2005-04-21 16:53:53 +02:00
|
|
|
/* Types and constants shared between the generic and device dependent
|
|
|
|
|
* device driver code.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#define _POSIX_SOURCE 1 /* tell headers to include POSIX stuff */
|
|
|
|
|
#define _MINIX 1 /* tell headers to include MINIX stuff */
|
|
|
|
|
#define _SYSTEM 1 /* get negative error number in <errno.h> */
|
|
|
|
|
|
|
|
|
|
/* The following are so basic, all the *.c files get them automatically. */
|
|
|
|
|
#include <minix/config.h> /* MUST be first */
|
|
|
|
|
#include <ansi.h> /* MUST be second */
|
|
|
|
|
#include <minix/type.h>
|
2005-07-26 14:50:25 +02:00
|
|
|
#include <minix/ipc.h>
|
2005-04-21 16:53:53 +02:00
|
|
|
#include <minix/com.h>
|
|
|
|
|
#include <minix/callnr.h>
|
|
|
|
|
#include <sys/types.h>
|
|
|
|
|
#include <minix/const.h>
|
|
|
|
|
#include <minix/syslib.h>
|
2005-07-19 15:21:51 +02:00
|
|
|
#include <minix/sysutil.h>
|
2005-04-21 16:53:53 +02:00
|
|
|
|
|
|
|
|
#include <string.h>
|
|
|
|
|
#include <limits.h>
|
|
|
|
|
#include <stddef.h>
|
|
|
|
|
#include <errno.h>
|
|
|
|
|
|
|
|
|
|
#include <minix/partition.h>
|
|
|
|
|
#include <minix/u64.h>
|
|
|
|
|
|
|
|
|
|
/* Info about and entry points into the device dependent code. */
|
|
|
|
|
struct driver {
|
|
|
|
|
_PROTOTYPE( char *(*dr_name), (void) );
|
|
|
|
|
_PROTOTYPE( int (*dr_open), (struct driver *dp, message *m_ptr) );
|
|
|
|
|
_PROTOTYPE( int (*dr_close), (struct driver *dp, message *m_ptr) );
|
2009-12-02 10:57:48 +01:00
|
|
|
_PROTOTYPE( int (*dr_ioctl), (struct driver *dp, message *m_ptr) );
|
2005-04-21 16:53:53 +02:00
|
|
|
_PROTOTYPE( struct device *(*dr_prepare), (int device) );
|
2006-11-27 15:21:43 +01:00
|
|
|
_PROTOTYPE( int (*dr_transfer), (int proc_nr, int opcode, u64_t position,
|
2009-12-02 10:57:48 +01:00
|
|
|
iovec_t *iov, unsigned nr_req) );
|
2005-04-21 16:53:53 +02:00
|
|
|
_PROTOTYPE( void (*dr_cleanup), (void) );
|
|
|
|
|
_PROTOTYPE( void (*dr_geometry), (struct partition *entry) );
|
Merge of David's ptrace branch. Summary:
o Support for ptrace T_ATTACH/T_DETACH and T_SYSCALL
o PM signal handling logic should now work properly, even with debuggers
being present
o Asynchronous PM/VFS protocol, full IPC support for senda(), and
AMF_NOREPLY senda() flag
DETAILS
Process stop and delay call handling of PM:
o Added sys_runctl() kernel call with sys_stop() and sys_resume()
aliases, for PM to stop and resume a process
o Added exception for sending/syscall-traced processes to sys_runctl(),
and matching SIGKREADY pseudo-signal to PM
o Fixed PM signal logic to deal with requests from a process after
stopping it (so-called "delay calls"), using the SIGKREADY facility
o Fixed various PM panics due to race conditions with delay calls versus
VFS calls
o Removed special PRIO_STOP priority value
o Added SYS_LOCK RTS kernel flag, to stop an individual process from
running while modifying its process structure
Signal and debugger handling in PM:
o Fixed debugger signals being dropped if a second signal arrives when
the debugger has not retrieved the first one
o Fixed debugger signals being sent to the debugger more than once
o Fixed debugger signals unpausing process in VFS; removed PM_UNPAUSE_TR
protocol message
o Detached debugger signals from general signal logic and from being
blocked on VFS calls, meaning that even VFS can now be traced
o Fixed debugger being unable to receive more than one pending signal in
