IDT is initialized in idt_init() not in prot_init()
This is a backport form the SMP branch. Not required here, it only makes life for SMP easier. And future merging too. - filling the IDT is removed from prot_init() - struct gate_table_s is a public type - gate_table_pic is a global array as it is used by APIC code too - idt_copy_vectors() is also global and used by idt_init() as well as apic_idt_init() - idt_init() is called right after prot_init() in system_init()
This commit is contained in:
Tomas Hruby
parent
1162806940
commit
4903a734b8
@ -134,41 +134,7 @@ PUBLIC void init_codeseg(register struct segdesc_s *segdp, phys_bytes base,
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/* CONFORMING = 0, ACCESSED = 0 */
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}
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/*===========================================================================*
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* prot_init *
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*===========================================================================*/
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PUBLIC void prot_init(void)
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{
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/* Set up tables for protected mode.
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* All GDT slots are allocated at compile time.
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*/
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struct gate_table_s *gtp;
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struct desctableptr_s *dtp;
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unsigned ldt_index;
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register struct proc *rp;
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static struct gate_table_s {
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_PROTOTYPE( void (*gate), (void) );
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unsigned char vec_nr;
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unsigned char privilege;
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}
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gate_table[] = {
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{ divide_error, DIVIDE_VECTOR, INTR_PRIVILEGE },
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{ single_step_exception, DEBUG_VECTOR, INTR_PRIVILEGE },
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{ nmi, NMI_VECTOR, INTR_PRIVILEGE },
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{ breakpoint_exception, BREAKPOINT_VECTOR, USER_PRIVILEGE },
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{ overflow, OVERFLOW_VECTOR, USER_PRIVILEGE },
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{ bounds_check, BOUNDS_VECTOR, INTR_PRIVILEGE },
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{ inval_opcode, INVAL_OP_VECTOR, INTR_PRIVILEGE },
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{ copr_not_available, COPROC_NOT_VECTOR, INTR_PRIVILEGE },
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{ double_fault, DOUBLE_FAULT_VECTOR, INTR_PRIVILEGE },
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{ copr_seg_overrun, COPROC_SEG_VECTOR, INTR_PRIVILEGE },
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{ inval_tss, INVAL_TSS_VECTOR, INTR_PRIVILEGE },
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{ segment_not_present, SEG_NOT_VECTOR, INTR_PRIVILEGE },
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{ stack_exception, STACK_FAULT_VECTOR, INTR_PRIVILEGE },
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{ general_protection, PROTECTION_VECTOR, INTR_PRIVILEGE },
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{ page_fault, PAGE_FAULT_VECTOR, INTR_PRIVILEGE },
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{ copr_error, COPROC_ERR_VECTOR, INTR_PRIVILEGE },
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PUBLIC struct gate_table_s gate_table_pic[] = {
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{ hwint00, VECTOR( 0), INTR_PRIVILEGE },
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{ hwint01, VECTOR( 1), INTR_PRIVILEGE },
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{ hwint02, VECTOR( 2), INTR_PRIVILEGE },
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@ -185,10 +151,22 @@ PUBLIC void prot_init(void)
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{ hwint13, VECTOR(13), INTR_PRIVILEGE },
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{ hwint14, VECTOR(14), INTR_PRIVILEGE },
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{ hwint15, VECTOR(15), INTR_PRIVILEGE },
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{ s_call, SYS386_VECTOR, USER_PRIVILEGE }, /* 386 system call */
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{ level0_call, LEVEL0_VECTOR, TASK_PRIVILEGE },
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{ NULL, 0, 0}
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};
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/*===========================================================================*
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* prot_init *
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*===========================================================================*/
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PUBLIC void prot_init(void)
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{
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/* Set up tables for protected mode.
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* All GDT slots are allocated at compile time.
