diff options
| -rw-r--r-- | src/sys/arch/amd64/os/os_reboot.c | 83 | ||||
| -rw-r--r-- | src/sys/include/sys/reboot.h | 45 |
2 files changed, 128 insertions, 0 deletions
diff --git a/src/sys/arch/amd64/os/os_reboot.c b/src/sys/arch/amd64/os/os_reboot.c new file mode 100644 index 0000000..e414822 --- /dev/null +++ b/src/sys/arch/amd64/os/os_reboot.c @@ -0,0 +1,83 @@ +/* + * Copyright (c) 2025 Ian Marco Moffett and L5 engineers + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <sys/types.h> +#include <sys/reboot.h> +#include <sys/cdefs.h> +#include <os/reboot.h> +#include <machine/pio.h> + +/* + * Actual reboot core + */ +__dead static void +__reboot(void) +{ + void *dmmy_null = NULL; + + /* + * Try to be gentle and simply put the CPU into a + * reboot cycle through the i8042 reset line, though + * some chipsets may not like this. + */ + outb(0x64, 0xFE); + + /* + * If somehow nothing we've tried worked, be very + * violent and force it to reboot via faulty IDT. + */ + __ASMV( + "lidt %0\n" + "int $0\n" + : + : "m" (dmmy_null) + : "memory" + ); + + __builtin_unreachable(); +} + +void +reboot(int method) +{ + __reboot(); + __builtin_unreachable(); +} + +/* + * ARG0: Method + */ +scret_t +sys_reboot(struct syscall_args *scargs) +{ + int method = SCARG(scargs, int, 0); + + reboot(method); + __builtin_unreachable(); +} diff --git a/src/sys/include/sys/reboot.h b/src/sys/include/sys/reboot.h new file mode 100644 index 0000000..539eeab --- /dev/null +++ b/src/sys/include/sys/reboot.h @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2025 Ian Marco Moffett and L5 engineers + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _SYS_REBOOT_H_ +#define _SYS_REBOOT_H_ + +#include <sys/types.h> +#include <sys/cdefs.h> + +#define RB_RESET 0x0000 + +/* + * Reboot the system + * + * @method: What should be done + */ +__dead void reboot(int method); + +#endif /* !_SYS_REBOOT_H_ */ |