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[phantom] Skip command PEG initialisation if PEG is already running

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It is possible for the BIOS to use the UNDI API to bring up the NIC
prior to system boot.  If this happens, UNM_NIC_REG_CMDPEG_STATE will
contain the value 0xf00f (UNM_NIC_REG_CMDPEG_STATE_INITIALIZE_ACK),
and we should skip initialising the command PEG.
This commit is contained in:
Michael Brown 2008-09-23 23:36:55 +01:00
parent 8b20e5d2b7
commit 4011f9d956
1 changed files with 11 additions and 0 deletions
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11
src/drivers/net/phantom/phantom.c
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@ -1673,6 +1673,17 @@ static int phantom_init_cmdpeg ( struct phantom_nic *phantom ) {
uint32_t cmdpeg_state;
uint32_t last_cmdpeg_state = 0;
/* Check for a previous initialisation. This could have
* happened if, for example, the BIOS used the UNDI API to
* drive the NIC prior to a full PXE boot.
*/
cmdpeg_state = phantom_readl ( phantom, UNM_NIC_REG_CMDPEG_STATE );
if ( cmdpeg_state == UNM_NIC_REG_CMDPEG_STATE_INITIALIZE_ACK ) {
DBGC ( phantom, "Phantom %p command PEG already initialized\n",
phantom );
return 0;
}
/* If this was a cold boot, check that the hardware came up ok */
cold_boot = phantom_readl ( phantom, UNM_CAM_RAM_COLD_BOOT );
if ( cold_boot == UNM_CAM_RAM_COLD_BOOT_MAGIC ) {