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/*
* Copyright (c) 2001-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __TRU64_HH__
#define __TRU64_HH__
#include "config/full_system.hh"
#if FULL_SYSTEM
class Tru64 {};
#else //!FULL_SYSTEM
#include <sys/types.h>
#include <sys/stat.h>
#if defined(__OpenBSD__) || defined(__APPLE__) || defined(__FreeBSD__)
#include <sys/param.h>
#include <sys/mount.h>
#else
#include <sys/statfs.h>
#endif
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h> // for memset()
#include <unistd.h>
#include "cpu/base.hh"
#include "sim/root.hh"
#include "sim/syscall_emul.hh"
typedef struct stat global_stat;
typedef struct statfs global_statfs;
typedef struct dirent global_dirent;
class TranslatingPort;
///
/// This class encapsulates the types, structures, constants,
/// functions, and syscall-number mappings specific to the Alpha Tru64
/// syscall interface.
///
class Tru64 {
public:
//@{
/// Basic Tru64 types.
typedef uint64_t size_t;
typedef uint64_t off_t;
typedef uint16_t nlink_t;
typedef int32_t dev_t;
typedef uint32_t uid_t;
typedef uint32_t gid_t;
typedef uint32_t time_t;
typedef uint32_t mode_t;
typedef uint32_t ino_t;
typedef struct { int val[2]; } quad;
typedef quad fsid_t;
//@}
/// Stat buffer. Note that Tru64 v5.0+ use a new "F64" stat
/// structure, and a new set of syscall numbers for stat calls.
/// On some hosts (notably Linux) define st_atime, st_mtime, and
/// st_ctime as macros, so we append an X to get around this.
struct F64_stat {
dev_t st_dev; //!< st_dev
int32_t st_retired1; //!< st_retired1
mode_t st_mode; //!< st_mode
nlink_t st_nlink; //!< st_nlink
uint16_t st_nlink_reserved; //!< st_nlink_reserved
uid_t st_uid; //!< st_uid
gid_t st_gid; //!< st_gid
dev_t st_rdev; //!< st_rdev
dev_t st_ldev; //!< st_ldev
off_t st_size; //!< st_size
time_t st_retired2; //!< st_retired2
int32_t st_uatime; //!< st_uatime
time_t st_retired3; //!< st_retired3
int32_t st_umtime; //!< st_umtime
time_t st_retired4; //!< st_retired4
int32_t st_uctime; //!< st_uctime
int32_t st_retired5; //!< st_retired5
int32_t st_retired6; //!< st_retired6
uint32_t st_flags; //!< st_flags
uint32_t st_gen; //!< st_gen
uint64_t st_spare[4]; //!< st_spare[4]
ino_t st_ino; //!< st_ino
int32_t st_ino_reserved; //!< st_ino_reserved
time_t st_atimeX; //!< st_atime
int32_t st_atime_reserved; //!< st_atime_reserved
time_t st_mtimeX; //!< st_mtime
int32_t st_mtime_reserved; //!< st_mtime_reserved
time_t st_ctimeX; //!< st_ctime
int32_t st_ctime_reserved; //!< st_ctime_reserved
uint64_t st_blksize; //!< st_blksize
uint64_t st_blocks; //!< st_blocks
};
/// Old Tru64 v4.x stat struct.
/// Tru64 maintains backwards compatibility with v4.x by
/// implementing another set of stat functions using the old
/// structure definition and binding them to the old syscall
/// numbers.
struct pre_F64_stat {
dev_t st_dev;
ino_t st_ino;
mode_t st_mode;
nlink_t st_nlink;
uid_t st_uid __attribute__ ((aligned(sizeof(uid_t))));
gid_t st_gid;
dev_t st_rdev;
off_t st_size __attribute__ ((aligned(sizeof(off_t))));
time_t st_atimeX;
int32_t st_uatime;
time_t st_mtimeX;
int32_t st_umtime;
time_t st_ctimeX;
int32_t st_uctime;
uint32_t st_blksize;
int32_t st_blocks;
uint32_t st_flags;
uint32_t st_gen;
};
/// For statfs().
struct F64_statfs {
int16_t f_type;
int16_t f_flags;
int32_t f_retired1;
int32_t f_retired2;
int32_t f_retired3;
int32_t f_retired4;
int32_t f_retired5;
int32_t f_retired6;
int32_t f_retired7;
fsid_t f_fsid;
int32_t f_spare[9];
char f_retired8[90];
char f_retired9[90];
uint64_t dummy[10]; // was union mount_info mount_info;
uint64_t f_flags2;
int64_t f_spare2[14];
int64_t f_fsize;
int64_t f_bsize;
int64_t f_blocks;
int64_t f_bfree;
int64_t f_bavail;
int64_t f_files;
int64_t f_ffree;
char f_mntonname[1024];
char f_mntfromname[1024];
};
/// For old Tru64 v4.x statfs()
struct pre_F64_statfs {
int16_t f_type;
int16_t f_flags;
int32_t f_fsize;
int32_t f_bsize;
int32_t f_blocks;
int32_t f_bfree;
int32_t f_bavail;
int32_t f_files;
int32_t f_ffree;
fsid_t f_fsid;
int32_t f_spare[9];
char f_mntonname[90];
char f_mntfromname[90];
uint64_t dummy[10]; // was union mount_info mount_info;
};
/// For getdirentries().
