From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3C04820D.5070904@embeddededge.com> Date: Wed, 28 Nov 2001 01:19:57 -0500 From: Dan Malek MIME-Version: 1.0 To: Rudolf Ladyzhenskii Cc: "'linuxppc-embedded@lists.linuxppc.org'" Subject: Re: BDI2000 PTEs References: Content-Type: text/plain; charset=us-ascii; format=flowed Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Rudolf Ladyzhenskii wrote: > All I need for kernel debugging is BAT only translation. I cleared it > according to BDI2000 manual. Ummm....I think you need more than that for debugging loadable modules. The BAT translation won't work for loadable modules, you have to find all of their code and data through page tables. > I looked at 2.4.14 kernel. It only has BDI2000 support in file > /arch/ppc/kernel/head_8xx.S Well hell....I wonder why they were never updated in 2.4.14. Take a look at the PowerPC development kernels, then. > Which lines do I have to add? Add this right after the 'bl load_up_mmu': /* Add helper information for the Abatron bdiGDB debugger. * We do this here because we know the mmu is disabled, and * will be enabled for real in just a few instructions. */ lis r5, abatron_pteptrs@h ori r5, r5, abatron_pteptrs@l stw r5, 0xf0(r0) /* This much match your Abatron config */ lis r6, swapper_pg_dir@h ori r6, r6, swapper_pg_dir@l tophys(r5, r5) stw r6, 0(r5) Good Luck. -- Dan ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/