2b72262b4f
I hereby relicense all my work on Sortix under the ISC license as below. All Sortix contributions by other people are already under this license, are not substantial enough to be copyrightable, or have been removed. All imported code from other projects is compatible with this license. All GPL licensed code from other projects had previously been removed. Copyright 2011-2016 Jonas 'Sortie' Termansen and contributors. Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
131 lines
3.1 KiB
C++
131 lines
3.1 KiB
C++
/*
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* Copyright (c) 2011, 2014 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* x86-family/x86-family.cpp
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* CPU stuff for the x86 CPU family.
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*/
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#include <errno.h>
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#include <msr.h>
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#include <stdint.h>
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#include <sortix/kernel/ioport.h>
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#include <sortix/kernel/kernel.h>
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#include <sortix/kernel/syscall.h>
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#include "gdt.h"
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namespace Sortix {
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namespace CPU {
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void Reboot()
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{
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// Keyboard interface IO port: data and control.
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const uint16_t KEYBOARD_INTERFACE = 0x64;
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// Keyboard IO port.
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const uint16_t KEYBOARD_IO = 0x60;
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// Keyboard data is in buffer (output buffer is empty) (bit 0).
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const uint8_t KEYBOARD_DATA = 1 << 0;
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// User data is in buffer (command buffer is empty) (bit 1).
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const uint8_t USER_DATA = 1 << 1;
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// Disable interrupts.
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asm volatile("cli");
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// Clear all keyboard buffers (output and command buffers).
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uint8_t byte;
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do
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{
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byte = inport8(KEYBOARD_INTERFACE);
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if ( byte & KEYBOARD_DATA )
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inport8(KEYBOARD_IO);
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} while ( byte & USER_DATA );
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// CPU reset command.
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uint8_t KEYBOARD_RESET_CPU = 0xFE;
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// Now pulse the CPU reset line and reset.
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outport8(KEYBOARD_INTERFACE, KEYBOARD_RESET_CPU);
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// If that didn't work, just halt.
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asm volatile("hlt");
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}
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void ShutDown()
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{
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// TODO: Unimplemented, just reboot.
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Reboot();
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}
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} // namespace CPU
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} // namespace Sortix
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namespace Sortix {
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uint64_t sys_rdmsr(uint32_t msrid)
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{
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switch ( msrid )
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{
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case MSRID_FSBASE:
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#if defined(__i386__)
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return GDT::GetFSBase();
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#elif defined(__x86_64__)
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return rdmsr(msrid);
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#endif
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case MSRID_GSBASE:
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#if defined(__i386__)
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return GDT::GetGSBase();
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#elif defined(__x86_64__)
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return rdmsr(msrid);
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#endif
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default:
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return errno = EPERM, UINT64_MAX;
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};
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}
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uint64_t sys_wrmsr(uint32_t msrid, uint64_t value)
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{
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switch ( msrid )
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{
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case MSRID_FSBASE:
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#if defined(__i386__)
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if ( UINT32_MAX < value )
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return errno = EINVAL, UINT64_MAX;
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return GDT::SetFSBase((uint32_t) value), value;
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#elif defined(__x86_64__)
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if ( value >> 48 != 0x0000 && value >> 48 != 0xFFFF )
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return errno = EINVAL, UINT64_MAX;
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return wrmsr(msrid, value);
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#endif
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case MSRID_GSBASE:
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#if defined(__i386__)
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if ( UINT32_MAX < value )
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return errno = EINVAL, UINT64_MAX;
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return GDT::SetGSBase((uint32_t) value), value;
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#elif defined(__x86_64__)
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if ( value >> 48 != 0x0000 && value >> 48 != 0xFFFF )
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return errno = EINVAL, UINT64_MAX;
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return wrmsr(msrid, value);
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#endif
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default:
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return errno = EPERM, UINT64_MAX;
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};
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}
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} // namespace Sortix
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