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Compare Revisions

• This comparison shows the changes necessary to convert path

  → /kernel/trunk/arch/amd64/src/proc/scheduler.c @ 1200

  → /kernel/trunk/arch/amd64/src/proc/scheduler.c @ 1201

  ↔ Reverse comparison

• Compare Path:	Rev

  With Path:	Rev

Ignore whitespace Rev 1200 → Rev 1201

/kernel/trunk/arch/amd64/src/proc/scheduler.c
36,6 → 36,7
#include <arch/debugger.h>
#include <print.h>
#include <arch/pm.h>
#include <adt/bitmap.h>
/** Perform amd64 specific tasks needed before the new task is run.
*
43,7 → 44,7
*/
void before_task_runs_arch(void)
{
size_t iomap_size;
count_t bits;
ptr_16_64_t cpugdtr;
descriptor_t *gdt_p;
53,11 → 54,17
/* First, copy the I/O Permission Bitmap. */
spinlock_lock(&TASK->lock);
iomap_size = TASK->arch.iomap_size;
if (iomap_size) {
ASSERT(TASK->arch.iomap);
memcpy(CPU->arch.tss->iomap, TASK->arch.iomap, iomap_size);
CPU->arch.tss->iomap[iomap_size] = 0xff; /* terminating byte */
if ((bits = TASK->arch.iomap.bits)) {
bitmap_t iomap;
ASSERT(TASK->arch.iomap.map);
bitmap_initialize(&iomap, CPU->arch.tss->iomap, TSS_IOMAP_SIZE * 8);
bitmap_copy(&iomap, &TASK->arch.iomap, TASK->arch.iomap.bits);
/*
* It is safe to set the trailing four bits because of the extra
* convenience byte in TSS_IOMAP_SIZE.
*/
bitmap_set_range(&iomap, TASK->arch.iomap.bits, 4);
}
spinlock_unlock(&TASK->lock);
64,7 → 71,7
/* Second, adjust TSS segment limit. */
gdtr_store(&cpugdtr);
gdt_p = (descriptor_t *) cpugdtr.base;
gdt_tss_setlimit(&gdt_p[TSS_DES], TSS_BASIC_SIZE + iomap_size - 1);
gdt_tss_setlimit(&gdt_p[TSS_DES], TSS_BASIC_SIZE + BITS2BYTES(bits) - 1);
gdtr_load(&cpugdtr);
}