diff options
| author | Shawn Guo <shawn.guo@linaro.org> | 2013-04-16 18:11:19 +0400 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@linaro.org> | 2013-05-12 17:39:18 +0400 |
| commit | 087bb28329f3ccda4e50cb4cf297542d7e773e20 (patch) | |
| tree | 4654c4ebd9c2417d3f1264d093686f61cfd2c756 /arch/arm/mach-imx/headsmp.S | |
| parent | 0e574461c4c915a065dd75c894edb653ce99be9c (diff) | |
| download | linux-087bb28329f3ccda4e50cb4cf297542d7e773e20.tar.xz | |
ARM: imx: replicate the diagnostic register of boot cpu into secondary cores
The diagnostic register holds the errata bits. Mostly bootloader
does not bring up secondary cores, so that when errata bits are set
in bootloader, they are set only for boot cpu. But on a SMP
configuration, it should be equally done on every single core.
Set up the diagnostic register for secondary cores by replicating
the register from boot cpu.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>
Diffstat (limited to 'arch/arm/mach-imx/headsmp.S')
| -rw-r--r-- | arch/arm/mach-imx/headsmp.S | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/headsmp.S b/arch/arm/mach-imx/headsmp.S index 67b9c48dcafe..627f16f0e9d1 100644 --- a/arch/arm/mach-imx/headsmp.S +++ b/arch/arm/mach-imx/headsmp.S @@ -18,8 +18,20 @@ .section ".text.head", "ax" #ifdef CONFIG_SMP +diag_reg_offset: + .word g_diag_reg - . + + .macro set_diag_reg + adr r0, diag_reg_offset + ldr r1, [r0] + add r1, r1, r0 @ r1 = physical &g_diag_reg + ldr r0, [r1] + mcr p15, 0, r0, c15, c0, 1 @ write diagnostic register + .endm + ENTRY(v7_secondary_startup) bl v7_invalidate_l1 + set_diag_reg b secondary_startup ENDPROC(v7_secondary_startup) #endif |