1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 *
4 * Copyright (C) 2010 John Crispin <john@phrozen.org>
5 */
6
7 #include <linux/export.h>
8 #include <linux/clk.h>
9 #include <linux/memblock.h>
10 #include <linux/of_fdt.h>
11
12 #include <asm/bootinfo.h>
13 #include <asm/time.h>
14 #include <asm/prom.h>
15
16 #include <lantiq.h>
17
18 #include "prom.h"
19 #include "clk.h"
20
21 /* access to the ebu needs to be locked between different drivers */
22 DEFINE_SPINLOCK(ebu_lock);
23 EXPORT_SYMBOL_GPL(ebu_lock);
24
25 /*
26 * This is needed by the VPE loader code, just set it to 0 and assume
27 * that the firmware hardcodes this value to something useful.
28 */
29 unsigned long physical_memsize = 0L;
30
31 /*
32 * this struct is filled by the soc specific detection code and holds
33 * information about the specific soc type, revision and name
34 */
35 static struct ltq_soc_info soc_info;
36
get_system_type(void)37 const char *get_system_type(void)
38 {
39 return soc_info.sys_type;
40 }
41
ltq_soc_type(void)42 int ltq_soc_type(void)
43 {
44 return soc_info.type;
45 }
46
prom_free_prom_memory(void)47 void __init prom_free_prom_memory(void)
48 {
49 }
50
prom_init_cmdline(void)51 static void __init prom_init_cmdline(void)
52 {
53 int argc = fw_arg0;
54 char **argv = (char **) KSEG1ADDR(fw_arg1);
55 int i;
56
57 arcs_cmdline[0] = '\0';
58
59 for (i = 0; i < argc; i++) {
60 char *p = (char *) KSEG1ADDR(argv[i]);
61
62 if (CPHYSADDR(p) && *p) {
63 strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
64 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
65 }
66 }
67 }
68
plat_mem_setup(void)69 void __init plat_mem_setup(void)
70 {
71 void *dtb;
72
73 ioport_resource.start = IOPORT_RESOURCE_START;
74 ioport_resource.end = IOPORT_RESOURCE_END;
75 iomem_resource.start = IOMEM_RESOURCE_START;
76 iomem_resource.end = IOMEM_RESOURCE_END;
77
78 set_io_port_base((unsigned long) KSEG1);
79
80 if (fw_passed_dtb) /* UHI interface */
81 dtb = (void *)fw_passed_dtb;
82 else if (&__dtb_start != &__dtb_end)
83 dtb = (void *)__dtb_start;
84 else
85 panic("no dtb found");
86
87 /*
88 * Load the devicetree. This causes the chosen node to be
89 * parsed resulting in our memory appearing
90 */
91 __dt_setup_arch(dtb);
92 }
93
device_tree_init(void)94 void __init device_tree_init(void)
95 {
96 unflatten_and_copy_device_tree();
97 }
98
prom_init(void)99 void __init prom_init(void)
100 {
101 /* call the soc specific detetcion code and get it to fill soc_info */
102 ltq_soc_detect(&soc_info);
103 snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s",
104 soc_info.name, soc_info.rev_type);
105 soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';
106 pr_info("SoC: %s\n", soc_info.sys_type);
107 prom_init_cmdline();
108
109 #if defined(CONFIG_MIPS_MT_SMP)
110 if (register_vsmp_smp_ops())
111 panic("failed to register_vsmp_smp_ops()");
112 #endif
113 }
114