Minix/minix
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Basic VM and other minor improvements.

Browse Source 
Not complete, probably not fully debugged or optimized.
This commit is contained in:
Ben Gras
2008-11-19 12:26:10 +00:00
parent c888305e21
commit c078ec0331
273 changed files with 10814 additions and 4305 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
kernel/system/do_vdevio.c
View File

@@ -36,14 +36,13 @@ register message *m_ptr; /* pointer to request message */
int vec_size; /* size of vector */
int io_in; /* true if input */
size_t bytes; /* # bytes to be copied */
vir_bytes caller_vir; /* virtual address at caller */
phys_bytes caller_phys; /* physical address at caller */
port_t port;
int i, j, io_size, nr_io_range;
int io_dir, io_type;
struct proc *rp;
struct priv *privp;
struct io_range *iorp;
int r;
/* Get the request, size of the request vector, and check the values. */
io_dir = m_ptr->DIO_REQUEST & _DIO_DIRMASK;
@@ -69,11 +68,10 @@ register message *m_ptr; /* pointer to request message */
}
if (bytes > sizeof(vdevio_buf)) return(E2BIG);
/* Calculate physical addresses and copy (port,value)-pairs from user. */
caller_vir = (vir_bytes) m_ptr->DIO_VEC_ADDR;
caller_phys = umap_local(proc_addr(who_p), D, caller_vir, bytes);
if (0 == caller_phys) return(EFAULT);
phys_copy(caller_phys, vir2phys(vdevio_buf), (phys_bytes) bytes);
/* Copy (port,value)-pairs from user. */
if((r=data_copy(who_e, (vir_bytes) m_ptr->DIO_VEC_ADDR,
SYSTEM, (vir_bytes) vdevio_buf, bytes)) != OK)
return r;
rp= proc_addr(who_p);
privp= priv(rp);
@@ -110,7 +108,20 @@ register message *m_ptr; /* pointer to request message */
* the entire switch is wrapped in lock() and unlock() to prevent the I/O
* batch from being interrupted.
*/
lock(13, "do_vdevio");
#if 0
if(who_e == 71091) {
static int vd = 0;
if(vd++ < 100) {
kprintf("proc %d does vdevio no %d; type %d, direction %s\n",
who_e, vd, io_type, io_in ? "input" : "output");
kprintf("(");
for (i=0; i<vec_size; i++)
kprintf("%2d:0x%x,0x%x ", i, pvb[i].port, pvb[i].value);
kprintf(")\n");
}
}
#endif
lock;
switch (io_type) {
case _DIO_BYTE: /* byte values */
if (io_in) for (i=0; i<vec_size; i++)
@@ -158,14 +169,18 @@ register message *m_ptr; /* pointer to request message */
}
}
}
unlock(13);
unlock;
/* Almost done, copy back results for input requests. */
if (io_in) phys_copy(vir2phys(vdevio_buf), caller_phys, (phys_bytes) bytes);
if (io_in)
if((r=data_copy(SYSTEM, (vir_bytes) vdevio_buf,
who_e, (vir_bytes) m_ptr->DIO_VEC_ADDR,
(phys_bytes) bytes)) != OK)
return r;
return(OK);
bad:
panic("do_vdevio: unaligned port\n", port);
minix_panic("do_vdevio: unaligned port", port);
return EPERM;
}