UART_SHIFT         35 arch/arm/include/debug/8250.S #define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT
UART_SHIFT         40 arch/arm/include/debug/brcmstb.S #define UART_SHIFT		2
UART_SHIFT         18 arch/arm/include/debug/tegra.S #define UART_SHIFT 2