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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 
nlm_percpu_init(int hwcpuid)92 void nlm_percpu_init(int hwcpuid)
93 {
94 	if (hwcpuid % 4 == 0)
95 		xlr_percpu_fmn_init();
96 }
97 
build_arcs_cmdline(int * argv)98 static void __init build_arcs_cmdline(int *argv)
99 {
100 	int i, remain, len;
101 	char *arg;
102 
103 	remain = sizeof(arcs_cmdline) - 1;
104 	arcs_cmdline[0] = '\0';
105 	for (i = 0; argv[i] != 0; i++) {
106 		arg = (char *)(long)argv[i];
107 		len = strlen(arg);
108 		if (len + 1 > remain)
109 			break;
110 		strcat(arcs_cmdline, arg);
111 		strcat(arcs_cmdline, " ");
112 		remain -=  len + 1;
113 	}
114 
115 	/* Add the default options here */
116 	if ((strstr(arcs_cmdline, "console=")) == NULL) {
117 		arg = "console=ttyS0,38400 ";
118 		len = strlen(arg);
119 		if (len > remain)
120 			goto fail;
121 		strcat(arcs_cmdline, arg);
122 		remain -= len;
123 	}
124 #ifdef CONFIG_BLK_DEV_INITRD
125 	if ((strstr(arcs_cmdline, "rdinit=")) == NULL) {
126 		arg = "rdinit=/sbin/init ";
127 		len = strlen(arg);
128 		if (len > remain)
129 			goto fail;
130 		strcat(arcs_cmdline, arg);
131 		remain -= len;
132 	}
133 #endif
134 	return;
135 fail:
136 	panic("Cannot add %s, command line too big!", arg);
137 }
138 
prom_add_memory(void)139 static void prom_add_memory(void)
140 {
141 	struct nlm_boot_mem_map *bootm;
142 	u64 start, size;
143 	u64 pref_backup = 512;	/* avoid pref walking beyond end */
144 	int i;
145 
146 	bootm = (void *)(long)nlm_prom_info.psb_mem_map;
147 	for (i = 0; i < bootm->nr_map; i++) {
148 		if (bootm->map[i].type != NLM_BOOT_MEM_RAM)
149 			continue;
150 		start = bootm->map[i].addr;
151 		size   = bootm->map[i].size;
152 
153 		/* Work around for using bootloader mem */
154 		if (i == 0 && start == 0 && size == 0x0c000000)
155 			size = 0x0ff00000;
156 
157 		memblock_add(start, size - pref_backup);
158 	}
159 }
160 
nlm_init_node(void)161 static void nlm_init_node(void)
162 {
163 	struct nlm_soc_info *nodep;
164 
165 	nodep = nlm_current_node();
166 	nodep->picbase = nlm_mmio_base(NETLOGIC_IO_PIC_OFFSET);
167 	nodep->ebase = read_c0_ebase() & MIPS_EBASE_BASE;
168 	spin_lock_init(&nodep->piclock);
169 }
170 
prom_init(void)171 void __init prom_init(void)
172 {
173 	int *argv, *envp;		/* passed as 32 bit ptrs */
174 	struct psb_info *prom_infop;
175 	void *reset_vec;
176 #ifdef CONFIG_SMP
177 	int i;
178 #endif
179 
180 	/* truncate to 32 bit and sign extend all args */
181 	argv = (int *)(long)(int)fw_arg1;
182 	envp = (int *)(long)(int)fw_arg2;
183 	prom_infop = (struct psb_info *)(long)(int)fw_arg3;
184 
185 	nlm_prom_info = *prom_infop;
186 	nlm_init_node();
187 
188 	/* Update reset entry point with CPU init code */
189 	reset_vec = (void *)CKSEG1ADDR(RESET_VEC_PHYS);
190 	memset(reset_vec, 0, RESET_VEC_SIZE);
191 	memcpy(reset_vec, (void *)nlm_reset_entry,
192 			(nlm_reset_entry_end - nlm_reset_entry));
193 
194 	build_arcs_cmdline(argv);
195 	prom_add_memory();
196 
197 #ifdef CONFIG_SMP
198 	for (i = 0; i < 32; i++)
199 		if (nlm_prom_info.online_cpu_map & (1 << i))
200 			cpumask_set_cpu(i, &nlm_cpumask);
201 	nlm_wakeup_secondary_cpus();
202 	register_smp_ops(&nlm_smp_ops);
203 #endif
204 	xlr_board_info_setup();
205 	xlr_percpu_fmn_init();
206 }
207