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2021-07-09target/avr: Mark some helpers noreturnRichard Henderson
All of these helpers end with cpu_loop_exit. Reviewed-by: Michael Rolnik <mrolnik@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-07-11target/avr: Add instruction helpersMichael Rolnik
Add helpers for instructions that need to interact with QEMU. Also, add stubs for unimplemented instructions. Instructions SPM and WDR are left unimplemented because they require emulation of complex peripherals. The implementation of instruction SLEEP is very limited due to the lack of peripherals to generate wake interrupts. Memory access instructions are implemented here because some address ranges actually refer to CPU registers. Signed-off-by: Michael Rolnik <mrolnik@gmail.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Aleksandar Markovic <aleksandar.m.mail@gmail.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Aleksandar Markovic <aleksandar.m.mail@gmail.com> Signed-off-by: Thomas Huth <huth@tuxfamily.org> Message-Id: <20200705140315.260514-10-huth@tuxfamily.org> [PMD: Replace cpu_physical_memory() API by address_space_ldst() API to fix running on big-endian host, reported and suggested by Peter Maydell] Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>