Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 788 insertions, 0 deletions

diff --git a/security/nss/lib/freebl/mpi/mpcpucache.c b/security/nss/lib/freebl/mpi/mpcpucache.c
new file mode 100644
index 0000000000..ddc21ec1cb
--- /dev/null
+++ b/security/nss/lib/freebl/mpi/mpcpucache.c
@@ -0,0 +1,788 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mpi.h"
+#include "prtypes.h"
+
+/*
+ * This file implements a single function: s_mpi_getProcessorLineSize();
+ * s_mpi_getProcessorLineSize() returns the size in bytes of the cache line
+ * if a cache exists, or zero if there is no cache. If more than one
+ * cache line exists, it should return the smallest line size (which is
+ * usually the L1 cache).
+ *
+ * mp_modexp uses this information to make sure that private key information
+ * isn't being leaked through the cache.
+ *
+ * Currently the file returns good data for most modern x86 processors, and
+ * reasonable data on 64-bit ppc processors. All other processors are assumed
+ * to have a cache line size of 32 bytes.
+ *
+ */
+
+#if defined(i386) || defined(__i386) || defined(__X86__) || defined(_M_IX86) || defined(__x86_64__) || defined(__x86_64) || defined(_M_AMD64)
+/* X86 processors have special instructions that tell us about the cache */
+#include "string.h"
+
+#if defined(__x86_64__) || defined(__x86_64) || defined(_M_AMD64)
+#define AMD_64 1
+#endif
+
+/* Generic CPUID function */
+#if defined(AMD_64)
+
+#if defined(__GNUC__)
+
+void
+freebl_cpuid(unsigned long op, unsigned long *eax,
+             unsigned long *ebx, unsigned long *ecx,
+             unsigned long *edx)
+{
+    __asm__("xor %%ecx, %%ecx\n\t"
+            "cpuid\n\t"
+            : "=a"(*eax),
+              "=b"(*ebx),
+              "=c"(*ecx),
+              "=d"(*edx)
+            : "0"(op));
+}
+
+#elif defined(_MSC_VER)
+
+#include <intrin.h>
+
+void
+freebl_cpuid(unsigned long op, unsigned long *eax,
+             unsigned long *ebx, unsigned long *ecx,
+             unsigned long *edx)
+{
+    int intrinsic_out[4];
+
+    __cpuid(intrinsic_out, op);
+    *eax = intrinsic_out[0];
+    *ebx = intrinsic_out[1];
+    *ecx = intrinsic_out[2];
+    *edx = intrinsic_out[3];
+}
+
+#endif
+
+#else /* !defined(AMD_64) */
+
+/* x86 */
+
+#if defined(__GNUC__)
+void
+freebl_cpuid(unsigned long op, unsigned long *eax,
+             unsigned long *ebx, unsigned long *ecx,
+             unsigned long *edx)
+{
+    /* Some older processors don't fill the ecx register with cpuid, so clobber it
+     * before calling cpuid, so that there's no risk of picking random bits that
+     * erroneously indicate that absent CPU features are present.
+     * Also, GCC isn't smart enough to save the ebx PIC register on its own
+     * in this case, so do it by hand. Use edi to store ebx and pass the
+     * value returned in ebx from cpuid through edi. */
+    __asm__("xor %%ecx, %%ecx\n\t"
+            "mov %%ebx,%%edi\n\t"
+            "cpuid\n\t"
+            "xchgl %%ebx,%%edi\n\t"
+            : "=a"(*eax),
