diff options
Diffstat (limited to 'arch/sparc/kernel/mdesc.c')
| -rw-r--r-- | arch/sparc/kernel/mdesc.c | 917 |
1 files changed, 917 insertions, 0 deletions
diff --git a/arch/sparc/kernel/mdesc.c b/arch/sparc/kernel/mdesc.c new file mode 100644 index 00000000000..3c539a6d7c1 --- /dev/null +++ b/arch/sparc/kernel/mdesc.c @@ -0,0 +1,917 @@ +/* mdesc.c: Sun4V machine description handling. + * + * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net> + */ +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/lmb.h> +#include <linux/log2.h> +#include <linux/list.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/miscdevice.h> + +#include <asm/cpudata.h> +#include <asm/hypervisor.h> +#include <asm/mdesc.h> +#include <asm/prom.h> +#include <asm/oplib.h> +#include <asm/smp.h> + +/* Unlike the OBP device tree, the machine description is a full-on + * DAG. An arbitrary number of ARCs are possible from one + * node to other nodes and thus we can't use the OBP device_node + * data structure to represent these nodes inside of the kernel. + * + * Actually, it isn't even a DAG, because there are back pointers + * which create cycles in the graph. + * + * mdesc_hdr and mdesc_elem describe the layout of the data structure + * we get from the Hypervisor. + */ +struct mdesc_hdr { + u32 version; /* Transport version */ + u32 node_sz; /* node block size */ + u32 name_sz; /* name block size */ + u32 data_sz; /* data block size */ +} __attribute__((aligned(16))); + +struct mdesc_elem { + u8 tag; +#define MD_LIST_END 0x00 +#define MD_NODE 0x4e +#define MD_NODE_END 0x45 +#define MD_NOOP 0x20 +#define MD_PROP_ARC 0x61 +#define MD_PROP_VAL 0x76 +#define MD_PROP_STR 0x73 +#define MD_PROP_DATA 0x64 + u8 name_len; + u16 resv; + u32 name_offset; + union { + struct { + u32 data_len; + u32 data_offset; + } data; + u64 val; + } d; +}; + +struct mdesc_mem_ops { + struct mdesc_handle *(*alloc)(unsigned int mdesc_size); + void (*free)(struct mdesc_handle *handle); +}; + +struct mdesc_handle { + struct list_head list; + struct mdesc_mem_ops *mops; + void *self_base; + atomic_t refcnt; + unsigned int handle_size; + struct mdesc_hdr mdesc; +}; + +static void mdesc_handle_init(struct mdesc_handle *hp, + unsigned int handle_size, + void *base) +{ + BUG_ON(((unsigned long)&hp->mdesc) & (16UL - 1)); + + memset(hp, 0, handle_size); + INIT_LIST_HEAD(&hp->list); + hp->self_base = base; + atomic_set(&hp->refcnt, 1); + hp->handle_size = handle_size; +} + +static struct mdesc_handle * __init mdesc_lmb_alloc(unsigned int mdesc_size) +{ + unsigned int handle_size, alloc_size; + struct mdesc_handle *hp; + unsigned long paddr; + + handle_size = (sizeof(struct mdesc_handle) - + sizeof(struct mdesc_hdr) + + mdesc_size); + alloc_size = PAGE_ALIGN(handle_size); + + paddr = lmb_alloc(alloc_size, PAGE_SIZE); + + hp = NULL; + if (paddr) { + hp = __va(paddr); + mdesc_handle_init(hp, handle_size, hp); + } + return hp; +} + +static void mdesc_lmb_free(struct mdesc_handle *hp) +{ + unsigned int alloc_size, handle_size = hp->handle_size; + unsigned long start, end; + + BUG_ON(atomic_read(&hp->refcnt) != 0); + BUG_ON(!list_empty(&hp->list)); + + alloc_size = PAGE_ALIGN(handle_size); + + start = (unsigned long) hp; + end = start + alloc_size; + + while (start < end) { + struct page *p; + + p = virt_to_page(start); + ClearPageReserved(p); + __free_page(p); + start += PAGE_SIZE; + } +} + +static struct mdesc_mem_ops