From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WPppJ-0002tB-Ms for barebox@lists.infradead.org; Tue, 18 Mar 2014 08:56:50 +0000 From: Sascha Hauer Date: Tue, 18 Mar 2014 09:56:26 +0100 Message-Id: <1395132986-25217-1-git-send-email-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH] ARM: MMU: Fix memory reaching to the end of address space To: barebox@lists.infradead.org For memory reaching the end of the address space phys + bank->size overflows to 0. Fix this by right shifting phys and bank->size before adding them. Signed-off-by: Sascha Hauer --- arch/arm/cpu/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/cpu/mmu.c b/arch/arm/cpu/mmu.c index 84daa3d..bf0141b 100644 --- a/arch/arm/cpu/mmu.c +++ b/arch/arm/cpu/mmu.c @@ -200,7 +200,7 @@ static int arm_mmu_remap_sdram(struct memory_bank *bank) { unsigned long phys = (unsigned long)bank->start; unsigned long ttb_start = phys >> 20; - unsigned long ttb_end = (phys + bank->size) >> 20; + unsigned long ttb_end = (phys >> 20) + (bank->size >> 20); unsigned long num_ptes = bank->size >> 10; int i, pte; u32 *ptes; -- 1.9.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox