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!
diff --git a/include/asm-sparc64/checksum.h b/include/asm-sparc64/checksum.h
new file mode 100644
index 0000000..dc8bed2
--- /dev/null
+++ b/include/asm-sparc64/checksum.h
@@ -0,0 +1,173 @@
+/* $Id: checksum.h,v 1.19 2002/02/09 19:49:31 davem Exp $ */
+#ifndef __SPARC64_CHECKSUM_H
+#define __SPARC64_CHECKSUM_H
+
+/* checksum.h: IP/UDP/TCP checksum routines on the V9.
+ *
+ * Copyright(C) 1995 Linus Torvalds
+ * Copyright(C) 1995 Miguel de Icaza
+ * Copyright(C) 1996 David S. Miller
+ * Copyright(C) 1996 Eddie C. Dost
+ * Copyright(C) 1997 Jakub Jelinek
+ *
+ * derived from:
+ * Alpha checksum c-code
+ * ix86 inline assembly
+ * RFC1071 Computing the Internet Checksum
+ */
+
+#include <linux/in6.h>
+#include <asm/uaccess.h>
+
+/* computes the checksum of a memory block at buff, length len,
+ * and adds in "sum" (32-bit)
+ *
+ * returns a 32-bit number suitable for feeding into itself
+ * or csum_tcpudp_magic
+ *
+ * this function must be called with even lengths, except
+ * for the last fragment, which may be odd
+ *
+ * it's best to have buff aligned on a 32-bit boundary
+ */
+extern unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum);
+
+/* the same as csum_partial, but copies from user space while it
+ * checksums
+ *
+ * here even more important to align src and dst on a 32-bit (or even
+ * better 64-bit) boundary
+ */
+extern unsigned int csum_partial_copy_nocheck(const unsigned char *src,
+ unsigned char *dst,
+ int len, unsigned int sum);
+
+extern long __csum_partial_copy_from_user(const unsigned char __user *src,
+ unsigned char *dst, int len,
+ unsigned int sum);
+
+static inline unsigned int
+csum_partial_copy_from_user(const unsigned char __user *src,
+ unsigned char *dst, int len,
+ unsigned int sum, int *err)
+{
+ long ret = __csum_partial_copy_from_user(src, dst, len, sum);
+ if (ret < 0)
+ *err = -EFAULT;
+ return (unsigned int) ret;
+}
+
+/*
+ * Copy and checksum to user
+ */
+#define HAVE_CSUM_COPY_USER
+extern long __csum_partial_copy_to_user(const unsigned char *src,
+ unsigned char __user *dst, int len,
+ unsigned int sum);
+
+static inline unsigned int
+csum_and_copy_to_user(const unsigned char *src,
+ unsigned char __user *dst, int len,
+ unsigned int sum, int *err)
+{
+ long ret = __csum_partial_copy_to_user(src, dst, len, sum);
+ if (ret < 0)
+ *err = -EFAULT;
+ return (unsigned int) ret;
+}
+
+/* ihl is always 5 or greater, almost always is 5, and iph is word aligned
+ * the majority of the time.
+ */
+extern unsigned short ip_fast_csum(__const__ unsigned char *iph,
+ unsigned int ihl);
+
+/* Fold a partial checksum without adding pseudo headers. */
+static inline unsigned short csum_fold(unsigned int sum)
+{
+ unsigned int tmp;
+
+ __asm__ __volatile__(
+" addcc %0, %1, %1\n"
+" srl %1, 16, %1\n"
+" addc %1, %%g0, %1\n"
+" xnor %%g0, %1, %0\n"
+ : "=&r" (sum), "=r" (tmp)
+ : "0" (sum), "1" (sum<<16)
+ : "cc");
+ return (sum & 0xffff);
+}
+
+static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
+ unsigned long daddr,
+ unsigned int len,
+ unsigned short proto,
+ unsigned int sum)
+{
+ __asm__ __volatile__(
+" addcc %1, %0, %0\n"
+" addccc %2, %0, %0\n"
+" addccc %3, %0, %0\n"
+" addc %0, %%g0, %0\n"
+ : "=r" (sum), "=r" (saddr)
+ : "r" (daddr), "r" ((proto<<16)+len), "0" (sum), "1" (saddr)
+ : "cc");
+ return sum;
+}
+
+/*
+ * computes the checksum of the TCP/UDP pseudo-header
+ * returns a 16-bit checksum, already complemented
+ */
+static inline unsigned short int csum_tcpudp_magic(unsigned long saddr,
+ unsigned long daddr,
+ unsigned short len,
+ unsigned short proto,
+ unsigned int sum)
+{
+ return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
+}
+
+#define _HAVE_ARCH_IPV6_CSUM
+
+static inline unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
+ struct in6_addr *daddr,
+ __u32 len,
+ unsigned short proto,
+ unsigned int sum)
+{
+ __asm__ __volatile__ (
+" addcc %3, %4, %%g7\n"
+" addccc %5, %%g7, %%g7\n"
+" lduw [%2 + 0x0c], %%g2\n"
+" lduw [%2 + 0x08], %%g3\n"
+" addccc %%g2, %%g7, %%g7\n"
+" lduw [%2 + 0x04], %%g2\n"
+" addccc %%g3, %%g7, %%g7\n"
+" lduw [%2 + 0x00], %%g3\n"
+" addccc %%g2, %%g7, %%g7\n"
+" lduw [%1 + 0x0c], %%g2\n"
+" addccc %%g3, %%g7, %%g7\n"
+" lduw [%1 + 0x08], %%g3\n"
+" addccc %%g2, %%g7, %%g7\n"
+" lduw [%1 + 0x04], %%g2\n"
+" addccc %%g3, %%g7, %%g7\n"
+" lduw [%1 + 0x00], %%g3\n"
+" addccc %%g2, %%g7, %%g7\n"
+" addccc %%g3, %%g7, %0\n"
+" addc 0, %0, %0\n"
+ : "=&r" (sum)
+ : "r" (saddr), "r" (daddr), "r"(htonl(len)),
+ "r"(htonl(proto)), "r"(sum)
+ : "g2", "g3", "g7", "cc");
+
+ return csum_fold(sum);
+}
+
+/* this routine is used for miscellaneous IP-like checksums, mainly in icmp.c */
+static inline unsigned short ip_compute_csum(unsigned char * buff, int len)
+{
+ return csum_fold(csum_partial(buff, len, 0));
+}
+
+#endif /* !(__SPARC64_CHECKSUM_H) */