blob: 2c0eec70f6239de2690b5a07ea74cf450ed1efbf [file] [log] [blame]
#include "apic-defs.h"
.global online_cpus
ipi_vector = 0x20
max_cpus = MAX_TEST_CPUS
.bss
. = . + 4096 * max_cpus
.align 16
stacktop:
.data
.align 4096
pt:
i = 0
.rept 1024
.long 0x1e7 | (i << 22)
i = i + 1
.endr
.section .init
.code32
mb_magic = 0x1BADB002
mb_flags = 0x0
# multiboot header
.long mb_magic, mb_flags, 0 - (mb_magic + mb_flags)
mb_cmdline = 16
.macro setup_tr_and_percpu
lidt idt_descr
push %esp
call setup_tss
addl $4, %esp
ltr %ax
add $(max_cpus * 8), %ax
mov %ax, %gs
.endm
.macro setup_segments
mov $0x10, %ax
mov %ax, %ds
mov %ax, %es
mov %ax, %fs
mov %ax, %gs
mov %ax, %ss
.endm
.globl start
start:
lgdtl gdt_descr
setup_segments
mov $stacktop, %esp
push %ebx
call setup_multiboot
addl $4, %esp
call setup_libcflat
mov mb_cmdline(%ebx), %eax
mov %eax, __args
call __setup_args
call prepare_32
jmpl $8, $start32
prepare_32:
mov $(1 << 4), %eax // pse
mov %eax, %cr4
mov $pt, %eax
mov %eax, %cr3
mov %cr0, %eax
bts $0, %eax
bts $31, %eax
mov %eax, %cr0
ret
smp_stacktop: .long stacktop - 4096
save_id:
movl $(APIC_DEFAULT_PHYS_BASE + APIC_ID), %eax
movl (%eax), %eax
shrl $24, %eax
lock btsl %eax, online_cpus
retl
ap_start32:
setup_segments
mov $-4096, %esp
lock xaddl %esp, smp_stacktop
setup_tr_and_percpu
call prepare_32
call reset_apic
call save_id
call enable_apic
call enable_x2apic
sti
nop
lock incw cpu_online_count
1: hlt
jmp 1b
start32:
setup_tr_and_percpu
call reset_apic
call save_id
call mask_pic_interrupts
call enable_apic
call ap_init
call enable_x2apic
call smp_init
push $__environ
push $__argv
push __argc
call main
push %eax
call exit
ap_init:
cld
sgdtl ap_gdt_descr // must be close to sipi_entry for real mode access to work
lea sipi_entry, %esi
xor %edi, %edi
mov $(sipi_end - sipi_entry), %ecx
rep movsb
mov $APIC_DEFAULT_PHYS_BASE, %eax
movl $(APIC_DEST_ALLBUT | APIC_DEST_PHYSICAL | APIC_DM_INIT | APIC_INT_ASSERT), APIC_ICR(%eax)
movl $(APIC_DEST_ALLBUT | APIC_DEST_PHYSICAL | APIC_DM_STARTUP), APIC_ICR(%eax)
call fwcfg_get_nb_cpus
1: pause
cmpw %ax, cpu_online_count
jne 1b
ret
online_cpus:
.fill (max_cpus + 7) / 8, 1, 0
cpu_online_count: .word 1
.code16
sipi_entry:
mov %cr0, %eax
or $1, %eax
mov %eax, %cr0
lgdtl ap_gdt_descr - sipi_entry
ljmpl $8, $ap_start32
ap_gdt_descr:
.word 0
.long 0
sipi_end: