Re: powerpc/pic/intr.c IPL_HIGH vs IPL_NONE

[KIYOHARA Takashi <kiyohara%kk.iij4u.or.jp@localhost>]

Hi! Frank,


From: Frank Wille <frank%phoenix.owl.de@localhost>
Date: Fri, 4 Jan 2013 11:44:17 +0100

> So the interrupt for a cascaded PIC should always be established with
> IPL_HIGH instead of IPL_NONE?
> 
> We would have to change that in a few locations:
> 
> bebox/bebox/machdep.c:  intr_establish(16 + 26, IST_LEVEL, IPL_NONE, 
> pic_handle_intr, isa_pic);
> evbppc/ev64260/gt_mainbus.c:    intr_establish(IRQ_GPP7_0, IST_LEVEL, 
> IPL_NONE,
> evbppc/ev64260/gt_mainbus.c:    intr_establish(IRQ_GPP15_8, IST_LEVEL, 
> IPL_NONE,
> evbppc/ev64260/gt_mainbus.c:    intr_establish(IRQ_GPP23_16, IST_LEVEL, 
> IPL_NONE,
> evbppc/ev64260/gt_mainbus.c:    intr_establish(IRQ_GPP31_24, IST_LEVEL, 
> IPL_NONE,
> macppc/macppc/pic_ohare.c:      intr_establish(irq, IST_LEVEL, IPL_NONE, 
> pic_handle_intr, pic);
> ofppc/ofppc/mainbus.c:          intr_establish(16, IST_LEVEL, IPL_NONE, 
> pic_handle_intr,
> powerpc/ibm4xx/pic_uic.c:       intr_establish(30, IST_LEVEL, IPL_NONE, 
> pic_handle_intr, &pic_uic1);
> powerpc/ibm4xx/pic_uic.c:       intr_establish(28, IST_LEVEL, IPL_NONE, 
> pic_handle_intr, &pic_uic2);
> prep/prep/machdep.c:            intr_establish(16, IST_LEVEL, IPL_NONE, 
> pic_handle_intr,
> sandpoint/sandpoint/machdep.c:  intr_establish(16, IST_LEVEL, IPL_NONE, 
> pic_handle_intr, isa_pic);
> 
> @kiyohara: Did you already verify that it works for BeBox?

I tested with attached patch.  It is OK.

Thanks,
--
kiyohara

Index: machdep.c
===================================================================
RCS file: /cvsroot/src/sys/arch/bebox/bebox/machdep.c,v
retrieving revision 1.106
diff -u -r1.106 machdep.c
--- machdep.c   13 Oct 2012 17:58:54 -0000      1.106
+++ machdep.c   7 Jan 2013 11:11:17 -0000
@@ -164,7 +164,7 @@
        /*
         * set up i8259 as a cascade on BeInterruptController irq 26.
         */
-       intr_establish(16 + 26, IST_LEVEL, IPL_NONE, pic_handle_intr, isa_pic);
+       intr_establish(16 + 26, IST_LEVEL, IPL_HIGH, pic_handle_intr, isa_pic);
 
        oea_install_extint(pic_ext_intr);