1 files changed, 65 insertions, 0 deletions
diff --git a/libgloss/mips/hal/get_ram_range.c b/libgloss/mips/hal/get_ram_range.c
new file mode 100644
index 0000000..429d948
--- /dev/null
+++ b/libgloss/mips/hal/get_ram_range.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2014-2018 MIPS Tech, LLC
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include <_ansi.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#if _MIPS_SIM == _ABI64
+# define K0BASE 0xFFFFFFFF80000000LL
+#else
+# define K0BASE 0x80000000
+#endif
+void
+_get_ram_range (void **ram_base, void **ram_extent)
+{
+  struct s_mem
+  {
+    unsigned int size;
+    unsigned int icsize;
+    unsigned int dcsize;
+  } mem;
+  void get_mem_info (struct s_mem*);
+
+  /* The sizeof (s_mem.size) must be 4 bytes.  The compiler should be
+     able to eliminate this check */
+  if (sizeof (unsigned int) != 4)
+    {
+      *ram_extent = 0;
+      return;
+    }
+
+  get_mem_info (&mem);
+
+  /* NOTE: The value returned from the get_mem_info call is the amount
+     of memory, and not the address of the (last byte + 1) */
+
+  if (ram_base)
+    *ram_base = (void*)K0BASE;
+  *ram_extent = (void*)(uintptr_t)(K0BASE + mem.size);
+}