diff options
| author | Varun Sethi <Varun.Sethi@freescale.com> | 2014-03-09 18:33:16 (GMT) |
|---|---|---|
| committer | Jose Rivera <German.Rivera@freescale.com> | 2014-03-18 18:38:46 (GMT) |
| commit | 5231ff739a8628bb8301aa9502b1d26ec6c19f7e (patch) | |
| tree | e9eba14f74c91a5dec11b0ad8904448a8d929506 /drivers/iommu | |
| parent | 5a4763edff47f6c1b5547b0e0c66cd529cee9160 (diff) | |
| download | linux-fsl-qoriq-5231ff739a8628bb8301aa9502b1d26ec6c19f7e.tar.xz | |
iommu/fsl: Enable OMT cache, before invalidating PAACT and SPAACT cache.
Enable OMT cache, before invalidating PAACT and SPAACT cache. This
is a PAMU hardware errata work around.
Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
Change-Id: Iecf8dfcbf0ccc535dff4825a046b2badc660ec8b
Reviewed-on: http://git.am.freescale.net:8181/9619
Tested-by: Review Code-CDREVIEW <CDREVIEW@freescale.com>
Reviewed-by: Stuart Yoder <stuart.yoder@freescale.com>
Reviewed-by: Jose Rivera <German.Rivera@freescale.com>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/fsl_pamu.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/iommu/fsl_pamu.c b/drivers/iommu/fsl_pamu.c index ecf260c..e7778c6 100644 --- a/drivers/iommu/fsl_pamu.c +++ b/drivers/iommu/fsl_pamu.c @@ -814,6 +814,16 @@ int setup_one_pamu(unsigned long pamu_reg_base, unsigned long pamu_reg_size, pamu_regs = (struct pamu_mmap_regs *) (pamu_reg_base + PAMU_MMAP_REGS_BASE); + /* + * As per PAMU errata A-005982, writing the PAACT and SPAACT + * base address registers wouldn't invalidate the corresponding + * caches if the OMT cache is disabled. The workaround is to + * enable the OMT cache before setting the base registers. + * This can be done without actually enabling PAMU. + */ + + out_be32(pc, PAMU_PC_OCE); + /* set up pointers to corenet control blocks */ out_be32(&pamu_regs->ppbah, upper_32_bits(ppaact_phys)); |