X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fpowerpc%2Fkernel%2Fprom.c;fp=arch%2Fpowerpc%2Fkernel%2Fprom.c;h=a1787ffb6319bfcc59004df9d1faba5f6d0209d9;hb=16c70f8c1b54b61c3b951b6fb220df250fe09b32;hp=9a07f97f0712d78ce271b6ec35190cf92032be26;hpb=4e76c8a9fa413ccc09d3f7f664183dcce3555d57;p=linux-2.6.git diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 9a07f97f0..a1787ffb6 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -16,7 +16,6 @@ #undef DEBUG #include -#include #include #include #include @@ -30,6 +29,8 @@ #include #include #include +#include +#include #include #include @@ -50,6 +51,7 @@ #include #include #include +#include #ifdef DEBUG #define DBG(fmt...) printk(KERN_ERR fmt) @@ -85,424 +87,6 @@ static DEFINE_RWLOCK(devtree_lock); /* export that to outside world */ struct device_node *of_chosen; -struct device_node *dflt_interrupt_controller; -int num_interrupt_controllers; - -/* - * Wrapper for allocating memory for various data that needs to be - * attached to device nodes as they are processed at boot or when - * added to the device tree later (e.g. DLPAR). At boot there is - * already a region reserved so we just increment *mem_start by size; - * otherwise we call kmalloc. - */ -static void * prom_alloc(unsigned long size, unsigned long *mem_start) -{ - unsigned long tmp; - - if (!mem_start) - return kmalloc(size, GFP_KERNEL); - - tmp = *mem_start; - *mem_start += size; - return (void *)tmp; -} - -/* - * Find the device_node with a given phandle. - */ -static struct device_node * find_phandle(phandle ph) -{ - struct device_node *np; - - for (np = allnodes; np != 0; np = np->allnext) - if (np->linux_phandle == ph) - return np; - return NULL; -} - -/* - * Find the interrupt parent of a node. - */ -static struct device_node * __devinit intr_parent(struct device_node *p) -{ - phandle *parp; - - parp = (phandle *) get_property(p, "interrupt-parent", NULL); - if (parp == NULL) - return p->parent; - p = find_phandle(*parp); - if (p != NULL) - return p; - /* - * On a powermac booted with BootX, we don't get to know the - * phandles for any nodes, so find_phandle will return NULL. - * Fortunately these machines only have one interrupt controller - * so there isn't in fact any ambiguity. -- paulus - */ - if (num_interrupt_controllers == 1) - p = dflt_interrupt_controller; - return p; -} - -/* - * Find out the size of each entry of the interrupts property - * for a node. - */ -int __devinit prom_n_intr_cells(struct device_node *np) -{ - struct device_node *p; - unsigned int *icp; - - for (p = np; (p = intr_parent(p)) != NULL; ) { - icp = (unsigned int *) - get_property(p, "#interrupt-cells", NULL); - if (icp != NULL) - return *icp; - if (get_property(p, "interrupt-controller", NULL) != NULL - || get_property(p, "interrupt-map", NULL) != NULL) { - printk("oops, node %s doesn't have #interrupt-cells\n", - p->full_name); - return 1; - } - } -#ifdef DEBUG_IRQ - printk("prom_n_intr_cells failed for %s\n", np->full_name); -#endif - return 1; -} - -/* - * Map an interrupt from a device up to the platform interrupt - * descriptor. - */ -static int __devinit map_interrupt(unsigned int **irq, struct device_node **ictrler, - struct device_node *np, unsigned int *ints, - int nintrc) -{ - struct device_node *p, *ipar; - unsigned int *imap, *imask, *ip; - int i, imaplen, match; - int newintrc = 0, newaddrc = 0; - unsigned int *reg; - int naddrc; - - reg = (unsigned int *) get_property(np, "reg", NULL); - naddrc = prom_n_addr_cells(np); - p = intr_parent(np); - while (p != NULL) { - if (get_property(p, "interrupt-controller", NULL) != NULL) - /* this node is an interrupt controller, stop here */ - break; - imap = (unsigned int *) - get_property(p, "interrupt-map", &imaplen); - if (imap == NULL) { - p = intr_parent(p); - continue; - } - imask = (unsigned int *) - get_property(p, "interrupt-map-mask", NULL); - if (imask == NULL) { - printk("oops, %s has interrupt-map but no mask\n", - p->full_name); - return 0; - } - imaplen /= sizeof(unsigned int); - match = 0; - ipar = NULL; - while (imaplen > 0 && !match) { - /* check the child-interrupt field */ - match = 1; - for (i = 0; i < naddrc && match; ++i) - match = ((reg[i] ^ imap[i]) & imask[i]) == 0; - for (; i < naddrc + nintrc && match; ++i) - match = ((ints[i-naddrc] ^ imap[i]) & imask[i]) == 0; - imap += naddrc + nintrc; - imaplen -= naddrc + nintrc; - /* grab the interrupt parent */ - ipar = find_phandle((phandle) *imap++); - --imaplen; - if (ipar == NULL && num_interrupt_controllers == 1) - /* cope with BootX not giving us phandles */ - ipar = dflt_interrupt_controller; - if (ipar == NULL) { - printk("oops, no int parent %x in map of %s\n", - imap[-1], p->full_name); - return 0; - } - /* find the parent's # addr and intr cells */ - ip = (unsigned int *) - get_property(ipar, "#interrupt-cells", NULL); - if (ip == NULL) { - printk("oops, no #interrupt-cells on %s\n", - ipar->full_name); - return 0; - } - newintrc = *ip; - ip = (unsigned int *) - get_property(ipar, "#address-cells", NULL); - newaddrc = (ip == NULL)? 0: *ip; - imap += newaddrc + newintrc; - imaplen -= newaddrc + newintrc; - } - if (imaplen < 0) { - printk("oops, error decoding int-map on %s, len=%d\n", - p->full_name, imaplen); - return 0; - } - if (!match) { -#ifdef DEBUG_IRQ - printk("oops, no match in %s int-map for %s\n", - p->full_name, np->full_name); -#endif - return 0; - } - p = ipar; - naddrc = newaddrc; - nintrc = newintrc; - ints = imap - nintrc; - reg = ints - naddrc; - } - if (p == NULL) { -#ifdef DEBUG_IRQ - printk("hmmm, int tree for %s doesn't have ctrler\n", - np->full_name); -#endif - return 0; - } - *irq = ints; - *ictrler = p; - return nintrc; -} - -static unsigned char map_isa_senses[4] = { - IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE, - IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE, - IRQ_SENSE_EDGE | IRQ_POLARITY_NEGATIVE, - IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE -}; - -static unsigned char map_mpic_senses[4] = { - IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE, - IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE, - /* 2 seems to be used for the 8259 cascade... */ - IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE, - IRQ_SENSE_EDGE | IRQ_POLARITY_NEGATIVE, -}; - -static int __devinit finish_node_interrupts(struct device_node *np, - unsigned long *mem_start, - int measure_only) -{ - unsigned int *ints; - int intlen, intrcells, intrcount; - int i, j, n, sense; - unsigned int *irq, virq; - struct device_node *ic; - int trace = 0; - - //#define TRACE(fmt...) do { if (trace) { printk(fmt); mdelay(1000); } } while(0) -#define TRACE(fmt...) - - if (!strcmp(np->name, "smu-doorbell")) - trace = 1; - - TRACE("Finishing SMU doorbell ! num_interrupt_controllers = %d\n", - num_interrupt_controllers); - - if (num_interrupt_controllers == 0) { - /* - * Old machines just have a list of interrupt numbers - * and no interrupt-controller nodes. - */ - ints = (unsigned int *) get_property(np, "AAPL,interrupts", - &intlen); - /* XXX old interpret_pci_props looked in parent too */ - /* XXX old interpret_macio_props looked for interrupts - before AAPL,interrupts */ - if (ints == NULL) - ints = (unsigned int *) get_property(np, "interrupts", - &intlen); - if (ints == NULL) - return 0; - - np->n_intrs = intlen / sizeof(unsigned