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From: bugzilla-daemon@bugs.ecos.sourceware.org
To: unassigned@bugs.ecos.sourceware.org
Subject: [Bug 1002061] New: Freescale eDMA library macro FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() fails with negative offset.
Date: Wed, 29 Apr 2015 13:27:00 -0000	[thread overview]
Message-ID: <bug-1002061-777@http.bugs.ecos.sourceware.org/> (raw)

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http://bugs.ecos.sourceware.org/show_bug.cgi?id=1002061

            Bug ID: 1002061
           Summary: Freescale eDMA library macro
                    FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() fails with
                    negative offset.
           Product: eCos
           Version: CVS
            Target: freescale_twr_k70f120m (Freescale Kinetis TWR-K70F120M
                    board)
  Architecture/Host All
                OS:
            Status: NEW
          Severity: enhancement
          Priority: low
         Component: HAL
          Assignee: unassigned@bugs.ecos.sourceware.org
          Reporter: ilijak@siva.com.mk
                CC: ecos-bugs@ecos.sourceware.org

Created attachment 2589
  --> http://bugs.ecos.sourceware.org/attachment.cgi?id=2589&action=edit
Patch for freescale_edma.h - mask-off unwanted birs.

Freescale eDMA library macro FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF()fails when
offset is negative.
The reason: The ofset field is 20 bit long, so signe extended negative number
has extra leading 1s that polute register bits out of offset boundaries.

The attached patch masks off bits out of offset field boundaries.

Ilija

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             reply	other threads:[~2015-04-29 13:27 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-29 13:27 bugzilla-daemon [this message]
  -- strict thread matches above, loose matches on Subject: below --
2015-04-29 13:27 bugzilla-daemon

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