Blackfin arch: SMP supporting patchset: some other misc code
Blackfin dual core BF561 processor can support SMP like features.
https://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:smp-like
In this patch, we provide SMP extend to some other misc code
Singed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index 004c06c..3a46843 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -200,6 +200,32 @@
endchoice
+config SMP
+ depends on BF561
+ bool "Symmetric multi-processing support"
+ ---help---
+ This enables support for systems with more than one CPU,
+ like the dual core BF561. If you have a system with only one
+ CPU, say N. If you have a system with more than one CPU, say Y.
+
+ If you don't know what to do here, say N.
+
+config NR_CPUS
+ int
+ depends on SMP
+ default 2 if BF561
+
+config IRQ_PER_CPU
+ bool
+ depends on SMP
+ default y
+
+config TICK_SOURCE_SYSTMR0
+ bool
+ select BFIN_GPTIMERS
+ depends on SMP
+ default y
+
config BF_REV_MIN
int
default 0 if (BF51x || BF52x || BF54x)
@@ -502,6 +528,7 @@
config GENERIC_TIME
bool "Generic time"
+ depends on !SMP
default y
config GENERIC_CLOCKEVENTS
@@ -576,6 +603,7 @@
menu "Blackfin Kernel Optimizations"
+ depends on !SMP
comment "Memory Optimizations"
@@ -738,7 +766,6 @@
endmenu
-
choice
prompt "Kernel executes from"
help
@@ -804,9 +831,11 @@
choice
prompt "Policy"
depends on BFIN_DCACHE
- default BFIN_WB
+ default BFIN_WB if !SMP
+ default BFIN_WT if SMP
config BFIN_WB
bool "Write back"
+ depends on !SMP
help
Write Back Policy:
Cached data will be written back to SDRAM only when needed.