setup_64.c

linux-2.6.15.6

	kexec_setup();	/* requires unflattened device tree. */
#endif

	/*
	 * Fill the ppc64_caches & systemcfg structures with informations
	 * retreived from the device-tree. Need to be called before
	 * finish_device_tree() since the later requires some of the
	 * informations filled up here to properly parse the interrupt
	 * tree.
	 * It also sets up the cache line sizes which allows to call
	 * routines like flush_icache_range (used by the hash init
	 * later on).
	 */
	initialize_cache_info();

#ifdef CONFIG_PPC_RTAS
	/*
	 * Initialize RTAS if available
	 */
	rtas_initialize();
#endif /* CONFIG_PPC_RTAS */

	/*
	 * Check if we have an initrd provided via the device-tree
	 */
	check_for_initrd();

	/*
	 * Do some platform specific early initializations, that includes
	 * setting up the hash table pointers. It also sets up some interrupt-mapping
	 * related options that will be used by finish_device_tree()
	 */
	ppc_md.init_early();

	/*
	 * "Finish" the device-tree, that is do the actual parsing of
	 * some of the properties like the interrupt map
	 */
	finish_device_tree();

#ifdef CONFIG_BOOTX_TEXT
	init_boot_display();
#endif

	/*
	 * Initialize xmon
	 */
#ifdef CONFIG_XMON_DEFAULT
	xmon_init(1);
#endif
	/*
	 * Register early console
	 */
	register_early_udbg_console();

	/* Save unparsed command line copy for /proc/cmdline */
	strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);

	parse_early_param();

	check_smt_enabled();
	smp_setup_cpu_maps();

	/* Release secondary cpus out of their spinloops at 0x60 now that
	 * we can map physical -> logical CPU ids
	 */
	smp_release_cpus();

	printk("Starting Linux PPC64 %s\n", system_utsname.version);

	printk("-----------------------------------------------------\n");
	printk("ppc64_pft_size                = 0x%lx\n", ppc64_pft_size);
	printk("ppc64_interrupt_controller    = 0x%ld\n",
	       ppc64_interrupt_controller);
	printk("platform                      = 0x%x\n", _machine);
	printk("physicalMemorySize            = 0x%lx\n", lmb_phys_mem_size());
	printk("ppc64_caches.dcache_line_size = 0x%x\n",
	       ppc64_caches.dline_size);
	printk("ppc64_caches.icache_line_size = 0x%x\n",
	       ppc64_caches.iline_size);
	printk("htab_address                  = 0x%p\n", htab_address);
	printk("htab_hash_mask                = 0x%lx\n", htab_hash_mask);
	printk("-----------------------------------------------------\n");

	mm_init_ppc64();

	DBG(" <- setup_system()\n");
}

static int ppc64_panic_event(struct notifier_block *this,
                             unsigned long event, void *ptr)
{
	ppc_md.panic((char *)ptr);  /* May not return */
	return NOTIFY_DONE;
}

#ifdef CONFIG_IRQSTACKS
static void __init irqstack_early_init(void)
{
	unsigned int i;

	/*
	 * interrupt stacks must be under 256MB, we cannot afford to take
	 * SLB misses on them.
	 */
	for_each_cpu(i) {
		softirq_ctx[i] = (struct thread_info *)
			__va(lmb_alloc_base(THREAD_SIZE,
					    THREAD_SIZE, 0x10000000));
		hardirq_ctx[i] = (struct thread_info *)
			__va(lmb_alloc_base(THREAD_SIZE,
					    THREAD_SIZE, 0x10000000));
	}
}
#else
#define irqstack_early_init()
#endif

/*
 * Stack space used when we detect a bad kernel stack pointer, and
 * early in SMP boots before relocation is enabled.
 */
static void __init emergency_stack_init(void)
{
	unsigned long limit;
	unsigned int i;

	/*
	 * Emergency stacks must be under 256MB, we cannot afford to take
	 * SLB misses on them. The ABI also requires them to be 128-byte
	 * aligned.
	 *
	 * Since we use these as temporary stacks during secondary CPU
	 * bringup, we need to get at them in real mode. This means they
	 * must also be within the RMO region.
	 */
	limit = min(0x10000000UL, lmb.rmo_size);

	for_each_cpu(i)
		paca[i].emergency_sp =
		__va(lmb_alloc_base(HW_PAGE_SIZE, 128, limit)) + HW_PAGE_SIZE;
}

