[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH V4 04/32] xen/arm: Add helpers ioreadl/iowritel
Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx> Changes in v5: - Use functions from linux code --- xen/include/asm-arm/arm32/io.h | 46 ++++++++++++++++++++++++++++++++++++++++ xen/include/asm-arm/arm64/io.h | 38 +++++++++++++++++++++++++++++++++ xen/include/asm-arm/mm.h | 8 +++++++ 3 files changed, 92 insertions(+) create mode 100644 xen/include/asm-arm/arm32/io.h create mode 100644 xen/include/asm-arm/arm64/io.h diff --git a/xen/include/asm-arm/arm32/io.h b/xen/include/asm-arm/arm32/io.h new file mode 100644 index 0000000..0d6da1f --- /dev/null +++ b/xen/include/asm-arm/arm32/io.h @@ -0,0 +1,46 @@ +/* + * Based on linux arch/arm/include/asm/io.h + * + * Copyright (C) 1996-2000 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Modifications: + * 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both + * constant addresses and variable addresses. + * 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture + * specific IO header files. + * 27-Mar-1999 PJB Second parameter of memcpy_toio is const.. + * 04-Apr-1999 PJB Added check_signature. + * 12-Dec-1999 RMK More cleanups + * 18-Jun-2000 RMK Removed virt_to_* and friends definitions + * 05-Oct-2004 BJD Moved memory string functions to use void __iomem + */ +#ifndef _ARM_ARM32_IO_H +#define _ARM_ARM32_IO_H + +#include <asm/system.h> + +static inline uint32_t ioreadl(const volatile void __iomem *addr) +{ + uint32_t val; + + asm volatile("ldr %1, %0" + : "+Qo" (*(volatile uint32_t __force *)addr), + "=r" (val)); + dsb(); + + return val; +} + +static inline void iowritel(const volatile void __iomem *addr, uint32_t val) +{ + dsb(); + asm volatile("str %1, %0" + : "+Qo" (*(volatile uint32_t __force *)addr) + : "r" (val)); +} + +#endif /* _ARM_ARM32_IO_H */ diff --git a/xen/include/asm-arm/arm64/io.h b/xen/include/asm-arm/arm64/io.h new file mode 100644 index 0000000..ec041cd --- /dev/null +++ b/xen/include/asm-arm/arm64/io.h @@ -0,0 +1,38 @@ +/* + * Based on linux arch/arm64/include/asm/io.h + * + * Copyright (C) 1996-2000 Russell King + * Copyright (C) 2012 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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, see <http://www.gnu.org/licenses/>. + */ +#ifndef _ARM_ARM64_IO_H +#define _ARM_ARM64_IO_H + +static inline uint32_t ioreadl(const volatile void __iomem *addr) +{ + uint32_t val; + + asm volatile("ldr %w0, [%1]" : "=r" (val) : "r" (addr)); + dsb(); + + return val; +} + +static inline void iowritel(const volatile void __iomem *addr, uint32_t val) +{ + dsb(); + asm volatile("str %w0, [%1]" : : "r" (val), "r" (addr)); +} + +#endif /* _ARM_ARM64_IO_H */ diff --git a/xen/include/asm-arm/mm.h b/xen/include/asm-arm/mm.h index 63e1069..5e7c5a3 100644 --- a/xen/include/asm-arm/mm.h +++ b/xen/include/asm-arm/mm.h @@ -6,6 +6,14 @@ #include <asm/page.h> #include <public/xen.h> +#if defined(CONFIG_ARM_32) +# include <asm/arm32/io.h> +#elif defined(CONFIG_ARM_64) +# include <asm/arm64/io.h> +#else +# error "unknown ARM variant" +#endif + /* Align Xen to a 2 MiB boundary. */ #define XEN_PADDR_ALIGN (1 << 21) -- 1.7.10.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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