Commit | Line | Data |
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9b6b563c PM |
1 | /* |
2 | * Common prep/pmac/chrp boot and setup code. | |
3 | */ | |
4 | ||
5 | #include <linux/config.h> | |
6 | #include <linux/module.h> | |
7 | #include <linux/string.h> | |
8 | #include <linux/sched.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/reboot.h> | |
12 | #include <linux/delay.h> | |
13 | #include <linux/initrd.h> | |
14 | #include <linux/ide.h> | |
15 | #include <linux/tty.h> | |
16 | #include <linux/bootmem.h> | |
17 | #include <linux/seq_file.h> | |
18 | #include <linux/root_dev.h> | |
19 | #include <linux/cpu.h> | |
20 | #include <linux/console.h> | |
21 | ||
22 | #include <asm/residual.h> | |
23 | #include <asm/io.h> | |
24 | #include <asm/prom.h> | |
25 | #include <asm/processor.h> | |
26 | #include <asm/pgtable.h> | |
9b6b563c PM |
27 | #include <asm/setup.h> |
28 | #include <asm/amigappc.h> | |
29 | #include <asm/smp.h> | |
30 | #include <asm/elf.h> | |
31 | #include <asm/cputable.h> | |
32 | #include <asm/bootx.h> | |
33 | #include <asm/btext.h> | |
34 | #include <asm/machdep.h> | |
35 | #include <asm/uaccess.h> | |
36 | #include <asm/system.h> | |
37 | #include <asm/pmac_feature.h> | |
38 | #include <asm/sections.h> | |
39 | #include <asm/nvram.h> | |
40 | #include <asm/xmon.h> | |
6d7f58b0 | 41 | #include <asm/time.h> |
463ce0e1 | 42 | #include <asm/serial.h> |
51d3082f | 43 | #include <asm/udbg.h> |
9b6b563c | 44 | |
66ba135c SR |
45 | #include "setup.h" |
46 | ||
03501dab PM |
47 | #define DBG(fmt...) |
48 | ||
9b6b563c PM |
49 | #if defined CONFIG_KGDB |
50 | #include <asm/kgdb.h> | |
51 | #endif | |
52 | ||
9b6b563c PM |
53 | extern void bootx_init(unsigned long r4, unsigned long phys); |
54 | ||
9b6b563c PM |
55 | boot_infos_t *boot_infos; |
56 | struct ide_machdep_calls ppc_ide_md; | |
57 | ||
80579e1f PM |
58 | int boot_cpuid; |
59 | EXPORT_SYMBOL_GPL(boot_cpuid); | |
60 | int boot_cpuid_phys; | |
61 | ||
9b6b563c PM |
62 | unsigned long ISA_DMA_THRESHOLD; |
63 | unsigned int DMA_MODE_READ; | |
64 | unsigned int DMA_MODE_WRITE; | |
65 | ||
e574d238 PM |
66 | int have_of = 1; |
67 | ||
9b6b563c | 68 | #ifdef CONFIG_PPC_MULTIPLATFORM |
9b6b563c PM |
69 | dev_t boot_dev; |
70 | #endif /* CONFIG_PPC_MULTIPLATFORM */ | |
71 | ||
72 | #ifdef CONFIG_MAGIC_SYSRQ | |
73 | unsigned long SYSRQ_KEY = 0x54; | |
74 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
75 | ||
76 | #ifdef CONFIG_VGA_CONSOLE | |
77 | unsigned long vgacon_remap_base; | |
78 | #endif | |
79 | ||
9b6b563c PM |
80 | /* |
81 | * These are used in binfmt_elf.c to put aux entries on the stack | |
82 | * for each elf executable being started. | |
83 | */ | |
84 | int dcache_bsize; | |
85 | int icache_bsize; | |
86 | int ucache_bsize; | |
87 | ||
9b6b563c PM |
88 | /* |
89 | * We're called here very early in the boot. We determine the machine | |
90 | * type and call the appropriate low-level setup functions. | |
91 | * -- Cort <cort@fsmlabs.com> | |
92 | * | |
93 | * Note that the kernel may be running at an address which is different | |
94 | * from the address that it was linked at, so we must use RELOC/PTRRELOC | |
95 | * to access static data (including strings). -- paulus | |
96 | */ | |
97 | unsigned long __init early_init(unsigned long dt_ptr) | |
98 | { | |
99 | unsigned long offset = reloc_offset(); | |
100 | ||
dd184343 PM |
101 | /* First zero the BSS -- use memset_io, some platforms don't have |
102 | * caches on yet */ | |
af308377 | 103 | memset_io((void __iomem *)PTRRELOC(&__bss_start), 0, _end - __bss_start); |