struct dirent
{
ino_t d_ino; //!< file number of entry
uint16_t d_reclen; //!< length of this record
uint16_t d_namlen; //!< length of string in d_name
char d_name[256]; //!< dummy name length
};
/// Length of strings in struct utsname (plus 1 for null char).
static const int _SYS_NMLN = 32;
/// Interface struct for uname().
struct utsname {
char sysname[_SYS_NMLN]; //!< System name.
char nodename[_SYS_NMLN]; //!< Node name.
char release[_SYS_NMLN]; //!< OS release.
char version[_SYS_NMLN]; //!< OS version.
char machine[_SYS_NMLN]; //!< Machine type.
};
/// Limit struct for getrlimit/setrlimit.
struct rlimit {
uint64_t rlim_cur; //!< soft limit
uint64_t rlim_max; //!< hard limit
};
/// For getsysinfo() GSI_CPU_INFO option.
struct cpu_info {
uint32_t current_cpu; //!< current_cpu
uint32_t cpus_in_box; //!< cpus_in_box
uint32_t cpu_type; //!< cpu_type
uint32_t ncpus; //!< ncpus
uint64_t cpus_present; //!< cpus_present
uint64_t cpus_running; //!< cpus_running
uint64_t cpu_binding; //!< cpu_binding
uint64_t cpu_ex_binding; //!< cpu_ex_binding
uint32_t mhz; //!< mhz
uint32_t unused[3]; //!< future expansion
};
/// For gettimeofday.
struct timeval {
uint32_t tv_sec; //!< seconds
uint32_t tv_usec; //!< microseconds
};
/// For getrusage().
struct rusage {
struct timeval ru_utime; //!< user time used
struct timeval ru_stime; //!< system time used
uint64_t ru_maxrss; //!< ru_maxrss
uint64_t ru_ixrss; //!< integral shared memory size
uint64_t ru_idrss; //!< integral unshared data "
uint64_t ru_isrss; //!< integral unshared stack "
uint64_t ru_minflt; //!< page reclaims - total vmfaults
uint64_t ru_majflt; //!< page faults
uint64_t ru_nswap; //!< swaps
uint64_t ru_inblock; //!< block input operations
uint64_t ru_oublock; //!< block output operations
uint64_t ru_msgsnd; //!< messages sent
uint64_t ru_msgrcv; //!< messages received
uint64_t ru_nsignals; //!< signals received
uint64_t ru_nvcsw; //!< voluntary context switches
uint64_t ru_nivcsw; //!< involuntary "
};
/// For sigreturn().
struct sigcontext {
int64_t sc_onstack; //!< sigstack state to restore
int64_t sc_mask; //!< signal mask to restore
int64_t sc_pc; //!< pc at time of signal
int64_t sc_ps; //!< psl to retore
int64_t sc_regs[32]; //!< processor regs 0 to 31
int64_t sc_ownedfp; //!< fp has been used
int64_t sc_fpregs[32]; //!< fp regs 0 to 31
uint64_t sc_fpcr; //!< floating point control reg
uint64_t sc_fp_control; //!< software fpcr
int64_t sc_reserved1; //!< reserved for kernel
uint32_t sc_kreserved1; //!< reserved for kernel
uint32_t sc_kreserved2; //!< reserved for kernel
size_t sc_ssize; //!< stack size
caddr_t sc_sbase; //!< stack start
uint64_t sc_traparg_a0; //!< a0 argument to trap on exc
uint64_t sc_traparg_a1; //!< a1 argument to trap on exc
uint64_t sc_traparg_a2; //!< a2 argument to trap on exc
uint64_t sc_fp_trap_pc; //!< imprecise pc
uint64_t sc_fp_trigger_sum; //!< Exception summary at trigg
uint64_t sc_fp_trigger_inst; //!< Instruction at trigger pc
};
/// For table().
struct tbl_sysinfo {
uint64_t si_user; //!< User time
uint64_t si_nice; //!< Nice time
uint64_t si_sys; //!< System time
uint64_t si_idle; //!< Idle time
uint64_t si_hz; //!< hz
uint64_t si_phz; //!< phz
uint64_t si_boottime; //!< Boot time in seconds
uint64_t wait; //!< Wait time
uint32_t si_max_procs; //!< rpb->rpb_numprocs
uint32_t pad; //!< padding
};
/// For stack_create.
struct vm_stack {
// was void *
Addr address; //!< address hint
size_t rsize; //!< red zone size
size_t ysize; //!< yellow zone size
size_t gsize; //!< green zone size
size_t swap; //!< amount of swap to reserve
size_t incr; //!< growth increment
uint64_t align; //!< address alignment
uint64_t flags; //!< MAP_FIXED etc.
