CVS commit: src/sys/arch/powerpc/ibm4xx

["Rin Okuyama" <rin%netbsd.org@localhost>]

Module Name:    src
Committed By:   rin
Date:           Fri Mar  5 05:35:50 UTC 2021

Modified Files:
        src/sys/arch/powerpc/ibm4xx: pic_uic.c

Log Message:
Fix hard freeze in pic_handle_intr() for PPC_IBM403.

Not clearly documented in reference manual, but DCR_EXISR register is
not updated immediately after some bits are cleared by mtdcr, no matter
whether sync (= eieio) and/or isync are issued.

Therefore, we have to manage our own status mask in the interrupt handler.
This is what we did in obsoleted powerpc/ibm4xx/intr.c.

With this change, my Explora 451 works just fine with serial console!
Fix for framebuffer console will be committed soon.


To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.9 src/sys/arch/powerpc/ibm4xx/pic_uic.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.