| /* mdesc.c: Sun4V machine description handling. |
| * |
| * Copyright (C) 2007 David S. Miller <davem@davemloft.net> |
| */ |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/bootmem.h> |
| #include <linux/log2.h> |
| #include <linux/list.h> |
| #include <linux/slab.h> |
| #include <linux/mm.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_bootmem_alloc(unsigned int mdesc_size) |
| { |
| struct mdesc_handle *hp; |
| unsigned int handle_size, alloc_size; |
| |
| handle_size = (sizeof(struct mdesc_handle) - |
| sizeof(struct mdesc_hdr) + |
| mdesc_size); |
| alloc_size = PAGE_ALIGN(handle_size); |
| |
| hp = __alloc_bootmem(alloc_size, PAGE_SIZE, 0UL); |
| if (hp) |
| mdesc_handle_init(hp, handle_size, hp); |
| |
| return hp; |
| } |
| |
| static void mdesc_bootmem_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 bootmem_mdesc_ops = { |
| .alloc = mdesc_bootmem_alloc, |
| .free = mdesc_bootmem_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 __devinit 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) |
| 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); |
| } |
| |
| 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, &bootmem_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); |
| } |