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The allwinner_h3_dramc_map_rows function simulates row addressing behavior when bootloader software attempts to detect the amount of available SDRAM. Currently the line that calculates the 64-bit address of the mirrored row uses a signed 32-bit multiply operation that in theory could result in the upper 32-bit be all 1s. This commit ensures that the row mirror address is calculated using only 64-bit operations. Reported-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Niek Linnenbank <nieklinnenbank@gmail.com> Message-id: 20200323192944.5967-1-nieklinnenbank@gmail.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>