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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)
typedef struct PCAlloc
{
QGuestAllocator alloc;
uint64_t start;
uint64_t end;
} PCAlloc;
static uint64_t pc_alloc(QGuestAllocator *allocator, size_t size)
{
PCAlloc *s = container_of(allocator, PCAlloc, alloc);
uint64_t addr;
size += (PAGE_SIZE - 1);
size &= PAGE_SIZE;
g_assert_cmpint((s->start + size), <=, s->end);
addr = s->start;
s->start += size;
return addr;
}
static void pc_free(QGuestAllocator *allocator, uint64_t addr)
{
}
QGuestAllocator *pc_alloc_init(void)
{
PCAlloc *s = g_malloc0(sizeof(*s));
uint64_t ram_size;
QFWCFG *fw_cfg = pc_fw_cfg_init();
s->alloc.alloc = pc_alloc;
s->alloc.free = pc_free;
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);
return &s->alloc;
}
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