[参考译文] TDA4VM：如何在 J7200器件中检查复位原因

您好、Jace：

在 TRM 中 、CTRLMMR_WKUP_RESET_SRC_STAT 给出了复位的原因。

- Keerthy

您好 Keerthy

感谢您提供的信息。

您还能让我知道如何检查看门狗重置原因吗？

BR

杰斯

您好、Jace：

编号 我在 TRM 中没有看到任何内容。 也就是说、如果我们有问题、我会再次与硬件专家核实。 我会让你保持发布
就会立即收到他们的反馈。

- Keerthy

您好 Keerthy。

我使用 TDA4VM 板测试了看门狗。

我通过 wdctl 触发了看门狗、并在60秒后重新启动电路板

但当我检查0x43000050时、所有位都为"0"。

root@j7200-evm:~# wdctl
[   19.339943] watchdog: watchdog0: nowayout prevents watchdog being stopped!
[   19.346838] watchdog: watchdog0: watchdog did not stop!
Device:        /dev/watchdog0
Identity:      K3 RTI Watchdog [version 0]
Timeout:       60 seconds
Pre-timeout:    0 seconds
Timeleft:      60 seconds
FLAG           DESCRIPTION           STATUS BOOT-STATUS
KEEPALIVEPING  Keep alive ping reply      1           0
root@j7200-evm:~#
U-Boot SPL 2023.04-ti-gd2612223375a (Mar 13 2024 - 19:15:42 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.2.4--v09.02.04 (Kool Koala)')
Trying to boot from MMC2
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Loading Environment from nowhere... OK
Starting ATF on ARM64 core...

NOTICE:  BL31: v2.10.0(release):v2.10.0-367-g00f1ec6b87-dirty
NOTICE:  BL31: Built : 16:09:05, Feb  9 2024
I/TC:
I/TC: OP-TEE version: 4.1.0-51-g012cdca49 (gcc version 11.4.0 (GCC)) #1 Tue Jan 30 10:48:03 UTC 2024 aarch64
I/TC: WARNING: This OP-TEE configuration might be insecure!
I/TC: WARNING: Please check optee.readthedocs.io/.../porting_guidelines.html
I/TC: Primary CPU initializing
I/TC: GIC redistributor base address not provided
I/TC: Assuming default GIC group status and modifier
I/TC: SYSFW ABI: 3.1 (firmware rev 0x0009 '9.2.4--v09.02.04 (Kool Koala)')
I/TC: HUK Initialized
I/TC: Activated SA2UL device
I/TC: Fixing SA2UL firewall owner for GP device
I/TC: Enabled firewalls for SA2UL TRNG device
I/TC: SA2UL TRNG initialized
I/TC: SA2UL Drivers initialized
I/TC: Primary CPU switching to normal world boot

U-Boot SPL 2023.04-ti-gd2612223375a (Mar 13 2024 - 19:15:42 +0000)
SYSFW ABI: 3.1 (firmware rev 0x0009 '9.2.4--v09.02.04 (Kool Koala)')
Detected: J7X-BASE-CPB rev A
Detected: J7X-VSC8514-ETH rev E2
Trying to boot from MMC2
am654_sdhci mmc@4fb0000: pinctrl_select_state_full: uclass_get_device_by_phandle_id: err=-19
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted
Warning: Detected image signing certificate on GP device. Skipping certificate to prevent boot failure. This will fail if the image was also encrypted


U-Boot 2023.04-ti-gd2612223375a (Mar 13 2024 - 19:15:42 +0000)

SoC:   J7200 SR2.0 GP
Model: Texas Instruments K3 J7200 SoC
Board: J7200X-PM2-SOM rev E8
DRAM:  2 GiB (effective 4 GiB)
Core:  85 devices, 32 uclasses, devicetree: separate
Flash: 0 Bytes
MMC:   mmc@4f80000: 0, mmc@4fb0000: 1
Loading Environment from nowhere... OK
In:    serial@2800000
Out:   serial@2800000
Err:   serial@2800000
am65_cpsw_nuss ethernet@46000000: K3 CPSW: nuss_ver: 0x6BA02102 cpsw_ver: 0x6BA82102 ale_ver: 0x00293904 Ports:1 mdio_freq:1000000
Detected: J7X-BASE-CPB rev A
Detected: J7X-VSC8514-ETH rev E2
Net:   eth0: ethernet@46000000port@1
Hit any key to stop autoboot:  0
=> md.l 0x43000050 1
43000050: 00000000                             ....
=> md.l 0x43002050 1
43002050: 00000000                             ....
=> md.l 0x43000050 1
43000050: 00000000

您能否再次使用 EVM 检查看门狗功能。

BR

杰斯

好的。 我会让硬件专家了解这种行为。 除了这个位、我们没有任何其他方式。

此致、

Keerthy  

您好、

如果您有权访问 JTAG 或调试器、您是否可以通过 M3寄存器读取相同的内容并仔细确认位19读数为0？

- Keerthy

您好 Keerthy。

看门狗复位后、电路板 正确启动。 这样我就可以读取 Uboot 或 Linux 控制台中的寄存器。

为什么要我通过 JTAG 或其他调试器读取值？

这些寄存器是否只能通过 JTAG 读取？

什么是 M3寄存器？ 您能告诉我寄存器的名称和地址吗？

BR

杰斯

我不明白。 您能解释一下所需的看门狗吗？
在 SoC 内部、由 WWDRTI 生成的转到 CPU 内核和 ESM。 如果已配置 ESM、则可以向 PMIC 生成一个信号、然后由 PMIC 将 SoC 复位。 我认为 WWDRTI 无法直接复位 SoC。

Kevin

您好 Kevin。

很抱歉晚回复。

实际上、我不知道 TDA4VM 板中的看门狗确切顺序。

现在我 知道 PMIC 会触发看门狗复位。

那么、如何在 启动后通过看门狗复位来检查电路板是否复位？

您能否更详细地解释看门狗复位序列？

什么是 ESM？

BR

杰斯

您使用的是什么 PDN？

Kevin