diff mbox series

[U-Boot,v7,2/4] riscv: qemu: Use different SYS_TEXT_BASE for S-mode

Message ID 20181203052743.29036-3-anup@brainfault.org
State Accepted
Delegated to: Andes
Headers show
Series [U-Boot,v7,1/4] riscv: Add kconfig option to run U-Boot in S-mode | expand

Commit Message

Anup Patel Dec. 3, 2018, 5:27 a.m. UTC 
When u-boot runs in S-mode, the M-mode runtime firmware
(BBL or equivalent) uses memory range in 0x80000000 to
0x80200000. Due to this, we cannot use 0x80000000 as
SYS_TEXT_BASE when running in S-mode. Instead for S-mode,
we use 0x80200000 as SYS_TEXT_BASE.

Even Linux RISC-V kernel ignores/reserves memory range
0x80000000 to 0x80200000 because it runs in S-mode.

Signed-off-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
---
 board/emulation/qemu-riscv/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/board/emulation/qemu-riscv/Kconfig b/board/emulation/qemu-riscv/Kconfig
index 33ca253432..56bb5337d4 100644
--- a/board/emulation/qemu-riscv/Kconfig
+++ b/board/emulation/qemu-riscv/Kconfig
@@ -13,7 +13,8 @@  config SYS_CONFIG_NAME
 	default "qemu-riscv"
 
 config SYS_TEXT_BASE
-	default 0x80000000
+	default 0x80000000 if !RISCV_SMODE
+	default 0x80200000 if RISCV_SMODE
 
 config BOARD_SPECIFIC_OPTIONS # dummy
 	def_bool y