1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * linux/arch/m68knommu/kernel/setup.c |
4 | * |
5 | * Copyright (C) 1999-2007 Greg Ungerer (gerg@snapgear.com) |
6 | * Copyright (C) 1998,1999 D. Jeff Dionne <jeff@uClinux.org> |
7 | * Copyleft ()) 2000 James D. Schettine {james@telos-systems.com} |
8 | * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> |
9 | * Copyright (C) 1995 Hamish Macdonald |
10 | * Copyright (C) 2000 Lineo Inc. (www.lineo.com) |
11 | * Copyright (C) 2001 Lineo, Inc. <www.lineo.com> |
12 | * |
13 | * 68VZ328 Fixes/support Evan Stawnyczy <e@lineo.ca> |
14 | */ |
15 | |
16 | /* |
17 | * This file handles the architecture-dependent parts of system setup |
18 | */ |
19 | |
20 | #include <linux/kernel.h> |
21 | #include <linux/sched.h> |
22 | #include <linux/delay.h> |
23 | #include <linux/interrupt.h> |
24 | #include <linux/fb.h> |
25 | #include <linux/module.h> |
26 | #include <linux/mm.h> |
27 | #include <linux/console.h> |
28 | #include <linux/errno.h> |
29 | #include <linux/string.h> |
30 | #include <linux/memblock.h> |
31 | #include <linux/seq_file.h> |
32 | #include <linux/init.h> |
33 | #include <linux/initrd.h> |
34 | #include <linux/root_dev.h> |
35 | #include <linux/rtc.h> |
36 | |
37 | #include <asm/setup.h> |
38 | #include <asm/bootinfo.h> |
39 | #include <asm/irq.h> |
40 | #include <asm/machdep.h> |
41 | #include <asm/sections.h> |
42 | |
43 | unsigned long memory_start; |
44 | unsigned long memory_end; |
45 | |
46 | EXPORT_SYMBOL(memory_start); |
47 | EXPORT_SYMBOL(memory_end); |
48 | |
49 | char __initdata command_line[COMMAND_LINE_SIZE]; |
50 | |
51 | /* machine dependent timer functions */ |
52 | void (*mach_sched_init)(void) __initdata = NULL; |
53 | |
54 | /* machine dependent reboot functions */ |
55 | void (*mach_reset)(void); |
56 | void (*mach_halt)(void); |
57 | |
58 | #ifdef CONFIG_M68000 |
59 | #if defined(CONFIG_M68328) |
60 | #define CPU_NAME "MC68328" |
61 | #elif defined(CONFIG_M68EZ328) |
62 | #define CPU_NAME "MC68EZ328" |
63 | #elif defined(CONFIG_M68VZ328) |
64 | #define CPU_NAME "MC68VZ328" |
65 | #else |
66 | #define CPU_NAME "MC68000" |
67 | #endif |
68 | #endif /* CONFIG_M68000 */ |
69 | #ifndef CPU_NAME |
70 | #define CPU_NAME "UNKNOWN" |
71 | #endif |
72 | |
73 | /* |
74 | * Different cores have different instruction execution timings. |
75 | * The old/traditional 68000 cores are basically all the same, at 16. |
76 | * The ColdFire cores vary a little, their values are defined in their |
77 | * headers. We default to the standard 68000 value here. |
78 | */ |
79 | #ifndef CPU_INSTR_PER_JIFFY |
80 | #define CPU_INSTR_PER_JIFFY 16 |
81 | #endif |
82 | |
83 | void __init setup_arch(char **cmdline_p) |
84 | { |
85 | memory_start = PAGE_ALIGN(_ramstart); |
86 | memory_end = _ramend; |
87 | |
88 | setup_initial_init_mm(start_code: _stext, end_code: _etext, end_data: _edata, NULL); |
89 | |
90 | config_BSP(&command_line[0], sizeof(command_line)); |
91 | |
92 | #if defined(CONFIG_BOOTPARAM) |
93 | strscpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line)); |
94 | #endif /* CONFIG_BOOTPARAM */ |
95 | |
96 | process_uboot_commandline(&command_line[0], sizeof(command_line)); |
97 | |
98 | pr_info("uClinux with CPU " CPU_NAME "\n" ); |
99 | |
100 | #ifdef CONFIG_UCDIMM |
101 | pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n" ); |
102 | #endif |
103 | #ifdef CONFIG_M68328 |
104 | pr_info("68328 support D. Jeff Dionne <jeff@uclinux.org>\n" ); |
105 | pr_info("68328 support Kenneth Albanowski <kjahds@kjshds.com>\n" ); |
106 | #endif |
107 | #ifdef CONFIG_M68EZ328 |
108 | pr_info("68EZ328 DragonBallEZ support (C) 1999 Rt-Control, Inc\n" ); |
109 | #endif |
110 | #ifdef CONFIG_M68VZ328 |
111 | pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n" ); |