+              "=D"(*ebx),
+              "=c"(*ecx),
+              "=d"(*edx)
+            : "0"(op));
+}
+
+/*
+ * try flipping a processor flag to determine CPU type
+ */
+static unsigned long
+changeFlag(unsigned long flag)
+{
+    unsigned long changedFlags, originalFlags;
+    __asm__("pushfl\n\t" /* get the flags */
+            "popl %0\n\t"
+            "movl %0,%1\n\t" /* save the original flags */
+            "xorl %2,%0\n\t" /* flip the bit */
+            "pushl %0\n\t"   /* set the flags */
+            "popfl\n\t"
+            "pushfl\n\t" /* get the flags again (for return) */
+            "popl %0\n\t"
+            "pushl %1\n\t" /* restore the original flags */
+            "popfl\n\t"
+            : "=r"(changedFlags),
+              "=r"(originalFlags),
+              "=r"(flag)
+            : "2"(flag));
+    return changedFlags ^ originalFlags;
+}
+
+#elif defined(_MSC_VER)
+
+/*
+ * windows versions of the above assembler
+ */
+#define wcpuid __asm __emit 0fh __asm __emit 0a2h
+void
+freebl_cpuid(unsigned long op, unsigned long *Reax,
+             unsigned long *Rebx, unsigned long *Recx, unsigned long *Redx)
+{
+    unsigned long Leax, Lebx, Lecx, Ledx;
+    __asm {
+        pushad
+        xor     ecx,ecx
+        mov     eax,op
+        wcpuid
+        mov     Leax,eax
+        mov     Lebx,ebx
+        mov     Lecx,ecx
+        mov     Ledx,edx
+        popad
+    }
+    *Reax = Leax;
+    *Rebx = Lebx;
+    *Recx = Lecx;
+    *Redx = Ledx;
+}
+
+static unsigned long
+changeFlag(unsigned long flag)
+{
+    unsigned long changedFlags, originalFlags;
+    __asm {
+        push eax
+        push ebx
+        pushfd /* get the flags */
+            pop  eax
+        push eax /* save the flags on the stack */
+            mov  originalFlags,eax /* save the original flags */
+        mov  ebx,flag
+            xor  eax,ebx /* flip the bit */
+        push eax /* set the flags */
+            popfd
+        pushfd /* get the flags again (for return) */
+        pop  eax
+        popfd /* restore the original flags */
+        mov changedFlags,eax
+        pop ebx
+        pop eax
+    }
+    return changedFlags ^ originalFlags;
+}
+#endif
+
+#endif
+
+#if !defined(AMD_64)
+#define AC_FLAG 0x40000
+#define ID_FLAG 0x200000
+
+/* 386 processors can't flip the AC_FLAG, intel AP Note AP-485 */
+static int
+is386()
+{
+    return changeFlag(AC_FLAG) == 0;
+}
+
+/* 486 processors can't flip the ID_FLAG, intel AP Note AP-485 */
+static int
+is486()
+{
+    return changeFlag(ID_FLAG) == 0;
+}
+#endif
+
+/*
+ * table for Intel Cache.
+ * See Intel Application Note AP-485 for more information
+ */
+
+typedef unsigned char CacheTypeEntry;
+
+typedef enum {
+    Cache_NONE = 0,
+    Cache_UNKNOWN = 1,
+    Cache_TLB = 2,
+    Cache_TLBi = 3,
+    Cache_TLBd = 4,
+    Cache_Trace = 5,
+    Cache_L1 = 6,
+    Cache_L1i = 7,
+    Cache_L1d = 8,
+    Cache_L2 = 9,
+    Cache_L2i = 10,
+    Cache_L2d = 11,
+    Cache_L3 = 12,
+    Cache_L3i = 13,
