| /* |
| * Generic exception handlers for registration and use in tests |
| * |
| * Copyright 2016 Suraj Jitindar Singh, IBM. |
| * |
| * This work is licensed under the terms of the GNU LGPL, version 2. |
| */ |
| |
| #include <libcflat.h> |
| #include <asm/handlers.h> |
| #include <asm/ptrace.h> |
| |
| /* |
| * Generic handler for decrementer exceptions (0x900) |
| * Just reset the decrementer back to the value specified when registering the |
| * handler |
| */ |
| void dec_except_handler(struct pt_regs *regs __unused, void *data) |
| { |
| uint64_t dec = *((uint64_t *) data); |
| |
| asm volatile ("mtdec %0" : : "r" (dec)); |
| } |
