Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 251 insertions, 0 deletions

diff --git a/qemu/roms/seabios/src/string.c b/qemu/roms/seabios/src/string.c
new file mode 100644
index 000000000..2e4e43746
--- /dev/null
+++ b/qemu/roms/seabios/src/string.c
@@ -0,0 +1,251 @@
+// String manipulation functions.
+//
+// Copyright (C) 2008-2013  Kevin O'Connor <kevin@koconnor.net>
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
+#include "stacks.h" // yield
+#include "string.h" // memcpy
+#include "farptr.h" // SET_SEG
+
+
+/****************************************************************
+ * String ops
+ ****************************************************************/
+
+// Sum the bytes in the specified area.
+u8
+checksum_far(u16 buf_seg, void *buf_far, u32 len)
+{
+    SET_SEG(ES, buf_seg);
+    u32 i;
+    u8 sum = 0;
+    for (i=0; i<len; i++)
+        sum += GET_VAR(ES, ((u8*)buf_far)[i]);
+    return sum;
+}
+
+u8
+checksum(void *buf, u32 len)
+{
+    return checksum_far(GET_SEG(SS), buf, len);
+}
+
+size_t
+strlen(const char *s)
+{
+    if (__builtin_constant_p(s))
+        return __builtin_strlen(s);
+    const char *p = s;
+    while (*p)
+        p++;
+    return p-s;
+}
+
+int
+memcmp_far(u16 s1seg, const void *s1, u16 s2seg, const void *s2, size_t n)
+{
+    while (n--) {
+        int d = GET_FARVAR(s1seg, *(u8*)s1) - GET_FARVAR(s2seg, *(u8*)s2);
+        if (d)
+            return d < 0 ? -1 : 1;
+        s1++;
+        s2++;
+    }
+    return 0;
+}
+
+// Compare two areas of memory.
+int
+memcmp(const void *s1, const void *s2, size_t n)
+{
+    while (n) {
+        if (*(u8*)s1 != *(u8*)s2)
+            return *(u8*)s1 < *(u8*)s2 ? -1 : 1;
+        s1++;
+        s2++;
+        n--;
+    }
+    return 0;
+}
+
+// Compare two strings.
+int
+strcmp(const char *s1, const char *s2)
+{
+    for (;;) {
+        if (*s1 != *s2)
+            return *s1 < *s2 ? -1 : 1;
+        if (! *s1)
+            return 0;
+        s1++;
+        s2++;
+    }
+}
+
+inline void
+memset_far(u16 d_seg, void *d_far, u8 c, size_t len)
+{
+    SET_SEG(ES, d_seg);
+    asm volatile(
+        "rep stosb %%es:(%%di)"
+        : "+c"(len), "+D"(d_far)
+        : "a"(c), "m" (__segment_ES)
+        : "cc", "memory");
+}
+
+inline void
+memset16_far(u16 d_seg, void *d_far, u16 c, size_t len)
+{
+    len /= 2;
+    SET_SEG(ES, d_seg);
+    asm volatile(
+        "rep stosw %%es:(%%di)"
+        : "+c"(len), "+D"(d_far)
+        : "a"(c), "m" (__segment_ES)
+        : "cc", "memory");
+}
+
+void *
+memset(void *s, int c, size_t n)
+{
+    while (n)
+        ((char *)s)[--n] = c;
+    return s;
+}
+
+void memset_fl(void *ptr, u8 val, size_t size)
+{
+    if (MODESEGMENT)
+        memset_far(FLATPTR_TO_SEG(ptr), (void*)(FLATPTR_TO_OFFSET(ptr)),
+                   val, size);
+    else
+        memset(ptr, val, size);
+}
+
+inline void
+memcpy_far(u16 d_seg, void *d_far, u16 s_seg, const void *s_far, size_t len)
+{
+    SET_SEG(ES, d_seg);
+    u16 bkup_ds;
+    asm volatile(
+        "movw %%ds, %w0\n"
+        "movw %w4, %%ds\n"
+        "rep movsb (%%si),%%es:(%%di)\n"
+        "movw %w0, %%ds"
+        : "=&r"(bkup_ds), "+c"(len), "+S"(s_far), "+D"(d_far)
+        : "r"(s_seg), "m" (__segment_ES)
+        : "cc", "memory");
+}
+
+inline void
+memcpy_fl(void *d_fl, const void *s_fl, size_t len)
+{
+    if (MODESEGMENT)
+        memcpy_far(FLATPTR_TO_SEG(d_fl), (void*)FLATPTR_TO_OFFSET(d_fl)
+                   , FLATPTR_TO_SEG(s_fl), (void*)FLATPTR_TO_OFFSET(s_fl)
+                   , len);
+    else
+        memcpy(d_fl, s_fl, len);
+}
+
+void *
+#undef memcpy
+memcpy(void *d1, const void *s1, size_t len)
+#if MODESEGMENT == 0
+#define memcpy __builtin_memcpy
+#endif
+{
+    SET_SEG(ES, GET_SEG(SS));
+    void *d = d1;
+    if (((u32)d1 | (u32)s1 | len) & 3) {
+        // non-aligned memcpy
+        asm volatile(
+            "rep movsb (%%esi),%%es:(%%edi)"
+            : "+c"(len), "+S"(s1), "+D"(d)
+            : "m" (__segment_ES) : "cc", "memory");
+        return d1;
+    }
+    // Common case - use 4-byte copy
+    len /= 4;
+    asm volatile(
+        "rep movsl (%%esi),%%es:(%%edi)"
+        : "+c"(len), "+S"(s1), "+D"(d)
+        : "m" (__segment_ES) : "cc", "memory");
+    return d1;
+}
+
+// Copy to/from memory mapped IO.  IO mem is very slow, so yield
+// periodically.
+void
+iomemcpy(void *d, const void *s, u32 len)
+{
+    ASSERT32FLAT();
+    yield();
+    while (len > 3) {
+        u32 copylen = len;
+        if (copylen > 2048)
+            copylen = 2048;
+        copylen /= 4;
+        len -= copylen * 4;
+        asm volatile(
+            "rep movsl (%%esi),%%es:(%%edi)"
+            : "+c"(copylen), "+S"(s), "+D"(d)
+            : : "cc", "memory");
+        yield();
+    }
+    if (len)
+        // Copy any remaining bytes.
+        memcpy(d, s, len);
+}
+
+void *
+memmove(void *d, const void *s, size_t len)
+{
+    if (s >= d)
+        return memcpy(d, s, len);
+
+    d += len-1;
+    s += len-1;
+    while (len--) {
+        *(char*)d = *(char*)s;
+        d--;
+        s--;
+    }
+
+    return d;
+}
+
+// Copy a string - truncating it if necessary.
+char *
+strtcpy(char *dest, const char *src, size_t len)
+{
+    char *d = dest;
+    while (--len && *src != '\0')
+        *d++ = *src++;
+    *d = '\0';
+    return dest;
+}
+
+// locate first occurance of character c in the string s
+char *
+strchr(const char *s, int c)
+{
+    for (; *s; s++)
+        if (*s == c)
+            return (char*)s;
+    return NULL;
+}
+
+// Remove any trailing blank characters (spaces, new lines, carriage returns)
+char *
+nullTrailingSpace(char *buf)
+{
+    int len = strlen(buf);
+    char *end = &buf[len-1];
+    while (end >= buf && *end <= ' ')
+        *(end--) = '\0';
+    while (*buf && *buf <= ' ')
+        buf++;
+    return buf;
+}