/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright 2021 Joyent, Inc.
 */

/*
 * sun4u common CPC subroutines.
 */

#include <sys/types.h>
#include <sys/time.h>
#include <sys/atomic.h>
#include <sys/thread.h>
#include <sys/regset.h>
#include <sys/archsystm.h>
#include <sys/machsystm.h>
#include <sys/cpc_impl.h>
#include <sys/cpc_ultra.h>
#include <sys/sunddi.h>
#include <sys/intr.h>
#include <sys/ivintr.h>
#include <sys/x_call.h>
#include <sys/cpuvar.h>
#include <sys/machcpuvar.h>
#include <sys/cpc_pcbe.h>
#include <sys/modctl.h>
#include <sys/sdt.h>

uint64_t	cpc_level15_inum = 0;	/* used in interrupt.s */
int		cpc_has_overflow_intr;	/* set in cheetah.c */

extern kcpc_ctx_t *kcpc_overflow_intr(caddr_t arg, uint64_t bitmap);
extern int kcpc_counts_include_idle;

/*
 * Called on the boot CPU during startup.
 */
void
kcpc_hw_init(void)
{
	if ((cpc_has_overflow_intr) && (cpc_level15_inum == 0)) {
		cpc_level15_inum = add_softintr(PIL_15,
		    kcpc_hw_overflow_intr, NULL, SOFTINT_MT);
	}

	/*
	 * Make sure the boot CPU gets set up.
	 */
	kcpc_hw_startup_cpu(CPU->cpu_flags);
}

/*
 * Prepare for CPC interrupts and install an idle thread CPC context.
 */
void
kcpc_hw_startup_cpu(ushort_t cpflags)
{
	cpu_t		*cp = CPU;
	kthread_t	*t = cp->cpu_idle_thread;

	ASSERT(t->t_bound_cpu == cp);

	if (cpc_has_overflow_intr && (cpflags & CPU_FROZEN) == 0) {
		int pstate_save = disable_vec_intr();

		ASSERT(cpc_level15_inum != 0);

		intr_enqueue_req(PIL_15, cpc_level15_inum);
		enable_vec_intr(pstate_save);
	}

	mutex_init(&cp->cpu_cpc_ctxlock, "cpu_cpc_ctxlock", MUTEX_DEFAULT, 0);

	if (kcpc_counts_include_idle)
		return;

	kcpc_idle_ctxop_install(t, cp);
}

/*
 * Examine the processor and load an appropriate PCBE.
 */
int
kcpc_hw_load_pcbe(void)
{
	char		modname[MODMAXNAMELEN+1];
	char		*p, *q;
	int		len, stat;
	extern char	*boot_cpu_compatible_list;

	for (stat = -1, p = boot_cpu_compatible_list; p != NULL; p = q) {
		/*
		 * Get next CPU module name from boot_cpu_compatible_list
		 */
		q = strchr(p, ':');
		len = (q) ? (q - p) : strlen(p);
		if (len < sizeof (modname)) {
			(void) strncpy(modname, p, len);
			modname[len] = '\0';
			stat = kcpc_pcbe_tryload(modname, 0, 0, 0);
			if (stat == 0)
				break;
		}
		if (q)
			q++;			/* skip over ':' */
	}
	return (stat);

}

/*ARGSUSED*/
int
kcpc_hw_cpu_hook(processorid_t cpuid, ulong_t *kcpc_cpumap)
{
	return (0);
}

int
kcpc_hw_lwp_hook(void)
{
	return (0);
}