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, 331 insertions, 0 deletions

diff --git a/arch/arm/lib/csumpartialcopygeneric.S b/arch/arm/lib/csumpartialcopygeneric.S
new file mode 100644
index 000000000000..d3a2f4667db4
--- /dev/null
+++ b/arch/arm/lib/csumpartialcopygeneric.S
@@ -0,0 +1,331 @@
+/*
+ *  linux/arch/arm/lib/csumpartialcopygeneric.S
+ *
+ *  Copyright (C) 1995-2001 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * unsigned int
+ * csum_partial_copy_xxx(const char *src, char *dst, int len, int sum, )
+ *  r0 = src, r1 = dst, r2 = len, r3 = sum
+ *  Returns : r0 = checksum
+ *
+ * Note that 'tst' and 'teq' preserve the carry flag.
+ */
+
+src     .req    r0
+dst     .req    r1
+len     .req    r2
+sum     .req    r3
+
+.zero:          mov     r0, sum
+                load_regs       ea
+
+                /*
+                 * Align an unaligned destination pointer.  We know that
+                 * we have >= 8 bytes here, so we don't need to check
+                 * the length.  Note that the source pointer hasn't been
+                 * aligned yet.
+                 */
+.dst_unaligned: tst     dst, #1
+                beq     .dst_16bit
+
+                load1b  ip
+                sub     len, len, #1
+                adcs    sum, sum, ip, put_byte_1        @ update checksum
+                strb    ip, [dst], #1
+                tst     dst, #2
+                moveq   pc, lr                  @ dst is now 32bit aligned
+
+.dst_16bit:     load2b  r8, ip
+                sub     len, len, #2
+                adcs    sum, sum, r8, put_byte_0
+                strb    r8, [dst], #1
+                adcs    sum, sum, ip, put_byte_1
+                strb    ip, [dst], #1
+                mov     pc, lr                  @ dst is now 32bit aligned
+
+                /*
+                 * Handle 0 to 7 bytes, with any alignment of source and
+                 * destination pointers.  Note that when we get here, C = 0
+                 */
+.less8:         teq     len, #0                 @ check for zero count
+                beq     .zero
+
+                /* we must have at least one byte. */
+                tst     dst, #1                 @ dst 16-bit aligned
+                beq     .less8_aligned
+
+                /* Align dst */
+                load1b  ip
+                sub     len, len, #1
+                adcs    sum, sum, ip, put_byte_1        @ update checksum
+                strb    ip, [dst], #1
+                tst     len, #6
+                beq     .less8_byteonly
+
+1:              load2b  r8, ip
+                sub     len, len, #2
+                adcs    sum, sum, r8, put_byte_0
+                strb    r8, [dst], #1
+                adcs    sum, sum, ip, put_byte_1
+                strb    ip, [dst], #1
+.less8_aligned: tst     len, #6
+                bne     1b
+.less8_byteonly:
+                tst     len, #1
+                beq     .done
+                load1b  r8
+                adcs    sum, sum, r8, put_byte_0        @ update checksum
+                strb    r8, [dst], #1
+                b       .done
+
+FN_ENTRY
+                mov     ip, sp
+                save_regs
+                sub     fp, ip, #4
+
+                cmp     len, #8                 @ Ensure that we have at least
+                blo     .less8                  @ 8 bytes to copy.
+
+                adds    sum, sum, #0            @ C = 0
+                tst     dst, #3                 @ Test destination alignment
+                blne    .dst_unaligned          @ align destination, return here
+
+                /*
+                 * Ok, the dst pointer is now 32bit aligned, and we know
+                 * that we must have more than 4 bytes to copy.  Note
+                 * that C contains the carry from the dst alignment above.
+                 */
+
+                tst     src, #3                 @ Test source alignment
+                bne     .src_not_aligned
+
+                /* Routine for src & dst aligned */
+
+                bics    ip, len, #15
+                beq     2f
+
+1:              load4l  r4, r5, r6, r7
+                stmia   dst!, {r4, r5, r6, r7}
+                adcs    sum, sum, r4
+                adcs    sum, sum, r5
+                adcs    sum, sum, r6
+                adcs    sum, sum, r7
+                sub     ip, ip, #16
+                teq     ip, #0
+                bne     1b
+
+2:              ands    ip, len, #12
+                beq     4f
+                tst     ip, #8
+                beq     3f
+                load2l  r4, r5
+                stmia   dst!, {r4, r5}
+                adcs    sum, sum, r4
+                adcs    sum, sum, r5
+                tst     ip, #4
+                beq     4f
+
+3:              load1l  r4
+                str     r4, [dst], #4
+                adcs    sum, sum, r4
+
+4:              ands    len, len, #3
+                beq     .done
+                load1l  r4
+                tst     len, #2
+                mov     r5, r4, get_byte_0
+                beq     .exit
+                adcs    sum, sum, r4, push #16
+                strb    r5, [dst], #1
+                mov     r5, r4, get_byte_1
+                strb    r5, [dst], #1
+                mov     r5, r4, get_byte_2
+.exit:          tst     len, #1
+                strneb  r5, [dst], #1
+                andne   r5, r5, #255
+                adcnes  sum, sum, r5, put_byte_0
+
+                /*
+                 * If the dst pointer was not 16-bit aligned, we
+                 * need to rotate the checksum here to get around
+                 * the inefficient byte manipulations in the
+                 * architecture independent code.
