102c801a5SLawrence Tang /** 2efe17e2cSLawrence Tang * Functions for generating pseudo-random CPER generic processor sections. 302c801a5SLawrence Tang * 402c801a5SLawrence Tang * Author: Lawrence.Tang@arm.com 502c801a5SLawrence Tang **/ 602c801a5SLawrence Tang 702c801a5SLawrence Tang #include <stdlib.h> 802c801a5SLawrence Tang #include "../../edk/BaseTypes.h" 902c801a5SLawrence Tang #include "../gen-utils.h" 108f977457SLawrence Tang #include "gen-section.h" 1102c801a5SLawrence Tang 12efe17e2cSLawrence Tang //Generates a single pseudo-random generic processor section, saving the resulting address to the given 1302c801a5SLawrence Tang //location. Returns the size of the newly created section. 1402c801a5SLawrence Tang size_t generate_section_generic(void **location) 1502c801a5SLawrence Tang { 1602c801a5SLawrence Tang //Create random bytes. 1702c801a5SLawrence Tang size_t size = generate_random_section(location, 192); 1802c801a5SLawrence Tang 1902c801a5SLawrence Tang //Set reserved locations to zero. 2002c801a5SLawrence Tang UINT8 *start_byte = (UINT8 *)*location; 2102c801a5SLawrence Tang *((UINT64 *)start_byte) &= 0xFFF; 22*f8fc7052SJohn Chung *(start_byte + 12) &= 0x7; 2302c801a5SLawrence Tang *((UINT16 *)(start_byte + 14)) = 0x0; 2402c801a5SLawrence Tang 25aacf0e26SLawrence Tang //Ensure CPU brand string does not terminate early. 26*f8fc7052SJohn Chung for (int i = 0; i < 128; i++) { 27aacf0e26SLawrence Tang UINT8 *byte = start_byte + 24 + i; 28*f8fc7052SJohn Chung if (*byte == 0x0) { 29aacf0e26SLawrence Tang *byte = rand() % 127 + 1; 30*f8fc7052SJohn Chung } 31aacf0e26SLawrence Tang 32aacf0e26SLawrence Tang //Null terminate last byte. 33*f8fc7052SJohn Chung if (i == 127) { 34aacf0e26SLawrence Tang *byte = 0x0; 35aacf0e26SLawrence Tang } 36*f8fc7052SJohn Chung } 37aacf0e26SLawrence Tang 3802c801a5SLawrence Tang return size; 3902c801a5SLawrence Tang } 40