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AM6442: am6442-evm linux 更改DDR大小配置

Part Number: AM6442

我想要更改DDR的大小为512,官方的大小是1G和2G的,所以需要更改一些数据,现在我在设备树里面对memory@80000000做了更改

	memory@80000000 {
		device_type = "memory";
		/* 512M RAM */
		reg = <0x00000000 0x80000000 0x00000000 0x20000000>;
	};

并且更改了R5和M4核心的预留地址到了512M的范围以内,但是这样更改之后内核无法启动了,请问是不是还要更改哪里的数据?