[U-Boot-Users] IO access in U-BOOT

[U-Boot-Users] IO access in U-BOOT

[terry]

hi,

I use the ARM926ejs, it need set the I/O as input, output or other
status. Also it need read the I/O port.And "all IO is memory mapped".
In u-boot how to support this, where to configure it, or it need write
by myself.

Another question, in uboot, the  irq of ARM926ejs was closed by a macro
CONFIG_USE_IRQ. So the irq interrupt is no used, then how u-boot support
the keyboard, network, and IDE hard disk, polling? if need support USB,
can it still use polling driver?

Does someone have more document about the u-boot, I really need

Thank you

Terry

[U-Boot-Users] IO access in U-BOOT

[蔡栋]

hi terry

>hi,
>
>I use the ARM926ejs, it need set the I/O as input, output or other
>status. Also it need read the I/O port.And "all IO is memory mapped".
>In u-boot how to support this, where to configure it, or it need write
>by myself.
>
In convention u-boot do it in cpu/<you cpu id>/start.S

			best regards

				 
??????????
????????caidong at kedacom.com
??????????2005-11-29

[U-Boot-Users] IO access in U-BOOT

[Wolfgang Denk]

In message <OF301B3B63.E25B41D2-ON482570C8.002F5342@com> you wrote:
> aGkgdGVycnkNCg0KPmhpLA0KPg0KPkkgdXNlIHRoZSBBUk05MjZlanMsIGl0IG5lZWQgc2V0IHRo
> ZSBJL08gYXMgaW5wdXQsIG91dHB1dCBvciBvdGhlcg0KPnN0YXR1cy4gQWxzbyBpdCBuZWVkIHJl
> YWQgdGhlIEkvTyBwb3J0LkFuZCAiYWxsIElPIGlzIG1lbW9yeSBtYXBwZWQiLg0KPkluIHUtYm9v
> dCBob3cgdG8gc3VwcG9ydCB0aGlzLCB3aGVyZSB0byBjb25maWd1cmUgaXQsIG9yIGl0IG5lZWQg
> d3JpdGUNCj5ieSBteXNlbGYuDQo+DQpJbiBjb252ZW50aW9uIHUtYm9vdCBkbyBpdCBpbiBjcHUv
> PHlvdSBjcHUgaWQ+L3N0YXJ0LlMNCg0KCQkJYmVzdCByZWdhcmRzDQoNCgkJCQkgDQqhoaGhoaGh
> oaGhoaGhoaGhssy2sA0KoaGhoaGhoaGhoaGhoaGhoWNhaWRvbmdAa2VkYWNvbS5jb20NCqGhoaGh
> oaGhoaGhoaGhoaGhoaGhMjAwNS0xMS0yOQ0KDQo=

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>I use the ARM926ejs, it need set the I/O as input, output or other
>status. Also it need read the I/O port.And "all IO is memory mapped".
>In u-boot how to support this, where to configure it, or it need write
>by myself.
>
In convention u-boot do it in cpu/<you cpu id>/start.S

NO!!!! *Never* place any board dependent code in any files in cpu/  -
such code obviously belongs to your board-specific code in board/

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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