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cmd: qfw: make fwcfg_present and fwcfg_dma_present public

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This patch is part of the qfw refactor work. This patch makes
qemu_fwcfg_present() and qemu_fwcfg_dma_present() public functions.

Signed-off-by: Miao Yan <yanmiaobest@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Miao Yan 2016-05-22 19:37:13 -07:00 committed by Bin Meng
parent 05dd6f183c
commit d3ad062392
2 changed files with 23 additions and 17 deletions
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37
cmd/qemu_fw_cfg.c
View File

@ -62,23 +62,14 @@ static void qemu_fwcfg_read_entry_dma(uint16_t entry,
__asm__ __volatile__ ("pause");
}
static bool qemu_fwcfg_present(void)
bool qemu_fwcfg_present(void)
{
uint32_t qemu;
qemu_fwcfg_read_entry_pio(FW_CFG_SIGNATURE, 4, &qemu);
return be32_to_cpu(qemu) == QEMU_FW_CFG_SIGNATURE;
return fwcfg_present;
}
static bool qemu_fwcfg_dma_present(void)
bool qemu_fwcfg_dma_present(void)
{
uint8_t dma_enabled;
qemu_fwcfg_read_entry_pio(FW_CFG_ID, 1, &dma_enabled);
if (dma_enabled & FW_CFG_DMA_ENABLED)
return true;
return false;
return fwcfg_dma_present;
}
void qemu_fwcfg_read_entry(uint16_t entry, uint32_t length, void *address)
@ -257,9 +248,21 @@ static int qemu_fwcfg_list_firmware(void)
void qemu_fwcfg_init(void)
{
fwcfg_present = qemu_fwcfg_present();
if (fwcfg_present)
fwcfg_dma_present = qemu_fwcfg_dma_present();
uint32_t qemu;
uint32_t dma_enabled;
fwcfg_present = false;
fwcfg_dma_present = false;
qemu_fwcfg_read_entry_pio(FW_CFG_SIGNATURE, 4, &qemu);
if (be32_to_cpu(qemu) == QEMU_FW_CFG_SIGNATURE)
fwcfg_present = true;
if (fwcfg_present) {
qemu_fwcfg_read_entry_pio(FW_CFG_ID, 1, &dma_enabled);
if (dma_enabled & FW_CFG_DMA_ENABLED)
fwcfg_dma_present = true;
}
}
static int qemu_fwcfg_do_list(cmd_tbl_t *cmdtp, int flag,
@ -323,7 +326,7 @@ static int do_qemu_fw(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
int ret;
cmd_tbl_t *fwcfg_cmd;
if (!fwcfg_present) {
if (!qemu_fwcfg_present()) {
printf("QEMU fw_cfg interface not found\n");
return CMD_RET_USAGE;
}

3
include/qemu_fw_cfg.h
View File

@ -167,4 +167,7 @@ struct fw_file *qemu_fwcfg_file_iter_init(struct fw_cfg_file_iter *iter);
struct fw_file *qemu_fwcfg_file_iter_next(struct fw_cfg_file_iter *iter);
bool qemu_fwcfg_file_iter_end(struct fw_cfg_file_iter *iter);
bool qemu_fwcfg_present(void);
bool qemu_fwcfg_dma_present(void);
#endif