diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/x86/lapic/lapic.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/src/cpu/x86/lapic/lapic.c b/src/cpu/x86/lapic/lapic.c index 653c3b2e40..f0a6cd7f46 100644 --- a/src/cpu/x86/lapic/lapic.c +++ b/src/cpu/x86/lapic/lapic.c @@ -2,11 +2,16 @@ #include <cpu/x86/lapic.h> #include <console/console.h> -#include <smp/node.h> void do_lapic_init(void) { - uint32_t lvt0_val; + /* this is so interrupts work. This is very limited scope -- + * linux will do better later, we hope ... + */ + /* this is the first way we learned to do it. It fails on real SMP + * stuff. So we have to do things differently ... + * see the Intel mp1.4 spec, page A-3 + */ printk(BIOS_INFO, "Setting up local APIC...\n"); @@ -23,16 +28,15 @@ void do_lapic_init(void) lapic_write_around(LAPIC_SPIV, (lapic_read_around(LAPIC_SPIV) & ~(LAPIC_VECTOR_MASK)) | LAPIC_SPIV_ENABLE); - - lvt0_val = (lapic_read_around(LAPIC_LVT0) & - ~(LAPIC_LVT_MASKED | LAPIC_LVT_LEVEL_TRIGGER | + lapic_write_around(LAPIC_LVT0, + (lapic_read_around(LAPIC_LVT0) & + ~(LAPIC_LVT_MASKED | LAPIC_LVT_LEVEL_TRIGGER | LAPIC_LVT_REMOTE_IRR | LAPIC_INPUT_POLARITY | - LAPIC_SEND_PENDING | LAPIC_LVT_RESERVED_1)) | - (LAPIC_LVT_REMOTE_IRR | LAPIC_SEND_PENDING); - if (boot_cpu()) - lvt0_val = SET_LAPIC_DELIVERY_MODE(lvt0_val, LAPIC_MODE_EXINT); - lapic_write_around(LAPIC_LVT0, lvt0_val); - + LAPIC_SEND_PENDING | LAPIC_LVT_RESERVED_1 | + LAPIC_DELIVERY_MODE_MASK)) + | (LAPIC_LVT_REMOTE_IRR | LAPIC_SEND_PENDING | + LAPIC_DELIVERY_MODE_EXTINT) + ); lapic_write_around(LAPIC_LVT1, (lapic_read_around(LAPIC_LVT1) & ~(LAPIC_LVT_MASKED | LAPIC_LVT_LEVEL_TRIGGER | |