Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 630 insertions, 0 deletions

diff --git a/arch/alpha/kernel/io.c b/arch/alpha/kernel/io.c
new file mode 100644
index 000000000000..19c5875ab398
--- /dev/null
+++ b/arch/alpha/kernel/io.c
@@ -0,0 +1,630 @@
+/*
+ * Alpha IO and memory functions.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/module.h>
+#include <asm/io.h>
+
+/* Out-of-line versions of the i/o routines that redirect into the 
+   platform-specific version.  Note that "platform-specific" may mean
+   "generic", which bumps through the machine vector.  */
+
+unsigned int
+ioread8(void __iomem *addr)
+{
+        unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread8)(addr);
+        mb();
+        return ret;
+}
+
+unsigned int ioread16(void __iomem *addr)
+{
+        unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread16)(addr);
+        mb();
+        return ret;
+}
+
+unsigned int ioread32(void __iomem *addr)
+{
+        unsigned int ret = IO_CONCAT(__IO_PREFIX,ioread32)(addr);
+        mb();
+        return ret;
+}
+
+void iowrite8(u8 b, void __iomem *addr)
+{
+        IO_CONCAT(__IO_PREFIX,iowrite8)(b, addr);
+        mb();
+}
+
+void iowrite16(u16 b, void __iomem *addr)
+{
+        IO_CONCAT(__IO_PREFIX,iowrite16)(b, addr);
+        mb();
+}
+
+void iowrite32(u32 b, void __iomem *addr)
+{
+        IO_CONCAT(__IO_PREFIX,iowrite32)(b, addr);
+        mb();
+}
+
+EXPORT_SYMBOL(ioread8);
+EXPORT_SYMBOL(ioread16);
+EXPORT_SYMBOL(ioread32);
+EXPORT_SYMBOL(iowrite8);
+EXPORT_SYMBOL(iowrite16);
+EXPORT_SYMBOL(iowrite32);
+
+u8 inb(unsigned long port)
+{
+        return ioread8(ioport_map(port, 1));
+}
+
+u16 inw(unsigned long port)
+{
+        return ioread16(ioport_map(port, 2));
+}
+
+u32 inl(unsigned long port)
+{
+        return ioread32(ioport_map(port, 4));
+}
+
+void outb(u8 b, unsigned long port)
+{
+        iowrite8(b, ioport_map(port, 1));
+}
+
+void outw(u16 b, unsigned long port)
+{
+        iowrite16(b, ioport_map(port, 2));
+}
+
+void outl(u32 b, unsigned long port)
+{
+        iowrite32(b, ioport_map(port, 4));
+}
+
+EXPORT_SYMBOL(inb);
+EXPORT_SYMBOL(inw);
+EXPORT_SYMBOL(inl);
+EXPORT_SYMBOL(outb);
+EXPORT_SYMBOL(outw);
+EXPORT_SYMBOL(outl);
+
+u8 __raw_readb(const volatile void __iomem *addr)
+{
+        return IO_CONCAT(__IO_PREFIX,readb)(addr);
+}
+
+u16 __raw_readw(const volatile void __iomem *addr)
+{
+        return IO_CONCAT(__IO_PREFIX,readw)(addr);
+}
+
+u32 __raw_readl(const volatile void __iomem *addr)
+{
+        return IO_CONCAT(__IO_PREFIX,readl)(addr);
+}
+
+u64 __raw_readq(const volatile void __iomem *addr)
+{
+        return IO_CONCAT(__IO_PREFIX,readq)(addr);
+}
+
+void __raw_writeb(u8 b, volatile void __iomem *addr)
+{
+        IO_CONCAT(__IO_PREFIX,writeb)(b, addr);
+}
+
+void __raw_writew(u16 b, volatile void __iomem *addr)
+{
+        IO_CONCAT(__IO_PREFIX,writew)(b, addr);
+}
+
+void __raw_writel(u32 b, volatile void __iomem *addr)
+{
+        IO_CONCAT(__IO_PREFIX,writel)(b, addr);
+}
+
+void __raw_writeq(u64 b, volatile void __iomem *addr)
+{
+        IO_CONCAT(__IO_PREFIX,writeq)(b, addr);
+}
+
+EXPORT_SYMBOL(__raw_readb); 
+EXPORT_SYMBOL(__raw_readw); 
+EXPORT_SYMBOL(__raw_readl); 
+EXPORT_SYMBOL(__raw_readq); 
+EXPORT_SYMBOL(__raw_writeb); 
+EXPORT_SYMBOL(__raw_writew); 
+EXPORT_SYMBOL(__raw_writel); 
+EXPORT_SYMBOL(__raw_writeq); 
+
+u8 readb(const volatile void __iomem *addr)
+{
+        u8 ret = __raw_readb(addr);
+        mb();
+        return ret;
+}
+
+u16 readw(const volatile void __iomem *addr)
+{
+        u16 ret = __raw_readw(addr);
+        mb();
+        return ret;
+}
+
+u32 readl(const volatile void __iomem *addr)
+{
+        u32 ret = __raw_readl(addr);
+        mb();
+        return ret;
+}
+
+u64 readq(const volatile void __iomem *addr)
+{
+        u64 ret = __raw_readq(addr);
+        mb();
+        return ret;
+}
+
+void writeb(u8 b, volatile void __iomem *addr)
