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[microblaze-uclinux] What is the maxium BRAM?
I'm now quite confused by the BRAM configuration. On the spartan 3E datasheet, XC3S500E should have 360Kbit Block RAM. But when configuring the MicroBlaze with 8KByte On-Chip RAM for data and instruction (ilmb and dlmb), the RAM usage is already 100%, 20 of 20 Blocks. Where are the other BRAMs?
And for Virtex 4. When configuring XC4VFX12 with PowerPC, I can use 4KByte docm_cntlr and iocm_cntlr and 64KByte plb_bram_if_cntlr. But with MicroBlaze, 32KB opb_bram_if_cntlr is already overmapped. (4KByte ilmb and dlmb).
Why is there a difference between MicroBlaze and PowerPC? Does the MicroBlaze use some of the RAM resource for itself?