Load the interrupt vector table into ram at startup. This reduces the
chance of a flash cache access causing timing instability.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Place all normal code into ram. This reduces the chance that rp2040
instruction cache misses could cause subtle timing issues.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Specify the arm architecture flash bootup address for each chip type
in Kconfig using a new FLASH_BOOT_ADDRESS setting.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Support the rp2040 (as tested on a Raspberry Pi Pico board). This
adds basic uart, timer, gpio, and watchdog support.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
