From patchwork Mon Jul 1 18:20:35 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Santosh Shilimkar X-Patchwork-Id: 2809081 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id EADF2BF4A1 for ; Mon, 1 Jul 2013 18:22:24 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2427D20136 for ; Mon, 1 Jul 2013 18:22:20 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 634982009C for ; Mon, 1 Jul 2013 18:22:18 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Utijg-0003J4-UF; Mon, 01 Jul 2013 18:22:01 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Utije-0004Qc-4b; Mon, 01 Jul 2013 18:21:58 +0000 Received: from bear.ext.ti.com ([192.94.94.41]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UtijZ-0004Pr-AB for linux-arm-kernel@lists.infradead.org; Mon, 01 Jul 2013 18:21:55 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id r61IKeOS022182; Mon, 1 Jul 2013 13:20:40 -0500 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id r61IKe0i016233; Mon, 1 Jul 2013 13:20:40 -0500 Received: from dlelxv22.itg.ti.com (172.17.1.197) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.2.342.3; Mon, 1 Jul 2013 13:20:39 -0500 Received: from ula0393909.am.dhcp.ti.com (ula0393909.am.dhcp.ti.com [158.218.103.117]) by dlelxv22.itg.ti.com (8.13.8/8.13.8) with ESMTP id r61IKcs0010608; Mon, 1 Jul 2013 13:20:38 -0500 From: Santosh Shilimkar To: Subject: [PATCH v2] of: Specify initrd location using 64-bit Date: Mon, 1 Jul 2013 14:20:35 -0400 Message-ID: <1372702835-5333-1-git-send-email-santosh.shilimkar@ti.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130701_142153_682800_47A210EA X-CRM114-Status: GOOD ( 16.37 ) X-Spam-Score: -6.9 (------) Cc: Nicolas Pitre , linux-mips@linux-mips.org, Benjamin Herrenschmidt , Aurelien Jacquiot , Catalin Marinas , Sebastian Andrzej Siewior , Will Deacon , Max Filippov , Paul Mackerras , Jonas Bonn , Russell King , linux-c6x-dev@linux-c6x.org, x86@kernel.org, arm@kernel.org, Geert Uytterhoeven , Mark Salter , Jean-Christophe PLAGNIOL-VILLARD , linux-xtensa@linux-xtensa.org, James Hogan , devicetree-discuss@lists.ozlabs.org, Rob Herring , linux-arm-kernel@lists.infradead.org, Chris Zankel , Michal Simek , Vineet Gupta , Ralf Baechle , Santosh Shilimkar , linuxppc-dev@lists.ozlabs.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP On some PAE architectures, the entire range of physical memory could reside outside the 32-bit limit. These systems need the ability to specify the initrd location using 64-bit numbers. This patch globally modifies the early_init_dt_setup_initrd_arch() function to use 64-bit numbers instead of the current unsigned long. There has been quite a bit of debate about whether to use u64 or phys_addr_t. It was concluded to stick to u64 to be consistent with rest of the device tree code. As summarized by Geert, "The address to load the initrd is decided by the bootloader/user and set at that point later in time. The dtb should not be tied to the kernel you are booting" More details on the discussion can be found here: https://lkml.org/lkml/2013/6/20/690 https://lkml.org/lkml/2012/9/13/544 Cc: Grant Likely Cc: Rob Herring Cc: Geert Uytterhoeven Cc: Sebastian Andrzej Siewior Cc: Jean-Christophe PLAGNIOL-VILLARD Cc: Vineet Gupta Cc: Russell King Cc: Catalin Marinas Cc: Will Deacon Cc: Mark Salter Cc: Aurelien Jacquiot Cc: James Hogan Cc: Michal Simek Cc: Ralf Baechle Cc: Jonas Bonn Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: x86@kernel.org Cc: arm@kernel.org Cc: Chris Zankel Cc: Max Filippov Cc: bigeasy@linutronix.de Cc: robherring2@gmail.com Cc: Nicolas Pitre Cc: linux-arm-kernel@lists.infradead.org Cc: linux-c6x-dev@linux-c6x.org Cc: linux-mips@linux-mips.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-xtensa@linux-xtensa.org Cc: devicetree-discuss@lists.ozlabs.org Signed-off-by: Santosh Shilimkar Acked-by: Rob Herring Acked-by: Vineet Gupta [For arch/arc bits] Acked-by: Jean-Christophe PLAGNIOL-VILLARD --- arch/arc/mm/init.c | 5 ++--- arch/arm/mm/init.c | 2 +- arch/arm64/mm/init.c | 3 +-- arch/c6x/kernel/devicetree.c | 3 +-- arch/metag/mm/init.c | 5 ++--- arch/microblaze/kernel/prom.c | 3 +-- arch/mips/kernel/prom.c | 3 +-- arch/openrisc/kernel/prom.c | 3 +-- arch/powerpc/kernel/prom.c | 3 +-- arch/x86/kernel/devicetree.c | 3 +-- arch/xtensa/kernel/setup.c | 3 +-- drivers/of/fdt.c | 10 ++++++---- include/linux/of_fdt.h | 3 +-- 13 files changed, 20 insertions(+), 29 deletions(-) diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c index 4a17736..7991e08 100644 --- a/arch/arc/mm/init.c +++ b/arch/arc/mm/init.c @@ -157,9 +157,8 @@ void __init free_initrd_mem(unsigned long start, unsigned long end) #endif #ifdef CONFIG_OF_FLATTREE -void __init early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end) +void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) { - pr_err("%s(%lx, %lx)\n", __func__, start, end); + pr_err("%s(%llx, %llx)\n", __func__, start, end); } #endif /* CONFIG_OF_FLATTREE */ diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 9a5cdc0..afeaef7 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -76,7 +76,7 @@ static int __init parse_tag_initrd2(const struct tag *tag) __tagtable(ATAG_INITRD2, parse_tag_initrd2); #ifdef CONFIG_OF_FLATTREE -void __init early_init_dt_setup_initrd_arch(unsigned long start, unsigned long end) +void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) { phys_initrd_start = start; phys_initrd_size = end - start; diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index f497ca7..7047708 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -44,8 +44,7 @@ static unsigned long phys_initrd_size __initdata = 0; phys_addr_t memstart_addr __read_mostly = 0; -void __init early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end) +void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) { phys_initrd_start = start; phys_initrd_size = end - start; diff --git a/arch/c6x/kernel/devicetree.c b/arch/c6x/kernel/devicetree.c index bdb56f0..287d0e6 100644 --- a/arch/c6x/kernel/devicetree.c +++ b/arch/c6x/kernel/devicetree.c @@ -33,8 +33,7 @@ void __init early_init_devtree(void *params) #ifdef CONFIG_BLK_DEV_INITRD -void __init early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end) +void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) { initrd_start = (unsigned long)__va(start); initrd_end = (unsigned long)__va(end); diff --git a/arch/metag/mm/init.c b/arch/metag/mm/init.c index d05b845..bdc4811 100644 --- a/arch/metag/mm/init.c +++ b/arch/metag/mm/init.c @@ -419,10 +419,9 @@ void free_initrd_mem(unsigned long start, unsigned long end) #endif #ifdef CONFIG_OF_FLATTREE -void __init early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end) +void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) { - pr_err("%s(%lx, %lx)\n", + pr_err("%s(%llx, %llx)\n", __func__, start, end); } #endif /* CONFIG_OF_FLATTREE */ diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c index 0a2c68f..62e2e8f 100644 --- a/arch/microblaze/kernel/prom.c +++ b/arch/microblaze/kernel/prom.c @@ -136,8 +136,7 @@ void __init early_init_devtree(void *params) } #ifdef CONFIG_BLK_DEV_INITRD -void __init early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end) +void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) { initrd_start = (unsigned long)__va(start); initrd_end = (unsigned long)__va(end); diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c index 5712bb5..32b8788 100644 --- a/arch/mips/kernel/prom.c +++ b/arch/mips/kernel/prom.c @@ -58,8 +58,7 @@ void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) } #ifdef CONFIG_BLK_DEV_INITRD -void __init early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end) +void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) { initrd_start = (unsigned long)__va(start); initrd_end = (unsigned long)__va(end); diff --git a/arch/openrisc/kernel/prom.c b/arch/openrisc/kernel/prom.c index 5869e3f..150215a 100644 --- a/arch/openrisc/kernel/prom.c +++ b/arch/openrisc/kernel/prom.c @@ -96,8 +96,7 @@ void __init early_init_devtree(void *params) } #ifdef CONFIG_BLK_DEV_INITRD -void __init early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end) +void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) { initrd_start = (unsigned long)__va(start); initrd_end = (unsigned long)__va(end); diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 8b6f7a9..2f3e252 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -550,8 +550,7 @@ void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) } #ifdef CONFIG_BLK_DEV_INITRD -void __init early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end) +void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) { initrd_start = (unsigned long)__va(start); initrd_end = (unsigned long)__va(end); diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c index b158152..2fbad6b 100644 --- a/arch/x86/kernel/devicetree.c +++ b/arch/x86/kernel/devicetree.c @@ -52,8 +52,7 @@ void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) } #ifdef CONFIG_BLK_DEV_INITRD -void __init early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end) +void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) { initrd_start = (unsigned long)__va(start); initrd_end = (unsigned long)__va(end); diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c index 6dd25ec..d45e602 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -170,8 +170,7 @@ static int __init parse_tag_fdt(const bp_tag_t *tag) __tagtable(BP_TAG_FDT, parse_tag_fdt); -void __init early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end) +void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) { initrd_start = (void *)__va(start); initrd_end = (void *)__va(end); diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index 808be06..21123b8 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -550,7 +550,8 @@ int __init of_flat_dt_match(unsigned long node, const char *const *compat) */ void __init early_init_dt_check_for_initrd(unsigned long node) { - unsigned long start, end, len; + u64 start, end; + unsigned long len; __be32 *prop; pr_debug("Looking for initrd properties... "); @@ -558,15 +559,16 @@ void __init early_init_dt_check_for_initrd(unsigned long node) prop = of_get_flat_dt_prop(node, "linux,initrd-start", &len); if (!prop) return; - start = of_read_ulong(prop, len/4); + start = of_read_number(prop, len/4); prop = of_get_flat_dt_prop(node, "linux,initrd-end", &len); if (!prop) return; - end = of_read_ulong(prop, len/4); + end = of_read_number(prop, len/4); early_init_dt_setup_initrd_arch(start, end); - pr_debug("initrd_start=0x%lx initrd_end=0x%lx\n", start, end); + pr_debug("initrd_start=0x%llx initrd_end=0x%llx\n", + (unsigned long long)start, (unsigned long long)end); } #else inline void early_init_dt_check_for_initrd(unsigned long node) diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h index ed136ad..4a17939 100644 --- a/include/linux/of_fdt.h +++ b/include/linux/of_fdt.h @@ -106,8 +106,7 @@ extern u64 dt_mem_next_cell(int s, __be32 **cellp); * physical addresses. */ #ifdef CONFIG_BLK_DEV_INITRD -extern void early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end); +extern void early_init_dt_setup_initrd_arch(u64 start, u64 end); #endif /* Early flat tree scan hooks */