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Add compat shim for apm(4) to translate APM BIOS function numbers from i386

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to PC98-specific ones.  Any binaries using apm ioctl(4) commands but built
for i386 should also work on PC98 now.

Reviewed by:	imp, nyan
This commit is contained in:
Jung-uk Kim 2010-11-11 19:20:33 +00:00
parent 4403994d7d
commit 926ad40ff9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=215139
1 changed files with 17 additions and 0 deletions
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17
sys/i386/bios/apm.c
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@ -1389,6 +1389,23 @@ apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td
return (EPERM);
/* XXX compatibility with the old interface */
args = (struct apm_bios_arg *)addr;
#ifdef PC98
if (((args->eax >> 8) & 0xff) == 0x53) {
sc->bios.r.eax = args->eax & ~0xffff;
sc->bios.r.eax |= APM_BIOS << 8;
switch (args->eax & 0xff) {
case 0x0a:
sc->bios.r.eax |= APM_GETPWSTATUS;
break;
case 0x0e:
sc->bios.r.eax |= APM_DRVVERSION;
break;
default:
sc->bios.r.eax |= args->eax & 0xff;
break;
}
} else
#endif
sc->bios.r.eax = args->eax;
sc->bios.r.ebx = args->ebx;
sc->bios.r.ecx = args->ecx;