From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-wg0-f45.google.com ([74.125.82.45]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1U4aFl-0008JI-5q for barebox@lists.infradead.org; Sun, 10 Feb 2013 16:59:46 +0000 Received: by mail-wg0-f45.google.com with SMTP id dq12so4284226wgb.24 for ; Sun, 10 Feb 2013 08:59:42 -0800 (PST) From: Vicente Bergas Date: Sun, 10 Feb 2013 17:58:56 +0100 Message-Id: <1360515537-1703-2-git-send-email-vicencb@gmail.com> In-Reply-To: <1360515537-1703-1-git-send-email-vicencb@gmail.com> References: <1360515537-1703-1-git-send-email-vicencb@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 1/2] DeviceTree: add support for initrd in the DT To: barebox@lists.infradead.org Cc: Vicente Bergas Add the initrd start and end address to the DT, code comes from u-boot. Signed-off-by: Vicente Bergas --- arch/arm/lib/armlinux.c | 2 ++ common/oftree.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++ include/of.h | 1 + 3 files changed, 69 insertions(+) diff --git a/arch/arm/lib/armlinux.c b/arch/arm/lib/armlinux.c index 40a63ea..8052ca4 100644 --- a/arch/arm/lib/armlinux.c +++ b/arch/arm/lib/armlinux.c @@ -266,6 +266,8 @@ void start_linux(void *adr, int swap, unsigned long initrd_address, if (oftree) { printf("booting Linux kernel with devicetree\n"); + fdt_initrd(oftree, initrd_address, + initrd_address+initrd_size, 1); params = oftree; } else { setup_tags(initrd_address, initrd_size, swap); diff --git a/common/oftree.c b/common/oftree.c index 0df5209..7c118d2 100644 --- a/common/oftree.c +++ b/common/oftree.c @@ -246,6 +246,72 @@ int fdt_get_path_or_create(struct fdt_header *fdt, const char *path) return nodeoffset; } +int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force) +{ + int nodeoffset; + int err, j, total; + u32 tmp; + const char *path; + uint64_t addr, size; + + /* Find the "chosen" node */ + nodeoffset = fdt_path_offset(fdt, "/chosen"); + + /* If there is no "chosen" node in the blob return */ + if (nodeoffset < 0) { + printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset)); + return nodeoffset; + } + + /* just return if initrd_start/end aren't valid */ + if ((initrd_start == 0) || (initrd_end == 0)) + return 0; + + total = fdt_num_mem_rsv(fdt); + + /* + * Look for an existing entry and update it. If we don't find + * the entry, we will j be the next available slot. + */ + for (j = 0; j < total; j++) { + err = fdt_get_mem_rsv(fdt, j, &addr, &size); + if (addr == initrd_start) { + fdt_del_mem_rsv(fdt, j); + break; + } + } + + err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); + if (err < 0) { + printf("fdt_initrd: %s\n", fdt_strerror(err)); + return err; + } + + path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL); + if (!path || force) { + tmp = __cpu_to_be32(initrd_start); + err = fdt_setprop(fdt, nodeoffset, + "linux,initrd-start", &tmp, sizeof(tmp)); + if (err < 0) { + printf("WARNING: " + "could not set linux,initrd-start %s.\n", + fdt_strerror(err)); + return err; + } + tmp = __cpu_to_be32(initrd_end); + err = fdt_setprop(fdt, nodeoffset, + "linux,initrd-end", &tmp, sizeof(tmp)); + if (err < 0) { + printf("WARNING: could not set linux,initrd-end %s.\n", + fdt_strerror(err)); + + return err; + } + } + + return 0; +} + static int of_fixup_bootargs(struct fdt_header *fdt) { int nodeoffset; diff --git a/include/of.h b/include/of.h index d3a310f..dcb4c4b 100644 --- a/include/of.h +++ b/include/of.h @@ -18,6 +18,7 @@ void do_fixup_by_path(struct fdt_header *fdt, const char *path, const char *prop void do_fixup_by_path_u32(struct fdt_header *fdt, const char *path, const char *prop, u32 val, int create); int fdt_get_path_or_create(struct fdt_header *fdt, const char *path); +int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force); #define OF_BAD_ADDR ((u64)-1) -- 1.8.1.3 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox