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authorRobin Holt <holt@sgi.com>2009-12-16 03:47:55 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-16 18:20:13 +0300
commit289750d1f1fd4a715baa2a2c6dd0cec2b8317fd7 (patch)
tree2c525297c460a9ab98b9649eb3021e534a8e77fd /drivers/misc/sgi-gru/grukservices.h
parentfae419f2abd15ab7d1cd1413e6683a276a4e14e2 (diff)
downloadlinux-289750d1f1fd4a715baa2a2c6dd0cec2b8317fd7.tar.xz
X86: uv: implement a gru_read_gpa kernel function
The BIOS has decided to store a pointer to the partition reserved page in a scratch MMR. The GRU is only able to read an MMR using a vload instruction. The gru_read_gpa() function will implemented. Signed-off-by: Robin Holt <holt@sgi.com> Signed-off-by: Jack Steiner <steiner@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-gru/grukservices.h')
-rw-r--r--drivers/misc/sgi-gru/grukservices.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/misc/sgi-gru/grukservices.h b/drivers/misc/sgi-gru/grukservices.h
index d60d34bca44d..02aa94d8484a 100644
--- a/drivers/misc/sgi-gru/grukservices.h
+++ b/drivers/misc/sgi-gru/grukservices.h
@@ -131,6 +131,20 @@ extern void *gru_get_next_message(struct gru_message_queue_desc *mqd);
/*
+ * Read a GRU global GPA. Source can be located in a remote partition.
+ *
+ * Input:
+ * value memory address where MMR value is returned
+ * gpa source numalink physical address of GPA
+ *
+ * Output:
+ * 0 OK
+ * >0 error
+ */
+int gru_read_gpa(unsigned long *value, unsigned long gpa);
+
+
+/*
* Copy data using the GRU. Source or destination can be located in a remote
* partition.
*