MN10300: Make various interrupt priority settings configurable
Make the settings of interrupt priorities used by various services configurable
at run time.
Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
index a1f334c..a0a16e6 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig
@@ -351,6 +351,80 @@
endmenu
+menu "Interrupt request priority options"
+
+comment "[!] NOTE: A lower number/level indicates a higher priority (0 is highest, 6 is lowest)"
+
+comment "____Non-maskable interrupt levels____"
+comment "The following must be set to a higher priority than local_irq_disable() and on-chip serial"
+
+config GDBSTUB_IRQ_LEVEL
+ int "GDBSTUB interrupt priority"
+ depends on GDBSTUB
+ range 0 1 if LINUX_CLI_LEVEL = 2
+ range 0 2 if LINUX_CLI_LEVEL = 3
+ range 0 3 if LINUX_CLI_LEVEL = 4
+ range 0 4 if LINUX_CLI_LEVEL = 5
+ range 0 5 if LINUX_CLI_LEVEL = 6
+ default 0
+
+comment "The following must be set to a higher priority than local_irq_disable()"
+
+config MN10300_SERIAL_IRQ_LEVEL
+ int "MN10300 on-chip serial interrupt priority"
+ depends on MN10300_TTYSM
+ range 1 1 if LINUX_CLI_LEVEL = 2
+ range 1 2 if LINUX_CLI_LEVEL = 3
+ range 1 3 if LINUX_CLI_LEVEL = 4
+ range 1 4 if LINUX_CLI_LEVEL = 5
+ range 1 5 if LINUX_CLI_LEVEL = 6
+ default 1
+
+comment "-"
+comment "____Maskable interrupt levels____"
+
+config LINUX_CLI_LEVEL
+ int "The highest interrupt priority excluded by local_irq_disable() (2-6)"
+ range 2 6
+ default 2
+ help
+ local_irq_disable() doesn't actually disable maskable interrupts -
+ what it does is restrict the levels of interrupt which are permitted
+ (a lower level indicates a higher priority) by lowering the value in
+ EPSW.IM from 7. Any interrupt is permitted for which the level is
+ lower than EPSW.IM.
+
+ Certain interrupts, such as GDBSTUB and virtual MN10300 on-chip
+ serial DMA interrupts are allowed to interrupt normal disabled
+ sections.
+
+comment "The following must be set to a equal to or lower priority than LINUX_CLI_LEVEL"
+
+config TIMER_IRQ_LEVEL
+ int "Kernel timer interrupt priority"
+ range LINUX_CLI_LEVEL 6
+ default 4
+
+config PCI_IRQ_LEVEL
+ int "PCI interrupt priority"
+ depends on PCI
+ range LINUX_CLI_LEVEL 6
+ default 5
+
+config ETHERNET_IRQ_LEVEL
+ int "Ethernet interrupt priority"
+ depends on SMC91X || SMC911X || SMSC911X
+ range LINUX_CLI_LEVEL 6
+ default 6
+
+config EXT_SERIAL_IRQ_LEVEL
+ int "External serial port interrupt priority"
+ depends on SERIAL_8250
+ range LINUX_CLI_LEVEL 6
+ default 6
+
+endmenu
+
source "mm/Kconfig"
menu "Power management options"