);

}

extern inline unsigned int __inw(unsigned long addr)

{

        long result;

        __set_hae(0);

        result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20);

        result >>= (addr & 3) * 8;

        return 0xffffUL & result;

}

extern inline unsigned int __inl(unsigned long addr)

{

        __set_hae(0);

        return *(volatile unsigned int *) ((addr << 7) + EISA_IO + 0x60);

}

extern inline void __outw(unsigned short b, unsigned long addr)

{

        __set_hae(0);

        *(volatile unsigned int *) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001;

        mb();

}

extern inline void __outl(unsigned int b, unsigned long addr)

{

        __set_hae(0);

        *(volatile unsigned int *) ((addr << 7) + EISA_IO + 0x60) = b;

        mb();

}

/*

 * Memory functions.

 */

extern inline unsigned long __readb(unsigned long addr)

{

        long result;

        __set_hae(addr);

        addr &= __HAE_MASK;

        result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x00);

        result >>= (addr & 3) * 8;

        return 0xffUL & result;

}

extern inline unsigned long __readw(unsigned long addr)

{

        long result;

        __set_hae(addr);

        addr &= __HAE_MASK;

        result = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20);

        result >>= (addr & 3) * 8;

        return 0xffffUL & result;

}

extern inline unsigned long __readl(unsigned long addr)

{

        __set_hae(addr);

        addr &= __HAE_MASK;

        return *(volatile unsigned int *) ((addr << 7) + EISA_MEM + 0x60);

}

extern inline void __writeb(unsigned short b, unsigned long addr)

{

        __set_hae(addr);

        addr &= __HAE_MASK;

        *(volatile unsigned int *) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101;

}

extern inline void __writew(unsigned short b, unsigned long addr)

{

        __set_hae(addr);

        addr &= __HAE_MASK;

        *(volatile unsigned int *) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001;

}

extern inline void __writel(unsigned int b, unsigned long addr)

{

        __set_hae(addr);

        addr &= __HAE_MASK;

        *(volatile unsigned int *) ((addr << 7) + EISA_MEM + 0x60) = b;

}

/*

 * 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)))

/*

 * The Alpha Jensen hardware for some rather strange reason puts

 * the RTC clock at 0x170 instead of 0x70. Probably due to some

 * misguided idea about using 0x70 for NMI stuff.

 *

 * These defines will override the defaults when doing RTC queries

 */

#define RTC_PORT(x)     (0x170+(x))

#define RTC_ADDR(x)     (x)

#define RTC_ALWAYS_BCD  0

#endif