one process stop
o Fixed signal delivery being delayed needlessly when multiple signals
are pending
o Fixed wait test for tracer, which was returning for children that were
not waited for
o Removed second parallel pending call from PM to VFS for any process
o Fixed process becoming runnable between exec() and debugger trap
o Added support for notifying the debugger before the parent when a
debugged child exits
o Fixed debugger death causing child to remain stopped forever
o Fixed consistently incorrect use of _NSIG
Extensions to ptrace():
o Added T_ATTACH and T_DETACH ptrace request, to attach and detach a
debugger to and from a process
o Added T_SYSCALL ptrace request, to trace system calls
o Added T_SETOPT ptrace request, to set trace options
o Added TO_TRACEFORK trace option, to attach automatically to children
of a traced process
o Added TO_ALTEXEC trace option, to send SIGSTOP instead of SIGTRAP upon
a successful exec() of the tracee
o Extended T_GETUSER ptrace support to allow retrieving a process's priv
structure
o Removed T_STOP ptrace request again, as it does not help implementing
debuggers properly
o Added MINIX3-specific ptrace test (test42)
o Added proper manual page for ptrace(2)
Asynchronous PM/VFS interface:
o Fixed asynchronous messages not being checked when receive() is called
with an endpoint other than ANY
o Added AMF_NOREPLY senda() flag, preventing such messages from
satisfying the receive part of a sendrec()
o Added asynsend3() that takes optional flags; asynsend() is now a
#define passing in 0 as third parameter
o Made PM/VFS protocol asynchronous; reintroduced tell_fs()
o Made PM_BASE request/reply number range unique
o Hacked in a horrible temporary workaround into RS to deal with newly
revealed RS-PM-VFS race condition triangle until VFS is asynchronous
System signal handling:
o Fixed shutdown logic of device drivers; removed old SIGKSTOP signal
o Removed is-superuser check from PM's do_procstat() (aka getsigset())
o Added sigset macros to allow system processes to deal with the full
signal set, rather than just the POSIX subset
Miscellaneous PM fixes:
o Split do_getset into do_get and do_set, merging common code and making
structure clearer
o Fixed setpriority() being able to put to sleep processes using an
invalid parameter, or revive zombie processes
o Made find_proc() global; removed obsolete proc_from_pid()
o Cleanup here and there
Also included:
o Fixed false-positive boot order kernel warning
o Removed last traces of old NOTIFY_FROM code
THINGS OF POSSIBLE INTEREST
o It should now be possible to run PM at any priority, even lower than
user processes
o No assumptions are made about communication speed between PM and VFS,
although communication must be FIFO
o A debugger will now receive incoming debuggee signals at kill time
only; the process may not yet be fully stopped
o A first step has been made towards making the SYSTEM task preemptible
2009-09-30 11:57:22 +02:00
|
|
|
_PROTOTYPE( void (*dr_signal), (struct driver *dp, sigset_t *set) );
|
2005-07-26 14:50:25 +02:00
|
|
|
_PROTOTYPE( void (*dr_alarm), (struct driver *dp, message *m_ptr) );
|
2005-07-08 19:23:44 +02:00
|
|
|
_PROTOTYPE( int (*dr_cancel), (struct driver *dp, message *m_ptr) );
|
|
|
|
|
_PROTOTYPE( int (*dr_select), (struct driver *dp, message *m_ptr) );
|
2009-12-02 10:57:48 +01:00
|
|
|
_PROTOTYPE( int (*dr_other), (struct driver *dp, message *m_ptr) );
|
