diff options
Diffstat (limited to 'hwaccess_x86_io.h')
-rw-r--r-- | hwaccess_x86_io.h | 149 |
1 files changed, 15 insertions, 134 deletions
diff --git a/hwaccess_x86_io.h b/hwaccess_x86_io.h index 0d16fdde4..31d1e86c8 100644 --- a/hwaccess_x86_io.h +++ b/hwaccess_x86_io.h @@ -2,6 +2,8 @@ * This file is part of the flashrom project. * * Copyright (C) 2009 Carl-Daniel Hailfinger + * Copyright (C) 2022 secunet Security Networks AG + * (Written by Thomas Heijligen <thomas.heijligen@secunet.com) * * 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 @@ -13,144 +15,23 @@ * GNU General Public License for more details. */ +/* + * This file contains prototypes for x86 I/O Port access. + */ + #ifndef __HWACCESS_X86_IO_H__ #define __HWACCESS_X86_IO_H__ 1 -/* sys/io.h provides iopl(2) and x86 I/O port access functions (inb, outb etc). - * It is included in glibc (thus available also on debian/kFreeBSD) but also in other libcs that mimic glibc, - * e.g. musl and uclibc. Because we cannot detect the libc or existence of the header or of the instructions - * themselves safely in here we use some heuristic below: - * On Android we don't have the header file and no way for I/O port access at all. However, sys/glibc-syscalls.h - * refers to an iopl implementation and we therefore include at least that one for now. On non-Android we assume - * that a Linux system's libc has a suitable sys/io.h or (on non-Linux) we depend on glibc to offer it. */ -#if defined(__ANDROID__) -#include <sys/glibc-syscalls.h> -#elif defined(__linux__) || defined(__GLIBC__) -#include <sys/io.h> -#endif - -/* for iopl and outb under Solaris */ -#if defined (__sun) -#include <sys/sysi86.h> -#include <sys/psw.h> -#include <asm/sunddi.h> -#endif - -int rget_io_perms(void); - -/* Clarification about OUTB/OUTW/OUTL argument order: - * OUT[BWL](val, port) +#include <stdint.h> +/** */ +int rget_io_perms(void); -#if defined(__FreeBSD__) || defined(__DragonFly__) - /* Note that Debian/kFreeBSD (FreeBSD kernel with glibc) has conflicting - * out[bwl] definitions in machine/cpufunc.h and sys/io.h at least in some - * versions. Use machine/cpufunc.h only for plain FreeBSD/DragonFlyBSD. - */ - #include <sys/types.h> - #include <machine/cpufunc.h> - #define OUTB(x, y) do { u_int outb_tmp = (y); outb(outb_tmp, (x)); } while (0) - #define OUTW(x, y) do { u_int outw_tmp = (y); outw(outw_tmp, (x)); } while (0) - #define OUTL(x, y) do { u_int outl_tmp = (y); outl(outl_tmp, (x)); } while (0) - #define INB(x) __extension__ ({ u_int inb_tmp = (x); inb(inb_tmp); }) - #define INW(x) __extension__ ({ u_int inw_tmp = (x); inw(inw_tmp); }) - #define INL(x) __extension__ ({ u_int inl_tmp = (x); inl(inl_tmp); }) -#else - -#if defined (__sun) - /* Note different order for outb */ - #define OUTB(x,y) outb(y, x) - #define OUTW(x,y) outw(y, x) - #define OUTL(x,y) outl(y, x) - #define INB inb - #define INW inw - #define INL inl -#else - -#ifdef __DJGPP__ - -#include <pc.h> - - #define OUTB(x,y) outportb(y, x) - #define OUTW(x,y) outportw(y, x) - #define OUTL(x,y) outportl(y, x) - - #define INB inportb - #define INW inportw - #define INL inportl - -#else - -#if defined(__MACH__) && defined(__APPLE__) - /* Header is part of the DirectHW library. */ - #include <DirectHW/DirectHW.h> -#endif - - /* This is the usual glibc interface. */ - #define OUTB outb - #define OUTW outw - #define OUTL outl - #define INB inb - #define INW inw - #define INL inl -#endif -#endif -#endif - -#if defined(__NetBSD__) || defined (__OpenBSD__) - #if defined(__i386__) || defined(__x86_64__) - #include <sys/types.h> - #include <machine/sysarch.h> - #if defined(__NetBSD__) - #if defined(__i386__) - #define iopl i386_iopl - #elif defined(__x86_64__) - #define iopl x86_64_iopl - #endif - #elif defined (__OpenBSD__) - #if defined(__i386__) - #define iopl i386_iopl - #elif defined(__amd64__) - #define iopl amd64_iopl - #endif - #endif - -static inline void outb(uint8_t value, uint16_t port) -{ - __asm__ volatile ("outb %b0,%w1": :"a" (value), "Nd" (port)); -} - -static inline uint8_t inb(uint16_t port) -{ - uint8_t value; - __asm__ volatile ("inb %w1,%0":"=a" (value):"Nd" (port)); - return value; -} - -static inline void outw(uint16_t value, uint16_t port) -{ - __asm__ volatile ("outw %w0,%w1": :"a" (value), "Nd" (port)); -} - -static inline uint16_t inw(uint16_t port) -{ - uint16_t value; - __asm__ volatile ("inw %w1,%0":"=a" (value):"Nd" (port)); - return value; -} - -static inline void outl(uint32_t value, uint16_t port) -{ - __asm__ volatile ("outl %0,%w1": :"a" (value), "Nd" (port)); -} - -static inline uint32_t inl(uint16_t port) -{ - uint32_t value; - __asm__ volatile ("inl %1,%0":"=a" (value):"Nd" (port)); - return value; -} - #endif -#endif +void OUTB(uint8_t value, uint16_t port); +void OUTW(uint16_t value, uint16_t port); +void OUTL(uint32_t value, uint16_t port); +uint8_t INB(uint16_t port); +uint16_t INW(uint16_t port); +uint32_t INL(uint16_t port); #endif /* __HWACCESS_X86_IO_H__ */ |