mirror of
https://github.com/suchmememanyskill/TegraExplorer.git
synced 2024-11-08 13:11:54 +00:00
231 lines
7.4 KiB
C
231 lines
7.4 KiB
C
/*
|
|
* Copyright (c) 2019-2020 shchmue
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/*
|
|
ISC License
|
|
|
|
hactool Copyright (c) 2018, SciresM
|
|
|
|
Permission to use, copy, modify, and/or distribute this software for any
|
|
purpose with or without fee is hereby granted, provided that the above
|
|
copyright notice and this permission notice appear in all copies.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include "cached_storage.h"
|
|
|
|
#include <gfx_utils.h>
|
|
#include <mem/heap.h>
|
|
|
|
#include <string.h>
|
|
|
|
static ALWAYS_INLINE cache_block_t *cache_block_init(cached_storage_ctx_t *ctx) {
|
|
cache_block_t *block = calloc(1, sizeof(cache_block_t));
|
|
block->buffer = malloc(ctx->block_size);
|
|
block->index = -1;
|
|
return block;
|
|
}
|
|
|
|
void save_cached_storage_init(cached_storage_ctx_t *ctx, substorage *base_storage, uint32_t block_size, uint32_t cache_size) {
|
|
memcpy(&ctx->base_storage, base_storage, sizeof(substorage));
|
|
ctx->block_size = block_size;
|
|
ctx->length = base_storage->length;
|
|
ctx->cache_size = cache_size;
|
|
|
|
list_init(&ctx->blocks);
|
|
for (uint32_t i = 0; i < cache_size; i++) {
|
|
cache_block_t *block = cache_block_init(ctx);
|
|
list_append(&ctx->blocks, &block->link);
|
|
}
|
|
}
|
|
|
|
void save_cached_storage_init_from_sector_storage(cached_storage_ctx_t *ctx, sector_storage *base_storage, uint32_t cache_size) {
|
|
save_cached_storage_init(ctx, &base_storage->base_storage, base_storage->sector_size, cache_size);
|
|
}
|
|
|
|
static void cache_block_finalize(cache_block_t **block) {
|
|
free((*block)->buffer);
|
|
free(*block);
|
|
}
|
|
|
|
void save_cached_storage_finalize(cached_storage_ctx_t *ctx) {
|
|
if (!ctx->blocks.next)
|
|
return;
|
|
LIST_FOREACH_SAFE(curr_block, &ctx->blocks) {
|
|
cache_block_t *block = CONTAINER_OF(curr_block, cache_block_t, link) ;
|
|
cache_block_finalize(&block);
|
|
}
|
|
}
|
|
|
|
static bool try_get_block_by_value(cached_storage_ctx_t *ctx, uint64_t index, cache_block_t **out_block) {
|
|
if (!ctx->blocks.next)
|
|
return false;
|
|
LIST_FOREACH_ENTRY(cache_block_t, block, &ctx->blocks, link) {
|
|
if (block->index == index) {
|
|
*out_block = block;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool flush_block(cached_storage_ctx_t *ctx, cache_block_t *block) {
|
|
if (!block->dirty)
|
|
return true;
|
|
|
|
uint64_t offset = block->index * ctx->block_size;
|
|
if (substorage_write(&ctx->base_storage, block->buffer, offset, block->length) != block->length) {
|
|
EPRINTF("Cached storage: Failed to write block!");
|
|
return false;
|
|
}
|
|
block->dirty = false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool read_block(cached_storage_ctx_t *ctx, cache_block_t *block, uint64_t index) {
|
|
uint64_t offset = index * ctx->block_size;
|
|
uint32_t length = ctx->block_size;
|
|
|
|
if (ctx->length != -1)
|
|
length = (uint32_t)MIN(ctx->length - offset, length);
|
|
|
|
if (substorage_read(&ctx->base_storage, block->buffer, offset, length) != length) {
|
|
EPRINTF("Cached storage: Failed to read block!");
|
|
return false;
|
|
}
|
|
block->length = length;
|
|
block->index = index;
|
|
block->dirty = false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static cache_block_t *get_block(cached_storage_ctx_t *ctx, uint64_t block_index) {
|
|
cache_block_t *block = NULL;
|
|
if (try_get_block_by_value(ctx, block_index, &block)) {
|
|
// Promote most recently used block to front of list if not already.