lmb_mdesc_ops = { + .alloc = mdesc_lmb_alloc, + .free = mdesc_lmb_free, +}; + +static struct mdesc_handle *mdesc_kmalloc(unsigned int mdesc_size) +{ + unsigned int handle_size; + void *base; + + handle_size = (sizeof(struct mdesc_handle) - + sizeof(struct mdesc_hdr) + + mdesc_size); + + base = kmalloc(handle_size + 15, GFP_KERNEL | __GFP_NOFAIL); + if (base) { + struct mdesc_handle *hp; + unsigned long addr; + + addr = (unsigned long)base; + addr = (addr + 15UL) & ~15UL; + hp = (struct mdesc_handle *) addr; + + mdesc_handle_init(hp, handle_size, base); + return hp; + } + + return NULL; +} + +static void mdesc_kfree(struct mdesc_handle *hp) +{ + BUG_ON(atomic_read(&hp->refcnt) != 0); + BUG_ON(!list_empty(&hp->list)); + + kfree(hp->self_base); +} + +static struct mdesc_mem_ops kmalloc_mdesc_memops = { + .alloc = mdesc_kmalloc, + .free = mdesc_kfree, +}; + +static struct mdesc_handle *mdesc_alloc(unsigned int mdesc_size, + struct mdesc_mem_ops *mops) +{ + struct mdesc_handle *hp = mops->alloc(mdesc_size); + + if (hp) + hp->mops = mops; + + return hp; +} + +static void mdesc_free(struct mdesc_handle *hp) +{ + hp->mops->free(hp); +} + +static struct mdesc_handle *cur_mdesc; +static LIST_HEAD(mdesc_zombie_list); +static DEFINE_SPINLOCK(mdesc_lock); + +struct mdesc_handle *mdesc_grab(void) +{ + struct mdesc_handle *hp; + unsigned long flags; + + spin_lock_irqsave(&mdesc_lock, flags); + hp = cur_mdesc; + if (hp) + atomic_inc(&hp->refcnt); + spin_unlock_irqrestore(&mdesc_lock, flags); + + return hp; +} +EXPORT_SYMBOL(mdesc_grab); + +void mdesc_release(struct mdesc_handle *hp) +{ + unsigned long flags; + + spin_lock_irqsave(&mdesc_lock, flags); + if (atomic_dec_and_test(&hp->refcnt)) { + list_del_init(&hp->list); + hp->mops->free(hp); + } + spin_unlock_irqrestore(&mdesc_lock, flags); +} +EXPORT_SYMBOL(mdesc_release); + +static DEFINE_MUTEX(mdesc_mutex); +static struct mdesc_notifier_client *client_list; + +void mdesc_register_notifier(struct mdesc_notifier_client *client) +{ + u64 node; + + mutex_lock(&mdesc_mutex); + client->next = client_list; + client_list = client; + + mdesc_for_each_node_by_name(cur_mdesc, node, client->node_name) + client->add(cur_mdesc, node); + + mutex_unlock(&mdesc_mutex); +} + +static const u64 *parent_cfg_handle(struct mdesc_handle *hp, u64 node) +{ + const u64 *id; + u64 a; + + id = NULL; + mdesc_for_each_arc(a, hp, node, MDESC_ARC_TYPE_BACK) { + u64 target; + + target = mdesc_arc_target(hp, a); + id = mdesc_get_property(hp, target, + "cfg-handle", NULL); + if (id) + break; + } + + return id; +} + +/* Run 'func' on nodes which are in A but not in B. */ +static void invoke_on_missing(const char *name, + struct mdesc_handle *a, + struct mdesc_handle *b, + void (*func)(struct mdesc_handle *, u64)) +{ + u64 node; + + mdesc_for_each_node_by_name(a, node, name) { + int found = 0, is_vdc_port = 0; + const char *name_prop; + const u64 *id; + u64 fnode; + + name_prop = mdesc_get_property(a, node, "name", NULL); + if (name_prop && !strcmp(name_prop, "vdc-port")) { + is_vdc_port = 1; + id = parent_cfg_handle(a, node); + } else + id = mdesc_get_property(a, node, "id", NULL); + + if (!id) { + printk(KERN_ERR "MD: Cannot find ID for %s node.\n", + (name_prop ? name_prop : name)); + continue; + } + + mdesc_for_each_node_by_name(b, fnode, name) { + const u64 *fid; + + if (is_vdc_port) { + name_prop = mdesc_get_property(b, fnode, + "name", NULL); + if (!name_prop || + strcmp(name_prop, "vdc-port")) + continue; + fid = parent_cfg_handle(b, fnode); + if (!fid) { + printk(KERN_ERR "MD: Cannot find ID " + "for vdc-port node.