From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jerry Van Baren Date: Fri, 30 Nov 2007 09:11:45 -0500 Subject: [U-Boot-Users] [PATCH] PPC4xx: Minimal changes to add vxWorks support In-Reply-To: <200711301501.58665.niklausgiger@gmx.ch> References: <200711301501.58665.niklausgiger@gmx.ch> Message-ID: <47501A21.2010107@ge.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Niklaus Giger wrote: > Hi > > I have to support vxWorks on our boards. In order to avoid changing the TLB > in all PPC440x based boards I need this small patch. Can it go into the > git repository or do I have to maintain it out of the tree forever? > > Best regards > > Signed-off-by: Niklaus Giger > --- > cpu/ppc4xx/start.S | 5 ++++- > 1 files changed, 4 insertions(+), 1 deletions(-) > > diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S > index 9626b65..8f19444 100644 > --- a/cpu/ppc4xx/start.S > +++ b/cpu/ppc4xx/start.S > @@ -1432,7 +1432,10 @@ relocate_code: > dccci 0,0 /* Invalidate data cache, now no longer our stack */ > sync > isync > - addi r1,r0,0x0000 /* TLB entry #0 */ > +#ifndef CFG_TLB_FOR_BOOT_FLASH > +#define CFG_TLB_FOR_BOOT_FLASH 0 > +#endif > + addi r1,r0,CFG_TLB_FOR_BOOT_FLASH /* TLB entry (default #0) */ > tlbre r0,r1,0x0002 /* Read contents */ > ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */ > tlbwe r0,r1,0x0002 /* Save it out */ Hi Niklaus, I don't know the answer to your question, but the following alternate construct is cleaner (and cleaner may help get acceptance ;-): #ifdef CFG_TLB_FOR_BOOT_FLASH addi r1,r0,CFG_TLB_FOR_BOOT_FLASH /* Use defined TLB */ #else addi r1,r0,0x0000 /* Default TLB entry is #0 */ #endif Best regards, gvb