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/*
* libqos malloc support for PC
*
* Copyright IBM, Corp. 2012-2013
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "libqos/malloc-pc.h"
#include "libqos/fw_cfg.h"
#define NO_QEMU_PROTOS
#include "hw/nvram/fw_cfg.h"
#include "qemu-common.h"
#include <glib.h>
#define PAGE_SIZE (4096)
/*
* Mostly for valgrind happiness, but it does offer
* a chokepoint for debugging guest memory leaks, too.
*/
void pc_alloc_uninit(QGuestAllocator *allocator)
{
alloc_uninit(allocator);
}
QGuestAllocator *pc_alloc_init_flags(QAllocOpts flags)
{
QGuestAllocator *s = g_malloc0(sizeof(*s));
uint64_t ram_size;
QFWCFG *fw_cfg = pc_fw_cfg_init();
MemBlock *node;
s->opts = flags;
s->page_size = PAGE_SIZE;
ram_size = qfw_cfg_get_u64(fw_cfg, FW_CFG_RAM_SIZE);
/* Start at 1MB */
s->start = 1 << 20;
/* Respect PCI hole */
s->end = MIN(ram_size, 0xE0000000);
/* clean-up */
g_free(fw_cfg);
QTAILQ_INIT(&s->used);
QTAILQ_INIT(&s->free);
node = mlist_new(s->start, s->end - s->start);
QTAILQ_INSERT_HEAD(&s->free, node, MLIST_ENTNAME);
return s;
}
inline QGuestAllocator *pc_alloc_init(void)
{
return pc_alloc_init_flags(ALLOC_NO_FLAGS);
}
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