From mboxrd@z Thu Jan 1 00:00:00 1970 From: Parth Dixit Subject: [PATCH v2 06/41] arm/acpi : Add basic ACPI initialization Date: Mon, 18 May 2015 01:33:33 +0530 Message-ID: <1431893048-5214-7-git-send-email-parth.dixit@linaro.org> References: <1431893048-5214-1-git-send-email-parth.dixit@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1431893048-5214-1-git-send-email-parth.dixit@linaro.org> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org Cc: keir@xen.org, ian.campbell@citrix.com, andrew.cooper3@citrix.com, tim@xen.org, julien.grall@citrix.com, stefano.stabellini@citrix.com, jbeulich@suse.com, parth.dixit@linaro.org, christoffer.dall@linaro.org List-Id: xen-devel@lists.xenproject.org acpi_boot_table_init() will be called in start_xen to get the RSDP and all the table pointers. with this patch, we can get ACPI boot-time tables from firmware on ARM64. Signed-off-by: Naresh Bhat Signed-off-by: Parth Dixit --- xen/arch/arm/acpi/Makefile | 1 + xen/arch/arm/acpi/boot.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++ xen/arch/arm/setup.c | 13 +++++++++-- 3 files changed, 68 insertions(+), 2 deletions(-) create mode 100644 xen/arch/arm/acpi/boot.c diff --git a/xen/arch/arm/acpi/Makefile b/xen/arch/arm/acpi/Makefile index b5be22d..196c40a 100644 --- a/xen/arch/arm/acpi/Makefile +++ b/xen/arch/arm/acpi/Makefile @@ -1 +1,2 @@ obj-y += lib.o +obj-y += boot.o diff --git a/xen/arch/arm/acpi/boot.c b/xen/arch/arm/acpi/boot.c new file mode 100644 index 0000000..8dc69d5 --- /dev/null +++ b/xen/arch/arm/acpi/boot.c @@ -0,0 +1,56 @@ +/* + * ARM64 Specific Low-Level ACPI Boot Support + * + * Copyright (C) 2014, Naresh Bhat + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + */ + +#include +#include + +#include + +/* + * acpi_boot_table_init() called from setup_arch(), always. + * 1. find RSDP and get its address, and then find XSDT + * 2. extract all tables and checksums them all + * + * We can parse ACPI boot-time tables such as FADT, MADT after + * this function is called. + */ +int __init acpi_boot_table_init(void) +{ + int error; + + /* If acpi_disabled, bail out */ + if ( acpi_disabled ) + return 1; + + /* Initialize the ACPI boot-time table parser. */ + error = acpi_table_init(); + if ( error ) + { + disable_acpi(); + return error; + } + + return 0; +} + diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c index 06f8e54..5711077 100644 --- a/xen/arch/arm/setup.c +++ b/xen/arch/arm/setup.c @@ -36,6 +36,7 @@ #include #include #include +#include #include #include #include @@ -45,10 +46,12 @@ #include #include #include +#include struct bootinfo __initdata bootinfo; struct cpuinfo_arm __read_mostly boot_cpu_data; +bool_t acpi_disabled; #ifdef CONFIG_ARM_32 static unsigned long opt_xenheap_megabytes __initdata; @@ -610,7 +613,6 @@ static void __init setup_mm(unsigned long dtb_paddr, size_t dtb_size) init_xenheap_pages(pfn_to_paddr(xenheap_mfn_start), pfn_to_paddr(boot_mfn_start)); - end_boot_allocator(); } #else /* CONFIG_ARM_64 */ static void __init setup_mm(unsigned long dtb_paddr, size_t dtb_size) @@ -680,7 +682,6 @@ static void __init setup_mm(unsigned long dtb_paddr, size_t dtb_size) setup_frametable_mappings(ram_start, ram_end); max_page = PFN_DOWN(ram_end); - end_boot_allocator(); } #endif @@ -751,6 +752,14 @@ void __init start_xen(unsigned long boot_phys_offset, setup_mm(fdt_paddr, fdt_size); + /* + * Parse the ACPI tables for possible boot-time configuration + */ + if( !acpi_disabled ) + acpi_boot_table_init(); + + end_boot_allocator(); + vm_init(); dt_unflatten_host_device_tree(); -- 1.9.1