mgtool: Add support for setting fixed ROM address into image header
The commit adds support for IMAGE_F_ROM_FIXED flag that allows setting
information on image base address into image_header.
Signed-off-by: Dominik Ermel <dominik.ermel@nordicsemi.no>
diff --git a/scripts/imgtool/image.py b/scripts/imgtool/image.py
index 20c2e32..3061e78 100644
--- a/scripts/imgtool/image.py
+++ b/scripts/imgtool/image.py
@@ -49,9 +49,10 @@
# Image header flags.
IMAGE_F = {
'PIC': 0x0000001,
+ 'ENCRYPTED': 0x0000004,
'NON_BOOTABLE': 0x0000010,
'RAM_LOAD': 0x0000020,
- 'ENCRYPTED': 0x0000004,
+ 'ROM_FIXED': 0x0000100,
}
TLV_VALUES = {
@@ -130,7 +131,12 @@
pad_header=False, pad=False, confirm=False, align=1,
slot_size=0, max_sectors=DEFAULT_MAX_SECTORS,
overwrite_only=False, endian="little", load_addr=0,
- erased_val=None, save_enctlv=False, security_counter=None):
+ rom_fixed=None, erased_val=None, save_enctlv=False,
+ security_counter=None):
+
+ if load_addr and rom_fixed:
+ raise click.UsageError("Can not set rom_fixed and load_addr at the same time")
+
self.version = version or versmod.decode_version("0")
self.header_size = header_size
self.pad_header = pad_header
@@ -143,6 +149,7 @@
self.endian = endian
self.base_addr = None
self.load_addr = 0 if load_addr is None else load_addr
+ self.rom_fixed = rom_fixed
self.erased_val = 0xff if erased_val is None else int(erased_val, 0)
self.payload = []
self.enckey = None
@@ -459,6 +466,8 @@
# Indicates that this image should be loaded into RAM
# instead of run directly from flash.
flags |= IMAGE_F['RAM_LOAD']
+ if self.rom_fixed:
+ flags |= IMAGE_F['ROM_FIXED']
e = STRUCT_ENDIAN_DICT[self.endian]
fmt = (e +
@@ -475,7 +484,7 @@
assert struct.calcsize(fmt) == IMAGE_HEADER_SIZE
header = struct.pack(fmt,
IMAGE_MAGIC,
- self.load_addr,
+ self.rom_fixed or self.load_addr,
self.header_size,
protected_tlv_size, # TLV Info header + Protected TLVs
len(self.payload) - self.header_size, # ImageSz