4 files changed, 156 insertions, 287 deletions

diff --git a/arch/blackfin/lib/checksum.c b/arch/blackfin/lib/checksum.c
index 5c87505165d3..762a7f02970a 100644
--- a/arch/blackfin/lib/checksum.c
+++ b/arch/blackfin/lib/checksum.c
@@ -29,6 +29,7 @@
  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
+#include <linux/module.h>
 #include <net/checksum.h>
 #include <asm/checksum.h>
 
@@ -76,6 +77,7 @@ __sum16 ip_fast_csum(unsigned char *iph, unsigned int ihl)
 {
         return (__force __sum16)~do_csum(iph, ihl * 4);
 }
+EXPORT_SYMBOL(ip_fast_csum);
 
 /*
  * computes the checksum of a memory block at buff, length len,
@@ -104,6 +106,7 @@ __wsum csum_partial(const void *buff, int len, __wsum sum)
 
         return sum;
 }
+EXPORT_SYMBOL(csum_partial);
 
 /*
  * this routine is used for miscellaneous IP-like checksums, mainly
@@ -137,3 +140,4 @@ __wsum csum_partial_copy(const void *src, void *dst, int len, __wsum sum)
         memcpy(dst, src, len);
         return csum_partial(dst, len, sum);
 }
+EXPORT_SYMBOL(csum_partial_copy);
diff --git a/arch/blackfin/lib/ins.S b/arch/blackfin/lib/ins.S
index d60554dce87b..1863a6ba507c 100644
--- a/arch/blackfin/lib/ins.S
+++ b/arch/blackfin/lib/ins.S
@@ -1,31 +1,9 @@
 /*
- * File:         arch/blackfin/lib/ins.S
- * Based on:
- * Author:       Bas Vermeulen <bas@buyways.nl>
+ * arch/blackfin/lib/ins.S - ins{bwl} using hardware loops
  *
- * Created:      Tue Mar 22 15:27:24 CEST 2005
- * Description:  Implementation of ins{bwl} for BlackFin processors using zero overhead loops.
- *
- * Modified:
- *               Copyright 2004-2008 Analog Devices Inc.
- *               Copyright (C) 2005 Bas Vermeulen, BuyWays BV <bas@buyways.nl>
- *
- * Bugs:         Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ * Copyright 2004-2008 Analog Devices Inc.
+ * Copyright (C) 2005 Bas Vermeulen, BuyWays BV <bas@buyways.nl>
+ * Licensed under the GPL-2 or later.
  */
 
 #include <linux/linkage.h>
@@ -33,6 +11,46 @@
 
 .align 2
 
+#ifdef CONFIG_IPIPE
+# define DO_CLI \
+        [--sp] = rets; \
+        [--sp] = (P5:0); \
+        sp += -12; \
+        call ___ipipe_stall_root_raw; \
+        sp += 12; \
+        (P5:0) = [sp++];
+# define CLI_INNER_NOP
+#else
+# define DO_CLI cli R3;
+# define CLI_INNER_NOP nop; nop; nop;
+#endif
+
+#ifdef CONFIG_IPIPE
+# define DO_STI \
+        sp += -12; \
+        call ___ipipe_unstall_root_raw; \
+        sp += 12; \
+2:      rets = [sp++];
+#else
+# define DO_STI 2: sti R3;
+#endif
+
+#ifdef CONFIG_BFIN_INS_LOWOVERHEAD
+# define CLI_OUTER DO_CLI;
+# define STI_OUTER DO_STI;
+# define CLI_INNER 1:
+# if ANOMALY_05000416
+#  define STI_INNER nop; 2: nop;
+# else
+#  define STI_INNER 2:
+# endif
+#else
+# define CLI_OUTER
+# define STI_OUTER
+# define CLI_INNER 1: DO_CLI; CLI_INNER_NOP;
+# define STI_INNER DO_STI;
+#endif
+
 /*
  * Reads on the Blackfin are speculative. In Blackfin terms, this means they
  * can be interrupted at any time (even after they have been issued on to the
@@ -53,170 +71,48 @@
  * buffers in/out of FIFOs.
  */
 
