[U-Boot-Users] About interrupt processing on MIPS32 4Kc

[U-Boot-Users] About interrupt processing on MIPS32 4Kc

[sai]

I am using Broadcom BCM7401 platform of MIPS32 4Kc bases.

This time, I decided to do u-boot porting.

In the midst of analyze source code, found out to u-boot's code for MIPS32
4Kc that interrupt processing part does not exist.

Why do not handle interrupt processing in u-boot of MIPS32 4Kc bases?

Could not find exception vector processing part.

relocate_code() exception vector thing which do relocation by memory be?

Basically, do not you use interrupt in u-boot of MIPS32 4Kc bases?

How do you treat devices(UART, Etherent,..) back differing without
interrupt?

Are you doing polling?



I wonder very.

-- 
***************************************
Yongdae, Shin
***************************************
H.P : 017-268-4413
Office : 02-555-9200 (312)
***************************************
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[U-Boot-Users] About interrupt processing on MIPS32 4Kc

[Jerry Van Baren]

sai wrote:
> 
> I am using Broadcom BCM7401 platform of MIPS32 4Kc bases.
> 
> This time, I decided to do u-boot porting.
> 
> In the midst of analyze source code, found out to u-boot's code for 
> MIPS32 4Kc that interrupt processing part does not exist.
> 
> Why do not handle interrupt processing in u-boot of MIPS32 4Kc bases?
> 
> Could not find exception vector processing part.
> 
> relocate_code() exception vector thing which do relocation by memory be?
> 
> Basically, do not you use interrupt in u-boot of MIPS32 4Kc bases?
> 
> How do you treat devices(UART, Etherent,..) back differing without 
> interrupt?
> 
> Are you doing polling?
> 
> I wonder very.
> -- 
> ***************************************
> Yongdae, Shin
> ***************************************

U-boot runs polled mode rather than using interrupts (with a couple of 
exceptions).  U-boot is single-threaded and simple (well, compared to 
linux).  The rationale is that, if you want an interrupt driven 
multitasking system, run linux.  ;-)

Best regards,
gvb