[U-Boot] [PATCH 19/19] riscv: Allow U-Boot to run on hart 0 only

[Bin Meng]

Allow U-Boot to run on hart 0 only, and suspend other harts.

With this change, '-smp n' works on QEMU RISC-V board.

Signed-off-by: Bin Meng <bmeng.cn at gmail.com>

---

 arch/riscv/cpu/start.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/riscv/cpu/start.S b/arch/riscv/cpu/start.S
index 9858058..fcb0466 100644
--- a/arch/riscv/cpu/start.S
+++ b/arch/riscv/cpu/start.S
@@ -46,6 +46,10 @@ _start:
 	/* mask all interrupts */
 	csrw	mie, zero
 
+	csrr t0, mhartid
+	beqz t0, call_board_init_f
+1:	j 1b
+
 /*
  * Set stackpointer in internal/ex RAM to call board_init_f
  */
-- 
2.7.4