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libqos: add fw_cfg support

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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
This commit is contained in:
Anthony Liguori 2013-04-16 09:45:17 -05:00
parent c4efe1cada
commit 234c69c5f9
5 changed files with 147 additions and 2 deletions
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34
tests/libqos/fw_cfg.h Normal file
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/*
* libqos fw_cfg support
*
* 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.
*/
#ifndef LIBQOS_FW_CFG_H
#define LIBQOS_FW_CFG_H
#include <stdint.h>
#include <sys/types.h>
typedef struct QFWCFG QFWCFG;
struct QFWCFG
{
void (*select)(QFWCFG *fw_cfg, uint16_t key);
void (*read)(QFWCFG *fw_cfg, void *data, size_t len);
};
void qfw_cfg_select(QFWCFG *fw_cfg, uint16_t key);
void qfw_cfg_read_data(QFWCFG *fw_cfg, void *data, size_t len);
void qfw_cfg_get(QFWCFG *fw_cfg, uint16_t key, void *data, size_t len);
uint16_t qfw_cfg_get_u16(QFWCFG *fw_cfg, uint16_t key);
uint32_t qfw_cfg_get_u32(QFWCFG *fw_cfg, uint16_t key);
uint64_t qfw_cfg_get_u64(QFWCFG *fw_cfg, uint16_t key);
#endif