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Commit 37e4ec96 authored by Akira Takeuchi's avatar Akira Takeuchi Committed by David Howells
Browse files

MN10300: Make various interrupt priority settings configurable 



Make the settings of interrupt priorities used by various services configurable
at run time.

Signed-off-by: default avatarAkira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: default avatarKiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
parent ab244c1a

arch/mn10300/Kconfig

+74 −0
Original line number Diff line number Diff line
@@ -351,6 +351,80 @@ config MN10300_TTYSM2_CTS 


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"

arch/mn10300/include/asm/irqflags.h

+2 −6
Original line number Diff line number Diff line
@@ -23,11 +23,7 @@ 
 *   - level 6 - timer interrupt

 * - "enabled":  run in IM7

 */

#ifdef CONFIG_MN10300_TTYSM

#define MN10300_CLI_LEVEL	EPSW_IM_2

#else

#define MN10300_CLI_LEVEL	EPSW_IM_1

#endif

#define MN10300_CLI_LEVEL	(CONFIG_LINUX_CLI_LEVEL << EPSW_IM_SHIFT)



#ifndef __ASSEMBLY__
@@ -94,7 +90,7 @@ static inline void arch_local_irq_restore(unsigned long flags) 


static inline bool arch_irqs_disabled_flags(unsigned long flags)

{

	return (flags & EPSW_IM) <= MN10300_CLI_LEVEL;

	return (flags & (EPSW_IE | EPSW_IM)) != (EPSW_IE | EPSW_IM_7);

}



static inline bool arch_irqs_disabled(void)