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Add (untested) UNDI loader C-level implementation.

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This commit is contained in:
Michael Brown
2007-07-03 23:41:35 +01:00
parent 7db6b4b79c
commit dca470cb21
3 changed files with 64 additions and 74 deletions
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35
src/interface/pxe/pxe_preboot.c
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@@ -45,6 +45,9 @@
*/
static char *pxe_ris_filename = NULL;
/* Avoid dragging in isapnp.o unnecessarily */
uint16_t isapnp_read_port;
/**
* UNLOAD BASE CODE STACK
*
@@ -180,9 +183,6 @@ PXENV_EXIT_t pxenv_restart_tftp ( struct s_PXENV_TFTP_READ_FILE
* Status: working
*/
PXENV_EXIT_t pxenv_start_undi ( struct s_PXENV_START_UNDI *start_undi ) {
unsigned int isapnp_read_port;
unsigned int isapnp_csn;
unsigned int pci_busdevfn;
unsigned int bus_type;
unsigned int location;
struct net_device *netdev;
@@ -190,26 +190,25 @@ PXENV_EXIT_t pxenv_start_undi ( struct s_PXENV_START_UNDI *start_undi ) {
DBG ( "PXENV_START_UNDI %04x:%04x:%04x",
start_undi->AX, start_undi->BX, start_undi->DX );
/* Probe for devices, etc. */
startup();
/* Determine bus type and location */
isapnp_read_port = start_undi->DX;
isapnp_csn = start_undi->BX;
pci_busdevfn = start_undi->AX;
/* Use a heuristic to decide whether we are PCI or ISAPnP */
if ( ( isapnp_read_port >= ISAPNP_READ_PORT_MIN ) &&
( isapnp_read_port <= ISAPNP_READ_PORT_MAX ) &&
( isapnp_csn >= ISAPNP_CSN_MIN ) &&
( isapnp_csn <= ISAPNP_CSN_MAX ) ) {
/* Determine bus type and location. Use a heuristic to decide
* whether we are PCI or ISAPnP
*/
if ( ( start_undi->DX >= ISAPNP_READ_PORT_MIN ) &&
( start_undi->DX <= ISAPNP_READ_PORT_MAX ) &&
( start_undi->BX >= ISAPNP_CSN_MIN ) &&
( start_undi->BX <= ISAPNP_CSN_MAX ) ) {
bus_type = BUS_TYPE_ISAPNP;
location = isapnp_csn;
location = start_undi->BX;
/* Record ISAPnP read port for use by isapnp.c */
isapnp_read_port = start_undi->DX;
} else {
bus_type = BUS_TYPE_PCI;
location = pci_busdevfn;
location = start_undi->AX;
}
/* Probe for devices, etc. */
startup();
/* Look for a matching net device */
netdev = find_netdev_by_location ( bus_type, location );
if ( ! netdev ) {