linux-kernel - [PATCH 4/4] sgi-xp: support getting the address of a partition's reserved page

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Date:	Tue, 21 Oct 2008 16:25:35 -0500
From:	Dean Nelson <dcn@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] sgi-xp: support getting the address of a partition's reserved page

Add support for getting the address of a partition's reserved page.

Signed-off-by: Dean Nelson <dcn@....com>

---

 drivers/misc/sgi-xp/xpc_uv.c |   31 ++++++++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

Index: linux/drivers/misc/sgi-xp/xpc_uv.c
===================================================================
--- linux.orig/drivers/misc/sgi-xp/xpc_uv.c	2008-10-21 12:50:18.000000000 -0500
+++ linux/drivers/misc/sgi-xp/xpc_uv.c	2008-10-21 14:00:13.000000000 -0500
@@ -642,7 +642,7 @@ xpc_send_local_activate_IRQ_uv(struct xp
 	struct xpc_partition_uv *part_uv = &part->sn.uv;
 
 	/*
-	 * !!! Make our side think that the remote parition sent an activate
+	 * !!! Make our side think that the remote partition sent an activate
 	 * !!! message our way by doing what the activate IRQ handler would
 	 * !!! do had one really been sent.
 	 */
@@ -660,8 +660,33 @@ static enum xp_retval
 xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa,
 				  size_t *len)
 {
-	/* !!! call the UV version of sn_partition_reserved_page_pa() */
-	return xpUnsupported;
+	s64 status;
+	enum xp_retval ret;
+
+#if defined CONFIG_X86_64
+	status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa,
+					  (u64 *)len);
+	if (status == BIOS_STATUS_SUCCESS)
+		ret = xpSuccess;
+	else if (status == BIOS_STATUS_MORE_PASSES)
+		ret = xpNeedMoreInfo;
+	else
+		ret = xpBiosError;
+
+#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+	status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len);
+	if (status == SALRET_OK)
+		ret = xpSuccess;
+	else if (status == SALRET_MORE_PASSES)
+		ret = xpNeedMoreInfo;
+	else
+		ret = xpSalError;
+
+#else
+	#error not a supported configuration
+#endif
+
+	return ret;
 }
 
 static int
--
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