• Paul Walmsley's avatar
    OMAP2/3: SRAM: add comment about crashes during a TLB miss · 1124d2f9
    Paul Walmsley authored
    Some users were observing crashes during the execution of CORE DVFS
    code from OCM RAM -- a locally-modified copy of the linux-omap code.
    Richard Woodruff tracked this down to a DTLB miss which had been
    inadvertently and intermittently caused by the local modifications.
    (The TLB miss caused the ARM MMU to attempt to walk the page tables
    stored in SDRAM, which was not possible since SDRAM is off-line for a
    portion of the CORE DVFS OCM RAM code.)
    
    Add a note to the OMAP2 & OMAP3 CORE DVFS SRAM code to warn others that
    changes may result in crashes here if they are not carefully tested.
    Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
    Cc: Richard Woodruff <r-woodruff2@ti.com>
    Cc: Jon Hunter <jon-hunter@ti.com>
    Cc: Nishanth Menon <nm@ti.com>
    1124d2f9
sram242x.S 10.3 KB