mainly in the kernel and headers. This split based on work by Ingmar Alting <iaalting@cs.vu.nl> done for his Minix PowerPC architecture port. . kernel does not program the interrupt controller directly, do any other architecture-dependent operations, or contain assembly any more, but uses architecture-dependent functions in arch/$(ARCH)/. . architecture-dependent constants and types defined in arch/$(ARCH)/include. . <ibm/portio.h> moved to <minix/portio.h>, as they have become, for now, architecture-independent functions. . int86, sdevio, readbios, and iopenable are now i386-specific kernel calls and live in arch/i386/do_* now. . i386 arch now supports even less 86 code; e.g. mpx86.s and klib86.s have gone, and 'machine.protected' is gone (and always taken to be 1 in i386). If 86 support is to return, it should be a new architecture. . prototypes for the architecture-dependent functions defined in kernel/arch/$(ARCH)/*.c but used in kernel/ are in kernel/proto.h . /etc/make.conf included in makefiles and shell scripts that need to know the building architecture; it defines ARCH=<arch>, currently only i386. . some basic per-architecture build support outside of the kernel (lib) . in clock.c, only dequeue a process if it was ready . fixes for new include files files deleted: . mpx/klib.s - only for choosing between mpx/klib86 and -386 . klib86.s - only for 86 i386-specific files files moved (or arch-dependent stuff moved) to arch/i386/: . mpx386.s (entry point) . klib386.s . sconst.h . exception.c . protect.c . protect.h . i8269.c
87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/* The kernel call implemented in this file:
|
|
* m_type: SYS_DEVIO
|
|
*
|
|
* The parameters for this kernel call are:
|
|
* m2_i3: DIO_REQUEST (request input or output)
|
|
* m2_l1: DIO_PORT (port to read/ write)
|
|
* m2_l2: DIO_VALUE (value to write/ return value read)
|
|
*/
|
|
|
|
#include "../system.h"
|
|
#include <minix/devio.h>
|
|
#include <minix/endpoint.h>
|
|
#include <minix/portio.h>
|
|
|
|
#if USE_DEVIO
|
|
|
|
/*===========================================================================*
|
|
* do_devio *
|
|
*===========================================================================*/
|
|
PUBLIC int do_devio(m_ptr)
|
|
register message *m_ptr; /* pointer to request message */
|
|
{
|
|
struct proc *rp;
|
|
struct priv *privp;
|
|
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);
|
|
if (!privp)
|
|
{
|
|
kprintf("no priv structure!\n");
|
|
goto doit;
|
|
}
|
|
if (privp->s_flags & CHECK_IO_PORT)
|
|
{
|
|
switch (io_type)
|
|
{
|
|
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;
|
|
nr_io_range= privp->s_nr_io_range;
|
|
for (i= 0, iorp= privp->s_io_tab; i<nr_io_range; i++, iorp++)
|
|
{
|
|
if (port >= iorp->ior_base && port+size-1 <= iorp->ior_limit)
|
|
break;
|
|
}
|
|
if (i >= nr_io_range)
|
|
{
|
|
kprintf(
|
|
"do_devio: I/O port check failed for proc %d, port 0x%x\n",
|
|
m_ptr->m_source, port);
|
|
return EPERM;
|
|
}
|
|
}
|
|
|
|
doit:
|
|
|
|
/* Process a single I/O request for byte, word, and long values. */
|
|
if (io_dir == _DIO_INPUT) {
|
|
switch (io_type) {
|
|
/* maybe "it" should not be called ports */
|
|
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 (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);
|
|
}
|
|
}
|
|
return(OK);
|
|
}
|
|
|
|
#endif /* USE_DEVIO */
|