#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
