4 files changed, 61 insertions, 2 deletions
diff --git a/arch/x86/include/asm/handoff.h b/arch/x86/include/asm/handoff.h
new file mode 100644
index 00000000000..4d18d59efed
--- /dev/null
+++ b/arch/x86/include/asm/handoff.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Architecture-specific SPL handoff information for x86
+ *
+ * Copyright 2018 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#ifndef __x86_asm_handoff_h
+#define __x86_asm_handoff_h
+
+struct arch_spl_handoff {
+};
+
+#endif
diff --git a/arch/x86/include/asm/mrccache.h b/arch/x86/include/asm/mrccache.h
index 04783cd3292..40fda856ff4 100644
--- a/arch/x86/include/asm/mrccache.h
+++ b/arch/x86/include/asm/mrccache.h
@@ -103,4 +103,15 @@ int mrccache_get_region(struct udevice **devp, struct mrc_region *entry);
  */
 int mrccache_save(void);
 
+/**
+ * mrccache_spl_save() - Save to the MRC region from SPL
+ *
+ * When SPL is used to set up the memory controller we want to save the MRC
+ * data in SPL to avoid needing to pass it up to U-Boot proper to save. This
+ * function handles that.
+ *
+ * @return 0 if saved to SPI flash successfully, other error if failed
+ */
+int mrccache_spl_save(void);
+
 #endif /* _ASM_MRCCACHE_H */
diff --git a/arch/x86/include/asm/spl.h b/arch/x86/include/asm/spl.h
index 8cf59d14e7c..27432b28979 100644
--- a/arch/x86/include/asm/spl.h
+++ b/arch/x86/include/asm/spl.h
@@ -2,6 +2,19 @@
 /*
  * Copyright (C) 2017 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
- *
- * This file is required for SPL to build, but is empty.
  */
+
+#ifndef __asm_spl_h
+#define __asm_spl_h
+
+#define CONFIG_SPL_BOARD_LOAD_IMAGE
+
+enum {
+	BOOT_DEVICE_SPI		= 10,
+	BOOT_DEVICE_BOARD,
+	BOOT_DEVICE_CROS_VBOOT,
+};
+
+void jump_to_spl(ulong entry);
+
+#endif
diff --git a/arch/x86/include/asm/u-boot-x86.h b/arch/x86/include/asm/u-boot-x86.h
index 670fcdc0093..c252192bf41 100644
--- a/arch/x86/include/asm/u-boot-x86.h
+++ b/arch/x86/include/asm/u-boot-x86.h
@@ -13,7 +13,27 @@ extern char gdt_rom[];
 
 /* cpu/.../cpu.c */
 int arch_cpu_init(void);
+
+/**
+ * x86_cpu_init_f() - Set up basic features of the x86 CPU
+ *
+ * 0 on success, -ve on error
+ */
 int x86_cpu_init_f(void);
+
+/**
+ * x86_cpu_reinit_f() - Set up the CPU a second time
+ *
+ * Once cpu_init_f() has been called (e.g. in SPL) we should not call it
+ * again (e.g. in U-Boot proper) since it sets up the state from scratch.
+ * Call this function in later phases of U-Boot instead. It reads the CPU
+ * identify so that CPU functions can be used correctly, but does not change
+ * anything.
+ *
+ * @return 0 (indicating success, to mimic cpu_init_f())
+ */
+int x86_cpu_reinit_f(void);
+
 int cpu_init_f(void);
 void setup_gdt(struct global_data *id, u64 *gdt_addr);
 /*