mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-26 20:09:02 +09:00
536 lines
12 KiB
C
536 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2011, Google Inc. All rights reserved.
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*/
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/*
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* This module records the progress of boot and arbitrary commands, and
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* permits accurate timestamping of each.
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*/
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#include <common.h>
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#include <bootstage.h>
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#include <hang.h>
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#include <log.h>
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#include <malloc.h>
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#include <sort.h>
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#include <spl.h>
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#include <linux/compiler.h>
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#include <linux/libfdt.h>
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DECLARE_GLOBAL_DATA_PTR;
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enum {
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RECORD_COUNT = CONFIG_VAL(BOOTSTAGE_RECORD_COUNT),
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};
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struct bootstage_record {
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ulong time_us;
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uint32_t start_us;
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const char *name;
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int flags; /* see enum bootstage_flags */
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enum bootstage_id id;
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};
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struct bootstage_data {
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uint rec_count;
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uint next_id;
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struct bootstage_record record[RECORD_COUNT];
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};
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enum {
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BOOTSTAGE_VERSION = 0,
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BOOTSTAGE_MAGIC = 0xb00757a3,
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BOOTSTAGE_DIGITS = 9,
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};
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struct bootstage_hdr {
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u32 version; /* BOOTSTAGE_VERSION */
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u32 count; /* Number of records */
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u32 size; /* Total data size (non-zero if valid) */
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u32 magic; /* Magic number */
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u32 next_id; /* Next ID to use for bootstage */
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};
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int bootstage_relocate(void)
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{
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struct bootstage_data *data = gd->bootstage;
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int i;
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char *ptr;
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/* Figure out where to relocate the strings to */
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ptr = (char *)(data + 1);
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/*
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* Duplicate all strings. They may point to an old location in the
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* program .text section that can eventually get trashed.
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*/
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debug("Relocating %d records\n", data->rec_count);
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for (i = 0; i < data->rec_count; i++) {
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const char *from = data->record[i].name;
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strcpy(ptr, from);
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data->record[i].name = ptr;
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ptr += strlen(ptr) + 1;
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}
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return 0;
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}
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struct bootstage_record *find_id(struct bootstage_data *data,
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enum bootstage_id id)
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{
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struct bootstage_record *rec;
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struct bootstage_record *end;
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for (rec = data->record, end = rec + data->rec_count; rec < end;
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rec++) {
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if (rec->id == id)
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return rec;
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}
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return NULL;
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}
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struct bootstage_record *ensure_id(struct bootstage_data *data,
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enum bootstage_id id)
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{
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struct bootstage_record *rec;
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rec = find_id(data, id);
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if (!rec && data->rec_count < RECORD_COUNT) {
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rec = &data->record[data->rec_count++];
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rec->id = id;
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return rec;
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}
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return rec;
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}
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ulong bootstage_add_record(enum bootstage_id id, const char *name,
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int flags, ulong mark)
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{
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struct bootstage_data *data = gd->bootstage;
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struct bootstage_record *rec;
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/*
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* initf_bootstage() is called very early during boot but since hang()
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* calls bootstage_error() we can be called before bootstage is set up.
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* Add a check to avoid this.