// was struct memalloc_attr *
Addr attr; //!< allocation policy
uint64_t reserved; //!< reserved
};
/// Return values for nxm calls.
enum {
KERN_NOT_RECEIVER = 7,
KERN_NOT_IN_SET = 12
};
/// For nxm_task_init.
static const int NXM_TASK_INIT_VP = 2; //!< initial thread is VP
/// Task attribute structure.
struct nxm_task_attr {
int64_t nxm_callback; //!< nxm_callback
unsigned int nxm_version; //!< nxm_version
unsigned short nxm_uniq_offset; //!< nxm_uniq_offset
unsigned short flags; //!< flags
int nxm_quantum; //!< nxm_quantum
int pad1; //!< pad1
int64_t pad2; //!< pad2
};
/// Signal set.
typedef uint64_t sigset_t;
/// Thread state shared between user & kernel.
struct ushared_state {
sigset_t sigmask; //!< thread signal mask
sigset_t sig; //!< thread pending mask
// struct nxm_pth_state *
Addr pth_id; //!< out-of-line state
int flags; //!< shared flags
#define US_SIGSTACK 0x1 // thread called sigaltstack
#define US_ONSTACK 0x2 // thread is running on altstack
#define US_PROFILE 0x4 // thread called profil
#define US_SYSCALL 0x8 // thread in syscall
#define US_TRAP 0x10 // thread has trapped
#define US_YELLOW 0x20 // thread has mellowed yellow
#define US_YZONE 0x40 // thread has zoned out
#define US_FP_OWNED 0x80 // thread used floating point
int cancel_state; //!< thread's cancelation state
#define US_CANCEL 0x1 // cancel pending
#define US_NOCANCEL 0X2 // synch cancel disabled
#define US_SYS_NOCANCEL 0x4 // syscall cancel disabled
#define US_ASYNC_NOCANCEL 0x8 // asynch cancel disabled
#define US_CANCEL_BITS (US_NOCANCEL|US_SYS_NOCANCEL|US_ASYNC_NOCANCEL)
#define US_CANCEL_MASK (US_CANCEL|US_NOCANCEL|US_SYS_NOCANCEL| \
US_ASYNC_NOCANCEL)
// These are semi-shared. They are always visible to
// the kernel but are never context-switched by the library.
int nxm_ssig; //!< scheduler's synchronous signals
int reserved1; //!< reserved1
int64_t nxm_active; //!< scheduler active
int64_t reserved2; //!< reserved2
};
struct nxm_sched_state {
struct ushared_state nxm_u; //!< state own by user thread
unsigned int nxm_bits; //!< scheduler state / slot
int nxm_quantum; //!< quantum count-down value
int nxm_set_quantum; //!< quantum reset value
int nxm_sysevent; //!< syscall state
// struct nxm_upcall *
Addr nxm_uc_ret; //!< stack ptr of null thread
// void *
Addr nxm_tid; //!< scheduler's thread id
int64_t nxm_va; //!< page fault address
// struct nxm_pth_state *
Addr nxm_pthid; //!< id of null thread
uint64_t nxm_bound_pcs_count; //!< bound PCS thread count
int64_t pad[2]; //!< pad
};
/// nxm_shared.
struct nxm_shared {
int64_t nxm_callback; //!< address of upcall routine
unsigned int nxm_version; //!< version number
unsigned short nxm_uniq_offset; //!< correction factor for TEB
unsigned short pad1; //!< pad1
int64_t space[2]; //!< future growth
struct nxm_sched_state nxm_ss[1]; //!< array of shared areas
};
/// nxm_slot_state_t.
enum nxm_slot_state_t {
NXM_SLOT_AVAIL,
NXM_SLOT_BOUND,
NXM_SLOT_UNBOUND,
NXM_SLOT_EMPTY
};
/// nxm_config_info
struct nxm_config_info {
int nxm_nslots_per_rad; //!< max number of VP slots per RAD
int nxm_nrads; //!< max number of RADs
// nxm_slot_state_t *
Addr nxm_slot_state; //!< per-VP slot state
// struct nxm_shared *
Addr nxm_rad[1]; //!< per-RAD shared areas
};
/// For nxm_thread_create.
enum nxm_thread_type {
NXM_TYPE_SCS = 0,
NXM_TYPE_VP = 1,
NXM_TYPE_MANAGER = 2
};
/// Thread attributes.
