diff options
Diffstat (limited to 'src/soc/intel/common/block/lpc/lpc_lib.c')
| -rw-r--r-- | src/soc/intel/common/block/lpc/lpc_lib.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/lpc/lpc_lib.c b/src/soc/intel/common/block/lpc/lpc_lib.c index ff44cc1a67..87ee11056e 100644 --- a/src/soc/intel/common/block/lpc/lpc_lib.c +++ b/src/soc/intel/common/block/lpc/lpc_lib.c @@ -2,6 +2,7 @@ #define __SIMPLE_DEVICE__ +#include <arch/ioapic.h> #include <assert.h> #include <console/console.h> #include <device/pci.h> @@ -292,3 +293,27 @@ void lpc_disable_clkrun(void) const uint8_t pcctl = pci_read_config8(PCH_DEV_LPC, LPC_PCCTL); pci_write_config8(PCH_DEV_LPC, LPC_PCCTL, pcctl & ~LPC_PCCTL_CLKRUN_EN); } + +/* 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); + + /* + * Select Boot Configuration register (0x03) and + * use Processor System Bus (0x01) to deliver interrupts. + */ + io_apic_write((void *)IO_APIC_ADDR, 0x03, 0x01); +} |