Linux-2.6.12-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!

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);