x86: broadwell: Allow booting from SPL
At present broadwell only supports booting straight into U-Boot proper.
Add a separate init file to boot from SPL into U-Boot proper, and select
it when SPL is in use.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/broadwell/cpu_from_spl.c b/arch/x86/cpu/broadwell/cpu_from_spl.c
new file mode 100644
index 0000000..c3d4a8d
--- /dev/null
+++ b/arch/x86/cpu/broadwell/cpu_from_spl.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2016 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#include <common.h>
+#include <bloblist.h>
+#include <debug_uart.h>
+#include <handoff.h>
+#include <asm/mtrr.h>
+
+int misc_init_r(void)
+{
+ return 0;
+}
+
+int dram_init(void)
+{
+ struct spl_handoff *ho;
+
+ ho = bloblist_find(BLOBLISTT_SPL_HANDOFF, sizeof(*ho));
+ if (!ho)
+ return log_msg_ret("Missing SPL hand-off info", -ENOENT);
+ handoff_load_dram_size(ho);
+#ifdef CONFIG_TPL
+ /* TODO(sjg@chromium.org): MTRR cannot be adjusted without a hang */
+ mtrr_add_request(MTRR_TYPE_WRBACK, 0, 2ULL << 30);
+#else
+ mtrr_add_request(MTRR_TYPE_WRBACK, 0, gd->ram_size);
+ mtrr_commit(true);
+#endif
+
+ return 0;
+}
+
+int checkcpu(void)
+{
+ return 0;
+}
+
+int print_cpuinfo(void)
+{
+ return 0;
+}
+
+void board_debug_uart_init(void)
+{
+}
+
+int dram_init_banksize(void)
+{
+#ifdef CONFIG_NR_DRAM_BANKS
+ struct spl_handoff *ho;
+
+ ho = bloblist_find(BLOBLISTT_SPL_HANDOFF, sizeof(*ho));
+ if (!ho)
+ return log_msg_ret("Missing SPL hand-off info", -ENOENT);
+ handoff_load_dram_banks(ho);
+#endif
+
+ return 0;
+}