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[IA64-SGI] - New SN hardware support - cpu_relax 

Add a few missing calls to "hint @pause".

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
hifive-unleashed-5.1
Jack Steiner 2005-08-11 10:28:00 -07:00 committed by Tony Luck
parent 7e95b9d6e2
commit 68b9753f47
4 changed files with 6 additions and 3 deletions
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1
arch/ia64/sn/kernel/bte.c
View File

@ -215,6 +215,7 @@ retry_bteop:
}
while ((transfer_stat = *bte->most_rcnt_na) == BTE_WORD_BUSY) {
cpu_relax();
if (ia64_get_itc() > itc_end) {
BTE_PRINTK(("BTE timeout nasid 0x%x bte%d IBLS = 0x%lx na 0x%lx\n",
NASID_GET(bte->bte_base_addr), bte->bte_num,

2
arch/ia64/sn/kernel/huberror.c
View File

@ -76,7 +76,7 @@ void hubiio_crb_free(struct hubdev_info *hubdev_info, int crbnum)
*/
REMOTE_HUB_S(hubdev_info->hdi_nasid, IIO_ICDR, (IIO_ICDR_PND | crbnum));
while (REMOTE_HUB_L(hubdev_info->hdi_nasid, IIO_ICDR) & IIO_ICDR_PND)
udelay(1);
cpu_relax();
}

3
arch/ia64/sn/pci/pcibr/pcibr_dma.c
View File

@ -317,7 +317,8 @@ void sn_dma_flush(uint64_t addr)
*(volatile uint32_t *)(p->sfdl_force_int_addr) = 1;
/* wait for the interrupt to come back. */
while (*(p->sfdl_flush_addr) != 0x10f) ;
while (*(p->sfdl_flush_addr) != 0x10f)
cpu_relax();
/* okay, everything is synched up. */
spin_unlock_irqrestore((spinlock_t *)&p->sfdl_flush_lock, flags);

3
include/asm-ia64/sn/sn_sal.h
View File

@ -749,7 +749,8 @@ ia64_sn_power_down(void)
{
struct ia64_sal_retval ret_stuff;
SAL_CALL(ret_stuff, SN_SAL_SYSTEM_POWER_DOWN, 0, 0, 0, 0, 0, 0, 0);
while(1);
while(1)
cpu_relax();
/* never returns */
}