+                 */
+.done:          adc     r0, sum, #0
+                ldr     sum, [sp, #0]           @ dst
+                tst     sum, #1
+                movne   r0, r0, ror #8
+                load_regs       ea
+
+.src_not_aligned:
+                adc     sum, sum, #0            @ include C from dst alignment
+                and     ip, src, #3
+                bic     src, src, #3
+                load1l  r5
+                cmp     ip, #2
+                beq     .src2_aligned
+                bhi     .src3_aligned
+                mov     r4, r5, pull #8         @ C = 0
+                bics    ip, len, #15
+                beq     2f
+1:              load4l  r5, r6, r7, r8
+                orr     r4, r4, r5, push #24
+                mov     r5, r5, pull #8
+                orr     r5, r5, r6, push #24
+                mov     r6, r6, pull #8
+                orr     r6, r6, r7, push #24
+                mov     r7, r7, pull #8
+                orr     r7, r7, r8, push #24
+                stmia   dst!, {r4, r5, r6, r7}
+                adcs    sum, sum, r4
+                adcs    sum, sum, r5
+                adcs    sum, sum, r6
+                adcs    sum, sum, r7
+                mov     r4, r8, pull #8
+                sub     ip, ip, #16
+                teq     ip, #0
+                bne     1b
+2:              ands    ip, len, #12
+                beq     4f
+                tst     ip, #8
+                beq     3f
+                load2l  r5, r6
+                orr     r4, r4, r5, push #24
+                mov     r5, r5, pull #8
+                orr     r5, r5, r6, push #24
+                stmia   dst!, {r4, r5}
+                adcs    sum, sum, r4
+                adcs    sum, sum, r5
+                mov     r4, r6, pull #8
+                tst     ip, #4
+                beq     4f
+3:              load1l  r5
+                orr     r4, r4, r5, push #24
+                str     r4, [dst], #4
+                adcs    sum, sum, r4
+                mov     r4, r5, pull #8
+4:              ands    len, len, #3
+                beq     .done
+                mov     r5, r4, get_byte_0
+                tst     len, #2
+                beq     .exit
+                adcs    sum, sum, r4, push #16
+                strb    r5, [dst], #1
+                mov     r5, r4, get_byte_1
+                strb    r5, [dst], #1
+                mov     r5, r4, get_byte_2
+                b       .exit
+
+.src2_aligned:  mov     r4, r5, pull #16
+                adds    sum, sum, #0
+                bics    ip, len, #15
+                beq     2f
+1:              load4l  r5, r6, r7, r8
+                orr     r4, r4, r5, push #16
+                mov     r5, r5, pull #16
+                orr     r5, r5, r6, push #16
+                mov     r6, r6, pull #16
+                orr     r6, r6, r7, push #16
+                mov     r7, r7, pull #16
+                orr     r7, r7, r8, push #16
+                stmia   dst!, {r4, r5, r6, r7}
+                adcs    sum, sum, r4
+                adcs    sum, sum, r5
+                adcs    sum, sum, r6
+                adcs    sum, sum, r7
+                mov     r4, r8, pull #16
+                sub     ip, ip, #16
+                teq     ip, #0
+                bne     1b
+2:              ands    ip, len, #12
+                beq     4f
+                tst     ip, #8
+                beq     3f
+                load2l  r5, r6
+                orr     r4, r4, r5, push #16
+                mov     r5, r5, pull #16
+                orr     r5, r5, r6, push #16
+                stmia   dst!, {r4, r5}
+                adcs    sum, sum, r4
+                adcs    sum, sum, r5
+                mov     r4, r6, pull #16
+                tst     ip, #4
+                beq     4f
+3:              load1l  r5
+                orr     r4, r4, r5, push #16
+                str     r4, [dst], #4
+                adcs    sum, sum, r4
+                mov     r4, r5, pull #16
+4:              ands    len, len, #3
+                beq     .done
+                mov     r5, r4, get_byte_0
+                tst     len, #2
+                beq     .exit
+                adcs    sum, sum, r4
+                strb    r5, [dst], #1
+                mov     r5, r4, get_byte_1
+                strb    r5, [dst], #1
+                tst     len, #1
+                beq     .done
+                load1b  r5
+                b       .exit
+
+.src3_aligned:  mov     r4, r5, pull #24
+                adds    sum, sum, #0
+                bics    ip, len, #15
+                beq     2f
+1:              load4l  r5, r6, r7, r8
+                orr     r4, r4, r5, push #8
+                mov     r5, r5, pull #24
+                orr     r5, r5, r6, push #8
+                mov     r6, r6, pull #24
+                orr     r6, r6, r7, push #8
+                mov     r7, r7, pull #24
+                orr     r7, r7, r8, push #8
+                stmia   dst!, {r4, r5, r6, r7}
+                adcs    sum, sum, r4
+                adcs    sum, sum, r5
+                adcs    sum, sum, r6
+                adcs    sum, sum, r7
+                mov     r4, r8, pull #24
+                sub     ip, ip, #16
+                teq     ip, #0
+                bne     1b
+2:              ands    ip, len, #12
+                beq     4f
+                tst     ip, #8
+                beq     3f
+                load2l  r5, r6
+                orr     r4, r4, r5, push #8
+                mov     r5, r5, pull #24
+                orr     r5, r5, r6, push #8
+                stmia   dst!, {r4, r5}
+                adcs    sum, sum, r4
+                adcs    sum, sum, r5
+                mov     r4, r6, pull #24
+                tst     ip, #4
+                beq     4f
+3:              load1l  r5
+                orr     r4, r4, r5, push #8
+                str     r4, [dst], #4
+                adcs    sum, sum, r4
+                mov     r4, r5, pull #24
+4:              ands    len, len, #3
+                beq     .done
+                mov     r5, r4, get_byte_0
+                tst     len, #2
+                beq     .exit
+                strb    r5, [dst], #1
+                adcs    sum, sum, r4
+                load1l  r4
+                mov     r5, r4, get_byte_0
+                strb    r5, [dst], #1
+                adcs    sum, sum, r4, push #24
+                mov     r5, r4, get_byte_1
+                b       .exit