dd184343 | 104 | |
9b6b563c PM |
105 | /* |
106 | * Identify the CPU type and fix up code sections | |
107 | * that depend on which cpu we have. | |
108 | */ | |
109 | identify_cpu(offset, 0); | |
110 | do_cpu_ftr_fixups(offset); | |
111 | ||
9b6b563c PM |
112 | return KERNELBASE + offset; |
113 | } | |
114 | ||
9b6b563c | 115 | |
9b6b563c PM |
116 | /* |
117 | * Find out what kind of machine we're on and save any data we need | |
118 | * from the early boot process (devtree is copied on pmac by prom_init()). | |
119 | * This is called very early on the boot process, after a minimal | |
120 | * MMU environment has been set up but before MMU_init is called. | |
121 | */ | |
122 | void __init machine_init(unsigned long dt_ptr, unsigned long phys) | |
123 | { | |
51d3082f BH |
124 | /* If btext is enabled, we might have a BAT setup for early display, |
125 | * thus we do enable some very basic udbg output | |
126 | */ | |
127 | #ifdef CONFIG_BOOTX_TEXT | |
128 | udbg_putc = btext_drawchar; | |
129 | #endif | |
130 | ||
131 | /* Do some early initialization based on the flat device tree */ | |
9b6b563c PM |
132 | early_init_devtree(__va(dt_ptr)); |
133 | ||
51d3082f | 134 | /* Check default command line */ |
9b6b563c | 135 | #ifdef CONFIG_CMDLINE |
51d3082f BH |
136 | if (cmd_line[0] == 0) |
137 | strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line)); | |
9b6b563c PM |
138 | #endif /* CONFIG_CMDLINE */ |
139 | ||
e8222502 | 140 | probe_machine(); |
35499c01 | 141 | |
9b6b563c | 142 | #ifdef CONFIG_6xx |
a0652fc9 PM |
143 | if (cpu_has_feature(CPU_FTR_CAN_DOZE) || |
144 | cpu_has_feature(CPU_FTR_CAN_NAP)) | |
145 | ppc_md.power_save = ppc6xx_idle; | |
9b6b563c | 146 | #endif |
9b6b563c PM |
147 | |
148 | if (ppc_md.progress) | |
149 | ppc_md.progress("id mach(): done", 0x200); | |
150 | } | |
151 | ||
152 | #ifdef CONFIG_BOOKE_WDT | |
153 | /* Checks wdt=x and wdt_period=xx command-line option */ | |
154 | int __init early_parse_wdt(char *p) | |
155 | { | |
156 | if (p && strncmp(p, "0", 1) != 0) | |
157 | booke_wdt_enabled = 1; | |
158 | ||
159 | return 0; | |
160 | } | |
161 | early_param("wdt", early_parse_wdt); | |
162 | ||
163 | int __init early_parse_wdt_period (char *p) | |
164 | { | |
165 | if (p) | |
166 | booke_wdt_period = simple_strtoul(p, NULL, 0); | |
167 | ||
168 | return 0; | |
169 | } | |
170 | early_param("wdt_period", early_parse_wdt_period); | |
171 | #endif /* CONFIG_BOOKE_WDT */ | |
172 | ||
173 | /* Checks "l2cr=xxxx" command-line option */ | |
174 | int __init ppc_setup_l2cr(char *str) | |
175 | { | |
176 | if (cpu_has_feature(CPU_FTR_L2CR)) { | |
177 | unsigned long val = simple_strtoul(str, NULL, 0); | |
178 | printk(KERN_INFO "l2cr set to %lx\n", val); | |
179 | _set_L2CR(0); /* force invalidate by disable cache */ | |
180 | _set_L2CR(val); /* and enable it */ | |
181 | } | |
182 | return 1; | |
183 | } | |
184 | __setup("l2cr=", ppc_setup_l2cr); | |
185 | ||
186 | #ifdef CONFIG_GENERIC_NVRAM | |
187 | ||
188 | /* Generic nvram hooks used by drivers/char/gen_nvram.c */ | |
189 | unsigned char nvram_read_byte(int addr) | |
190 | { | |
191 | if (ppc_md.nvram_read_val) | |
192 | return ppc_md.nvram_read_val(addr); | |
193 | return 0xff; | |
194 | } | |
195 | EXPORT_SYMBOL(nvram_read_byte); | |
196 | ||
197 | void nvram_write_byte(unsigned char val, int addr) | |
198 | { | |
199 | if (ppc_md.nvram_write_val) | |
200 | ppc_md.nvram_write_val(addr, val); | |
201 | } | |
202 | EXPORT_SYMBOL(nvram_write_byte); | |
