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litedram_gen: Limit SDRAM size exposed to the CPU to 16MB. 

This is enough for the Initialization/Calibration and fixes the mapping issues
with large SDRAMs.
This commit is contained in:
Florent Kermarrec 2020-02-20 09:29:38 +01:00
parent 53d3a0a9c2
commit 07d2483481
1 changed files with 3 additions and 2 deletions
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litedram/gen.py
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@ -329,8 +329,9 @@ class LiteDRAMCore(SoCSDRAM):
# SoCSDRAM --------------------------------------------------------------------------------- # SoCSDRAM ---------------------------------------------------------------------------------
SoCSDRAM.__init__(self, platform, sys_clk_freq, SoCSDRAM.__init__(self, platform, sys_clk_freq,
cpu_type = cpu_type, cpu_type = cpu_type,
csr_alignment = csr_align, csr_alignment = csr_align,
max_sdram_size = 0x01000000, # Only expose 16MB to the CPU, enough for Init/Calib.
**kwargs) **kwargs)
# CRG -------------------------------------------------------------------------------------- # CRG --------------------------------------------------------------------------------------