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[SPARC64]: Sun4v cross-call sending support.

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Technically the hypervisor call supports sending in a list
of all cpus to get the cross-call, but I only pass in one
cpu at a time for now.

The multi-cpu support is there, just ifdef'd out so it's easy to
enable or delete it later.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2006-02-08 16:41:20 -08:00
parent 5b0c0572fc
commit 1d2f1f90a1
4 changed files with 163 additions and 4 deletions
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22
arch/sparc64/kernel/irq.c
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@@ -900,6 +900,24 @@ static void __cpuinit init_one_kbuf(unsigned long *pa_ptr)
*pa_ptr = __pa(page);
}
static void __cpuinit init_cpu_send_mondo_info(struct trap_per_cpu *tb)
{
#ifdef CONFIG_SMP
unsigned long page;
BUILD_BUG_ON((NR_CPUS * sizeof(u16)) > (PAGE_SIZE - 64));
page = get_zeroed_page(GFP_ATOMIC);
if (!page) {
prom_printf("SUN4V: Error, cannot allocate cpu mondo page.\n");
prom_halt();
}
tb->cpu_mondo_block_pa = __pa(page);
tb->cpu_list_pa = __pa(page + 64);
#endif
}
/* Allocate and init the mondo and error queues for this cpu. */
void __cpuinit sun4v_init_mondo_queues(void)
{
@@ -908,10 +926,14 @@ void __cpuinit sun4v_init_mondo_queues(void)
init_one_mondo(&tb->cpu_mondo_pa, HV_CPU_QUEUE_CPU_MONDO);
init_one_mondo(&tb->dev_mondo_pa, HV_CPU_QUEUE_DEVICE_MONDO);
init_one_mondo(&tb->resum_mondo_pa, HV_CPU_QUEUE_RES_ERROR);
init_one_kbuf(&tb->resum_kernel_buf_pa);
init_one_mondo(&tb->nonresum_mondo_pa, HV_CPU_QUEUE_NONRES_ERROR);
init_one_kbuf(&tb->nonresum_kernel_buf_pa);
init_cpu_send_mondo_info(tb);
}
/* Only invoked on boot processor. */