The usage of "access flag" bit in translation table descriptor
Hi ARM expert, I felt confusion about "access flag" bit. should i set the access flag bit to 1 during set up the MMU table if i don't want see the "Access flag fault"?
View ArticleUsing DS-5 Streamline with Mali on Samsung Galaxy SIII
ABSTRACT This guide will show how to get ARM® DS-5™ Streamline™ support working on a production Samsung Galaxy SIII device, with minimal modifications. The resulting files generated will be a gatord,...
View Article融通高科与ST 公司签订MOU协议
2015年5月份，融通高科与ST 公司 在北京举行了战略合作伙伴关系谅解备忘录的签约仪式（MOU）。融通高科 董事长何中林、总经理常波、金融事业部总经理王礼宇，ST战略规划总监Jean-Claude Nataf、ST中国区投资总监 白胜天、ST安全芯片中国区总监陈德勇等出席了本次活动。
View Articlemmu question on Cortex A53
Hi ARM expert, If the virtual address space is 512G, and use 4KB granularity L1 table, are the 4K bytes enough for MMU table in this case? I mean that need only one L1 4KB table can mapping all...
View ArticleARMv8 mmu problem
Hi ARM experts, I have a problem in using armv8 mmu in bare-metal system: When using the 4KB translation granule, level 1 table which use D_Block convert VA to 1GB region PA. In Armv8 ARM page D4-1744,...
View ArticleSTM32启动代码启动相关的讨论
有些问题疑惑了很久，过来问下amanda_s，也希望大家都能够讨论、相互学习下。 STM32F4在MDK-ARM中的启动代码是这样的： 定义了READWRITE属性的栈区；定义了READWRITE属性的堆区；定义了READWRITE属性的异常向量表；定义了READONLY属性的异常向量处理函数，和一个堆栈的初始化汇编代码。...
View ArticleMGD processlist.cfg does not work
i am trying to use MGD in Galaxy S6 64bit device. if i don't use processlist.cfg, MGD is working fine. However, if i create processlist.cfg to /system/lib/egl , MGD does not work. i made...
View Articlestm32f4 IAP flash region
Hi guys, I want to use a region of flash for config. I want to overwrite this config region with values from a config file. What is the best approach? For instance I could use a constant for...
View Articledifference between literal and instructional comparators????
Greetings, as comparators used in flash patch unit will compare the fpb data with program counter if match then core will be halted. in cortex m4 there are 2 literal comparators and 6 instructional...
View Article百视通/ARM HTML5技术论坛顺利举行（附资料下载）
大家好！HTML5作为互联网领域的热词，相信大家早已耳熟能详了。这些年来HTML5技术的商业化推广几经起落，使得业界甚至出现了每年都是HTML5元年的幽默之言。不过，随着HTML5规范的最终定稿，2015年无疑是有史以来HTML5最火热的一年。据不完全统计，今年在我国举办的HTML5相关行业会议将达到50场以上，业界也纷纷爆出HTML5技术关联的企业启动IPO、初创公司获得十亿级估值等振奋人心的消息...
View ArticleDS5 connection issue with linux on Juno
Hi, I am running the Juno binaries and after linux boots up trying to connect to Juno. I am getting below error. How to resolve it ? I am selecting "Linux Kernel and/or Device Driver Debug" --->...
View ArticleHow to detect interrupt enabled flag in Cortex-M4 processor?
Hello, I wanna know if global interrupts are enabled or not. In ARM compiler,__disable_irq() function returns 0 if interrupts were disabled or not, but on GCC based compiler, this function is...
View ArticleHow to understand Device-nGRE?
Hi, experts, Re-Orderingis a new attribute in ARMv8. Can you explain Device-nGRE, and How to distinguish Device-nGRE and Device-nGnRE? Thanks.
View ArticleHow C++11/14 can improve readability without affecting performance
Often we hear embedded software engineers avoiding the usage of C++ because of being scared by potential performance hit or code size explosions. Even though some features of C++ can have significant...
View ArticleHow to use the performance monitor of Cortex-A9?
Hello experts, I feel I am an amateur. I tried to work the performance monitor of Cortex-A9 but it did not work. The followings are my codes. Please tell me what was wrong.
View Articleregarding arm gcc compiler
please help me resolving this issue during buil process arm-none-eabi-gcc -DUSE_STDPERIPH_DRIVER -I"H:/embedded systems/arm projects/template_project/inc" -I"H:/embedded systems/arm
View ArticleCannot post with Firefox
Hello, I just tried to post a question using Firefox (Windows 8.1 x64, Firefox 38.0.5) , but I got thrown back to the editor every time I pushed "Post". I had to post using Internet Explorer.. Also,...
View Article如何理解ARMv8中的Device-nGRE？
Hi experts， 请问如何理解ARMv8内存属性device中，引入的Re-Ordering概念，感觉实际意义不大。 或者可以举个例子来说明这个概念的必要性。 谢谢！
View ArticleNEON-Advanced SIMD vs. SIMD
Hello, I’m new to ARM architecture and was looking to get a better understanding of how it works. Most notably, the Cortex-A series and its DSP functionality. When reading through ARM’s webpage, it...
View ArticleThe reason why the exception frame forms on PSP?
Hello experts, I would like to ask the reason why the exception frame forms on PSP in the Cortex-M architecture. My understanding is that MSP (Main Stack Pointer) is the interrupt stack pointer and PSP...
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