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authorMark Nutter <mnutter@us.ibm.com>2006-03-22 18:00:12 -0500
committerPaul Mackerras <paulus@samba.org>2006-03-26 22:48:28 -0500
commit6df10a82f8de89c66eb91c371d62d76e87b2cbba (patch)
treee8615f4c00a44f4e4a609d59c51e958f0300526b /include/asm-powerpc/spu.h
parenta33a7d7309d79656bc19a0e96fc4547a1633283e (diff)
[PATCH] spufs: enable SPE problem state MMIO access.
This patch is layered on top of CONFIG_SPARSEMEM and is patterned after direct mapping of LS. This patch allows mmap() of the following regions: "mfc", which represents the area from [0x3000 - 0x3fff]; "cntl", which represents the area from [0x4000 - 0x4fff]; "signal1" which begins at offset 0x14000; "signal2" which begins at offset 0x1c000. The signal1 & signal2 files may be mmap()'d by regular user processes. The cntl and mfc file, on the other hand, may only be accessed if the owning process has CAP_SYS_RAWIO, because they have the potential to confuse the kernel with regard to parallel access to the same files with regular file operations: the kernel always holds a spinlock when accessing registers in these areas to serialize them, which can not be guaranteed with user mmaps, Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc/spu.h')
-rw-r--r--include/asm-powerpc/spu.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-powerpc/spu.h b/include/asm-powerpc/spu.h
index 8564b8234069..f431d8b0b651 100644
--- a/include/asm-powerpc/spu.h
+++ b/include/asm-powerpc/spu.h
@@ -110,6 +110,7 @@ struct spu {
110 char *name; 110 char *name;
111 unsigned long local_store_phys; 111 unsigned long local_store_phys;
112 u8 *local_store; 112 u8 *local_store;
113 unsigned long problem_phys;
113 struct spu_problem __iomem *problem; 114 struct spu_problem __iomem *problem;
114 struct spu_priv1 __iomem *priv1; 115 struct spu_priv1 __iomem *priv1;
115 struct spu_priv2 __iomem *priv2; 116 struct spu_priv2 __iomem *priv2;