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- #ifndef __ALPHA_LCA__H
- #define __ALPHA_LCA__H
-
- /*
- * Low Cost Alpha (LCA) definitions (these apply to 21066 and 21068,
- * for example).
- *
- * This file is based on:
- *
- * DECchip 21066 and DECchip 21068 Alpha AXP Microprocessors
- * Hardware Reference Manual; Digital Equipment Corp.; May 1994;
- * Maynard, MA; Order Number: EC-N2681-71.
- */
-
- /*
- * NOTE! Currently, this never uses the HAE register, so it works only
- * for the low 27 bits of the PCI sparse memory address space. Dense
- * memory space doesn't require the HAE, but is restricted to aligned
- * 32 and 64 bit accesses. Special Cycle and Interrupt Acknowledge
- * cycles may also require the use of the HAE. The LCA limits I/O
- * address space to the bottom 24 bits of address space, but this
- * easily covers the 16 bit ISA I/O address space.
- */
-
- /*
- * 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 I/O operations do a "mb" only after a write
- * operation: if an mb is needed before (as in the case of doing
- * memory mapped I/O first, and then a port I/O 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)
-
- /*
- * I/O Controller registers:
- */
- #define LCA_IOC_HAE (IDENT_ADDR + 0x180000000UL)
- #define LCA_IOC_CONF (IDENT_ADDR + 0x180000020UL)
- #define LCA_IOC_STAT0 (IDENT_ADDR + 0x180000040UL)
- #define LCA_IOC_STAT1 (IDENT_ADDR + 0x180000060UL)
- #define LCA_IOC_TBIA (IDENT_ADDR + 0x180000080UL)
- #define LCA_IOC_TB_ENA (IDENT_ADDR + 0x1800000a0UL)
- #define LCA_IOC_SFT_RST (IDENT_ADDR + 0x1800000c0UL)
- #define LCA_IOC_PAR_DIS (IDENT_ADDR + 0x1800000e0UL)
- #define LCA_IOC_W_BASE0 (IDENT_ADDR + 0x180000100UL)
- #define LCA_IOC_W_BASE1 (IDENT_ADDR + 0x180000120UL)
- #define LCA_IOC_W_MASK0 (IDENT_ADDR + 0x180000140UL)
- #define LCA_IOC_W_MASK1 (IDENT_ADDR + 0x180000160UL)
- #define LCA_IOC_T_BASE0 (IDENT_ADDR + 0x180000180UL)
- #define LCA_IOC_T_BASE1 (IDENT_ADDR + 0x1800001a0UL)
- #define LCA_IOC_TB_TAG0 (IDENT_ADDR + 0x188000000UL)
- #define LCA_IOC_TB_TAG1 (IDENT_ADDR + 0x188000020UL)
- #define LCA_IOC_TB_TAG2 (IDENT_ADDR + 0x188000040UL)
- #define LCA_IOC_TB_TAG3 (IDENT_ADDR + 0x188000060UL)
- #define LCA_IOC_TB_TAG4 (IDENT_ADDR + 0x188000070UL)
- #define LCA_IOC_TB_TAG5 (IDENT_ADDR + 0x1880000a0UL)
- #define LCA_IOC_TB_TAG6 (IDENT_ADDR + 0x1880000c0UL)
- #define LCA_IOC_TB_TAG7 (IDENT_ADDR + 0x1880000e0UL)
-
- /*
- * Memory spaces:
- */
- #define LCA_IACK_SC (IDENT_ADDR + 0x1a0000000UL)
- #define LCA_CONF (IDENT_ADDR + 0x1e0000000UL)
- #define LCA_IO (IDENT_ADDR + 0x1c0000000UL)
- #define LCA_SPARSE_MEM (IDENT_ADDR + 0x200000000UL)
- #define LCA_DENSE_MEM (IDENT_ADDR + 0x300000000UL)
-
- /*
- * Bit definitions for I/O Controller status register 0:
- */
- #define LCA_IOC_STAT0_CMD 0xf
- #define LCA_IOC_STAT0_ERR (1<<4)
- #define LCA_IOC_STAT0_LOST (1<<5)
- #define LCA_IOC_STAT0_THIT (1<<6)
- #define LCA_IOC_STAT0_TREF (1<<7)
- #define LCA_IOC_STAT0_CODE_SHIFT 8
- #define LCA_IOC_STAT0_CODE_MASK 0x7
- #define LCA_IOC_STAT0_P_NBR_SHIFT 13
- #define LCA_IOC_STAT0_P_NBR_MASK 0x7ffff
-
- /*
- * I/O functions:
- *
- * Unlike Jensen, the Noname machines have no concept of local
- * I/O---everything goes over the PCI bus.
- *
- * There is plenty room for optimization here. In particular,
- * the Alpha's insb/insw/extb/extw should be useful in moving
- * data to/from the right byte-lanes.
- */
-
- extern inline unsigned int
- inb(unsigned long addr)
- {
- long result = *(volatile int *) ((addr << 5) + LCA_IO + 0x00);
- result >>= (addr & 3) * 8;
- return 0xffUL & result;
- }
-
- extern inline unsigned int
- inw(unsigned long addr)
- {
- long result = *(volatile int *) ((addr << 5) + LCA_IO + 0x08);
- result >>= (addr & 3) * 8;
- return 0xffffUL & result;
- }
-
- extern inline unsigned int
- inl(unsigned long addr)
- {
- return *(volatile unsigned int *) ((addr << 5) + LCA_IO + 0x18);
- }
-
- extern inline void
- outb(unsigned char b, unsigned long addr)
- {
- *(volatile unsigned int *) ((addr << 5) + LCA_IO + 0x00) = b * 0x01010101;
- mb();
- }
-
- extern inline void
- outw(unsigned char b, unsigned long addr)
- {
- *(volatile unsigned int *) ((addr << 5) + LCA_IO + 0x08) = b * 0x00010001;
- mb();
- }
-
- extern inline void
- outl(unsigned char b, unsigned long addr)
- {
- *(volatile unsigned int *) ((addr << 5) + LCA_IO + 0x18) = b;
- mb();
- }
-
-
- /*
- * Memory functions. 64-bit and 32-bit accesses are done through
- * dense memory space, everything else through sparse space.
- */
-
- extern inline unsigned long
- readb(unsigned long addr)
- {
- long result = *(volatile int *) ((addr << 5) + LCA_SPARSE_MEM + 0x00);
- result >>= (addr & 3) * 8;
- return 0xffUL & result;
- }
-
- extern inline unsigned long
- readw(unsigned long addr)
- {
- long result = *(volatile int *) ((addr << 5) + LCA_SPARSE_MEM + 0x08);
- result >>= (addr & 3) * 8;
- return 0xffffUL & result;
- }
-
- extern inline unsigned long
- readl(unsigned long addr)
- {
- return *(volatile int *) (addr + LCA_DENSE_MEM);
- }
-
- extern inline void
- writeb(unsigned short b, unsigned long addr)
- {
- *(volatile unsigned int *) ((addr << 5) + LCA_SPARSE_MEM + 0x00) =
- b * 0x01010101;
- }
-
- extern inline void
- writew(unsigned short b, unsigned long addr)
- {
- *(volatile unsigned int *) ((addr << 5) + LCA_SPARSE_MEM + 0x08) =
- b * 0x00010001;
- }
-
- extern inline void
- writel(unsigned short b, unsigned long addr)
- {
- *(volatile unsigned int *) (addr + LCA_DENSE_MEM) = b;
- }
-
- #define inb_local inb
- #define outb_local outb
- #define inb_p inb
- #define outb_p outb
-
- #endif
-