setup.c

linux-2.4.29操作系统的源码

			continue;
		if (curr_pfn + size - 1 > PFN_DOWN(HIGHMEM_START))
			size = PFN_DOWN(HIGHMEM_START) - curr_pfn;
		if (!size)
			continue;

		/*
		 * ... finally, did all the rounding and playing
		 * around just make the area go away?
		 */
		if (last_pfn <= curr_pfn)
			continue;

		/* Register lowmem ranges */
		free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
	}

	/* Reserve the bootmap memory.  */
	reserve_bootmem(PFN_PHYS(first_usable_pfn), bootmap_size);

#ifdef CONFIG_BLK_DEV_INITRD
	/* Board specific code should have set up initrd_start and initrd_end */
	ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
	if (&__rd_start != &__rd_end) {
		initrd_start = (unsigned long)&__rd_start;
		initrd_end = (unsigned long)&__rd_end;
	}
	initrd_below_start_ok = 1;
	if (initrd_start) {
		unsigned long initrd_size = ((unsigned char *)initrd_end) - ((unsigned char *)initrd_start);
		printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
		       (void *)initrd_start,
		       initrd_size);
		if (PHYSADDR(initrd_end) > PFN_PHYS(max_low_pfn)) {
			printk("initrd extends beyond end of memory "
			       "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
			       (unsigned long) PHYSADDR(initrd_end),
			       PFN_PHYS(max_low_pfn));
			initrd_start = initrd_end = 0;
		}
	}
#endif /* CONFIG_BLK_DEV_INITRD  */
}

static inline void resource_init(void)
{
	int i;

	code_resource.start = virt_to_bus(&_ftext);
	code_resource.end = virt_to_bus(&_etext) - 1;
	data_resource.start = virt_to_bus(&_fdata);
	data_resource.end = virt_to_bus(&_edata) - 1;

	/*
	 * Request address space for all standard RAM.
	 */
	for (i = 0; i < boot_mem_map.nr_map; i++) {
		struct resource *res;
		unsigned long start, end;

		start = boot_mem_map.map[i].addr;
		end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1;
		if (start >= MAXMEM)
			continue;
		if (end >= MAXMEM)
			end = MAXMEM - 1;

		res = alloc_bootmem(sizeof(struct resource));
		switch (boot_mem_map.map[i].type) {
		case BOOT_MEM_RAM:
		case BOOT_MEM_ROM_DATA:
			res->name = "System RAM";
			break;
		case BOOT_MEM_RESERVED:
		default:
			res->name = "reserved";
		}

		res->start = start;
		res->end = end;

		res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
		request_resource(&iomem_resource, res);

		/*
		 *  We dont't know which RAM region contains kernel data,
		 *  so we try it repeatedly and let the resource manager
		 *  test it.
		 */
		request_resource(res, &code_resource);
		request_resource(res, &data_resource);
	}
}

#undef PFN_UP
#undef PFN_DOWN
#undef PFN_PHYS

#undef MAXMEM
#undef MAXMEM_PFN


void __init setup_arch(char **cmdline_p)
{
	void atlas_setup(void);
	void baget_setup(void);
	void cobalt_setup(void);
	void lasat_setup(void);
	void ddb_setup(void);
	void decstation_setup(void);
	void deskstation_setup(void);
	void jazz_setup(void);
	void sni_rm200_pci_setup(void);
	void ip22_setup(void);
	void ev96100_setup(void);
	void malta_setup(void);
	void sead_setup(void);
	void ikos_setup(void);
	void momenco_ocelot_setup(void);
	void momenco_ocelot_g_setup(void);
	void momenco_ocelot_c_setup(void);
	void momenco_jaguar_atx_setup(void);
	void nino_setup(void);
	void nec_osprey_setup(void);
	void nec_eagle_setup(void);
	void zao_capcella_setup(void);
	void victor_mpc30x_setup(void);
	void ibm_workpad_setup(void);
	void casio_e55_setup(void);
	void tanbac_tb0226_setup(void);
	void jmr3927_setup(void);
	void tx4927_setup(void);
 	void it8172_setup(void);
	void swarm_setup(void);
	void hp_setup(void);
	void au1x00_setup(void);
	void frame_info_init(void);

	frame_info_init();
#if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_BLK_DEV_FD_MODULE)
	fd_ops = &no_fd_ops;
#endif

#ifdef CONFIG_BLK_DEV_IDE
	ide_ops = &no_ide_ops;
#endif

	rtc_ops = &no_rtc_ops;

