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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 05:48:40 +00:00
944 lines
20 KiB
C
944 lines
20 KiB
C
/* mdesc.c: Sun4V machine description handling.
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*
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* Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/lmb.h>
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#include <linux/log2.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/miscdevice.h>
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#include <asm/cpudata.h>
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#include <asm/hypervisor.h>
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#include <asm/mdesc.h>
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#include <asm/prom.h>
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#include <asm/oplib.h>
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#include <asm/smp.h>
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/* Unlike the OBP device tree, the machine description is a full-on
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* DAG. An arbitrary number of ARCs are possible from one
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* node to other nodes and thus we can't use the OBP device_node
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* data structure to represent these nodes inside of the kernel.
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*
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* Actually, it isn't even a DAG, because there are back pointers
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* which create cycles in the graph.
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*
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* mdesc_hdr and mdesc_elem describe the layout of the data structure
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* we get from the Hypervisor.
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*/
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struct mdesc_hdr {
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u32 version; /* Transport version */
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u32 node_sz; /* node block size */
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u32 name_sz; /* name block size */
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u32 data_sz; /* data block size */
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} __attribute__((aligned(16)));
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struct mdesc_elem {
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u8 tag;
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#define MD_LIST_END 0x00
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#define MD_NODE 0x4e
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#define MD_NODE_END 0x45
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#define MD_NOOP 0x20
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#define MD_PROP_ARC 0x61
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#define MD_PROP_VAL 0x76
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#define MD_PROP_STR 0x73
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#define MD_PROP_DATA 0x64
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u8 name_len;
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u16 resv;
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u32 name_offset;
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union {
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struct {
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u32 data_len;
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u32 data_offset;
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} data;
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u64 val;
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} d;
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};
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struct mdesc_mem_ops {
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struct mdesc_handle *(*alloc)(unsigned int mdesc_size);
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void (*free)(struct mdesc_handle *handle);
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};
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struct mdesc_handle {
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struct list_head list;
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struct mdesc_mem_ops *mops;
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void *self_base;
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atomic_t refcnt;
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unsigned int handle_size;
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struct mdesc_hdr mdesc;
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};
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static void mdesc_handle_init(struct mdesc_handle *hp,
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unsigned int handle_size,
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void *base)
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{
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BUG_ON(((unsigned long)&hp->mdesc) & (16UL - 1));
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memset(hp, 0, handle_size);
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INIT_LIST_HEAD(&hp->list);
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hp->self_base = base;
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atomic_set(&hp->refcnt, 1);
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hp->handle_size = handle_size;
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}
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static struct mdesc_handle * __init mdesc_lmb_alloc(unsigned int mdesc_size)
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{
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unsigned int handle_size, alloc_size;
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struct mdesc_handle *hp;
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unsigned long paddr;
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handle_size = (sizeof(struct mdesc_handle) -
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sizeof(struct mdesc_hdr) +
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mdesc_size);
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alloc_size = PAGE_ALIGN(handle_size);
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paddr = lmb_alloc(alloc_size, PAGE_SIZE);
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hp = NULL;
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if (paddr) {
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hp = __va(paddr);
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mdesc_handle_init(hp, handle_size, hp);
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}
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return hp;
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}
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static void mdesc_lmb_free(struct mdesc_handle *hp)
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{
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unsigned int alloc_size, handle_size = hp->handle_size;
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unsigned long start, end;
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BUG_ON(atomic_read(&hp->refcnt) != 0);