203 | ||
204 | void nvram_sync(void) | |
205 | { | |
206 | if (ppc_md.nvram_sync) | |
207 | ppc_md.nvram_sync(); | |
208 | } | |
209 | EXPORT_SYMBOL(nvram_sync); | |
210 | ||
211 | #endif /* CONFIG_NVRAM */ | |
212 | ||
213 | static struct cpu cpu_devices[NR_CPUS]; | |
214 | ||
215 | int __init ppc_init(void) | |
216 | { | |
217 | int i; | |
218 | ||
219 | /* clear the progress line */ | |
220 | if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff); | |
221 | ||
222 | /* register CPU devices */ | |
0e551954 | 223 | for_each_possible_cpu(i) |
394e3902 | 224 | register_cpu(&cpu_devices[i], i, NULL); |
9b6b563c PM |
225 | |
226 | /* call platform init */ | |
227 | if (ppc_md.init != NULL) { | |
228 | ppc_md.init(); | |
229 | } | |
230 | return 0; | |
231 | } | |
232 | ||
233 | arch_initcall(ppc_init); | |
234 | ||
235 | /* Warning, IO base is not yet inited */ | |
236 | void __init setup_arch(char **cmdline_p) | |
237 | { | |
9b6b563c PM |
238 | extern void do_init_bootmem(void); |
239 | ||
240 | /* so udelay does something sensible, assume <= 1000 bogomips */ | |
241 | loops_per_jiffy = 500000000 / HZ; | |
242 | ||
9b6b563c | 243 | unflatten_device_tree(); |
a82765b6 | 244 | check_for_initrd(); |
463ce0e1 BH |
245 | |
246 | if (ppc_md.init_early) | |
247 | ppc_md.init_early(); | |
248 | ||
463ce0e1 | 249 | find_legacy_serial_ports(); |
9b6b563c PM |
250 | finish_device_tree(); |
251 | ||
5ad57078 PM |
252 | smp_setup_cpu_maps(); |
253 | ||
fca5dcd4 PM |
254 | #ifdef CONFIG_XMON_DEFAULT |
255 | xmon_init(1); | |
256 | #endif | |
51d3082f BH |
257 | /* Register early console */ |
258 | register_early_udbg_console(); | |
9b6b563c PM |
259 | |
260 | #if defined(CONFIG_KGDB) | |
261 | if (ppc_md.kgdb_map_scc) | |
262 | ppc_md.kgdb_map_scc(); | |
263 | set_debug_traps(); | |
264 | if (strstr(cmd_line, "gdb")) { | |
265 | if (ppc_md.progress) | |
266 | ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000); | |
267 | printk("kgdb breakpoint activated\n"); | |
268 | breakpoint(); | |
269 | } | |
270 | #endif | |
271 | ||
272 | /* | |
273 | * Set cache line size based on type of cpu as a default. | |
274 | * Systems with OF can look in the properties on the cpu node(s) | |
275 | * for a possibly more accurate value. | |
276 | */ | |
277 | if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) { | |
278 | dcache_bsize = cur_cpu_spec->dcache_bsize; | |
279 | icache_bsize = cur_cpu_spec->icache_bsize; | |
280 | ucache_bsize = 0; | |
281 | } else | |
282 | ucache_bsize = dcache_bsize = icache_bsize | |
283 | = cur_cpu_spec->dcache_bsize; | |
284 | ||
285 | /* reboot on panic */ | |
286 | panic_timeout = 180; | |
287 | ||
288 | init_mm.start_code = PAGE_OFFSET; | |
289 | init_mm.end_code = (unsigned long) _etext; | |
290 | init_mm.end_data = (unsigned long) _edata; | |
49b09853 | 291 | init_mm.brk = klimit; |
9b6b563c PM |
292 | |
293 | /* Save unparsed command line copy for /proc/cmdline */ | |
294 | strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); | |
295 | *cmdline_p = cmd_line; | |
296 | ||
297 | parse_early_param(); | |
298 | ||
299 | /* set up the bootmem stuff with available memory */ | |
300 | do_init_bootmem(); | |
301 | if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab); | |
302 | ||
9b6b563c PM |
303 | #ifdef CONFIG_DUMMY_CONSOLE |
304 | conswitchp = &dummy_con; | |
305 | #endif | |
306 | ||
307 | ppc_md.setup_arch(); | |
308 | if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab); | |
309 | ||
310 | paging_init(); | |
9b6b563c | 311 | } |