imx: imx8qm/qxp: reserving DDR memory for M4
The DDR memory from 0x88000000 to 0x8FFFFFFF is assigned to M4 on
QM and QXP. The M4 can allocate this memory by two ways,
in SCD or u-boot.
In this patch, u-boot addes the memory reserve node to DTB to pass
the info to kernel, no matter the M4 memory is reserved in SCD
or u-boot. So kernel won't access M4 reserved memory.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/mach-imx/imx8/fdt.c b/arch/arm/mach-imx/imx8/fdt.c
index 65c8ac1..5993645 100644
--- a/arch/arm/mach-imx/imx8/fdt.c
+++ b/arch/arm/mach-imx/imx8/fdt.c
@@ -8,6 +8,7 @@
#include <asm/arch/sys_proto.h>
#include <dm/ofnode.h>
#include <fdt_support.h>
+#include <linux/libfdt.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -279,6 +280,15 @@
int ft_system_setup(void *blob, bd_t *bd)
{
int ret;
+ int off;
+
+ if (CONFIG_BOOTAUX_RESERVED_MEM_BASE) {
+ off = fdt_add_mem_rsv(blob, CONFIG_BOOTAUX_RESERVED_MEM_BASE,
+ CONFIG_BOOTAUX_RESERVED_MEM_SIZE);
+ if (off < 0)
+ printf("Failed to reserve memory for bootaux: %s\n",
+ fdt_strerror(off));
+ }
update_fdt_with_owned_resources(blob);