1 files changed, 147 insertions, 0 deletions
diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h
new file mode 100644
index 0000000000..33c8acc02e
--- /dev/null
+++ b/include/exec/ram_addr.h
@@ -0,0 +1,147 @@
+/*
+ * Declarations for cpu physical memory functions
+ *
+ * Copyright 2011 Red Hat, Inc. and/or its affiliates
+ *
+ * Authors:
+ *  Avi Kivity <avi@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later.  See the COPYING file in the top-level directory.
+ *
+ */
+
+/*
+ * This header is for use by exec.c and memory.c ONLY.  Do not include it.
+ * The functions declared here will be removed soon.
+ */
+
+#ifndef RAM_ADDR_H
+#define RAM_ADDR_H
+
+#ifndef CONFIG_USER_ONLY
+#include "hw/xen/xen.h"
+
+ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
+                                   MemoryRegion *mr);
+ram_addr_t qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr);
+void *qemu_get_ram_ptr(ram_addr_t addr);
+void qemu_ram_free(ram_addr_t addr);
+void qemu_ram_free_from_ptr(ram_addr_t addr);
+
+static inline bool cpu_physical_memory_get_dirty(ram_addr_t start,
+                                                 ram_addr_t length,
+                                                 unsigned client)
+{
+    unsigned long end, page, next;
+
+    assert(client < DIRTY_MEMORY_NUM);
+
+    end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
+    page = start >> TARGET_PAGE_BITS;
+    next = find_next_bit(ram_list.dirty_memory[client], end, page);
+
+    return next < end;
+}
+
+static inline bool cpu_physical_memory_get_dirty_flag(ram_addr_t addr,
+                                                      unsigned client)
+{
+    return cpu_physical_memory_get_dirty(addr, 1, client);
+}
+
+static inline bool cpu_physical_memory_is_clean(ram_addr_t addr)
+{
+    bool vga = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_VGA);
+    bool code = cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_CODE);
+    bool migration =
+        cpu_physical_memory_get_dirty_flag(addr, DIRTY_MEMORY_MIGRATION);
+    return !(vga && code && migration);
+}
+
+static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
+                                                      unsigned client)
+{
+    assert(client < DIRTY_MEMORY_NUM);
+    set_bit(addr >> TARGET_PAGE_BITS, ram_list.dirty_memory[client]);
+}
+
+static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
+                                                       ram_addr_t length)
+{
+    unsigned long end, page;
+
+    end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
+    page = start >> TARGET_PAGE_BITS;
+    bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end - page);
+    bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page);
+    bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_CODE], page, end - page);
+    xen_modified_memory(start, length);
+}
+
+static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
+                                                          ram_addr_t start,
+                                                          ram_addr_t pages)
+{
+    unsigned long i, j;
+    unsigned long page_number, c;
+    hwaddr addr;
+    ram_addr_t ram_addr;
+    unsigned long len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS;
+    unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
+    unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
+
+    /* start address is aligned at the start of a word? */
+    if (((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) {
+        long k;
+        long nr = BITS_TO_LONGS(pages);
+
+        for (k = 0; k < nr; k++) {
+            if (bitmap[k]) {
+                unsigned long temp = leul_to_cpu(bitmap[k]);
+
+                ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION][page + k] |= temp;
+                ram_list.dirty_memory[DIRTY_MEMORY_VGA][page + k] |= temp;
+                ram_list.dirty_memory[DIRTY_MEMORY_CODE][page + k] |= temp;
+            }
+        }
+        xen_modified_memory(start, pages);
+    } else {
+        /*
+         * bitmap-traveling is faster than memory-traveling (for addr...)
+         * especially when most of the memory is not dirty.
+         */
+        for (i = 0; i < len; i++) {
+            if (bitmap[i] != 0) {
+                c = leul_to_cpu(bitmap[i]);
+                do {
+                    j = ffsl(c) - 1;
+                    c &= ~(1ul << j);
+                    page_number = (i * HOST_LONG_BITS + j) * hpratio;
+                    addr = page_number * TARGET_PAGE_SIZE;
+                    ram_addr = start + addr;
+                    cpu_physical_memory_set_dirty_range(ram_addr,
+                                       TARGET_PAGE_SIZE * hpratio);
+                } while (c != 0);
+            }
+        }
+    }
+}
+
+static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
+                                                         ram_addr_t length,
+                                                         unsigned client)
+{
+    unsigned long end, page;
+
+    assert(client < DIRTY_MEMORY_NUM);
+    end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
+    page = start >> TARGET_PAGE_BITS;
+    bitmap_clear(ram_list.dirty_memory[client], page, end - page);
+}
+
+void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t length,
+                                     unsigned client);
+
+#endif
+#endif