mirror of
https://git.proxmox.com/git/qemu
synced 2025-10-31 13:19:36 +00:00
234c69c5f9
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
41 lines
778 B
C
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;
|
|
}
|