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