void flush_tlb_all()

in mm/tlb.c [265:290]

• 16 lines of code
• 3 McCabe index (conditional complexity)

void flush_tlb_all(void)
{
	unsigned long addr = 0;
	unsigned int line;
	unsigned int way;
	unsigned long org_misc, pid_misc;

	/* remember pid/way until we return */
	get_misc_and_pid(&org_misc, &pid_misc);

	/* Start at way 0, way is auto-incremented after each TLBACC write */
	WRCTL(CTL_TLBMISC, TLBMISC_WE);

	/* Map each TLB entry to physcal address 0 with no-access and a
	   bad ptbase */
	for (line = 0; line < cpuinfo.tlb_num_lines; line++) {
		WRCTL(CTL_PTEADDR, pteaddr_invalid(addr));
		for (way = 0; way < cpuinfo.tlb_num_ways; way++)
			WRCTL(CTL_TLBACC, 0);

		addr += PAGE_SIZE;
	}

	/* restore pid/way */
	WRCTL(CTL_TLBMISC, org_misc);
}