int); - np->intrs = prom_alloc(np->n_intrs * sizeof(np->intrs[0]), - mem_start); - if (!np->intrs) - return -ENOMEM; - if (measure_only) - return 0; - - for (i = 0; i < np->n_intrs; ++i) { - np->intrs[i].line = *ints++; - np->intrs[i].sense = IRQ_SENSE_LEVEL - | IRQ_POLARITY_NEGATIVE; - } - return 0; - } - - ints = (unsigned int *) get_property(np, "interrupts", &intlen); - TRACE("ints=%p, intlen=%d\n", ints, intlen); - if (ints == NULL) - return 0; - intrcells = prom_n_intr_cells(np); - intlen /= intrcells * sizeof(unsigned int); - TRACE("intrcells=%d, new intlen=%d\n", intrcells, intlen); - np->intrs = prom_alloc(intlen * sizeof(*(np->intrs)), mem_start); - if (!np->intrs) - return -ENOMEM; - - if (measure_only) - return 0; - - intrcount = 0; - for (i = 0; i < intlen; ++i, ints += intrcells) { - n = map_interrupt(&irq, &ic, np, ints, intrcells); - TRACE("map, irq=%d, ic=%p, n=%d\n", irq, ic, n); - if (n <= 0) - continue; - - /* don't map IRQ numbers under a cascaded 8259 controller */ - if (ic && device_is_compatible(ic, "chrp,iic")) { - np->intrs[intrcount].line = irq[0]; - sense = (n > 1)? (irq[1] & 3): 3; - np->intrs[intrcount].sense = map_isa_senses[sense]; - } else { - virq = virt_irq_create_mapping(irq[0]); - TRACE("virq=%d\n", virq); -#ifdef CONFIG_PPC64 - if (virq == NO_IRQ) { - printk(KERN_CRIT "Could not allocate interrupt" - " number for %s\n", np->full_name); - continue; - } -#endif - np->intrs[intrcount].line = irq_offset_up(virq); - sense = (n > 1)? (irq[1] & 3): 1; - - /* Apple uses bits in there in a different way, let's - * only keep the real sense bit on macs - */ - if (machine_is(powermac)) - sense &= 0x1; - np->intrs[intrcount].sense = map_mpic_senses[sense]; - } - -#ifdef CONFIG_PPC64 - /* We offset irq numbers for the u3 MPIC by 128 in PowerMac */ - if (machine_is(powermac) && ic && ic->parent) { - char *name = get_property(ic->parent, "name", NULL); - if (name && !strcmp(name, "u3")) - np->intrs[intrcount].line += 128; - else if (!(name && (!strcmp(name, "mac-io") || - !strcmp(name, "u4")))) - /* ignore other cascaded controllers, such as - the k2-sata-root */ - break; - } -#endif /* CONFIG_PPC64 */ - if (n > 2) { - printk("hmmm, got %d intr cells for %s:", n, - np->full_name); - for (j = 0; j < n; ++j) - printk(" %d", irq[j]); - printk("\n"); - } - ++intrcount; - } - np->n_intrs = intrcount; - - return 0; -} - -static int __devinit finish_node(struct device_node *np, - unsigned long *mem_start, - int measure_only) -{ - struct device_node *child; - int rc = 0; - - rc = finish_node_interrupts(np, mem_start, measure_only); - if (rc) - goto out; - - for (child = np->child; child != NULL; child = child->sibling) { - rc = finish_node(child, mem_start, measure_only); - if (rc) - goto out; - } -out: - return rc; -} - -static void __init scan_interrupt_controllers(void) -{ - struct device_node *np; - int n = 0; - char *name, *ic; - int iclen; - - for (np = allnodes; np != NULL; np = np->allnext) { - ic = get_property(np, "interrupt-controller", &iclen); - name = get_property(np, "name", NULL); - /* checking iclen makes sure we don't get a false - match on /chosen.interrupt_controller */ - if ((name != NULL - && strcmp(name, "interrupt-controller") == 0) - || (ic != NULL && iclen == 0 - && strcmp(name, "AppleKiwi"))) { - if (n == 0) - dflt_interrupt_controller = np; - ++n; - } - } - num_interrupt_controllers = n; -} - -/** - * finish_device_tree is called once things are running normally - * (i.e. with text and data mapped to the address they were linked at). - * It traverses the device tree and fills in some of the additional, - * fields in each node like {n_}addrs and {n_}intrs, the virt interrupt - * mapping is also initialized at this point. - */ -void __init finish_device_tree(void) -{ - unsigned long start, end, size = 0; - - DBG(" -> finish_device_tree\n"); - -#ifdef CONFIG_PPC64 - /* Initialize virtual IRQ map */ - virt_irq_init(); -#endif - scan_interrupt_controllers(); - - /* - * Finish device-tree (pre-parsing some properties etc...) - * We do this in 2 passes. One with "measure_only" set, which - * will only measure the amount of memory needed, then we can - * allocate that memory, and call finish_node again. However, - * we must be careful as most routines will fail nowadays when - * prom_alloc() returns 0, so we must make sure our first pass - * doesn't start at 0. We pre-initialize size to 16 for that - * reason and then remove those additional 16 bytes - */ - size = 16; - finish_node(allnodes, &size, 1); - size -= 16; - - if (0 == size) - end = start = 0; - else - end = start = (unsigned long)__va(lmb_alloc(size, 128)); - - finish_node(allnodes, &end, 0); - BUG_ON(end != start + size); - - DBG(" <- finish_device_tree\n"); -} - static inline char *find_flat_dt_string(u32 offset) { return ((char *)initial_boot_params) + @@ -836,6 +420,42 @@ static unsigned long __init unflatten_dt_node(unsigned long mem, return mem; } +static int __init early_parse_mem(char *p) +{ + if (!p) + return 1; + + memory_limit = PAGE_ALIGN(memparse(p, &p)); + DBG("memory limit = 0x%lx\n", memory_limit); + + return 0; +} +early_param("mem", early_parse_mem); + +/* + * The device tree may be allocated below our memory limit, or inside the + * crash kernel region for kdump. If so, move it out now. + */ +static void move_device_tree(void) +{ + unsigned long start, size; + void *p; + + DBG("-> move_device_tree\n"); + + start = __pa(initial_boot_params); + size = initial_boot_params->totalsize; + + if ((memory_limit && (start + size) > memory_limit) || + overlaps_crashkernel(start, size)) { + p = __va(lmb_alloc_base(size, PAGE_SIZE, lmb.rmo_size)); + memcpy(p, initial_boot_params, size); + initial_boot_params = (struct boot_param_header *)p; + DBG("Moved device tree to 0x%p\n", p); + } + + DBG("<- move_device_tree\n"); +} /** * unflattens the device-tree passed by the firmware, creating the @@ -911,7 +531,11 @@ static struct ibm_pa_feature { {CPU_FTR_CTRL, 0, 0, 3, 0}, {CPU_FTR_NOEXECUTE, 0, 0, 6, 0}, {CPU_FTR_NODSISRALIGN, 0, 1, 1, 1}, +#if 0 + /* put this back once we know how to test if firmware does 64k IO */ {CPU_FTR_CI_LARGE_PAGE, 0, 1, 2, 0}, +#endif + {CPU_FTR_REAL_LE, PPC_FEATURE_TRUE_LE, 5, 0, 0}, }; static void __init check_cpu_pa_features(unsigned long node) @@ -1070,6 +694,7 @@ static int __init early_init_dt_scan_chosen(unsigned long node, iommu_force_on = 1; #endif + /* mem=x on the command line is the preferred mechanism */ lprop = of_get_flat_dt_prop(node, "linux,memory-limit", NULL); if (lprop) memory_limit = *lprop; @@ -1083,24 +708,6 @@ static int __init early_init_dt_scan_chosen(unsigned long node, tce_alloc_end = *lprop; #endif -#ifdef CONFIG_PPC_RTAS - /* To help early debugging via the front panel, we retrieve a minimal - * set of RTAS infos now if available - */ - { - u64 *basep, *entryp, *sizep; - - basep = of_get_flat_dt_prop(node, "linux,rtas-base", NULL); - entryp = of_get_flat_dt_prop(node, "linux,rtas-entry", NULL); - sizep = of_get_flat_dt_prop(node, "linux,rtas-size", NULL); - if (basep && entryp && sizep) { - rtas.base = *basep; - rtas.entry = *entryp; - rtas.size = *sizep; - } - } -#endif /* CONFIG_PPC_RTAS */ - #ifdef CONFIG_KEXEC lprop = (u64*)of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL); if (lprop) @@ -1123,17 +730,6 @@ static int __init early_init_dt_scan_chosen(unsigned