1*de9707f9SLawrence Tang /** 2*de9707f9SLawrence Tang * Functions for generating psuedo-random CPER DMAr error sections. 3*de9707f9SLawrence Tang * 4*de9707f9SLawrence Tang * Author: Lawrence.Tang@arm.com 5*de9707f9SLawrence Tang **/ 6*de9707f9SLawrence Tang 7*de9707f9SLawrence Tang #include <stdlib.h> 8*de9707f9SLawrence Tang #include "../../edk/BaseTypes.h" 9*de9707f9SLawrence Tang #include "../gen-utils.h" 10*de9707f9SLawrence Tang #include "gen-sections.h" 11*de9707f9SLawrence Tang 12*de9707f9SLawrence Tang //Generates a single psuedo-random generic DMAr error section, saving the resulting address to the given 13*de9707f9SLawrence Tang //location. Returns the size of the newly created section. 14*de9707f9SLawrence Tang size_t generate_section_dmar_generic(void** location) 15*de9707f9SLawrence Tang { 16*de9707f9SLawrence Tang //Create random bytes. 17*de9707f9SLawrence Tang int size = 32; 18*de9707f9SLawrence Tang UINT8* bytes = generate_random_bytes(size); 19*de9707f9SLawrence Tang 20*de9707f9SLawrence Tang //Set reserved areas to zero. 21*de9707f9SLawrence Tang UINT64* reserved = (UINT64*)(bytes + 16); 22*de9707f9SLawrence Tang *reserved = 0; 23*de9707f9SLawrence Tang *(reserved + 1) = 0; 24*de9707f9SLawrence Tang 25*de9707f9SLawrence Tang //Set expected values. 26*de9707f9SLawrence Tang *(bytes + 4) = rand() % 0xC; //Fault reason. 27*de9707f9SLawrence Tang *(bytes + 5) = rand() % 2; //Access type. 28*de9707f9SLawrence Tang *(bytes + 6) = rand() % 2; //Address type. 29*de9707f9SLawrence Tang *(bytes + 7) = rand() % 2 + 1; //Architecture type. 30*de9707f9SLawrence Tang 31*de9707f9SLawrence Tang //Set return values, exit. 32*de9707f9SLawrence Tang *location = bytes; 33*de9707f9SLawrence Tang return size; 34*de9707f9SLawrence Tang } 35*de9707f9SLawrence Tang 36*de9707f9SLawrence Tang //Generates a single psuedo-random VT-d DMAr error section, saving the resulting address to the given 37*de9707f9SLawrence Tang //location. Returns the size of the newly created section. 38*de9707f9SLawrence Tang size_t generate_section_dmar_vtd(void** location) 39*de9707f9SLawrence Tang { 40*de9707f9SLawrence Tang //Create random bytes. 41*de9707f9SLawrence Tang int size = 144; 42*de9707f9SLawrence Tang UINT8* bytes = generate_random_bytes(size); 43*de9707f9SLawrence Tang 44*de9707f9SLawrence Tang //Set reserved areas to zero. 45*de9707f9SLawrence Tang for (int i=0; i<12; i++) 46*de9707f9SLawrence Tang *(bytes + 36 + i) = 0; //Reserved bytes 36-47. 47*de9707f9SLawrence Tang 48*de9707f9SLawrence Tang //Set return values, exit. 49*de9707f9SLawrence Tang *location = bytes; 50*de9707f9SLawrence Tang return size; 51*de9707f9SLawrence Tang } 52*de9707f9SLawrence Tang 53*de9707f9SLawrence Tang //Generates a single psuedo-random IOMMU DMAr error section, saving the resulting address to the given 54*de9707f9SLawrence Tang //location. Returns the size of the newly created section. 55*de9707f9SLawrence Tang size_t generate_section_dmar_iommu(void** location) 56*de9707f9SLawrence Tang { 57*de9707f9SLawrence Tang //Create random bytes. 58*de9707f9SLawrence Tang int size = 144; 59*de9707f9SLawrence Tang UINT8* bytes = generate_random_bytes(size); 60*de9707f9SLawrence Tang 61*de9707f9SLawrence Tang //Set reserved areas to zero. 62*de9707f9SLawrence Tang for (int i=0; i<7; i++) 63*de9707f9SLawrence Tang *(bytes + 1 + i) + 0; //Reserved bytes 1 to 7. 64*de9707f9SLawrence Tang UINT64* reserved = (UINT64*)(bytes + 24); 65*de9707f9SLawrence Tang *reserved = 0; //Reserved bytes 24-31. 66*de9707f9SLawrence Tang for (int i=0; i<16; i++) 67*de9707f9SLawrence Tang *(bytes + 48 + i) = 0; //Reserved bytes 48-63. 68*de9707f9SLawrence Tang 69*de9707f9SLawrence Tang //Set return values, exit. 70*de9707f9SLawrence Tang *location = bytes; 71*de9707f9SLawrence Tang return size; 72*de9707f9SLawrence Tang }