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- Fixed DMA 64k boundary problem.

Browse Source 
- Test the processor flag to detect disk I/O BIOS errors.

Submitted by:	IMAI Takeshi <take-i@ceres.dti.ne.jp>
This commit is contained in:
KATO Takenori 1999-09-23 03:57:16 +00:00
parent acb4866855
commit 3e30c6e0ef
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=51586
1 changed files with 14 additions and 7 deletions
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21
sys/boot/pc98/libpc98/biosdisk.c
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@ -764,7 +764,7 @@ bd_read(struct open_disk *od, daddr_t dblk, int blks, caddr_t dest)
/* Decide whether we have to bounce */
#ifdef PC98
if (((od->od_unit & 0xf0) == 0x90 || (od->od_unit & 0xf0) == 0x30) &&
if (
#else
if ((od->od_unit < 0x80) &&
#endif
@ -776,7 +776,11 @@ bd_read(struct open_disk *od, daddr_t dblk, int blks, caddr_t dest)
* need to. Use the bottom half unless there is a break there, in which case we
* use the top half.
*/
#ifdef PC98
x = min(od->od_sec, blks);
#else
x = min(FLOPPY_BOUNCEBUF, blks);
#endif
bbuf = malloc(x * 2 * BIOSDISK_SECSIZE);
if (((u_int32_t)VTOP(bbuf) & 0xffff0000) == ((u_int32_t)VTOP(dest + x * BIOSDISK_SECSIZE) & 0xffff0000)) {
breg = bbuf;
@ -817,18 +821,21 @@ bd_read(struct open_disk *od, daddr_t dblk, int blks, caddr_t dest)
/* if retrying, reset the drive */
if (retry > 0) {
#ifdef PC98
v86.ctl = V86_FLAGS;
v86.addr = 0x1b;
v86.eax = 0x0300 | od->od_unit;
#else
v86.ctl = V86_FLAGS;
v86.addr = 0x13;
v86.eax = 0;
v86.edx = od->od_unit;
v86int();
#endif
v86int();
}
/* build request XXX support EDD requests too */
v86.ctl = V86_FLAGS;
#ifdef PC98
v86.ctl = 0;
v86.addr = 0x1b;
if (od->od_flags & BD_FLOPPY) {
v86.eax = 0xd600 | od->od_unit;
@ -842,17 +849,15 @@ bd_read(struct open_disk *od, daddr_t dblk, int blks, caddr_t dest)
v86.ebx = x * BIOSDISK_SECSIZE;
v86.es = VTOPSEG(xp);
v86.ebp = VTOPOFF(xp);
v86int();
#else
v86.ctl = V86_FLAGS;
v86.addr = 0x13;
v86.eax = 0x200 | x;
v86.ecx = ((cyl & 0xff) << 8) | ((cyl & 0x300) >> 2) | sec;
v86.edx = (hd << 8) | od->od_unit;
v86.es = VTOPSEG(xp);
v86.ebx = VTOPOFF(xp);
v86int();
#endif
v86int();
result = (v86.efl & 0x1);
if (result == 0)
break;
@ -900,7 +905,7 @@ bd_getgeom(struct open_disk *od)
od->od_sec = (od->od_unit & 0xf0) == 0x30 ? 18 : 15;
}
else {
v86.ctl = 0;
v86.ctl = V86_FLAGS;
v86.addr = 0x1b;
v86.eax = 0x8400 | od->od_unit;
v86int();
@ -908,6 +913,8 @@ bd_getgeom(struct open_disk *od)
od->od_cyl = v86.ecx;
od->od_hds = (v86.edx >> 8) & 0xff;
od->od_sec = v86.edx & 0xff;
if (v86.efl & 0x1)
return(1);
}
#else
v86.ctl = V86_FLAGS;