diff options
| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2021-06-06 08:04:28 +0300 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2021-10-22 14:13:42 +0000 |
| commit | 04a40379b0cbc96c25498ec69520cb7cd85f3fe4 (patch) | |
| tree | 49ca87768e1eba294f244ea84158a32992056065 /src/southbridge/intel/lynxpoint | |
| parent | e8601f47772c9a71486e15e19c2cdd2947034b49 (diff) | |
sb,soc/intel: Set IOAPIC redirection entry count
The number of redirection table entries (aka interrupt vectors) inside
an I/O APIC may depend of the SKU, with the related register being of
type read/write-once. Provide support utilities to either lock or set
this registers value.
Change-Id: I8da869ba390dd821b43032e4ccbc9291c39e6bab
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55289
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'src/southbridge/intel/lynxpoint')
| -rw-r--r-- | src/southbridge/intel/lynxpoint/lpc.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/src/southbridge/intel/lynxpoint/lpc.c b/src/southbridge/intel/lynxpoint/lpc.c index d0eb4b33f0..ef75d2f77d 100644 --- a/src/southbridge/intel/lynxpoint/lpc.c +++ b/src/southbridge/intel/lynxpoint/lpc.c @@ -31,8 +31,6 @@ */ static void pch_enable_ioapic(struct device *dev) { - u32 reg32; - /* Assign unique bus/dev/fn for I/O APIC */ pci_write_config16(dev, LPC_IBDF, PCH_IOAPIC_PCI_BUS << 8 | PCH_IOAPIC_PCI_SLOT << 3); @@ -40,13 +38,11 @@ static void pch_enable_ioapic(struct device *dev) set_ioapic_id(VIO_APIC_VADDR, 0x02); /* affirm full set of redirection table entries ("write once") */ - reg32 = io_apic_read(VIO_APIC_VADDR, 0x01); - if (pch_is_lp()) { - /* PCH-LP has 39 redirection entries */ - reg32 &= ~0x00ff0000; - reg32 |= 0x00270000; - } - io_apic_write(VIO_APIC_VADDR, 0x01, reg32); + /* PCH-LP has 40 redirection entries */ + if (pch_is_lp()) + ioapic_set_max_vectors(VIO_APIC_VADDR, 40); + else + ioapic_lock_max_vectors(VIO_APIC_VADDR); } static void pch_enable_serial_irqs(struct device *dev) |