minix/kernel/arch/i386/do_readbios.c
Ben Gras 6f77685609 Split of architecture-dependent and -independent functions for i386,
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
2006-12-22 15:22:27 +00:00

39 lines
1.1 KiB
C

/* The kernel call implemented in this file:
* m_type: SYS_READBIOS
*
* The parameters for this kernel call are:
* m2_i1: RDB_SIZE number of bytes to copy
* m2_l1: RDB_ADDR absolute address in BIOS area
* m2_p1: RDB_BUF buffer address in requesting process
*/
#include "../../system.h"
#include <minix/type.h>
/*===========================================================================*
* do_readbios *
*===========================================================================*/
PUBLIC int do_readbios(m_ptr)
register message *m_ptr; /* pointer to request message */
{
int proc_nr;
struct proc *p;
phys_bytes address, phys_buf, phys_bios;
vir_bytes buf;
size_t size;
address = m_ptr->RDB_ADDR;
buf = (vir_bytes)m_ptr->RDB_BUF;
size = m_ptr->RDB_SIZE;
okendpt(m_ptr->m_source, &proc_nr);
p = proc_addr(proc_nr);
phys_buf = umap_local(p, D, buf, size);
if (phys_buf == 0)
return EFAULT;
phys_bios = umap_bios(p, address, size);
if (phys_bios == 0)
return EPERM;
phys_copy(phys_bios, phys_buf, size);
return 0;
}