/*
 * Called into from start_kernel, after lock_kernel has been called.
 * Initializes bootmem, which is unsed to manage page allocation until
 * mem_init is called.
 */
void __init setup_arch(char **cmdline_p)
{
	extern void do_init_bootmem(void);

	ppc64_boot_msg(0x12, "Setup Arch");

	*cmdline_p = cmd_line;

	/*
	 * Set cache line size based on type of cpu as a default.
	 * Systems with OF can look in the properties on the cpu node(s)
	 * for a possibly more accurate value.
	 */
	dcache_bsize = ppc64_caches.dline_size;
	icache_bsize = ppc64_caches.iline_size;

	/* reboot on panic */
	panic_timeout = 180;

	if (ppc_md.panic)
		notifier_chain_register(&panic_notifier_list, &ppc64_panic_block);

	init_mm.start_code = PAGE_OFFSET;
	init_mm.end_code = (unsigned long) _etext;
	init_mm.end_data = (unsigned long) _edata;
	init_mm.brk = klimit;
	
	irqstack_early_init();
	emergency_stack_init();

	stabs_alloc();

	/* set up the bootmem stuff with available memory */
	do_init_bootmem();
	sparse_init();

#ifdef CONFIG_DUMMY_CONSOLE
	conswitchp = &dummy_con;
#endif

	ppc_md.setup_arch();

	/* Use the default idle loop if the platform hasn't provided one. */
	if (NULL == ppc_md.idle_loop) {
		ppc_md.idle_loop = default_idle;
		printk(KERN_INFO "Using default idle loop\n");
	}

	paging_init();
	ppc64_boot_msg(0x15, "Setup Done");
}


/* ToDo: do something useful if ppc_md is not yet setup. */
#define PPC64_LINUX_FUNCTION 0x0f000000
#define PPC64_IPL_MESSAGE 0xc0000000
#define PPC64_TERM_MESSAGE 0xb0000000

static void ppc64_do_msg(unsigned int src, const char *msg)
{
	if (ppc_md.progress) {
		char buf[128];

		sprintf(buf, "%08X\n", src);
		ppc_md.progress(buf, 0);
		snprintf(buf, 128, "%s", msg);
		ppc_md.progress(buf, 0);
	}
}

/* Print a boot progress message. */
void ppc64_boot_msg(unsigned int src, const char *msg)
{
	ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg);
	printk("[boot]%04x %s\n", src, msg);
}

/* Print a termination message (print only -- does not stop the kernel) */
void ppc64_terminate_msg(unsigned int src, const char *msg)
{
	ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg);
	printk("[terminate]%04x %s\n", src, msg);
}

#ifndef CONFIG_PPC_ISERIES
/*
 * This function can be used by platforms to "find" legacy serial ports.
 * It works for "serial" nodes under an "isa" node, and will try to
 * respect the "ibm,aix-loc" property if any. It works with up to 8
 * ports.
 */

#define MAX_LEGACY_SERIAL_PORTS	8
static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1];
static unsigned int old_serial_count;

void __init generic_find_legacy_serial_ports(u64 *physport,
		unsigned int *default_speed)
{
	struct device_node *np;
	u32 *sizeprop;

	struct isa_reg_property {
		u32 space;
		u32 address;
		u32 size;
	};
	struct pci_reg_property {
		struct pci_address addr;
		u32 size_hi;
		u32 size_lo;
	};                                                                        

	DBG(" -> generic_find_legacy_serial_port()\n");

	*physport = 0;
	if (default_speed)
		*default_speed = 0;

	np = of_find_node_by_path("/");
	if (!np)
		return;

	/* First fill our array */
	for (np = NULL; (np = of_find_node_by_type(np, "serial"));) {
		struct device_node *isa, *pci;
		struct isa_reg_property *reg;
		unsigned long phys_size, addr_size, io_base;
		u32 *rangesp;
		u32 *interrupts, *clk, *spd;
		char *typep;
		int index, rlen, rentsize;

		/* Ok, first check if it's under an "isa" parent */
		isa = of_get_parent(np);
		if (!isa || strcmp(isa->name, "isa")) {
			DBG("%s: no isa parent found\n", np->full_name);
			continue;
		}
		
