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/memblock.h>
38 #include <linux/pm.h>
39
40 #include <asm/idle.h>
41 #include <asm/reboot.h>
42 #include <asm/time.h>
43 #include <asm/bootinfo.h>
44
45 #include <asm/netlogic/interrupt.h>
46 #include <asm/netlogic/psb-bootinfo.h>
47 #include <asm/netlogic/haldefs.h>
48 #include <asm/netlogic/common.h>
49
50 #include <asm/netlogic/xlr/xlr.h>
51 #include <asm/netlogic/xlr/iomap.h>
52 #include <asm/netlogic/xlr/pic.h>
53 #include <asm/netlogic/xlr/gpio.h>
54 #include <asm/netlogic/xlr/fmn.h>
55
56 uint64_t nlm_io_base = DEFAULT_NETLOGIC_IO_BASE;
57 struct psb_info nlm_prom_info;
58
59 /* default to uniprocessor */
60 unsigned int nlm_threads_per_core = 1;
61 struct nlm_soc_info nlm_nodes[NLM_NR_NODES];
62 cpumask_t nlm_cpumask = CPU_MASK_CPU0;
63
nlm_linux_exit(void)64 static void nlm_linux_exit(void)
65 {
66 uint64_t gpiobase;
67
68 gpiobase = nlm_mmio_base(NETLOGIC_IO_GPIO_OFFSET);
69 /* trigger a chip reset by writing 1 to GPIO_SWRESET_REG */
70 nlm_write_reg(gpiobase, GPIO_SWRESET_REG, 1);
71 for ( ; ; )
72 cpu_wait();
73 }
74
plat_mem_setup(void)75 void __init plat_mem_setup(void)
76 {
77 _machine_restart = (void (*)(char *))nlm_linux_exit;
78 _machine_halt = nlm_linux_exit;
79 pm_power_off = nlm_linux_exit;
80 }
81
get_system_type(void)82 const char *get_system_type(void)
83 {
84 return "Netlogic XLR/XLS Series";
85 }
86
nlm_get_cpu_frequency(void)87 unsigned int nlm_get_cpu_frequency(void)
88 {
89 return (unsigned int)nlm_prom_info.cpu_frequency;
90 }
91
prom_free_prom_memory(void)92 void __init prom_free_prom_memory(void)
93 {
94 /* Nothing yet */
95 }
96
nlm_percpu_init(int hwcpuid)97 void nlm_percpu_init(int hwcpuid)
98 {
99 if (hwcpuid % 4 == 0)
100 xlr_percpu_fmn_init();
101 }
102
build_arcs_cmdline(int * argv)103 static void __init build_arcs_cmdline(int *argv)
104 {
105 int i, remain, len;
106 char *arg;
107
108 remain = sizeof(arcs_cmdline) - 1;
109 arcs_cmdline[0] = '\0';
110 for (i = 0; argv[i] != 0; i++) {
111 arg = (char *)(long)argv[i];
112 len = strlen(arg);
113 if (len + 1 > remain)
114 break;
115 strcat(arcs_cmdline, arg);
116 strcat(arcs_cmdline, " ");
117 remain -= len + 1;
118 }
119
120 /* Add the default options here */
121 if ((strstr(arcs_cmdline, "console=")) == NULL) {
122 arg = "console=ttyS0,38400 ";
123 len = strlen(arg);
124 if (len > remain)
125 goto fail;
126 strcat(arcs_cmdline, arg);
127 remain -= len;
128 }
129 #ifdef CONFIG_BLK_DEV_INITRD
130 if ((strstr(arcs_cmdline, "rdinit=")) == NULL) {
131 arg = "rdinit=/sbin/init ";
132 len = strlen(arg);
133 if (len > remain)
134 goto fail;
135 strcat(arcs_cmdline, arg);
136 remain -= len;
137 }
138 #endif
139 return;
140 fail:
141 panic("Cannot add %s, command line too big!", arg);
142 }
143
prom_add_memory(void)144 static void prom_add_memory(void)
145 {
146 struct nlm_boot_mem_map *bootm;
147 u64 start, size;
148 u64 pref_backup = 512; /* avoid pref walking beyond end */
149 int i;
150
151 bootm = (void *)(long)nlm_prom_info.psb_mem_map;
152 for (i = 0; i < bootm->nr_map; i++) {
153 if (bootm->map[i].type != NLM_BOOT_MEM_RAM)
154 continue;
155 start = bootm->map[i].addr;
156 size = bootm->map[i].size;
157
158 /* Work around for using bootloader mem */
159 if (i == 0 && start == 0 && size == 0x0c000000)
160 size = 0x0ff00000;
161
162 memblock_add(start, size - pref_backup);
163 }
164 }
165
nlm_init_node(void)166 static void nlm_init_node(void)
167 {
168 struct nlm_soc_info *nodep;
169
170 nodep = nlm_current_node();
171 nodep->picbase = nlm_mmio_base(NETLOGIC_IO_PIC_OFFSET);
172 nodep->ebase = read_c0_ebase() & MIPS_EBASE_BASE;
173 spin_lock_init(&nodep->piclock);
174 }
175
prom_init(void)176 void __init prom_init(void)
177 {
178 int *argv, *envp; /* passed as 32 bit ptrs */
179 struct psb_info *prom_infop;
180 void *reset_vec;
181 #ifdef CONFIG_SMP
182 int i;
183 #endif
184
185 /* truncate to 32 bit and sign extend all args */
186 argv = (int *)(long)(int)fw_arg1;
187 envp = (int *)(long)(int)fw_arg2;
188 prom_infop = (struct psb_info *)(long)(int)fw_arg3;
189
190 nlm_prom_info = *prom_infop;
191 nlm_init_node();
192
193 /* Update reset entry point with CPU init code */
194 reset_vec = (void *)CKSEG1ADDR(RESET_VEC_PHYS);
195 memset(reset_vec, 0, RESET_VEC_SIZE);
196 memcpy(reset_vec, (void *)nlm_reset_entry,
197 (nlm_reset_entry_end - nlm_reset_entry));
198
199 build_arcs_cmdline(argv);
200 prom_add_memory();
201
202 #ifdef CONFIG_SMP
203 for (i = 0; i < 32; i++)
204 if (nlm_prom_info.online_cpu_map & (1 << i))
205 cpumask_set_cpu(i, &nlm_cpumask);
206 nlm_wakeup_secondary_cpus();
207 register_smp_ops(&nlm_smp_ops);
208 #endif
209 xlr_board_info_setup();
210 xlr_percpu_fmn_init();
211 }
212