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Kernel: Fix ACPI _GPE calling 

This adds patch adds support for extended GPEs and the second GPE
register block.
This commit is contained in:
Bananymous 2025-08-07 19:27:05 +03:00
parent de7c3d3d29
commit 3aa20a3a32
1 changed files with 60 additions and 23 deletions
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85
kernel/kernel/ACPI/ACPI.cpp
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@ -927,42 +927,79 @@ acpi_release_global_lock:
return 0;
};
#define FIND_GPE(idx) \
BAN::Optional<GAS> gpe##idx; \
{ \
const uint8_t null[sizeof(GAS)] {}; \
if (fadt().length > offsetof(FADT, x_gpe##idx##_blk) \
&& memcmp(fadt().x_gpe##idx##_blk, null, sizeof(GAS)) == 0) { \
auto gas = *reinterpret_cast<GAS*>(fadt().x_gpe##idx##_blk); \
if (!gas.read().is_error()) \
gpe0 = gas; \
} \
\
if (!gpe##idx.has_value() && fadt().gpe##idx##_blk) { \
gpe##idx = GAS { \
.address_space_id = GAS::AddressSpaceID::SystemIO, \
.register_bit_width = 8, \
.register_bit_offset = 0, \
.access_size = 1, \
.address = fadt().gpe##idx##_blk, \
}; \
} \
}
FIND_GPE(0);
FIND_GPE(1);
while (true)
{
uint16_t sts_port;
uint16_t pending;
sts_port = fadt().pm1a_evt_blk;
if (pending = get_fixed_event(sts_port); pending)
goto handle_event;
sts_port = fadt().pm1b_evt_blk;
if (pending = get_fixed_event(sts_port); pending)
goto handle_event;
const auto read_gpe = [this](GAS gpe, uint8_t gpe_blk_len, uint32_t base) -> bool {
for (uint8_t i = 0; i < gpe_blk_len / 2; i++)
{
bool handled_event = false;
uint8_t gpe0_bytes = fadt().gpe0_blk_len / 2;
for (uint8_t i = 0; i < gpe0_bytes; i++)
{
uint8_t sts = IO::inb(fadt().gpe0_blk + i);
uint8_t en = IO::inb(fadt().gpe0_blk + gpe0_bytes + i);
pending = sts & en;
auto status = ({ auto tmp = gpe; tmp.address += i; tmp; });
auto enabled = ({ auto tmp = gpe; tmp.address += (gpe_blk_len / 2) + i; tmp; });
const uint8_t pending = MUST(status.read()) & MUST(enabled.read());
if (pending == 0)
continue;
auto index = i * 8 + (pending & ~(pending - 1));
if (m_gpe_methods[index])
if (auto ret = AML::method_call(m_gpe_scope, m_gpe_methods[index]->node, BAN::Array<AML::Reference*, 7>{}); ret.is_error())
dwarnln("Failed to evaluate _GPE {}: ", index, ret.error());
handled_event = true;
IO::outb(fadt().gpe0_blk + i, 1 << index);
}
if (handled_event)
for (size_t bit = 0; bit < 8; bit++)
{
if (!(pending & (1 << bit)))
continue;
const auto index = base + i * 8 + bit;
if (auto* method = m_gpe_methods[index]; method == nullptr)
dwarnln("No handler for _GPE {}", index);
else if (auto ret = AML::method_call(m_gpe_scope, method->node, BAN::Array<AML::Reference*, 7>{}); ret.is_error())
dwarnln("Failed to evaluate _GPE {}: ", index, ret.error());
else
dprintln("handled _GPE {}", index);
}
MUST(status.write(pending));
return true;
}
return false;
};
sts_port = fadt().pm1a_evt_blk;
if ((pending = get_fixed_event(sts_port)))
goto handle_event;
sts_port = fadt().pm1b_evt_blk;
if ((pending = get_fixed_event(sts_port)))
goto handle_event;
if (gpe0.has_value() && read_gpe(gpe0.value(), fadt().gpe0_blk_len, 0))
continue;
if (gpe1.has_value() && read_gpe(gpe1.value(), fadt().gpe1_blk_len, fadt().gpe1_base))
continue;
// FIXME: this can cause missing of event if it happens between
// reading the status and blocking