static int __init vr41xx_cmu_init(void)
{
unsigned long start, size;
switch (current_cpu_type()) {
case CPU_VR4111:
case CPU_VR4121:
start = CMU_TYPE1_BASE;
size = CMU_TYPE1_SIZE;
break;
case CPU_VR4122:
case CPU_VR4131:
start = CMU_TYPE2_BASE;
size = CMU_TYPE2_SIZE;
break;
case CPU_VR4133:
start = CMU_TYPE3_BASE;
size = CMU_TYPE3_SIZE;
break;
default:
panic("Unexpected CPU of NEC VR4100 series");
break;
}
if (request_mem_region(start, size, "CMU") == NULL)
return -EBUSY;
cmu_base = ioremap(start, size);
if (cmu_base == NULL) {
release_mem_region(start, size);
return -EBUSY;
}
cmuclkmsk = cmu_read(CMUCLKMSK);
if (current_cpu_type() == CPU_VR4133)
cmuclkmsk2 = cmu_read(CMUCLKMSK2);
spin_lock_init(&cmu_lock);
return 0;
}
asmlinkage ssize_t sys_read(unsigned int fd, char * buf, size_t count)
{
ssize_t ret;
struct file * file;
struct vms_fd * vms_fd;
ret = -EBADF;
vms_fd = fget(fd);
int cmu_read();
if (vms_fd->vfd$l_is_cmu)
return cmu_read(fd, buf, count);
file = vms_fd->vfd$l_fd_p;
#if 0
if (file && ((struct _fcb *)(file))->fcb$b_type==DYN$C_FCB)
goto do_fcb;
#else
#if 0
printk("sys_read %x %x %x %x\n",ctl$gl_pcb,fd,buf,count);
#endif
int sts = 0;
int curcount = count;
int retcount = 0;
struct _rabdef * rab = file;
struct _fabdef * fab = rab->rab$l_fab;
char * kbuf = kmalloc(fab->fab$w_mrs, GFP_KERNEL); // check size
while (curcount>0) {
rab->rab$l_ubf = kbuf;
rab->rab$w_usz = curcount;
#if 0
printk("mrs %x %x\n",fab, fab->fab$w_mrs);
#endif
#if 0
if (curcount < fab->fab$w_mrs)
rab->rab$w_usz = fab->fab$w_mrs;
#else
if (count > 1)
if (fab->fab$w_mrs)
rab->rab$w_usz = fab->fab$w_mrs;
#endif
if (count > 1) // temp kludge for read 1
sts = exe$get(rab);
else
sts = exe$read(rab);
if ((sts&1)==0)
break;
int thiscount = rab->rab$w_rsz;
if (curcount < rab->rab$w_rsz)
thiscount = curcount;
memcpy(buf + retcount, kbuf, thiscount);
#if 0
printk("memcpy %x %x %x\n",buf + retcount, kbuf, thiscount);
#endif
curcount -= thiscount;
retcount += thiscount;
if (fab->fab$w_mrs == 0) {
#if 0
printk("memcpy2 %x %x %x\n", retcount, curcount, thiscount);
#endif
curcount = 0;
}
}
kfree(kbuf);
#if 0
printk("sys_read end %x %x %x %x\n",ctl$gl_pcb,fd,sts,retcount);
#endif
#define RMS$_EOF 98938
if (sts == RMS$_EOF)
return retcount;
if (sts & 1) {
return retcount;
} else
return 0;
#endif
if (file) {
if (file->f_mode & FMODE_READ) {
if (fd<3) goto skip;
ret = 0;
if (!ret) {
skip: {}
ssize_t (*read)(struct file *, char *, size_t, loff_t *);
ret = -EINVAL;
if (file->f_op && (read = file->f_op->read) != NULL)
ret = read(file, buf, count, &file->f_pos);
}
}
if (fd<3) goto skip2;
fput(file);
skip2: {}
}
return ret;
#if 0
do_fcb:
{}
struct _fcb * fcb;
unsigned long offset;
ret = -EBADF;
file = fget(fd);
fcb = file;
offset = fcb->fcb$l_reserve1;
ret = rms_kernel_read(file, offset, buf, count);
fcb->fcb$l_reserve1 += ret;
return ret;
#endif
}