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firmware: fw_base.S: fix multi-core boot bug.

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In a multi-core startup scenario, if both _try_lottery and
_wait_for_boot_hart use the data in the _boot_status address, when
a CPU enters OpenSBI later than boot hart set the _boot_status to
BOOT_STATUS_BOOT_HART_DONE, the CPU will modify _boot_status to 1
by amoswap.w and will never be awakened in _wait_for_boot_hart.
So let _try_lottery and _boot_status use data from two addresses.

Fixes: 8151105af5 ("firmware: fw_base.S: Remove _relocate_lottery")
Signed-off-by: dong.yang <dong.yang@sophgo.com>
Reviewed-by: Xing Xiaoguang <xiaoguang.xing@sophgo.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
dong.yang
2024-09-13 12:36:39 +08:00
committed by Anup Patel
parent 7b3de48cd5
commit 3e141a6950
1 changed files with 6 additions and 4 deletions
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10
firmware/fw_base.S
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@@ -14,8 +14,8 @@
#include <sbi/sbi_scratch.h>
#include <sbi/sbi_trap.h>
#define BOOT_STATUS_LOTTERY_DONE 1
#define BOOT_STATUS_BOOT_HART_DONE 2
#define BOOT_LOTTERY_ACQUIRED 1
#define BOOT_STATUS_BOOT_HART_DONE 1
.macro MOV_3R __d0, __s0, __d1, __s1, __d2, __s2
add \__d0, \__s0, zero
@@ -47,8 +47,8 @@ _start:
bne a0, a6, _wait_for_boot_hart
_try_lottery:
/* Jump to relocation wait loop if we don't get relocation lottery */
lla a6, _boot_status
li a7, BOOT_STATUS_LOTTERY_DONE
lla a6, _boot_lottery
li a7, BOOT_LOTTERY_ACQUIRED
amoswap.w a6, a7, (a6)
bnez a6, _wait_for_boot_hart
@@ -357,6 +357,8 @@ _skip_trap_handler_hyp:
.data
.align 3
_boot_lottery:
RISCV_PTR 0
_boot_status:
RISCV_PTR 0