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Changed do_devio not to require DIO_TYPE, but to extract type

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from DIO_REQUEST. Also do_vdevio. Also do_sdevio, but this
function also supports grant id's and offsets.

do_segctl: rename protected to prot.

do_umap: support for GRANT_SEG umap.

do_privctl: support SYS_PRIV_SET_GRANTS, which sets location and size
of in-own-address-space grant table.

do_safecopy: functions to verify and perform 'safe' (grant-based) copies.
This commit is contained in:
Ben Gras
2006-06-20 10:03:10 +00:00
parent ada6592af9
commit 3061d7b17a
8 changed files with 345 additions and 37 deletions
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31
kernel/system/do_devio.c
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@@ -3,7 +3,6 @@
*
* The parameters for this kernel call are:
* m2_i3: DIO_REQUEST (request input or output)
* m2_i1: DIO_TYPE (flag indicating byte, word, or long)
* m2_l1: DIO_PORT (port to read/ write)
* m2_l2: DIO_VALUE (value to write/ return value read)
*/
@@ -25,6 +24,10 @@ register message *m_ptr; /* pointer to request message */
port_t port;
struct io_range *iorp;
int i, size, nr_io_range;
int io_type, io_dir;
io_type = m_ptr->DIO_REQUEST & _DIO_TYPEMASK;
io_dir = m_ptr->DIO_REQUEST & _DIO_DIRMASK;
rp= proc_addr(who_p);
privp= priv(rp);
@@ -35,11 +38,11 @@ register message *m_ptr; /* pointer to request message */
}
if (privp->s_flags & CHECK_IO_PORT)
{
switch (m_ptr->DIO_TYPE)
switch (io_type)
{
case DIO_BYTE: size= 1; break;
case DIO_WORD: size= 2; break;
case DIO_LONG: size= 4; break;
case _DIO_BYTE: size= 1; break;
case _DIO_WORD: size= 2; break;
case _DIO_LONG: size= 4; break;
default: size= 4; break; /* Be conservative */
}
port= m_ptr->DIO_PORT;
@@ -61,18 +64,18 @@ register message *m_ptr; /* pointer to request message */
doit:
/* Process a single I/O request for byte, word, and long values. */
if (m_ptr->DIO_REQUEST == DIO_INPUT) {
switch (m_ptr->DIO_TYPE) {
case DIO_BYTE: m_ptr->DIO_VALUE = inb(m_ptr->DIO_PORT); break;
case DIO_WORD: m_ptr->DIO_VALUE = inw(m_ptr->DIO_PORT); break;
case DIO_LONG: m_ptr->DIO_VALUE = inl(m_ptr->DIO_PORT); break;
if (io_dir == _DIO_INPUT) {
switch (io_type) {
case _DIO_BYTE: m_ptr->DIO_VALUE = inb(m_ptr->DIO_PORT); break;
case _DIO_WORD: m_ptr->DIO_VALUE = inw(m_ptr->DIO_PORT); break;
case _DIO_LONG: m_ptr->DIO_VALUE = inl(m_ptr->DIO_PORT); break;
default: return(EINVAL);
}
} else {
switch (m_ptr->DIO_TYPE) {
case DIO_BYTE: outb(m_ptr->DIO_PORT, m_ptr->DIO_VALUE); break;
case DIO_WORD: outw(m_ptr->DIO_PORT, m_ptr->DIO_VALUE); break;
case DIO_LONG: outl(m_ptr->DIO_PORT, m_ptr->DIO_VALUE); break;
switch (io_type) {
case _DIO_BYTE: outb(m_ptr->DIO_PORT, m_ptr->DIO_VALUE); break;
case _DIO_WORD: outw(m_ptr->DIO_PORT, m_ptr->DIO_VALUE); break;
case _DIO_LONG: outl(m_ptr->DIO_PORT, m_ptr->DIO_VALUE); break;
default: return(EINVAL);
}
}