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/idle.h>
 40#include <asm/reboot.h>
 41#include <asm/time.h>
 42#include <asm/bootinfo.h>
 43
 44#include <asm/netlogic/interrupt.h>
 45#include <asm/netlogic/psb-bootinfo.h>
 46#include <asm/netlogic/haldefs.h>
 47#include <asm/netlogic/common.h>
 48
 49#include <asm/netlogic/xlr/xlr.h>
 50#include <asm/netlogic/xlr/iomap.h>
 51#include <asm/netlogic/xlr/pic.h>
 52#include <asm/netlogic/xlr/gpio.h>
 53#include <asm/netlogic/xlr/fmn.h>
 54
 55uint64_t nlm_io_base = DEFAULT_NETLOGIC_IO_BASE;
 56struct psb_info nlm_prom_info;
 57
 58/* default to uniprocessor */
 59unsigned int  nlm_threads_per_core = 1;
 60struct nlm_soc_info nlm_nodes[NLM_NR_NODES];
 61cpumask_t nlm_cpumask = CPU_MASK_CPU0;
 62
 63static void nlm_linux_exit(void)
 64{
 65	uint64_t gpiobase;
 66
 67	gpiobase = nlm_mmio_base(NETLOGIC_IO_GPIO_OFFSET);
 68	/* trigger a chip reset by writing 1 to GPIO_SWRESET_REG */
 69	nlm_write_reg(gpiobase, GPIO_SWRESET_REG, 1);
 70	for ( ; ; )
 71		cpu_wait();
 72}
 73
 74void __init plat_mem_setup(void)
 75{
 76	_machine_restart = (void (*)(char *))nlm_linux_exit;
 77	_machine_halt	= nlm_linux_exit;
 78	pm_power_off	= nlm_linux_exit;
 79}
 80
 81const char *get_system_type(void)
 82{
 83	return "Netlogic XLR/XLS Series";
 84}
 85
 86unsigned int nlm_get_cpu_frequency(void)
 87{
 88	return (unsigned int)nlm_prom_info.cpu_frequency;
 89}
 90
 91void __init prom_free_prom_memory(void)
 92{
 93	/* Nothing yet */
 94}
 95
 96void nlm_percpu_init(int hwcpuid)
 97{
 98	if (hwcpuid % 4 == 0)
 99		xlr_percpu_fmn_init();
100}
101
102static void __init build_arcs_cmdline(int *argv)
103{
104	int i, remain, len;
105	char *arg;
106
107	remain = sizeof(arcs_cmdline) - 1;
108	arcs_cmdline[0] = '\0';
109	for (i = 0; argv[i] != 0; i++) {
110		arg = (char *)(long)argv[i];
111		len = strlen(arg);
112		if (len + 1 > remain)
113			break;
114		strcat(arcs_cmdline, arg);
115		strcat(arcs_cmdline, " ");
116		remain -=  len + 1;
117	}
118
119	/* Add the default options here */
120	if ((strstr(arcs_cmdline, "console=")) == NULL) {
121		arg = "console=ttyS0,38400 ";
122		len = strlen(arg);
123		if (len > remain)
124			goto fail;
125		strcat(arcs_cmdline, arg);
126		remain -= len;
127	}
128#ifdef CONFIG_BLK_DEV_INITRD
129	if ((strstr(arcs_cmdline, "rdinit=")) == NULL) {
130		arg = "rdinit=/sbin/init ";
131		len = strlen(arg);
132		if (len > remain)
133			goto fail;
134		strcat(arcs_cmdline, arg);
135		remain -= len;
136	}
137#endif
138	return;
139fail:
140	panic("Cannot add %s, command line too big!", arg);
141}
142
143static void prom_add_memory(void)
144{
145	struct nlm_boot_mem_map *bootm;
146	u64 start, size;
147	u64 pref_backup = 512;	/* avoid pref walking beyond end */
148	int i;
149
150	bootm = (void *)(long)nlm_prom_info.psb_mem_map;
151	for (i = 0; i < bootm->nr_map; i++) {
152		if (bootm->map[i].type != BOOT_MEM_RAM)
153			continue;
154		start = bootm->map[i].addr;
155		size   = bootm->map[i].size;
156
157		/* Work around for using bootloader mem */
158		if (i == 0 && start == 0 && size == 0x0c000000)
159			size = 0x0ff00000;
160
161		add_memory_region(start, size - pref_backup, BOOT_MEM_RAM);
162	}
163}
164
165static void nlm_init_node(void)
166{
167	struct nlm_soc_info *nodep;
168
169	nodep = nlm_current_node();
170	nodep->picbase = nlm_mmio_base(NETLOGIC_IO_PIC_OFFSET);
171	nodep->ebase = read_c0_ebase() & (~((1 << 12) - 1));
172	spin_lock_init(&nodep->piclock);
173}
174
175void __init prom_init(void)
176{
177	int *argv, *envp;		/* passed as 32 bit ptrs */
178	struct psb_info *prom_infop;
179	void *reset_vec;
180#ifdef CONFIG_SMP
181	int i;
182#endif
183
184	/* truncate to 32 bit and sign extend all args */
185	argv = (int *)(long)(int)fw_arg1;
186	envp = (int *)(long)(int)fw_arg2;
187	prom_infop = (struct psb_info *)(long)(int)fw_arg3;
188
189	nlm_prom_info = *prom_infop;
190	nlm_init_node();
191
192	/* Update reset entry point with CPU init code */
193	reset_vec = (void *)CKSEG1ADDR(RESET_VEC_PHYS);
194	memset(reset_vec, 0, RESET_VEC_SIZE);
195	memcpy(reset_vec, (void *)nlm_reset_entry,
196			(nlm_reset_entry_end - nlm_reset_entry));
197
198	build_arcs_cmdline(argv);
199	prom_add_memory();
200
201#ifdef CONFIG_SMP
202	for (i = 0; i < 32; i++)
203		if (nlm_prom_info.online_cpu_map & (1 << i))
204			cpumask_set_cpu(i, &nlm_cpumask);
205	nlm_wakeup_secondary_cpus();
206	register_smp_ops(&nlm_smp_ops);
207#endif
208	xlr_board_info_setup();
209	xlr_percpu_fmn_init();
210}