diff options
Diffstat (limited to 'src/arch/arm64')
| -rw-r--r-- | src/arch/arm64/include/arch/io.h | 181 | ||||
| -rw-r--r-- | src/arch/arm64/include/armv8/arch/arch_io.h | 68 |
2 files changed, 137 insertions, 112 deletions
diff --git a/src/arch/arm64/include/arch/io.h b/src/arch/arm64/include/arch/io.h index 49d851d350..cd75fb8920 100644 --- a/src/arch/arm64/include/arch/io.h +++ b/src/arch/arm64/include/arch/io.h @@ -1,137 +1,94 @@ /* - * Based on (linux) arch/arm/include/asm/io.h + * Originally imported from linux/include/asm-arm/io.h. This file has changed + * substantially since then. * - * Copyright (C) 1996-2000 Russell King - * Copyright (C) 2012 ARM Ltd. - * Copyright 2013 Google, Inc. + * Copyright 2013 Google Inc. + * 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. * - * 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/>. + * Modifications: + * 08-Apr-2013 G Replaced several macros with inlines for type safety. + * 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 */ -#ifndef __ASM_ARM_IO_H -#define __ASM_ARM_IO_H +#ifndef __ASM_ARM64_IO_H +#define __ASM_ARM64_IO_H -#include <types.h> #include <arch/byteorder.h> -#include <arch/barrier.h> +#include <arch/arch_io.h> +#include <stdint.h> /* - * Generic IO read/write. These perform native-endian accesses. - */ -static inline void __raw_writeb(u8 val, volatile void *addr) -{ - asm volatile("strb %w0, [%1]" : : "r" (val), "r" (addr)); -} - -static inline void __raw_writew(u16 val, volatile void *addr) -{ - asm volatile("strh %w0, [%1]" : : "r" (val), "r" (addr)); -} - -static inline void __raw_writel(u32 val, volatile void *addr) -{ - asm volatile("str %w0, [%1]" : : "r" (val), "r" (addr)); -} - -static inline void __raw_writeq(u64 val, volatile void *addr) -{ - asm volatile("str %0, [%1]" : : "r" (val), "r" (addr)); -} - -static inline u8 __raw_readb(const volatile void *addr) -{ - u8 val; - asm volatile("ldrb %w0, [%1]" : "=r" (val) : "r" (addr)); - return val; -} - -static inline u16 __raw_readw(const volatile void *addr) -{ - u16 val; - asm volatile("ldrh %w0, [%1]" : "=r" (val) : "r" (addr)); - return val; -} - -static inline u32 __raw_readl(const volatile void *addr) -{ - u32 val; - asm volatile("ldr %w0, [%1]" : "=r" (val) : "r" (addr)); - return val; -} - -static inline u64 __raw_readq(const volatile void *addr) -{ - u64 val; - asm volatile("ldr %0, [%1]" : "=r" (val) : "r" (addr)); - return val; -} - -/* IO barriers */ -#define __iormb() rmb() -#define __iowmb() wmb() - -#define mmiowb() do { } while (0) + * FIXME: These are to avoid breaking existing ARM code. We should eventually + * re-factor all code to specify the data length intended. + */ +#define readb(a) read8(a) +#define writeb(v,a) write8(v,a) +#define readl(a) read32(a) +#define writel(v,a) write32(v,a) /* - * Relaxed I/O memory access primitives. These follow the Device memory - * ordering rules but do not guarantee any ordering relative to Normal memory - * accesses. + * Clear and set bits in one shot. These macros can be used to clear and + * set multiple bits in a register using a single call. These macros can + * also be used to set a multiple-bit bit pattern using a mask, by + * specifying the mask in the 'clear' parameter and the new bit pattern + * in the 'set' parameter. */ -#define readb_relaxed(c) ({ u8 __u = __raw_readb(c); __u; }) -#define readw_relaxed(c) ({ u16 __u = le16_to_cpu((__force __le16)__raw_readw(c)); __u; }) -#define readl_relaxed(c) ({ u32 __u = le32_to_cpu((__force __le32)__raw_readl(c)); __u; }) -#define writeb_relaxed(v,c) ((void)__raw_writeb((v),(c))) -#define writew_relaxed(v,c) ((void)__raw_writew((__force u16)cpu_to_le16(v),(c))) -#define writel_relaxed(v,c) ((void)__raw_writel((__force u32)cpu_to_le32(v),(c))) +#define out_arch(type,endian,a,v) write##type(cpu_to_##endian(v),a) +#define in_arch(type,endian,a) endian##_to_cpu(read##type(a)) -/* - * I/O memory access primitives. Reads are ordered relative to any - * following Normal memory access. Writes are ordered relative to any prior - * Normal memory access. - */ -#define readb(c) ({ u8 __v = readb_relaxed(c); __iormb(); __v; }) -#define readw(c) ({ u16 __v = readw_relaxed(c); __iormb(); __v; }) -#define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(); __v; }) +#define out_le32(a,v) out_arch(l,le32,a,v) +#define out_le16(a,v) out_arch(w,le16,a,v) -#define writeb(v,c) ({ __iowmb(); writeb_relaxed((v),(c)); }) -#define writew(v,c) ({ __iowmb(); writew_relaxed((v),(c)); }) -#define writel(v,c) ({ __iowmb(); writel_relaxed((v),(c)); }) +#define in_le32(a) in_arch(l,le32,a) +#define in_le16(a) in_arch(w,le16,a) -#define inb_p(addr) inb(addr) -#define inw_p(addr) inw(addr) -#define inl_p(addr) inl(addr) +#define out_be32(a,v) out_arch(l,be32,a,v) +#define out_be16(a,v) out_arch(w,be16,a,v) -#define outb_p(x, addr) outb((x), (addr)) -#define outw_p(x, addr) outw((x), (addr)) -#define outl_p(x, addr) outl((x), (addr)) +#define in_be32(a) in_arch(l,be32,a) +#define in_be16(a) in_arch(w,be16,a) -#define insb_p(port,to,len) insb(port,to,len) -#define insw_p(port,to,len) insw(port,to,len) -#define insl_p(port,to,len) insl(port,to,len) +#define out_8(a,v) writeb(v,a) +#define in_8(a) readb(a) -#define outsb_p(port,from,len) outsb(port,from,len) -#define outsw_p(port,from,len) outsw(port,from,len) -#define outsl_p(port,from,len) outsl(port,from,len) +#define clrbits(type, addr, clear) \ + out_##type((addr), in_##type(addr) & ~(clear)) -/* - * String version of I/O memory access operations. - */ -extern void __memcpy_fromio(void *, const volatile void *, size_t); -extern void __memcpy_toio(volatile void *, const void *, size_t); -extern void __memset_io(volatile void *, int, size_t); +#define setbits(type, addr, set) \ + out_##type((addr), in_##type(addr) | (set)) + +#define clrsetbits(type, addr, clear, set) \ + out_##type((addr), (in_##type(addr) & ~(clear)) | (set)) + +#define clrbits_be32(addr, clear) clrbits(be32, addr, clear) +#define setbits_be32(addr, set) setbits(be32, addr, set) +#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set) + +#define clrbits_le32(addr, clear) clrbits(le32, addr, clear) +#define setbits_le32(addr, set) setbits(le32, addr, set) +#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set) + +#define clrbits_be16(addr, clear) clrbits(be16, addr, clear) +#define setbits_be16(addr, set) setbits(be16, addr, set) +#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set) + +#define clrbits_le16(addr, clear) clrbits(le16, addr, clear) +#define setbits_le16(addr, set) setbits(le16, addr, set) +#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set) -#define memset_io(c,v,l) __memset_io((c),(v),(l)) -#define memcpy_fromio(a,c,l) __memcpy_fromio((a),(c),(l)) -#define memcpy_toio(c,a,l) __memcpy_toio((c),(a),(l)) +#define clrbits_8(addr, clear) clrbits(8, addr, clear) +#define setbits_8(addr, set) setbits(8, addr, set) +#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set) -#endif /* __ASM_ARM_IO_H */ +#endif /* __ASM_ARM64_IO_H */ diff --git a/src/arch/arm64/include/armv8/arch/arch_io.h b/src/arch/arm64/include/armv8/arch/arch_io.h new file mode 100644 index 0000000000..56ed86dbf9 --- /dev/null +++ b/src/arch/arm64/include/armv8/arch/arch_io.h @@ -0,0 +1,68 @@ +/* + * Originally imported from linux/include/asm-arm/io.h. This file has changed + * substantially since then. + * + * Copyright 2014 Google Inc. + * 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: + * 08-Apr-2013 G Replaced several macros with inlines for type safety. + * 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 + */ +#ifndef __ASM_ARM64_ARCH_IO_H +#define __ASM_ARM64_ARCH_IO_H + +#include <arch/cache.h> /* for dmb() */ +#include <stdint.h> + +static inline uint8_t read8(const void *addr) +{ + dmb(); + return *(volatile uint8_t *)addr; +} + +static inline uint16_t read16(const void *addr) +{ + dmb(); + return *(volatile uint16_t *)addr; +} + +static inline uint32_t read32(const void *addr) +{ + dmb(); + return *(volatile uint32_t *)addr; +} + +static inline void write8(uint8_t val, void *addr) +{ + dmb(); + *(volatile uint8_t *)addr = val; + dmb(); +} + +static inline void write16(uint16_t val, void *addr) +{ + dmb(); + *(volatile uint16_t *)addr = val; + dmb(); +} + +static inline void write32(uint32_t val, void *addr) +{ + dmb(); + *(volatile uint32_t *)addr = val; + dmb(); +} + +#endif /* __ASM_ARM64_ARCH_IO_H */ |