112 | pr_info("68VZ328 DragonBallVZ support (c) 2001 Lineo, Inc.\n" ); |
113 | #endif |
114 | #ifdef CONFIG_COLDFIRE |
115 | pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n" ); |
116 | #ifdef CONFIG_M5307 |
117 | pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n" ); |
118 | #endif |
119 | #ifdef CONFIG_ELITE |
120 | pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n" ); |
121 | #endif |
122 | #endif |
123 | pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n" ); |
124 | |
125 | #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 ) |
126 | pr_info("68328/Pilot support Bernhard Kuhn <kuhn@lpr.e-technik.tu-muenchen.de>\n" ); |
127 | pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n" ); |
128 | #endif |
129 | #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 ) |
130 | pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n" ); |
131 | #endif |
132 | #ifdef CONFIG_DRAGEN2 |
133 | pr_info("DragonEngine II board support by Georges Menie\n" ); |
134 | #endif |
135 | #ifdef CONFIG_M5235EVB |
136 | pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n" ); |
137 | #endif |
138 | |
139 | pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n" , |
140 | _stext, _etext, _sdata, _edata, __bss_start, __bss_stop); |
141 | pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n " , |
142 | __bss_stop, memory_start, memory_start, memory_end); |
143 | |
144 | memblock_add(base: _rambase, size: memory_end - _rambase); |
145 | memblock_reserve(base: _rambase, size: memory_start - _rambase); |
146 | |
147 | /* Keep a copy of command line */ |
148 | *cmdline_p = &command_line[0]; |
149 | memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); |
150 | boot_command_line[COMMAND_LINE_SIZE-1] = 0; |
151 | |
152 | /* |
153 | * Give all the memory to the bootmap allocator, tell it to put the |
154 | * boot mem_map at the start of memory. |
155 | */ |
156 | min_low_pfn = PFN_DOWN(memory_start); |
157 | max_pfn = max_low_pfn = PFN_DOWN(memory_end); |
158 | |
159 | #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD) |
160 | if ((initrd_start > 0) && (initrd_start < initrd_end) && |
161 | (initrd_end < memory_end)) |
162 | memblock_reserve(initrd_start, initrd_end - initrd_start); |
163 | #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ |
164 | |
165 | /* |
166 | * Get kmalloc into gear. |
167 | */ |
168 | paging_init(); |
169 | } |
170 | |
171 | /* |
172 | * Get CPU information for use by the procfs. |
173 | */ |
174 | static int show_cpuinfo(struct seq_file *m, void *v) |
175 | { |
176 | char *cpu, *mmu, *fpu; |
177 | u_long clockfreq; |
178 | |
179 | cpu = CPU_NAME; |
180 | mmu = "none" ; |
181 | fpu = "none" ; |
182 | clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY; |
183 | |
184 | seq_printf(m, fmt: "CPU:\t\t%s\n" |
185 | "MMU:\t\t%s\n" |
186 | "FPU:\t\t%s\n" |
187 | "Clocking:\t%lu.%1luMHz\n" |
188 | "BogoMips:\t%lu.%02lu\n" |
189 | "Calibration:\t%lu loops\n" , |
190 | cpu, mmu, fpu, |
191 | clockfreq / 1000000, |
192 | (clockfreq / 100000) % 10, |
193 | (loops_per_jiffy * HZ) / 500000, |
194 | ((loops_per_jiffy * HZ) / 5000) % 100, |
195 | (loops_per_jiffy * HZ)); |
196 | |
197 | return 0; |
198 | } |
199 | |
200 | static void *c_start(struct seq_file *m, loff_t *pos) |
201 | { |
202 | return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; |
203 | } |
204 | |
205 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
206 | { |
207 | ++*pos; |
208 | return c_start(m, pos); |
209 | } |
210 | |
211 | static void c_stop(struct seq_file *m, void *v) |
212 | { |
213 | } |
214 | |
215 | const struct seq_operations cpuinfo_op = { |
216 | .start = c_start, |
217 | .next = c_next, |
218 | .stop = c_stop, |
219 | .show = show_cpuinfo, |
220 | }; |
221 | |
222 | |