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398 Discussions
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Discussion
ARM Compiler 6 fail to encoding Chinese characters. E.G. '压' '预' '询' etc
100
views
4
replies
Latest
3 days ago
by
T.W
Suggested Answer
请教：1、集成ARM TrustZone内核的CPU/SOC,是否可由外部SE（单片机小系统）硬件信号优先控制保持TEE状态，不切换回REE？即：当REE切换到TEE后，外部SE（单片机小系统）输出控制信号，保持TEE状态，不切换回REE，只有当SE释放此控制信号，TEE才能自主切换回REE。2、ARM TrustZone内核硬件上能支持这样设计吗？谢谢。
0
98
views
2
replies
Latest
6 days ago
by
Song Bin 宋斌
Discussion
馬上報名！【免費線上研討會】30分鐘看懂LoRa技術，掌握智慧城市應用關鍵！
288
views
3
replies
Latest
21 days ago
by
Song Bin 宋斌
Suggested Answer
SQPI bus 如何设置能支援外扩RAM
0
221
views
1
reply
Latest
21 days ago
by
Jing Wang
Discussion
浙大首届Arm人工智能算法大赛强势来袭，万元奖金等你来夺！
511
views
2
replies
Latest
24 days ago
by
有芯度
Not Answered
Tag_ABI_align_preserved: 8-byte, except leaf SP 是什么含义？有什么作用？
0
218
views
2
replies
Latest
24 days ago
by
kingstying
Suggested Answer
neon 代码比C代码效率为啥比理论值相差这么大？
0
260
views
1
reply
Latest
26 days ago
by
Zhongwei Yao
Answered
请教：ARM多核处理器中不同的核是否可配置为纯REE环境和（REE+TEE）或纯TEE环境？实现“不同CPU核的REE与TEE同时并行运行，并相互通信”？（手机上是否就这样做的？）谢谢。
0
488
views
5
replies
Latest
26 days ago
by
zhonghua
Answered
浮点运算错误
0
654
views
9
replies
Latest
27 days ago
by
kingstying
Suggested Answer
cortex-a53 A64模式 如何发出INCR(2 or 4)传输去访问normal non-cacheable属性空间
0
864
views
10
replies
Latest
27 days ago
by
Andy1986
Suggested Answer
gdb 调试汇编指令时看不到 NEON寄存器.
0
195
views
1
reply
Latest
27 days ago
by
Zhongwei Yao
Suggested Answer
请问在用arm neon指令优化程序时，在一个for循环下，分别用int32x2_t和int32x4_t类型的指令，后者的速度并没有按照理论上的速度更快，反而比前者慢是怎么回事呢？必须要对生成的汇编指令进行优化吗？谢谢指教。
0
1224
views
6
replies
Latest
27 days ago
by
Zhongwei Yao
Suggested Answer
请教：1、REE切换到TEE后，TEE能否一直主动控制保持在TEE状态，不切换到REE？即：若没有TEE同意切换，即使有REE任何硬件中断也不会切换回REE？2、若1不能实现，想问：REE切换到TEE后，TEE可保持TEE状态不切换回REE的保持时间最大是多少？这个最大保持时间根据什么定义？3、目前已有TEE应用中，TEE的连续保持时间是怎么定义的？ 谢谢。
0
188
views
1
reply
Latest
1 month ago
by
Ethan Zhang
Answered
OP-TEE相关的问题
0
1556
views
7
replies
Latest
1 month ago
by
hahaliu
Suggested Answer
REE切换到TEE时，REE要先保存REE当前环境的参数，在TEE切换回REE时再恢复。想问下：1、要保存的REE当前环境的参数，存储在哪里？2、若REE切换到TEE后，假设TEE按复位流程，从ROM开始重新装载TEE系统，而后再切换回REE，想问：REE是否还能恢复原来环境状态？
0
196
views
1
reply
Latest
1 month ago
by
Ethan Zhang
Suggested Answer
请教下： 1、手机指纹传感器模块（硬件），是否是只连接TEE环境，为TEE环境专用？因此REE环境不会读到指纹传感器信息？ 2、在TEE环境录入预存的用户指纹信息，是要加密存储在FLASH中保存，并在每次上电或复位时，再调入TEE内存中解密应用？ 谢谢。
0
204
views
1
reply
Latest
1 month ago
by
Ethan Zhang
Suggested Answer
请教下:1、目前手机TEE系统的上电或复位流程是否是: 先安全引导启动TEE系统正常后,再由TEE系统控制切换到REE系统环境,再引导启动REE系统? 2、若是的话，是否可设计TEE系统在某种情况下，在上电或复位后，在安全引导启动TEE系统正常后，先暂停留在TEE状态，不引导启动REE？谢谢。
0
209
views
1
reply
Latest
1 month ago
by
Ethan Zhang
Suggested Answer
请教下：TEE安全启动程序是存储在ROM中还是在FLASH中？若是在FLASH中，其是否通过ROOT方式更新或修改？谢谢
0
796
views
11
replies
Latest
1 month ago
by
Ethan Zhang
Suggested Answer
请教：RK3288 T760 GPU ubuntu 环境配置和使用的问题
0
808
views
8
replies
Latest
1 month ago
by
Gary Wang 王刚
Suggested Answer
有关Mali的GPU性能优化问题
0
215
views
1
reply
Latest
1 month ago
by
Gary Wang 王刚
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