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*/
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if (!data)
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return mark;
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if (flags & BOOTSTAGEF_ALLOC)
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id = data->next_id++;
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/* Only record the first event for each */
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rec = find_id(data, id);
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if (!rec && data->rec_count < RECORD_COUNT) {
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rec = &data->record[data->rec_count++];
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rec->time_us = mark;
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rec->name = name;
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rec->flags = flags;
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rec->id = id;
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}
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/* Tell the board about this progress */
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show_boot_progress(flags & BOOTSTAGEF_ERROR ? -id : id);
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return mark;
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}
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ulong bootstage_mark(enum bootstage_id id)
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{
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return bootstage_add_record(id, NULL, 0, timer_get_boot_us());
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}
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ulong bootstage_error(enum bootstage_id id)
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{
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return bootstage_add_record(id, NULL, BOOTSTAGEF_ERROR,
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timer_get_boot_us());
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}
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ulong bootstage_mark_name(enum bootstage_id id, const char *name)
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{
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int flags = 0;
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if (id == BOOTSTAGE_ID_ALLOC)
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flags = BOOTSTAGEF_ALLOC;
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return bootstage_add_record(id, name, flags, timer_get_boot_us());
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}
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ulong bootstage_mark_code(const char *file, const char *func, int linenum)
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{
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char *str, *p;
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__maybe_unused char *end;
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int len = 0;
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/* First work out the length we need to allocate */
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if (linenum != -1)
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len = 11;
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if (func)
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len += strlen(func);
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if (file)
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len += strlen(file);
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str = malloc(len + 1);
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p = str;
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end = p + len;
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if (file)
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p += snprintf(p, end - p, "%s,", file);
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if (linenum != -1)
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p += snprintf(p, end - p, "%d", linenum);
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if (func)
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p += snprintf(p, end - p, ": %s", func);
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return bootstage_mark_name(BOOTSTAGE_ID_ALLOC, str);
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}
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uint32_t bootstage_start(enum bootstage_id id, const char *name)
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{
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struct bootstage_data *data = gd->bootstage;
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struct bootstage_record *rec = ensure_id(data, id);
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ulong start_us = timer_get_boot_us();
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if (rec) {
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rec->start_us = start_us;
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rec->name = name;
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}
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return start_us;
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}
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uint32_t bootstage_accum(enum bootstage_id id)
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{
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struct bootstage_data *data = gd->bootstage;
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struct bootstage_record *rec = ensure_id(data, id);
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uint32_t duration;
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if (!rec)
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return 0;
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duration = (uint32_t)timer_get_boot_us() - rec->start_us;
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rec->time_us += duration;
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return duration;
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}
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/**
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* Get a record name as a printable string
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*
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* @param buf Buffer to put name if needed
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* @param len Length of buffer
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* @param rec Boot stage record to get the name from
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* @return pointer to name, either from the record or pointing to buf.
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*/
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static const char *get_record_name(char *buf, int len,
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const struct bootstage_record *rec)
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{
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if (rec->name)
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return rec->name;
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else if (rec->id >= BOOTSTAGE_ID_USER)
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snprintf(buf, len, "user_%d", rec->id - BOOTSTAGE_ID_USER);
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else
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snprintf(buf, len, "id=%d", rec->id);
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return buf;
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}
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static uint32_t print_time_record(struct bootstage_record *rec, uint32_t prev)
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{
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char buf[20];
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if (prev == -1U) {
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printf("%11s", "");
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print_grouped_ull(rec->time_us, BOOTSTAGE_DIGITS);
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} else {
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print_grouped_ull(rec->time_us, BOOTSTAGE_DIGITS);
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print_grouped_ull(rec->time_us - prev, BOOTSTAGE_DIGITS);
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}
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printf(" %s\n", get_record_name(buf, sizeof(buf), rec));
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return rec->time_us;
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}
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static int h_compare_record(const void *r1, const void *r2)
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{
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const struct bootstage_record *rec1 = r1, *rec2 = r2;
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return rec1->time_us > rec2->time_us ? 1 : -1;
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}
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#ifdef CONFIG_OF_LIBFDT
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/**
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* Add all bootstage timings to a device tree.
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*
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* @param blob Device tree blob
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* @return 0 on success, != 0 on failure.
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*/
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static int add_bootstages_devicetree(struct fdt_header *blob)
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{
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struct bootstage_data *data = gd->bootstage;
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int bootstage;
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char buf[20];
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int recnum;
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int i;
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if (!blob)
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return 0;
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/*
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* Create the node for bootstage.
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* The address of flat device tree is set up by the command bootm.
