From patchwork Tue Apr 9 19:48:58 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Beno=C3=AEt_Th=C3=A9baudeau?= X-Patchwork-Id: 235219 X-Patchwork-Delegate: albert.aribaud@free.fr Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from theia.denx.de (theia.denx.de [85.214.87.163]) by ozlabs.org (Postfix) with ESMTP id EE5C72C00A1 for ; Wed, 10 Apr 2013 05:58:18 +1000 (EST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 4B9504A149; Tue, 9 Apr 2013 21:53:57 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id KOCu4r--+OG1; Tue, 9 Apr 2013 21:53:57 +0200 (CEST) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 906D04A14A; Tue, 9 Apr 2013 21:51:03 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 561814A021 for ; Tue, 9 Apr 2013 21:50:23 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Jgt2eIG4h0m4 for ; Tue, 9 Apr 2013 21:50:22 +0200 (CEST) X-policyd-weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 (only DNSBL check requested) Received: from zose-mta13.web4all.fr (zose-mta13.web4all.fr [178.33.204.91]) by theia.denx.de (Postfix) with ESMTPS id A11A84A025 for ; Tue, 9 Apr 2013 21:49:15 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by zose-mta13.web4all.fr (Postfix) with ESMTP id 3A53A6A0DE; Tue, 9 Apr 2013 21:49:15 +0200 (CEST) X-Virus-Scanned: amavisd-new at Received: from zose-mta13.web4all.fr ([127.0.0.1]) by localhost (zose-mta13.web4all.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ms875Mf50L4E; Tue, 9 Apr 2013 21:49:14 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by zose-mta13.web4all.fr (Postfix) with ESMTP id B02BF6A0E1; Tue, 9 Apr 2013 21:49:14 +0200 (CEST) X-Virus-Scanned: amavisd-new at Received: from zose-mta13.web4all.fr ([127.0.0.1]) by localhost (zose-mta13.web4all.fr [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id XB1fm_dSHFuF; Tue, 9 Apr 2013 21:49:14 +0200 (CEST) Received: from advdt005-ubuntu.?none? (cie44-1-88-188-188-98.fbx.proxad.net [88.188.188.98]) by zose-mta13.web4all.fr (Postfix) with ESMTPA id F11BE6A0DD; Tue, 9 Apr 2013 21:49:13 +0200 (CEST) From: =?UTF-8?q?Beno=C3=AEt=20Th=C3=A9baudeau?= To: u-boot@lists.denx.de, Scott Wood , Stefano Babic , Albert Aribaud Date: Tue, 9 Apr 2013 21:48:58 +0200 Message-Id: <1365536939-5755-29-git-send-email-benoit.thebaudeau@advansee.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1365536939-5755-1-git-send-email-benoit.thebaudeau@advansee.com> References: <1365536939-5755-1-git-send-email-benoit.thebaudeau@advansee.com> MIME-Version: 1.0 Subject: [U-Boot] [PATCH v11 29/30] arm1176: Remove unused MMU setup from start.S X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.11 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: u-boot-bounces@lists.denx.de Errors-To: u-boot-bounces@lists.denx.de Following the removal of the smdk6400 board, the MMU setup code in arm1176/start.S becomes unused, so remove it. It will still be possible to restore it later from the Git history if necessary, in which case it should be moved out of the relocate_code() function. Signed-off-by: Benoît Thébaudeau --- Changes in v11: None Changes in v10: None Changes in v9: - Do not use "scrapyard" in patch description because this is reserved to refer to the board