qemu/tests/libqos/fw_cfg-pc.c
Anthony Liguori 234c69c5f9 libqos: add fw_cfg support
fw_cfg is needed to get the top of memory which is necessary for
doing PCI allocation and allocating RAM for DMA.

Add a PC version of fw_cfg and enough abstraction to support other
platforms.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Message-id: 1366123521-4330-4-git-send-email-aliguori@us.ibm.com
2013-04-17 10:26:05 -05:00

41 lines
778 B
C

/*
* libqos fw_cfg 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/fw_cfg-pc.h"
#include "libqtest.h"
#include <glib.h>
static void pc_fw_cfg_select(QFWCFG *fw_cfg, uint16_t key)
{
outw(0x510, key);
}
static void pc_fw_cfg_read(QFWCFG *fw_cfg, void *data, size_t len)
{
uint8_t *ptr = data;
int i;
for (i = 0; i < len; i++) {
ptr[i] = inb(0x511);
}
}
QFWCFG *pc_fw_cfg_init(void)
{
QFWCFG *fw_cfg = g_malloc0(sizeof(*fw_cfg));
fw_cfg->select = pc_fw_cfg_select;
fw_cfg->read = pc_fw_cfg_read;
return fw_cfg;
}