+    Cache_L3d = 14
+} CacheType;
+
+struct _cache {
+    CacheTypeEntry type;
+    unsigned char lineSize;
+};
+static const struct _cache CacheMap[256] = {
+    /* 00 */ { Cache_NONE, 0 },
+    /* 01 */ { Cache_TLBi, 0 },
+    /* 02 */ { Cache_TLBi, 0 },
+    /* 03 */ { Cache_TLBd, 0 },
+    /* 04 */ {
+        Cache_TLBd,
+    },
+    /* 05 */ { Cache_UNKNOWN, 0 },
+    /* 06 */ { Cache_L1i, 32 },
+    /* 07 */ { Cache_UNKNOWN, 0 },
+    /* 08 */ { Cache_L1i, 32 },
+    /* 09 */ { Cache_UNKNOWN, 0 },
+    /* 0a */ { Cache_L1d, 32 },
+    /* 0b */ { Cache_UNKNOWN, 0 },
+    /* 0c */ { Cache_L1d, 32 },
+    /* 0d */ { Cache_UNKNOWN, 0 },
+    /* 0e */ { Cache_UNKNOWN, 0 },
+    /* 0f */ { Cache_UNKNOWN, 0 },
+    /* 10 */ { Cache_UNKNOWN, 0 },
+    /* 11 */ { Cache_UNKNOWN, 0 },
+    /* 12 */ { Cache_UNKNOWN, 0 },
+    /* 13 */ { Cache_UNKNOWN, 0 },
+    /* 14 */ { Cache_UNKNOWN, 0 },
+    /* 15 */ { Cache_UNKNOWN, 0 },
+    /* 16 */ { Cache_UNKNOWN, 0 },
+    /* 17 */ { Cache_UNKNOWN, 0 },
+    /* 18 */ { Cache_UNKNOWN, 0 },
+    /* 19 */ { Cache_UNKNOWN, 0 },
+    /* 1a */ { Cache_UNKNOWN, 0 },
+    /* 1b */ { Cache_UNKNOWN, 0 },
+    /* 1c */ { Cache_UNKNOWN, 0 },
+    /* 1d */ { Cache_UNKNOWN, 0 },
+    /* 1e */ { Cache_UNKNOWN, 0 },
+    /* 1f */ { Cache_UNKNOWN, 0 },
+    /* 20 */ { Cache_UNKNOWN, 0 },
+    /* 21 */ { Cache_UNKNOWN, 0 },
+    /* 22 */ { Cache_L3, 64 },
+    /* 23 */ { Cache_L3, 64 },
+    /* 24 */ { Cache_UNKNOWN, 0 },
+    /* 25 */ { Cache_L3, 64 },
+    /* 26 */ { Cache_UNKNOWN, 0 },
+    /* 27 */ { Cache_UNKNOWN, 0 },
+    /* 28 */ { Cache_UNKNOWN, 0 },
+    /* 29 */ { Cache_L3, 64 },
+    /* 2a */ { Cache_UNKNOWN, 0 },
+    /* 2b */ { Cache_UNKNOWN, 0 },
+    /* 2c */ { Cache_L1d, 64 },
+    /* 2d */ { Cache_UNKNOWN, 0 },
+    /* 2e */ { Cache_UNKNOWN, 0 },
+    /* 2f */ { Cache_UNKNOWN, 0 },
+    /* 30 */ { Cache_L1i, 64 },
+    /* 31 */ { Cache_UNKNOWN, 0 },
+    /* 32 */ { Cache_UNKNOWN, 0 },
+    /* 33 */ { Cache_UNKNOWN, 0 },
+    /* 34 */ { Cache_UNKNOWN, 0 },
+    /* 35 */ { Cache_UNKNOWN, 0 },
+    /* 36 */ { Cache_UNKNOWN, 0 },
+    /* 37 */ { Cache_UNKNOWN, 0 },
+    /* 38 */ { Cache_UNKNOWN, 0 },
+    /* 39 */ { Cache_L2, 64 },
+    /* 3a */ { Cache_UNKNOWN, 0 },
+    /* 3b */ { Cache_L2, 64 },
+    /* 3c */ { Cache_L2, 64 },
+    /* 3d */ { Cache_UNKNOWN, 0 },
+    /* 3e */ { Cache_UNKNOWN, 0 },
+    /* 3f */ { Cache_UNKNOWN, 0 },
+    /* 40 */ { Cache_L2, 0 },
+    /* 41 */ { Cache_L2, 32 },
+    /* 42 */ { Cache_L2, 32 },
+    /* 43 */ { Cache_L2, 32 },
+    /* 44 */ { Cache_L2, 32 },
+    /* 45 */ { Cache_L2, 32 },
+    /* 46 */ { Cache_UNKNOWN, 0 },
+    /* 47 */ { Cache_UNKNOWN, 0 },
+    /* 48 */ { Cache_UNKNOWN, 0 },
+    /* 49 */ { Cache_UNKNOWN, 0 },
+    /* 4a */ { Cache_UNKNOWN, 0 },
+    /* 4b */ { Cache_UNKNOWN, 0 },
+    /* 4c */ { Cache_UNKNOWN, 0 },
+    /* 4d */ { Cache_UNKNOWN, 0 },
+    /* 4e */ { Cache_UNKNOWN, 0 },
+    /* 4f */ { Cache_UNKNOWN, 0 },
+    /* 50 */ { Cache_TLBi, 0 },
+    /* 51 */ { Cache_TLBi, 0 },
