[U-Boot-Users] (no subject)

[Howard, Marc]

Stefan,

Actually > 256MB won't work correctly.  There is a problem in
board/amcc/ocotea/init.S:

tlbtab:
    tlbtab_start
    tlbentry( 0xf0000000, SZ_256M, 0xf0000000, 1,
AC_R|AC_W|AC_X|SA_G|SA_I)
    tlbentry( CFG_PERIPHERAL_BASE, SZ_256M, 0x40000000, 1,
AC_R|AC_W|SA_G|SA_I)
    tlbentry( CFG_ISRAM_BASE, SZ_4K, 0x80000000, 0, AC_R|AC_W|AC_X )
    tlbentry( CFG_ISRAM_BASE + 0x1000, SZ_4K, 0x80001000, 0,
AC_R|AC_W|AC_X )
    tlbentry( CFG_SDRAM_BASE, SZ_256M, 0x00000000, 0,
AC_R|AC_W|AC_X|SA_G|SA_I )
    tlbentry( CFG_SDRAM_BASE+0x10000000, SZ_256M, 0x00000000, 0,
AC_R|AC_W|AC_X|SA_G|SA_I )
    tlbentry( CFG_PCI_BASE, SZ_256M, 0x00000000, 2, AC_R|AC_W|SA_G|SA_I
)
    tlbentry( CFG_PCI_MEMBASE, SZ_256M, 0x00000000, 3,
AC_R|AC_W|SA_G|SA_I )
    tlbtab_en

The line:
 
tlbentry( CFG_SDRAM_BASE+0x10000000, SZ_256M, 0x00000000, 0,
AC_R|AC_W|AC_X|SA_G|SA_I )

...should be...

tlbentry( CFG_SDRAM_BASE+0x10000000, SZ_256M, 0x10000000, 0,
AC_R|AC_W|AC_X|SA_G|SA_I )
                                                ^
------------------------------------------------^

The way it currently stands virtual addresses 256-512MB are mapped into
the same region as the 1st 256MB of SDRAM.

Marc Howard


> -----Original Message-----
> From: u-boot-users-bounces at lists.sourceforge.net 
> [mailto:u-boot-users-bounces at lists.sourceforge.net] On Behalf 
> Of Stefan Roese
> Sent: Thursday, September 28, 2006 5:48 AM
> To: u-boot-users at lists.sourceforge.net
> Subject: Re: [U-Boot-Users] (no subject)
> 
> Hi Gerald,
> 
> On Thursday 28 September 2006 04:03, Gerald Jackson wrote:
> > Does anyone know why u-boot 1.1.4 fails if you use two dimms in the
> > Ocotea Amcc board?
> >
> > I have try two 256 dimm, two 512 dimm, and one 256 dimm in 
> the second
> > slot ( nothing in the first slot) it all fails.
> >
> > Is this a know problem with the Ocotea board?
> 
> No. IIRC, we have tested Ocotea with different DIMM modules. 
> Which U-Boot 
> version are you using? What DIMM modules are you using? And 
> what combination 
> _is_ working?
> 
> A quick look at the TLB setup shows me, that a maximum of 
> 512MBytes could be 
> working. For more at least the TLB setup has to be changed.
> 
> Best regards,
> Stefan
> 
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