From ccaa5747bdeae4261199dd7e80771e4de1c550ca Mon Sep 17 00:00:00 2001 From: Etienne Carriere Date: Thu, 10 Sep 2020 10:49:59 +0200 Subject: fdtdec: optionally add property no-map to created reserved memory node Add boolean input argument @no_map to helper function fdtdec_add_reserved_memory() to add or not "no-map" property for an added reserved memory node. Property no-map is used by the Linux kernel to not not map memory in its static memory mapping. It is needed for example for the| consistency of system non-cached memory and to prevent speculative accesses to some firewalled memory. No functional change. A later change will update to OPTEE library to add no-map property to OP-TEE reserved memory nodes. Signed-off-by: Etienne Carriere Signed-off-by: Patrice Chotard Reviewed-by: Simon Glass --- include/fdtdec.h | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/fdtdec.h b/include/fdtdec.h index 152eb07b9e0..62d16609732 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -1029,7 +1029,7 @@ static inline int fdtdec_set_phandle(void *blob, int node, uint32_t phandle) * }; * uint32_t phandle; * - * fdtdec_add_reserved_memory(fdt, "framebuffer", &fb, &phandle); + * fdtdec_add_reserved_memory(fdt, "framebuffer", &fb, &phandle, false); * * This results in the following subnode being added to the top-level * /reserved-memory node: @@ -1056,11 +1056,12 @@ static inline int fdtdec_set_phandle(void *blob, int node, uint32_t phandle) * @param carveout information about the carveout region * @param phandlep return location for the phandle of the carveout region * can be NULL if no phandle should be added + * @param no_map add "no-map" property if true * @return 0 on success or a negative error code on failure */ int fdtdec_add_reserved_memory(void *blob, const char *basename, const struct fdt_memory *carveout, - uint32_t *phandlep); + uint32_t *phandlep, bool no_map); /** * fdtdec_get_carveout() - reads a carveout from an FDT -- cgit v1.2.3