GitHub-Mirror/u-boot
2
0
Fork 0
mirror of https://github.com/Fishwaldo/u-boot.git synced 2025-03-21 22:51:37 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

arc: Don't halt slaves

Browse source 
This commit basically reverts two commits:
 1. cf628f772e ("arc: arcv1: Disable master/slave check")
 2. 6cba327bd9 ("arcv2: Halt non-master cores")

With mentioned commits in-place we experience more trouble than
benefits. In case of SMP Linux kernel this is really required as
we have all the cores running from the very beginning and then we
need to allow master core to do some preparatory work while slaves
are not getting in the way.

In case of U-Boot we:
 a) Don't really run more than 1 core in parallel
 b) We may use whatever core for that

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
This commit is contained in:
Alexey Brodkin 2018-01-24 15:27:04 +03:00
parent 2178817c4a
commit 0a097ba54b
1 changed files with 0 additions and 20 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
arch/arc/lib/start.S
View file

@ -10,26 +10,6 @@
#include <asm/arcregs.h>
ENTRY(_start)
; ARCompact devices are not supposed to be SMP so master/slave check
; makes no sense.
#ifdef CONFIG_ISA_ARCV2
; 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:
#endif
/* Setup interrupt vector base that matches "__text_start" */
sr __ivt_start, [ARC_AUX_INTR_VEC_BASE]