-ENTRY(_insl)
-#ifdef CONFIG_BFIN_INS_LOWOVERHEAD
-        P0 = R0;        /* P0 = port */
-        cli R3;
-        P1 = R1;        /* P1 = address */
-        P2 = R2;        /* P2 = count */
-        SSYNC;
-        LSETUP( .Llong_loop_s, .Llong_loop_e) LC0 = P2;
-.Llong_loop_s:  R0 = [P0];
-                [P1++] = R0;
-                NOP;
-.Llong_loop_e:  NOP;
-        sti R3;
-        RTS;
-#else
-        P0 = R0;        /* P0 = port */
-        P1 = R1;        /* P1 = address */
-        P2 = R2;        /* P2 = count */
-        SSYNC;
-        LSETUP( .Llong_loop_s, .Llong_loop_e) LC0 = P2;
-.Llong_loop_s:
-        CLI R3;
-        NOP; NOP; NOP;
-        R0 = [P0];
-        [P1++] = R0;
-.Llong_loop_e:
-        STI R3;
+#define COMMON_INS(func, ops) \
+ENTRY(_ins##func) \
+        P0 = R0;        /* P0 = port */ \
+        CLI_OUTER;      /* 3 instructions before first read access */ \
+        P1 = R1;        /* P1 = address */ \
+        P2 = R2;        /* P2 = count */ \
+        SSYNC; \
+ \
+        LSETUP(1f, 2f) LC0 = P2; \
+        CLI_INNER; \
+        ops; \
+        STI_INNER; \
+ \
+        STI_OUTER; \
+        RTS; \
+ENDPROC(_ins##func)
 
-        RTS;
-#endif
-ENDPROC(_insl)
-
-ENTRY(_insw)
-#ifdef CONFIG_BFIN_INS_LOWOVERHEAD
-        P0 = R0;        /* P0 = port */
-        cli R3;
-        P1 = R1;        /* P1 = address */
-        P2 = R2;        /* P2 = count */
-        SSYNC;
-        LSETUP( .Lword_loop_s, .Lword_loop_e) LC0 = P2;
-.Lword_loop_s:  R0 = W[P0];
-                W[P1++] = R0;
-                NOP;
-.Lword_loop_e:  NOP;
-        sti R3;
-        RTS;
-#else
-        P0 = R0;        /* P0 = port */
-        P1 = R1;        /* P1 = address */
-        P2 = R2;        /* P2 = count */
-        SSYNC;
-        LSETUP( .Lword_loop_s, .Lword_loop_e) LC0 = P2;
-.Lword_loop_s:
-        CLI R3;
-        NOP; NOP; NOP;
-        R0 = W[P0];
-        W[P1++] = R0;
-.Lword_loop_e:
-        STI R3;
-        RTS;
-
-#endif
-ENDPROC(_insw)
-
-ENTRY(_insw_8)
-#ifdef CONFIG_BFIN_INS_LOWOVERHEAD
-        P0 = R0;        /* P0 = port */
-        cli R3;
-        P1 = R1;        /* P1 = address */
-        P2 = R2;        /* P2 = count */
-        SSYNC;
-        LSETUP( .Lword8_loop_s, .Lword8_loop_e) LC0 = P2;
-.Lword8_loop_s:  R0 = W[P0];
-                B[P1++] = R0;
-                R0 = R0 >> 8;
-                B[P1++] = R0;
-                NOP;
-.Lword8_loop_e: NOP;
-        sti R3;
-        RTS;
-#else
-        P0 = R0;        /* P0 = port */
-        P1 = R1;        /* P1 = address */
-        P2 = R2;        /* P2 = count */
-        SSYNC;
-        LSETUP( .Lword8_loop_s, .Lword8_loop_e) LC0 = P2;
-.Lword8_loop_s:
-        CLI R3;
-        NOP; NOP; NOP;
-        R0 = W[P0];
-        B[P1++] = R0;
-        R0 = R0 >> 8;
-        B[P1++] = R0;
-        NOP;
-.Lword8_loop_e:
-        STI R3;
+COMMON_INS(l, \
+        R0 = [P0]; \
+        [P1++] = R0; \
+)
 
-        RTS;
-#endif
-ENDPROC(_insw_8)
+COMMON_INS(w, \
+        R0 = W[P0]; \
+        W[P1++] = R0; \
+)
 
-ENTRY(_insb)
-#ifdef CONFIG_BFIN_INS_LOWOVERHEAD
-        P0 = R0;        /* P0 = port */
-        cli R3;
-        P1 = R1;        /* P1 = address */
-        P2 = R2;        /* P2 = count */
-        SSYNC;
-        LSETUP( .Lbyte_loop_s, .Lbyte_loop_e) LC0 = P2;
-.Lbyte_loop_s:  R0 = B[P0];
-                B[P1++] = R0;
-                NOP;
-.Lbyte_loop_e:  NOP;
-        sti R3;
-        RTS;
-#else
-        P0 = R0;        /* P0 = port */
-        P1 = R1;        /* P1 = address */
-        P2 = R2;        /* P2 = count */
-        SSYNC;
-        LSETUP( .Lbyte_loop_s, .Lbyte_loop_e) LC0 = P2;
-.Lbyte_loop_s:
-        CLI R3;
-        NOP; NOP; NOP;
-        R0 = B[P0];
-        B[P1++] = R0;
-.Lbyte_loop_e:
-        STI R3;
+COMMON_INS(w_8, \
+        R0 = W[P0]; \
+        B[P1++] = R0; \
+        R0 = R0 >> 8; \
+        B[P1++] = R0; \
+)
 
