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Altera_Forum's avatar
Altera_Forum
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15 years ago

Mutex - uClinux (without mmu)

Hi I have a project thar includes 2 NIOS2 CPUs. Both need to access the same memory area in an SRAM. One of the CPUs runs software developed with the NIOS2 IDE, another runs uClinux. ...
Altera_Forum's avatar
Altera_Forum
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15 years ago

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Another question: my shared SRAM has base address = 0x04000000. Should I read/write it using base address = 0x84000000?

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If you want data to be immediately visible to another processor or peripheral, yes. I am pretty sure there are macros in uClinux that take care of this for you, check -- you might already be using them. (I am using the MMU version so can't check quickly myself). For Altera HAL, have a look at alt_remap_uncached and alt_dcache_flush.