2005-08-25 10:19:11 +02:00
|
|
|
_PROTOTYPE( int (*dr_hw_int), (struct driver *dp, message *m_ptr) );
|
2005-04-21 16:53:53 +02:00
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Base and size of a partition in bytes. */
|
|
|
|
|
struct device {
|
|
|
|
|
u64_t dv_base;
|
|
|
|
|
u64_t dv_size;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
#define NIL_DEV ((struct device *) 0)
|
|
|
|
|
|
2009-12-02 10:57:48 +01:00
|
|
|
#define DRIVER_STD 0 /* Use the standard reply protocol */
|
|
|
|
|
#define DRIVER_ASYN 1 /* Use the new asynchronous protocol */
|
|
|
|
|
|
2005-04-21 16:53:53 +02:00
|
|
|
/* Functions defined by driver.c: */
|
2009-12-02 10:57:48 +01:00
|
|
|
_PROTOTYPE( void driver_task, (struct driver *dr, int type) );
|
2005-04-21 16:53:53 +02:00
|
|
|
_PROTOTYPE( char *no_name, (void) );
|
|
|
|
|
_PROTOTYPE( int do_nop, (struct driver *dp, message *m_ptr) );
|
|
|
|
|
_PROTOTYPE( struct device *nop_prepare, (int device) );
|
|
|
|
|
_PROTOTYPE( void nop_cleanup, (void) );
|
|
|
|
|
_PROTOTYPE( void nop_task, (void) );
|
Merge of David's ptrace branch. Summary:
o Support for ptrace T_ATTACH/T_DETACH and T_SYSCALL
o PM signal handling logic should now work properly, even with debuggers
being present
o Asynchronous PM/VFS protocol, full IPC support for senda(), and
AMF_NOREPLY senda() flag
DETAILS
Process stop and delay call handling of PM:
o Added sys_runctl() kernel call with sys_stop() and sys_resume()
aliases, for PM to stop and resume a process
o Added exception for sending/syscall-traced processes to sys_runctl(),
and matching SIGKREADY pseudo-signal to PM
o Fixed PM signal logic to deal with requests from a process after
stopping it (so-called "delay calls"), using the SIGKREADY facility
o Fixed various PM panics due to race conditions with delay calls versus
VFS calls
o Removed special PRIO_STOP priority value
o Added SYS_LOCK RTS kernel flag, to stop an individual process from
running while modifying its process structure
Signal and debugger handling in PM:
o Fixed debugger signals being dropped if a second signal arrives when
the debugger has not retrieved the first one
o Fixed debugger signals being sent to the debugger more than once
o Fixed debugger signals unpausing process in VFS; removed PM_UNPAUSE_TR
protocol message
o Detached debugger signals from general signal logic and from being
blocked on VFS calls, meaning that even VFS can now be traced
o Fixed debugger being unable to receive more than one pending signal in
one process stop
o Fixed signal delivery being delayed needlessly when multiple signals
are pending
o Fixed wait test for tracer, which was returning for children that were
not waited for
o Removed second parallel pending call from PM to VFS for any process
o Fixed process becoming runnable between exec() and debugger trap
o Added support for notifying the debugger before the parent when a
debugged child exits
o Fixed debugger death causing child to remain stopped forever
o Fixed consistently incorrect use of _NSIG
Extensions to ptrace():
o Added T_ATTACH and T_DETACH ptrace request, to attach and detach a
debugger to and from a process
o Added T_SYSCALL ptrace request, to trace system calls
o Added T_SETOPT ptrace request, to set trace options
o Added TO_TRACEFORK trace option, to attach automatically to children
of a traced process
o Added TO_ALTEXEC trace option, to send SIGSTOP instead of SIGTRAP upon
a successful exec() of the tracee
