From 437fd90c0250dee670290f9b714253671a990160 Mon Sep 17 00:00:00 2001
From: José Pekkarinen <jose.pekkarinen@nokia.com>
Date: Wed, 18 May 2016 13:18:31 +0300
Subject: These changes are the raw update to qemu-2.6.
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Collission happened in the following patches:

migration: do cleanup operation after completion(738df5b9)
Bug fix.(1750c932f86)
kvmclock: add a new function to update env->tsc.(b52baab2)

The code provided by the patches was already in the upstreamed
version.

Change-Id: I3cc11841a6a76ae20887b2e245710199e1ea7f9a
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
---
 qemu/roms/seabios/src/e820map.c | 152 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 152 insertions(+)
 create mode 100644 qemu/roms/seabios/src/e820map.c

(limited to 'qemu/roms/seabios/src/e820map.c')

diff --git a/qemu/roms/seabios/src/e820map.c b/qemu/roms/seabios/src/e820map.c
new file mode 100644
index 000000000..39445cf63
--- /dev/null
+++ b/qemu/roms/seabios/src/e820map.c
@@ -0,0 +1,152 @@
+// Support for building memory maps suitable for int 15 e820 calls.
+//
+// Copyright (C) 2008,2009  Kevin O'Connor <kevin@koconnor.net>
+//
+// This file may be distributed under the terms of the GNU LGPLv3 license.
+
+#include "config.h" // BUILD_MAX_E820
+#include "e820map.h" // struct e820entry
+#include "output.h" // dprintf
+#include "string.h" // memmove
+
+
+/****************************************************************
+ * e820 memory map
+ ****************************************************************/
+
+// Info on e820 map location and size.
+struct e820entry e820_list[BUILD_MAX_E820] VARFSEG;
+int e820_count VARFSEG;
+
+// Remove an entry from the e820_list.
+static void
+remove_e820(int i)
+{
+    e820_count--;
+    memmove(&e820_list[i], &e820_list[i+1]
+            , sizeof(e820_list[0]) * (e820_count - i));
+}
+
+// Insert an entry in the e820_list at the given position.
+static void
+insert_e820(int i, u64 start, u64 size, u32 type)
+{
+    if (e820_count >= BUILD_MAX_E820) {
+        warn_noalloc();
+        return;
+    }
+
+    memmove(&e820_list[i+1], &e820_list[i]
+            , sizeof(e820_list[0]) * (e820_count - i));
+    e820_count++;
+    struct e820entry *e = &e820_list[i];
+    e->start = start;
+    e->size = size;
+    e->type = type;
+}
+
+static const char *
+e820_type_name(u32 type)
+{
+    switch (type) {
+    case E820_RAM:      return "RAM";
+    case E820_RESERVED: return "RESERVED";
+    case E820_ACPI:     return "ACPI";
+    case E820_NVS:      return "NVS";
+    case E820_UNUSABLE: return "UNUSABLE";
+    default:            return "UNKNOWN";
+    }
+}
+
+// Show the current e820_list.
+static void
+dump_map(void)
+{
+    dprintf(1, "e820 map has %d items:\n", e820_count);
+    int i;
+    for (i=0; i<e820_count; i++) {
+        struct e820entry *e = &e820_list[i];
+        u64 e_end = e->start + e->size;
+        dprintf(1, "  %d: %016llx - %016llx = %d %s\n", i
+                , e->start, e_end, e->type, e820_type_name(e->type));
+    }
+}
+
+#define E820_HOLE         ((u32)-1) // Used internally to remove entries
+
+// Add a new entry to the list.  This scans for overlaps and keeps the
+// list sorted.
+void
+e820_add(u64 start, u64 size, u32 type)
+{
+    dprintf(8, "Add to e820 map: %08llx %08llx %d\n", start, size, type);
+
+    if (! size)
+        // Huh?  Nothing to do.
+        return;
+
+    // Find position of new item (splitting existing item if needed).
+    u64 end = start + size;
+    int i;
+    for (i=0; i<e820_count; i++) {
+        struct e820entry *e = &e820_list[i];
+        u64 e_end = e->start + e->size;
+        if (start > e_end)
+            continue;
+        // Found position - check if an existing item needs to be split.
+        if (start > e->start) {
+            if (type == e->type) {
+                // Same type - merge them.
+                size += start - e->start;
+                start = e->start;
+            } else {
+                // Split existing item.
+                e->size = start - e->start;
+                i++;
+                if (e_end > end)
+                    insert_e820(i, end, e_end - end, e->type);
+            }
+        }
+        break;
+    }
+    // Remove/adjust existing items that are overlapping.
+    while (i<e820_count) {
+        struct e820entry *e = &e820_list[i];
+        if (end < e->start)
+            // No overlap - done.
+            break;
+        u64 e_end = e->start + e->size;
+        if (end >= e_end) {
+            // Existing item completely overlapped - remove it.
+            remove_e820(i);
+            continue;
+        }
+        // Not completely overlapped - adjust its start.
+        e->start = end;
+        e->size = e_end - end;
+        if (type == e->type) {
+            // Same type - merge them.
+            size += e->size;
+            remove_e820(i);
+        }
+        break;
+    }
+    // Insert new item.
+    if (type != E820_HOLE)
+        insert_e820(i, start, size, type);
+    //dump_map();
+}
+
+// Remove any definitions in a memory range (make a memory hole).
+void
+e820_remove(u64 start, u64 size)
+{
+    e820_add(start, size, E820_HOLE);
+}
+
+// Report on final memory locations.
+void
+e820_prepboot(void)
+{
+    dump_map();
+}
-- 
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