+
+#define checkuart(rp, rv, lhu, bit, uart) \
+               /* Load address of CLK_RST register */ \
+               movw    rp, #TEGRA_CLK_RST_DEVICES_##lhu & 0xffff ; \
+               movt    rp, #TEGRA_CLK_RST_DEVICES_##lhu >> 16 ; \
+               /* Load value from CLK_RST register */ \
+               ldr     rp, [rp, #0] ; \
+               /* Test UART's reset bit */ \
+               tst     rp, #(1 << bit) ; \
+               /* If set, can't use UART; jump to save no UART */ \
+               bne     90f ; \
+               /* Load address of CLK_OUT_ENB register */ \
+               movw    rp, #TEGRA_CLK_OUT_ENB_##lhu & 0xffff ; \
+               movt    rp, #TEGRA_CLK_OUT_ENB_##lhu >> 16 ; \
+               /* Load value from CLK_OUT_ENB register */ \
+               ldr     rp, [rp, #0] ; \
+               /* Test UART's clock enable bit */ \
+               tst     rp, #(1 << bit) ; \
+               /* If clear, can't use UART; jump to save no UART */ \
+               beq     90f ; \
+               /* Passed all tests, load address of UART registers */ \
+               movw    rp, #TEGRA_UART##uart##_BASE & 0xffff ; \
+               movt    rp, #TEGRA_UART##uart##_BASE >> 16 ; \
+               /* Jump to save UART address */ \
+               b 91f

Maybe make this a subroutine?

Cheers,

Peter.