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*/
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struct gate_table_s *gtp;
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struct desctableptr_s *dtp;
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unsigned ldt_index;
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register struct proc *rp;
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/* Build gdt and idt pointers in GDT where the BIOS expects them. */
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dtp= (struct desctableptr_s *) &gdt[GDT_INDEX];
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* (u16_t *) dtp->limit = (sizeof gdt) - 1;
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@ -232,17 +210,48 @@ PUBLIC void prot_init(void)
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init_dataseg(&gdt[TSS_INDEX], vir2phys(&tss), sizeof(tss), INTR_PRIVILEGE);
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gdt[TSS_INDEX].access = PRESENT | (INTR_PRIVILEGE << DPL_SHIFT) | TSS_TYPE;
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/* Build descriptors for interrupt gates in IDT. */
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for (gtp = &gate_table[0];
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gtp < &gate_table[sizeof gate_table / sizeof gate_table[0]]; ++gtp) {
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int_gate(gtp->vec_nr, (vir_bytes) gtp->gate,
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PRESENT | INT_GATE_TYPE | (gtp->privilege << DPL_SHIFT));
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}
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/* Complete building of main TSS. */
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tss.iobase = sizeof tss; /* empty i/o permissions map */
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}
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PUBLIC void idt_copy_vectors(struct gate_table_s * first)
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{
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struct gate_table_s *gtp;
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for (gtp = first; gtp->gate; gtp++) {
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int_gate(gtp->vec_nr, (vir_bytes) gtp->gate,
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PRESENT | INT_GATE_TYPE |
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(gtp->privilege << DPL_SHIFT));
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}
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}
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/* Build descriptors for interrupt gates in IDT. */
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PUBLIC void idt_init(void)
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{
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struct gate_table_s gate_table[] = {
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{ divide_error, DIVIDE_VECTOR, INTR_PRIVILEGE },
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{ single_step_exception, DEBUG_VECTOR, INTR_PRIVILEGE },
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{ nmi, NMI_VECTOR, INTR_PRIVILEGE },
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{ breakpoint_exception, BREAKPOINT_VECTOR, USER_PRIVILEGE },
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{ overflow, OVERFLOW_VECTOR, USER_PRIVILEGE },
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{ bounds_check, BOUNDS_VECTOR, INTR_PRIVILEGE },
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{ inval_opcode, INVAL_OP_VECTOR, INTR_PRIVILEGE },
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{ copr_not_available, COPROC_NOT_VECTOR, INTR_PRIVILEGE },
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{ double_fault, DOUBLE_FAULT_VECTOR, INTR_PRIVILEGE },
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{ copr_seg_overrun, COPROC_SEG_VECTOR, INTR_PRIVILEGE },
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{ inval_tss, INVAL_TSS_VECTOR, INTR_PRIVILEGE },
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{ segment_not_present, SEG_NOT_VECTOR, INTR_PRIVILEGE },
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{ stack_exception, STACK_FAULT_VECTOR, INTR_PRIVILEGE },
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{ general_protection, PROTECTION_VECTOR, INTR_PRIVILEGE },
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{ page_fault, PAGE_FAULT_VECTOR, INTR_PRIVILEGE },
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{ copr_error, COPROC_ERR_VECTOR, INTR_PRIVILEGE },
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{ s_call, SYS386_VECTOR, USER_PRIVILEGE },/* 386 system call */
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{ level0_call, LEVEL0_VECTOR, TASK_PRIVILEGE },
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{ NULL, 0, 0}
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};
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idt_copy_vectors(gate_table);
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idt_copy_vectors(gate_table_pic);
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}
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/*===========================================================================*
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@ -80,6 +80,18 @@ _PROTOTYPE( void init_dataseg, (struct segdesc_s *segdp, phys_bytes base,
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vir_bytes size, int privilege) );
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_PROTOTYPE( void enable_iop, (struct proc *pp) );
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/* prototype of an interrupt vector table entry */
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struct gate_table_s {
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_PROTOTYPE( void (*gate), (void) );
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unsigned char vec_nr;
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unsigned char privilege;
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};
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EXTERN struct gate_table_s gate_table_pic[];
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/* copies an array of vectors to the IDT. The last vector must be zero filled */
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_PROTOTYPE(void idt_copy_vectors, (struct gate_table_s * first));
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/* functions defined in architecture-independent kernel source. */
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#include "../../proto.h"
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@ -94,6 +94,7 @@ PUBLIC void arch_get_aout_headers(int i, struct exec *h)
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PUBLIC void system_init(void)
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{
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prot_init();
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idt_init();
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#if 0
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/* Set CR0_EM until we get FP context switching */
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