Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 1 | #ifndef ARCH_PPC_H |
Akash Verma | 9ddf943 | 2013-10-11 10:24:26 -0600 | [diff] [blame] | 2 | #define ARCH_PPC_H |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 3 | |
Jens Axboe | 4247d1a | 2013-02-26 14:43:02 +0100 | [diff] [blame] | 4 | #include <unistd.h> |
5 | #include <stdlib.h> | ||||
6 | #include <sys/types.h> | ||||
7 | #include <sys/wait.h> | ||||
8 | |||||
Jens Axboe | cca8464 | 2011-10-07 12:47:57 +0200 | [diff] [blame] | 9 | #define FIO_ARCH (arch_ppc) |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 10 | |
11 | #ifndef __NR_ioprio_set | ||||
12 | #define __NR_ioprio_set 273 | ||||
13 | #define __NR_ioprio_get 274 | ||||
14 | #endif | ||||
15 | |||||
16 | #ifndef __NR_fadvise64 | ||||
17 | #define __NR_fadvise64 233 | ||||
18 | #endif | ||||
19 | |||||
Jens Axboe | 8756e4d | 2006-05-27 20:24:53 +0200 | [diff] [blame] | 20 | #ifndef __NR_sys_splice |
21 | #define __NR_sys_splice 283 | ||||
22 | #define __NR_sys_tee 284 | ||||
23 | #define __NR_sys_vmsplice 285 | ||||
24 | #endif | ||||
25 | |||||
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 26 | #define nop do { } while (0) |
27 | |||||
Jens Axboe | db6defc | 2007-12-11 08:55:53 +0100 | [diff] [blame] | 28 | #ifdef __powerpc64__ |
Jens Axboe | 44c47fe | 2008-06-04 14:31:25 +0200 | [diff] [blame] | 29 | #define read_barrier() __asm__ __volatile__ ("lwsync" : : : "memory") |
Jens Axboe | db6defc | 2007-12-11 08:55:53 +0100 | [diff] [blame] | 30 | #else |
Jens Axboe | 44c47fe | 2008-06-04 14:31:25 +0200 | [diff] [blame] | 31 | #define read_barrier() __asm__ __volatile__ ("sync" : : : "memory") |
Jens Axboe | db6defc | 2007-12-11 08:55:53 +0100 | [diff] [blame] | 32 | #endif |
33 | |||||
Jens Axboe | 44c47fe | 2008-06-04 14:31:25 +0200 | [diff] [blame] | 34 | #define write_barrier() __asm__ __volatile__ ("sync" : : : "memory") |
35 | |||||
Jens Axboe | 8f7e39d | 2008-06-01 19:45:10 +0200 | [diff] [blame] | 36 | static inline int __ilog2(unsigned long bitmask) |
37 | { | ||||
38 | int lz; | ||||
39 | |||||
40 | asm ("cntlzw %0,%1" : "=r" (lz) : "r" (bitmask)); | ||||
41 | return 31 - lz; | ||||
42 | } | ||||
43 | |||||
44 | static inline int arch_ffz(unsigned long bitmask) | ||||
45 | { | ||||
46 | if ((bitmask = ~bitmask) == 0) | ||||
47 | return 32; | ||||
48 | return __ilog2(bitmask & -bitmask); | ||||
49 | } | ||||
Cigy Cyriac | 5f39d8f | 2010-08-10 19:18:11 -0400 | [diff] [blame] | 50 | |
Jens Axboe | 4247d1a | 2013-02-26 14:43:02 +0100 | [diff] [blame] | 51 | static inline unsigned int mfspr(unsigned int reg) |
52 | { | ||||
53 | unsigned int val; | ||||
54 | |||||
55 | asm volatile("mfspr %0,%1": "=r" (val) : "K" (reg)); | ||||
56 | return val; | ||||
57 | } | ||||
58 | |||||
59 | #define SPRN_TBRL 0x10C /* Time Base Register Lower */ | ||||
60 | #define SPRN_TBRU 0x10D /* Time Base Register Upper */ | ||||
61 | #define SPRN_ATBL 0x20E /* Alternate Time Base Lower */ | ||||
62 | #define SPRN_ATBU 0x20F /* Alternate Time Base Upper */ | ||||
63 | |||||
Cigy Cyriac | 5f39d8f | 2010-08-10 19:18:11 -0400 | [diff] [blame] | 64 | static inline unsigned long long get_cpu_clock(void) |
65 | { | ||||
Jens Axboe | 2995607 | 2010-08-11 08:03:20 -0400 | [diff] [blame] | 66 | unsigned int tbl, tbu0, tbu1; |
67 | unsigned long long ret; | ||||
Cigy Cyriac | 5f39d8f | 2010-08-10 19:18:11 -0400 | [diff] [blame] | 68 | |
Jens Axboe | 2995607 | 2010-08-11 08:03:20 -0400 | [diff] [blame] | 69 | do { |
