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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef _BERT_STORAGE_H_
#define _BERT_STORAGE_H_
#include <stdint.h>
#include <acpi/acpi.h>
/* Items in the BERT region
*
* * Each item begins with a Generic Error Status Block
* * Zero or more Generic Error Data Entries follow, and
* are associated with the Status Block
* * Each Generic Error Data Entry must be a certain type,
* as defined in the UEFI CPER appendix
* * Each type may allow zero or more additional sets of
* data, e.g. error descriptions, or processor contexts.
*
* In the example layout below, there are three BERT region
* entries. The first two are a single error. The third
* has two errors, with one providing a variable amount
* of additional information.
*
* +====================================================================+
* | Generic Error | Generic Error | Platform Memory Error |
* | Status | Data Entry | |
* |====================================================================|
* | Generic Error | Generic Error | Generic Processor Error |
* | Status | Data Entry | |
* |====================================================================|
* | Generic Error | Generic Error | IA32/X64 Processor Error |
* | Status | Data Entry | +----------------------------+
* | | | | Error Check Data |
* | | | +----------------------------+
* | | | | MSR Context |
* | | | +----------------------------+
* | | | | X64 Registers Context |
* | +-----------------+----+----------------------------+
* | | Generic Error | PCI Express Error |
* | | Data Entry | |
* +--------------------------------------------------------------------+
*/
/* Get implementation-specific reserved area for generating BERT info */
void bert_reserved_region(void **start, size_t *size);
/* Get the region where BERT error structures have been constructed for
* generating the ACPI table
*/
void bert_errors_region(void **start, size_t *size);
/* Get amount of available storage left for error info */
size_t bert_storage_remaining(void);
/* Find if errors were added, a BERT region is present, and ACPI table needed */
int bert_errors_present(void);
/* Get the number of entries associated with status */
static inline size_t bert_entry_count(acpi_generic_error_status_t *status)
{
return (status->block_status & GENERIC_ERR_STS_ENTRY_COUNT_MASK)
>> GENERIC_ERR_STS_ENTRY_COUNT_SHIFT;
}
/* Increment the number of entries this status describes */
static inline void bert_bump_entry_count(acpi_generic_error_status_t *status)
{
int count;
count = bert_entry_count(status) + 1;
status->block_status &= ~GENERIC_ERR_STS_ENTRY_COUNT_MASK;
status->block_status |= count << GENERIC_ERR_STS_ENTRY_COUNT_SHIFT;
}
/* Find the address of the first Generic Data structure from its status entry */
static inline acpi_hest_generic_data_v300_t *acpi_hest_generic_data3(
acpi_generic_error_status_t *status)
{
return (acpi_hest_generic_data_v300_t *)
((u8 *)status + sizeof(*status));
}
/* Find the address of a Generic Data structure's CPER error record section */
#define section_of_acpientry(A, B) ((typeof(A))((u8 *)(B) + sizeof(*(B))))
/* Add a context to an existing IA32/X64-type error entry */
cper_ia32x64_context_t *new_cper_ia32x64_ctx(
acpi_generic_error_status_t *status,
cper_ia32x64_proc_error_section_t *x86err, int type, int num);
/* Helper to add an MSR context to an existing IA32/X64-type error entry */
cper_ia32x64_context_t *cper_new_ia32x64_context_msr(
acpi_generic_error_status_t *status,
cper_ia32x64_proc_error_section_t *x86err, u32 addr, int num);
/* Add check info to an existing IA32/X64-type error entry */
cper_ia32x64_proc_error_info_t *new_cper_ia32x64_check(
acpi_generic_error_status_t *status,
cper_ia32x64_proc_error_section_t *x86err,
enum cper_x86_check_type type);
/* Append a new ACPI Generic Error Data Entry plus CPER Error Section to an
* existing ACPI Generic Error Status Block. The caller is responsible for
* the setting the status and entry severity, as well as populating all fields
* of the error section.
*/
acpi_hest_generic_data_v300_t *bert_append_error_datasection(
acpi_generic_error_status_t *status, guid_t *guid);
/* Helper to append an ACPI Generic Error Data Entry plus a CPER Processor
* Generic Error Section. As many fields are populated as possible for the
* caller.
*/
acpi_hest_generic_data_v300_t *bert_append_genproc(
acpi_generic_error_status_t *status);
/* Helper to append an ACPI Generic Error Data Entry plus a CPER IA32/X64
* Processor Error Section. As many fields are populated as possible for the
* caller.
*/
acpi_hest_generic_data_v300_t *bert_append_ia32x64(
acpi_generic_error_status_t *status);
/* Add a new event to the BERT region. An event consists of an ACPI Error
* Status Block, a Generic Error Data Entry, and an associated CPER Error
* Section.
*/
acpi_generic_error_status_t *bert_new_event(guid_t *guid);
#endif /* _BERT_STORAGE_H_ */
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