gateware: rewrite mailbox to use bits_for.

This commit is contained in:
whitequark 2016-11-01 06:28:43 +00:00
parent 43cd970100
commit 636d4efe81

View File

@ -12,10 +12,10 @@ class Mailbox(Module):
values = Array([Signal(32) for _ in range(size)])
for i in self.i1, self.i2:
self.sync += [
i.dat_r.eq(values[i.adr & 0xff]),
i.dat_r.eq(values[i.adr[:bits_for(size-1)]]),
i.ack.eq(0),
If(i.cyc & i.stb & ~i.ack,
i.ack.eq(1),
If(i.we, values[i.adr & 0xff].eq(i.dat_w))
If(i.we, values[i.adr[:bits_for(size-1)]].eq(i.dat_w))
)
]