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* target/arm: Implement BLXNSPeter Maydell2017-10-121-0/+1
| | | | | | | | | Implement the BLXNS instruction, which allows secure code to call non-secure code. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 1507556919-24992-4-git-send-email-peter.maydell@linaro.org
* target/arm: Implement BXNS, and banked stack pointersPeter Maydell2017-09-071-0/+2
| | | | | | | | | | | | | | | | | | Implement the BXNS v8M instruction, which is like BX but will do a jump-and-switch-to-NonSecure if the branch target address has bit 0 clear. This is the first piece of code which implements "switch to the other security state", so the commit also includes the code to switch the stack pointers around, which is the only complicated part of switching security state. BLXNS is more complicated than just "BXNS but set the link register", so we leave it for a separate commit. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 1503414539-28762-21-git-send-email-peter.maydell@linaro.org
* target-arm: Use clz opcodeRichard Henderson2017-01-101-1/+0Star
| | | | | Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
* Move target-* CPU file into a target/ folderThomas Huth2016-12-201-0/+542
We've currently got 18 architectures in QEMU, and thus 18 target-xxx folders in the root folder of the QEMU source tree. More architectures (e.g. RISC-V, AVR) are likely to be included soon, too, so the main folder of the QEMU sources slowly gets quite overcrowded with the target-xxx folders. To disburden the main folder a little bit, let's move the target-xxx folders into a dedicated target/ folder, so that target-xxx/ simply becomes target/xxx/ instead. Acked-by: Laurent Vivier <laurent@vivier.eu> [m68k part] Acked-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> [tricore part] Acked-by: Michael Walle <michael@walle.cc> [lm32 part] Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> [s390x part] Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> [s390x part] Acked-by: Eduardo Habkost <ehabkost@redhat.com> [i386 part] Acked-by: Artyom Tarasenko <atar4qemu@gmail.com> [sparc part] Acked-by: Richard Henderson <rth@twiddle.net> [alpha part] Acked-by: Max Filippov <jcmvbkbc@gmail.com> [xtensa part] Reviewed-by: David Gibson <david@gibson.dropbear.id.au> [ppc part] Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> [cris&microblaze part] Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> [unicore32 part] Signed-off-by: Thomas Huth <thuth@redhat.com>