diff options
Diffstat (limited to 'arch/blackfin/mach-common/interrupt.S')
| -rw-r--r-- | arch/blackfin/mach-common/interrupt.S | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/blackfin/mach-common/interrupt.S b/arch/blackfin/mach-common/interrupt.S index 0069c2dd462..9c46680186e 100644 --- a/arch/blackfin/mach-common/interrupt.S +++ b/arch/blackfin/mach-common/interrupt.S @@ -145,6 +145,14 @@ __common_int_entry: /* interrupt routine for ivhw - 5 */ ENTRY(_evt_ivhw) + /* In case a single action kicks off multiple memory transactions, (like + * a cache line fetch, - this can cause multiple hardware errors, let's + * catch them all. First - make sure all the actions are complete, and + * the core sees the hardware errors. + */ + SSYNC; + SSYNC; + SAVE_ALL_SYS #ifdef CONFIG_FRAME_POINTER fp = 0; @@ -159,6 +167,25 @@ ENTRY(_evt_ivhw) 1: #endif + /* Handle all stacked hardware errors + * To make sure we don't hang forever, only do it 10 times + */ + R0 = 0; + R2 = 10; +1: + P0.L = LO(ILAT); + P0.H = HI(ILAT); + R1 = [P0]; + CC = BITTST(R1, EVT_IVHW_P); + IF ! CC JUMP 2f; + /* OK a hardware error is pending - clear it */ + R1 = EVT_IVHW_P; + [P0] = R1; + R0 += 1; + CC = R1 == R2; + if CC JUMP 2f; + JUMP 1b; +2: # We are going to dump something out, so make sure we print IPEND properly p2.l = lo(IPEND); p2.h = hi(IPEND); |