struct nxm_thread_attr {
int version; //!< version
int type; //!< type
int cancel_flags; //!< cancel_flags
int priority; //!< priority
int policy; //!< policy
int signal_type; //!< signal_type
// void *
Addr pthid; //!< pthid
sigset_t sigmask; //!< sigmask
/// Initial register values.
struct {
uint64_t pc; //!< pc
uint64_t sp; //!< sp
uint64_t a0; //!< a0
} registers;
uint64_t pad2[2]; //!< pad2
};
/// Helper function to convert a host stat buffer to a target stat
/// buffer. Also copies the target buffer out to the simulated
/// memory space. Used by stat(), fstat(), and lstat().
template <class T>
static void
copyOutStatBuf(TranslatingPort *mem, Addr addr, global_stat *host)
{
using namespace TheISA;
TypedBufferArg<T> tgt(addr);
tgt->st_dev = htog(host->st_dev);
tgt->st_ino = htog(host->st_ino);
tgt->st_mode = htog(host->st_mode);
tgt->st_nlink = htog(host->st_nlink);
tgt->st_uid = htog(host->st_uid);
tgt->st_gid = htog(host->st_gid);
tgt->st_rdev = htog(host->st_rdev);
tgt->st_size = htog(host->st_size);
tgt->st_atimeX = htog(host->st_atime);
tgt->st_mtimeX = htog(host->st_mtime);
tgt->st_ctimeX = htog(host->st_ctime);
tgt->st_blksize = htog(host->st_blksize);
tgt->st_blocks = htog(host->st_blocks);
tgt.copyOut(mem);
}
/// Helper function to convert a host statfs buffer to a target statfs
/// buffer. Also copies the target buffer out to the simulated
/// memory space. Used by statfs() and fstatfs().
template <class T>
static void
copyOutStatfsBuf(TranslatingPort *mem, Addr addr, global_statfs *host)
{
using namespace TheISA;
TypedBufferArg<T> tgt(addr);
#if defined(__OpenBSD__) || defined(__APPLE__) || defined(__FreeBSD__)
tgt->f_type = 0;
#else
tgt->f_type = htog(host->f_type);
#endif
tgt->f_bsize = htog(host->f_bsize);
tgt->f_blocks = htog(host->f_blocks);
tgt->f_bfree = htog(host->f_bfree);
tgt->f_bavail = htog(host->f_bavail);
tgt->f_files = htog(host->f_files);
tgt->f_ffree = htog(host->f_ffree);
// Is this as string normally?
memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid));
tgt.copyOut(mem);
}
class F64 {
public:
static void copyOutStatBuf(TranslatingPort *mem, Addr addr,
global_stat *host)
{
Tru64::copyOutStatBuf<Tru64::F64_stat>(mem, addr, host);
}
static void copyOutStatfsBuf(TranslatingPort *mem, Addr addr,
global_statfs *host)
{
Tru64::copyOutStatfsBuf<Tru64::F64_statfs>(mem, addr, host);
}
};
class PreF64 {
public:
static void copyOutStatBuf(TranslatingPort *mem, Addr addr,
global_stat *host)
{
Tru64::copyOutStatBuf<Tru64::pre_F64_stat>(mem, addr, host);
}
static void copyOutStatfsBuf(TranslatingPort *mem, Addr addr,
global_statfs *host)
{
Tru64::copyOutStatfsBuf<Tru64::pre_F64_statfs>(mem, addr, host);
}
};
/// Helper function to convert a host stat buffer to an old pre-F64
/// (4.x) target stat buffer. Also copies the target buffer out to
/// the simulated memory space. Used by pre_F64_stat(),
/// pre_F64_fstat(), and pre_F64_lstat().
static void
copyOutPreF64StatBuf(TranslatingPort *mem, Addr addr, struct stat *host)
{
using namespace TheISA;
TypedBufferArg<Tru64::pre_F64_stat> tgt(addr);
tgt->st_dev = htog(host->st_dev);
tgt->st_ino = htog(host->st_ino);
tgt->st_mode = htog(host->st_mode);
tgt->st_nlink = htog(host->st_nlink);
tgt->st_uid = htog(host->st_uid);
tgt->st_gid = htog(host->st_gid);
tgt->st_rdev = htog(host->st_rdev);
tgt->st_size = htog(host->st_size);
tgt->st_atimeX = htog(host->st_atime);
tgt->st_mtimeX = htog(host->st_mtime);
tgt->st_ctimeX = htog(host->st_ctime);
tgt->st_blksize = htog(host->st_blksize);
tgt->st_blocks = htog(host->st_blocks);
tgt.copyOut(mem);
}
/// The target system's hostname.
static const char *hostname;
/// Target getdirentries() handler.
static SyscallReturn
getdirentriesFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
using namespace TheISA;
#ifdef __CYGWIN__
panic("getdirent not implemented on cygwin!");
#else
int fd = process->sim_fd(xc->getSyscallArg(0));
Addr tgt_buf = xc->getSyscallArg(1);
int tgt_nbytes = xc->getSyscallArg(2);
Addr tgt_basep = xc->getSyscallArg(3);
char * const host_buf = new char[tgt_nbytes];
// just pass basep through uninterpreted.
TypedBufferArg<int64_t> basep(tgt_basep);
basep.copyIn(xc->getMemPort());
long host_basep = (off_t)htog((int64_t)*basep);
int host_result = getdirentries(fd, host_buf, tgt_nbytes, &host_basep);
// check for error
if (host_result < 0) {
delete [] host_buf;
return -errno;
}
// no error: copy results back to target space
Addr tgt_buf_ptr = tgt_buf;
char *host_buf_ptr = host_buf;
char *host_buf_end = host_buf + host_result;
while (host_buf_ptr < host_buf_end) {
global_dirent *host_dp = (global_dirent *)host_buf_ptr;
int namelen = strlen(host_dp->d_name);
// Actual size includes padded string rounded up for alignment.
// Subtract 256 for dummy char array in Tru64::dirent definition.
// Add 1 to namelen for terminating null char.
int tgt_bufsize = sizeof(Tru64::dirent) - 256 + roundUp(namelen+1, 8);
TypedBufferArg<Tru64::dirent> tgt_dp(tgt_buf_ptr, tgt_bufsize);
tgt_dp->d_ino = host_dp->d_ino;
tgt_dp->d_reclen = tgt_bufsize;
tgt_dp->d_namlen = namelen;
strcpy(tgt_dp->d_name, host_dp->d_name);
tgt_dp.copyOut(xc->getMemPort());
tgt_buf_ptr += tgt_bufsize;
host_buf_ptr += host_dp->d_reclen;
}
delete [] host_buf;
*basep = htog((int64_t)host_basep);
basep.copyOut(xc->getMemPort());
return tgt_buf_ptr - tgt_buf;
#endif
}
/// Target sigreturn() handler.
static SyscallReturn
sigreturnFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
using namespace TheISA;
using TheISA::RegFile;
TypedBufferArg<Tru64::sigcontext> sc(xc->getSyscallArg(0));
sc.copyIn(xc->getMemPort());
// Restore state from sigcontext structure.
// Note that we'll advance PC <- NPC before the end of the cycle,
// so we need to restore the desired PC into NPC.
// The current regs->pc will get clobbered.
xc->setNextPC(htog(sc->sc_pc));
for (int i = 0; i < 31; ++i) {
xc->setIntReg(i, htog(sc->sc_regs[i]));
xc->setFloatRegBits(i, htog(sc->sc_fpregs[i]));
}
xc->setMiscReg(TheISA::Fpcr_DepTag, htog(sc->sc_fpcr));
return 0;
}
//
// Mach syscalls -- identified by negated syscall numbers
//
/// Create a stack region for a thread.
static SyscallReturn
stack_createFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
using namespace TheISA;
TypedBufferArg<Tru64::vm_stack> argp(xc->getSyscallArg(0));
argp.copyIn(xc->getMemPort());
// if the user chose an address, just let them have it. Otherwise
// pick one for them.
if (htog(argp->address) == 0) {
argp->address = htog(process->next_thread_stack_base);
int stack_size = (htog(argp->rsize) + htog(argp->ysize) +
htog(argp->gsize));
process->next_thread_stack_base -= stack_size;
argp.copyOut(xc->getMemPort());
}
return 0;
}
/// NXM library version stamp.
static
const int NXM_LIB_VERSION = 301003;
/// This call sets up the interface between the user and kernel
/// schedulers by creating a shared-memory region. The shared memory
/// region has several structs, some global, some per-RAD, some per-VP.
static SyscallReturn
nxm_task_initFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
using namespace std;
using namespace TheISA;
TypedBufferArg<Tru64::nxm_task_attr> attrp(xc->getSyscallArg(0));
TypedBufferArg<Addr> configptr_ptr(xc->getSyscallArg(1));
attrp.copyIn(xc->getMemPort());
if (gtoh(attrp->nxm_version) != NXM_LIB_VERSION) {
cerr << "nxm_task_init: thread library version mismatch! "
<< "got " << attrp->nxm_version
<< ", expected " << NXM_LIB_VERSION << endl;
abort();
}
if (gtoh(attrp->flags) != Tru64::NXM_TASK_INIT_VP) {
cerr << "nxm_task_init: bad flag value " << attrp->flags
<< " (expected " << Tru64::NXM_TASK_INIT_VP << ")" << endl;
abort();
}
const Addr base_addr = 0x12000; // was 0x3f0000000LL;
Addr cur_addr = base_addr; // next addresses to use
// first comes the config_info struct
Addr config_addr = cur_addr;
cur_addr += sizeof(Tru64::nxm_config_info);
// next comes the per-cpu state vector
Addr slot_state_addr = cur_addr;
int slot_state_size =
process->numCpus() * sizeof(Tru64::nxm_slot_state_t);
cur_addr += slot_state_size;
// now the per-RAD state struct (we only support one RAD)
cur_addr = 0x14000; // bump up addr for alignment
Addr rad_state_addr = cur_addr;
int rad_state_size =
(sizeof(Tru64::nxm_shared)
+ (process->numCpus()-1) * sizeof(Tru64::nxm_sched_state));
cur_addr += rad_state_size;
// now initialize a config_info struct and copy it out to user space
TypedBufferArg<Tru64::nxm_config_info> config(config_addr);
config->nxm_nslots_per_rad = htog(process->numCpus());
config->nxm_nrads = htog(1); // only one RAD in our system!
