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minix/kernel/arch/i386/apic_asm.S
Tomas Hruby 62c666566e SMP - We boot APs 
- kernel detects CPUs by searching ACPI tables for local apic nodes

- each CPU has its own TSS that points to its own stack. All cpus boot
  on the same boot stack (in sequence) but switch to its private stack
  as soon as they can.

- final booting code in main() placed in bsp_finish_booting() which is
  executed only after the BSP switches to its final stack

- apic functions to send startup interrupts

- assembler functions to handle CPU features not needed for single cpu
  mode like memory barries, HT detection etc.

- new files kernel/smp.[ch], kernel/arch/i386/arch_smp.c and
  kernel/arch/i386/include/arch_smp.h

- 16-bit trampoline code for the APs. It is executed by each AP after
  receiving startup IPIs it brings up the CPUs to 32bit mode and let
  them spin in an infinite loop so they don't do any damage.

- implementation of kernel spinlock

- CONFIG_SMP and CONFIG_MAX_CPUS set by the build system
2010-09-15 14:09:52 +00:00

441 lines
11 KiB
ArmAsm
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#include "archconst.h"
#include "apic.h"
#include "sconst.h"
#include "apic_asm.h"
#include <machine/asm.h>
#define APIC_IRQ_HANDLER(irq) \
push $irq ;\
call _C_LABEL(irq_handle) /* intr_handle(irq) */ ;\
add $4, %esp ;
/*===========================================================================*/
/* interrupt handlers */
/* interrupt handlers for 386 32-bit protected mode */
/* APIC interrupt handlers for 386 32-bit protected mode */
/*===========================================================================*/
#define apic_hwint(irq) \
ENTRY(apic_hwint##irq) \
TEST_INT_IN_KERNEL(4, 0f) ;\
\
SAVE_PROCESS_CTX(0) ;\
push %ebp ;\
call _C_LABEL(context_stop) ;\
add $4, %esp ;\
movl $0, %ebp /* for stack trace */ ;\
APIC_IRQ_HANDLER(irq) ;\
jmp _C_LABEL(switch_to_user) ;\
\
0: \
pusha ;\
call _C_LABEL(context_stop_idle) ;\
APIC_IRQ_HANDLER(irq) ;\
CLEAR_IF(10*4(%esp)) ;\
popa ;\
iret ;
#define LAPIC_INTR_HANDLER(func) \
movl $func, %eax ;\
call *%eax /* call the actual handler */ ;\
mov _C_LABEL(lapic_eoi_addr), %eax /* the end of handler*/ ;\
movl $0, (%eax) ;
/*===========================================================================*/
/* handler of the local APIC interrupts */
/*===========================================================================*/
#define lapic_intr(func) \
TEST_INT_IN_KERNEL(4, 0f) ;\
\
SAVE_PROCESS_CTX(0) ;\
push %ebp ;\
call _C_LABEL(context_stop) ;\
add $4, %esp ;\
movl $0, %ebp /* for stack trace */ ;\
LAPIC_INTR_HANDLER(func) ;\
jmp _C_LABEL(switch_to_user) ;\
\
0: \
pusha ;\
call _C_LABEL(context_stop_idle) ;\
LAPIC_INTR_HANDLER(func) ;\
CLEAR_IF(10*4(%esp)) ;\
popa ;\
iret ;
/* apic timer tick handlers */
ENTRY(lapic_bsp_timer_int_handler)
lapic_intr(_C_LABEL(bsp_timer_int_handler))
