spl: Add support for passing handoff info to U-Boot proper
There is some basic informaton that SPL normally wants to pass through to
U-Boot, such as the SDRAM size and bank information.
Mkae use of the new bloblist structure for this. Add a new 'handoff' blob
which is set up in SPL and passed to U-Boot proper. Also adda test for
sandbox_spl that checks that this works correctly and a new 'sb' command
to show the information passed from SPL.
Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/init/handoff.c b/common/init/handoff.c
new file mode 100644
index 0000000..e00b43e
--- /dev/null
+++ b/common/init/handoff.c
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Passing basic information from SPL to U-Boot proper
+ *
+ * Copyright 2018 Google, Inc
+ */
+
+#include <common.h>
+#include <handoff.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void handoff_save_dram(struct spl_handoff *ho)
+{
+ ho->ram_size = gd->ram_size;
+#ifdef CONFIG_NR_DRAM_BANKS
+ {
+ struct bd_info *bd = gd->bd;
+ int i;
+
+ for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+ ho->ram_bank[i].start = bd->bi_dram[i].start;
+ ho->ram_bank[i].size = bd->bi_dram[i].size;
+ }
+ }
+#endif
+}
+
+void handoff_load_dram_size(struct spl_handoff *ho)
+{
+ gd->ram_size = ho->ram_size;
+}
+
+void handoff_load_dram_banks(struct spl_handoff *ho)
+{
+#ifdef CONFIG_NR_DRAM_BANKS
+ {
+ struct bd_info *bd = gd->bd;
+ int i;
+
+ for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+ bd->bi_dram[i].start = ho->ram_bank[i].start;
+ bd->bi_dram[i].size = ho->ram_bank[i].size;
+ }
+ }
+#endif
+}