请教一个ata设备识别的奇怪问题

2014-09-01 03:49:08 731 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

VxWorks 6.9系统，P2020bsp，配置了si31xx的ata硬盘，挂在pcie上，硬盘设备为"/ata0:1"，之前使用的时候都是好用的，今天突然识别不出来"/ata0:1"，却出来一个“/cdrom0:0”的设备，不知道是怎么回事，为什么会识别为cdrom呢？
可以肯定是底板的问题，因为相同的硬盘和子卡换到其他底板上就正常，其他正常的子卡和硬盘换到这个底板上也不正常。现在想知道可能是哪里的问题，应该怎么查找呢？同一个底板上的两个卡位都是相同的问题。
我使用vxbPciHeaderShow 命令查看pci设备的寄存器也是相同的。
如下：



-> vxbPciHeaderShow 0x0034e750,1,0,0

vendor ID =                   0x1095

device ID =                   0x3132

command register =            0x0007

status register =             0x0010

revision ID =                 0x01

class code =                  0x01

sub class code =              0x80

programming interface =       0x00

cache line =                  0x08

latency time =                0x00

header type =                 0x00

BIST =                        0x00

base address 0 =              0xa4000004

base address 1 =              0x00000000

base address 2 =              0xa4004004

base address 3 =              0x00000000

base address 4 =              0xa8000001

base address 5 =              0x00000000

cardBus CIS pointer =         0x00000000

sub system vendor ID =        0x1095

sub system ID =               0x3132

expansion ROM base address =  0x00000000

interrupt line =              0x08

interrupt pin =               0x01

min Grant =                   0x00

max Latency =                 0x00

Capabilities - Power Management 

Capabilities - Message Signaled Interrupts: 0x5c control 0x80 Disabled, 64-bit, MME: 0 MMC: 0

        Address: 0000000000000000  Data: 0x0000

        Per-vector Mask: Unsupported 

Capabilities - PCIe: Legacy Endpoint, IRQ 0

        Device: Max Payload: 1024 bytes, Extended Tag: 5-bit

                Acceptable Latency: L0 - <64ns, L1 - <1us

                Errors Enabled: 

                Max Read Request 512 bytes

        Link: MAX Speed - 2.5Gb/s, MAX Width - by 1 Port - 0 ASPM - L0s

                Latency: L0s - >4us, L1 - >64us

                ASPM - Disabled, RCB - 64bytes

                Speed - 2.5Gb/s, Width - by 1

Ext Capabilities - Advanced Error Reporting. 0x100. Version 1. AER Control: 0xa0 

        Uncorrectable : Mask 0x0. Severity 0x62011 

        Uncorrectable Status: 

        Correctable : Mask 0x0. 

        Correctable Status: 

        HeaderLog: 

        Error Source Identification: 0x0 0x0 



value = 0 = 0x0