static void __init m68k_parse_bootinfo()

in kernel/setup_mm.c [142:223]

• 73 lines of code
• 21 McCabe index (conditional complexity)

static void __init m68k_parse_bootinfo(const struct bi_record *record)
{
	uint16_t tag;

	save_bootinfo(record);

	while ((tag = be16_to_cpu(record->tag)) != BI_LAST) {
		int unknown = 0;
		const void *data = record->data;
		uint16_t size = be16_to_cpu(record->size);

		switch (tag) {
		case BI_MACHTYPE:
		case BI_CPUTYPE:
		case BI_FPUTYPE:
		case BI_MMUTYPE:
			/* Already set up by head.S */
			break;

		case BI_MEMCHUNK:
			if (m68k_num_memory < NUM_MEMINFO) {
				const struct mem_info *m = data;
				m68k_memory[m68k_num_memory].addr =
					be32_to_cpu(m->addr);
				m68k_memory[m68k_num_memory].size =
					be32_to_cpu(m->size);
				m68k_num_memory++;
			} else
				pr_warn("%s: too many memory chunks\n",
					__func__);
			break;

		case BI_RAMDISK:
			{
				const struct mem_info *m = data;
				m68k_ramdisk.addr = be32_to_cpu(m->addr);
				m68k_ramdisk.size = be32_to_cpu(m->size);
			}
			break;

		case BI_COMMAND_LINE:
			strlcpy(m68k_command_line, data,
				sizeof(m68k_command_line));
			break;

		default:
			if (MACH_IS_AMIGA)
				unknown = amiga_parse_bootinfo(record);
			else if (MACH_IS_ATARI)
				unknown = atari_parse_bootinfo(record);
			else if (MACH_IS_MAC)
				unknown = mac_parse_bootinfo(record);
			else if (MACH_IS_Q40)
				unknown = q40_parse_bootinfo(record);
			else if (MACH_IS_BVME6000)
				unknown = bvme6000_parse_bootinfo(record);
			else if (MACH_IS_MVME16x)
				unknown = mvme16x_parse_bootinfo(record);
			else if (MACH_IS_MVME147)
				unknown = mvme147_parse_bootinfo(record);
			else if (MACH_IS_HP300)
				unknown = hp300_parse_bootinfo(record);
			else if (MACH_IS_APOLLO)
				unknown = apollo_parse_bootinfo(record);
			else
				unknown = 1;
		}
		if (unknown)
			pr_warn("%s: unknown tag 0x%04x ignored\n", __func__,
				tag);
		record = (struct bi_record *)((unsigned long)record + size);
	}

	m68k_realnum_memory = m68k_num_memory;
#ifdef CONFIG_SINGLE_MEMORY_CHUNK
	if (m68k_num_memory > 1) {
		pr_warn("%s: ignoring last %i chunks of physical memory\n",
			__func__, (m68k_num_memory - 1));
		m68k_num_memory = 1;
	}
#endif
}