pmac_setup.c

来自「优龙2410linux2.6.8内核源代码」· C语言 代码 · 共 693 行 · 第 1/2 页

	 */
	if (find_devices("ohare") != NULL) {
		if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
			if (sysctrl_regs[4] & 0x10)
				sysctrl_regs[4] |= 0x04000020;
			else
				sysctrl_regs[4] |= 0x04000000;
			if(has_l2cache)
				printk(KERN_INFO "Level 2 cache enabled\n");
		}
	}
}

extern char *bootpath;
extern char *bootdevice;
void *boot_host;
int boot_target;
int boot_part;
extern dev_t boot_dev;

#ifdef CONFIG_SCSI
void __init
note_scsi_host(struct device_node *node, void *host)
{
	int l;
	char *p;

	l = strlen(node->full_name);
	if (bootpath != NULL && bootdevice != NULL
	    && strncmp(node->full_name, bootdevice, l) == 0
	    && (bootdevice[l] == '/' || bootdevice[l] == 0)) {
		boot_host = host;
		/*
		 * There's a bug in OF 1.0.5.  (Why am I not surprised.)
		 * If you pass a path like scsi/sd@1:0 to canon, it returns
		 * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0
		 * That is, the scsi target number doesn't get preserved.
		 * So we pick the target number out of bootpath and use that.
		 */
		p = strstr(bootpath, "/sd@");
		if (p != NULL) {
			p += 4;
			boot_target = simple_strtoul(p, NULL, 10);
			p = strchr(p, ':');
			if (p != NULL)
				boot_part = simple_strtoul(p + 1, NULL, 10);
		}
	}
}
#endif

#if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
static dev_t __init
find_ide_boot(void)
{
	char *p;
	int n;
	dev_t __init pmac_find_ide_boot(char *bootdevice, int n);

	if (bootdevice == NULL)
		return 0;
	p = strrchr(bootdevice, '/');
	if (p == NULL)
		return 0;
	n = p - bootdevice;

	return pmac_find_ide_boot(bootdevice, n);
}
#endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */

void __init
find_boot_device(void)
{
#if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC)
	boot_dev = find_ide_boot();
#endif
}

static int initializing = 1;

static int pmac_late_init(void)
{
	initializing = 0;
	return 0;
}

late_initcall(pmac_late_init);

/* can't be __init - can be called whenever a disk is first accessed */
void __pmac
note_bootable_part(dev_t dev, int part, int goodness)
{
	static int found_boot = 0;
	char *p;

	if (!initializing)
		return;
	if ((goodness <= current_root_goodness) &&
	    ROOT_DEV != DEFAULT_ROOT_DEVICE)
		return;
	p = strstr(saved_command_line, "root=");
	if (p != NULL && (p == saved_command_line || p[-1] == ' '))
		return;

	if (!found_boot) {
		find_boot_device();
		found_boot = 1;
	}
	if (!boot_dev || dev == boot_dev) {
		ROOT_DEV = dev + part;
		boot_dev = 0;
		current_root_goodness = goodness;
	}
}

void __pmac
pmac_restart(char *cmd)
{
#ifdef CONFIG_ADB_CUDA
	struct adb_request req;
#endif /* CONFIG_ADB_CUDA */

	switch (sys_ctrler) {
#ifdef CONFIG_ADB_CUDA
	case SYS_CTRLER_CUDA:
		cuda_request(&req, NULL, 2, CUDA_PACKET,
			     CUDA_RESET_SYSTEM);
		for (;;)
			cuda_poll();
		break;
#endif /* CONFIG_ADB_CUDA */
#ifdef CONFIG_ADB_PMU
	case SYS_CTRLER_PMU:
		pmu_restart();
		break;
#endif /* CONFIG_ADB_PMU */
	default: ;
	}
}

void __pmac
pmac_power_off(void)
{
#ifdef CONFIG_ADB_CUDA
	struct adb_request req;
#endif /* CONFIG_ADB_CUDA */

	switch (sys_ctrler) {
#ifdef CONFIG_ADB_CUDA
	case SYS_CTRLER_CUDA:
		cuda_request(&req, NULL, 2, CUDA_PACKET,
			     CUDA_POWERDOWN);
		for (;;)
			cuda_poll();
		break;
#endif /* CONFIG_ADB_CUDA */
#ifdef CONFIG_ADB_PMU
	case SYS_CTRLER_PMU:
		pmu_shutdown();
		break;
#endif /* CONFIG_ADB_PMU */
	default: ;
	}
}

void __pmac
pmac_halt(void)
{
   pmac_power_off();
}

/*
 * Read in a property describing some pieces of memory.
 */

static int __init
get_mem_prop(char *name, struct mem_pieces *mp)
{
	struct reg_property *rp;
	int i, s;
	unsigned int *ip;
	int nac = prom_n_addr_cells(memory_node);
	int nsc = prom_n_size_cells(memory_node);

	ip = (unsigned int *) get_property(memory_node, name, &s);
	if (ip == NULL) {
		printk(KERN_ERR "error: couldn't get %s property on /memory\n",
		       name);
		return 0;
	}
	s /= (nsc + nac) * 4;
	rp = mp->regions;
	for (i = 0; i < s; ++i, ip += nac+nsc) {
		if (nac >= 2 && ip[nac-2] != 0)
			continue;
		rp->address = ip[nac-1];
		if (nsc >= 2 && ip[nac+nsc-2] != 0)
			rp->size = ~0U;
		else
			rp->size = ip[nac+nsc-1];
		++rp;
	}
	mp->n_regions = rp - mp->regions;