+{
+        __raw_writeb(b, addr);
+        mb();
+}
+
+void writew(u16 b, volatile void __iomem *addr)
+{
+        __raw_writew(b, addr);
+        mb();
+}
+
+void writel(u32 b, volatile void __iomem *addr)
+{
+        __raw_writel(b, addr);
+        mb();
+}
+
+void writeq(u64 b, volatile void __iomem *addr)
+{
+        __raw_writeq(b, addr);
+        mb();
+}
+
+EXPORT_SYMBOL(readb);
+EXPORT_SYMBOL(readw);
+EXPORT_SYMBOL(readl);
+EXPORT_SYMBOL(readq);
+EXPORT_SYMBOL(writeb);
+EXPORT_SYMBOL(writew);
+EXPORT_SYMBOL(writel);
+EXPORT_SYMBOL(writeq);
+
+
+/*
+ * Read COUNT 8-bit bytes from port PORT into memory starting at SRC.
+ */
+void ioread8_rep(void __iomem *port, void *dst, unsigned long count)
+{
+        while ((unsigned long)dst & 0x3) {
+                if (!count)
+                        return;
+                count--;
+                *(unsigned char *)dst = ioread8(port);
+                dst += 1;
+        }
+
+        while (count >= 4) {
+                unsigned int w;
+                count -= 4;
+                w = ioread8(port);
+                w |= ioread8(port) << 8;
+                w |= ioread8(port) << 16;
+                w |= ioread8(port) << 24;
+                *(unsigned int *)dst = w;
+                dst += 4;
+        }
+
+        while (count) {
+                --count;
+                *(unsigned char *)dst = ioread8(port);
+                dst += 1;
+        }
+}
+
+void insb(unsigned long port, void *dst, unsigned long count)
+{
+        ioread8_rep(ioport_map(port, 1), dst, count);
+}
+
+EXPORT_SYMBOL(ioread8_rep);
+EXPORT_SYMBOL(insb);
+
+/*
+ * Read COUNT 16-bit words from port PORT into memory starting at
+ * SRC.  SRC must be at least short aligned.  This is used by the
+ * IDE driver to read disk sectors.  Performance is important, but
+ * the interfaces seems to be slow: just using the inlined version
+ * of the inw() breaks things.
+ */
+void ioread16_rep(void __iomem *port, void *dst, unsigned long count)
+{
+        if (unlikely((unsigned long)dst & 0x3)) {
+                if (!count)
+                        return;
+                BUG_ON((unsigned long)dst & 0x1);
+                count--;
+                *(unsigned short *)dst = ioread16(port);
+                dst += 2;
+        }
+
+        while (count >= 2) {
+                unsigned int w;
+                count -= 2;
+                w = ioread16(port);
+                w |= ioread16(port) << 16;
+                *(unsigned int *)dst = w;
+                dst += 4;
+        }
+
+        if (count) {
+                *(unsigned short*)dst = ioread16(port);
+        }
+}
+
+void insw(unsigned long port, void *dst, unsigned long count)
+{
+        ioread16_rep(ioport_map(port, 2), dst, count);
+}
+
+EXPORT_SYMBOL(ioread16_rep);
+EXPORT_SYMBOL(insw);
+
+
+/*
+ * Read COUNT 32-bit words from port PORT into memory starting at
+ * SRC. Now works with any alignment in SRC. Performance is important,
+ * but the interfaces seems to be slow: just using the inlined version
+ * of the inl() breaks things.
+ */
+void ioread32_rep(void __iomem *port, void *dst, unsigned long count)
+{
+        if (unlikely((unsigned long)dst & 0x3)) {
+                while (count--) {
+                        struct S { int x __attribute__((packed)); };
+                        ((struct S *)dst)->x = ioread32(port);
+                        dst += 4;
+                }
+        } else {
+                /* Buffer 32-bit aligned.  */
+                while (count--) {
+                        *(unsigned int *)dst = ioread32(port);
+                        dst += 4;
+                }
+        }
+}
+
+void insl(unsigned long port, void *dst, unsigned long count)
+{
+        ioread32_rep(ioport_map(port, 4), dst, count);
+}
+
+EXPORT_SYMBOL(ioread32_rep);
+EXPORT_SYMBOL(insl);
+
+
+/*
+ * Like insb but in the opposite direction.
