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From: "Edgar E. Iglesias" <edgar.iglesias@gmail.com>
To: xen-devel@lists.xen.org
Cc: edgar.iglesias@xilinx.com, julien.grall@arm.com, sstabellini@kernel.org
Subject: [RFC for-4.8 v2 6/7] xen/device-tree: Add an mmio-sram bus
Date: Fri,  3 Jun 2016 15:29:11 +0200	[thread overview]
Message-ID: <1464960552-6645-7-git-send-email-edgar.iglesias@gmail.com> (raw)
In-Reply-To: <1464960552-6645-1-git-send-email-edgar.iglesias@gmail.com>

From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>

Add an mmio-sram bus that prevents sram sub areas from
being re-mapped. These sub-areas describe allocations and
not mappings.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
 xen/common/device_tree.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c
index fbee354..698d4da 100644
--- a/xen/common/device_tree.c
+++ b/xen/common/device_tree.c
@@ -616,10 +616,47 @@ static int dt_bus_pci_translate(__be32 *addr, u64 offset, int na)
 }
 
 /*
+ * MMIO-SRAM bus specific translator
+ */
+
+static bool_t dt_bus_mmio_sram_match(const struct dt_device_node *np)
+{
+    static const struct dt_device_match match[] __initconst =
+    {
+        DT_MATCH_COMPATIBLE("mmio-sram"),
+        { /* sentinel */ },
+    };
+
+    return dt_match_node(match, np) != NULL;
+}
+
+static void dt_bus_mmio_sram_count_cells(const struct dt_device_node *np,
+					 int *addrc, int *sizec)
+{
+    /*
+     * Child areas describe allocations, not mappings. Don't map anything.
+     */
+    if (addrc)
+        *addrc = 0;
+    if (sizec)
+        *sizec = 0;
+}
+
+/*
  * Array of bus specific translators
  */
 static const struct dt_bus dt_busses[] =
 {
+    /* MMIO-SRAM */
+    {
+        .name = "mmio-sram",
+        .addresses = "reg",
+        .match = dt_bus_mmio_sram_match,
+        .count_cells = dt_bus_mmio_sram_count_cells,
+        .map = dt_bus_default_map,
+        .translate = dt_bus_default_translate,
+        .get_flags = dt_bus_default_get_flags,
+    },
     /* PCI */
     {
         .name = "pci",
-- 
2.5.0


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  parent reply	other threads:[~2016-06-03 13:29 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-03 13:29 [RFC for-4.8 v2 0/7] xen/arm: Add support for mapping mmio-sram nodes into dom0 Edgar E. Iglesias
2016-06-03 13:29 ` [RFC for-4.8 v2 1/7] xen/arm: Add MATTR_MEM_NC for normal non-cacheable memory Edgar E. Iglesias
2016-06-06 17:23   ` Julien Grall
2016-06-07 20:34     ` Edgar E. Iglesias
2016-06-03 13:29 ` [RFC for-4.8 v2 2/7] xen/arm: Rename and generalize un/map_regions_rw_cache Edgar E. Iglesias
2016-06-06 17:55   ` Julien Grall
2016-06-07 20:55     ` Edgar E. Iglesias
2016-06-03 13:29 ` [RFC for-4.8 v2 3/7] xen/device-tree: Add __DT_MATCH macros without braces Edgar E. Iglesias
2016-06-06 17:36   ` Julien Grall
2016-06-03 13:29 ` [RFC for-4.8 v2 4/7] xen/device-tree: Make dt_match_node match props Edgar E. Iglesias
2016-06-06 17:39   ` Julien Grall
2016-06-07 20:43     ` Edgar E. Iglesias
2016-06-08  8:44       ` Julien Grall
2016-06-09 16:04         ` Edgar E. Iglesias
2016-06-09 16:23           ` Julien Grall
2016-06-09 16:30             ` Edgar E. Iglesias
2016-06-03 13:29 ` [RFC for-4.8 v2 5/7] xen/arm: domain_build: Plumb for different mapping attributes Edgar E. Iglesias
2016-06-06 18:00   ` Julien Grall
2016-06-03 13:29 ` Edgar E. Iglesias [this message]
2016-06-06 18:05   ` [RFC for-4.8 v2 6/7] xen/device-tree: Add an mmio-sram bus Julien Grall
2016-06-08  0:21     ` Edgar E. Iglesias
2016-06-08  8:52       ` Julien Grall
2016-06-03 13:29 ` [RFC for-4.8 v2 7/7] xen/arm: Map mmio-sram nodes as normal un-cached rwx memory Edgar E. Iglesias
2016-06-06 18:08   ` Julien Grall

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