minix/lib/syslib/pci_init1.c
Cristiano Giuffrida c5b309ff07 Merge of Wu's GSOC 09 branch (src.20090525.r4372.wu)
Main changes:
- COW optimization for safecopy.
- safemap, a grant-based interface for sharing memory regions between processes.
- Integration with safemap and complete rework of DS, supporting new data types
  natively (labels, memory ranges, memory mapped ranges).
- For further information:
  http://wiki.minix3.org/en/SummerOfCode2009/MemoryGrants

Additional changes not included in the original Wu's branch:
- Fixed unhandled case in VM when using COW optimization for safecopy in case
  of a block that has already been shared as SMAP.
- Better interface and naming scheme for sys_saferevmap and ds_retrieve_map
  calls.
- Better input checking in syslib: check for page alignment when creating
  memory mapping grants.
- DS notifies subscribers when an entry is deleted.
- Documented the behavior of indirect grants in case of memory mapping.
- Test suite in /usr/src/test/safeperf|safecopy|safemap|ds/* reworked
  and extended.
- Minor fixes and general cleanup.
- TO-DO: Grant ids should be generated and managed the way endpoints are to make
sure grant slots are never misreused.
2010-01-14 15:24:16 +00:00

46 lines
1,000 B
C

/*
pci_init1.c
*/
#include "pci.h"
#include "syslib.h"
#include <string.h>
#include <unistd.h>
#include <minix/ds.h>
#include <minix/sysutil.h>
int pci_procnr= ANY;
/*===========================================================================*
* pci_init1 *
*===========================================================================*/
PUBLIC void pci_init1(name)
char *name;
{
int r;
u32_t u32;
size_t len;
message m;
r= ds_retrieve_label_num("pci", &u32);
if (r != 0)
panic("syslib/" __FILE__, "pci_init1: ds_retrieve_label_num failed for 'pci'", r);
pci_procnr= u32;
m.m_type= BUSC_PCI_INIT;
len= strlen(name);
if (len+1 <= sizeof(m.m3_ca1))
strcpy(m.m3_ca1, name);
else
{
len= sizeof(m.m3_ca1)-1;
memcpy(m.m3_ca1, name, len);
m.m3_ca1[len]= '\0';
}
r= sendrec(pci_procnr, &m);
if (r != 0)
panic("syslib/" __FILE__, "pci_init1: can't talk to PCI", r);
if (m.m_type != 0)
panic("syslib/" __FILE__, "pci_init1: got bad reply from PCI", m.m_type);
}