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/*
* Copyright (c) 2018, Arm Limited and Contributors. All rights reserved.
* Copyright (c) 2020, NVIDIA Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef RAS_H
#define RAS_H
#define ERR_HANDLER_VERSION 1U
/* Error record access mechanism */
#define ERR_ACCESS_SYSREG 0
#define ERR_ACCESS_MEMMAP 1
/*
* Register all error records on the platform.
*
* This macro must be used in the same file as the array of error record info
* are declared. Only then would ARRAY_SIZE() yield a meaningful value.
*/
#define REGISTER_ERR_RECORD_INFO(_records) \
const struct err_record_mapping err_record_mappings = { \
.err_records = (_records), \
.num_err_records = ARRAY_SIZE(_records), \
}
/* Error record info iterator */
#define for_each_err_record_info(_i, _info) \
for ((_i) = 0, (_info) = err_record_mappings.err_records; \
(_i) < err_record_mappings.num_err_records; \
(_i)++, (_info)++)
#define ERR_RECORD_COMMON_(_probe, _handler, _aux) \
.probe = _probe, \
.handler = _handler, \
.aux_data = _aux,
#define ERR_RECORD_SYSREG_V1(_idx_start, _num_idx, _probe, _handler, _aux) \
{ \
.version = 1, \
.sysreg.idx_start = _idx_start, \
.sysreg.num_idx = _num_idx, \
.access = ERR_ACCESS_SYSREG, \
ERR_RECORD_COMMON_(_probe, _handler, _aux) \
}
#define ERR_RECORD_MEMMAP_V1(_base_addr, _size_num_k, _probe, _handler, _aux) \
{ \
.version = 1, \
.memmap.base_addr = _base_addr, \
.memmap.size_num_k = _size_num_k, \
.access = ERR_ACCESS_MEMMAP, \
ERR_RECORD_COMMON_(_probe, _handler, _aux) \
}
/*
* Macro to be used to name and declare an array of RAS interrupts along with
* their handlers.
*
* This macro must be used in the same file as the array of interrupts are
* declared. Only then would ARRAY_SIZE() yield a meaningful value. Also, the
* array is expected to be sorted in the increasing order of interrupt number.
*/
#define REGISTER_RAS_INTERRUPTS(_array) \
const struct ras_interrupt_mapping ras_interrupt_mappings = { \
.intrs = (_array), \
.num_intrs = ARRAY_SIZE(_array), \
}
#ifndef __ASSEMBLER__
#include <assert.h>
#include <lib/extensions/ras_arch.h>
struct err_record_info;
struct ras_interrupt {
/* Interrupt number, and the associated error record info */
unsigned int intr_number;
struct err_record_info *err_record;
void *cookie;
};
/* Function to probe a error record group for error */
typedef int (*err_record_probe_t)(const struct err_record_info *info,
int *probe_data);
/* Data passed to error record group handler */
struct err_handler_data {
/* Info passed on from top-level exception handler */
uint64_t flags;
void *cookie;
void *handle;
/* Data structure version */
unsigned int version;
/* Reason for EA: one the ERROR_* constants */
unsigned int ea_reason;
/*
* For EAs received at vector, the value read from ESR; for an EA
* synchronized by ESB, the value of DISR.
*/
uint32_t syndrome;
/* For errors signalled via interrupt, the raw interrupt ID; otherwise, 0. */
unsigned int interrupt;
};
/* Function to handle error from an error record group */
typedef int (*err_record_handler_t)(const struct err_record_info *info,
int probe_data, const struct err_handler_data *const data);
/* Error record information */
struct err_record_info {
/* Function to probe error record group for errors */
err_record_probe_t probe;
/* Function to handle error record group errors */
err_record_handler_t handler;
/* Opaque group-specific data */
void *aux_data;
/* Additional information for Standard Error Records */
union {
struct {
/*
* For a group accessed via memory-mapped register,
* base address of the page hosting error records, and
* the size of the record group.
*/
uintptr_t base_addr;
/* Size of group in number of KBs */
unsigned int size_num_k;
} memmap;
struct {
/*
* For error records accessed via system register, index of
* the error record.
*/
unsigned int idx_start;
unsigned int num_idx;
} sysreg;
};
/* Data structure version */
unsigned int version;
/* Error record access mechanism */
unsigned int access:1;
};
struct err_record_mapping {
struct err_record_info *err_records;
size_t num_err_records;
};
struct ras_interrupt_mapping {
struct ras_interrupt *intrs;
size_t num_intrs;
};
extern const struct err_record_mapping err_record_mappings;
extern const struct ras_interrupt_mapping ras_interrupt_mappings;
/*
* Helper functions to probe memory-mapped and system registers implemented in
* Standard Error Record format
*/
static inline int ras_err_ser_probe_memmap(const struct err_record_info *info,
int *probe_data)
{
assert(info->version == ERR_HANDLER_VERSION);
return ser_probe_memmap(info->memmap.base_addr, info->memmap.size_num_k,
probe_data);
}
static inline int ras_err_ser_probe_sysreg(const struct err_record_info *info,
int *probe_data)
{
assert(info->version == ERR_HANDLER_VERSION);
return ser_probe_sysreg(info->sysreg.idx_start, info->sysreg.num_idx,
probe_data);
}
const char *ras_serr_to_str(unsigned int serr);
int ras_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie,
void *handle, uint64_t flags);
void ras_init(void);
#endif /* __ASSEMBLER__ */
#endif /* RAS_H */
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