+ * Don't worry as much about doing aligned memory transfers:
+ * doing byte reads the "slow" way isn't nearly as slow as
+ * doing byte writes the slow way (no r-m-w cycle).
+ */
+void iowrite8_rep(void __iomem *port, const void *xsrc, unsigned long count)
+{
+        const unsigned char *src = xsrc;
+        while (count--)
+                iowrite8(*src++, port);
+}
+
+void outsb(unsigned long port, const void *src, unsigned long count)
+{
+        iowrite8_rep(ioport_map(port, 1), src, count);
+}
+
+EXPORT_SYMBOL(iowrite8_rep);
+EXPORT_SYMBOL(outsb);
+
+
+/*
+ * Like insw but in the opposite direction.  This is used by the IDE
+ * driver to write disk sectors.  Performance is important, but the
+ * interfaces seems to be slow: just using the inlined version of the
+ * outw() breaks things.
+ */
+void iowrite16_rep(void __iomem *port, const void *src, unsigned long count)
+{
+        if (unlikely((unsigned long)src & 0x3)) {
+                if (!count)
+                        return;
+                BUG_ON((unsigned long)src & 0x1);
+                iowrite16(*(unsigned short *)src, port);
+                src += 2;
+                --count;
+        }
+
+        while (count >= 2) {
+                unsigned int w;
+                count -= 2;
+                w = *(unsigned int *)src;
+                src += 4;
+                iowrite16(w >>  0, port);
+                iowrite16(w >> 16, port);
+        }
+
+        if (count) {
+                iowrite16(*(unsigned short *)src, port);
+        }
+}
+
+void outsw(unsigned long port, const void *src, unsigned long count)
+{
+        iowrite16_rep(ioport_map(port, 2), src, count);
+}
+
+EXPORT_SYMBOL(iowrite16_rep);
+EXPORT_SYMBOL(outsw);
+
+
+/*
+ * Like insl but in the opposite direction.  This is used by the IDE
+ * driver to write disk sectors.  Works with any alignment in SRC.
+ * Performance is important, but the interfaces seems to be slow:
+ * just using the inlined version of the outl() breaks things.
+ */
+void iowrite32_rep(void __iomem *port, const void *src, unsigned long count)
+{
+        if (unlikely((unsigned long)src & 0x3)) {
+                while (count--) {
+                        struct S { int x __attribute__((packed)); };
+                        iowrite32(((struct S *)src)->x, port);
+                        src += 4;
+                }
+        } else {
+                /* Buffer 32-bit aligned.  */
+                while (count--) {
+                        iowrite32(*(unsigned int *)src, port);
+                        src += 4;
+                }
+        }
+}
+
+void outsl(unsigned long port, const void *src, unsigned long count)
+{
+        iowrite32_rep(ioport_map(port, 4), src, count);
+}
+
+EXPORT_SYMBOL(iowrite32_rep);
+EXPORT_SYMBOL(outsl);
+
+
+/*
+ * Copy data from IO memory space to "real" memory space.
+ * This needs to be optimized.
+ */
+void memcpy_fromio(void *to, const volatile void __iomem *from, long count)
+{
+        /* Optimize co-aligned transfers.  Everything else gets handled
+           a byte at a time. */
+
+        if (count >= 8 && ((u64)to & 7) == ((u64)from & 7)) {
+                count -= 8;
+                do {
+                        *(u64 *)to = __raw_readq(from);
+                        count -= 8;
+                        to += 8;
+                        from += 8;
+                } while (count >= 0);
+                count += 8;
+        }
+
+        if (count >= 4 && ((u64)to & 3) == ((u64)from & 3)) {
+                count -= 4;
+                do {
+                        *(u32 *)to = __raw_readl(from);
+                        count -= 4;
+                        to += 4;
+                        from += 4;
+                } while (count >= 0);
+                count += 4;
+        }
+
+        if (count >= 2 && ((u64)to & 1) == ((u64)from & 1)) {
+                count -= 2;
+                do {
+                        *(u16 *)to = __raw_readw(from);
+                        count -= 2;
+                        to += 2;
+                        from += 2;
+                } while (count >= 0);
+                count += 2;
+        }
+
+        while (count > 0) {
+                *(u8 *) to = __raw_readb(from);
+                count--;
+                to++;
+                from++;
+        }
+        mb();
+}
+
+EXPORT_SYMBOL(memcpy_fromio);
+
+
+/*
+ * Copy data from "real" memory space to IO memory space.
