from arch/mips/kernel/head.S we know that use a0~a3 for fw_arg0~fw_arg3
there is some code from head.S:
LONG_S a0, fw_arg0 # firmware arguments
LONG_S a1, fw_arg1
LONG_S a2, fw_arg2
LONG_S a3, fw_arg3
Signed-off-by: xiaochuan mao <maoxiaochuan@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
extern char arcs_cmdline[COMMAND_LINE_SIZE];
/*
- * Registers a0, a1, a3 and a4 as passed to the kernel entry by firmware
+ * Registers a0, a1, a2 and a3 as passed to the kernel entry by firmware
*/
extern unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;