1/*
  2 * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
  3 * reserved.
  4 *
  5 * This software is available to you under a choice of one of two
  6 * licenses.  You may choose to be licensed under the terms of the GNU
  7 * General Public License (GPL) Version 2, available from the file
  8 * COPYING in the main directory of this source tree, or the NetLogic
  9 * license below:
 10 *
 11 * Redistribution and use in source and binary forms, with or without
 12 * modification, are permitted provided that the following conditions
 13 * are met:
 14 *
 15 * 1. Redistributions of source code must retain the above copyright
 16 *    notice, this list of conditions and the following disclaimer.
 17 * 2. Redistributions in binary form must reproduce the above copyright
 18 *    notice, this list of conditions and the following disclaimer in
 19 *    the documentation and/or other materials provided with the
 20 *    distribution.
 21 *
 22 * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 25 * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 29 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 31 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 32 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 33 */
 34
 35#include <linux/kernel.h>
 36#include <linux/serial_8250.h>
 37#include <linux/pm.h>
 38
 39#include <asm/reboot.h>
 40#include <asm/time.h>
 41#include <asm/bootinfo.h>
 42
 43#include <linux/of_fdt.h>
 44
 45#include <asm/netlogic/haldefs.h>
 46#include <asm/netlogic/common.h>
 47
 48#include <asm/netlogic/xlp-hal/iomap.h>
 49#include <asm/netlogic/xlp-hal/xlp.h>
 50#include <asm/netlogic/xlp-hal/sys.h>
 51
 52unsigned long nlm_common_ebase = 0x0;
 53
 54/* default to uniprocessor */
 55uint32_t nlm_coremask = 1, nlm_cpumask  = 1;
 56int  nlm_threads_per_core = 1;
 57
 58static void nlm_linux_exit(void)
 59{
 60	nlm_write_sys_reg(nlm_sys_base, SYS_CHIP_RESET, 1);
 61	for ( ; ; )
 62		cpu_wait();
 63}
 64
 65void __init plat_mem_setup(void)
 66{
 67	panic_timeout	= 5;
 68	_machine_restart = (void (*)(char *))nlm_linux_exit;
 69	_machine_halt	= nlm_linux_exit;
 70	pm_power_off	= nlm_linux_exit;
 71}
 72
 73const char *get_system_type(void)
 74{
 75	return "Netlogic XLP Series";
 76}
 77
 78void __init prom_free_prom_memory(void)
 79{
 80	/* Nothing yet */
 81}
 82
 83void xlp_mmu_init(void)
 84{
 85	/* enable extended TLB and Large Fixed TLB */
 86	write_c0_config6(read_c0_config6() | 0x24);
 87
 88	/* set page mask of Fixed TLB in config7 */
 89	write_c0_config7(PM_DEFAULT_MASK >>
 90		(13 + (ffz(PM_DEFAULT_MASK >> 13) / 2)));
 91}
 92
 93void __init prom_init(void)
 94{
 95	void *fdtp;
 96
 97	fdtp = (void *)(long)fw_arg0;
 98	xlp_mmu_init();
 99	nlm_hal_init();
100	early_init_devtree(fdtp);
101
102	nlm_common_ebase = read_c0_ebase() & (~((1 << 12) - 1));
103#ifdef CONFIG_SMP
104	nlm_wakeup_secondary_cpus(0xffffffff);
105
106	/* update TLB size after waking up threads */
107	current_cpu_data.tlbsize = ((read_c0_config6() >> 16) & 0xffff) + 1;
108
109	register_smp_ops(&nlm_smp_ops);
110#endif
111}