On 3/25/21 9:22 PM, Leo Liang wrote:
Hi Green,
On Tue, Mar 23, 2021 at 01:35:38AM -0700, Green Wan wrote:
Add a callback riscv_hart_early_init() to ./arch/riscv/cpu/start.S to allow different riscv hart perform setup code for each hart as early as possible. Since all the harts enter the calback, they must be able to run the same setup.
Signed-off-by: Green Wan green.wan@sifive.com
arch/riscv/cpu/start.S | 5 +++++ arch/riscv/lib/spl.c | 4 ++++
This patch fails to compile for some defconfigs. (CI result: https://dev.azure.com/ycliang-tw/u-boot-riscv/_build/results?buildId=15&...)
Maybe we should come up with a better place to add this function.
arch/riscv/cpu/cpu.c is a good candidate.
--Sean
Best regards, Leo
2 files changed, 9 insertions(+)
diff --git a/arch/riscv/cpu/start.S b/arch/riscv/cpu/start.S index 8589509e01..5c7d4da9e2 100644 --- a/arch/riscv/cpu/start.S +++ b/arch/riscv/cpu/start.S @@ -117,6 +117,11 @@ call_board_init_f_0: mv sp, a0 #endif
+#if CONFIG_IS_ENABLED(RISCV_MMODE) +call_riscv_hart_early_init:
- jal riscv_hart_early_init
+#endif
- #ifndef CONFIG_XIP /*
- Pick hart to initialize global data and run U-Boot. The other harts
diff --git a/arch/riscv/lib/spl.c b/arch/riscv/lib/spl.c index 8baee07bea..e5b1affbfc 100644 --- a/arch/riscv/lib/spl.c +++ b/arch/riscv/lib/spl.c @@ -14,6 +14,10 @@
DECLARE_GLOBAL_DATA_PTR;
+__weak void riscv_hart_early_init(void) +{ +}
- __weak int spl_board_init_f(void) { return 0;