sysadmin/ipxe
1
0
Fork 0
mirror of https://github.com/ipxe/ipxe synced 2025-12-26 01:22:37 +03:00
Code Issues Packages Projects Releases Wiki Activity

Use the magic of common symbols to allow struct dev to effectively grow at

Browse Source 
link time to accommodate whatever bus objects are included.
This commit is contained in:
Michael Brown
2005-04-14 10:10:54 +00:00
parent 0dc98309b2
commit 75d864432c
8 changed files with 84 additions and 49 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
src/drivers/bus/eisa.c
View File

@@ -13,6 +13,14 @@
#define DBG(...)
#endif
/*
* Ensure that there is sufficient space in the shared dev_bus
* structure for a struct pci_device.
*
*/
DEV_BUS( struct eisa_device, eisa_dev );
static char eisa_magic[0]; /* guaranteed unique symbol */
/*
* Fill in parameters for an EISA device based on slot number
*
@@ -52,15 +60,14 @@ static int fill_eisa_device ( struct eisa_device *eisa ) {
* Obtain a struct eisa * from a struct dev *
*
* If dev has not previously been used for an EISA device scan, blank
* out dev.eisa
* out struct eisa
*/
struct eisa_device * eisa_device ( struct dev *dev ) {
struct eisa_device *eisa = &dev->eisa;
struct eisa_device *eisa = dev->bus;;
if ( dev->devid.bus_type != EISA_BUS_TYPE ) {
if ( eisa->magic != eisa_magic ) {
memset ( eisa, 0, sizeof ( *eisa ) );
dev->devid.bus_type = EISA_BUS_TYPE;
eisa->slot = EISA_MIN_SLOT;
eisa->magic = eisa_magic;
}
eisa->dev = dev;
return eisa;
@@ -74,8 +81,13 @@ int find_eisa_device ( struct eisa_device *eisa, struct eisa_driver *driver ) {
unsigned int i;
/* Iterate through all possible EISA slots, starting where we
* left off/
* left off. If eisa->slot is zero (which it will be if we
* have a zeroed structure), start from slot EISA_MIN_SLOT,
* since slot 0 doesn't exist.
*/
if ( ! eisa->slot ) {
eisa->slot = EISA_MIN_SLOT;
}
for ( ; eisa->slot <= EISA_MAX_SLOT ; eisa->slot++ ) {
/* If we've already used this device, skip it */
if ( eisa->already_tried ) {
@@ -101,6 +113,8 @@ int find_eisa_device ( struct eisa_device *eisa, struct eisa_driver *driver ) {
eisa->prod_id ) );
if ( eisa->dev ) {
eisa->dev->name = driver->name;
eisa->dev->devid.bus_type
= ISA_BUS_TYPE;
eisa->dev->devid.vendor_id
= eisa->mfg_id;
eisa->dev->devid.device_id