MIPS: Loongson64: Add Loongson-2K1000 early_printk_port

Distinguish between Loongson-3A series CPU and Loongson-2K1000 CPU UART0.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Tested-by: Ming Wang <wangming01@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

diff --git a/arch/mips/loongson64/init.c b/arch/mips/loongson64/init.c
index ed280b73bf89320dc590e47658fa756ea91245a1..d5a1eddb820248ebed6ac3324c784d44536ab07a 100644 (file)
--- a/arch/mips/loongson64/init.c
+++ b/arch/mips/loongson64/init.c
@@ -120,7 +120,10 @@ void __init prom_init(void)
 #endif
 
        /* Hardcode to CPU UART 0 */
-       setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024);
+       if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64R)
+               setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE), 0, 1024);
+       else
+               setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024);
 
        register_smp_ops(&loongson3_smp_ops);
        board_nmi_handler_setup = mips_nmi_setup;