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7ff2dfb604
Add a basic software implementation of the ARM64 pagetable walker. This can be used for debugging U-Boot's pagetable, as well as dumping the pagetable from the previous bootloader stage if it used one (by reading out the ttbr address). One can either call dump_pagetable() to print the pagetable to the console with the default formatter, or implement their own pagetable handler using walke_pagetable() with a custom pte_walker_cb_t callback. All of the added code is discarded when unused, hence there is no need to add an additional Kconfig option for this. Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>