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 <asm/netlogic/interrupt.h>
44#include <asm/netlogic/psb-bootinfo.h>
45#include <asm/netlogic/haldefs.h>
46#include <asm/netlogic/common.h>
47
48#include <asm/netlogic/xlr/xlr.h>
49#include <asm/netlogic/xlr/iomap.h>
50#include <asm/netlogic/xlr/pic.h>
51#include <asm/netlogic/xlr/gpio.h>
52
53uint64_t nlm_io_base = DEFAULT_NETLOGIC_IO_BASE;
54uint64_t nlm_pic_base;
55struct psb_info nlm_prom_info;
56
57unsigned long nlm_common_ebase = 0x0;
58
59/* default to uniprocessor */
60uint32_t nlm_coremask = 1, nlm_cpumask  = 1;
61int  nlm_threads_per_core = 1;
62
63static void __init nlm_early_serial_setup(void)
64{
65	struct uart_port s;
66	unsigned long uart_base;
67
68	uart_base = (unsigned long)nlm_mmio_base(NETLOGIC_IO_UART_0_OFFSET);
69	memset(&s, 0, sizeof(s));
70	s.flags		= ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
71	s.iotype	= UPIO_MEM32;
72	s.regshift	= 2;
73	s.irq		= PIC_UART_0_IRQ;
74	s.uartclk	= PIC_CLKS_PER_SEC;
75	s.serial_in	= nlm_xlr_uart_in;
76	s.serial_out	= nlm_xlr_uart_out;
77	s.mapbase	= uart_base;
78	s.membase	= (unsigned char __iomem *)uart_base;
79	early_serial_setup(&s);
80}
81
82static void nlm_linux_exit(void)
83{
84	uint64_t gpiobase;
85
86	gpiobase = nlm_mmio_base(NETLOGIC_IO_GPIO_OFFSET);
87	/* trigger a chip reset by writing 1 to GPIO_SWRESET_REG */
88	nlm_write_reg(gpiobase, NETLOGIC_GPIO_SWRESET_REG, 1);
89	for ( ; ; )
90		cpu_wait();
91}
92
93void __init plat_mem_setup(void)
94{
95	panic_timeout	= 5;
96	_machine_restart = (void (*)(char *))nlm_linux_exit;
97	_machine_halt	= nlm_linux_exit;
98	pm_power_off	= nlm_linux_exit;
99}
100
101const char *get_system_type(void)
102{
103	return "Netlogic XLR/XLS Series";
104}
105
106unsigned int nlm_get_cpu_frequency(void)
107{
108	return (unsigned int)nlm_prom_info.cpu_frequency;
109}
110
111void __init prom_free_prom_memory(void)
112{
113	/* Nothing yet */
114}
115
116static void __init build_arcs_cmdline(int *argv)
117{
118	int i, remain, len;
119	char *arg;
120
121	remain = sizeof(arcs_cmdline) - 1;
122	arcs_cmdline[0] = '\0';
123	for (i = 0; argv[i] != 0; i++) {
124		arg = (char *)(long)argv[i];
125		len = strlen(arg);
126		if (len + 1 > remain)
127			break;
128		strcat(arcs_cmdline, arg);
129		strcat(arcs_cmdline, " ");
130		remain -=  len + 1;
131	}
132
133	/* Add the default options here */
134	if ((strstr(arcs_cmdline, "console=")) == NULL) {
135		arg = "console=ttyS0,38400 ";
136		len = strlen(arg);
137		if (len > remain)
138			goto fail;
139		strcat(arcs_cmdline, arg);
140		remain -= len;
141	}
142#ifdef CONFIG_BLK_DEV_INITRD
143	if ((strstr(arcs_cmdline, "rdinit=")) == NULL) {
144		arg = "rdinit=/sbin/init ";
145		len = strlen(arg);
146		if (len > remain)
147			goto fail;
148		strcat(arcs_cmdline, arg);
149		remain -= len;
150	}
151#endif
152	return;
153fail:
154	panic("Cannot add %s, command line too big!", arg);
155}
156
157static void prom_add_memory(void)
158{
159	struct nlm_boot_mem_map *bootm;
160	u64 start, size;
161	u64 pref_backup = 512;  /* avoid pref walking beyond end */
162	int i;
163
164	bootm = (void *)(long)nlm_prom_info.psb_mem_map;
165	for (i = 0; i < bootm->nr_map; i++) {
166		if (bootm->map[i].type != BOOT_MEM_RAM)
167			continue;
168		start = bootm->map[i].addr;
169		size   = bootm->map[i].size;
170
171		/* Work around for using bootloader mem */
172		if (i == 0 && start == 0 && size == 0x0c000000)
173			size = 0x0ff00000;
174
175		add_memory_region(start, size - pref_backup, BOOT_MEM_RAM);
176	}
177}
178
179void __init prom_init(void)
180{
181	int *argv, *envp;		/* passed as 32 bit ptrs */
182	struct psb_info *prom_infop;
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_pic_base = nlm_mmio_base(NETLOGIC_IO_PIC_OFFSET);
191
192	nlm_early_serial_setup();
193	build_arcs_cmdline(argv);
194	nlm_common_ebase = read_c0_ebase() & (~((1 << 12) - 1));
195	prom_add_memory();
196
197#ifdef CONFIG_SMP
198	nlm_wakeup_secondary_cpus(nlm_prom_info.online_cpu_map);
199	register_smp_ops(&nlm_smp_ops);
200#endif
201}
202