Re: CVS commit: src/sys/arch/arm/ixp12x0

[Jason R Thorpe <thorpej%wasabisystems.com@localhost>]

On Sat, Feb 22, 2003 at 02:00:05PM +0900, Naoto Shimazaki wrote:

 > If I understood you correctly, you mean the following config is
 > invalid don't you?
 > 
 > ixpcom* at ixpsip? addr 0xf0000000 size 0x4000
 >                         ^^^^^^^^^^virtual address

Yah, what I mean here is that the locators should use a physical
address.  Consider the ADI_BRH config:

com0            at obio? addr 0x03000000 irq 24
com1            at obio? addr 0x03100000 irq 25

Those are physical addresses.  In brh_machdep.c, I also statically map
the console UART for use before VM comes up.  I compensate for this in
obio_space.c:obio_bs_map() -- see the switch statement[*].

[*] I really should be using the same table to special-case the UARTs
as is used to statically map them ... but that's just an implementation
detail :-)

 > It is hard of avoiding for console to access UART through the
 > statically mapped address (virtual 0xf0000000).  Because I want
 > to use console before the vm is established.
 > 
 > So I will modify sources as following.
 > 
 >      - to identify device instance, using hardware address.
 >      - when console accesses device, using statically mapped address.
 >      - when tty accesses device, using handler given by bus_space_map().

-- 
        -- Jason R. Thorpe <thorpej%wasabisystems.com@localhost>