+    /* 52 */ { Cache_TLBi, 0 },
+    /* 53 */ { Cache_UNKNOWN, 0 },
+    /* 54 */ { Cache_UNKNOWN, 0 },
+    /* 55 */ { Cache_UNKNOWN, 0 },
+    /* 56 */ { Cache_UNKNOWN, 0 },
+    /* 57 */ { Cache_UNKNOWN, 0 },
+    /* 58 */ { Cache_UNKNOWN, 0 },
+    /* 59 */ { Cache_UNKNOWN, 0 },
+    /* 5a */ { Cache_UNKNOWN, 0 },
+    /* 5b */ { Cache_TLBd, 0 },
+    /* 5c */ { Cache_TLBd, 0 },
+    /* 5d */ { Cache_TLBd, 0 },
+    /* 5e */ { Cache_UNKNOWN, 0 },
+    /* 5f */ { Cache_UNKNOWN, 0 },
+    /* 60 */ { Cache_UNKNOWN, 0 },
+    /* 61 */ { Cache_UNKNOWN, 0 },
+    /* 62 */ { Cache_UNKNOWN, 0 },
+    /* 63 */ { Cache_UNKNOWN, 0 },
+    /* 64 */ { Cache_UNKNOWN, 0 },
+    /* 65 */ { Cache_UNKNOWN, 0 },
+    /* 66 */ { Cache_L1d, 64 },
+    /* 67 */ { Cache_L1d, 64 },
+    /* 68 */ { Cache_L1d, 64 },
+    /* 69 */ { Cache_UNKNOWN, 0 },
+    /* 6a */ { Cache_UNKNOWN, 0 },
+    /* 6b */ { Cache_UNKNOWN, 0 },
+    /* 6c */ { Cache_UNKNOWN, 0 },
+    /* 6d */ { Cache_UNKNOWN, 0 },
+    /* 6e */ { Cache_UNKNOWN, 0 },
+    /* 6f */ { Cache_UNKNOWN, 0 },
+    /* 70 */ { Cache_Trace, 1 },
+    /* 71 */ { Cache_Trace, 1 },
+    /* 72 */ { Cache_Trace, 1 },
+    /* 73 */ { Cache_UNKNOWN, 0 },
+    /* 74 */ { Cache_UNKNOWN, 0 },
+    /* 75 */ { Cache_UNKNOWN, 0 },
+    /* 76 */ { Cache_UNKNOWN, 0 },
+    /* 77 */ { Cache_UNKNOWN, 0 },
+    /* 78 */ { Cache_UNKNOWN, 0 },
+    /* 79 */ { Cache_L2, 64 },
+    /* 7a */ { Cache_L2, 64 },
+    /* 7b */ { Cache_L2, 64 },
+    /* 7c */ { Cache_L2, 64 },
+    /* 7d */ { Cache_UNKNOWN, 0 },
+    /* 7e */ { Cache_UNKNOWN, 0 },
+    /* 7f */ { Cache_UNKNOWN, 0 },
+    /* 80 */ { Cache_UNKNOWN, 0 },
+    /* 81 */ { Cache_UNKNOWN, 0 },
+    /* 82 */ { Cache_L2, 32 },
+    /* 83 */ { Cache_L2, 32 },
+    /* 84 */ { Cache_L2, 32 },
+    /* 85 */ { Cache_L2, 32 },
+    /* 86 */ { Cache_L2, 64 },
+    /* 87 */ { Cache_L2, 64 },
+    /* 88 */ { Cache_UNKNOWN, 0 },
+    /* 89 */ { Cache_UNKNOWN, 0 },
+    /* 8a */ { Cache_UNKNOWN, 0 },
+    /* 8b */ { Cache_UNKNOWN, 0 },
+    /* 8c */ { Cache_UNKNOWN, 0 },
+    /* 8d */ { Cache_UNKNOWN, 0 },
+    /* 8e */ { Cache_UNKNOWN, 0 },
+    /* 8f */ { Cache_UNKNOWN, 0 },
+    /* 90 */ { Cache_UNKNOWN, 0 },
+    /* 91 */ { Cache_UNKNOWN, 0 },
+    /* 92 */ { Cache_UNKNOWN, 0 },
+    /* 93 */ { Cache_UNKNOWN, 0 },
+    /* 94 */ { Cache_UNKNOWN, 0 },
+    /* 95 */ { Cache_UNKNOWN, 0 },
+    /* 96 */ { Cache_UNKNOWN, 0 },
+    /* 97 */ { Cache_UNKNOWN, 0 },
+    /* 98 */ { Cache_UNKNOWN, 0 },
+    /* 99 */ { Cache_UNKNOWN, 0 },
+    /* 9a */ { Cache_UNKNOWN, 0 },
+    /* 9b */ { Cache_UNKNOWN, 0 },
+    /* 9c */ { Cache_UNKNOWN, 0 },
+    /* 9d */ { Cache_UNKNOWN, 0 },
+    /* 9e */ { Cache_UNKNOWN, 0 },
+    /* 9f */ { Cache_UNKNOWN, 0 },
+    /* a0 */ { Cache_UNKNOWN, 0 },
+    /* a1 */ { Cache_UNKNOWN, 0 },
+    /* a2 */ { Cache_UNKNOWN, 0 },
+    /* a3 */ { Cache_UNKNOWN, 0 },
+    /* a4 */ { Cache_UNKNOWN, 0 },
+    /* a5 */ { Cache_UNKNOWN, 0 },
+    /* a6 */ { Cache_UNKNOWN, 0 },
+    /* a7 */ { Cache_UNKNOWN, 0 },
