From: Michal Simek <michal.simek@xilinx.com>
Date: Fri, 25 Feb 2022 13:17:31 +0000 (+0100)
Subject: microblaze: Add support for reserved memory defined by DT
X-Git-Tag: v6.1-rc5~1206^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=68cbfae83a7208d960034813c4744bf9651a725d;p=platform%2Fkernel%2Flinux-starfive.git

microblaze: Add support for reserved memory defined by DT

In DT reserved memory nodes can be added as is described by
Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
but Microblaze didn't have a support for it. The similar change was done
for ARC by commit 1b10cb21d888 ("ARC: add support for reserved memory
defined by device tree"). It is pretty much enough to call
early_init_fdt_scan_reserved_mem().
Microblaze is not using initial_boot_params that's why there is no need to
call early_init_fdt_reserve_self().

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/da4395776bf0de7207767abcc8a5df05bf411816.1645795048.git.michal.simek@xilinx.com
---

diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index de0d8b0..f4e5034 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -13,6 +13,7 @@
 #include <linux/kernel.h>
 #include <linux/mm.h> /* mem_init */
 #include <linux/initrd.h>
+#include <linux/of_fdt.h>
 #include <linux/pagemap.h>
 #include <linux/pfn.h>
 #include <linux/slab.h>
@@ -261,6 +262,8 @@ asmlinkage void __init mmu_init(void)
 
 	parse_early_param();
 
+	early_init_fdt_scan_reserved_mem();
+
 	/* CMA initialization */
 	dma_contiguous_reserve(memory_start + lowmem_size - 1);