		/* Now look for an "ibm,aix-loc" property that gives us ordering
		 * if any...
		 */
	 	typep = (char *)get_property(np, "ibm,aix-loc", NULL);

		/* Get the ISA port number */
		reg = (struct isa_reg_property *)get_property(np, "reg", NULL);	
		if (reg == NULL)
			goto next_port;
		/* We assume the interrupt number isn't translated ... */
		interrupts = (u32 *)get_property(np, "interrupts", NULL);
		/* get clock freq. if present */
		clk = (u32 *)get_property(np, "clock-frequency", NULL);
		/* get default speed if present */
		spd = (u32 *)get_property(np, "current-speed", NULL);
		/* Default to locate at end of array */
		index = old_serial_count; /* end of the array by default */

		/* If we have a location index, then use it */
		if (typep && *typep == 'S') {
			index = simple_strtol(typep+1, NULL, 0) - 1;
			/* if index is out of range, use end of array instead */
			if (index >= MAX_LEGACY_SERIAL_PORTS)
				index = old_serial_count;
			/* if our index is still out of range, that mean that
			 * array is full, we could scan for a free slot but that
			 * make little sense to bother, just skip the port
			 */
			if (index >= MAX_LEGACY_SERIAL_PORTS)
				goto next_port;
			if (index >= old_serial_count)
				old_serial_count = index + 1;
			/* Check if there is a port who already claimed our slot */
			if (serial_ports[index].iobase != 0) {
				/* if we still have some room, move it, else override */
				if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) {
					DBG("Moved legacy port %d -> %d\n", index,
					    old_serial_count);
					serial_ports[old_serial_count++] =
						serial_ports[index];
				} else {
					DBG("Replacing legacy port %d\n", index);
				}
			}
		}
		if (index >= MAX_LEGACY_SERIAL_PORTS)
			goto next_port;
		if (index >= old_serial_count)
			old_serial_count = index + 1;

		/* Now fill the entry */
		memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port));
		serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16;
		serial_ports[index].iobase = reg->address;
		serial_ports[index].irq = interrupts ? interrupts[0] : 0;
		serial_ports[index].flags = ASYNC_BOOT_AUTOCONF;

		DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n",
		    index,
		    serial_ports[index].iobase,
		    serial_ports[index].irq,
		    serial_ports[index].uartclk);

		/* Get phys address of IO reg for port 1 */
		if (index != 0)
			goto next_port;

		pci = of_get_parent(isa);
		if (!pci) {
			DBG("%s: no pci parent found\n", np->full_name);
			goto next_port;
		}

		rangesp = (u32 *)get_property(pci, "ranges", &rlen);
		if (rangesp == NULL) {
			of_node_put(pci);
			goto next_port;
		}
		rlen /= 4;

		/* we need the #size-cells of the PCI bridge node itself */
		phys_size = 1;
		sizeprop = (u32 *)get_property(pci, "#size-cells", NULL);
		if (sizeprop != NULL)
			phys_size = *sizeprop;
		/* we need the parent #addr-cells */
		addr_size = prom_n_addr_cells(pci);
		rentsize = 3 + addr_size + phys_size;
		io_base = 0;
		for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) {
			if (((rangesp[0] >> 24) & 0x3) != 1)
				continue; /* not IO space */
			io_base = rangesp[3];
			if (addr_size == 2)
				io_base = (io_base << 32) | rangesp[4];
		}
		if (io_base != 0) {
			*physport = io_base + reg->address;
			if (default_speed && spd)
				*default_speed = *spd;
		}
		of_node_put(pci);
	next_port:
		of_node_put(isa);
	}

	DBG(" <- generic_find_legacy_serial_port()\n");
}

static struct platform_device serial_device = {
	.name	= "serial8250",
	.id	= PLAT8250_DEV_PLATFORM,
	.dev	= {
		.platform_data = serial_ports,
	},
};

static int __init serial_dev_init(void)
{
	return platform_device_register(&serial_device);
}
arch_initcall(serial_dev_init);

#endif /* CONFIG_PPC_ISERIES */

int check_legacy_ioport(unsigned long base_port)
{
	if (ppc_md.check_legacy_ioport == NULL)
		return 0;
	return ppc_md.check_legacy_ioport(base_port);
}
EXPORT_SYMBOL(check_legacy_ioport);

void cpu_die(void)
{
	if (ppc_md.cpu_die)
		ppc_md.cpu_die();
}