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*/
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bootstage = fdt_add_subnode(blob, 0, "bootstage");
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if (bootstage < 0)
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return -EINVAL;
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/*
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* Insert the timings to the device tree in the reverse order so
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* that they can be printed in the Linux kernel in the right order.
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*/
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for (recnum = data->rec_count - 1, i = 0; recnum >= 0; recnum--, i++) {
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struct bootstage_record *rec = &data->record[recnum];
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int node;
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if (rec->id != BOOTSTAGE_ID_AWAKE && rec->time_us == 0)
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continue;
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node = fdt_add_subnode(blob, bootstage, simple_itoa(i));
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if (node < 0)
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break;
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/* add properties to the node. */
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if (fdt_setprop_string(blob, node, "name",
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get_record_name(buf, sizeof(buf), rec)))
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return -EINVAL;
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/* Check if this is a 'mark' or 'accum' record */
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if (fdt_setprop_cell(blob, node,
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rec->start_us ? "accum" : "mark",
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rec->time_us))
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return -EINVAL;
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}
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return 0;
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}
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int bootstage_fdt_add_report(void)
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{
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if (add_bootstages_devicetree(working_fdt))
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puts("bootstage: Failed to add to device tree\n");
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return 0;
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}
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#endif
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void bootstage_report(void)
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{
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struct bootstage_data *data = gd->bootstage;
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struct bootstage_record *rec = data->record;
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uint32_t prev;
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int i;
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printf("Timer summary in microseconds (%d records):\n",
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data->rec_count);
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printf("%11s%11s %s\n", "Mark", "Elapsed", "Stage");
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prev = print_time_record(rec, 0);
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/* Sort records by increasing time */
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qsort(data->record, data->rec_count, sizeof(*rec), h_compare_record);
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for (i = 1, rec++; i < data->rec_count; i++, rec++) {
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if (rec->id && !rec->start_us)
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prev = print_time_record(rec, prev);
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}
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if (data->rec_count > RECORD_COUNT)
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printf("Overflowed internal boot id table by %d entries\n"
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"Please increase CONFIG_(SPL_)BOOTSTAGE_RECORD_COUNT\n",
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data->rec_count - RECORD_COUNT);
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puts("\nAccumulated time:\n");
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for (i = 0, rec = data->record; i < data->rec_count; i++, rec++) {
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if (rec->start_us)
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prev = print_time_record(rec, -1);
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}
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}
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/**
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* Append data to a memory buffer
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*
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* Write data to the buffer if there is space. Whether there is space or not,
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* the buffer pointer is incremented.
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*
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* @param ptrp Pointer to buffer, updated by this function
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* @param end Pointer to end of buffer
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* @param data Data to write to buffer
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* @param size Size of data
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*/
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static void append_data(char **ptrp, char *end, const void *data, int size)
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{
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char *ptr = *ptrp;
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*ptrp += size;
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if (*ptrp > end)
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return;
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memcpy(ptr, data, size);
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}
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int bootstage_stash(void *base, int size)
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{
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const struct bootstage_data *data = gd->bootstage;
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struct bootstage_hdr *hdr = (struct bootstage_hdr *)base;
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const struct bootstage_record *rec;
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char buf[20];
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char *ptr = base, *end = ptr + size;
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int i;
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if (hdr + 1 > (struct bootstage_hdr *)end) {
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debug("%s: Not enough space for bootstage hdr\n", __func__);
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return -ENOSPC;
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}
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/* Write an arbitrary version number */
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hdr->version = BOOTSTAGE_VERSION;
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hdr->count = data->rec_count;
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hdr->size = 0;
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hdr->magic = BOOTSTAGE_MAGIC;
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hdr->next_id = data->next_id;
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ptr += sizeof(*hdr);
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/* Write the records, silently stopping when we run out of space */
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for (rec = data->record, i = 0; i < data->rec_count; i++, rec++)