+    /* a8 */ { Cache_UNKNOWN, 0 },
+    /* a9 */ { Cache_UNKNOWN, 0 },
+    /* aa */ { Cache_UNKNOWN, 0 },
+    /* ab */ { Cache_UNKNOWN, 0 },
+    /* ac */ { Cache_UNKNOWN, 0 },
+    /* ad */ { Cache_UNKNOWN, 0 },
+    /* ae */ { Cache_UNKNOWN, 0 },
+    /* af */ { Cache_UNKNOWN, 0 },
+    /* b0 */ { Cache_TLBi, 0 },
+    /* b1 */ { Cache_UNKNOWN, 0 },
+    /* b2 */ { Cache_UNKNOWN, 0 },
+    /* b3 */ { Cache_TLBd, 0 },
+    /* b4 */ { Cache_UNKNOWN, 0 },
+    /* b5 */ { Cache_UNKNOWN, 0 },
+    /* b6 */ { Cache_UNKNOWN, 0 },
+    /* b7 */ { Cache_UNKNOWN, 0 },
+    /* b8 */ { Cache_UNKNOWN, 0 },
+    /* b9 */ { Cache_UNKNOWN, 0 },
+    /* ba */ { Cache_UNKNOWN, 0 },
+    /* bb */ { Cache_UNKNOWN, 0 },
+    /* bc */ { Cache_UNKNOWN, 0 },
+    /* bd */ { Cache_UNKNOWN, 0 },
+    /* be */ { Cache_UNKNOWN, 0 },
+    /* bf */ { Cache_UNKNOWN, 0 },
+    /* c0 */ { Cache_UNKNOWN, 0 },
+    /* c1 */ { Cache_UNKNOWN, 0 },
+    /* c2 */ { Cache_UNKNOWN, 0 },
+    /* c3 */ { Cache_UNKNOWN, 0 },
+    /* c4 */ { Cache_UNKNOWN, 0 },
+    /* c5 */ { Cache_UNKNOWN, 0 },
+    /* c6 */ { Cache_UNKNOWN, 0 },
+    /* c7 */ { Cache_UNKNOWN, 0 },
+    /* c8 */ { Cache_UNKNOWN, 0 },
+    /* c9 */ { Cache_UNKNOWN, 0 },
+    /* ca */ { Cache_UNKNOWN, 0 },
+    /* cb */ { Cache_UNKNOWN, 0 },
+    /* cc */ { Cache_UNKNOWN, 0 },
+    /* cd */ { Cache_UNKNOWN, 0 },
+    /* ce */ { Cache_UNKNOWN, 0 },
+    /* cf */ { Cache_UNKNOWN, 0 },
+    /* d0 */ { Cache_UNKNOWN, 0 },
+    /* d1 */ { Cache_UNKNOWN, 0 },
+    /* d2 */ { Cache_UNKNOWN, 0 },
+    /* d3 */ { Cache_UNKNOWN, 0 },
+    /* d4 */ { Cache_UNKNOWN, 0 },
+    /* d5 */ { Cache_UNKNOWN, 0 },
+    /* d6 */ { Cache_UNKNOWN, 0 },
+    /* d7 */ { Cache_UNKNOWN, 0 },
+    /* d8 */ { Cache_UNKNOWN, 0 },
+    /* d9 */ { Cache_UNKNOWN, 0 },
+    /* da */ { Cache_UNKNOWN, 0 },
+    /* db */ { Cache_UNKNOWN, 0 },
+    /* dc */ { Cache_UNKNOWN, 0 },
+    /* dd */ { Cache_UNKNOWN, 0 },
+    /* de */ { Cache_UNKNOWN, 0 },
+    /* df */ { Cache_UNKNOWN, 0 },
+    /* e0 */ { Cache_UNKNOWN, 0 },
+    /* e1 */ { Cache_UNKNOWN, 0 },
+    /* e2 */ { Cache_UNKNOWN, 0 },
+    /* e3 */ { Cache_UNKNOWN, 0 },
+    /* e4 */ { Cache_UNKNOWN, 0 },
+    /* e5 */ { Cache_UNKNOWN, 0 },
+    /* e6 */ { Cache_UNKNOWN, 0 },
+    /* e7 */ { Cache_UNKNOWN, 0 },
+    /* e8 */ { Cache_UNKNOWN, 0 },
+    /* e9 */ { Cache_UNKNOWN, 0 },
+    /* ea */ { Cache_UNKNOWN, 0 },
+    /* eb */ { Cache_UNKNOWN, 0 },
+    /* ec */ { Cache_UNKNOWN, 0 },
+    /* ed */ { Cache_UNKNOWN, 0 },
+    /* ee */ { Cache_UNKNOWN, 0 },
+    /* ef */ { Cache_UNKNOWN, 0 },
+    /* f0 */ { Cache_UNKNOWN, 0 },
+    /* f1 */ { Cache_UNKNOWN, 0 },
+    /* f2 */ { Cache_UNKNOWN, 0 },
+    /* f3 */ { Cache_UNKNOWN, 0 },
+    /* f4 */ { Cache_UNKNOWN, 0 },
+    /* f5 */ { Cache_UNKNOWN, 0 },
+    /* f6 */ { Cache_UNKNOWN, 0 },
+    /* f7 */ { Cache_UNKNOWN, 0 },
+    /* f8 */ { Cache_UNKNOWN, 0 },
+    /* f9 */ { Cache_UNKNOWN, 0 },
+    /* fa */ { Cache_UNKNOWN, 0 },
+    /* fb */ { Cache_UNKNOWN, 0 },