Jens Axboe | 4247d1a | 2013-02-26 14:43:02 +0100 | [diff] [blame] | 70 | if (arch_flags & ARCH_FLAG_1) { |
71 | tbu0 = mfspr(SPRN_ATBU); | ||||
72 | tbl = mfspr(SPRN_ATBL); | ||||
73 | tbu1 = mfspr(SPRN_ATBU); | ||||
74 | } else { | ||||
Steven Noonan | f2dc46a | 2013-02-28 20:08:06 +0100 | [diff] [blame] | 75 | tbu0 = mfspr(SPRN_TBRU); |
76 | tbl = mfspr(SPRN_TBRL); | ||||
77 | tbu1 = mfspr(SPRN_TBRU); | ||||
Jens Axboe | 4247d1a | 2013-02-26 14:43:02 +0100 | [diff] [blame] | 78 | } |
Jens Axboe | 2995607 | 2010-08-11 08:03:20 -0400 | [diff] [blame] | 79 | } while (tbu0 != tbu1); |
Cigy Cyriac | 5f39d8f | 2010-08-10 19:18:11 -0400 | [diff] [blame] | 80 | |
Jens Axboe | 2995607 | 2010-08-11 08:03:20 -0400 | [diff] [blame] | 81 | ret = (((unsigned long long)tbu0) << 32) | tbl; |
82 | return ret; | ||||
Cigy Cyriac | 5f39d8f | 2010-08-10 19:18:11 -0400 | [diff] [blame] | 83 | } |
84 | |||||
Sumanth K | f8d8d80 | 2014-06-16 11:08:16 +0530 | [diff] [blame] | 85 | #if 0 |
Jens Axboe | 4247d1a | 2013-02-26 14:43:02 +0100 | [diff] [blame] | 86 | static void atb_child(void) |
87 | { | ||||
88 | arch_flags |= ARCH_FLAG_1; | ||||
89 | get_cpu_clock(); | ||||
90 | _exit(0); | ||||
91 | } | ||||
92 | |||||
93 | static void atb_clocktest(void) | ||||
94 | { | ||||
95 | pid_t pid; | ||||
96 | |||||
97 | pid = fork(); | ||||
98 | if (!pid) | ||||
99 | atb_child(); | ||||
Jens Axboe | 6244334 | 2013-02-26 16:11:49 +0100 | [diff] [blame] | 100 | else if (pid != -1) { |
Jens Axboe | 4247d1a | 2013-02-26 14:43:02 +0100 | [diff] [blame] | 101 | int status; |
102 | |||||
Jens Axboe | 6244334 | 2013-02-26 16:11:49 +0100 | [diff] [blame] | 103 | pid = wait(&status); |
104 | if (pid == -1 || !WIFEXITED(status)) | ||||
Jens Axboe | 4247d1a | 2013-02-26 14:43:02 +0100 | [diff] [blame] | 105 | arch_flags &= ~ARCH_FLAG_1; |
106 | else | ||||
107 | arch_flags |= ARCH_FLAG_1; | ||||
108 | } | ||||
109 | } | ||||
Sumanth K | f8d8d80 | 2014-06-16 11:08:16 +0530 | [diff] [blame] | 110 | #endif |
Jens Axboe | 4247d1a | 2013-02-26 14:43:02 +0100 | [diff] [blame] | 111 | |
Jens Axboe | 1b745f5 | 2012-12-10 08:36:35 +0100 | [diff] [blame] | 112 | #define ARCH_HAVE_INIT |
113 | extern int tsc_reliable; | ||||
Jens Axboe | 4247d1a | 2013-02-26 14:43:02 +0100 | [diff] [blame] | 114 | |
Jens Axboe | 1b745f5 | 2012-12-10 08:36:35 +0100 | [diff] [blame] | 115 | static inline int arch_init(char *envp[]) |
116 | { | ||||
Jens Axboe | ddc0cc3 | 2013-10-11 10:27:28 -0600 | [diff] [blame] | 117 | #if 0 |
Jens Axboe | 1b745f5 | 2012-12-10 08:36:35 +0100 | [diff] [blame] | 118 | tsc_reliable = 1; |
Jens Axboe | 4247d1a | 2013-02-26 14:43:02 +0100 | [diff] [blame] | 119 | atb_clocktest(); |
Jens Axboe | ddc0cc3 | 2013-10-11 10:27:28 -0600 | [diff] [blame] | 120 | #endif |
Bruce Cran | d20b2ca | 2012-12-20 13:59:56 +0000 | [diff] [blame] | 121 | return 0; |
Jens Axboe | 1b745f5 | 2012-12-10 08:36:35 +0100 | [diff] [blame] | 122 | } |
123 | |||||
Jens Axboe | 8f7e39d | 2008-06-01 19:45:10 +0200 | [diff] [blame] | 124 | #define ARCH_HAVE_FFZ |
Jens Axboe | d2d982d | 2013-08-09 09:17:09 -0600 | [diff] [blame] | 125 | |
126 | /* | ||||
127 | * We don't have it on all platforms, lets comment this out until we | ||||
128 | * can handle it more intelligently. | ||||
129 | * | ||||
130 | * #define ARCH_HAVE_CPU_CLOCK | ||||
131 | */ | ||||
Jens Axboe | 8f7e39d | 2008-06-01 19:45:10 +0200 | [diff] [blame] | 132 | |
Jens Axboe | ebac465 | 2005-12-08 15:25:21 +0100 | [diff] [blame] | 133 | #endif |