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coreboot-kgpe-d16/src/commonlib/mem_pool.c

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coreboot: add memory pool infrastructure The memory pool infrastructure provides an allocator with very simple free()ing semantics: only the most recent allocation can be freed from the pool. However, it can be reset and when not used any longer providing the entire region for future allocations. Change-Id: I5ae9ab35bb769d78bbc2866c5ae3b5ce2cdce5fa Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/9129 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2015-03-26 18:29:12 +01:00
/*
* This file is part of the coreboot project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that 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.
*/
commonlib: Prepare code to be included in cbfstool builds. Some of the files need to be adjusted so that they can be used both in cbfstool as well as coreboot proper. For coreboot, add a <sys/types.h> file such that proper types can be included from both the tools and coreboot. The other chanes are to accomodate stricter checking in cbfstool. BUG=chrome-os-partner:48412 BUG=chromium:445938 BRANCH=None TEST=Built on glados including tools. Booted. Change-Id: I771c6675c64b8837f775427721dd3300a8fa1bc0 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/12784 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2015-12-16 00:49:12 +01:00
#include <commonlib/helpers.h>
coreboot: introduce commonlib Instead of reaching into src/include and re-writing code allow for cleaner code sharing within coreboot and its utilities. The additional thing needed at this point is for the utilities to provide a printk() declaration within a <console/console.h> file. That way code which uses printk() can than be mapped properly to verbosity of utility parameters. Change-Id: I9e46a279569733336bc0a018aed96bc924c07cdd Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/11592 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
2015-09-08 20:34:43 +02:00
#include <commonlib/mem_pool.h>
coreboot: add memory pool infrastructure The memory pool infrastructure provides an allocator with very simple free()ing semantics: only the most recent allocation can be freed from the pool. However, it can be reset and when not used any longer providing the entire region for future allocations. Change-Id: I5ae9ab35bb769d78bbc2866c5ae3b5ce2cdce5fa Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/9129 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
2015-03-26 18:29:12 +01:00
void *mem_pool_alloc(struct mem_pool *mp, size_t sz)
{
void *p;
/* Make all allocations be at least 8 byte aligned. */
sz = ALIGN_UP(sz, 8);
/* Determine if any space available. */
if ((mp->size - mp->free_offset) < sz)
return NULL;
p = &mp->buf[mp->free_offset];
mp->free_offset += sz;
mp->last_alloc = p;
return p;
}
void mem_pool_free(struct mem_pool *mp, void *p)
{
/* Determine if p was the most recent allocation. */
if (p == NULL || mp->last_alloc != p)
return;
mp->free_offset = mp->last_alloc - mp->buf;
/* No way to track allocation before this one. */
mp->last_alloc = NULL;
}