-        RTS;
-#endif
-ENDPROC(_insb)
+COMMON_INS(b, \
+        R0 = B[P0]; \
+        B[P1++] = R0; \
+)
 
-ENTRY(_insl_16)
-#ifdef CONFIG_BFIN_INS_LOWOVERHEAD
-        P0 = R0;        /* P0 = port */
-        cli R3;
-        P1 = R1;        /* P1 = address */
-        P2 = R2;        /* P2 = count */
-        SSYNC;
-        LSETUP( .Llong16_loop_s, .Llong16_loop_e) LC0 = P2;
-.Llong16_loop_s:  R0 = [P0];
-                  W[P1++] = R0;
-                  R0 = R0 >> 16;
-                  W[P1++] = R0;
-                  NOP;
-.Llong16_loop_e:  NOP;
-        sti R3;
-        RTS;
-#else
-        P0 = R0;        /* P0 = port */
-        P1 = R1;        /* P1 = address */
-        P2 = R2;        /* P2 = count */
-        SSYNC;
-        LSETUP( .Llong16_loop_s, .Llong16_loop_e) LC0 = P2;
-.Llong16_loop_s:
-        CLI R3;
-        NOP; NOP; NOP;
-        R0 = [P0];
-        W[P1++] = R0;
-        R0 = R0 >> 16;
-        W[P1++] = R0;
-.Llong16_loop_e:
-        STI R3;
-        RTS;
-#endif
-ENDPROC(_insl_16)
+COMMON_INS(l_16, \
+        R0 = [P0]; \
+        W[P1++] = R0; \
+        R0 = R0 >> 16; \
+        W[P1++] = R0; \
+)
diff --git a/arch/blackfin/lib/muldi3.S b/arch/blackfin/lib/muldi3.S
new file mode 100644
index 000000000000..abde120ee230
--- /dev/null
+++ b/arch/blackfin/lib/muldi3.S
@@ -0,0 +1,68 @@
+.align 2
+.global ___muldi3;
+.type ___muldi3, STT_FUNC;
+
+#ifdef CONFIG_ARITHMETIC_OPS_L1
+.section .l1.text
+#else
+.text
+#endif
+
+/*
+           R1:R0 * R3:R2
+         = R1.h:R1.l:R0.h:R0.l * R3.h:R3.l:R2.h:R2.l
+[X]      = (R1.h * R3.h) * 2^96
+[X]        + (R1.h * R3.l + R1.l * R3.h) * 2^80
+[X]        + (R1.h * R2.h + R1.l * R3.l + R3.h * R0.h) * 2^64
+[T1]       + (R1.h * R2.l + R3.h * R0.l + R1.l * R2.h + R3.l * R0.h) * 2^48
+[T2]       + (R1.l * R2.l + R3.l * R0.l + R0.h * R2.h) * 2^32
+[T3]       + (R0.l * R2.h + R2.l * R0.h) * 2^16
+[T4]       + (R0.l * R2.l)
+
+        We can discard the first three lines marked "X" since we produce
+        only a 64 bit result.  So, we need ten 16-bit multiplies.
+
+        Individual mul-acc results:
+[E1]     =  R1.h * R2.l + R3.h * R0.l + R1.l * R2.h + R3.l * R0.h
+[E2]     =  R1.l * R2.l + R3.l * R0.l + R0.h * R2.h
+[E3]     =  R0.l * R2.h + R2.l * R0.h
+[E4]     =  R0.l * R2.l
+
+        We also need to add high parts from lower-level results to higher ones:
+        E[n]c = E[n] + (E[n+1]c >> 16), where E4c := E4
+
+        One interesting property is that all parts of the result that depend
+        on the sign of the multiplication are discarded.  Those would be the
+        multiplications involving R1.h and R3.h, but only the top 16 bit of
+        the 32 bit result depend on the sign, and since R1.h and R3.h only
+        occur in E1, the top half of these results is cut off.
+        So, we can just use FU mode for all of the 16-bit multiplies, and
+        ignore questions of when to use mixed mode.  */
+
+___muldi3:
+        /* [SP] technically is part of the caller's frame, but we can
+           use it as scratch space.  */
+        A0 = R2.H * R1.L, A1 = R2.L * R1.H (FU) || R3 = [SP + 12];      /* E1 */
+        A0 += R3.H * R0.L, A1 += R3.L * R0.H (FU) || [SP] = R4;         /* E1 */
+        A0 += A1;                                                       /* E1 */
+        R4 = A0.w;
+        A0 = R0.l * R3.l (FU);                                          /* E2 */
+        A0 += R2.l * R1.l (FU);                                         /* E2 */
+
+        A1 = R2.L * R0.L (FU);                                          /* E4 */
+        R3 = A1.w;
+        A1 = A1 >> 16;                                                  /* E3c */
+        A0 += R2.H * R0.H, A1 += R2.L * R0.H (FU);                      /* E2, E3c */
+        A1 += R0.L * R2.H (FU);                                         /* E3c */
+        R0 = A1.w;
