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Change for safe copies, and DEV_REVIVE message including grant id

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This commit is contained in:
Ben Gras 2006-06-20 08:52:11 +00:00
parent 3bd3c2cee1
commit 4fa6691106
2 changed files with 29 additions and 14 deletions
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2
drivers/cmos/Makefile
View file

@ -14,7 +14,7 @@ MAKE = exec make
CC = exec cc
CFLAGS = -I$i
LDFLAGS = -i
LIBS = -lsys -lsysutil
LIBS = -lsysutil -lsys
OBJ = cmos.o
LIBDRIVER = $d/libdriver/driver.o

41
drivers/cmos/cmos.c
View file

@ -20,11 +20,12 @@
#include <time.h>
#include <ibm/cmos.h>
#include <ibm/bios.h>
#include <minix/safecopies.h>
extern int errno; /* error number for PM calls */
FORWARD _PROTOTYPE( int gettime, (int who, int y2kflag, vir_bytes dst_time));
FORWARD _PROTOTYPE( void reply, (int reply, int replyee, int proc, int s));
FORWARD _PROTOTYPE( int gettime, (int who, int y2kflag, vir_bytes dst_time, int safe));
FORWARD _PROTOTYPE( void reply, (int reply, int replyee, int proc, cp_grant_id_t, int s));
FORWARD _PROTOTYPE( int read_register, (int register_address));
FORWARD _PROTOTYPE( int get_cmostime, (struct tm *tmp, int y2kflag));
@ -40,9 +41,11 @@ PUBLIC void main(void)
int y2kflag;
int result;
int suspended = NONE;
cp_grant_id_t susp_grant = GRANT_INVALID;
int s;
while(TRUE) {
int safe = 0;
/* Get work. */
if (OK != (s=receive(ANY, &m)))
@ -54,12 +57,15 @@ PUBLIC void main(void)
case DEV_OPEN:
case DEV_CLOSE:
case CANCEL:
reply(TASK_REPLY, m.m_source, m.IO_ENDPT, OK);
reply(TASK_REPLY, m.m_source, m.IO_ENDPT, GRANT_INVALID, OK);
break;
case DEV_PING:
notify(m.m_source);
break;
case DEV_IOCTL_S:
safe=1;
/* Fall through. */
case DEV_IOCTL:
/* Probably best to SUSPEND the caller, CMOS I/O has nasty timeouts.
@ -68,17 +74,18 @@ PUBLIC void main(void)
* requests at a time.
*/
if (suspended != NONE) {
reply(TASK_REPLY, m.m_source, m.IO_ENDPT, EBUSY);
reply(TASK_REPLY, m.m_source, m.IO_ENDPT, GRANT_INVALID, EBUSY);
break;
}
suspended = m.IO_ENDPT;
reply(TASK_REPLY, m.m_source, m.IO_ENDPT, SUSPEND);
susp_grant = (cp_grant_id_t) m.IO_GRANT;
reply(TASK_REPLY, m.m_source, m.IO_ENDPT, susp_grant, SUSPEND);
switch(m.REQUEST) {
case CIOCGETTIME: /* get CMOS time */
case CIOCGETTIMEY2K:
y2kflag = (m.REQUEST = CIOCGETTIME) ? 0 : 1;
result = gettime(m.IO_ENDPT, y2kflag, (vir_bytes) m.ADDRESS);
y2kflag = (m.REQUEST == CIOCGETTIME) ? 0 : 1;
result = gettime(m.IO_ENDPT, y2kflag, (vir_bytes) m.ADDRESS, safe);
break;
case CIOCSETTIME:
case CIOCSETTIMEY2K:
@ -96,9 +103,9 @@ PUBLIC void main(void)
* processes and return the status of reading the CMOS.
*/
if (suspended == NONE)
reply(DEV_NO_STATUS, m.m_source, NONE, OK);
reply(DEV_NO_STATUS, m.m_source, NONE, GRANT_INVALID, OK);
else
reply(DEV_REVIVE, m.m_source, suspended, result);
reply(DEV_REVIVE, m.m_source, suspended, susp_grant, result);
suspended = NONE;
break;
@ -107,7 +114,7 @@ PUBLIC void main(void)
continue;
default:
reply(TASK_REPLY, m.m_source, m.IO_ENDPT, EINVAL);
reply(TASK_REPLY, m.m_source, m.IO_ENDPT, GRANT_INVALID, EINVAL);
}
}
}
@ -115,7 +122,7 @@ PUBLIC void main(void)
/*===========================================================================*
* reply *
*===========================================================================*/
PRIVATE void reply(int code, int replyee, int process, int status)
PRIVATE void reply(int code, int replyee, int process, cp_grant_id_t grantid, int status)
{
message m;
int s;
@ -123,6 +130,7 @@ PRIVATE void reply(int code, int replyee, int process, int status)
m.m_type = code; /* TASK_REPLY or REVIVE */
m.REP_STATUS = status; /* result of device operation */
m.REP_ENDPT = process; /* which user made the request */
m.REP_IO_GRANT = grantid; /* I/O grant on which to unSUSPEND */
if (OK != (s=send(replyee, &m)))
panic("CMOS", "sending reply failed", s);
}
@ -130,7 +138,7 @@ PRIVATE void reply(int code, int replyee, int process, int status)
/*===========================================================================*
* gettime *
*===========================================================================*/
PRIVATE int gettime(int who, int y2kflag, vir_bytes dst_time)
PRIVATE int gettime(int who, int y2kflag, vir_bytes dst_time, int safe)
{
unsigned char mach_id, cmos_state;
struct tm time1;
@ -166,8 +174,15 @@ PRIVATE int gettime(int who, int y2kflag, vir_bytes dst_time)
*/
if (get_cmostime(&time1, y2kflag) != 0)
return(EFAULT);
sys_datacopy(SELF, (vir_bytes) &time1,
/* Copy result back, safely or not. */
if(safe) {
sys_safecopyto(who, dst_time, 0, (vir_bytes) &time1,
sizeof(struct tm), D);
} else {
sys_datacopy(SELF, (vir_bytes) &time1,
who, dst_time, sizeof(struct tm));
}
return(OK);
}