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 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
next prev 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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