[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v3 09/62] arm/acpi: Add basic ACPI initialization
From: Parth Dixit <parth.dixit@xxxxxxxxxx> 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 <naresh.bhat@xxxxxxxxxx> Signed-off-by: Parth Dixit <parth.dixit@xxxxxxxxxx> Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx> --- xen/arch/arm/acpi/Makefile | 1 + xen/arch/arm/acpi/boot.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++ xen/arch/arm/setup.c | 4 +++ 3 files changed, 67 insertions(+) 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..ad51afc --- /dev/null +++ b/xen/arch/arm/acpi/boot.c @@ -0,0 +1,62 @@ +/* + * ARM Specific Low-Level ACPI Boot Support + * + * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@xxxxxxxxx> + * Copyright (C) 2001 Jun Nakajima <jun.nakajima@xxxxxxxxx> + * Copyright (C) 2014, Naresh Bhat <naresh.bhat@xxxxxxxxxx> + * Copyright (C) 2015, Shannon Zhao <shannon.zhao@xxxxxxxxxx> + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * 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 <xen/init.h> +#include <xen/acpi.h> + +#include <asm/acpi.h> + +/* + * 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 + * + * return value: (currently ignored) + * 0: success + * !0: failure + * + * 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 3b29904..768312f 100644 --- a/xen/arch/arm/setup.c +++ b/xen/arch/arm/setup.c @@ -36,6 +36,7 @@ #include <xen/pfn.h> #include <xen/vmap.h> #include <xen/libfdt/libfdt.h> +#include <xen/acpi.h> #include <asm/page.h> #include <asm/current.h> #include <asm/setup.h> @@ -753,6 +754,9 @@ void __init start_xen(unsigned long boot_phys_offset, setup_mm(fdt_paddr, fdt_size); + /* Parse the ACPI tables for possible boot-time configuration */ + acpi_boot_table_init(); + vm_init(); dt_unflatten_host_device_tree(); -- 2.1.0 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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