Function pmap_bootstrap

freebsd/mips/mips/pmap.c:490–597

}

void
pmap_bootstrap(void)
{
	int i;

	/* Sort. */
again:
	for (i = 0; phys_avail[i + 1] != 0; i += 2) {
		/*
		 * Keep the memory aligned on page boundary.
		 */
		phys_avail[i] = round_page(phys_avail[i]);
		phys_avail[i + 1] = trunc_page(phys_avail[i + 1]);

		if (i < 2)
			continue;
		if (phys_avail[i - 2] > phys_avail[i]) {
			vm_paddr_t ptemp[2];

			ptemp[0] = phys_avail[i + 0];
			ptemp[1] = phys_avail[i + 1];

			phys_avail[i + 0] = phys_avail[i - 2];
			phys_avail[i + 1] = phys_avail[i - 1];

			phys_avail[i - 2] = ptemp[0];
			phys_avail[i - 1] = ptemp[1];
			goto again;
		}
	}

       	/*
	 * In 32 bit, we may have memory which cannot be mapped directly.
	 * This memory will need temporary mapping before it can be
	 * accessed.
	 */
	if (!MIPS_DIRECT_MAPPABLE(phys_avail[i - 1] - 1))
		need_local_mappings = 1;

	/*
	 * Copy the phys_avail[] array before we start stealing memory from it.
	 */
	for (i = 0; phys_avail[i + 1] != 0; i += 2) {
		physmem_desc[i] = phys_avail[i];
		physmem_desc[i + 1] = phys_avail[i + 1];
	}

	Maxmem = atop(phys_avail[i - 1]);

	if (bootverbose) {
		printf("Physical memory chunk(s):\n");
		for (i = 0; phys_avail[i + 1] != 0; i += 2) {
			vm_paddr_t size;

			size = phys_avail[i + 1] - phys_avail[i];
			printf("%#08jx - %#08jx, %ju bytes (%ju pages)\n",
			    (uintmax_t) phys_avail[i],
			    (uintmax_t) phys_avail[i + 1] - 1,