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append_data(&ptr, end, rec, sizeof(*rec));
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/* Write the name strings */
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for (rec = data->record, i = 0; i < data->rec_count; i++, rec++) {
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const char *name;
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name = get_record_name(buf, sizeof(buf), rec);
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append_data(&ptr, end, name, strlen(name) + 1);
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}
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/* Check for buffer overflow */
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if (ptr > end) {
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debug("%s: Not enough space for bootstage stash\n", __func__);
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return -ENOSPC;
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}
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/* Update total data size */
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hdr->size = ptr - (char *)base;
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debug("Stashed %d records\n", hdr->count);
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return 0;
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}
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int bootstage_unstash(const void *base, int size)
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{
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const struct bootstage_hdr *hdr = (struct bootstage_hdr *)base;
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struct bootstage_data *data = gd->bootstage;
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const char *ptr = base, *end = ptr + size;
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struct bootstage_record *rec;
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uint rec_size;
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int i;
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if (size == -1)
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end = (char *)(~(uintptr_t)0);
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if (hdr + 1 > (struct bootstage_hdr *)end) {
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debug("%s: Not enough space for bootstage hdr\n", __func__);
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return -EPERM;
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}
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if (hdr->magic != BOOTSTAGE_MAGIC) {
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debug("%s: Invalid bootstage magic\n", __func__);
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return -ENOENT;
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}
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if (ptr + hdr->size > end) {
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debug("%s: Bootstage data runs past buffer end\n", __func__);
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return -ENOSPC;
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}
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if (hdr->count * sizeof(*rec) > hdr->size) {
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debug("%s: Bootstage has %d records needing %lu bytes, but "
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"only %d bytes is available\n", __func__, hdr->count,
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(ulong)hdr->count * sizeof(*rec), hdr->size);
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return -ENOSPC;
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}
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if (hdr->version != BOOTSTAGE_VERSION) {
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debug("%s: Bootstage data version %#0x unrecognised\n",
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__func__, hdr->version);
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return -EINVAL;
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}
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if (data->rec_count + hdr->count > RECORD_COUNT) {
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debug("%s: Bootstage has %d records, we have space for %d\n"
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"Please increase CONFIG_(SPL_)BOOTSTAGE_RECORD_COUNT\n",
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__func__, hdr->count, RECORD_COUNT - data->rec_count);
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return -ENOSPC;
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}
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ptr += sizeof(*hdr);
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/* Read the records */
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rec_size = hdr->count * sizeof(*data->record);
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memcpy(data->record + data->rec_count, ptr, rec_size);
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/* Read the name strings */
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ptr += rec_size;
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for (rec = data->record + data->next_id, i = 0; i < hdr->count;
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i++, rec++) {
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rec->name = ptr;
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if (spl_phase() == PHASE_SPL)
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rec->name = strdup(ptr);
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/* Assume no data corruption here */
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ptr += strlen(ptr) + 1;
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}
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/* Mark the records as read */
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data->rec_count += hdr->count;
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data->next_id = hdr->next_id;
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debug("Unstashed %d records\n", hdr->count);
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return 0;
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}
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int bootstage_get_size(void)
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{
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struct bootstage_data *data = gd->bootstage;
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struct bootstage_record *rec;
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int size;
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int i;
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size = sizeof(struct bootstage_data);
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for (rec = data->record, i = 0; i < data->rec_count;
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i++, rec++)
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size += strlen(rec->name) + 1;
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return size;
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}
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int bootstage_init(bool first)
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{
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struct bootstage_data *data;
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int size = sizeof(struct bootstage_data);
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gd->bootstage = (struct bootstage_data *)malloc(size);
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if (!gd->bootstage)
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return -ENOMEM;
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data = gd->bootstage;
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memset(data, '\0', size);
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if (first) {
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data->next_id = BOOTSTAGE_ID_USER;
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bootstage_add_record(BOOTSTAGE_ID_AWAKE, "reset", 0, 0);
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}
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return 0;
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}
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