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[81.231.233.234]) by smtp.gmail.com with ESMTPSA id d5sm5772321wje.20.2016.06.03.06.29.48 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 03 Jun 2016 06:29:49 -0700 (PDT) From: "Edgar E. Iglesias" To: xen-devel@lists.xen.org Date: Fri, 3 Jun 2016 15:29:11 +0200 Message-Id: <1464960552-6645-7-git-send-email-edgar.iglesias@gmail.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1464960552-6645-1-git-send-email-edgar.iglesias@gmail.com> References: <1464960552-6645-1-git-send-email-edgar.iglesias@gmail.com> Cc: edgar.iglesias@xilinx.com, julien.grall@arm.com, sstabellini@kernel.org Subject: [Xen-devel] [RFC for-4.8 v2 6/7] xen/device-tree: Add an mmio-sram bus X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: "Edgar E. Iglesias" 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 --- 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",