|
|
if (ctx->blocks.next != &block->link) {
|
|
list_remove(&block->link);
|
|
list_prepend(&ctx->blocks, &block->link);
|
|
}
|
|
return block;
|
|
}
|
|
|
|
// Get a pointer either to the least recently used block or to a newly allocated block if storage is empty.
|
|
bool block_is_new = false;
|
|
if (ctx->blocks.prev != &ctx->blocks) {
|
|
block = CONTAINER_OF(ctx->blocks.prev, cache_block_t, link);
|
|
if (!flush_block(ctx, block))
|
|
return NULL;
|
|
|
|
// Remove least recently used block from list.
|
|
list_remove(&block->link);
|
|
} else {
|
|
block = cache_block_init(ctx);
|
|
block_is_new = true;
|
|
}
|
|
|
|
if (!read_block(ctx, block, block_index)) {
|
|
if (block_is_new)
|
|
cache_block_finalize(&block);
|
|
return NULL;
|
|
}
|
|
|
|
list_prepend(&ctx->blocks, &block->link);
|
|
|
|
return block;
|
|
}
|
|
|
|
uint32_t save_cached_storage_read(cached_storage_ctx_t *ctx, void *buffer, uint64_t offset, uint64_t count) {
|
|
uint64_t remaining = count;
|
|
uint64_t in_offset = offset;
|
|
uint32_t out_offset = 0;
|
|
|
|
if (!is_range_valid(offset, count, ctx->length)) {
|
|
EPRINTF("Cached storage read out of range!");
|
|
return 0;
|
|
}
|
|
|
|
while (remaining) {
|
|
uint64_t block_index = in_offset / ctx->block_size;
|
|
uint32_t block_pos = (uint32_t)(in_offset % ctx->block_size);
|
|
cache_block_t *block = get_block(ctx,block_index);
|
|
if (!block) {
|
|
EPRINTFARGS("Cached storage read: Unable to get block\n at index %x", (uint32_t)block_index);
|
|
return 0;
|
|
}
|
|
|
|
uint32_t bytes_to_read = (uint32_t)MIN(remaining, ctx->block_size - block_pos);
|
|
|
|
memcpy((uint8_t *)buffer + out_offset, block->buffer + block_pos, bytes_to_read);
|
|
|
|
out_offset += bytes_to_read;
|
|
in_offset += bytes_to_read;
|
|
remaining -= bytes_to_read;
|
|
}
|
|
|
|
return out_offset;
|
|
}
|
|
|
|
uint32_t save_cached_storage_write(cached_storage_ctx_t *ctx, const void *buffer, uint64_t offset, uint64_t count) {
|
|
uint64_t remaining = count;
|
|
uint64_t in_offset = offset;
|
|
uint32_t out_offset = 0;
|
|
|
|
if (!is_range_valid(offset, count, ctx->length)) {
|
|
EPRINTF("Cached storage write out of range!");
|
|
return 0;
|
|
}
|
|
|
|
while (remaining) {
|
|
uint64_t block_index = in_offset / ctx->block_size;
|
|
uint32_t block_pos = (uint32_t)(in_offset % ctx->block_size);
|
|
cache_block_t *block = get_block(ctx,block_index);
|
|
if (!block) {
|
|
EPRINTFARGS("Cached storage write: Unable to get block\n at index %x", (uint32_t)block_index);
|
|
return 0;
|
|
}
|
|
|
|
uint32_t bytes_to_write = (uint32_t)MIN(remaining, ctx->block_size - block_pos);
|
|
|
|
memcpy(block->buffer + block_pos, (uint8_t *)buffer + out_offset, bytes_to_write);
|
|
|
|
block->dirty = true;
|
|
|
|
out_offset += bytes_to_write;
|
|
in_offset += bytes_to_write;
|
|
remaining -= bytes_to_write;
|
|
}
|
|
|
|
return out_offset;
|
|
}
|
|
|
|
bool save_cached_storage_flush(cached_storage_ctx_t *ctx) {
|
|
LIST_FOREACH_ENTRY(cache_block_t, block, &ctx->blocks, link) {
|
|
if (!flush_block(ctx, block))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|