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BUG_ON(!list_empty(&hp->list));
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alloc_size = PAGE_ALIGN(handle_size);
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start = (unsigned long) hp;
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end = start + alloc_size;
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while (start < end) {
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struct page *p;
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p = virt_to_page(start);
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ClearPageReserved(p);
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__free_page(p);
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start += PAGE_SIZE;
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}
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}
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static struct mdesc_mem_ops lmb_mdesc_ops = {
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.alloc = mdesc_lmb_alloc,
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.free = mdesc_lmb_free,
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};
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static struct mdesc_handle *mdesc_kmalloc(unsigned int mdesc_size)
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{
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unsigned int handle_size;
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void *base;
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handle_size = (sizeof(struct mdesc_handle) -
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sizeof(struct mdesc_hdr) +
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mdesc_size);
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base = kmalloc(handle_size + 15, GFP_KERNEL | __GFP_NOFAIL);
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if (base) {
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struct mdesc_handle *hp;
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unsigned long addr;
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addr = (unsigned long)base;
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addr = (addr + 15UL) & ~15UL;
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hp = (struct mdesc_handle *) addr;
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mdesc_handle_init(hp, handle_size, base);
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return hp;
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}
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return NULL;
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}
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static void mdesc_kfree(struct mdesc_handle *hp)
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{
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BUG_ON(atomic_read(&hp->refcnt) != 0);
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BUG_ON(!list_empty(&hp->list));
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kfree(hp->self_base);
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}
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static struct mdesc_mem_ops kmalloc_mdesc_memops = {
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.alloc = mdesc_kmalloc,
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.free = mdesc_kfree,
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};
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static struct mdesc_handle *mdesc_alloc(unsigned int mdesc_size,
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struct mdesc_mem_ops *mops)
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{
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struct mdesc_handle *hp = mops->alloc(mdesc_size);
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if (hp)
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hp->mops = mops;
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return hp;
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}
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static void mdesc_free(struct mdesc_handle *hp)
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{
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hp->mops->free(hp);
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}
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static struct mdesc_handle *cur_mdesc;
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static LIST_HEAD(mdesc_zombie_list);
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static DEFINE_SPINLOCK(mdesc_lock);
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struct mdesc_handle *mdesc_grab(void)
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{
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struct mdesc_handle *hp;
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unsigned long flags;
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spin_lock_irqsave(&mdesc_lock, flags);
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hp = cur_mdesc;
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if (hp)
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atomic_inc(&hp->refcnt);
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spin_unlock_irqrestore(&mdesc_lock, flags);
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return hp;
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}
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EXPORT_SYMBOL(mdesc_grab);
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void mdesc_release(struct mdesc_handle *hp)
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{
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unsigned long flags;
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spin_lock_irqsave(&mdesc_lock, flags);
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if (atomic_dec_and_test(&hp->refcnt)) {
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list_del_init(&hp->list);
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hp->mops->free(hp);
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}
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spin_unlock_irqrestore(&mdesc_lock, flags);
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}
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EXPORT_SYMBOL(mdesc_release);
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static DEFINE_MUTEX(mdesc_mutex);
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static struct mdesc_notifier_client *client_list;
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void mdesc_register_notifier(struct mdesc_notifier_client *client)
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{
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u64 node;
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mutex_lock(&mdesc_mutex);
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client->next = client_list;
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client_list = client;
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mdesc_for_each_node_by_name(cur_mdesc, node, client->node_name)
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client->add(cur_mdesc, node);
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mutex_unlock(&mdesc_mutex);
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}
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static const u64 *parent_cfg_handle(struct mdesc_handle *hp, u64 node)
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{
