[v2,09/12] ARC: [plat-eznps] Update the init sequence of aux regs per cpu.

Message ID 1497362636-30353-10-git-send-email-noamca@mellanox.com
State New
Headers show

Commit Message

Noam Camus June 13, 2017, 2:03 p.m.
From: Liav Rehana <liavr@mellanox.com>

The following commit adds a config that will enable us to distinguish
between building the kernel for platforms that have a different set
of auxiliary registers for each cpu and platforms that have a shared
set of auxiliary registers across every thread in each core.
On platforms that implement a different set of auxiliary registers
there is a need to initialize them on every cpu and not just the for the
first thread of the core.

Signed-off-by: Liav Rehana <liavr@mellanox.com>
Signed-off-by: Noam Camus <noamca@mellanox.com>
 arch/arc/plat-eznps/Kconfig |   11 +++++++++++
 arch/arc/plat-eznps/entry.S |    2 +-
 2 files changed, 12 insertions(+), 1 deletions(-)


diff --git a/arch/arc/plat-eznps/Kconfig b/arch/arc/plat-eznps/Kconfig
index fa25136..019de58 100644
--- a/arch/arc/plat-eznps/Kconfig
+++ b/arch/arc/plat-eznps/Kconfig
@@ -44,3 +44,14 @@  config EZNPS_MEM_ERROR
 	  real chip architecture).This configuration will cause the kernel
 	  to handle memory error similar to a machine check exception.
 	  It means NOT sending a SIGBUS, but panic the system.
+	bool "ARC-EZchip Shared Auxiliary Registers Per Core"
+	depends on ARC_PLAT_EZNPS
+	default y
+	help
+	  On the real chip of the NPS, auxiliary registers are shared between
+	  all the cpus of the core, whereas on simulator platform for NPS,
+	  each cpu has a different set of auxiliary registers. Configuration
+	  should be unset if auxiliary registers are not shared between the cpus
+	  of the core, so there will be a need to initialize them per cpu.
diff --git a/arch/arc/plat-eznps/entry.S b/arch/arc/plat-eznps/entry.S
index 328261c..091c92c 100644
--- a/arch/arc/plat-eznps/entry.S
+++ b/arch/arc/plat-eznps/entry.S
@@ -27,7 +27,7 @@ 
 	.align 1024	; HW requierment for restart first PC
 	; There is no work for HW thread id != 0
 	cmp	r3, 0