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; |
58 uint32_t trash; 59 int x; 60 uint32_t *times; 61 uint32_t num = 0; 62 struct net_device *dev; 63 |
64 printk("Devtime Driver Version %s Loaded...\n", DRIVER_VER); 65 |
66 if (dataAddr != 0 && count != 0) { |
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); |
76 if (!times) { |
77 printk("Could not allocate memory... Try again later.\n"); 78 return -1; 79 } 80 |
81 if (addr) { |
82 printk("Preparing to read %#llx %d times.\n", addr, count); 83 84 t1 = cycleCounter(trash); |
85 for (x = 0; x < count; x++) { |
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"); |
98 for (x = 0; x < count; x++) { |
99 printk("%d ", times[x]); |
100 if (((x + 1) % 10) == 0) |
101 printk("\n"); 102 } 103 printk("\nDone.\n"); |
104 } else { |
105 printk("Unable to remap address. Please try again later.\n"); |
106 } |
107 } else { 108 dev = dev_get_by_name("eth0"); |
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); |
112 dev_put(dev); 113 } 114 dev = 0; 115 dev = dev_get_by_name("eth1"); |
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); |
119 dev_put(dev); 120 } 121 |
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 |
151static void __exit devtime_end(void) 152{ |
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); |