+    /* fc */ { Cache_UNKNOWN, 0 },
+    /* fd */ { Cache_UNKNOWN, 0 },
+    /* fe */ { Cache_UNKNOWN, 0 },
+    /* ff */ { Cache_UNKNOWN, 0 }
+};
+
+/*
+ * use the above table to determine the CacheEntryLineSize.
+ */
+static void
+getIntelCacheEntryLineSize(unsigned long val, int *level,
+                           unsigned long *lineSize)
+{
+    CacheType type;
+
+    type = CacheMap[val].type;
+    /* only interested in data caches */
+    /* NOTE val = 0x40 is a special value that means no L2 or L3 cache.
+     * this data check has the side effect of rejecting that entry. If
+     * that wasn't the case, we could have to reject it explicitly */
+    if (CacheMap[val].lineSize == 0) {
+        return;
+    }
+    /* look at the caches, skip types we aren't interested in.
+     * if we already have a value for a lower level cache, skip the
+     * current entry */
+    if ((type == Cache_L1) || (type == Cache_L1d)) {
+        *level = 1;
+        *lineSize = CacheMap[val].lineSize;
+    } else if ((*level >= 2) && ((type == Cache_L2) || (type == Cache_L2d))) {
+        *level = 2;
+        *lineSize = CacheMap[val].lineSize;
+    } else if ((*level >= 3) && ((type == Cache_L3) || (type == Cache_L3d))) {
+        *level = 3;
+        *lineSize = CacheMap[val].lineSize;
+    }
+    return;
+}
+
+static void
+getIntelRegisterCacheLineSize(unsigned long val,
+                              int *level, unsigned long *lineSize)
+{
+    getIntelCacheEntryLineSize(val >> 24 & 0xff, level, lineSize);
+    getIntelCacheEntryLineSize(val >> 16 & 0xff, level, lineSize);
+    getIntelCacheEntryLineSize(val >> 8 & 0xff, level, lineSize);
+    getIntelCacheEntryLineSize(val & 0xff, level, lineSize);
+}
+
+/*
+ * returns '0' if no recognized cache is found, or if the cache
+ * information is supported by this processor
+ */
+static unsigned long
+getIntelCacheLineSize(int cpuidLevel)
+{
+    int level = 4;
+    unsigned long lineSize = 0;
+    unsigned long eax, ebx, ecx, edx;
+    int repeat, count;
+
+    if (cpuidLevel < 2) {
+        return 0;
+    }
+
+    /* command '2' of the cpuid is intel's cache info call. Each byte of the
+     * 4 registers contain a potential descriptor for the cache. The CacheMap
+     * table maps the cache entry with the processor cache. Register 'al'
+     * contains a count value that cpuid '2' needs to be called in order to
+     * find all the cache descriptors. Only registers with the high bit set
+     * to 'zero' have valid descriptors. This code loops through all the
+     * required calls to cpuid '2' and passes any valid descriptors it finds
+     * to the getIntelRegisterCacheLineSize code, which breaks the registers
+     * down into their component descriptors. In the end the lineSize of the
+     * lowest level cache data cache is returned. */
+    freebl_cpuid(2, &eax, &ebx, &ecx, &edx);
+    repeat = eax & 0xf;
+    for (count = 0; count < repeat; count++) {
+        if ((eax & 0x80000000) == 0) {
