static void flush_tlb_one()

in mm/tlb.c [124:157]

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

static void flush_tlb_one(unsigned long addr)
{
	unsigned int way;
	unsigned long org_misc, pid_misc;

	pr_debug("Flush tlb-entry for vaddr=%#lx\n", addr);

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

	WRCTL(CTL_PTEADDR, (addr >> PAGE_SHIFT) << 2);

	for (way = 0; way < cpuinfo.tlb_num_ways; way++) {
		unsigned long pteaddr;
		unsigned long tlbmisc;

		tlbmisc = TLBMISC_RD | (way << TLBMISC_WAY_SHIFT);
		WRCTL(CTL_TLBMISC, tlbmisc);

		pteaddr = RDCTL(CTL_PTEADDR);
		if (((pteaddr >> 2) & 0xfffff) != (addr >> PAGE_SHIFT))
			continue;

		pr_debug("Flush entry by writing way=%dl pid=%ld\n",
			 way, (pid_misc >> TLBMISC_PID_SHIFT));

		tlbmisc = TLBMISC_WE | (way << TLBMISC_WAY_SHIFT);
		WRCTL(CTL_TLBMISC, tlbmisc);
		WRCTL(CTL_PTEADDR, pteaddr_invalid(addr));
		WRCTL(CTL_TLBACC, 0);
	}

	WRCTL(CTL_TLBMISC, org_misc);
}