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| author | Alexey Brodkin | 2017-03-30 17:50:45 +0300 |
|---|---|---|
| committer | Alexey Brodkin | 2017-03-31 22:09:36 +0300 |
| commit | 6cba327bd96f90818a8beede51405228c54a5251 (patch) | |
| tree | 550e7fa730c46d52adec07e0b5945e7eadb5b01f | |
| parent | 2a5062ca9ecc22b88af2babf812b05dd97ecde46 (diff) | |
arcv2: Halt non-master cores
Even though we expect only master core to execute U-Boot code
let's make sure even if for some reason slave cores attempt to
execute U-Boot in parallel with master they get halted very early.
If platform wants it may kick-start slave cores before passing control
to say Linux kernel or any other application that want to see all cores
of SMP SoC up and running.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
| -rw-r--r-- | arch/arc/lib/start.S | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arc/lib/start.S b/arch/arc/lib/start.S index 90ee7e0fe40..b2ba7683097 100644 --- a/arch/arc/lib/start.S +++ b/arch/arc/lib/start.S @@ -10,6 +10,22 @@ #include <asm/arcregs.h> ENTRY(_start) + ; Non-masters will be halted immediately, they might be kicked later + ; by platform code right before passing control to the Linux kernel + ; in bootm.c:boot_jump_linux(). + lr r5, [identity] + lsr r5, r5, 8 + bmsk r5, r5, 7 + cmp r5, 0 + mov.nz r0, r5 + bz .Lmaster_proceed + flag 1 + nop + nop + nop + +.Lmaster_proceed: + /* Setup interrupt vector base that matches "__text_start" */ sr __ivt_start, [ARC_AUX_INTR_VEC_BASE] |