+            getIntelRegisterCacheLineSize(eax & 0xffffff00, &level, &lineSize);
+        }
+        if ((ebx & 0x80000000) == 0) {
+            getIntelRegisterCacheLineSize(ebx, &level, &lineSize);
+        }
+        if ((ecx & 0x80000000) == 0) {
+            getIntelRegisterCacheLineSize(ecx, &level, &lineSize);
+        }
+        if ((edx & 0x80000000) == 0) {
+            getIntelRegisterCacheLineSize(edx, &level, &lineSize);
+        }
+        if (count + 1 != repeat) {
+            freebl_cpuid(2, &eax, &ebx, &ecx, &edx);
+        }
+    }
+    return lineSize;
+}
+
+/*
+ * returns '0' if the cache info is not supported by this processor.
+ * This is based on the AMD extended cache commands for cpuid.
+ * (see "AMD Processor Recognition Application Note" Publication 20734).
+ * Some other processors use the identical scheme.
+ * (see "Processor Recognition, Transmeta Corporation").
+ */
+static unsigned long
+getOtherCacheLineSize(unsigned long cpuidLevel)
+{
+    unsigned long lineSize = 0;
+    unsigned long eax, ebx, ecx, edx;
+
+    /* get the Extended CPUID level */
+    freebl_cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
+    cpuidLevel = eax;
+
+    if (cpuidLevel >= 0x80000005) {
+        freebl_cpuid(0x80000005, &eax, &ebx, &ecx, &edx);
+        lineSize = ecx & 0xff; /* line Size, L1 Data Cache */
+    }
+    return lineSize;
+}
+
+static const char *const manMap[] = {
+#define INTEL 0
+    "GenuineIntel",
+#define AMD 1
+    "AuthenticAMD",
+#define CYRIX 2
+    "CyrixInstead",
+#define CENTAUR 2
+    "CentaurHauls",
+#define NEXGEN 3
+    "NexGenDriven",
+#define TRANSMETA 4
+    "GenuineTMx86",
+#define RISE 5
+    "RiseRiseRise",
+#define UMC 6
+    "UMC UMC UMC ",
+#define SIS 7
+    "Sis Sis Sis ",
+#define NATIONAL 8
+    "Geode by NSC",
+};
+
+static const int n_manufacturers = sizeof(manMap) / sizeof(manMap[0]);
+
+#define MAN_UNKNOWN 9
+
+#if !defined(AMD_64)
+#define SSE2_FLAG (1 << 26)
+unsigned long
+s_mpi_is_sse2()
+{
+    unsigned long eax, ebx, ecx, edx;
+
+    if (is386() || is486()) {
+        return 0;
+    }
+    freebl_cpuid(0, &eax, &ebx, &ecx, &edx);
+
+    /* has no SSE2 extensions */
+    if (eax == 0) {
+        return 0;
+    }
+
+    freebl_cpuid(1, &eax, &ebx, &ecx, &edx);
+    return (edx & SSE2_FLAG) == SSE2_FLAG;
+}
+#endif
+
+unsigned long
+s_mpi_getProcessorLineSize()
+{
+    unsigned long eax, ebx, ecx, edx;
+    PRUint32 cpuid[3];
+    unsigned long cpuidLevel;
+    unsigned long cacheLineSize = 0;
+    int manufacturer = MAN_UNKNOWN;
+    int i;
+    char string[13];
+
+#if !defined(AMD_64)
+    if (is386()) {
+        return 0; /* 386 had no cache */
+    }
+    if (is486()) {
+        return 32; /* really? need more info */
+    }
+#endif
+
+    /* Pentium, cpuid command is available */
+    freebl_cpuid(0, &eax, &ebx, &ecx, &edx);
+    cpuidLevel = eax;
+    /* string holds the CPU's manufacturer ID string - a twelve
+     * character ASCII string stored in ebx, edx, ecx, and
+     * the 32-bit extended feature flags are in edx, ecx.