	/* Make sure the pieces are sorted. */
	mem_pieces_sort(mp);
	mem_pieces_coalesce(mp);
	return 1;
}

/*
 * On systems with Open Firmware, collect information about
 * physical RAM and which pieces are already in use.
 * At this point, we have (at least) the first 8MB mapped with a BAT.
 * Our text, data, bss use something over 1MB, starting at 0.
 * Open Firmware may be using 1MB at the 4MB point.
 */
unsigned long __init
pmac_find_end_of_memory(void)
{
	unsigned long a, total;
	struct mem_pieces phys_mem;

	/*
	 * Find out where physical memory is, and check that it
	 * starts at 0 and is contiguous.  It seems that RAM is
	 * always physically contiguous on Power Macintoshes.
	 *
	 * Supporting discontiguous physical memory isn't hard,
	 * it just makes the virtual <-> physical mapping functions
	 * more complicated (or else you end up wasting space
	 * in mem_map).
	 */
	memory_node = find_devices("memory");
	if (memory_node == NULL || !get_mem_prop("reg", &phys_mem)
	    || phys_mem.n_regions == 0)
		panic("No RAM??");
	a = phys_mem.regions[0].address;
	if (a != 0)
		panic("RAM doesn't start at physical address 0");
	total = phys_mem.regions[0].size;

	if (phys_mem.n_regions > 1) {
		printk("RAM starting at 0x%x is not contiguous\n",
		       phys_mem.regions[1].address);
		printk("Using RAM from 0 to 0x%lx\n", total-1);
	}

	return total;
}

void __init
pmac_init(unsigned long r3, unsigned long r4, unsigned long r5,
	  unsigned long r6, unsigned long r7)
{
	/* isa_io_base gets set in pmac_find_bridges */
	isa_mem_base = PMAC_ISA_MEM_BASE;
	pci_dram_offset = PMAC_PCI_DRAM_OFFSET;
	ISA_DMA_THRESHOLD = ~0L;
	DMA_MODE_READ = 1;
	DMA_MODE_WRITE = 2;

	ppc_md.setup_arch     = pmac_setup_arch;
	ppc_md.show_cpuinfo   = pmac_show_cpuinfo;
	ppc_md.show_percpuinfo = pmac_show_percpuinfo;
	ppc_md.irq_canonicalize = NULL;
	ppc_md.init_IRQ       = pmac_pic_init;
	ppc_md.get_irq        = pmac_get_irq; /* Changed later on ... */

	ppc_md.pcibios_fixup  = pmac_pcibios_fixup;
	ppc_md.pcibios_enable_device_hook = pmac_pci_enable_device_hook;
	ppc_md.pcibios_after_init = pmac_pcibios_after_init;

	ppc_md.restart        = pmac_restart;
	ppc_md.power_off      = pmac_power_off;
	ppc_md.halt           = pmac_halt;

	ppc_md.time_init      = pmac_time_init;
	ppc_md.set_rtc_time   = pmac_set_rtc_time;
	ppc_md.get_rtc_time   = pmac_get_rtc_time;
	ppc_md.calibrate_decr = pmac_calibrate_decr;

	ppc_md.find_end_of_memory = pmac_find_end_of_memory;

	ppc_md.feature_call   = pmac_do_feature_call;

#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
#ifdef CONFIG_BLK_DEV_IDE_PMAC
        ppc_ide_md.ide_init_hwif	= pmac_ide_init_hwif_ports;
        ppc_ide_md.default_io_base	= pmac_ide_get_base;
#endif /* CONFIG_BLK_DEV_IDE_PMAC */
#endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */

#ifdef CONFIG_BOOTX_TEXT
	ppc_md.progress = pmac_progress;
#endif /* CONFIG_BOOTX_TEXT */

	if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0);

}

#ifdef CONFIG_BOOTX_TEXT
void __init
pmac_progress(char *s, unsigned short hex)
{
	if (boot_text_mapped) {
		btext_drawstring(s);
		btext_drawchar('\n');
	}
}
#endif /* CONFIG_BOOTX_TEXT */

static int __init
pmac_declare_of_platform_devices(void)
{
	struct device_node *np;

	np = find_devices("uni-n");
	if (np) {
		for (np = np->child; np != NULL; np = np->sibling)
			if (strncmp(np->name, "i2c", 3) == 0) {
				of_platform_device_create(np, "uni-n-i2c");
				break;
			}
	}
	np = find_devices("u3");
	if (np) {
		for (np = np->child; np != NULL; np = np->sibling)
			if (strncmp(np->name, "i2c", 3) == 0) {
				of_platform_device_create(np, "u3-i2c");
				break;
			}
	}

	np = find_devices("valkyrie");
	if (np)
		of_platform_device_create(np, "valkyrie");
	np = find_devices("platinum");
	if (np)
		of_platform_device_create(np, "platinum");

	return 0;
}

device_initcall(pmac_declare_of_platform_devices);