config->nxm_slot_state = htog(slot_state_addr);
config->nxm_rad[0] = htog(rad_state_addr);
config.copyOut(xc->getMemPort());
// initialize the slot_state array and copy it out
TypedBufferArg<Tru64::nxm_slot_state_t> slot_state(slot_state_addr,
slot_state_size);
for (int i = 0; i < process->numCpus(); ++i) {
// CPU 0 is bound to the calling process; all others are available
// XXX this code should have an endian conversion, but I don't think
// it works anyway
slot_state[i] =
(i == 0) ? Tru64::NXM_SLOT_BOUND : Tru64::NXM_SLOT_AVAIL;
}
slot_state.copyOut(xc->getMemPort());
// same for the per-RAD "shared" struct. Note that we need to
// allocate extra bytes for the per-VP array which is embedded at
// the end.
TypedBufferArg<Tru64::nxm_shared> rad_state(rad_state_addr,
rad_state_size);
rad_state->nxm_callback = attrp->nxm_callback;
rad_state->nxm_version = attrp->nxm_version;
rad_state->nxm_uniq_offset = attrp->nxm_uniq_offset;
for (int i = 0; i < process->numCpus(); ++i) {
Tru64::nxm_sched_state *ssp = &rad_state->nxm_ss[i];
ssp->nxm_u.sigmask = htog(0);
ssp->nxm_u.sig = htog(0);
ssp->nxm_u.flags = htog(0);
ssp->nxm_u.cancel_state = htog(0);
ssp->nxm_u.nxm_ssig = 0;
ssp->nxm_bits = htog(0);
ssp->nxm_quantum = attrp->nxm_quantum;
ssp->nxm_set_quantum = attrp->nxm_quantum;
ssp->nxm_sysevent = htog(0);
if (i == 0) {
uint64_t uniq = xc->readMiscReg(TheISA::Uniq_DepTag);
ssp->nxm_u.pth_id = htog(uniq + gtoh(attrp->nxm_uniq_offset));
ssp->nxm_u.nxm_active = htog(uniq | 1);
}
else {
ssp->nxm_u.pth_id = htog(0);
ssp->nxm_u.nxm_active = htog(0);
}
}
rad_state.copyOut(xc->getMemPort());
//
// copy pointer to shared config area out to user
//
*configptr_ptr = htog(config_addr);
configptr_ptr.copyOut(xc->getMemPort());
// Register this as a valid address range with the process
process->nxm_start = base_addr;
process->nxm_end = cur_addr;
return 0;
}
/// Initialize execution context.
static void
init_exec_context(ExecContext *ec,
Tru64::nxm_thread_attr *attrp, uint64_t uniq_val)
{
using namespace TheISA;
ec->clearArchRegs();
ec->setIntReg(TheISA::ArgumentReg0, gtoh(attrp->registers.a0));
ec->setIntReg(27/*t12*/, gtoh(attrp->registers.pc));
ec->setIntReg(TheISA::StackPointerReg, gtoh(attrp->registers.sp));
ec->setMiscReg(TheISA::Uniq_DepTag, uniq_val);
ec->setPC(gtoh(attrp->registers.pc));
ec->setNextPC(gtoh(attrp->registers.pc) + sizeof(TheISA::MachInst));
ec->activate();
}
/// Create thread.
static SyscallReturn
nxm_thread_createFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
using namespace std;
using namespace TheISA;
TypedBufferArg<Tru64::nxm_thread_attr> attrp(xc->getSyscallArg(0));
TypedBufferArg<uint64_t> kidp(xc->getSyscallArg(1));
int thread_index = xc->getSyscallArg(2);
// get attribute args
attrp.copyIn(xc->getMemPort());
if (gtoh(attrp->version) != NXM_LIB_VERSION) {
cerr << "nxm_thread_create: thread library version mismatch! "
<< "got " << attrp->version
<< ", expected " << NXM_LIB_VERSION << endl;
abort();
}
if (thread_index < 0 | thread_index > process->numCpus()) {
cerr << "nxm_thread_create: bad thread index " << thread_index
<< endl;
abort();
}
// On a real machine, the per-RAD shared structure is in
// shared memory, so both the user and kernel can get at it.
