+Cris +Stanley Loop in DSP guys in case they would have something to add. > -----Original Message----- > From: Felipe Contreras [mailto:felipe.contre...@gmail.com] > Sent: Sunday, May 16, 2010 10:46 AM > To: linux-omap > Cc: Ramirez Luna, Omar; Guzman Lugo, Fernando; Felipe Contreras > Subject: [PATCH 07/14] dspbridge: deh: ensure only tlb #0 is enabled > > We don't want the DSP to continue writing into other mapped pages, no > matter how unlikely. > > Based on extensive discussion with Fernando Guzman Lugo. > > Signed-off-by: Felipe Contreras <felipe.contre...@gmail.com> > --- > drivers/dsp/bridge/core/ue_deh.c | 8 ++++++++ > 1 files changed, 8 insertions(+), 0 deletions(-) > > diff --git a/drivers/dsp/bridge/core/ue_deh.c > b/drivers/dsp/bridge/core/ue_deh.c > index 61e5e4e..f661aaf 100644 > --- a/drivers/dsp/bridge/core/ue_deh.c > +++ b/drivers/dsp/bridge/core/ue_deh.c > @@ -235,6 +235,14 @@ void bridge_deh_notify(struct deh_mgr *deh_mgr, u32 > ulEventMask, u32 dwErrInfo) > print_dsp_trace_buffer(dev_context); > dump_dl_modules(dev_context); > > + /* > + * Before acking the MMU fault, let's make sure MMU can only > + * access entry #0. Then add a new entry so that the DSP OS > + * can continue in order to dump the stack. > + */ > + hw_mmu_twl_disable(resources->dw_dmmu_base); > + hw_mmu_tlb_flush_all(resources->dw_dmmu_base); > + > hw_mmu_tlb_add(resources->dw_dmmu_base, > virt_to_phys(dummy_va_addr), fault_addr, > HW_PAGE_SIZE4KB, 1, > -- > 1.7.1
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