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mc88200: invalidate colliding block address translation cache entries

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This commit is contained in:
Patrick Mackinlay 2023-03-24 14:08:42 +07:00
parent 2a6879c6a4
commit 564fa462ba
1 changed files with 12 additions and 0 deletions
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12
src/devices/machine/mc88200.cpp
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@ -374,6 +374,18 @@ void mc88200_device::bwp_w(offs_t offset, u32 data)
{
LOG("bwp_w %x,0x%08x (%s)\n", offset, data, machine().describe_context());
if (data & BATC_V)
{
for (unsigned i = 0; i < std::size(m_batc); i++)
{
if ((i != offset) && (m_batc[i] & BATC_V) && BIT(m_batc[i], 19, 13) == BIT(data, 19, 13))
{
logerror("duplicate batc entry 0x%08x invalidated (%s)\n", data, machine().describe_context());
data &= ~BATC_V;
}
}
}
m_batc[offset] = data;
}