void __init config_amiga()

in amiga/config.c [371:453]

• 57 lines of code
• 13 McCabe index (conditional complexity)

void __init config_amiga(void)
{
	int i;

	amiga_identify();

	/* Yuk, we don't have PCI memory */
	iomem_resource.name = "Memory";
	for (i = 0; i < 4; i++)
		request_resource(&iomem_resource, &((struct resource *)&mb_resources)[i]);

	mach_sched_init      = amiga_sched_init;
	mach_init_IRQ        = amiga_init_IRQ;
	mach_get_model       = amiga_get_model;
	mach_get_hardware_list = amiga_get_hardware_list;
	mach_reset           = amiga_reset;
#if IS_ENABLED(CONFIG_INPUT_M68K_BEEP)
	mach_beep            = amiga_mksound;
#endif

#ifdef CONFIG_HEARTBEAT
	mach_heartbeat = amiga_heartbeat;
#endif

	mach_random_get_entropy = amiga_random_get_entropy;

	/* Fill in the clock value (based on the 700 kHz E-Clock) */
	amiga_colorclock = 5*amiga_eclock;	/* 3.5 MHz */

	/* clear all DMA bits */
	amiga_custom.dmacon = DMAF_ALL;
	/* ensure that the DMA master bit is set */
	amiga_custom.dmacon = DMAF_SETCLR | DMAF_MASTER;

	/* don't use Z2 RAM as system memory on Z3 capable machines */
	if (AMIGAHW_PRESENT(ZORRO3)) {
		int i, j;
		u32 disabled_z2mem = 0;

		for (i = 0; i < m68k_num_memory; i++) {
			if (m68k_memory[i].addr < 16*1024*1024) {
				if (i == 0) {
					/* don't cut off the branch we're sitting on */
					pr_warn("Warning: kernel runs in Zorro II memory\n");
					continue;
				}
				disabled_z2mem += m68k_memory[i].size;
				m68k_num_memory--;
				for (j = i; j < m68k_num_memory; j++)
					m68k_memory[j] = m68k_memory[j+1];
				i--;
			}
		}
		if (disabled_z2mem)
			pr_info("%dK of Zorro II memory will not be used as system memory\n",
				disabled_z2mem>>10);
	}

	/* request all RAM */
	for (i = 0; i < m68k_num_memory; i++) {
		ram_resource[i].name =
			(m68k_memory[i].addr >= 0x01000000) ? "32-bit Fast RAM" :
			(m68k_memory[i].addr < 0x00c00000) ? "16-bit Fast RAM" :
			"16-bit Slow RAM";
		ram_resource[i].start = m68k_memory[i].addr;
		ram_resource[i].end = m68k_memory[i].addr+m68k_memory[i].size-1;
		request_resource(&iomem_resource, &ram_resource[i]);
	}

	/* initialize chipram allocator */
	amiga_chip_init();

	/* our beloved beeper */
	if (AMIGAHW_PRESENT(AMI_AUDIO))
		amiga_init_sound();

	/*
	 * if it is an A3000, set the magic bit that forces
	 * a hard rekick
	 */
	if (AMIGAHW_PRESENT(MAGIC_REKICK))
		*(unsigned char *)ZTWO_VADDR(0xde0002) |= 0x80;
}