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| author | Gilad Ben-Yossef <gilad@benyossef.com> | 2013-01-22 16:48:45 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-02-15 23:16:11 +0530 |
| commit | 4368902bb90f0e208387f336c3fce0e6b2a110fc (patch) | |
| tree | 70d3927c8cd38e32a969ea340ec370ebeb16f30c /arch/arc/include/asm/io.h | |
| parent | 8c2f4a8dd0e0fc9dcaf14c768544039eddfa7375 (diff) | |
| download | linux-4368902bb90f0e208387f336c3fce0e6b2a110fc.tar.bz2 | |
ARC: Add support for ioremap_prot API
Implement ioremap_prot() to allow mapping IO memory with variable
protection
via TLB.
Implementing this allows the /dev/mem driver to use its generic access()
VMA callback, which in turn allows ptrace to examine data in memory
mapped regions mapped via /dev/mem, such as Arc DCCM.
The end result is that it is possible to examine values of variables
placed into DCCM in user space programs via GDB.
CC: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
CC: Noam Camus <noamc@ezchip.com>
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/include/asm/io.h')
| -rw-r--r-- | arch/arc/include/asm/io.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h index d20051bbbf02..473424d7528b 100644 --- a/arch/arc/include/asm/io.h +++ b/arch/arc/include/asm/io.h @@ -16,6 +16,8 @@ #define PCI_IOBASE ((void __iomem *)0) extern void __iomem *ioremap(unsigned long physaddr, unsigned long size); +extern void __iomem *ioremap_prot(phys_addr_t offset, unsigned long size, + unsigned long flags); extern void iounmap(const void __iomem *addr); #define ioremap_nocache(phy, sz) ioremap(phy, sz) |