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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1999,2001-2004, 2006 Silicon Graphics, Inc. All Rights Reserved.
*
* Module to export the system's Firmware Interface Tables, including
* PROM revision numbers and banners, in /proc
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/nodemask.h>
#include <asm/io.h>
#include <asm/sn/sn_sal.h>
#include <asm/sn/sn_cpuid.h>
#include <asm/sn/addrs.h>
MODULE_DESCRIPTION("PROM version reporting for /proc");
MODULE_AUTHOR("Chad Talbott");
MODULE_LICENSE("GPL");
/* Standard Intel FIT entry types */
#define FIT_ENTRY_FIT_HEADER 0x00 /* FIT header entry */
#define FIT_ENTRY_PAL_B 0x01 /* PAL_B entry */
/* Entries 0x02 through 0x0D reserved by Intel */
#define FIT_ENTRY_PAL_A_PROC 0x0E /* Processor-specific PAL_A entry */
#define FIT_ENTRY_PAL_A 0x0F /* PAL_A entry, same as... */
#define FIT_ENTRY_PAL_A_GEN 0x0F /* ...Generic PAL_A entry */
#define FIT_ENTRY_UNUSED 0x7F /* Unused (reserved by Intel?) */
/* OEM-defined entries range from 0x10 to 0x7E. */
#define FIT_ENTRY_SAL_A 0x10 /* SAL_A entry */
#define FIT_ENTRY_SAL_B 0x11 /* SAL_B entry */
#define FIT_ENTRY_SALRUNTIME 0x12 /* SAL runtime entry */
#define FIT_ENTRY_EFI 0x1F /* EFI entry */
#define FIT_ENTRY_FPSWA 0x20 /* embedded fpswa entry */
#define FIT_ENTRY_VMLINUX 0x21 /* embedded vmlinux entry */
#define FIT_MAJOR_SHIFT (32 + 8)
#define FIT_MAJOR_MASK ((1 << 8) - 1)
#define FIT_MINOR_SHIFT 32
#define FIT_MINOR_MASK ((1 << 8) - 1)
#define FIT_MAJOR(q) \
((unsigned) ((q) >> FIT_MAJOR_SHIFT) & FIT_MAJOR_MASK)
#define FIT_MINOR(q) \
((unsigned) ((q) >> FIT_MINOR_SHIFT) & FIT_MINOR_MASK)
#define FIT_TYPE_SHIFT (32 + 16)
#define FIT_TYPE_MASK ((1 << 7) - 1)
#define FIT_TYPE(q) \
((unsigned) ((q) >> FIT_TYPE_SHIFT) & FIT_TYPE_MASK)
struct fit_type_map_t {
unsigned char type;
const char *name;
};
static const struct fit_type_map_t fit_entry_types[] = {
{FIT_ENTRY_FIT_HEADER, "FIT Header"},
{FIT_ENTRY_PAL_A_GEN, "Generic PAL_A"},
{FIT_ENTRY_PAL_A_PROC, "Processor-specific PAL_A"},
{FIT_ENTRY_PAL_A, "PAL_A"},
{FIT_ENTRY_PAL_B, "PAL_B"},
{FIT_ENTRY_SAL_A, "SAL_A"},
{FIT_ENTRY_SAL_B, "SAL_B"},
{FIT_ENTRY_SALRUNTIME, "SAL runtime"},
{FIT_ENTRY_EFI, "EFI"},
{FIT_ENTRY_VMLINUX, "Embedded Linux"},
{FIT_ENTRY_FPSWA, "Embedded FPSWA"},
{FIT_ENTRY_UNUSED, "Unused"},
{0xff, "Error"},
};
static const char *fit_type_name(unsigned char type)
{
struct fit_type_map_t const *mapp;
for (mapp = fit_entry_types; mapp->type != 0xff; mapp++)
if (type == mapp->type)
return mapp->name;
if ((type > FIT_ENTRY_PAL_A) && (type < FIT_ENTRY_UNUSED))
return "OEM type";
if ((type > FIT_ENTRY_PAL_B) && (type < FIT_ENTRY_PAL_A))
return "Reserved";
return "Unknown type";
}
static int
get_fit_entry(unsigned long nasid, int index, unsigned long *fentry,
char *banner, int banlen)
{
return ia64_sn_get_fit_compt(nasid, index, fentry, banner, banlen);
}
/*
* These two routines display the FIT table for each node.
