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/*
* linux/ibcs/sysi86.c
*
* Copyright 1994, 1995 Mike Jagdis <jaggy@purplet.demon.co.uk>
*
* $Id: sysi86.c,v 1.7 1997/05/13 19:56:30 jaggy Exp $
* $Source: /usr/CVS/ibcs/iBCSemul/sysi86.c,v $
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/version.h>
#include <asm/segment.h>
#ifndef KERNEL_DS
#include <linux/config.h>
#endif
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/fcntl.h>
#include <asm/system.h>
#include <linux/fs.h>
#include <linux/sys.h>
#include <ibcs/ibcs.h>
#ifdef IBCS_TRACE
#include <ibcs/trace.h>
#endif
/* The sysi86() call is used for machine specific functions. Only the
* most basic are implemented here.
*/
#define SI86SWPI 1 /* General swap functions. */
#define SI86SYM 2 /* Get symbol table */
#define SI86CONF 4 /* Get configuration table */
#define SI86BOOT 5 /* Get timestamp and name of program
* booted.
*/
#define SI86DMM 7 /* Double-map data segment for
* read/write/execute support
*/
#define SI86AUTO 9 /* Was an auto-config boot done? */
#define SI86EDT 10 /* Copy contents of EDT to user */
#define SI86SWAP 12 /* Declare swap space */
#define SI86FPHW 40 /* what (if any?) floating-point hardware */
# define FP_NO 0 /* No fp at all */
# define FP_SW 1 /* using emulator */
# define FP_HW 2 /* using hardware */
# define FP_287 2 /* using a 287 */
# define FP_387 3 /* using a 387 */
#define GRNON 52 /* set green light to solid on state */
#define GRNFLASH 53 /* start green light flashing */
#define STIME 54 /* set internal time */
#define SETNAME 56 /* rename the system */
#define RNVR 58 /* read NVRAM */
#define WNVR 59 /* write NVRAM */
#define RTODC 60 /* read time of day clock */
#define CHKSER 61 /* check soft serial number */
#define SI86NVPRT 62 /* print an xtra_nvr structure */
#define SANUPD 63 /* sanity update of kernel buffers */
#define SI86KSTR 64 /* make a copy of a kernel string */
#define SI86MEM 65 /* return the memory size of system */
#define SI86TODEMON 66 /* Transfer control to firmware. */
#define SI86CCDEMON 67 /* Control character access to demon. */
#define SI86CACHE 68 /* Turn cache on and off. */
#define SI86DELMEM 69 /* Delete available memory for testing. */
#define SI86ADDMEM 70 /* Add back deleted memory. */
/* 71 through 74 reserved for VPIX */
#define SI86V86 71 /* V86 system calls (see v86.h) */
#define SI86SLTIME 72 /* Set local time correction */
#define SI86DSCR 75 /* Set a segment or gate descriptor */
#define RDUBLK 76 /* Read U Block */
/* #ifdef MERGE386 */
#define SI86VM86 81
#define SI86VMENABLE 82
/* #endif MERGE386 */
/* Merged Product defines */
#define SI86SHFIL 100 /* map a file into addr space of a proc */
#define SI86PCHRGN 101 /* make globally visible change to a region */
#define SI86BADVISE 102 /* badvise subcommand - see below for */
/* badvise subfunction definitions */
#define SI86SHRGN 103 /* enable/disable XENIX small model shared */
/* data context switching */
#define SI86CHIDT 104 /* set user level int 0xf0, ... 0xff handlers */
#define SI86EMULRDA 105 /* remove special emulator read access */
#define SI86GETPIPE 106 /* return the pipe filesystem */
#define SI86SETPIPE 107 /* set the pipe filesystem */
#define SI86SETPIPE_NM 108 /* set the pipe filesystem -non mountable */
#define SI86GETNPIPE 109 /* get # of pipe filesystems */
#define SI86GETPIPE_ALL 110 /* get data on all of pipe filesystems */
#define SI86POPPIPE 111 /* pop pipe file system off stack */
#define SI86APM 112 /* get APM information passed by boot(HW) */
#define SI86TIMECHG 113 /* get time before/after last timechange */
#define SI86GETFEATURES 114 /* get os features vector */
/* The SI86BADVISE command is used to set Xenix behaviour. */
#define SI86B_SET 0x0100 /* Set badvise bits */
#define SI86B_GET 0x0200 /* Get badvise bits */
#define SI86B_LOCK 0x0001 /* XENIX advisory locking bit */
#define SI86B_PRE_SV 0x0008 /* follow pre-System V x.out behavior */
#define SI86B_XOUT 0x0010 /* follow XENIX x.out behavior */
#define SI86B_XSDSWTCH 0x0080 /* XENIX small model shared data */
/* context switching enabled */
int
ibcs_sysi86(struct pt_regs * regs)
{
int cmd;
cmd = get_fs_long(((unsigned long *) regs->esp) + 1);
switch (cmd) {
case SI86FPHW: {
int *np, error;
/* If we remove the 'static' from the definition
* of fpu_error in linux/init/main.c we can tell
* whether we are using hardware or software at
* least. For now let's lie... (actually SCO
* Unix 3.4 gives me -1...)
*/
np = (int *)get_fs_long(((unsigned long *) regs->esp) + 2);
error = verify_area(VERIFY_WRITE, np, sizeof(int));
if (error)
return error;
put_fs_long(FP_387, np);
return 0;
}
case STIME: {
/* Set the system time. The argument is a long,
* sys_stime() expects a pointer to a long...
*/
return SYS(stime)(((unsigned long *) regs->esp) + 2);
}
case SETNAME: {
/* The name is required to be string of no more
* than 7 characters. We don't get passed the
* length so we are depending upon the current
* implementation of sys_sethostname() here.
*/
char *cp;
cp = (char *)get_fs_long(((unsigned long *) regs->esp) + 2);
return SYS(sethostname)(cp, 7);
}
case SI86MEM: {
/* Returns the size of physical memory.
*/
struct sysinfo i;
si_meminfo(&i);
return i.totalram;
}
#if defined(EMU_SCO)
case SI86GETFEATURES: {
char *vec;
int len, used, error;
if ((current->personality & PER_MASK) != PER_SCOSVR3) {
current->personality &= ~PER_MASK;
current->personality |= PER_SCOSVR3;
}
#if 1
vec = (char *)get_fs_long(((unsigned long *) regs->esp) + 2);
len = (int)get_fs_long(((unsigned long *) regs->esp) + 3);
/* No, I don't know what these feature flags actually
* _mean_. This vector just matches SCO OS 5.0.0.
*/
used = len > 12 ? 12 : len;
error = verify_area(VERIFY_WRITE, vec, used);
if (error)
return error;
memcpy_tofs(vec, "\001\001\001\001\001\001\001\001\002\001\001\001", used);
return used;
#else
return 0;
#endif
}
#endif
}
#ifdef IBCS_TRACE
if ((ibcs_trace & TRACE_API) || ibcs_func_p->trace) {
printk(KERN_DEBUG "iBCS2: unsupported sysi86 call %d\n", cmd);
}
#endif
return -EINVAL;
}
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