sandbox: Add basic SPL implementation

Add an sandbox implementation for the generic SPL framework. This supports
locating and running U-Boot proper.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/sandbox/cpu/Makefile b/arch/sandbox/cpu/Makefile
index 1b42fee141277b0ca917ae14c265f72d9c73d2b5..db4363358a85dee0949dd1a683873afd8470cd58 100644 (file)
--- a/arch/sandbox/cpu/Makefile
+++ b/arch/sandbox/cpu/Makefile
@@ -8,6 +8,7 @@
 #
 
 obj-y  := cpu.o os.o start.o state.o
+obj-$(CONFIG_SPL_BUILD)        += spl.o
 obj-$(CONFIG_ETH_SANDBOX_RAW)  += eth-raw-os.o
 obj-$(CONFIG_SANDBOX_SDL)      += sdl.o
 

diff --git a/arch/sandbox/cpu/spl.c b/arch/sandbox/cpu/spl.c
new file mode 100644 (file)
index 0000000..e17c0ed
--- /dev/null
+++ b/arch/sandbox/cpu/spl.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2016 Google, Inc
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <os.h>
+#include <asm/spl.h>
+#include <asm/state.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void board_init_f(ulong flag)
+{
+       struct sandbox_state *state = state_get_current();
+
+       gd->arch.ram_buf = state->ram_buf;
+       gd->ram_size = state->ram_size;
+}
+
+u32 spl_boot_device(void)
+{
+       return BOOT_DEVICE_BOARD;
+}
+
+void spl_board_announce_boot_device(void)
+{
+       char fname[256];
+       int ret;
+
+       ret = os_find_u_boot(fname, sizeof(fname));
+       if (ret) {
+               printf("(%s not found, error %d)\n", fname, ret);
+               return;
+       }
+       printf("%s\n", fname);
+}
+
+int spl_board_load_image(void)
+{
+       char fname[256];
+       int ret;
+
+       ret = os_find_u_boot(fname, sizeof(fname));
+       if (ret)
+               return ret;
+
+       /* Hopefully this will not return */
+       return os_spl_to_uboot(fname);
+}

diff --git a/arch/sandbox/include/asm/spl.h b/arch/sandbox/include/asm/spl.h
new file mode 100644 (file)
index 0000000..59f2401
--- /dev/null
+++ b/arch/sandbox/include/asm/spl.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2016 Google, Inc
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef __asm_spl_h
+#define __asm_spl_h
+
+#define CONFIG_SPL_BOARD_LOAD_IMAGE
+
+/**
+ * Board-specific load method for boards that have a special way of loading
+ * U-Boot, which does not fit with the existing SPL code.
+ *
+ * @return 0 on success, negative errno value on failure.
+ */
+int spl_board_load_image(void);
+
+enum {
+       BOOT_DEVICE_BOARD,
+};
+
+#endif