| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (C) Copyright 2008-2011 |
| * Graeme Russ, <graeme.russ@gmail.com> |
| * |
| * (C) Copyright 2002 |
| * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se> |
| * |
| * (C) Copyright 2002 |
| * Wolfgang Denk, DENX Software Engineering, <wd@denx.de> |
| * |
| * (C) Copyright 2002 |
| * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
| * Marius Groeger <mgroeger@sysgo.de> |
| * |
| * Copyright 2015 ATS Advanced Telematics Systems GmbH |
| * Copyright 2015 Konsulko Group, Matt Porter <mporter@konsulko.com> |
| */ |
| |
| #include <common.h> |
| #include <command.h> |
| |
| /* |
| * ARMv7M does not support ARM instruction mode. However, the |
| * interworking BLX and BX instructions do encode the ARM/Thumb |
| * field in bit 0. This means that when executing any Branch |
| * and eXchange instruction we must set bit 0 to one to guarantee |
| * that we keep the processor in Thumb instruction mode. From The |
| * ARMv7-M Instruction Set A4.1.1: |
| * "ARMv7-M only supports the Thumb instruction execution state, |
| * therefore the value of address bit [0] must be 1 in interworking |
| * instructions, otherwise a fault occurs." |
| */ |
| unsigned long do_go_exec(ulong (*entry)(int, char * const []), |
| int argc, char *const argv[]) |
| { |
| ulong addr = (ulong)entry | 1; |
| entry = (void *)addr; |
| |
| return entry(argc, argv); |
| } |
