diff options
Diffstat (limited to 'src/mainboard/emulation')
| -rw-r--r-- | src/mainboard/emulation/qemu-i440fx/fw_cfg.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/mainboard/emulation/qemu-i440fx/fw_cfg.c b/src/mainboard/emulation/qemu-i440fx/fw_cfg.c index c5d5a47008..6a9ef03867 100644 --- a/src/mainboard/emulation/qemu-i440fx/fw_cfg.c +++ b/src/mainboard/emulation/qemu-i440fx/fw_cfg.c @@ -25,20 +25,22 @@ #define FW_CFG_PORT_CTL 0x0510 #define FW_CFG_PORT_DATA 0x0511 -static unsigned char fw_cfg_detected = 0xff; +static int fw_cfg_detected; static int fw_cfg_present(void) { static const char qsig[] = "QEMU"; unsigned char sig[4]; + int detected = 0; - if (fw_cfg_detected == 0xff) { + if (fw_cfg_detected == 0) { fw_cfg_get(FW_CFG_SIGNATURE, sig, sizeof(sig)); - fw_cfg_detected = (memcmp(sig, qsig, 4) == 0) ? 1 : 0; + detected = memcmp(sig, qsig, 4) == 0; printk(BIOS_INFO, "QEMU: firmware config interface %s\n", - fw_cfg_detected ? "detected" : "not found"); + detected ? "detected" : "not found"); + fw_cfg_detected = detected + 1; } - return fw_cfg_detected; + return fw_cfg_detected - 1; } static void fw_cfg_select(uint16_t entry) |