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arm: Create /chosen and /memory devicetree nodes if necessary 

While customary, the /chosen and /memory devicetree nodes do not have to
exist. Create if necessary. Also create the /memory/device_type property
if needed.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Message-id: 1479346221-18474-1-git-send-email-linux@roeck-us.net
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Guenter Roeck 2016-11-16 17:30:21 -08:00 committed by Peter Maydell
parent 6aa3a61657
commit b77257d7ba
1 changed files with 17 additions and 0 deletions
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17
hw/arm/boot.c
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@ -9,6 +9,7 @@
#include "qemu/osdep.h"
#include "qapi/error.h"
#include <libfdt.h>
#include "hw/hw.h"
#include "hw/arm/arm.h"
#include "hw/arm/linux-boot-if.h"
@ -486,6 +487,17 @@ static int load_dtb(hwaddr addr, const struct arm_boot_info *binfo,
g_free(nodename);
}
} else {
Error *err = NULL;
rc = fdt_path_offset(fdt, "/memory");
if (rc < 0) {
qemu_fdt_add_subnode(fdt, "/memory");
}
if (!qemu_fdt_getprop(fdt, "/memory", "device_type", NULL, &err)) {
qemu_fdt_setprop_string(fdt, "/memory", "device_type", "memory");
}
rc = qemu_fdt_setprop_sized_cells(fdt, "/memory", "reg",
acells, binfo->loader_start,
scells, binfo->ram_size);
@ -495,6 +507,11 @@ static int load_dtb(hwaddr addr, const struct arm_boot_info *binfo,
}
}
rc = fdt_path_offset(fdt, "/chosen");
if (rc < 0) {
qemu_fdt_add_subnode(fdt, "/chosen");
}
if (binfo->kernel_cmdline && *binfo->kernel_cmdline) {
rc = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
binfo->kernel_cmdline);