1 /* 2 * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 #include <ras_arch.h> 7 #include <utils_def.h> 8 9 /* 10 * Probe for error in memory-mapped registers containing error records 11 * implemented Standard Error Record format. Upon detecting an error, set probe 12 * data to the index of the record in error, and return 1; otherwise, return 0. 13 */ 14 int ser_probe_memmap(uintptr_t base, unsigned int size_num_k, int *probe_data) 15 { 16 unsigned int num_records, num_group_regs, i; 17 uint64_t gsr; 18 19 assert(base != 0UL); 20 21 /* Only 4K supported for now */ 22 assert(size_num_k == STD_ERR_NODE_SIZE_NUM_K); 23 24 num_records = (unsigned int) 25 (mmio_read_32(ERR_DEVID(base, size_num_k)) & ERR_DEVID_MASK); 26 27 /* A group register shows error status for 2^6 error records */ 28 num_group_regs = (num_records >> 6U) + 1U; 29 30 /* Iterate through group registers to find a record in error */ 31 for (i = 0; i < num_group_regs; i++) { 32 gsr = mmio_read_64(ERR_GSR(base, size_num_k, i)); 33 if (gsr == 0ULL) 34 continue; 35 36 /* Return the index of the record in error */ 37 if (probe_data != NULL) 38 *probe_data = (((int) (i << 6U)) + __builtin_ctzll(gsr)); 39 40 return 1; 41 } 42 43 return 0; 44 } 45 46 /* 47 * Probe for error in System Registers where error records are implemented in 48 * Standard Error Record format. Upon detecting an error, set probe data to the 49 * index of the record in error, and return 1; otherwise, return 0. 50 */ 51 int ser_probe_sysreg(unsigned int idx_start, unsigned int num_idx, int *probe_data) 52 { 53 unsigned int i; 54 uint64_t status; 55 unsigned int max_idx __unused = 56 ((unsigned int) read_erridr_el1()) & ERRIDR_MASK; 57 58 assert(idx_start < max_idx); 59 assert(check_u32_overflow(idx_start, num_idx)); 60 assert((idx_start + num_idx - 1U) < max_idx); 61 62 for (i = 0; i < num_idx; i++) { 63 /* Select the error record */ 64 ser_sys_select_record(idx_start + i); 65 66 /* Retrieve status register from the error record */ 67 status = read_erxstatus_el1(); 68 69 /* Check for valid field in status */ 70 if (ERR_STATUS_GET_FIELD(status, V) != 0U) { 71 if (probe_data != NULL) 72 *probe_data = (int) i; 73 return 1; 74 } 75 } 76 77 return 0; 78 } 79