+        A1 = A1 >> 16;                                                  /* E2c */
+        A0 += A1;                                                       /* E2c */
+        R1 = A0.w;
+
+        /* low(result) = low(E3c):low(E4) */
+        R0 = PACK (R0.l, R3.l);
+        /* high(result) = E2c + (E1 << 16) */
+        R1.h = R1.h + R4.l (NS) || R4 = [SP];
+        RTS;
+
+.size ___muldi3, .-___muldi3
diff --git a/arch/blackfin/lib/muldi3.c b/arch/blackfin/lib/muldi3.c
deleted file mode 100644
index 303d0c6a6dba..000000000000
--- a/arch/blackfin/lib/muldi3.c
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * File:         arch/blackfin/lib/muldi3.c
- * Based on:
- * Author:
- *
- * Created:
- * Description:
- *
- * Modified:
- *               Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs:         Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#ifndef SI_TYPE_SIZE
-#define SI_TYPE_SIZE 32
-#endif
-#define __ll_b (1L << (SI_TYPE_SIZE / 2))
-#define __ll_lowpart(t) ((usitype) (t) % __ll_b)
-#define __ll_highpart(t) ((usitype) (t) / __ll_b)
-#define BITS_PER_UNIT 8
-
-#if !defined(umul_ppmm)
-#define umul_ppmm(w1, w0, u, v)                                         \
-  do {                                                                  \
-    usitype __x0, __x1, __x2, __x3;                                     \
-    usitype __ul, __vl, __uh, __vh;                                     \
-                                                                        \
-    __ul = __ll_lowpart (u);                                            \
-    __uh = __ll_highpart (u);                                           \
-    __vl = __ll_lowpart (v);                                            \
-    __vh = __ll_highpart (v);                                           \
-                                                                        \
-    __x0 = (usitype) __ul * __vl;                                       \
-    __x1 = (usitype) __ul * __vh;                                       \
-    __x2 = (usitype) __uh * __vl;                                       \
-    __x3 = (usitype) __uh * __vh;                                       \
-                                                                        \
-    __x1 += __ll_highpart (__x0);/* this can't give carry */            \
-    __x1 += __x2;               /* but this indeed can */               \
-    if (__x1 < __x2)            /* did we get it? */                    \
-      __x3 += __ll_b;           /* yes, add it in the proper pos. */    \
-                                                                        \
-    (w1) = __x3 + __ll_highpart (__x1);                                 \
-    (w0) = __ll_lowpart (__x1) * __ll_b + __ll_lowpart (__x0);          \
-  } while (0)
-#endif
-
-#if !defined(__umulsidi3)
-#define __umulsidi3(u, v)                                               \
-  ({diunion __w;                                                        \
-       umul_ppmm (__w.s.high, __w.s.low, u, v);                         \
-           __w.ll; })
-#endif
-
-typedef unsigned int usitype __attribute__ ((mode(SI)));
-typedef int sitype __attribute__ ((mode(SI)));
-typedef int ditype __attribute__ ((mode(DI)));
-typedef int word_type __attribute__ ((mode(__word__)));
-
-struct distruct {
-        sitype low, high;
-};
-typedef union {
-        struct distruct s;
-        ditype ll;
-} diunion;
-
-#ifdef CONFIG_ARITHMETIC_OPS_L1
-ditype __muldi3(ditype u, ditype v)__attribute__((l1_text));
-#endif
-
-ditype __muldi3(ditype u, ditype v)
-{
-        diunion w;
-        diunion uu, vv;
-
-        uu.ll = u, vv.ll = v;
-        w.ll = __umulsidi3(uu.s.low, vv.s.low);
-        w.s.high += ((usitype) uu.s.low * (usitype) vv.s.high
-                     + (usitype) uu.s.high * (usitype) vv.s.low);
-
-        return w.ll;
-}