#ifndef __ALPHA_JENSEN_H
#define __ALPHA_JENSEN_H

#include <asm/compiler.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)


#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(const volatile void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
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(const volatile void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
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(const volatile void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
jensen_set_hae(addr);
addr &= JENSEN_HAE_MASK;
return *(vuip) ((addr << 7) + EISA_MEM + 0x60);
}

__EXTERN_INLINE u64 jensen_readq(const volatile void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
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, volatile void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
jensen_set_hae(addr);
addr &= JENSEN_HAE_MASK;
*(vuip) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101;
}

__EXTERN_INLINE void jensen_writew(u16 b, volatile void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
jensen_set_hae(addr);
addr &= JENSEN_HAE_MASK;
*(vuip) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001;
}

__EXTERN_INLINE void jensen_writel(u32 b, volatile void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
jensen_set_hae(addr);
addr &= JENSEN_HAE_MASK;
*(vuip) ((addr << 7) + EISA_MEM + 0x60) = b;
}

__EXTERN_INLINE void jensen_writeq(u64 b, volatile void __iomem *xaddr)
{
unsigned long addr = (unsigned long) xaddr;
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 void __iomem *jensen_ioportmap(unsigned long addr)
{
return (void __iomem *)addr;
}

__EXTERN_INLINE void __iomem *jensen_ioremap(unsigned long addr,
unsigned long size)
{
return (void __iomem *)(addr + 0x100000000ul);
}

__EXTERN_INLINE int jensen_is_ioaddr(unsigned long addr)
{
return (long)addr >= 0;
}

__EXTERN_INLINE int jensen_is_mmio(const volatile void __iomem *addr)
{
return (unsigned long)addr >= 0x100000000ul;
}

/* New-style ioread interface. All the routines are so ugly for Jensen
that it doesn't make sense to merge them. */

#define IOPORT(OS, NS) \
__EXTERN_INLINE unsigned int jensen_ioread##NS(void __iomem *xaddr) \
{ \
if (jensen_is_mmio(xaddr)) \
return jensen_read##OS(xaddr - 0x100000000ul); \
else \
return jensen_in##OS((unsigned long)xaddr); \
} \
__EXTERN_INLINE void jensen_iowrite##NS(u##NS b, void __iomem *xaddr) \
{ \
if (jensen_is_mmio(xaddr)) \
jensen_write##OS(b, xaddr - 0x100000000ul); \
else \
jensen_out##OS(b, (unsigned long)xaddr); \
}

IOPORT(b, 8)
IOPORT(w, 16)
IOPORT(l, 32)

#undef IOPORT

#undef vuip

#undef __IO_PREFIX
#define __IO_PREFIX jensen
#define jensen_trivial_rw_bw 0
#define jensen_trivial_rw_lq 0
#define jensen_trivial_io_bw 0
#define jensen_trivial_io_lq 0
#define jensen_trivial_iounmap 1
#include <asm/io_trivial.h>

#ifdef __IO_EXTERN_INLINE
#undef __EXTERN_INLINE
#undef __IO_EXTERN_INLINE
#endif

#endif /* __KERNEL__ */

#endif /* __ALPHA_JENSEN_H */