diff options
| author | Xiang Wang <wxjstz@126.com> | 2018-10-11 17:42:49 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2018-11-05 09:03:50 +0000 |
| commit | 26f725efc235b282e20aa678f8e683a014920b71 (patch) | |
| tree | 3cab86c6a9218f727e321fcd93fb126a26097089 /src/arch/riscv/stages.c | |
| parent | 7c9540ea1d46a776ec92b58f99074f51b430f9bb (diff) | |
riscv: add support to block smp in each stage
Each stage performs some basic initialization (stack, HLS etc) and then
call smp_pause to enter the single-threaded state. The main work of each
stage is executed in a single-threaded state, and the multi-threaded
state is restored by call smp_resume while booting the next stage.
Change-Id: I8d508c3d0f65a022010e74f8edad7ad2cfdc7dee
Signed-off-by: Xiang Wang <wxjstz@126.com>
Reviewed-on: https://review.coreboot.org/29024
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-by: Philipp Hug <philipp@hug.cx>
Diffstat (limited to 'src/arch/riscv/stages.c')
| -rw-r--r-- | src/arch/riscv/stages.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/arch/riscv/stages.c b/src/arch/riscv/stages.c index 80754762bd..4fe040934e 100644 --- a/src/arch/riscv/stages.c +++ b/src/arch/riscv/stages.c @@ -27,10 +27,13 @@ #include <arch/boot.h> #include <arch/encoding.h> #include <arch/stages.h> +#include <arch/smp/smp.h> #include <rules.h> void stage_entry(void) { + smp_pause(CONFIG_RISCV_WORKING_HARTID); + /* * Save the FDT pointer before entering ramstage, because mscratch * might be overwritten in the trap handler, and there is code in |