bsps: Move bsp-fdt.c to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

1 files changed, 65 insertions, 0 deletions

diff --git a/bsps/shared/start/bsp-fdt.c b/bsps/shared/start/bsp-fdt.c
new file mode 100644
index 0000000000..7e8d8922a8
--- /dev/null
+++ b/bsps/shared/start/bsp-fdt.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2015, 2017 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#include <sys/param.h>
+
+#include <libfdt.h>
+
+#include <bsp/fdt.h>
+#include <bsp/linker-symbols.h>
+
+#ifndef BSP_FDT_IS_SUPPORTED
+#warning "BSP FDT support indication not defined"
+#endif
+
+#ifndef BSP_FDT_BLOB_SIZE_MAX
+#define BSP_FDT_BLOB_SIZE_MAX 0
+#endif
+
+#ifdef BSP_FDT_BLOB_READ_ONLY
+static const uint32_t
+bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)] = { 0xdeadbeef };
+#else
+static uint32_t
+bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)];
+#endif
+
+void bsp_fdt_copy(const void *src)
+{
+  const uint32_t *s = (const uint32_t *) src;
+#ifdef BSP_FDT_BLOB_COPY_TO_READ_ONLY_LOAD_AREA
+  uint32_t *d = (uint32_t *) ((uintptr_t) &bsp_fdt_blob[0]
+    - (uintptr_t) bsp_section_rodata_begin
+    + (uintptr_t) bsp_section_rodata_load_begin);
+#else
+  uint32_t *d = RTEMS_DECONST(uint32_t *, &bsp_fdt_blob[0]);
+#endif
+
+  if (s != d) {
+    size_t m = MIN(sizeof(bsp_fdt_blob), fdt_totalsize(src));
+    size_t n = (m + sizeof(*d) - 1) / sizeof(*d);
+    size_t i;
+
+    for (i = 0; i < n; ++i) {
+      d[i] = s[i];
+    }
+
+    rtems_cache_flush_multiple_data_lines(d, m);
+  }
+}
+
+const void *bsp_fdt_get(void)
+{
+  return &bsp_fdt_blob[0];
+}