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-rw-r--r--board/emulation/qemu-riscv/Kconfig1
-rw-r--r--board/emulation/qemu-riscv/qemu-riscv.c39
2 files changed, 40 insertions, 0 deletions
diff --git a/board/emulation/qemu-riscv/Kconfig b/board/emulation/qemu-riscv/Kconfig
index be5839b7db..33ca253432 100644
--- a/board/emulation/qemu-riscv/Kconfig
+++ b/board/emulation/qemu-riscv/Kconfig
@@ -30,5 +30,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy
imply CMD_EXT4
imply CMD_FAT
imply BOARD_LATE_INIT
+ imply OF_BOARD_SETUP
endif
diff --git a/board/emulation/qemu-riscv/qemu-riscv.c b/board/emulation/qemu-riscv/qemu-riscv.c
index 587f2c4909..d6167aaef1 100644
--- a/board/emulation/qemu-riscv/qemu-riscv.c
+++ b/board/emulation/qemu-riscv/qemu-riscv.c
@@ -48,3 +48,42 @@ int board_late_init(void)
return 0;
}
+
+/*
+ * QEMU specifies the location of Linux (supplied with the -kernel argument)
+ * in the device tree using the riscv,kernel-start and riscv,kernel-end
+ * properties. We currently rely on the SBI implementation of BBL to run
+ * Linux and therefore embed Linux as payload in BBL. This causes an issue,
+ * because BBL detects the kernel properties in the device tree and ignores
+ * the Linux payload as a result. To work around this issue, we clear the
+ * kernel properties before booting Linux.
+ *
+ * This workaround can be removed, once we do not require BBL for its SBI
+ * implementation anymore.
+ */
+int ft_board_setup(void *blob, bd_t *bd)
+{
+ int chosen_offset, ret;
+
+ chosen_offset = fdt_path_offset(blob, "/chosen");
+ if (chosen_offset < 0)
+ return 0;
+
+#ifdef CONFIG_ARCH_RV64I
+ ret = fdt_setprop_u64(blob, chosen_offset, "riscv,kernel-start", 0);
+#else
+ ret = fdt_setprop_u32(blob, chosen_offset, "riscv,kernel-start", 0);
+#endif
+ if (ret)
+ return ret;
+
+#ifdef CONFIG_ARCH_RV64I
+ ret = fdt_setprop_u64(blob, chosen_offset, "riscv,kernel-end", 0);
+#else
+ ret = fdt_setprop_u32(blob, chosen_offset, "riscv,kernel-end", 0);
+#endif
+ if (ret)
+ return ret;
+
+ return 0;
+}