/* mdesc.c: Sun4V machine description handling.
*
- * Copyright (C) 2007 David S. Miller <davem@davemloft.net>
+ * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
*/
#include <linux/kernel.h>
#include <linux/types.h>
-#include <linux/bootmem.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/hypervisor.h>
#include <asm/mdesc.h>
hp->handle_size = handle_size;
}
-static struct mdesc_handle * __init mdesc_bootmem_alloc(unsigned int mdesc_size)
+static struct mdesc_handle * __init mdesc_lmb_alloc(unsigned int mdesc_size)
{
- struct mdesc_handle *hp;
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);
- hp = __alloc_bootmem(alloc_size, PAGE_SIZE, 0UL);
- if (hp)
- mdesc_handle_init(hp, handle_size, hp);
+ 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_bootmem_free(struct mdesc_handle *hp)
+static void mdesc_lmb_free(struct mdesc_handle *hp)
{
unsigned int alloc_size, handle_size = hp->handle_size;
unsigned long start, end;
}
}
-static struct mdesc_mem_ops bootmem_mdesc_ops = {
- .alloc = mdesc_bootmem_alloc,
- .free = mdesc_bootmem_free,
+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)
get_one_mondo_bits(val, &tb->nonresum_qmask, 2);
}
-void __devinit mdesc_fill_in_cpu_data(cpumask_t mask)
+void __cpuinit mdesc_fill_in_cpu_data(cpumask_t mask)
{
struct mdesc_handle *hp = mdesc_grab();
u64 mp;
cpuid = *id;
#ifdef CONFIG_SMP
- if (cpuid >= NR_CPUS)
+ 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
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;
printk("MDESC: Size is %lu bytes.\n", len);
- hp = mdesc_alloc(len, &bootmem_mdesc_ops);
+ hp = mdesc_alloc(len, &lmb_mdesc_ops);
if (hp == NULL) {
prom_printf("MDESC: alloc of %lu bytes failed.\n", len);
prom_halt();