[07/14] dspbridge: deh: ensure only tlb #0 is enabled
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Message ID 1274024765-21076-8-git-send-email-felipe.contreras@gmail.com
State Under Review, archived
Delegated to:
Headers show

Commit Message

Felipe Contreras May 16, 2010, 3:45 p.m. UTC
None

Patch
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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,