// We don't have that luxury, so we just copy it in and then
// back out again.
int rad_state_size =
(sizeof(Tru64::nxm_shared) +
(process->numCpus()-1) * sizeof(Tru64::nxm_sched_state));
TypedBufferArg<Tru64::nxm_shared> rad_state(0x14000,
rad_state_size);
rad_state.copyIn(xc->getMemPort());
uint64_t uniq_val = gtoh(attrp->pthid) - gtoh(rad_state->nxm_uniq_offset);
if (gtoh(attrp->type) == Tru64::NXM_TYPE_MANAGER) {
// DEC pthreads seems to always create one of these (in
// addition to N application threads), but we don't use it,
// so don't bother creating it.
// This is supposed to be a port number. Make something up.
*kidp = htog(99);
kidp.copyOut(xc->getMemPort());
return 0;
} else if (gtoh(attrp->type) == Tru64::NXM_TYPE_VP) {
// A real "virtual processor" kernel thread. Need to fork
// this thread on another CPU.
Tru64::nxm_sched_state *ssp = &rad_state->nxm_ss[thread_index];
if (gtoh(ssp->nxm_u.nxm_active) != 0)
return (int) Tru64::KERN_NOT_RECEIVER;
ssp->nxm_u.pth_id = attrp->pthid;
ssp->nxm_u.nxm_active = htog(uniq_val | 1);
rad_state.copyOut(xc->getMemPort());
Addr slot_state_addr = 0x12000 + sizeof(Tru64::nxm_config_info);
int slot_state_size =
process->numCpus() * sizeof(Tru64::nxm_slot_state_t);
TypedBufferArg<Tru64::nxm_slot_state_t>
slot_state(slot_state_addr,
slot_state_size);
slot_state.copyIn(xc->getMemPort());
if (slot_state[thread_index] != Tru64::NXM_SLOT_AVAIL) {
cerr << "nxm_thread_createFunc: requested VP slot "
<< thread_index << " not available!" << endl;
fatal("");
}
// XXX This should have an endian conversion but I think this code
// doesn't work anyway
slot_state[thread_index] = Tru64::NXM_SLOT_BOUND;
slot_state.copyOut(xc->getMemPort());
// Find a free simulator execution context.
for (int i = 0; i < process->numCpus(); ++i) {
ExecContext *xc = process->execContexts[i];
if (xc->status() == ExecContext::Unallocated) {
// inactive context... grab it
init_exec_context(xc, attrp, uniq_val);
// This is supposed to be a port number, but we'll try
// and get away with just sticking the thread index
// here.
*kidp = htog(thread_index);
kidp.copyOut(xc->getMemPort());
return 0;
}
}
// fell out of loop... no available inactive context
cerr << "nxm_thread_create: no idle contexts available." << endl;
abort();
} else {
cerr << "nxm_thread_create: can't handle thread type "
<< attrp->type << endl;
abort();
}
return 0;
}
/// Thread idle call (like yield()).
static SyscallReturn
nxm_idleFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
return 0;
}
/// Block thread.
static SyscallReturn
nxm_thread_blockFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
using namespace std;
uint64_t tid = xc->getSyscallArg(0);
uint64_t secs = xc->getSyscallArg(1);
uint64_t flags = xc->getSyscallArg(2);
uint64_t action = xc->getSyscallArg(3);
uint64_t usecs = xc->getSyscallArg(4);
cout << xc->getCpuPtr()->name() << ": nxm_thread_block " << tid << " "
<< secs << " " << flags << " " << action << " " << usecs << endl;
return 0;
}
/// block.
static SyscallReturn
nxm_blockFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
using namespace std;
Addr uaddr = xc->getSyscallArg(0);
uint64_t val = xc->getSyscallArg(1);
uint64_t secs = xc->getSyscallArg(2);
uint64_t usecs = xc->getSyscallArg(3);
uint64_t flags = xc->getSyscallArg(4);
BaseCPU *cpu = xc->getCpuPtr();
cout << cpu->name() << ": nxm_block "
<< hex << uaddr << dec << " " << val
<< " " << secs << " " << usecs
<< " " << flags << endl;
return 0;
}
/// Unblock thread.
static SyscallReturn
nxm_unblockFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
using namespace std;
Addr uaddr = xc->getSyscallArg(0);
cout << xc->getCpuPtr()->name() << ": nxm_unblock "
<< hex << uaddr << dec << endl;
return 0;
}
/// Switch thread priority.
static SyscallReturn
swtch_priFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
// Attempts to switch to another runnable thread (if there is
// one). Returns false if there are no other threads to run
// (i.e., the thread can reasonably spin-wait) or true if there
// are other threads.
