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powerpc: add pgprot_cached_noncoherent()

Message ID 1319720325-5169-1-git-send-email-geoff@geoffthorpe.net (mailing list archive)
State Accepted, archived
Commit 09c188c4f6b331dbb61a2b5bd05d4c89c733fe33
Delegated to: Benjamin Herrenschmidt
Headers show

Commit Message

Geoff Thorpe Oct. 27, 2011, 12:58 p.m. UTC 
This adds a pgprot combination required by some cache-enabled IO device
mappings, such as Freescale datapath (QMan and BMan) portals.

Signed-off-by: Geoff Thorpe <geoff@geoffthorpe.net>
---
 arch/powerpc/include/asm/pgtable.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
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Patch

diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index 88b0bd9..2e0e411 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -170,6 +170,9 @@  extern int ptep_set_access_flags(struct vm_area_struct *vma, unsigned long addre
 #define pgprot_cached_wthru(prot) (__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) | \
 				            _PAGE_COHERENT | _PAGE_WRITETHRU))
 
+#define pgprot_cached_noncoherent(prot) \
+		(__pgprot(pgprot_val(prot) & ~_PAGE_CACHE_CTL))
+
 #define pgprot_writecombine pgprot_noncached_wc
 
 struct file;