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soc_sdram: add l2_reverse parameter

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Florent Kermarrec 2020-01-31 19:16:54 +01:00
parent 6e5b47f4c6
commit eff9caee6a
1 changed files with 7 additions and 2 deletions
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9
litex/soc/integration/soc_sdram.py
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@ -27,12 +27,13 @@ class SoCSDRAM(SoCCore):
} }
csr_map.update(SoCCore.csr_map) csr_map.update(SoCCore.csr_map)
def __init__(self, platform, clk_freq, l2_size=8192, min_l2_data_width=128, max_sdram_size=None, **kwargs): def __init__(self, platform, clk_freq, l2_size=8192, l2_reverse=True, min_l2_data_width=128, max_sdram_size=None, **kwargs):
SoCCore.__init__(self, platform, clk_freq, **kwargs) SoCCore.__init__(self, platform, clk_freq, **kwargs)
if not self.integrated_main_ram_size: if not self.integrated_main_ram_size:
if self.cpu_type is not None and self.csr_data_width > 32: if self.cpu_type is not None and self.csr_data_width > 32:
raise NotImplementedError("BIOS supports SDRAM initialization only for csr_data_width<=32") raise NotImplementedError("BIOS supports SDRAM initialization only for csr_data_width<=32")
self.l2_size = l2_size self.l2_size = l2_size
self.l2_reverse = l2_reverse
self.min_l2_data_width = min_l2_data_width self.min_l2_data_width = min_l2_data_width
self.max_sdram_size = max_sdram_size self.max_sdram_size = max_sdram_size
@ -103,7 +104,11 @@ class SoCSDRAM(SoCCore):
# L2 Cache ----------------------------------------------------------------------------- # L2 Cache -----------------------------------------------------------------------------
l2_data_width = max(port.data_width, self.min_l2_data_width) l2_data_width = max(port.data_width, self.min_l2_data_width)
l2_cache = wishbone.Cache(l2_size//4, self._wb_sdram, wishbone.Interface(l2_data_width)) l2_cache = wishbone.Cache(
cachesize = l2_size//4,
master = self._wb_sdram,
slave = wishbone.Interface(l2_data_width),
reverse = self.l2_reverse)
# XXX Vivado ->2018.2 workaround, Vivado is not able to map correctly our L2 cache. # XXX Vivado ->2018.2 workaround, Vivado is not able to map correctly our L2 cache.
# Issue is reported to Xilinx, Remove this if ever fixed by Xilinx... # Issue is reported to Xilinx, Remove this if ever fixed by Xilinx...
from litex.build.xilinx.vivado import XilinxVivadoToolchain from litex.build.xilinx.vivado import XilinxVivadoToolchain