| /* | |
| * Copyright 2014, Michael Ellerman, IBM Corp. | |
| * Licensed under GPLv2. | |
| */ | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include "ebb.h" | |
| /* | |
| * Test basic access to the EBB regs, they should be user accessible with no | |
| * kernel interaction required. | |
| */ | |
| int reg_access(void) | |
| { | |
| uint64_t val, expected; | |
| SKIP_IF(!ebb_is_supported()); | |
| expected = 0x8000000100000000ull; | |
| mtspr(SPRN_BESCR, expected); | |
| val = mfspr(SPRN_BESCR); | |
| FAIL_IF(val != expected); | |
| expected = 0x0000000001000000ull; | |
| mtspr(SPRN_EBBHR, expected); | |
| val = mfspr(SPRN_EBBHR); | |
| FAIL_IF(val != expected); | |
| return 0; | |
| } | |
| int main(void) | |
| { | |
| return test_harness(reg_access, "reg_access"); | |
| } |