+     */
+    cpuid[0] = ebx;
+    cpuid[1] = ecx;
+    cpuid[2] = edx;
+    memcpy(string, cpuid, sizeof(cpuid));
+    string[12] = 0;
+
+    manufacturer = MAN_UNKNOWN;
+    for (i = 0; i < n_manufacturers; i++) {
+        if (strcmp(manMap[i], string) == 0) {
+            manufacturer = i;
+        }
+    }
+
+    if (manufacturer == INTEL) {
+        cacheLineSize = getIntelCacheLineSize(cpuidLevel);
+    } else {
+        cacheLineSize = getOtherCacheLineSize(cpuidLevel);
+    }
+    /* doesn't support cache info based on cpuid. This means
+     * an old pentium class processor, which have cache lines of
+     * 32. If we learn differently, we can use a switch based on
+     * the Manufacturer id  */
+    if (cacheLineSize == 0) {
+        cacheLineSize = 32;
+    }
+    return cacheLineSize;
+}
+#define MPI_GET_PROCESSOR_LINE_SIZE_DEFINED 1
+#endif
+
+#if defined(__ppc64__)
+/*
+ *  Sigh, The PPC has some really nice features to help us determine cache
+ *  size, since it had lots of direct control functions to do so. The POWER
+ *  processor even has an instruction to do this, but it was dropped in
+ *  PowerPC. Unfortunately most of them are not available in user mode.
+ *
+ *  The dcbz function would be a great way to determine cache line size except
+ *  1) it only works on write-back memory (it throws an exception otherwise),
+ *  and 2) because so many mac programs 'knew' the processor cache size was
+ *  32 bytes, they used this instruction as a fast 'zero 32 bytes'. Now the new
+ *  G5 processor has 128 byte cache, but dcbz only clears 32 bytes to keep
+ *  these programs happy. dcbzl work if 64 bit instructions are supported.
+ *  If you know 64 bit instructions are supported, and that stack is
+ *  write-back, you can use this code.
+ */
+#include "memory.h"
+
+/* clear the cache line that contains 'array' */
+static inline void
+dcbzl(char *array)
+{
+    __asm__("dcbzl %0, %1"
+            : /*no result*/
+            : "b%"(array), "r"(0)
+            : "memory");
+}
+
+#define PPC_DO_ALIGN(x, y) ((char *)((((long long)(x)) + ((y)-1)) & ~((y)-1)))
+
+#define PPC_MAX_LINE_SIZE 256
+unsigned long
+s_mpi_getProcessorLineSize()
+{
+    char testArray[2 * PPC_MAX_LINE_SIZE + 1];
+    char *test;
+    int i;
+
+    /* align the array on a maximum line size boundary, so we
+     * know we are starting to clear from the first address */
+    test = PPC_DO_ALIGN(testArray, PPC_MAX_LINE_SIZE);
+    /* set all the values to 1's */
+    memset(test, 0xff, PPC_MAX_LINE_SIZE);
+    /* clear one cache block starting at 'test' */
+    dcbzl(test);
+
+    /* find the size of the cleared area, that's our block size */
+    for (i = PPC_MAX_LINE_SIZE; i != 0; i = i / 2) {
+        if (test[i - 1] == 0) {
+            return i;
+        }
+    }
+    return 0;
+}
+
+#define MPI_GET_PROCESSOR_LINE_SIZE_DEFINED 1
+#endif
+
+/*
+ * put other processor and platform specific cache code here
+ * return the smallest cache line size in bytes on the processor
+ * (usually the L1 cache). If the OS has a call, this would be
+ * a greate place to put it.
+ *
+ * If there is no cache, return 0;
+ *
+ * define MPI_GET_PROCESSOR_LINE_SIZE_DEFINED so the generic functions
+ * below aren't compiled.
+ *
+ */
+
+/* If no way to get the processor cache line size has been defined, assume
+ * it's 32 bytes (most common value, does not significantly impact performance)
+ */
+#ifndef MPI_GET_PROCESSOR_LINE_SIZE_DEFINED
+unsigned long
+s_mpi_getProcessorLineSize()
+{
+    return 32;
+}
+#endif