long node, DBG("Command line is: %s\n", cmd_line); - if (strstr(cmd_line, "mem=")) { - char *p, *q; - - for (q = cmd_line; (p = strstr(q, "mem=")) != 0; ) { - q = p + 4; - if (p > cmd_line && p[-1] != ' ') - continue; - memory_limit = memparse(q, &q); - } - } - /* break now */ return 1; } @@ -1237,9 +833,17 @@ static void __init early_reserve_mem(void) { u64 base, size; u64 *reserve_map; + unsigned long self_base; + unsigned long self_size; reserve_map = (u64 *)(((unsigned long)initial_boot_params) + initial_boot_params->off_mem_rsvmap); + + /* before we do anything, lets reserve the dt blob */ + self_base = __pa((unsigned long)initial_boot_params); + self_size = initial_boot_params->totalsize; + lmb_reserve(self_base, self_size); + #ifdef CONFIG_PPC32 /* * Handle the case where we might be booting from an old kexec @@ -1254,6 +858,9 @@ static void __init early_reserve_mem(void) size_32 = *(reserve_map_32++); if (size_32 == 0) break; + /* skip if the reservation is for the blob */ + if (base_32 == self_base && size_32 == self_size) + continue; DBG("reserving: %x -> %x\n", base_32, size_32); lmb_reserve(base_32, size_32); } @@ -1265,6 +872,9 @@ static void __init early_reserve_mem(void) size = *(reserve_map++); if (size == 0) break; + /* skip if the reservation is for the blob */ + if (base == self_base && size == self_size) + continue; DBG("reserving: %llx -> %llx\n", base, size); lmb_reserve(base, size); } @@ -1282,6 +892,11 @@ void __init early_init_devtree(void *params) /* Setup flat device-tree pointer */ initial_boot_params = params; +#ifdef CONFIG_PPC_RTAS + /* Some machines might need RTAS info for debugging, grab it now. */ + of_scan_flat_dt(early_init_dt_scan_rtas, NULL); +#endif + /* Retrieve various informations from the /chosen node of the * device-tree, including the platform type, initrd location and * size, TCE reserve, and more ... @@ -1292,18 +907,26 @@ void __init early_init_devtree(void *params) lmb_init(); of_scan_flat_dt(early_init_dt_scan_root, NULL); of_scan_flat_dt(early_init_dt_scan_memory, NULL); - lmb_enforce_memory_limit(memory_limit); - lmb_analyze(); - DBG("Phys. mem: %lx\n", lmb_phys_mem_size()); + /* Save command line for /proc/cmdline and then parse parameters */ + strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); + parse_early_param(); /* Reserve LMB regions used by kernel, initrd, dt, etc... */ lmb_reserve(PHYSICAL_START, __pa(klimit) - PHYSICAL_START); -#ifdef CONFIG_CRASH_DUMP - lmb_reserve(0, KDUMP_RESERVE_LIMIT); -#endif + reserve_kdump_trampoline(); + reserve_crashkernel(); early_reserve_mem(); + lmb_enforce_memory_limit(memory_limit); + lmb_analyze(); + + DBG("Phys. mem: %lx\n", lmb_phys_mem_size()); + + /* We may need to relocate the flat tree, do it now. + * FIXME .. and the initrd too? */ + move_device_tree(); + DBG("Scanning CPUs ...\n"); /* Retreive CPU related informations from the flat tree @@ -1348,27 +971,6 @@ prom_n_size_cells(struct device_node* np) } EXPORT_SYMBOL(prom_n_size_cells); -/** - * Work out the sense (active-low level / active-high edge) - * of each interrupt from the device tree. - */ -void __init prom_get_irq_senses(unsigned char *senses, int off, int max) -{ - struct device_node *np; - int i, j; - - /* default to level-triggered */ - memset(senses, IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE, max - off); - - for (np = allnodes; np != 0; np = np->allnext) { - for (j = 0; j < np->n_intrs; j++) { - i = np->intrs[j].line; - if (i >= off && i < max) - senses[i-off] = np->intrs[j].sense; - } - } -} - /** * Construct and return a list of the device_nodes with a given name. */ @@ -1768,7 +1370,6 @@ static void