1 files changed, 346 insertions, 0 deletions

diff --git a/arch/alpha/include/asm/jensen.h b/arch/alpha/include/asm/jensen.h
new file mode 100644
index 000000000000..964b06ead43b
--- /dev/null
+++ b/arch/alpha/include/asm/jensen.h
@@ -0,0 +1,346 @@
+#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 */