devtime.c (1051:d71e55bdc654) | devtime.c (1053:2c6d9e60541b) |
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1/* 2 * Copyright (c) 2004 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; --- 40 unchanged lines hidden (view full) --- 49static char *dataAddr = NULL; 50static int count = 0; 51 52static inline uint32_t cycleCounter(uint32_t dep); 53 54static int __init devtime_start(void) 55{ 56 uint64_t addr; | 1/* 2 * Copyright (c) 2004 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; --- 40 unchanged lines hidden (view full) --- 49static char *dataAddr = NULL; 50static int count = 0; 51 52static inline uint32_t cycleCounter(uint32_t dep); 53 54static int __init devtime_start(void) 55{ 56 uint64_t addr; |
57 uint32_t t1, t2; | 57 uint32_t t1, t2; |
58 uint32_t trash; 59 int x; 60 uint32_t *times; 61 uint32_t num = 0; 62 struct net_device *dev; 63 | 58 uint32_t trash; 59 int x; 60 uint32_t *times; 61 uint32_t num = 0; 62 struct net_device *dev; 63 |
64 | |
65 printk("Devtime Driver Version %s Loaded...\n", DRIVER_VER); 66 | 64 printk("Devtime Driver Version %s Loaded...\n", DRIVER_VER); 65 |
67 if ((dataAddr != 0) && (count != 0)) 68 { | 66 if (dataAddr != 0 && count != 0) { |
69 addr = simple_strtoull(dataAddr, NULL, 0); 70 71 addr = ioremap(addr, PAGE_SIZE); 72 /** 73 * Make sure that the remapping actually worked. On alpha we have 74 * linear addressing, so its not a problem. But it can fail in x86 75 * if physical memory is mapped to this address. 76 */ 77 times = kmalloc(sizeof(uint32_t) * count, GFP_USER); | 67 addr = simple_strtoull(dataAddr, NULL, 0); 68 69 addr = ioremap(addr, PAGE_SIZE); 70 /** 71 * Make sure that the remapping actually worked. On alpha we have 72 * linear addressing, so its not a problem. But it can fail in x86 73 * if physical memory is mapped to this address. 74 */ 75 times = kmalloc(sizeof(uint32_t) * count, GFP_USER); |
78 if (!times) 79 { | 76 if (!times) { |
80 printk("Could not allocate memory... Try again later.\n"); 81 return -1; 82 } 83 | 77 printk("Could not allocate memory... Try again later.\n"); 78 return -1; 79 } 80 |
84 if (addr) 85 { | 81 if (addr) { |
86 printk("Preparing to read %#llx %d times.\n", addr, count); 87 88 t1 = cycleCounter(trash); | 82 printk("Preparing to read %#llx %d times.\n", addr, count); 83 84 t1 = cycleCounter(trash); |
89 for (x=0; x < count; x++) 90 { | 85 for (x = 0; x < count; x++) { |
91 trash = readl(addr); 92 t2 = cycleCounter(trash); 93 times[num++] = t2 - t1; 94 t1 = t2; 95 } 96 97 /** 98 * Unmap the address. 99 */ 100 iounmap(addr); 101 102 printk("Measurements:\n"); | 86 trash = readl(addr); 87 t2 = cycleCounter(trash); 88 times[num++] = t2 - t1; 89 t1 = t2; 90 } 91 92 /** 93 * Unmap the address. 94 */ 95 iounmap(addr); 96 97 printk("Measurements:\n"); |
103 for (x = 0; x < count; x++) 104 { | 98 for (x = 0; x < count; x++) { |
105 printk("%d ", times[x]); | 99 printk("%d ", times[x]); |
106 if (((x+1) % 10) == 0) | 100 if (((x + 1) % 10) == 0) |
107 printk("\n"); 108 } 109 printk("\nDone.\n"); | 101 printk("\n"); 102 } 103 printk("\nDone.\n"); |
110 111 112 } 113 else | 104 } else { |
114 printk("Unable to remap address. Please try again later.\n"); | 105 printk("Unable to remap address. Please try again later.\n"); |
106 } |
|
115 } else { 116 dev = dev_get_by_name("eth0"); | 107 } else { 108 dev = dev_get_by_name("eth0"); |
117 if (dev) 118 { 119 printk("Eth0: MemStart: %#lx MemEnd: %#lx I/O Addr: %#lx\n", dev->mem_start, 120 dev->mem_end, dev->base_addr); | 109 if (dev) { 110 printk("Eth0: MemStart: %#lx MemEnd: %#lx I/O Addr: %#lx\n", 111 dev->mem_start, dev->mem_end, dev->base_addr); |
121 dev_put(dev); 122 } 123 dev = 0; 124 dev = dev_get_by_name("eth1"); | 112 dev_put(dev); 113 } 114 dev = 0; 115 dev = dev_get_by_name("eth1"); |
125 if (dev) 126 { 127 printk("Eth1: MemStart: %#lx MemEnd: %#lx I/O Addr: %#lx\n", dev->mem_start, 128 dev->mem_end, dev->base_addr); | 116 if (dev) { 117 printk("Eth1: MemStart: %#lx MemEnd: %#lx I/O Addr: %#lx\n", 118 dev->mem_start, dev->mem_end, dev->base_addr); |
129 dev_put(dev); 130 } 131 | 119 dev_put(dev); 120 } 121 |
132 | |
133 printk("Required information not supplied.\n"); 134 } 135 136 return 0; 137} 138 139#ifdef __i386__ 140 --- 13 unchanged lines hidden (view full) --- 154 uint32_t res; 155 asm volatile ("rpcc %0, %1" : "=r"(res) : "r" (dep) : "memory"); 156 return res; 157} 158#else 159#error Architecture NOT SUPPORTE 160#endif 161 | 122 printk("Required information not supplied.\n"); 123 } 124 125 return 0; 126} 127 128#ifdef __i386__ 129 --- 13 unchanged lines hidden (view full) --- 143 uint32_t res; 144 asm volatile ("rpcc %0, %1" : "=r"(res) : "r" (dep) : "memory"); 145 return res; 146} 147#else 148#error Architecture NOT SUPPORTE 149#endif 150 |
162static void __exit devtime_end(void) { | 151static void __exit devtime_end(void) 152{ |
163 printk("Devtime Driver Version %s Unloaded...\n", DRIVER_VER); 164} 165 166 167module_init(devtime_start); 168module_exit(devtime_end); 169 170MODULE_LICENSE("Dual BSD/GPL"); 171MODULE_AUTHOR(DRIVER_AUTHOR); 172MODULE_DESCRIPTION(DRIVER_DESC); 173module_param(dataAddr, charp, 0); 174module_param(count, int, 0); | 153 printk("Devtime Driver Version %s Unloaded...\n", DRIVER_VER); 154} 155 156 157module_init(devtime_start); 158module_exit(devtime_end); 159 160MODULE_LICENSE("Dual BSD/GPL"); 161MODULE_AUTHOR(DRIVER_AUTHOR); 162MODULE_DESCRIPTION(DRIVER_DESC); 163module_param(dataAddr, charp, 0); 164module_param(count, int, 0); |