//
// Since we assume at most one "kernel" thread per CPU, it's
// always safe to return false here.
return 0; //false;
}
/// Activate exec context waiting on a channel. Just activate one
/// by default.
static int
activate_waiting_context(Addr uaddr, Process *process,
bool activate_all = false)
{
using namespace std;
int num_activated = 0;
list<Process::WaitRec>::iterator i = process->waitList.begin();
list<Process::WaitRec>::iterator end = process->waitList.end();
while (i != end && (num_activated == 0 || activate_all)) {
if (i->waitChan == uaddr) {
// found waiting process: make it active
ExecContext *newCtx = i->waitingContext;
assert(newCtx->status() == ExecContext::Suspended);
newCtx->activate();
// get rid of this record
i = process->waitList.erase(i);
++num_activated;
} else {
++i;
}
}
return num_activated;
}
/// M5 hacked-up lock acquire.
static void
m5_lock_mutex(Addr uaddr, Process *process, ExecContext *xc)
{
using namespace TheISA;
TypedBufferArg<uint64_t> lockp(uaddr);
lockp.copyIn(xc->getMemPort());
if (gtoh(*lockp) == 0) {
// lock is free: grab it
*lockp = htog(1);
lockp.copyOut(xc->getMemPort());
} else {
// lock is busy: disable until free
process->waitList.push_back(Process::WaitRec(uaddr, xc));
xc->suspend();
}
}
/// M5 unlock call.
static void
m5_unlock_mutex(Addr uaddr, Process *process, ExecContext *xc)
{
TypedBufferArg<uint64_t> lockp(uaddr);
lockp.copyIn(xc->getMemPort());
assert(*lockp != 0);
// Check for a process waiting on the lock.
int num_waiting = activate_waiting_context(uaddr, process);
// clear lock field if no waiting context is taking over the lock
if (num_waiting == 0) {
*lockp = 0;
lockp.copyOut(xc->getMemPort());
}
}
/// Lock acquire syscall handler.
static SyscallReturn
m5_mutex_lockFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
Addr uaddr = xc->getSyscallArg(0);
m5_lock_mutex(uaddr, process, xc);
// Return 0 since we will always return to the user with the lock
// acquired. We will just keep the context inactive until that is
// true.
return 0;
}
/// Try lock (non-blocking).
static SyscallReturn
m5_mutex_trylockFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
using namespace TheISA;
Addr uaddr = xc->getSyscallArg(0);
TypedBufferArg<uint64_t> lockp(uaddr);
lockp.copyIn(xc->getMemPort());
if (gtoh(*lockp) == 0) {
// lock is free: grab it
*lockp = htog(1);
lockp.copyOut(xc->getMemPort());
return 0;
} else {
return 1;
}
}
/// Unlock syscall handler.
static SyscallReturn
m5_mutex_unlockFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
Addr uaddr = xc->getSyscallArg(0);
m5_unlock_mutex(uaddr, process, xc);
return 0;
}
/// Signal ocndition.
static SyscallReturn
m5_cond_signalFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
Addr cond_addr = xc->getSyscallArg(0);
// Wake up one process waiting on the condition variable.
activate_waiting_context(cond_addr, process);
return 0;
}
/// Wake up all processes waiting on the condition variable.
static SyscallReturn
m5_cond_broadcastFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
Addr cond_addr = xc->getSyscallArg(0);
activate_waiting_context(cond_addr, process, true);
return 0;
}
/// Wait on a condition.
static SyscallReturn
m5_cond_waitFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
using namespace TheISA;
Addr cond_addr = xc->getSyscallArg(0);
Addr lock_addr = xc->getSyscallArg(1);
TypedBufferArg<uint64_t> condp(cond_addr);
TypedBufferArg<uint64_t> lockp(lock_addr);
// user is supposed to acquire lock before entering
lockp.copyIn(xc->getMemPort());
assert(gtoh(*lockp) != 0);
m5_unlock_mutex(lock_addr, process, xc);
process->waitList.push_back(Process::WaitRec(cond_addr, xc));
xc->suspend();
return 0;
}
/// Thread exit.
static SyscallReturn
m5_thread_exitFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
assert(xc->status() == ExecContext::Active);
xc->deallocate();
return 0;
}
/// Indirect syscall invocation (call #0).
static SyscallReturn
indirectSyscallFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
int new_callnum = xc->getSyscallArg(0);
LiveProcess *lp = dynamic_cast<LiveProcess*>(process);
assert(lp);
for (int i = 0; i < 5; ++i)
xc->setSyscallArg(i, xc->getSyscallArg(i+1));
SyscallDesc *new_desc = lp->getDesc(new_callnum);
if (desc == NULL)
fatal("Syscall %d out of range", callnum);
new_desc->doSyscall(new_callnum, process, xc);
return 0;
}
}; // class Tru64
#endif // FULL_SYSTEM
#endif // __TRU64_HH__