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- #ifndef __ALPHA_JENSEN_H
- #define __ALPHA_JENSEN_H
-
- /*
- * Defines for the AlphaPC EISA IO and memory address space.
- */
-
- /*
- * NOTE! Currently it never uses the HAE register, so these work only
- * for the low 25 bits of EISA addressing. That covers all of the IO
- * address space (16 bits), and most of the "normal" EISA memory space.
- * I'll fix it eventually, but I'll need to come up with a clean way
- * to handle races with interrupt services wanting to change HAE...
- */
-
- /*
- * NOTE 2! 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).
- */
-
- /*
- * Virtual -> physical identity mapping starts at this offset
- */
- #define IDENT_ADDR (0xfffffc0000000000UL)
-
- /*
- * 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)
-
- /*
- * 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 inline unsigned int __inb(unsigned long addr)
- {
- long result = *(volatile int *) ((addr << 7) + EISA_IO + 0x00);
- result >>= (addr & 3) * 8;
- return 0xffUL & result;
- }
-
- extern inline void __outb(unsigned char b, unsigned long addr)
- {
- *(volatile unsigned int *) ((addr << 7) + EISA_IO + 0x00) = b * 0x01010101;
- mb();
- }
-
- /*
- * This is a stupid one: I'll make it a bitmap soon, promise..
- *
- * On the other hand: this allows gcc to optimize. Hmm. I'll
- * have to use the __constant_p() stuff here.
- */
- extern inline int __is_local(unsigned long addr)
- {
- /* keyboard */
- if (addr == 0x60 || addr == 0x64)
- return 1;
-
- /* RTC */
- if (addr == 0x170 || addr == 0x171)
- return 1;
-
- /* motherboard COM2 */
- if (addr >= 0x2f8 && addr <= 0x2ff)
- return 1;
-
- /* motherboard LPT1 */
- if (addr >= 0x3bc && addr <= 0x3be)
- return 1;
-
- /* motherboard COM2 */
- if (addr >= 0x3f8 && addr <= 0x3ff)
- return 1;
-
- return 0;
- }
-
- extern inline unsigned int inb(unsigned long addr)
- {
- if (__is_local(addr))
- return __local_inb(addr);
- return __inb(addr);
- }
-
- extern inline void outb(unsigned char b, unsigned long addr)
- {
- if (__is_local(addr))
- __local_outb(b, addr);
- else
- __outb(b, addr);
- }
-
- extern inline unsigned int inw(unsigned long addr)
- {
- long result = *(volatile int *) ((addr << 7) + EISA_IO + 0x20);
- result >>= (addr & 3) * 8;
- return 0xffffUL & result;
- }
-
- extern inline unsigned int inl(unsigned long addr)
- {
- return *(volatile unsigned int *) ((addr << 7) + EISA_IO + 0x60);
- }
-
- extern inline void outw(unsigned short b, unsigned long addr)
- {
- *(volatile unsigned int *) ((addr << 7) + EISA_IO + 0x20) = b * 0x00010001;
- mb();
- }
-
- extern inline void outl(unsigned int b, unsigned long addr)
- {
- *(volatile unsigned int *) ((addr << 7) + EISA_IO + 0x60) = b;
- mb();
- }
-
- /*
- * Memory functions
- */
- extern inline unsigned long readb(unsigned long addr)
- {
- long 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 = *(volatile int *) ((addr << 7) + EISA_MEM + 0x20);
- result >>= (addr & 3) * 8;
- return 0xffffUL & result;
- }
-
- extern inline unsigned long readl(unsigned long addr)
- {
- return *(volatile unsigned int *) ((addr << 7) + EISA_MEM + 0x60);
- }
-
- extern inline void writeb(unsigned short b, unsigned long addr)
- {
- *(volatile unsigned int *) ((addr << 7) + EISA_MEM + 0x00) = b * 0x01010101;
- }
-
- extern inline void writew(unsigned short b, unsigned long addr)
- {
- *(volatile unsigned int *) ((addr << 7) + EISA_MEM + 0x20) = b * 0x00010001;
- }
-
- extern inline void writel(unsigned int b, unsigned long addr)
- {
- *(volatile unsigned int *) ((addr << 7) + EISA_MEM + 0x60) = b;
- }
-
- #define inb_p inb
- #define outb_p outb
-
- /*
- * 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
-