1 /* 2 * Copyright 2005-2006, Haiku, Inc. 3 * Distributed under the terms of the MIT License. 4 * 5 * Authors: 6 * Axel Dörfler, axeld@pinc-software.de 7 */ 8 9 10 #include "amd.h" 11 #include "generic_x86.h" 12 13 #include <OS.h> 14 15 16 static void 17 amd_init_mtrrs(void) 18 { 19 generic_init_mtrrs(generic_count_mtrrs()); 20 } 21 22 23 static status_t 24 amd_init(void) 25 { 26 system_info info; 27 if (get_system_info(&info) != B_OK) 28 return B_ERROR; 29 30 if ((info.cpu_type & B_CPU_x86_VENDOR_MASK) != B_CPU_AMD_x86) 31 return B_ERROR; 32 33 // The K6-2 doesn't seem to support write-combining (before model 9), 34 // so we ignore anything before that one. 35 if (info.cpu_type <= B_CPU_AMD_K6_2) 36 return B_ERROR; 37 38 generic_mtrr_compute_physical_mask(); 39 generic_dump_mtrrs(generic_count_mtrrs()); 40 41 return B_OK; 42 } 43 44 45 static status_t 46 amd_stdops(int32 op, ...) 47 { 48 switch (op) { 49 case B_MODULE_INIT: 50 return amd_init(); 51 case B_MODULE_UNINIT: 52 return B_OK; 53 } 54 55 return B_ERROR; 56 } 57 58 59 x86_cpu_module_info gAMDModule = { 60 { 61 "cpu/generic_x86/amd/v1", 62 0, 63 amd_stdops, 64 }, 65 66 generic_count_mtrrs, 67 amd_init_mtrrs, 68 69 generic_set_mtrr, 70 generic_get_mtrr, 71 }; 72