fdtdec: Support reserved-memory flags

Reserved memory nodes can have additional flags. Support reading and
writing these flags to ensure that reserved memory nodes can be properly
parsed and emitted.

This converts support for the existing "no-map" flag to avoid extending
the argument list for fdtdec_add_reserved_memory() to excessive length.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

3 files changed, 22 insertions, 13 deletions

diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index a0ecc72..ad090ea 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -1294,7 +1294,7 @@ static int fdtdec_init_reserved_memory(void *blob)
 int fdtdec_add_reserved_memory(void *blob, const char *basename,
 			       const struct fdt_memory *carveout,
 			       const char **compatibles, unsigned int count,
-			       uint32_t *phandlep, bool no_map)
+			       uint32_t *phandlep, unsigned long flags)
 {
 	fdt32_t cells[4] = {}, *ptr = cells;
 	uint32_t upper, lower, phandle;
@@ -1364,6 +1364,12 @@ int fdtdec_add_reserved_memory(void *blob, const char *basename,
 	if (node < 0)
 		return node;
 
+	if (flags & FDTDEC_RESERVED_MEMORY_NO_MAP) {
+		err = fdt_setprop(blob, node, "no-map", NULL, 0);
+		if (err < 0)
+			return err;
+	}
+
 	if (phandlep) {
 		err = fdt_generate_phandle(blob, &phandle);
 		if (err < 0)
@@ -1394,12 +1400,6 @@ int fdtdec_add_reserved_memory(void *blob, const char *basename,
 	if (err < 0)
 		return err;
 
-	if (no_map) {
-		err = fdt_setprop(blob, node, "no-map", NULL, 0);
-		if (err < 0)
-			return err;
-	}
-
 	if (compatibles && count > 0) {
 		size_t length = 0, len = 0;
 		unsigned int i;
@@ -1432,7 +1432,8 @@ int fdtdec_add_reserved_memory(void *blob, const char *basename,
 int fdtdec_get_carveout(const void *blob, const char *node,
 			const char *prop_name, unsigned int index,
 			struct fdt_memory *carveout, const char **name,
-			const char ***compatiblesp, unsigned int *countp)
+			const char ***compatiblesp, unsigned int *countp,
+			unsigned long *flags)
 {
 	const fdt32_t *prop;
 	uint32_t phandle;
@@ -1519,13 +1520,20 @@ skip_compat:
 
 	carveout->end = carveout->start + size - 1;
 
+	if (flags) {
+		*flags = 0;
+
+		if (fdtdec_get_bool(blob, offset, "no-map"))
+			*flags |= FDTDEC_RESERVED_MEMORY_NO_MAP;
+	}
+
 	return 0;
 }
 
 int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name,
 			unsigned int index, const struct fdt_memory *carveout,
 			const char *name, const char **compatibles,
-			unsigned int count)
+			unsigned int count, unsigned long flags)
 {
 	uint32_t phandle;
 	int err, offset, len;
@@ -1533,7 +1541,7 @@ int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name,
 	void *prop;
 
 	err = fdtdec_add_reserved_memory(blob, name, carveout, compatibles,
-					 count, &phandle, false);
+					 count, &phandle, flags);
 	if (err < 0) {
 		debug("failed to add reserved memory: %d\n", err);
 		return err;
diff --git a/lib/fdtdec_test.c b/lib/fdtdec_test.c
index 3af9fb5..85351c7 100644
--- a/lib/fdtdec_test.c
+++ b/lib/fdtdec_test.c
@@ -190,7 +190,7 @@ static int make_fdt_carveout_device(void *fdt, uint32_t na, uint32_t ns)
 	CHECK(fdt_setprop(fdt, offset, "reg", cells, (na + ns) * sizeof(*cells)));
 
 	return fdtdec_set_carveout(fdt, name, "memory-region", 0, &carveout,
-				   "framebuffer", NULL, 0);
+				   "framebuffer", NULL, 0, 0);
 }
 
 static int check_fdt_carveout(void *fdt, uint32_t address_cells,
@@ -215,7 +215,7 @@ static int check_fdt_carveout(void *fdt, uint32_t address_cells,
 	       &expected.end, address_cells, size_cells);
 
 	CHECK(fdtdec_get_carveout(fdt, name, "memory-region", 0, &carveout,
-				  NULL, NULL, NULL));
+				  NULL, NULL, NULL, NULL));
 
 	if ((carveout.start != expected.start) ||
 	    (carveout.end != expected.end)) {
diff --git a/lib/optee/optee.c b/lib/optee/optee.c
index 3fbde93..b036224 100644
--- a/lib/optee/optee.c
+++ b/lib/optee/optee.c
@@ -161,6 +161,7 @@ int optee_copy_fdt_nodes(void *new_blob)
 					.start = res.start,
 					.end = res.end,
 				};
+				unsigned long flags = FDTDEC_RESERVED_MEMORY_NO_MAP;
 				char *oldname, *nodename, *tmp;
 
 				oldname = strdup(name);
@@ -178,7 +179,7 @@ int optee_copy_fdt_nodes(void *new_blob)
 								 nodename,
 								 &carveout,
 								 NULL, 0,
-								 NULL, true);
+								 NULL, flags);
 				free(oldname);
 
 				if (ret < 0)