From mboxrd@z Thu Jan 1 00:00:00 1970 From: Igor Opaniuk Date: Tue, 3 Dec 2019 14:04:45 +0200 Subject: [PATCH v2 0/2] android: colibri_imx7: reserve DDR memory for Cortex-M4 Message-ID: <20191203120447.24820-1-igor.opaniuk@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de i.MX 7's Cortex-M4 core can run from DDR and uses DDR memory for the rpmsg communication. Both use cases need a fixed location of memory reserved. For the rpmsg use case the reserved area needs to be in sync with the kernel's hardcoded vring descriptor location. Introduce support for adding linux,usable-memory property to carve out 1MB of memory in case the M4 core is running. Also make sure that the i.MX 7 specific rpmsg driver does not get loaded in case we do not carve out memory. v2: - fixed build where CONFIG_ARCH_FIXUP_FDT_MEMORY is not set. Igor Opaniuk (2): common: fdt_support: add support for setting usable memory board: colibri_imx7: reserve DDR memory for Cortex-M4 arch/arm/include/asm/mach-imx/sys_proto.h | 2 ++ board/toradex/colibri_imx7/colibri_imx7.c | 37 +++++++++++++++++++++++ common/fdt_support.c | 35 +++++++++++++++++++++ include/fdt_support.h | 1 + 4 files changed, 75 insertions(+) -- 2.17.1