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const u64 *id;
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u64 a;
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id = NULL;
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mdesc_for_each_arc(a, hp, node, MDESC_ARC_TYPE_BACK) {
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u64 target;
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target = mdesc_arc_target(hp, a);
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id = mdesc_get_property(hp, target,
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"cfg-handle", NULL);
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if (id)
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break;
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}
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return id;
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}
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/* Run 'func' on nodes which are in A but not in B. */
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static void invoke_on_missing(const char *name,
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struct mdesc_handle *a,
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struct mdesc_handle *b,
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void (*func)(struct mdesc_handle *, u64))
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{
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u64 node;
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mdesc_for_each_node_by_name(a, node, name) {
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int found = 0, is_vdc_port = 0;
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const char *name_prop;
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const u64 *id;
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u64 fnode;
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name_prop = mdesc_get_property(a, node, "name", NULL);
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if (name_prop && !strcmp(name_prop, "vdc-port")) {
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is_vdc_port = 1;
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id = parent_cfg_handle(a, node);
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} else
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id = mdesc_get_property(a, node, "id", NULL);
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if (!id) {
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printk(KERN_ERR "MD: Cannot find ID for %s node.\n",
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(name_prop ? name_prop : name));
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continue;
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}
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mdesc_for_each_node_by_name(b, fnode, name) {
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const u64 *fid;
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if (is_vdc_port) {
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name_prop = mdesc_get_property(b, fnode,
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"name", NULL);
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if (!name_prop ||
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strcmp(name_prop, "vdc-port"))
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continue;
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fid = parent_cfg_handle(b, fnode);
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if (!fid) {
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printk(KERN_ERR "MD: Cannot find ID "
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"for vdc-port node.\n");
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continue;
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}
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} else
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fid = mdesc_get_property(b, fnode,
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"id", NULL);
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if (*id == *fid) {
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found = 1;
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break;
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}
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}
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if (!found)
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func(a, node);
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}
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}
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static void notify_one(struct mdesc_notifier_client *p,
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struct mdesc_handle *old_hp,
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struct mdesc_handle *new_hp)
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{
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invoke_on_missing(p->node_name, old_hp, new_hp, p->remove);
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invoke_on_missing(p->node_name, new_hp, old_hp, p->add);
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}
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static void mdesc_notify_clients(struct mdesc_handle *old_hp,
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struct mdesc_handle *new_hp)
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{
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struct mdesc_notifier_client *p = client_list;
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while (p) {
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notify_one(p, old_hp, new_hp);
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p = p->next;
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}
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}
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void mdesc_update(void)
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{
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unsigned long len, real_len, status;
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struct mdesc_handle *hp, *orig_hp;
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unsigned long flags;
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mutex_lock(&mdesc_mutex);
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(void) sun4v_mach_desc(0UL, 0UL, &len);
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hp = mdesc_alloc(len, &kmalloc_mdesc_memops);
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if (!hp) {
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printk(KERN_ERR "MD: mdesc alloc fails\n");
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goto out;
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}
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status = sun4v_mach_desc(__pa(&hp->mdesc), len, &real_len);
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if (status != HV_EOK || real_len > len) {
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printk(KERN_ERR "MD: mdesc reread fails with %lu\n",
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status);
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atomic_dec(&hp->refcnt);
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mdesc_free(hp);
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goto out;
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}
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spin_lock_irqsave(&mdesc_lock, flags);