of_node_release(struct kref *kref) node->deadprops = NULL; } } - kfree(node->intrs); kfree(node->full_name); kfree(node->data); kfree(node); @@ -1841,13 +1442,7 @@ void of_detach_node(const struct device_node *np) #ifdef CONFIG_PPC_PSERIES /* * Fix up the uninitialized fields in a new device node: - * name, type, n_addrs, addrs, n_intrs, intrs, and pci-specific fields - * - * A lot of boot-time code is duplicated here, because functions such - * as finish_node_interrupts, interpret_pci_props, etc. cannot use the - * slab allocator. - * - * This should probably be split up into smaller chunks. + * name, type and pci-specific fields */ static int of_finish_dynamic_node(struct device_node *node) @@ -1888,8 +1483,6 @@ static int prom_reconfig_notifier(struct notifier_block *nb, switch (action) { case PSERIES_RECONFIG_ADD: err = of_finish_dynamic_node(node); - if (!err) - finish_node(node, NULL, 0); if (err < 0) { printk(KERN_ERR "finish_node returned %d\n", err); err = NOTIFY_BAD; @@ -1935,8 +1528,7 @@ struct property *of_find_property(struct device_node *np, const char *name, * Find a property with a given name for a given node * and return the value. */ -unsigned char *get_property(struct device_node *np, const char *name, - int *lenp) +void *get_property(struct device_node *np, const char *name, int *lenp) { struct property *pp = of_find_property(np,name,lenp); return pp ? pp->value : NULL; @@ -2053,29 +1645,70 @@ int prom_update_property(struct device_node *np, return 0; } -#ifdef CONFIG_KEXEC -/* We may have allocated the flat device tree inside the crash kernel region - * in prom_init. If so we need to move it out into regular memory. */ -void kdump_move_device_tree(void) + +/* Find the device node for a given logical cpu number, also returns the cpu + * local thread number (index in ibm,interrupt-server#s) if relevant and + * asked for (non NULL) + */ +struct device_node *of_get_cpu_node(int cpu, unsigned int *thread) { - unsigned long start, end; - struct boot_param_header *new; + int hardid; + struct device_node *np; - start = __pa((unsigned long)initial_boot_params); - end = start + initial_boot_params->totalsize; + hardid = get_hard_smp_processor_id(cpu); - if (end < crashk_res.start || start > crashk_res.end) - return; + for_each_node_by_type(np, "cpu") { + u32 *intserv; + unsigned int plen, t; + + /* Check for ibm,ppc-interrupt-server#s. If it doesn't exist + * fallback to "reg" property and assume no threads + */ + intserv = (u32 *)get_property(np, "ibm,ppc-interrupt-server#s", + &plen); + if (intserv == NULL) { + u32 *reg = (u32 *)get_property(np, "reg", NULL); + if (reg == NULL) + continue; + if (*reg == hardid) { + if (thread) + *thread = 0; + return np; + } + } else { + plen /= sizeof(u32); + for (t = 0; t < plen; t++) { + if (hardid == intserv[t]) { + if (thread) + *thread = t; + return np; + } + } + } + } + return NULL; +} + +#ifdef DEBUG +static struct debugfs_blob_wrapper flat_dt_blob; - new = (struct boot_param_header*) - __va(lmb_alloc(initial_boot_params->totalsize, PAGE_SIZE)); +static int __init export_flat_device_tree(void) +{ + struct dentry *d; - memcpy(new, initial_boot_params, initial_boot_params->totalsize); + d = debugfs_create_dir("powerpc", NULL); + if (!d) + return 1; - initial_boot_params = new; + flat_dt_blob.data = initial_boot_params; + flat_dt_blob.size = initial_boot_params->totalsize; - DBG("Flat device tree blob moved to %p\n", initial_boot_params); + d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR, + d, &flat_dt_blob); + if (!d) + return 1; - /* XXX should we unreserve the old DT? */ + return 0; } -#endif /* CONFIG_KEXEC */ +__initcall(export_flat_device_tree); +#endif