Sorry, It's still Malta board, MIPS4Kc cpu. the UART is ti16c550c. The source code at junsun.net is : ------------------------------------------------------ #include "uart16550.h" /* === CONFIG === */ #define BASE 0xb0000080 ------------------------------------------------------ >From the MALTA board manual, I can get "BASE"'s physical addr is 0x1f000900. What I want to know is how to get "BASE"'s memory mapped virtual addr correctly?for this example: the virtual addr is 0xb0000080. Thanks! --- Ralf Baechle <ralf@xxxxxxxxxxxxxx> wrote: > On Mon, Apr 04, 2005 at 12:49:53PM +0800, dfsd df > wrote: > > > Hi: > > Had somebody used early-printk? Now, I'm porting > > linux to a MIPS machine under instructions of > "Linux > > MIPS Porting Guide" from junsun.net. > > There's an updated version in the www.linux-mips.org > wiki. > > > But at the first step, I want to modify the source > > code of the barebone program to display > "helloworld". > > > > The program uses memory map addr as the UART > device's > > "base addr",and access the UART by adding offset > to > > this "base addr". > > > > The "base addr" is assigned to a constant value. > and > > from the other early-printk patchs, the value of > "base > > addr" are not equals. So I want to know can I > assign > > the right value to this "base addr"? > > You haven't even mentioned what hardware you're > using so don't expect > answer ... > > Ralf > > _________________________________________________________ Do You Yahoo!? 150万曲MP3疯狂搜，带您闯入音乐殿堂 http://music.yisou.com/ 美女明星应有尽有，搜遍美图、艳图和酷图 http://image.yisou.com 1G就是1000兆，雅虎电邮自助扩容！ http://cn.rd.yahoo.com/mail_cn/tag/1g/*http://cn.mail.yahoo.com/event/mail_1g/