	switch(mips_machgroup)
	{
#ifdef CONFIG_BAGET_MIPS
	case MACH_GROUP_BAGET:
		baget_setup();
		break;
#endif
#ifdef CONFIG_MIPS_COBALT
        case MACH_GROUP_COBALT:
                cobalt_setup();
                break;
#endif
#ifdef CONFIG_DECSTATION
	case MACH_GROUP_DEC:
		decstation_setup();
		break;
#endif
#ifdef CONFIG_MIPS_ATLAS
	case MACH_GROUP_UNKNOWN:
		atlas_setup();
		break;
#endif
#ifdef CONFIG_MIPS_JAZZ
	case MACH_GROUP_JAZZ:
		jazz_setup();
		break;
#endif
#ifdef CONFIG_MIPS_MALTA
	case MACH_GROUP_UNKNOWN:
		malta_setup();
		break;
#endif
#ifdef CONFIG_MOMENCO_OCELOT
	case MACH_GROUP_MOMENCO:
		momenco_ocelot_setup();
		break;
#endif
#ifdef CONFIG_MOMENCO_OCELOT_G
	case MACH_GROUP_MOMENCO:
		momenco_ocelot_g_setup();
		break;
#endif
#ifdef CONFIG_MOMENCO_OCELOT_C
	case MACH_GROUP_MOMENCO:
		momenco_ocelot_c_setup();
		break;
#endif
#ifdef CONFIG_MOMENCO_JAGUAR_ATX
	case MACH_GROUP_MOMENCO:
		momenco_jaguar_atx_setup();
		break;
#endif
#ifdef CONFIG_MIPS_SEAD
	case MACH_GROUP_UNKNOWN:
		sead_setup();
		break;
#endif
#ifdef CONFIG_SGI_IP22
	/* As of now this is only IP22.  */
	case MACH_GROUP_SGI:
		ip22_setup();
		break;
#endif
#ifdef CONFIG_SNI_RM200_PCI
	case MACH_GROUP_SNI_RM:
		sni_rm200_pci_setup();
		break;
#endif
#ifdef CONFIG_DDB5074
	case MACH_GROUP_NEC_DDB:
		ddb_setup();
		break;
#endif
#ifdef CONFIG_DDB5476
       case MACH_GROUP_NEC_DDB:
               ddb_setup();
               break;
#endif
#ifdef CONFIG_DDB5477
       case MACH_GROUP_NEC_DDB:
               ddb_setup();
               break;
#endif
#ifdef CONFIG_CPU_VR41XX
	case MACH_GROUP_NEC_VR41XX:
		switch (mips_machtype) {
#ifdef CONFIG_NEC_OSPREY
		case MACH_NEC_OSPREY:
			nec_osprey_setup();
			break;
#endif
#ifdef CONFIG_NEC_EAGLE
		case MACH_NEC_EAGLE:
			nec_eagle_setup();
			break;
#endif
#ifdef CONFIG_ZAO_CAPCELLA
		case MACH_ZAO_CAPCELLA:
			zao_capcella_setup();
			break;
#endif
#ifdef CONFIG_VICTOR_MPC30X
		case MACH_VICTOR_MPC30X:
			victor_mpc30x_setup();
			break;
#endif
#ifdef CONFIG_IBM_WORKPAD
		case MACH_IBM_WORKPAD:
			ibm_workpad_setup();
			break;
#endif
#ifdef CONFIG_CASIO_E55
		case MACH_CASIO_E55:
			casio_e55_setup();
			break;
#endif
#ifdef CONFIG_TANBAC_TB0226
		case MACH_TANBAC_TB0226:
			tanbac_tb0226_setup();
			break;
#endif
#ifdef CONFIG_TANBAC_TB0229
		case MACH_TANBAC_TB0229:
			tanbac_tb0229_setup();
			break;
#endif
		}
		break;
#endif
#ifdef CONFIG_MIPS_EV96100
	case MACH_GROUP_GALILEO:
		ev96100_setup();
		break;
#endif
#ifdef CONFIG_MIPS_EV64120
	case MACH_GROUP_GALILEO:
		ev64120_setup();
		break;
#endif
#if defined(CONFIG_MIPS_IVR) || defined(CONFIG_MIPS_ITE8172)
	case  MACH_GROUP_ITE:
	case  MACH_GROUP_GLOBESPAN:
		it8172_setup();
		break;
#endif
#ifdef CONFIG_NINO
	case MACH_GROUP_PHILIPS:
		nino_setup();
		break;
#endif
#ifdef CONFIG_LASAT
        case MACH_GROUP_LASAT:
                lasat_setup();
                break;
#endif
#ifdef CONFIG_SOC_AU1X00
	case MACH_GROUP_ALCHEMY:
		au1x00_setup();
		break;
#endif
#ifdef CONFIG_TOSHIBA_JMR3927
	case MACH_GROUP_TOSHIBA:
		jmr3927_setup();
		break;
#endif
#ifdef CONFIG_TOSHIBA_RBTX4927
       case MACH_GROUP_TOSHIBA:
               tx4927_setup();
               break;
#endif
#ifdef CONFIG_SIBYTE_BOARD
	case MACH_GROUP_SIBYTE:
		swarm_setup();
		break;
#endif
#ifdef CONFIG_HP_LASERJET
        case MACH_GROUP_HP_LJ:
                hp_setup();
                break;
#endif
#ifdef  CONFIG_PMC_YOSEMITE
        case MACH_GROUP_TITAN:
                pmc_yosemite_setup();
                break;
#endif
	default:
		panic("Unsupported architecture");
	}

	strncpy(command_line, arcs_cmdline, sizeof command_line);
	command_line[sizeof command_line - 1] = 0;
	strcpy(saved_command_line, command_line);
	*cmdline_p = command_line;

	parse_mem_cmdline();

	bootmem_init();

	paging_init();

	resource_init();
}

static int __init fpu_disable(char *s)
{
	cpu_data[0].options &= ~MIPS_CPU_FPU;

	return 1;
}
__setup("nofpu", fpu_disable);