1de9707f9SLawrence Tang /** 2efe17e2cSLawrence Tang * Functions for generating pseudo-random CPER DMAr error sections. 3de9707f9SLawrence Tang * 4de9707f9SLawrence Tang * Author: Lawrence.Tang@arm.com 5de9707f9SLawrence Tang **/ 6de9707f9SLawrence Tang 7de9707f9SLawrence Tang #include <stdlib.h> 8de9707f9SLawrence Tang #include "../../edk/BaseTypes.h" 9de9707f9SLawrence Tang #include "../gen-utils.h" 108f977457SLawrence Tang #include "gen-section.h" 11de9707f9SLawrence Tang 12efe17e2cSLawrence Tang //Generates a single pseudo-random generic DMAr error section, saving the resulting address to the given 13de9707f9SLawrence Tang //location. Returns the size of the newly created section. 14de9707f9SLawrence Tang size_t generate_section_dmar_generic(void **location) 15de9707f9SLawrence Tang { 16de9707f9SLawrence Tang //Create random bytes. 17de9707f9SLawrence Tang int size = 32; 18de9707f9SLawrence Tang UINT8 *bytes = generate_random_bytes(size); 19de9707f9SLawrence Tang 20de9707f9SLawrence Tang //Set reserved areas to zero. 21de9707f9SLawrence Tang UINT64 *reserved = (UINT64 *)(bytes + 16); 22de9707f9SLawrence Tang *reserved = 0; 23de9707f9SLawrence Tang *(reserved + 1) = 0; 24de9707f9SLawrence Tang 25de9707f9SLawrence Tang //Set expected values. 26de9707f9SLawrence Tang *(bytes + 4) = rand() % 0xC; //Fault reason. 27de9707f9SLawrence Tang *(bytes + 5) = rand() % 2; //Access type. 28de9707f9SLawrence Tang *(bytes + 6) = rand() % 2; //Address type. 29de9707f9SLawrence Tang *(bytes + 7) = rand() % 2 + 1; //Architecture type. 30de9707f9SLawrence Tang 31de9707f9SLawrence Tang //Set return values, exit. 32de9707f9SLawrence Tang *location = bytes; 33de9707f9SLawrence Tang return size; 34de9707f9SLawrence Tang } 35de9707f9SLawrence Tang 36efe17e2cSLawrence Tang //Generates a single pseudo-random VT-d DMAr error section, saving the resulting address to the given 37de9707f9SLawrence Tang //location. Returns the size of the newly created section. 38de9707f9SLawrence Tang size_t generate_section_dmar_vtd(void **location) 39de9707f9SLawrence Tang { 40de9707f9SLawrence Tang //Create random bytes. 41de9707f9SLawrence Tang int size = 144; 42de9707f9SLawrence Tang UINT8 *bytes = generate_random_bytes(size); 43de9707f9SLawrence Tang 44de9707f9SLawrence Tang //Set reserved areas to zero. 45*f8fc7052SJohn Chung for (int i = 0; i < 12; i++) { 46de9707f9SLawrence Tang *(bytes + 36 + i) = 0; //Reserved bytes 36-47. 47*f8fc7052SJohn Chung } 480a4b3f2dSLawrence Tang UINT8 *fault_record = bytes + 48; 490a4b3f2dSLawrence Tang UINT32 *reserved = (UINT32 *)(fault_record); 500a4b3f2dSLawrence Tang *reserved &= ~0xFFF; //First 12 bits of fault record. 51*f8fc7052SJohn Chung reserved = (UINT32 *)(fault_record + 8); 52*f8fc7052SJohn Chung *reserved &= ~0x1FFF0000; //Bits 80-92 of fault record. 530a4b3f2dSLawrence Tang *(fault_record + 15) &= 0x7; //Very last bit of fault record. 54de9707f9SLawrence Tang 55de9707f9SLawrence Tang //Set return values, exit. 56de9707f9SLawrence Tang *location = bytes; 57de9707f9SLawrence Tang return size; 58de9707f9SLawrence Tang } 59de9707f9SLawrence Tang 60efe17e2cSLawrence Tang //Generates a single pseudo-random IOMMU DMAr error section, saving the resulting address to the given 61de9707f9SLawrence Tang //location. Returns the size of the newly created section. 62de9707f9SLawrence Tang size_t generate_section_dmar_iommu(void **location) 63de9707f9SLawrence Tang { 64de9707f9SLawrence Tang //Create random bytes. 65de9707f9SLawrence Tang int size = 144; 66de9707f9SLawrence Tang UINT8 *bytes = generate_random_bytes(size); 67de9707f9SLawrence Tang 68de9707f9SLawrence Tang //Set reserved areas to zero. 69*f8fc7052SJohn Chung for (int i = 0; i < 7; i++) { 700a4b3f2dSLawrence Tang *(bytes + 1 + i) = 0; //Reserved bytes 1 to 7. 71*f8fc7052SJohn Chung } 72de9707f9SLawrence Tang UINT64 *reserved = (UINT64 *)(bytes + 24); 73de9707f9SLawrence Tang *reserved = 0; //Reserved bytes 24-31. 74*f8fc7052SJohn Chung for (int i = 0; i < 16; i++) { 75de9707f9SLawrence Tang *(bytes + 48 + i) = 0; //Reserved bytes 48-63. 76*f8fc7052SJohn Chung } 77de9707f9SLawrence Tang 78de9707f9SLawrence Tang //Set return values, exit. 79de9707f9SLawrence Tang *location = bytes; 80de9707f9SLawrence Tang return size; 81de9707f9SLawrence Tang } 82