| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright © International Business Machines Corp., 2006-2008 |
| * |
| * AUTHOR |
| * Darren Hart <dvhltc@us.ibm.com> |
| * Giuseppe Cavallaro <peppe.cavallarost.com> |
| * |
| * HISTORY |
| * It directly comes from the librttest.h (see its HISTORY). |
| */ |
| |
| #ifndef TST_TSC_H |
| #define TST_TSC_H |
| |
| #undef TSC_UNSUPPORTED |
| |
| /* TSC macros */ |
| #if defined(__i386__) |
| #define rdtscll(val) __asm__ __volatile__("rdtsc" : "=A" (val)) |
| #elif defined(__x86_64__) |
| #define rdtscll(val) \ |
| do { \ |
| uint32_t low, high; \ |
| __asm__ __volatile__ ("rdtsc" : "=a" (low), "=d" (high)); \ |
| val = (uint64_t)high << 32 | low; \ |
| } while (0) |
| #elif defined(__powerpc__) |
| #if defined(__powerpc64__) /* 64bit version */ |
| #define rdtscll(val) \ |
| do { \ |
| __asm__ __volatile__ ("mfspr %0, 268" : "=r" (val)); \ |
| } while (0) |
| #else /*__powerpc__ 32bit version */ |
| #define rdtscll(val) \ |
| do { \ |
| uint32_t tbhi, tblo ; \ |
| __asm__ __volatile__ ("mftbu %0" : "=r" (tbhi)); \ |
| __asm__ __volatile__ ("mftbl %0" : "=r" (tblo)); \ |
| val = 1000 * ((uint64_t) tbhi << 32) | tblo; \ |
| } while (0) |
| #endif |
| #else |
| #warning TSC UNSUPPORTED |
| /* All tests will be compiled also for the |
| * architecture without TSC support (e.g. SH). |
| * At run-time these will fail with ENOTSUP. |
| */ |
| #define rdtscll(val) do { } while (0) |
| #define TSC_UNSUPPORTED |
| #endif |
| |
| #endif |