scrapyard file. Changes in v8: - New patch. Changes in v7: None Changes in v6: None Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None arch/arm/cpu/arm1176/start.S | 91 +----------------------------------------- 1 file changed, 1 insertion(+), 90 deletions(-) diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S index a7cf728..1fc1da0 100644 --- a/arch/arm/cpu/arm1176/start.S +++ b/arch/arm/cpu/arm1176/start.S @@ -33,11 +33,8 @@ #include #include #include -#ifdef CONFIG_ENABLE_MMU -#include -#endif -#if !defined(CONFIG_ENABLE_MMU) && !defined(CONFIG_SYS_PHY_UBOOT_BASE) +#ifndef CONFIG_SYS_PHY_UBOOT_BASE #define CONFIG_SYS_PHY_UBOOT_BASE CONFIG_SYS_UBOOT_BASE #endif @@ -105,14 +102,6 @@ _TEXT_BASE: #endif /* - * Below variable is very important because we use MMU in U-Boot. - * Without it, we cannot run code correctly before MMU is ON. - * by scsuh. - */ -_TEXT_PHY_BASE: - .word CONFIG_SYS_PHY_UBOOT_BASE - -/* * These are defined in the board-specific linker script. * Subtracting _start from them lets the linker put their * relative position in the executable instead of leaving @@ -298,44 +287,6 @@ fixnext: blo fixloop #endif -#ifdef CONFIG_ENABLE_MMU -enable_mmu: - /* enable domain access */ - ldr r5, =0x0000ffff - mcr p15, 0, r5, c3, c0, 0 /* load domain access register */ - - /* Set the TTB register */ - ldr r0, _mmu_table_base - ldr r1, =CONFIG_SYS_PHY_UBOOT_BASE - ldr r2, =0xfff00000 - bic r0, r0, r2 - orr r1, r0, r1 - mcr p15, 0, r1, c2, c0, 0 - - /* Enable the MMU */ - mrc p15, 0, r0, c1, c0, 0 - orr r0, r0, #1 /* Set CR_M to enable MMU */ - - /* Prepare to enable the MMU */ - adr r1, skip_hw_init - and r1, r1, #0x3fc - ldr r2, _TEXT_BASE - ldr r3, =0xfff00000 - and r2, r2, r3 - orr r2, r2, r1 - b mmu_enable - - .align 5 - /* Run in a single cache-line */ -mmu_enable: - - mcr p15, 0, r0, c1, c0, 0 - nop - nop - mov pc, r2 -skip_hw_init: -#endif - relocate_done: bx lr @@ -347,11 +298,6 @@ _rel_dyn_end_ofs: _dynsym_start_ofs: .word __dynsym_start - _start -#ifdef CONFIG_ENABLE_MMU -_mmu_table_base: - .word mmu_table -#endif - .globl c_runtime_cpu_setup c_runtime_cpu_setup: @@ -359,41 +305,6 @@ c_runtime_cpu_setup: #ifndef CONFIG_SPL_BUILD /* - * we assume that cache operation is done before. (eg. cleanup_before_linux()) - * actually, we don't need to do anything about cache if not use d-cache in - * U-Boot. So, in this function we clean only MMU. by scsuh - * - * void theLastJump(void *kernel, int arch_num, uint boot_params); - */ -#ifdef CONFIG_ENABLE_MMU - .globl theLastJump -theLastJump: - mov r9, r0 - ldr r3, =0xfff00000 - ldr r4, _TEXT_PHY_BASE - adr r5, phy_last_jump - bic r5, r5, r3 - orr r5, r5, r4 - mov pc, r5 -phy_last_jump: - /* - * disable MMU stuff - */ - mrc p15, 0, r0, c1, c0, 0 - bic r0, r0, #0x00002300 /* clear bits 13, 9:8 (--V- --RS) */ - bic r0, r0, #0x00000087 /* clear bits 7, 2:0 (B--- -CAM) */ - orr r0, r0, #0x00000002 /* set bit 2 (A) Align */ - orr r0, r0, #0x00001000 /* set bit 12 (I) I-Cache */ - mcr p15, 0, r0, c1, c0, 0 - - mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */ - - mov r0, #0 - mov pc, r9 -#endif - - -/* ************************************************************************* * * Interrupt handling