[PATCH 1/1] riscv: ae350: Fix XIP config boot failure

[Leo Yu-Chi Liang]

The booting flow is SPL -> OpenSBI -> U-Boot.
The boot hart may change after OpenSBI and may not always be hart0,
so wrap the related branch instruction with M-MODE.

Current DTB setup for XIP is not valid.
There is no chance for CONFIG_SYS_FDT_BASE, the DTB address used
in XIP mode, to be returned. Fix this.

Fixes: 2e8d2f88439d ("riscv: Remove OF_PRIOR_STAGE from RISC-V boards")
Signed-off-by: Rick Chen <rick at andestech.com>
Signed-off-by: Leo Yu-Chi Liang <ycliang at andestech.com>
---
 arch/riscv/cpu/start.S                  |  3 ++-
 board/AndesTech/ax25-ae350/ax25-ae350.c | 17 +++++++++++------
 2 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/arch/riscv/cpu/start.S b/arch/riscv/cpu/start.S
index 76850ec9be..41c6f0858e 100644
--- a/arch/riscv/cpu/start.S
+++ b/arch/riscv/cpu/start.S
@@ -139,9 +139,10 @@ call_harts_early_init:
 	 * accesses gd).
 	 */
 	mv	gp, s0
+#if CONFIG_IS_ENABLED(RISCV_MMODE)
 	bnez	tp, secondary_hart_loop
 #endif
-
+#endif
 	jal	board_init_f_init_reserve
 
 	SREG	s1, GD_FIRMWARE_FDT_ADDR(gp)
diff --git a/board/AndesTech/ax25-ae350/ax25-ae350.c b/board/AndesTech/ax25-ae350/ax25-ae350.c
index d6a4291379..36f0dd4b0f 100644
--- a/board/AndesTech/ax25-ae350/ax25-ae350.c
+++ b/board/AndesTech/ax25-ae350/ax25-ae350.c
@@ -54,17 +54,22 @@ ulong board_flash_get_legacy(ulong base, int banknum, flash_info_t *info)
 	return 0;
 }
 
+#define ANDES_HW_DTB_ADDRESS	0xF2000000
 void *board_fdt_blob_setup(int *err)
 {
 	*err = 0;
-#if defined(CONFIG_OF_BOARD)
-	return (void *)(ulong)gd->arch.firmware_fdt_addr;
-#elif defined(CONFIG_OF_SEPARATE)
-	return (void *)CONFIG_SYS_FDT_BASE;
-#else
+
+	if (IS_ENABLED(CONFIG_OF_SEPARATE) || IS_ENABLED(CONFIG_OF_BOARD)) {
+		if (gd->arch.firmware_fdt_addr)
+			return (void *)(ulong)gd->arch.firmware_fdt_addr;
+	}
+
+	if (fdt_magic(CONFIG_SYS_FDT_BASE) == FDT_MAGIC)
+		return (void *)CONFIG_SYS_FDT_BASE;
+	return (void *)ANDES_HW_DTB_ADDRESS;
+
 	*err = -EINVAL;
 	return NULL;
-#endif
 }
 
 int smc_init(void)
-- 
2.34.1.390.g2ae0a9cb82