riscv: setup per-hart stack earlier
Harts need to use per-hart stack before any function call, even if that
function is a simple one. When the callee uses stack for register save/
restore, especially RA, if nested call, concurrent access by multiple
harts on the same stack will cause data-race.
This patch sets up SP before `board_init_f_alloc_reserve`. A side effect
of this is that the memory layout has changed as the following:
+----------------+ +----------------+ <----- SPL_STACK/
| ...... | | hart 0 stack | SYS_INIT_SP_ADDR
| malloc_base | +----------------+
+----------------+ | hart 1 stack |
| GD | +----------------+ If not SMP, N=1
+----------------+ | ...... |
| hart 0 stack | +----------------+
+----------------+ ==> | hart N-1 stack|
| hart 1 stack | +----------------+
+----------------+ | ...... |
| ...... | | malloc_base |
+----------------+ +----------------+
| hart N-1 stack| | GD |
+----------------+ +----------------+
| | | |
Signed-off-by: Bo Gan <ganboing@gmail.com>
Cc: Rick Chen <rick@andestech.com>
Cc: Leo <ycliang@andestech.com>
Cc: Sean Anderson <seanga2@gmail.com>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Rick Chen <rick@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
1 file changed