mirror of
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92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
//=======================================================================
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// Copyright Baptiste Wicht 2013-2016.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//=======================================================================
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#ifndef KERNEL_UTILS_H
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#define KERNEL_UTILS_H
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#include <types.hpp>
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inline uint8_t in_byte(uint16_t _port){
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uint8_t rv;
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asm volatile ("in %[data], %[port]"
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: [data] "=a" (rv)
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: [port] "dN" (_port));
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return rv;
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}
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inline uint16_t in_word(uint16_t _port){
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uint16_t rv;
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asm volatile ("in %[data], %[port]"
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: [data] "=a" (rv)
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: [port] "dN" (_port));
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return rv;
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}
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inline uint32_t in_dword(uint16_t _port){
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uint32_t rv;
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asm volatile ("in %[data], %[port]"
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: [data] "=a" (rv)
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: [port] "dN" (_port));
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return rv;
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}
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inline uint64_t in_qword(uint16_t _port){
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uint64_t rv;
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asm volatile ("in %[data], %[port]"
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: [data] "=a" (rv)
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: [port] "dN" (_port));
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return rv;
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}
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inline void out_byte (uint16_t _port, uint8_t _data){
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asm volatile ("out %[port], %[data]"
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: /* No outputs */
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: [port] "dN" (_port), [data] "a" (_data));
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}
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inline void out_word(uint16_t _port, uint16_t _data){
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asm volatile ("out %[port], %[data]"
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: /* No outputs */
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: [port] "dN" (_port), [data] "a" (_data));
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}
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inline void out_dword(uint16_t _port, uint32_t _data){
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asm volatile ("out %[port], %[data]"
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: /* No outputs */
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: [port] "dN" (_port), [data] "a" (_data));
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}
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inline void out_qword(uint16_t _port, uint64_t _data){
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asm volatile ("out %[port], %[data]"
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: /* No outputs */
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: [port] "dN" (_port), [data] "a" (_data));
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}
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inline uint16_t switch_endian_16(uint16_t nb) {
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return (nb>>8) | (nb<<8);
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}
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inline uint32_t switch_endian_32(uint32_t nb) {
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return ((nb>>24)&0xff) |
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((nb<<8)&0xff0000) |
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((nb>>8)&0xff00) |
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((nb<<24)&0xff000000);
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}
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void print_stack(const char* msg, size_t check);
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#define SHOW_STACK(M) { size_t check = 0; asm volatile("mov %0, rsp;" : "=r" (check)); print_stack(((M)), check); }
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#endif
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