+ * This needs to be optimized.
+ */
+void memcpy_toio(volatile void __iomem *to, const void *from, long count)
+{
+        /* Optimize co-aligned transfers.  Everything else gets handled
+           a byte at a time. */
+        /* FIXME -- align FROM.  */
+
+        if (count >= 8 && ((u64)to & 7) == ((u64)from & 7)) {
+                count -= 8;
+                do {
+                        __raw_writeq(*(const u64 *)from, to);
+                        count -= 8;
+                        to += 8;
+                        from += 8;
+                } while (count >= 0);
+                count += 8;
+        }
+
+        if (count >= 4 && ((u64)to & 3) == ((u64)from & 3)) {
+                count -= 4;
+                do {
+                        __raw_writel(*(const u32 *)from, to);
+                        count -= 4;
+                        to += 4;
+                        from += 4;
+                } while (count >= 0);
+                count += 4;
+        }
+
+        if (count >= 2 && ((u64)to & 1) == ((u64)from & 1)) {
+                count -= 2;
+                do {
+                        __raw_writew(*(const u16 *)from, to);
+                        count -= 2;
+                        to += 2;
+                        from += 2;
+                } while (count >= 0);
+                count += 2;
+        }
+
+        while (count > 0) {
+                __raw_writeb(*(const u8 *) from, to);
+                count--;
+                to++;
+                from++;
+        }
+        mb();
+}
+
+EXPORT_SYMBOL(memcpy_toio);
+
+
+/*
+ * "memset" on IO memory space.
+ */
+void _memset_c_io(volatile void __iomem *to, unsigned long c, long count)
+{
+        /* Handle any initial odd byte */
+        if (count > 0 && ((u64)to & 1)) {
+                __raw_writeb(c, to);
+                to++;
+                count--;
+        }
+
+        /* Handle any initial odd halfword */
+        if (count >= 2 && ((u64)to & 2)) {
+                __raw_writew(c, to);
+                to += 2;
+                count -= 2;
+        }
+
+        /* Handle any initial odd word */
+        if (count >= 4 && ((u64)to & 4)) {
+                __raw_writel(c, to);
+                to += 4;
+                count -= 4;
+        }
+
+        /* Handle all full-sized quadwords: we're aligned
+           (or have a small count) */
+        count -= 8;
+        if (count >= 0) {
+                do {
+                        __raw_writeq(c, to);
+                        to += 8;
+                        count -= 8;
+                } while (count >= 0);
+        }
+        count += 8;
+
+        /* The tail is word-aligned if we still have count >= 4 */
+        if (count >= 4) {
+                __raw_writel(c, to);
+                to += 4;
+                count -= 4;
+        }
+
+        /* The tail is half-word aligned if we have count >= 2 */
+        if (count >= 2) {
+                __raw_writew(c, to);
+                to += 2;
+                count -= 2;
+        }
+
+        /* And finally, one last byte.. */
+        if (count) {
+                __raw_writeb(c, to);
+        }
+        mb();
+}
+
+EXPORT_SYMBOL(_memset_c_io);
+
+/* A version of memcpy used by the vga console routines to move data around
+   arbitrarily between screen and main memory.  */
+
+void
+scr_memcpyw(u16 *d, const u16 *s, unsigned int count)
+{
+        const u16 __iomem *ios = (const u16 __iomem *) s;
+        u16 __iomem *iod = (u16 __iomem *) d;
+        int s_isio = __is_ioaddr(s);
+        int d_isio = __is_ioaddr(d);
+
+        if (s_isio) {
+                if (d_isio) {
+                        /* FIXME: Should handle unaligned ops and
+                           operation widening.  */
+
+                        count /= 2;
+                        while (count--) {
+                                u16 tmp = __raw_readw(ios++);
+                                __raw_writew(tmp, iod++);
+                        }
+                }
+                else
+                        memcpy_fromio(d, ios, count);
+        } else {
+                if (d_isio)
+                        memcpy_toio(iod, s, count);
+                else
+                        memcpy(d, s, count);
+        }
+}
+
+EXPORT_SYMBOL(scr_memcpyw);
+
+void __iomem *ioport_map(unsigned long port, unsigned int size)
+{
+        return IO_CONCAT(__IO_PREFIX,ioportmap) (port);
+}
+
+void ioport_unmap(void __iomem *addr)
+{
+}
+
+EXPORT_SYMBOL(ioport_map);
+EXPORT_SYMBOL(ioport_unmap);