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orig_hp = cur_mdesc;
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cur_mdesc = hp;
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spin_unlock_irqrestore(&mdesc_lock, flags);
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mdesc_notify_clients(orig_hp, hp);
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spin_lock_irqsave(&mdesc_lock, flags);
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if (atomic_dec_and_test(&orig_hp->refcnt))
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mdesc_free(orig_hp);
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else
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list_add(&orig_hp->list, &mdesc_zombie_list);
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spin_unlock_irqrestore(&mdesc_lock, flags);
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out:
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mutex_unlock(&mdesc_mutex);
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}
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static struct mdesc_elem *node_block(struct mdesc_hdr *mdesc)
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{
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return (struct mdesc_elem *) (mdesc + 1);
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}
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static void *name_block(struct mdesc_hdr *mdesc)
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{
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return ((void *) node_block(mdesc)) + mdesc->node_sz;
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}
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static void *data_block(struct mdesc_hdr *mdesc)
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{
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return ((void *) name_block(mdesc)) + mdesc->name_sz;
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}
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u64 mdesc_node_by_name(struct mdesc_handle *hp,
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u64 from_node, const char *name)
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{
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struct mdesc_elem *ep = node_block(&hp->mdesc);
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const char *names = name_block(&hp->mdesc);
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u64 last_node = hp->mdesc.node_sz / 16;
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u64 ret;
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if (from_node == MDESC_NODE_NULL) {
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ret = from_node = 0;
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} else if (from_node >= last_node) {
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return MDESC_NODE_NULL;
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} else {
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ret = ep[from_node].d.val;
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}
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while (ret < last_node) {
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if (ep[ret].tag != MD_NODE)
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return MDESC_NODE_NULL;
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if (!strcmp(names + ep[ret].name_offset, name))
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break;
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ret = ep[ret].d.val;
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}
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if (ret >= last_node)
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ret = MDESC_NODE_NULL;
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return ret;
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}
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EXPORT_SYMBOL(mdesc_node_by_name);
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const void *mdesc_get_property(struct mdesc_handle *hp, u64 node,
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const char *name, int *lenp)
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{
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const char *names = name_block(&hp->mdesc);
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u64 last_node = hp->mdesc.node_sz / 16;
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void *data = data_block(&hp->mdesc);
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struct mdesc_elem *ep;
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if (node == MDESC_NODE_NULL || node >= last_node)
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return NULL;
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ep = node_block(&hp->mdesc) + node;
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ep++;
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for (; ep->tag != MD_NODE_END; ep++) {
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void *val = NULL;
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int len = 0;
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switch (ep->tag) {
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case MD_PROP_VAL:
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val = &ep->d.val;
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len = 8;
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break;
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case MD_PROP_STR:
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case MD_PROP_DATA:
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val = data + ep->d.data.data_offset;
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len = ep->d.data.data_len;
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break;
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default:
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break;
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}
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if (!val)
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continue;
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if (!strcmp(names + ep->name_offset, name)) {
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if (lenp)
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*lenp = len;
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return val;
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}
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}
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return NULL;
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}
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EXPORT_SYMBOL(mdesc_get_property);
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u64 mdesc_next_arc(struct mdesc_handle *hp, u64 from, const char *arc_type)
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{
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struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
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const char *names = name_block(&hp->mdesc);
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u64 last_node = hp->mdesc.node_sz / 16;
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if (from == MDESC_NODE_NULL || from >= last_node)
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return MDESC_NODE_NULL;
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ep = base + from;
