Jeenu Viswambharan | 19f6cf2 | 2017-12-07 08:43:05 +0000 | [diff] [blame] | 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 | int num_records, num_group_regs, i; |
| 17 | uint64_t gsr; |
| 18 | |
| 19 | assert(base != 0); |
| 20 | |
| 21 | /* Only 4K supported for now */ |
| 22 | assert(size_num_k == STD_ERR_NODE_SIZE_NUM_K); |
| 23 | |
| 24 | num_records = (mmio_read_32(ERR_DEVID(base, size_num_k)) & ERR_DEVID_MASK); |
| 25 | |
| 26 | /* A group register shows error status for 2^6 error records */ |
| 27 | num_group_regs = (num_records >> 6) + 1; |
| 28 | |
| 29 | /* Iterate through group registers to find a record in error */ |
| 30 | for (i = 0; i < num_group_regs; i++) { |
| 31 | gsr = mmio_read_64(ERR_GSR(base, size_num_k, i)); |
| 32 | if (gsr == 0) |
| 33 | continue; |
| 34 | |
| 35 | /* Return the index of the record in error */ |
| 36 | if (probe_data != NULL) |
| 37 | *probe_data = ((i << 6) + __builtin_ctz(gsr)); |
| 38 | |
| 39 | return 1; |
| 40 | } |
| 41 | |
| 42 | return 0; |
| 43 | } |
| 44 | |
| 45 | /* |
| 46 | * Probe for error in System Registers where error records are implemented in |
| 47 | * Standard Error Record format. Upon detecting an error, set probe data to the |
| 48 | * index of the record in error, and return 1; otherwise, return 0. |
| 49 | */ |
| 50 | int ser_probe_sysreg(unsigned int idx_start, unsigned int num_idx, int *probe_data) |
| 51 | { |
| 52 | int i; |
| 53 | uint64_t status; |
| 54 | unsigned int max_idx __unused = read_erridr_el1() & ERRIDR_MASK; |
| 55 | |
| 56 | assert(idx_start < max_idx); |
| 57 | assert(check_u32_overflow(idx_start, num_idx) == 0); |
| 58 | assert((idx_start + num_idx - 1) < max_idx); |
| 59 | |
| 60 | for (i = 0; i < num_idx; i++) { |
| 61 | /* Select the error record */ |
| 62 | ser_sys_select_record(idx_start + i); |
| 63 | |
| 64 | /* Retrieve status register from the error record */ |
| 65 | status = read_erxstatus_el1(); |
| 66 | |
| 67 | /* Check for valid field in status */ |
| 68 | if (ERR_STATUS_GET_FIELD(status, V)) { |
| 69 | if (probe_data != NULL) |
| 70 | *probe_data = i; |
| 71 | return 1; |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | return 0; |
| 76 | } |