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/* -*- c -*- ------------------------------------------------------------- *
*
* Copyright 2004-2005 Murali Krishnan Ganapathy - All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, Inc., 53 Temple Place Ste 330,
* Boston MA 02111-1307, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
#include <string.h>
#include <com32.h>
#include "syslnx.h"
com32sys_t inreg, outreg; // Global registers for this module
char issyslinux(void)
{
REG_EAX(inreg) = 0x00003000;
REG_EBX(inreg) = REG_ECX(inreg) = REG_EDX(inreg) = 0xFFFFFFFF;
__intcall(0x21, &inreg, &outreg);
return (REG_EAX(outreg) == 0x59530000) &&
(REG_EBX(outreg) == 0x4c530000) &&
(REG_ECX(outreg) == 0x4e490000) && (REG_EDX(outreg) == 0x58550000);
}
void runsyslinuxcmd(const char *cmd)
{
strcpy(__com32.cs_bounce, cmd);
REG_AX(inreg) = 0x0003; // Run command
REG_BX(inreg) = OFFS(__com32.cs_bounce);
REG_ES(inreg) = SEG(__com32.cs_bounce);
__intcall(0x22, &inreg, &outreg);
}
void gototxtmode(void)
{
REG_AX(inreg) = 0x0005;
__intcall(0x22, &inreg, &outreg);
}
void syslinux_idle(void)
{
REG_AX(inreg) = 0x0013;
__intcall(0x22, &inreg, &outreg);
}
unsigned int getversion(char *deriv, unsigned int *numfun)
{
REG_AX(inreg) = 0x0001;
__intcall(0x22, &inreg, &outreg);
if (deriv)
*deriv = REG_DL(outreg);
if (numfun)
*numfun = REG_AX(outreg);
return REG_CX(outreg);
}
void runsyslinuximage(const char *cmd, long ipappend)
{
unsigned int numfun = 0;
char *ptr, *cmdline;
(void)ipappend; // XXX: Unused?!
getversion(NULL, &numfun);
// Function 16h not supported Fall back to runcommand
if (numfun < 0x16)
runsyslinuxcmd(cmd);
// Try the Run Kernel Image function
// Split command line into
strcpy(__com32.cs_bounce, cmd);
ptr = __com32.cs_bounce;
// serach for first space or end of string
while ((*ptr) && (*ptr != ' '))
ptr++;
if (!*ptr)
cmdline = ptr; // no command line
else {
*ptr++ = '\0'; // terminate kernal name
cmdline = ptr + 1;
while (*cmdline != ' ')
cmdline++; // find first non-space
}
// Now call the interrupt
REG_BX(inreg) = OFFS(cmdline);
REG_ES(inreg) = SEG(cmdline);
REG_SI(inreg) = OFFS(__com32.cs_bounce);
REG_DS(inreg) = SEG(__com32.cs_bounce);
REG_EDX(inreg) = 0;
__intcall(0x22, &inreg, &outreg); // If successful does not return
}
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