diff options
Diffstat (limited to 'arch/ia64/sn/kernel/sn2/prominfo_proc.c')
| -rw-r--r-- | arch/ia64/sn/kernel/sn2/prominfo_proc.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/arch/ia64/sn/kernel/sn2/prominfo_proc.c b/arch/ia64/sn/kernel/sn2/prominfo_proc.c new file mode 100644 index 000000000..ec4de2b09 --- /dev/null +++ b/arch/ia64/sn/kernel/sn2/prominfo_proc.c @@ -0,0 +1,231 @@ +/* + * 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); +} |