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/*
* libqos fw_cfg support
*
* Copyright IBM, Corp. 2012-2013
* Copyright (C) 2013 Red Hat Inc.
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
* Markus Armbruster <armbru@redhat.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 "qemu/osdep.h"
#include "libqos/fw_cfg.h"
#include "libqtest.h"
#include "qemu/bswap.h"
#include "hw/nvram/fw_cfg.h"
void qfw_cfg_select(QFWCFG *fw_cfg, uint16_t key)
{
fw_cfg->select(fw_cfg, key);
}
void qfw_cfg_read_data(QFWCFG *fw_cfg, void *data, size_t len)
{
fw_cfg->read(fw_cfg, data, len);
}
void qfw_cfg_get(QFWCFG *fw_cfg, uint16_t key, void *data, size_t len)
{
qfw_cfg_select(fw_cfg, key);
qfw_cfg_read_data(fw_cfg, data, len);
}
uint16_t qfw_cfg_get_u16(QFWCFG *fw_cfg, uint16_t key)
{
uint16_t value;
qfw_cfg_get(fw_cfg, key, &value, sizeof(value));
return le16_to_cpu(value);
}
uint32_t qfw_cfg_get_u32(QFWCFG *fw_cfg, uint16_t key)
{
uint32_t value;
qfw_cfg_get(fw_cfg, key, &value, sizeof(value));
return le32_to_cpu(value);
}
uint64_t qfw_cfg_get_u64(QFWCFG *fw_cfg, uint16_t key)
{
uint64_t value;
qfw_cfg_get(fw_cfg, key, &value, sizeof(value));
return le64_to_cpu(value);
}
static void mm_fw_cfg_select(QFWCFG *fw_cfg, uint16_t key)
{
qtest_writew(fw_cfg->qts, fw_cfg->base, key);
}
/*
* The caller need check the return value. When the return value is
* nonzero, it means that some bytes have been transferred.
*
* If the fw_cfg file in question is smaller than the allocated & passed-in
* buffer, then the buffer has been populated only in part.
*
* If the fw_cfg file in question is larger than the passed-in
* buffer, then the return value explains how much room would have been
* necessary in total. And, while the caller's buffer has been fully
* populated, it has received only a starting slice of the fw_cfg file.
*/
size_t qfw_cfg_get_file(QFWCFG *fw_cfg, const char *filename,
void *data, size_t buflen)
{
uint32_t count;
uint32_t i;
unsigned char *filesbuf = NULL;
size_t dsize;
FWCfgFile *pdir_entry;
size_t filesize = 0;
qfw_cfg_get(fw_cfg, FW_CFG_FILE_DIR, &count, sizeof(count));
count = be32_to_cpu(count);
dsize = sizeof(uint32_t) + count * sizeof(struct fw_cfg_file);
filesbuf = g_malloc(dsize);
qfw_cfg_get(fw_cfg, FW_CFG_FILE_DIR, filesbuf, dsize);
pdir_entry = (FWCfgFile *)(filesbuf + sizeof(uint32_t));
for (i = 0; i < count; ++i, ++pdir_entry) {
if (!strcmp(pdir_entry->name, filename)) {
uint32_t len = be32_to_cpu(pdir_entry->size);
uint16_t sel = be16_to_cpu(pdir_entry->select);
filesize = len;
if (len > buflen) {
len = buflen;
}
qfw_cfg_get(fw_cfg, sel, data, len);
break;
}
}
g_free(filesbuf);
return filesize;
}
static void mm_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] = qtest_readb(fw_cfg->qts, fw_cfg->base + 2);
}
}
QFWCFG *mm_fw_cfg_init(QTestState *qts, uint64_t base)
{
QFWCFG *fw_cfg = g_malloc0(sizeof(*fw_cfg));
fw_cfg->base = base;
fw_cfg->qts = qts;
fw_cfg->select = mm_fw_cfg_select;
fw_cfg->read = mm_fw_cfg_read;
return fw_cfg;
}
void mm_fw_cfg_uninit(QFWCFG *fw_cfg)
{
g_free(fw_cfg);
}
static void io_fw_cfg_select(QFWCFG *fw_cfg, uint16_t key)
{
qtest_outw(fw_cfg->qts, fw_cfg->base, key);
}
static void io_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] = qtest_inb(fw_cfg->qts, fw_cfg->base + 1);
}
}
QFWCFG *io_fw_cfg_init(QTestState *qts, uint16_t base)
{
QFWCFG *fw_cfg = g_malloc0(sizeof(*fw_cfg));
fw_cfg->base = base;
fw_cfg->qts = qts;
fw_cfg->select = io_fw_cfg_select;
fw_cfg->read = io_fw_cfg_read;
return fw_cfg;
}
void io_fw_cfg_uninit(QFWCFG *fw_cfg)
{
g_free(fw_cfg);
}
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