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/*
* Copyright (c) 2010 Joel Sing <jsing@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/mutex.h>
#include <machine/cpu.h>
#include <machine/cpufunc.h>
#include <machine/iomod.h>
#include <machine/intr.h>
#include <machine/mutex.h>
#include <machine/reg.h>
void hppa_ipi_nop(void);
void (*ipifunc[HPPA_NIPI])(void) =
{
hppa_ipi_nop
};
void
hppa_ipi_init(struct cpu_info *ci)
{
/* Initialise IPIs for given CPU. */
mtx_init(&ci->ci_ipi_mtx, IPL_IPI);
ci->ci_mask |= (1 << 30);
}
int
hppa_ipi_intr(void *arg)
{
struct cpu_info *ci = curcpu();
u_long ipi_pending;
int bit = 0;
/* Handle an IPI. */
mtx_enter(&ci->ci_ipi_mtx);
ipi_pending = ci->ci_ipi;
ci->ci_ipi = 0;
mtx_leave(&ci->ci_ipi_mtx);
while (ipi_pending) {
if (ipi_pending & (1L << bit))
(*ipifunc[bit])();
ipi_pending &= ~(1L << bit);
bit++;
}
return 1;
}
int
hppa_ipi_send(struct cpu_info *ci, u_long ipi)
{
struct iomod *cpu;
if (!(ci->ci_flags & CPUF_RUNNING))
return -1;
mtx_enter(&ci->ci_ipi_mtx);
ci->ci_ipi |= (1L << ipi);
asm volatile ("sync" ::: "memory");
mtx_leave(&ci->ci_ipi_mtx);
/* Send an IPI to the specified CPU by triggering EIR{1} (irq 30). */
cpu = (struct iomod *)(ci->ci_hpa);
cpu->io_eir = 1;
asm volatile ("sync" ::: "memory");
return 0;
}
void
hppa_ipi_nop(void)
{
}
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