ENTRY(lapic_ap_timer_int_handler)
lapic_intr(_C_LABEL(ap_timer_int_handler))
#ifdef CONFIG_SMP
#include "arch_smp.h"
/* FIXME dummy stubs */
ENTRY(smp_ipi_sched)
1: jmp 1b
ENTRY(smp_ipi_dequeue)
1: jmp 1b
ENTRY(smp_ipi_stop)
1: jmp 1b
ENTRY(smp_ipi_reboot)
1: jmp 1b
ENTRY(smp_ipi_err_int)
1: jmp 1b
ENTRY(smp_ipi_spv_int)
1: jmp 1b
#endif /* CONFIG_SMP */
#ifdef CONFIG_APIC_DEBUG
.data
lapic_intr_dummy_handler_msg:
.ascii "UNHANDLED APIC interrupt vector %d\n"
.text
#define lapic_intr_dummy_handler(vect) \
pushl $vect; \
push $lapic_intr_dummy_handler_msg; \
call _C_LABEL(printf); \
1: jmp 1b; /* never return */
#define LAPIC_INTR_DUMMY_HANDLER(vect) \
.balign LAPIC_INTR_DUMMY_HANDLER_SIZE; \
_lapic_intr_dummy_handler_##vect: lapic_intr_dummy_handler(vect)
apic_hwint(0)
apic_hwint(1)
apic_hwint(2)
apic_hwint(3)
apic_hwint(4)
apic_hwint(5)
apic_hwint(6)
apic_hwint(7)
apic_hwint(8)
apic_hwint(9)
apic_hwint(10)
apic_hwint(11)
apic_hwint(12)
apic_hwint(13)
apic_hwint(14)
apic_hwint(15)
apic_hwint(16)
apic_hwint(17)
apic_hwint(18)
apic_hwint(19)
apic_hwint(20)
apic_hwint(21)
apic_hwint(22)
apic_hwint(23)
apic_hwint(24)
apic_hwint(25)
apic_hwint(26)
apic_hwint(27)
apic_hwint(28)
apic_hwint(29)
apic_hwint(30)
apic_hwint(31)
apic_hwint(32)
apic_hwint(33)
apic_hwint(34)
apic_hwint(35)
apic_hwint(36)
apic_hwint(37)
apic_hwint(38)
apic_hwint(39)
apic_hwint(40)
apic_hwint(41)
apic_hwint(42)
apic_hwint(43)
apic_hwint(44)
apic_hwint(45)
apic_hwint(46)
apic_hwint(47)
apic_hwint(48)
apic_hwint(49)
apic_hwint(50)
apic_hwint(51)
apic_hwint(52)
apic_hwint(53)
apic_hwint(54)
apic_hwint(55)
apic_hwint(56)
apic_hwint(57)
apic_hwint(58)
apic_hwint(59)
apic_hwint(60)
apic_hwint(61)
apic_hwint(62)
apic_hwint(63)
LABEL(lapic_intr_dummy_handles_start)
LAPIC_INTR_DUMMY_HANDLER(0)
LAPIC_INTR_DUMMY_HANDLER(1)
LAPIC_INTR_DUMMY_HANDLER(2)
LAPIC_INTR_DUMMY_HANDLER(3)
LAPIC_INTR_DUMMY_HANDLER(4)
LAPIC_INTR_DUMMY_HANDLER(5)
LAPIC_INTR_DUMMY_HANDLER(6)
LAPIC_INTR_DUMMY_HANDLER(7)
LAPIC_INTR_DUMMY_HANDLER(8)
LAPIC_INTR_DUMMY_HANDLER(9)
LAPIC_INTR_DUMMY_HANDLER(10)
LAPIC_INTR_DUMMY_HANDLER(11)
LAPIC_INTR_DUMMY_HANDLER(12)
LAPIC_INTR_DUMMY_HANDLER(13)
LAPIC_INTR_DUMMY_HANDLER(14)
LAPIC_INTR_DUMMY_HANDLER(15)
LAPIC_INTR_DUMMY_HANDLER(16)
LAPIC_INTR_DUMMY_HANDLER(17)
LAPIC_INTR_DUMMY_HANDLER(18)
LAPIC_INTR_DUMMY_HANDLER(19)
LAPIC_INTR_DUMMY_HANDLER(20)
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LAPIC_INTR_DUMMY_HANDLER(45)
LAPIC_INTR_DUMMY_HANDLER(46)
LAPIC_INTR_DUMMY_HANDLER(47)
LAPIC_INTR_DUMMY_HANDLER(48)
LAPIC_INTR_DUMMY_HANDLER(49)
LAPIC_INTR_DUMMY_HANDLER(50)
LAPIC_INTR_DUMMY_HANDLER(51)
LAPIC_INTR_DUMMY_HANDLER(52)
LAPIC_INTR_DUMMY_HANDLER(53)
LAPIC_INTR_DUMMY_HANDLER(54)
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LABEL(lapic_intr_dummy_handles_end)
#endif /* CONFIG_APIC_DEBUG */
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