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 | ||
53 | extern void platform_init(void); | |
54 | extern void bootx_init(unsigned long r4, unsigned long phys); | |
55 | ||
56 | extern void ppc6xx_idle(void); | |
57 | extern void power4_idle(void); | |
58 | ||
59 | boot_infos_t *boot_infos; | |
60 | struct ide_machdep_calls ppc_ide_md; | |
61 | ||
80579e1f PM |
62 | int boot_cpuid; |
63 | EXPORT_SYMBOL_GPL(boot_cpuid); | |
64 | int boot_cpuid_phys; | |
65 | ||
9b6b563c PM |
66 | unsigned long ISA_DMA_THRESHOLD; |
67 | unsigned int DMA_MODE_READ; | |
68 | unsigned int DMA_MODE_WRITE; | |
69 | ||
e574d238 PM |
70 | int have_of = 1; |
71 | ||
9b6b563c | 72 | #ifdef CONFIG_PPC_MULTIPLATFORM |
9b6b563c PM |
73 | extern void prep_init(void); |
74 | extern void pmac_init(void); | |
75 | extern void chrp_init(void); | |
76 | ||
77 | dev_t boot_dev; | |
78 | #endif /* CONFIG_PPC_MULTIPLATFORM */ | |
79 | ||
80 | #ifdef CONFIG_MAGIC_SYSRQ | |
81 | unsigned long SYSRQ_KEY = 0x54; | |
82 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
83 | ||
84 | #ifdef CONFIG_VGA_CONSOLE | |
85 | unsigned long vgacon_remap_base; | |
86 | #endif | |
87 | ||
88 | struct machdep_calls ppc_md; | |
e574d238 | 89 | EXPORT_SYMBOL(ppc_md); |
9b6b563c PM |
90 | |
91 | /* | |
92 | * These are used in binfmt_elf.c to put aux entries on the stack | |
93 | * for each elf executable being started. | |
94 | */ | |
95 | int dcache_bsize; | |
96 | int icache_bsize; | |
97 | int ucache_bsize; | |
98 | ||
9b6b563c PM |
99 | /* |
100 | * We're called here very early in the boot. We determine the machine | |
101 | * type and call the appropriate low-level setup functions. | |
102 | * -- Cort <cort@fsmlabs.com> | |
103 | * | |
104 | * Note that the kernel may be running at an address which is different | |
105 | * from the address that it was linked at, so we must use RELOC/PTRRELOC | |
106 | * to access static data (including strings). -- paulus | |
107 | */ | |
108 | unsigned long __init early_init(unsigned long dt_ptr) | |
109 | { | |
110 | unsigned long offset = reloc_offset(); | |
111 | ||
dd184343 PM |
112 | /* First zero the BSS -- use memset_io, some platforms don't have |
113 | * caches on yet */ | |
af308377 | 114 | memset_io((void __iomem *)PTRRELOC(&__bss_start), 0, _end - __bss_start); |
dd184343 | 115 | |
9b6b563c PM |
116 | /* |
117 | * Identify the CPU type and fix up code sections | |
118 | * that depend on which cpu we have. | |
119 | */ | |
120 | identify_cpu(offset, 0); | |
121 | do_cpu_ftr_fixups(offset); | |
122 | ||
9b6b563c PM |
123 | return KERNELBASE + offset; |
124 | } | |
125 | ||
9b6b563c PM |
126 | #ifdef CONFIG_PPC_MULTIPLATFORM |
127 | /* | |
128 | * The PPC_MULTIPLATFORM version of platform_init... | |
129 | */ | |
130 | void __init platform_init(void) | |
131 | { | |
132 | /* if we didn't get any bootinfo telling us what we are... */ | |
133 | if (_machine == 0) { | |
134 | /* prep boot loader tells us if we're prep or not */ | |
135 | if ( *(unsigned long *)(KERNELBASE) == (0xdeadc0de) ) | |
136 | _machine = _MACH_prep; | |
137 | } | |
138 | ||
139 | #ifdef CONFIG_PPC_PREP | |
140 | /* not much more to do here, if prep */ | |
141 | if (_machine == _MACH_prep) { | |
142 | prep_init(); | |
143 | return; | |
144 | } | |
145 | #endif | |
146 | ||
147 | #ifdef CONFIG_ADB | |
148 | if (strstr(cmd_line, "adb_sync")) { | |
149 | extern int __adb_probe_sync; | |
150 | __adb_probe_sync = 1; | |
151 | } | |
152 | #endif /* CONFIG_ADB */ | |
153 | ||
154 | switch (_machine) { | |
155 | #ifdef CONFIG_PPC_PMAC | |