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ep++;
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for (; ep->tag != MD_NODE_END; ep++) {
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if (ep->tag != MD_PROP_ARC)
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continue;
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if (strcmp(names + ep->name_offset, arc_type))
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continue;
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return ep - base;
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}
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return MDESC_NODE_NULL;
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}
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EXPORT_SYMBOL(mdesc_next_arc);
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u64 mdesc_arc_target(struct mdesc_handle *hp, u64 arc)
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{
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struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
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ep = base + arc;
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return ep->d.val;
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}
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EXPORT_SYMBOL(mdesc_arc_target);
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const char *mdesc_node_name(struct mdesc_handle *hp, u64 node)
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{
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struct mdesc_elem *ep, *base = node_block(&hp->mdesc);
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const char *names = name_block(&hp->mdesc);
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u64 last_node = hp->mdesc.node_sz / 16;
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if (node == MDESC_NODE_NULL || node >= last_node)
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return NULL;
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ep = base + node;
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if (ep->tag != MD_NODE)
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return NULL;
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return names + ep->name_offset;
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}
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EXPORT_SYMBOL(mdesc_node_name);
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static void __init report_platform_properties(void)
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{
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struct mdesc_handle *hp = mdesc_grab();
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u64 pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "platform");
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const char *s;
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const u64 *v;
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if (pn == MDESC_NODE_NULL) {
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prom_printf("No platform node in machine-description.\n");
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prom_halt();
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}
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s = mdesc_get_property(hp, pn, "banner-name", NULL);
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printk("PLATFORM: banner-name [%s]\n", s);
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s = mdesc_get_property(hp, pn, "name", NULL);
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printk("PLATFORM: name [%s]\n", s);
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v = mdesc_get_property(hp, pn, "hostid", NULL);
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if (v)
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printk("PLATFORM: hostid [%08llx]\n", *v);
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v = mdesc_get_property(hp, pn, "serial#", NULL);
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if (v)
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printk("PLATFORM: serial# [%08llx]\n", *v);
|
|
v = mdesc_get_property(hp, pn, "stick-frequency", NULL);
|
|
printk("PLATFORM: stick-frequency [%08llx]\n", *v);
|
|
v = mdesc_get_property(hp, pn, "mac-address", NULL);
|
|
if (v)
|
|
printk("PLATFORM: mac-address [%llx]\n", *v);
|
|
v = mdesc_get_property(hp, pn, "watchdog-resolution", NULL);
|
|
if (v)
|
|
printk("PLATFORM: watchdog-resolution [%llu ms]\n", *v);
|
|
v = mdesc_get_property(hp, pn, "watchdog-max-timeout", NULL);
|
|
if (v)
|
|
printk("PLATFORM: watchdog-max-timeout [%llu ms]\n", *v);
|
|
v = mdesc_get_property(hp, pn, "max-cpus", NULL);
|
|
if (v)
|
|
printk("PLATFORM: max-cpus [%llu]\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++)
|
|
set_cpu_possible(i, true);
|
|
}
|
|
#endif
|
|
|
|
mdesc_release(hp);
|
|
}
|
|
|
|
static void __cpuinit 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 __cpuinit 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 __cpuinit 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 __cpuinit 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 __cpuinit __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 __cpuinit set_proc_ids(struct mdesc_handle *hp)
|
|
{
|
|
__set_proc_ids(hp, "exec_unit");
|
|
__set_proc_ids(hp, "exec-unit");
|
|
}
|
|
|
|
static void __cpuinit 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 __cpuinit 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);
|
|
}
|
|
|
|
static void * __cpuinit mdesc_iterate_over_cpus(void *(*func)(struct mdesc_handle *, u64, int, void *), void *arg, cpumask_t *mask)
|
|
{
|
|
struct mdesc_handle *hp = mdesc_grab();
|
|
void *ret = NULL;
|
|
u64 mp;
|
|
|
|
mdesc_for_each_node_by_name(hp, mp, "cpu") {
|
|
const u64 *id = mdesc_get_property(hp, mp, "id", NULL);
|
|
int 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;
|
|
#endif
|
|
|
|
ret = func(hp, mp, cpuid, arg);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
out:
|
|
mdesc_release(hp);
|
|
return ret;
|
|
}
|
|
|
|
static void * __cpuinit record_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid, void *arg)
|
|
{
|
|
ncpus_probed++;
|
|
#ifdef CONFIG_SMP
|
|
set_cpu_present(cpuid, true);
|
|
#endif
|
|
return NULL;
|
|
}
|
|
|
|
void __cpuinit mdesc_populate_present_mask(cpumask_t *mask)
|
|
{
|
|
if (tlb_type != hypervisor)
|
|
return;
|
|
|
|
ncpus_probed = 0;
|
|
mdesc_iterate_over_cpus(record_one_cpu, NULL, mask);
|
|
}
|
|
|
|
static void * __cpuinit fill_in_one_cpu(struct mdesc_handle *hp, u64 mp, int cpuid, void *arg)
|
|
{
|
|
const u64 *cfreq = mdesc_get_property(hp, mp, "clock-frequency", NULL);
|
|
struct trap_per_cpu *tb;
|
|
cpuinfo_sparc *c;
|
|
u64 a;
|
|
|
|
#ifndef CONFIG_SMP
|
|
/* 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())
|
|
return NULL;
|
|
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);
|
|
}
|
|
}
|
|
|
|
c->core_id = 0;
|
|
c->proc_id = -1;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void __cpuinit mdesc_fill_in_cpu_data(cpumask_t *mask)
|
|
{
|
|
struct mdesc_handle *hp;
|
|
|
|
mdesc_iterate_over_cpus(fill_in_one_cpu, NULL, mask);
|
|
|
|
#ifdef CONFIG_SMP
|
|
sparc64_multi_core = 1;
|
|
#endif
|
|
|
|
hp = mdesc_grab();
|
|
|
|
set_core_ids(hp);
|
|
set_proc_ids(hp);
|
|
|
|
mdesc_release(hp);
|
|
|
|
smp_fill_in_sib_core_maps();
|
|
}
|
|
|
|
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;
|
|
|
|
(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();
|
|
}
|