Cc'ing Joaquín.
On 4/28/21 9:15 PM, Frederic Konrad wrote:
> According to the as documentation:
> (https://sourceware.org/binutils/docs-2.36/as/AVR-Options.html)
>
> "Instruction set avr51 is for the enhanced AVR core with exactly 128K
> program memory space (MCU types: atmega128, atmega128a, atmega1280,
> atmega1281, atmega1284, atmega1284p, atmega128rfa1, atmega128rfr2,
> atmega1284rfr2, at90can128, at90usb1286, at90usb1287, m3000)."
>
> But when compiling a program for atmega1280 or avr51 and trying to execute
> it:
>
> $ cat > test.S << EOF
>> loop:
>> rjmp loop
>> EOF
> $ avr-gcc -nostdlib -nostartfiles -mmcu=atmega1280 test.S -o test.elf
> $ qemu-system-avr -serial mon:stdio -nographic -no-reboot -M mega \
> -bios test.elf
> qemu-system-avr: Current machine: Arduino Mega (ATmega1280) with 'avr6' CPU
> qemu-system-avr: ELF image 'test.elf' is for 'avr51' CPU
>
> So this fixes the atmega1280 class to use an avr51 CPU.
>
> Signed-off-by: Frederic Konrad <frederic.kon...@adacore.com>
> ---
> hw/avr/atmega.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/hw/avr/atmega.c b/hw/avr/atmega.c
> index 44c6afebbb..e3ea5702f5 100644
> --- a/hw/avr/atmega.c
> +++ b/hw/avr/atmega.c
> @@ -402,7 +402,7 @@ static void atmega1280_class_init(ObjectClass *oc, void
> *data)
> {
> AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
>
> - amc->cpu_type = AVR_CPU_TYPE_NAME("avr6");
> + amc->cpu_type = AVR_CPU_TYPE_NAME("avr51");
> amc->flash_size = 128 * KiB;
> amc->eeprom_size = 4 * KiB;
> amc->sram_size = 8 * KiB;
>
