* IRQ0 handler
@ 2003-09-02 15:31 Chris Simmonds
2003-09-04 7:55 ` John Zhou
0 siblings, 1 reply; 2+ messages in thread
From: Chris Simmonds @ 2003-09-02 15:31 UTC (permalink / raw)
To: linuxppc-embedded
Hi,
Can anybody tell me how to install a handler for irq0 on an 8xx
platform? Doing the obvious (request_8xxirq (SIU_IRQ0 ...)) doesn't seem
to work. It seems that I need to modify head_8xx.S so that the excption
handler for 0x100 is do_IRQ instead of UnKnownException. I tried the
patch below, but now I get a Software Emulation trap (0x1000). Any help
gratefully accepted.
Chris.
/* System reset */
#ifdef CONFIG_SMP /* MVME/MTX start the secondary here */
STD_EXCEPTION(0x100, Reset, __secondary_start_psurge)
#else
/****
Replace norrmal NMI handler with do_IRQ
STD_EXCEPTION(0x100, Reset, UnknownException)
****/
NMI_Interrupt:
EXCEPTION_PROLOG;
addi r3,r1,STACK_FRAME_OVERHEAD
li r20,MSR_KERNEL
li r4,0
bl transfer_to_handler
.long do_IRQ;
.long ret_from_intercept
#endif
--
Chris Simmonds 2net Limited
chris@2net.co.uk http://www.2net.co.uk/
Tel: +44 (0)1962 869003 Fax: +44 (0)870 056 7556
"If it's not connected, it's not effective"(tm)
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 2+ messages in thread* RE: IRQ0 handler
2003-09-02 15:31 IRQ0 handler Chris Simmonds
@ 2003-09-04 7:55 ` John Zhou
0 siblings, 0 replies; 2+ messages in thread
From: John Zhou @ 2003-09-04 7:55 UTC (permalink / raw)
To: 'Chris Simmonds'; +Cc: linuxppc-embedded
Have you config SIEXR, SIU external interrupt comtrol register, which edge detect mode you used ? Low assertion or High to low change to generate an interrupt?
John Zhou
-----Original Message-----
From: owner-linuxppc-embedded@lists.linuxppc.org
[mailto:owner-linuxppc-embedded@lists.linuxppc.org]On Behalf Of Chris
Simmonds
Sent: Tuesday, September 02, 2003 11:31 PM
To: linuxppc-embedded@lists.linuxppc.org
Subject: IRQ0 handler
Hi,
Can anybody tell me how to install a handler for irq0 on an 8xx
platform? Doing the obvious (request_8xxirq (SIU_IRQ0 ...)) doesn't seem
to work. It seems that I need to modify head_8xx.S so that the excption
handler for 0x100 is do_IRQ instead of UnKnownException. I tried the
patch below, but now I get a Software Emulation trap (0x1000). Any help
gratefully accepted.
Chris.
/* System reset */
#ifdef CONFIG_SMP /* MVME/MTX start the secondary here */
STD_EXCEPTION(0x100, Reset, __secondary_start_psurge)
#else
/****
Replace norrmal NMI handler with do_IRQ
STD_EXCEPTION(0x100, Reset, UnknownException)
****/
NMI_Interrupt:
EXCEPTION_PROLOG;
addi r3,r1,STACK_FRAME_OVERHEAD
li r20,MSR_KERNEL
li r4,0
bl transfer_to_handler
.long do_IRQ;
.long ret_from_intercept
#endif
--
Chris Simmonds 2net Limited
chris@2net.co.uk http://www.2net.co.uk/
Tel: +44 (0)1962 869003 Fax: +44 (0)870 056 7556
"If it's not connected, it's not effective"(tm)
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 2+ messages in thread
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