\n"); + continue; + } + } else + fid = mdesc_get_property(b, fnode, + "id", NULL); + + if (*id == *fid) { + found = 1; + break; + } + } + if (!found) + func(a, node); + } +} + +static void notify_one(struct mdesc_notifier_client *p, + struct mdesc_handle *old_hp, + struct mdesc_handle *new_hp) +{ + invoke_on_missing(p->node_name, old_hp, new_hp, p->remove); + invoke_on_missing(p->node_name, new_hp, old_hp, p->add); +} + +static void mdesc_notify_clients(struct mdesc_handle *old_hp, + struct mdesc_handle *new_hp) +{ + struct mdesc_notifier_client *p = client_list; + + while (p) { + notify_one(p, old_hp, new_hp); + p = p->next; + } +} + +void mdesc_update(void) +{ + unsigned long len, real_len, status; + struct mdesc_handle *hp, *orig_hp; + unsigned long flags; + + mutex_lock(&mdesc_mutex); + + (void) sun4v_mach_desc(0UL, 0UL, &len); + + hp = mdesc_alloc(len, &kmalloc_mdesc_memops); + if (!hp) { + printk(KERN_ERR "MD: mdesc alloc fails\n"); + goto out; + } + + status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len); + if (status != HV_EOK || real_len > len) { + printk(KERN_ERR "MD: mdesc reread fails with %lu\n", + status); + atomic_dec(&hp->refcnt); + mdesc_free(hp); + goto out; + } + + spin_lock_irqsave(&mdesc_lock, flags); + orig_hp = cur_mdesc; + cur_mdesc = hp; + spin_unlock_irqrestore(&mdesc_lock, flags); + + mdesc_notify_clients(orig_hp, hp); + + spin_lock_irqsave(&mdesc_lock, flags); + if (atomic_dec_and_test(&orig_hp->refcnt)) + mdesc_free(orig_hp); + else + list_add(&orig_hp->list, &mdesc_zombie_list); + spin_unlock_irqrestore(&mdesc_lock, flags); + +out: + mutex_unlock(&mdesc_mutex); +} + +static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc) +{ + return (struct mdesc_elem *) (mdesc + 1); +} + +static void *name_block(struct mdesc_hdr *mdesc) +{ + return ((void *) node_block(mdesc)) + mdesc->node_sz; +} + +static void *data_block(struct mdesc_hdr *mdesc) +{ + return ((void *) name_block(mdesc)) + mdesc->name_sz; +} + +u64 mdesc_node_by_name(struct mdesc_handle *hp, + u64 from_node, const char *name) +{ + struct mdesc_elem *ep = node_block(&hp->mdesc); + const char *names = name_block(&hp->mdesc); + u64 last_node = hp->mdesc.node_sz / 16; + u64 ret; + + if (from_node == MDESC_NODE_NULL) { + ret = from_node = 0; + } else if (from_node >= last_node) { + return MDESC_NODE_NULL; + } else { + ret = ep[from_node].d.val; + } + + while (ret < last_node) { + if (ep[ret].tag != MD_NODE) + return MDESC_NODE_NULL; + if (!strcmp(names + ep[ret].name_offset, name)) + break; + ret = ep[ret].d.val; + } + if (ret >= last_node) + ret = MDESC_NODE_NULL; + return ret; +} +EXPORT_SYMBOL(mdesc_node_by_name); + +const void *mdesc_get_property(struct mdesc_handle *hp, u64 node, + const char *name, int *lenp) +{ + const char *names = name_block(&hp->mdesc); + u64 last_node = hp->mdesc.node_sz / 16; + void *data = data_block(&hp->mdesc); + struct mdesc_elem *ep; + + if (node == MDESC_NODE_NULL || node >= last_node) + return NULL; + + ep = node_block(&hp->mdesc) + node; + ep++; + for (; ep->tag != MD_NODE_END; ep++) { + void *val = NULL; + int len = 0; + + switch (ep->tag) { + case MD_PROP_VAL: + val = &ep->d.val; + len = 8; + break; + + case MD_PROP_STR: + case MD_PROP_DATA: + val = data + ep->d.data.data_offset; + len = ep->d.data.data_len; + break; + + default: + break; + } + if (!val) + continue; + + if (!strcmp(names + ep->name_offset, name)) { + if (lenp) + *lenp = len; + return val; + } + } + + return NULL; +} +EXPORT_SYMBOL(mdesc_get_property); + +u64 mdesc_next_arc(struct mdesc_handle *hp, u64 from, const char *arc_type) +{ + struct mdesc_elem *ep, *base = node_block(&hp->mdesc); + const char *names = name_block(&hp->mdesc); + u64 last_node = hp->mdesc.node_sz / 16; + + if (from == MDESC_NODE_NULL || from >= last_node) + return MDESC_NODE_NULL; + + ep = base + from; + + ep++; + for (; ep->tag != MD_NODE_END; ep++) { + if (ep->tag != MD_PROP_ARC) + continue; + + if (strcmp(names + ep->name_offset, arc_type)) + continue; + + return ep - base; + } + + return MDESC_NODE_NULL; +} +EXPORT_SYMBOL(mdesc_next_arc); + +u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc) +{ + struct mdesc_elem *ep, *base = node_block(&hp->mdesc); + + ep = base + arc; + + return ep->d.val; +} +EXPORT_SYMBOL(mdesc_arc_target); + +const char *mdesc_node_name(struct mdesc_handle *hp, u64 node) +{ + struct mdesc_elem *ep, *base = node_block(&hp->mdesc); + const char *names = name_block(&hp->mdesc); + u64 last_node = hp->mdesc.node_sz / 16; + + if (node == MDESC_NODE_NULL || node >= last_node) + return NULL; + + ep = base + node; + if (ep->tag != MD_NODE) + return NULL; + + return names + ep->name_offset; +} +EXPORT_SYMBOL(mdesc_node_name); + +static void __init report_platform_properties(void) +{ + struct mdesc_handle *hp = mdesc_grab(); + u64 pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "platform"); + const char *s; + const u64 *v; + + if (pn == MDESC_NODE_NULL) { + prom_printf("No platform node in machine-description.\n"); + prom_halt(); + } + + s = mdesc_get_property(hp, pn, "banner-name", NULL); + printk("PLATFORM: banner-name [%s]\n", s); + s = mdesc_get_property(hp, pn, "name", NULL); + printk("PLATFORM: name [%s]\n", s); + + v = mdesc_get_property(hp, pn, "hostid", NULL); + if (v) + printk("PLATFORM: hostid [%08lx]\n", *v); + v = mdesc_get_property(hp, pn, "serial#", NULL); + if (v) + printk("PLATFORM: serial# [%08lx]\n", *v); + v = mdesc_get_property(hp, pn, "stick-frequency", NULL); + printk("PLATFORM: stick-frequency [%08lx]\n", *v); + v = mdesc_get_property(hp, pn, "mac-address", NULL); + if (v) + printk("PLATFORM: mac-address [%lx]\n", *v); + v = mdesc_get_property(hp, pn, "watchdog-resolution", NULL); + if (v) + printk("PLATFORM: watchdog-resolution [%lu ms]\n", *v); + v = mdesc_get_property(hp, pn, "watchdog-max-timeout", NULL); + if (v) + printk("PLATFORM: watchdog-max-timeout [%lu ms]\n", *v); + v = mdesc_get_property(hp, pn, "max-cpus", NULL); + if (v) + printk("PLATFORM: max-cpus [%lu]\n", *v); + +#ifdef CONFIG_SMP + { + int max_cpu, i; + + if (v) { + max_cpu = *v; + if (max_cpu > NR_CPUS) + max_cpu = NR_CPUS; + } else { + max_cpu = NR_CPUS; + } + for (i = 0; i < max_cpu; i++) + cpu_set(i, cpu_possible_map); + } +#endif + + mdesc_release(hp); +} + +static void __devinit fill_in_one_cache(cpuinfo_sparc *c, + struct mdesc_handle *hp, + u64 mp) +{ + const u64 *level = mdesc_get_property(hp, mp, "level", NULL); + const u64 *size = mdesc_get_property(hp, mp, "size", NULL); + const u64 *line_size = mdesc_get_property(hp, mp, "line-size", NULL); + const char *type; + int type_len; + + type = mdesc_get_property(hp, mp, "type", &type_len); + + switch (*level) { + case 1: + if (of_find_in_proplist(type, "instn", type_len)) { + c->icache_size = *size; + c->icache_line_size = *line_size; + } else if (of_find_in_proplist(type, "data", type_len)) { + c->dcache_size = *size; + c->dcache_line_size = *line_size; + } + break; + + case 2: + c->ecache_size = *size; + c->ecache_line_size = *line_size; + break; + + default: + break; + } + + if (*level == 1) { + u64 a; + + mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) { + u64 target = mdesc_arc_target(hp, a); + const char *name = mdesc_node_name(hp, target); + + if (!strcmp(name, "cache")) + fill_in_one_cache(c, hp, target); + } + } +} + +static void __devinit mark_core_ids(struct mdesc_handle *hp, u64 mp, + int core_id) +{ + u64 a; + + mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) { + u64 t = mdesc_arc_target(hp, a); + const char *name; + const u64 *id; + + name = mdesc_node_name(hp, t); + if (!strcmp(name, "cpu")) { + id = mdesc_get_property(hp, t, "id", NULL); + if (*id < NR_CPUS) + cpu_data(*id).core_id = core_id; + } else { + u64 j; + + mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_BACK) { + u64 n = mdesc_arc_target(hp, j); + const char *n_name; + + n_name = mdesc_node_name(hp, n); + if (strcmp(n_name, "cpu")) + continue; + + id = mdesc_get_property(hp, n, "id", NULL); + if (*id < NR_CPUS) + cpu_data(*id).core_id = core_id; + } + } + } +} + +static void __devinit set_core_ids(struct mdesc_handle *hp) +{ + int idx; + u64 mp; + + idx = 1; + mdesc_for_each_node_by_name(hp, mp, "cache") { + const u64 *level; + const char *type; + int len; + + level = mdesc_get_property(hp, mp, "level", NULL); + if (*level != 1) + continue; + + type = mdesc_get_property(hp, mp, "type", &len); + if (!of_find_in_proplist(type, "instn", len)) + continue; + + mark_core_ids(hp, mp, idx); + + idx++; + } +} + +static void __devinit mark_proc_ids(struct mdesc_handle *hp, u64 mp, + int proc_id) +{ + u64 a; + + mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_BACK) { + u64 t = mdesc_arc_target(hp, a); + const char *name; + const u64 *id; + + name = mdesc_node_name(hp, t); + if (strcmp(name, "cpu")) + continue; + + id = mdesc_get_property(hp, t, "id", NULL); + if (*id < NR_CPUS) + cpu_data(*id).proc_id = proc_id; + } +} + +static void __devinit __set_proc_ids(struct mdesc_handle *hp, + const char *exec_unit_name) +{ + int idx; + u64 mp; + + idx = 0; + mdesc_for_each_node_by_name(hp, mp, exec_unit_name) { + const char *type; + int len; + + type = mdesc_get_property(hp, mp, "type", &len); + if (!of_find_in_proplist(type, "int", len) && + !of_find_in_proplist(type, "integer", len)) + continue; + + mark_proc_ids(hp, mp, idx); + + idx++; + } +} + +static void __devinit set_proc_ids(struct mdesc_handle *hp) +{ + __set_proc_ids(hp, "exec_unit"); + __set_proc_ids(hp, "exec-unit"); +} + +static void __devinit get_one_mondo_bits(const u64 *p, unsigned int *mask, + unsigned char def) +{ + u64 val; + + if (!p) + goto use_default; + val = *p; + + if (!val || val >= 64) + goto use_default; + + *mask = ((1U << val) * 64U) - 1U; + return; + +use_default: + *mask = ((1U << def) * 64U) - 1U; +} + +static void __devinit get_mondo_data(struct mdesc_handle *hp, u64 mp, + struct trap_per_cpu *tb) +{ + const u64 *val; + + val = mdesc_get_property(hp, mp, "q-cpu-mondo-#bits", NULL); + get_one_mondo_bits(val, &tb->cpu_mondo_qmask, 7); + + val = mdesc_get_property(hp, mp, "q-dev-mondo-#bits", NULL); + get_one_mondo_bits(val, &tb->dev_mondo_qmask, 7); + + val = mdesc_get_property(hp, mp, "q-resumable-#bits", NULL); + get_one_mondo_bits(val, &tb->resum_qmask, 6); + + val = mdesc_get_property(hp, mp, "q-nonresumable-#bits", NULL); + get_one_mondo_bits(val, &tb->nonresum_qmask, 2); +} + +void __cpuinit mdesc_fill_in_cpu_data(cpumask_t mask) +{ + struct mdesc_handle *hp = mdesc_grab(); + u64 mp; + + ncpus_probed = 0; + mdesc_for_each_node_by_name(hp, mp, "cpu") { + const u64 *id = mdesc_get_property(hp, mp, "id", NULL); + const u64 *cfreq = mdesc_get_property(hp, mp, "clock-frequency", NULL); + struct trap_per_cpu *tb; + cpuinfo_sparc *c; + int cpuid; + u64 a; + + ncpus_probed++; + + cpuid = *id; + +#ifdef CONFIG_SMP + if (cpuid >= NR_CPUS) { + printk(KERN_WARNING "Ignoring CPU %d which is " + ">= NR_CPUS (%d)\n", + cpuid, NR_CPUS); + continue; + } + if (!cpu_isset(cpuid, mask)) + continue; +#else + /* On uniprocessor we only want the values for the + * real physical cpu the kernel booted onto, however + * cpu_data() only has one entry at index 0. + */ + if (cpuid != real_hard_smp_processor_id()) + continue; + cpuid = 0; +#endif + + c = &cpu_data(cpuid); + c->clock_tick = *cfreq; + + tb = &trap_block[cpuid]; + get_mondo_data(hp, mp, tb); + + mdesc_for_each_arc(a, hp, mp, MDESC_ARC_TYPE_FWD) { + u64 j, t = mdesc_arc_target(hp, a); + const char *t_name; + + t_name = mdesc_node_name(hp, t); + if (!strcmp(t_name, "cache")) { + fill_in_one_cache(c, hp, t); + continue; + } + + mdesc_for_each_arc(j, hp, t, MDESC_ARC_TYPE_FWD) { + u64 n = mdesc_arc_target(hp, j); + const char *n_name; + + n_name = mdesc_node_name(hp, n); + if (!strcmp(n_name, "cache")) + fill_in_one_cache(c, hp, n); + } + } + +#ifdef CONFIG_SMP + cpu_set(cpuid, cpu_present_map); +#endif + + c->core_id = 0; + c->proc_id = -1; + } + +#ifdef CONFIG_SMP + sparc64_multi_core = 1; +#endif + + set_core_ids(hp); + set_proc_ids(hp); + + smp_fill_in_sib_core_maps(); + + mdesc_release(hp); +} + +static ssize_t mdesc_read(struct file *file, char __user *buf, + size_t len, loff_t *offp) +{ + struct mdesc_handle *hp = mdesc_grab(); + int err; + + if (!hp) + return -ENODEV; + + err = hp->handle_size; + if (len < hp->handle_size) + err = -EMSGSIZE; + else if (copy_to_user(buf, &hp->mdesc, hp->handle_size)) + err = -EFAULT; + mdesc_release(hp); + + return err; +} + +static const struct file_operations mdesc_fops = { + .read = mdesc_read, + .owner = THIS_MODULE, +}; + +static struct miscdevice mdesc_misc = { + .minor = MISC_DYNAMIC_MINOR, + .name = "mdesc", + .fops = &mdesc_fops, +}; + +static int __init mdesc_misc_init(void) +{ + return misc_register(&mdesc_misc); +} + +__initcall(mdesc_misc_init); + +void __init sun4v_mdesc_init(void) +{ + struct mdesc_handle *hp; + unsigned long len, real_len, status; + cpumask_t mask; + + (void) sun4v_mach_desc(0UL, 0UL, &len); + + printk("MDESC: Size is %lu bytes.\n", len); + + hp = mdesc_alloc(len, &lmb_mdesc_ops); + if (hp == NULL) { + prom_printf("MDESC: alloc of %lu bytes failed.\n", len); + prom_halt(); + } + + status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len); + if (status != HV_EOK || real_len > len) { + prom_printf("sun4v_mach_desc fails, err(%lu), " + "len(%lu), real_len(%lu)\n", + status, len, real_len); + mdesc_free(hp); + prom_halt(); + } + + cur_mdesc = hp; + + report_platform_properties(); + + cpus_setall(mask); + mdesc_fill_in_cpu_data(mask); +} |