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/soc/intel/common | |
| 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/soc/intel/common')
| -rw-r--r-- | src/soc/intel/common/block/lpc/lpc_lib.c | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/src/soc/intel/common/block/lpc/lpc_lib.c b/src/soc/intel/common/block/lpc/lpc_lib.c index 0268245f34..c2278df248 100644 --- a/src/soc/intel/common/block/lpc/lpc_lib.c +++ b/src/soc/intel/common/block/lpc/lpc_lib.c @@ -274,22 +274,16 @@ void lpc_disable_clkrun(void) pci_write_config8(PCH_DEV_LPC, LPC_PCCTL, pcctl & ~LPC_PCCTL_CLKRUN_EN); } +/* PCH I/O APIC redirection entries */ +#define PCH_REDIR_ETR 120 + /* Enable PCH IOAPIC */ void pch_enable_ioapic(void) { - uint32_t reg32; - /* PCH-LP has 120 redirection entries */ - const int redir_entries = 120; - set_ioapic_id((void *)IO_APIC_ADDR, 0x02); /* affirm full set of redirection table entries ("write once") */ - reg32 = io_apic_read((void *)IO_APIC_ADDR, 0x01); - - reg32 &= ~0x00ff0000; - reg32 |= (redir_entries - 1) << 16; - - io_apic_write((void *)IO_APIC_ADDR, 0x01, reg32); + ioapic_set_max_vectors(VIO_APIC_VADDR, PCH_REDIR_ETR); } static const uint8_t pch_interrupt_routing[PIRQ_COUNT] = { |