[PATCH v2 5/8] of: add reserved_mem_read initcall

[Rouven Czerwinski <r.czerwinski@pengutronix.de>]

Add a reserved_mem_read initcall which parses the reserved-memory
entries and adds barebox of reserve entries. Also remove the OP-TEE size
of reserve entry, since this is now parsed from the DT and does not need
to be statically configured any longer.

Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
---
 drivers/of/Makefile       |  1 +
 drivers/of/reserved-mem.c | 43 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 drivers/of/reserved-mem.c

diff --git a/drivers/of/Makefile b/drivers/of/Makefile
index b6847752d2..b69cb84b99 100644
--- a/drivers/of/Makefile
+++ b/drivers/of/Makefile
@@ -4,6 +4,7 @@ obj-$(CONFIG_OF_GPIO) += of_gpio.o
 obj-$(CONFIG_OF_PCI) += of_pci.o
 obj-y += partition.o
 obj-y += of_net.o
+obj-$(CONFIG_OFDEVICE) += reserved-mem.o
 obj-$(CONFIG_MTD) += of_mtd.o
 obj-$(CONFIG_OF_BAREBOX_DRIVERS) += barebox.o
 obj-$(CONFIG_OF_OVERLAY) += overlay.o resolver.o of_firmware.o
diff --git a/drivers/of/reserved-mem.c b/drivers/of/reserved-mem.c
new file mode 100644
index 0000000000..8519a7e3dd
--- /dev/null
+++ b/drivers/of/reserved-mem.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// SPDX-FileCopyrightText: 2021 Rouven Czerwinski <r.czerwinski@pengutronix.de>, Pengutronix
+
+#define pr_fmt(fmt) "reserved-memory: " fmt
+
+#define DEBUG
+
+#include <common.h>
+#include <init.h>
+#include <of.h>
+#include <of_address.h>
+#include <malloc.h>
+#include <partition.h>
+
+static int reserved_mem_read(void)
+{
+	struct device_node *node, *child;
+	struct resource resource;
+	int flag;
+
+	node = of_find_node_by_path("/reserved-memory");
+	if (!node)
+		return 0;
+
+	for_each_child_of_node(node, child) {
+		flag = OF_RESERVE_ENTRY_FLAG_NO_RESERVE;
+
+		of_address_to_resource(child, 0, &resource);
+
+		pr_err("Res-Mem start: 0x%08x\n", resource.start);
+		pr_err("Res-Mem end: 0x%08x\n", resource.end);
+
+		if (of_find_property(child, "no-map", 0)) {
+			pr_debug("child %p: no-map\n", child);
+			flag |= OF_RESERVE_ENTRY_FLAG_XN;
+		}
+
+		of_add_reserve_entry(resource.start, resource.end, flag);
+	}
+
+	return 0;
+}
+postconsole_initcall(reserved_mem_read);
-- 
2.32.0


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