[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v4 03/21] arm/acpi: Add __acpi_map_table function for ARM
From: Shannon Zhao <shannon.zhao@xxxxxxxxxx> Implement __acpi_map_table function for ARM. Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx> --- V4: add __acpi_map_table function --- xen/arch/arm/Makefile | 1 + xen/arch/arm/acpi/Makefile | 1 + xen/arch/arm/acpi/lib.c | 52 ++++++++++++++++++++++++++++++++++++++++++++ xen/include/asm-arm/config.h | 2 ++ 4 files changed, 56 insertions(+) create mode 100644 xen/arch/arm/acpi/Makefile create mode 100644 xen/arch/arm/acpi/lib.c diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile index 2f050f5..21f74ac 100644 --- a/xen/arch/arm/Makefile +++ b/xen/arch/arm/Makefile @@ -2,6 +2,7 @@ subdir-$(arm32) += arm32 subdir-$(arm64) += arm64 subdir-y += platforms subdir-$(arm64) += efi +subdir-$(CONFIG_HAS_ACPI) += acpi obj-$(EARLY_PRINTK) += early_printk.o obj-y += cpu.o diff --git a/xen/arch/arm/acpi/Makefile b/xen/arch/arm/acpi/Makefile new file mode 100644 index 0000000..b5be22d --- /dev/null +++ b/xen/arch/arm/acpi/Makefile @@ -0,0 +1 @@ +obj-y += lib.o diff --git a/xen/arch/arm/acpi/lib.c b/xen/arch/arm/acpi/lib.c new file mode 100644 index 0000000..f817fe6 --- /dev/null +++ b/xen/arch/arm/acpi/lib.c @@ -0,0 +1,52 @@ +/* + * lib.c - Architecture-Specific Low-Level ACPI Support + * + * 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/acpi.h> +#include <xen/mm.h> +#include <asm/config.h> + +char *__acpi_map_table(paddr_t phys, unsigned long size) +{ + unsigned long base, offset, mapped_size; + int idx; + + offset = phys & (PAGE_SIZE - 1); + mapped_size = PAGE_SIZE - offset; + set_fixmap(FIX_ACPI_BEGIN, phys >> PAGE_SHIFT, PAGE_HYPERVISOR); + base = FIXMAP_ADDR(FIX_ACPI_BEGIN); + + /* + * Most cases can be covered by the below. + */ + idx = FIX_ACPI_BEGIN; + while (mapped_size < size) { + if (++idx > FIX_ACPI_END) + return NULL; /* cannot handle this */ + phys += PAGE_SIZE; + set_fixmap(idx, phys >> PAGE_SHIFT, PAGE_HYPERVISOR); + mapped_size += PAGE_SIZE; + } + + return ((char *) base + offset); +} diff --git a/xen/include/asm-arm/config.h b/xen/include/asm-arm/config.h index 1520b41..a7798cb 100644 --- a/xen/include/asm-arm/config.h +++ b/xen/include/asm-arm/config.h @@ -183,6 +183,8 @@ #define FIXMAP_GICC1 4 /* Interrupt controller: CPU registers (first page) */ #define FIXMAP_GICC2 5 /* Interrupt controller: CPU registers (second page) */ #define FIXMAP_GICH 6 /* Interrupt controller: virtual interface control registers */ +#define FIX_ACPI_BEGIN 7 /* Start mappings of ACPI tables */ +#define FIX_ACPI_END 10 /* End mappings of ACPI tables */ #define PAGE_SHIFT 12 -- 2.0.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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