标签：过程 dom exec provides 其他 com http access lin
In order for the e200z4d core to be able to access memory, a valid MMU TLB entry has to be created. The SSCM does this automatically by reading the reset vector and modifying TLB entry 0 to create a 4 KB page containing the reset vector address. The MMU VLE bit is set depending on the status of the VLE bit within the RCHW. The 4 KB MMU page must be 4 KB aligned. This means that the most efficient place to put the application code is immediately after the boot sector. The 4 KB block provides sufficient space to: ? Add MMU entries for SRAM and peripherals ? Perform standard system initialisation tasks (initialise the SRAM, setup stack, copy constant data) ? Transfer execution to RAM, re-define the flash memory MMU entry and transfer execution back to flash memory. Finally, the SSCM sets the e200z4d core instruction pointer to the reset vector address and starts the core running.
标签：过程 dom exec provides 其他 com http access lin
原文地址：https://www.cnblogs.com/wjcdx/p/9245780.html
