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
55 uint64_t nlm_io_base = DEFAULT_NETLOGIC_IO_BASE;
56 struct psb_info nlm_prom_info;
57
58 /* default to uniprocessor */
59 unsigned int nlm_threads_per_core = 1;
60 struct nlm_soc_info nlm_nodes[NLM_NR_NODES];
61 cpumask_t nlm_cpumask = CPU_MASK_CPU0;
62
nlm_linux_exit(void)63 static 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
plat_mem_setup(void)74 void __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
get_system_type(void)81 const char *get_system_type(void)
82 {
83 return "Netlogic XLR/XLS Series";
84 }
85
nlm_get_cpu_frequency(void)86 unsigned int nlm_get_cpu_frequency(void)
87 {
88 return (unsigned int)nlm_prom_info.cpu_frequency;
89 }
90
prom_free_prom_memory(void)91 void __init prom_free_prom_memory(void)
92 {
93 /* Nothing yet */
94 }
95
nlm_percpu_init(int hwcpuid)96 void nlm_percpu_init(int hwcpuid)
97 {
98 if (hwcpuid % 4 == 0)
99 xlr_percpu_fmn_init();
100 }
101
build_arcs_cmdline(int * argv)102 static 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;
139 fail:
140 panic("Cannot add %s, command line too big!", arg);
141 }
142
prom_add_memory(void)143 static 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
nlm_init_node(void)165 static 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
prom_init(void)175 void __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 }
211