o Extended T_GETUSER ptrace support to allow retrieving a process's priv
structure
o Removed T_STOP ptrace request again, as it does not help implementing
debuggers properly
o Added MINIX3-specific ptrace test (test42)
o Added proper manual page for ptrace(2)
Asynchronous PM/VFS interface:
o Fixed asynchronous messages not being checked when receive() is called
with an endpoint other than ANY
o Added AMF_NOREPLY senda() flag, preventing such messages from
satisfying the receive part of a sendrec()
o Added asynsend3() that takes optional flags; asynsend() is now a
#define passing in 0 as third parameter
o Made PM/VFS protocol asynchronous; reintroduced tell_fs()
o Made PM_BASE request/reply number range unique
o Hacked in a horrible temporary workaround into RS to deal with newly
revealed RS-PM-VFS race condition triangle until VFS is asynchronous
System signal handling:
o Fixed shutdown logic of device drivers; removed old SIGKSTOP signal
o Removed is-superuser check from PM's do_procstat() (aka getsigset())
o Added sigset macros to allow system processes to deal with the full
signal set, rather than just the POSIX subset
Miscellaneous PM fixes:
o Split do_getset into do_get and do_set, merging common code and making
structure clearer
o Fixed setpriority() being able to put to sleep processes using an
invalid parameter, or revive zombie processes
o Made find_proc() global; removed obsolete proc_from_pid()
o Cleanup here and there
Also included:
o Fixed false-positive boot order kernel warning
o Removed last traces of old NOTIFY_FROM code
THINGS OF POSSIBLE INTEREST
o It should now be possible to run PM at any priority, even lower than
user processes
o No assumptions are made about communication speed between PM and VFS,
although communication must be FIFO
o A debugger will now receive incoming debuggee signals at kill time
only; the process may not yet be fully stopped
o A first step has been made towards making the SYSTEM task preemptible
2009-09-30 11:57:22 +02:00
|
|
|
_PROTOTYPE( void nop_signal, (struct driver *dp, sigset_t *set) );
|
2005-07-26 14:50:25 +02:00
|
|
|
_PROTOTYPE( void nop_alarm, (struct driver *dp, message *m_ptr) );
|
2005-07-08 19:23:44 +02:00
|
|
|
_PROTOTYPE( int nop_cancel, (struct driver *dp, message *m_ptr) );
|
|
|
|
|
_PROTOTYPE( int nop_select, (struct driver *dp, message *m_ptr) );
|
2009-12-02 10:57:48 +01:00
|
|
|
_PROTOTYPE( int do_diocntl, (struct driver *dp, message *m_ptr) );
|
|
|
|
|
_PROTOTYPE( int nop_ioctl, (struct driver *dp, message *m_ptr) );
|
2007-01-12 14:33:12 +01:00
|
|
|
_PROTOTYPE( int mq_queue, (message *m_ptr) );
|
2008-11-19 13:26:10 +01:00
|
|
|
_PROTOTYPE( void init_buffer, (void) );
|
2005-04-21 16:53:53 +02:00
|
|
|
|
|
|
|
|
/* Parameters for the disk drive. */
|
|
|
|
|
#define SECTOR_SIZE 512 /* physical sector size in bytes */
|
|
|
|
|
#define SECTOR_SHIFT 9 /* for division */
|
|
|
|
|
#define SECTOR_MASK 511 /* and remainder */
|
|
|
|
|
|
|
|
|
|
/* Size of the DMA buffer buffer in bytes. */
|
2005-08-03 13:53:36 +02:00
|
|
|
#define USE_EXTRA_DMA_BUF 0 /* usually not needed */
|
2005-04-21 16:53:53 +02:00
|
|
|
#define DMA_BUF_SIZE (DMA_SECTORS * SECTOR_SIZE)
|
|
|
|
|
|
|
|
|
|
#if (CHIP == INTEL)
|
|
|
|
|
extern u8_t *tmp_buf; /* the DMA buffer */
|
|
|
|
|
#else
|
|
|
|
|
extern u8_t tmp_buf[]; /* the DMA buffer */
|
|
|
|
|
#endif
|
|
|
|
|
extern phys_bytes tmp_phys; /* phys address of DMA buffer */
|