*/
static void dump_fit_entry(struct seq_file *m, unsigned long *fentry)
{
unsigned type;
type = FIT_TYPE(fentry[1]);
seq_printf(m, "%02x %-25s %x.%02x %016lx %u\n",
type,
fit_type_name(type),
FIT_MAJOR(fentry[1]), FIT_MINOR(fentry[1]),
fentry[0],
/* mult by sixteen to get size in bytes */
(unsigned)(fentry[1] & 0xffffff) * 16);
}
/*
* We assume that the fit table will be small enough that we can print
* the whole thing into one page. (This is true for our default 16kB
* pages -- each entry is about 60 chars wide when printed.) I read
* somewhere that the maximum size of the FIT is 128 entries, so we're
* OK except for 4kB pages (and no one is going to do that on SN
* anyway).
*/
static int proc_fit_show(struct seq_file *m, void *v)
{
unsigned long nasid = (unsigned long)m->private;
unsigned long fentry[2];
int index;
for (index=0;;index++) {
BUG_ON(index * 60 > PAGE_SIZE);
if (get_fit_entry(nasid, index, fentry, NULL, 0))
break;
dump_fit_entry(m, fentry);
}
return 0;
}
static int proc_fit_open(struct inode *inode, struct file *file)
{
return single_open(file, proc_fit_show, PDE_DATA(inode));
}
static const struct file_operations proc_fit_fops = {
.open = proc_fit_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int proc_version_show(struct seq_file *m, void *v)
{
unsigned long nasid = (unsigned long)m->private;
unsigned long fentry[2];
char banner[128];
int index;
for (index = 0; ; index++) {
if (get_fit_entry(nasid, index, fentry, banner,
sizeof(banner)))
return 0;
if (FIT_TYPE(fentry[1]) == FIT_ENTRY_SAL_A)
break;
}
seq_printf(m, "%x.%02x\n", FIT_MAJOR(fentry[1]), FIT_MINOR(fentry[1]));
if (banner[0])
seq_printf(m, "%s\n", banner);
return 0;
}
static int proc_version_open(struct inode *inode, struct file *file)
{
return single_open(file, proc_version_show, PDE_DATA(inode));
}
static const struct file_operations proc_version_fops = {
.open = proc_version_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/* module entry points */
int __init prominfo_init(void);
void __exit prominfo_exit(void);
module_init(prominfo_init);
module_exit(prominfo_exit);
#define NODE_NAME_LEN 11
int __init prominfo_init(void)
{
struct proc_dir_entry *sgi_prominfo_entry;
cnodeid_t cnodeid;
if (!ia64_platform_is("sn2"))
return 0;
sgi_prominfo_entry = proc_mkdir("sgi_prominfo", NULL);
if (!sgi_prominfo_entry)
return -ENOMEM;
for_each_online_node(cnodeid) {
struct proc_dir_entry *dir;
unsigned long nasid;
char name[NODE_NAME_LEN];
sprintf(name, "node%d", cnodeid);
dir = proc_mkdir(name, sgi_prominfo_entry);
if (!dir)
continue;
nasid = cnodeid_to_nasid(cnodeid);
proc_create_data("fit", 0, dir,
&proc_fit_fops, (void *)nasid);
proc_create_data("version", 0, dir,
&proc_version_fops, (void *)nasid);
}
return 0;
}
void __exit prominfo_exit(void)
{
remove_proc_subtree("sgi_prominfo", NULL);
}
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