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请问memmapbase地址0x1000_0000是如何映射到0x6000_0000 #109

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mangolou opened this issue Feb 6, 2023 · 1 comment
Open

请问memmapbase地址0x1000_0000是如何映射到0x6000_0000 #109

mangolou opened this issue Feb 6, 2023 · 1 comment

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@mangolou
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mangolou commented Feb 6, 2023

你好!
请教一个问题，工程中需要把RV_BOOT.bin搬运到ddr中，设备树中ddr寄存器起始地址x6000_0000，而裸机的搬运代码中使用的是0x1000_0000。为什么ddr会有两个地址，这两个地址是否存在着映射关系，有点不理解，麻烦指点迷津，万分谢谢！
@wakafa1
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wakafa1 commented Feb 7, 2023

存在映射关系，请参考

NutShell/src/main/scala/system/NutShell.scala

Line 93 in 7c441dc

val memAddrMap = Module(new SimpleBusAddressMapper((memMapRegionBits, memMapBase)))

FuWenyi pushed a commit to Jiayuah/NutShell that referenced this issue Mar 28, 2023
@gravelcai
Fix the replacer bug under condition of clk_div_by_2 (OSCPU#109)
3137743 
* fix a bug that updates the replacer's SRAM at wrong beats.
--add a flip-flop, beating 'repl_state' one more cycle.

* fix a mistake, make it compatible with full clk.

* Now its compatible with full clk.

* beats 'next_state' to next cycle instead of 'repl_state'.
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@wakafa1 @mangolou