156 | case _MACH_Pmac: | |
157 | pmac_init(); | |
158 | break; | |
159 | #endif | |
160 | #ifdef CONFIG_PPC_CHRP | |
161 | case _MACH_chrp: | |
162 | chrp_init(); | |
163 | break; | |
164 | #endif | |
165 | } | |
166 | } | |
03501dab | 167 | #endif |
9b6b563c | 168 | |
9b6b563c PM |
169 | /* |
170 | * Find out what kind of machine we're on and save any data we need | |
171 | * from the early boot process (devtree is copied on pmac by prom_init()). | |
172 | * This is called very early on the boot process, after a minimal | |
173 | * MMU environment has been set up but before MMU_init is called. | |
174 | */ | |
175 | void __init machine_init(unsigned long dt_ptr, unsigned long phys) | |
176 | { | |
51d3082f BH |
177 | /* If btext is enabled, we might have a BAT setup for early display, |
178 | * thus we do enable some very basic udbg output | |
179 | */ | |
180 | #ifdef CONFIG_BOOTX_TEXT | |
181 | udbg_putc = btext_drawchar; | |
182 | #endif | |
183 | ||
184 | /* Do some early initialization based on the flat device tree */ | |
9b6b563c PM |
185 | early_init_devtree(__va(dt_ptr)); |
186 | ||
51d3082f | 187 | /* Check default command line */ |
9b6b563c | 188 | #ifdef CONFIG_CMDLINE |
51d3082f BH |
189 | if (cmd_line[0] == 0) |
190 | strlcpy(cmd_line, CONFIG_CMDLINE, sizeof(cmd_line)); | |
9b6b563c PM |
191 | #endif /* CONFIG_CMDLINE */ |
192 | ||
51d3082f | 193 | /* Base init based on machine type */ |
35499c01 PM |
194 | platform_init(); |
195 | ||
9b6b563c PM |
196 | #ifdef CONFIG_6xx |
197 | ppc_md.power_save = ppc6xx_idle; | |
198 | #endif | |
9b6b563c PM |
199 | |
200 | if (ppc_md.progress) | |
201 | ppc_md.progress("id mach(): done", 0x200); | |
202 | } | |
203 | ||
204 | #ifdef CONFIG_BOOKE_WDT | |
205 | /* Checks wdt=x and wdt_period=xx command-line option */ | |
206 | int __init early_parse_wdt(char *p) | |
207 | { | |
208 | if (p && strncmp(p, "0", 1) != 0) | |
209 | booke_wdt_enabled = 1; | |
210 | ||
211 | return 0; | |
212 | } | |
213 | early_param("wdt", early_parse_wdt); | |
214 | ||
215 | int __init early_parse_wdt_period (char *p) | |
216 | { | |
217 | if (p) | |
218 | booke_wdt_period = simple_strtoul(p, NULL, 0); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | early_param("wdt_period", early_parse_wdt_period); | |
223 | #endif /* CONFIG_BOOKE_WDT */ | |
224 | ||
225 | /* Checks "l2cr=xxxx" command-line option */ | |
226 | int __init ppc_setup_l2cr(char *str) | |
227 | { | |
228 | if (cpu_has_feature(CPU_FTR_L2CR)) { | |
229 | unsigned long val = simple_strtoul(str, NULL, 0); | |
230 | printk(KERN_INFO "l2cr set to %lx\n", val); | |
231 | _set_L2CR(0); /* force invalidate by disable cache */ | |
232 | _set_L2CR(val); /* and enable it */ | |
233 | } | |
234 | return 1; | |
235 | } | |
236 | __setup("l2cr=", ppc_setup_l2cr); | |
237 | ||
238 | #ifdef CONFIG_GENERIC_NVRAM | |
239 | ||
240 | /* Generic nvram hooks used by drivers/char/gen_nvram.c */ | |
241 | unsigned char nvram_read_byte(int addr) | |
242 | { | |
243 | if (ppc_md.nvram_read_val) | |
244 | return ppc_md.nvram_read_val(addr); | |
245 | return 0xff; | |
246 | } | |
247 | EXPORT_SYMBOL(nvram_read_byte); | |
248 | ||
249 | void nvram_write_byte(unsigned char val, int addr) | |
250 | { | |
251 | if (ppc_md.nvram_write_val) | |
252 | ppc_md.nvram_write_val(addr, val); | |
253 | } | |
254 | EXPORT_SYMBOL(nvram_write_byte); | |
255 | ||
256 | void nvram_sync(void) | |
257 | { | |
258 | if (ppc_md.nvram_sync) | |
259 | ppc_md.nvram_sync(); | |
260 | } | |
261 | EXPORT_SYMBOL(nvram_sync); | |
262 | ||
263 | #endif /* CONFIG_NVRAM */ | |
264 | ||
265 | static struct cpu cpu_devices[NR_CPUS]; | |
266 | ||
267 | int __init ppc_init(void) | |
268 | { | |
269 | int i; | |
270 | ||
271 | /* clear the progress line */ | |
272 | if ( ppc_md.progress ) ppc_md.progress(" ", 0xffff); | |
273 | ||
274 | /* register CPU devices */ | |
394e3902 AM |
275 | for_each_cpu(i) |
276 | register_cpu(&cpu_devices[i], i, NULL); | |
9b6b563c PM |
277 | |
278 | /* call platform init */ | |
279 | if (ppc_md.init != NULL) { | |
280 | ppc_md.init(); | |
281 | } | |
282 | return 0; | |
283 | } | |
284 | ||
285 | arch_initcall(ppc_init); | |
286 | ||
287 | /* Warning, IO base is not yet inited */ | |
288 | void __init setup_arch(char **cmdline_p) | |
289 | { | |
9b6b563c PM |
290 | extern void do_init_bootmem(void); |
291 | ||
292 | /* so udelay does something sensible, assume <= 1000 bogomips */ | |
293 | loops_per_jiffy = 500000000 / HZ; | |
294 | ||
9b6b563c | 295 | unflatten_device_tree(); |
a82765b6 | 296 | check_for_initrd(); |
463ce0e1 BH |
297 | |
298 | if (ppc_md.init_early) | |
299 | ppc_md.init_early(); | |
300 | ||
463ce0e1 | 301 | find_legacy_serial_ports(); |
9b6b563c PM |
302 | finish_device_tree(); |
303 | ||
5ad57078 PM |
304 | smp_setup_cpu_maps(); |
305 | ||
fca5dcd4 PM |
306 | #ifdef CONFIG_XMON_DEFAULT |
307 | xmon_init(1); | |
308 | #endif | |
51d3082f BH |
309 | /* Register early console */ |
310 | register_early_udbg_console(); | |
9b6b563c PM |
311 | |
312 | #if defined(CONFIG_KGDB) | |
313 | if (ppc_md.kgdb_map_scc) | |
314 | ppc_md.kgdb_map_scc(); | |
315 | set_debug_traps(); | |
316 | if (strstr(cmd_line, "gdb")) { | |
317 | if (ppc_md.progress) | |
318 | ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000); | |
319 | printk("kgdb breakpoint activated\n"); | |
320 | breakpoint(); | |
321 | } | |
322 | #endif | |
323 | ||
324 | /* | |
325 | * Set cache line size based on type of cpu as a default. | |
326 | * Systems with OF can look in the properties on the cpu node(s) | |
327 | * for a possibly more accurate value. | |
328 | */ | |
329 | if (cpu_has_feature(CPU_FTR_SPLIT_ID_CACHE)) { | |
330 | dcache_bsize = cur_cpu_spec->dcache_bsize; | |
331 | icache_bsize = cur_cpu_spec->icache_bsize; | |
332 | ucache_bsize = 0; | |
333 | } else | |
334 | ucache_bsize = dcache_bsize = icache_bsize | |
335 | = cur_cpu_spec->dcache_bsize; | |
336 | ||
337 | /* reboot on panic */ | |
338 | panic_timeout = 180; | |
339 | ||
340 | init_mm.start_code = PAGE_OFFSET; | |
341 | init_mm.end_code = (unsigned long) _etext; | |
342 | init_mm.end_data = (unsigned long) _edata; | |
49b09853 | 343 | init_mm.brk = klimit; |
9b6b563c PM |
344 | |
345 | /* Save unparsed command line copy for /proc/cmdline */ | |
346 | strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE); | |
347 | *cmdline_p = cmd_line; | |
348 | ||
349 | parse_early_param(); | |
350 | ||
351 | /* set up the bootmem stuff with available memory */ | |
352 | do_init_bootmem(); | |
353 | if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab); | |
354 | ||
355 | #ifdef CONFIG_PPC_OCP | |
356 | /* Initialize OCP device list */ | |
357 | ocp_early_init(); | |
358 | if ( ppc_md.progress ) ppc_md.progress("ocp: exit", 0x3eab); | |
359 | #endif | |
360 | ||
361 | #ifdef CONFIG_DUMMY_CONSOLE | |
362 | conswitchp = &dummy_con; | |
363 | #endif | |
364 | ||
365 | ppc_md.setup_arch(); | |
366 | if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab); | |
367 | ||
368 | paging_init(); | |
369 | ||
370 | /* this is for modules since _machine can be a define -- Cort */ | |
371 | ppc_md.ppc_machine = _machine; | |
372 | } |