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initialize atomic counters and enable Lubashevsky barrier

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This commit is contained in:
Stefan Lankes 2011-11-08 06:49:40 -08:00
parent d24958f8b1
commit 9e286a567e
1 changed files with 19 additions and 2 deletions
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21
arch/x86/mm/svm.c
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@ -161,10 +161,26 @@ int svm_init(void)
if (!RCCE_IAM)
memset((void*)page_owner, 0x00, OWNER_SIZE);
// initialize svm barrier
incregs = (volatile atomic_increg_t*) map_region(0, 0xF900E000, 2, MAP_KERNEL_SPACE|MAP_NO_CACHE);
if (BUILTIN_EXPECT(!incregs, 0)) {
flags = irq_nested_disable();
RCCE_shfree((t_vcharp) phyaddr);
irq_nested_enable(flags);
return -ENOMEM;
}
kprintf("Map atomic counters at 0x%x\n", incregs);
// iRCCE is not thread save => disable interrupts
flags = irq_nested_disable();
RCCE_barrier(&RCCE_COMM_WORLD);
RCCE_flag_alloc(&release);
irq_nested_enable(flags);
/* INIT: yafbarrier */
incregs[AIREG1].initializer = 0;
incregs[AIREG2].initializer = 0;
RCCE_barrier(&RCCE_COMM_WORLD);
return 0;
}
@ -426,7 +442,8 @@ int svm_barrier(uint32_t type)
svm_invalidate();
}
#if 0
#if 1
// Lubachevsky barrier with flags
index = !index;
if (incregs[AIREG1].counter > (comm->size - 2)) {
incregs[AIREG1].initializer = 0;