Commit | Line | Data |
---|---|---|
9b6b563c PM |
1 | /* |
2 | * Common prep/pmac/chrp boot and setup code. | |
3 | */ | |
4 | ||
9b6b563c PM |
5 | #include <linux/module.h> |
6 | #include <linux/string.h> | |
7 | #include <linux/sched.h> | |
8 | #include <linux/init.h> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/reboot.h> | |
11 | #include <linux/delay.h> | |
12 | #include <linux/initrd.h> | |
576e393e | 13 | #if defined(CONFIG_IDE) || defined(CONFIG_IDE_MODULE) |
9b6b563c | 14 | #include <linux/ide.h> |
576e393e | 15 | #endif |
9b6b563c PM |
16 | #include <linux/tty.h> |
17 | #include <linux/bootmem.h> | |
18 | #include <linux/seq_file.h> | |
19 | #include <linux/root_dev.h> | |
20 | #include <linux/cpu.h> | |
21 | #include <linux/console.h> | |
22 | ||
9b6b563c PM |
23 | #include <asm/io.h> |
24 | #include <asm/prom.h> | |
25 | #include <asm/processor.h> | |
26 | #include <asm/pgtable.h> | |
9b6b563c | 27 | #include <asm/setup.h> |
9b6b563c PM |
28 | #include <asm/smp.h> |
29 | #include <asm/elf.h> | |
30 | #include <asm/cputable.h> | |
31 | #include <asm/bootx.h> | |
32 | #include <asm/btext.h> | |
33 | #include <asm/machdep.h> | |
34 | #include <asm/uaccess.h> | |
35 | #include <asm/system.h> | |
36 | #include <asm/pmac_feature.h> | |
37 | #include <asm/sections.h> | |
38 | #include <asm/nvram.h> | |
39 | #include <asm/xmon.h> | |
6d7f58b0 | 40 | #include <asm/time.h> |
463ce0e1 | 41 | #include <asm/serial.h> |
51d3082f | 42 | #include <asm/udbg.h> |
9b6b563c | 43 | |
66ba135c SR |
44 | #include "setup.h" |
45 | ||
03501dab PM |
46 | #define DBG(fmt...) |
47 | ||
9b6b563c PM |
48 | #if defined CONFIG_KGDB |
49 | #include <asm/kgdb.h> | |
50 | #endif | |
51 | ||
9b6b563c PM |
52 | extern void bootx_init(unsigned long r4, unsigned long phys); |
53 | ||
576e393e | 54 | #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) |
9b6b563c | 55 | struct ide_machdep_calls ppc_ide_md; |
576e393e EM |
56 | EXPORT_SYMBOL(ppc_ide_md); |
57 | #endif | |
9b6b563c | 58 | |
80579e1f PM |
59 | int boot_cpuid; |
60 | EXPORT_SYMBOL_GPL(boot_cpuid); | |
61 | int boot_cpuid_phys; | |
62 | ||
9b6b563c PM |
63 | unsigned long ISA_DMA_THRESHOLD; |
64 | unsigned int DMA_MODE_READ; | |
65 | unsigned int DMA_MODE_WRITE; | |
66 | ||
e574d238 PM |
67 | int have_of = 1; |
68 | ||
9b6b563c PM |
69 | #ifdef CONFIG_VGA_CONSOLE |
70 | unsigned long vgacon_remap_base; | |
d003e7a1 | 71 | EXPORT_SYMBOL(vgacon_remap_base); |
9b6b563c PM |
72 | #endif |
73 | ||
9b6b563c PM |
74 | /* |
75 | * These are used in binfmt_elf.c to put aux entries on the stack | |
76 | * for each elf executable being started. | |
77 | */ | |
78 | int dcache_bsize; | |
79 | int icache_bsize; | |
80 | int ucache_bsize; | |
81 | ||
9b6b563c PM |
82 | /* |
83 | * We're called here very early in the boot. We determine the machine | |
84 | * type and call the appropriate low-level setup functions. | |
85 | * -- Cort <cort@fsmlabs.com> | |
86 | * | |
87 | * Note that the kernel may be running at an address which is different | |
88 | * from the address that it was linked at, so we must use RELOC/PTRRELOC | |
89 | * to access static data (including strings). -- paulus | |
90 | */ | |
91 | unsigned long __init early_init(unsigned long dt_ptr) | |
92 | { | |
93 | unsigned long offset = reloc_offset(); | |
42c4aaad | 94 | struct cpu_spec *spec; |
9b6b563c | 95 | |
dd184343 PM |
96 | /* First zero the BSS -- use memset_io, some platforms don't have |
97 | * caches on yet */ | |
556b09c8 MG |
98 | memset_io((void __iomem *)PTRRELOC(&__bss_start), 0, |
99 | __bss_stop - __bss_start); | |
dd184343 | 100 | |
9b6b563c PM |
101 | /* |
102 | * Identify the CPU type and fix up code sections | |
103 | * that depend on which cpu we have. | |
104 | */ | |
974a76f5 | 105 | spec = identify_cpu(offset, mfspr(SPRN_PVR)); |
42c4aaad | 106 | |
0909c8c2 | 107 | do_feature_fixups(spec->cpu_features, |
42c4aaad BH |
108 | PTRRELOC(&__start___ftr_fixup), |
109 | PTRRELOC(&__stop___ftr_fixup)); | |
9b6b563c | 110 | |
9b6b563c PM |
111 | return KERNELBASE + offset; |
112 | } | |
113 | ||
9b6b563c | 114 | |
9b6b563c PM |
115 | /* |
116 | * Find out what kind of machine we're on and save any data we need | |
117 | * from the early boot process (devtree is copied on pmac by prom_init()). | |
118 | * This is called very early on the boot process, after a minimal | |
119 | * MMU environment has been set up but before MMU_init is called. | |
120 | */ | |
121 | void __init machine_init(unsigned long dt_ptr, unsigned long phys) | |
122 | { | |
719c91cc DG |
123 | /* Enable early debugging if any specified (see udbg.h) */ |
124 | udbg_early_init(); | |
51d3082f BH |
125 | |
126 | /* Do some early initialization based on the flat device tree */ | |
9b6b563c PM |
127 | early_init_devtree(__va(dt_ptr)); |
128 | ||
e8222502 | 129 | probe_machine(); |
35499c01 | 130 | |
9b6b563c | 131 | #ifdef CONFIG_6xx |
a0652fc9 PM |
132 | if (cpu_has_feature(CPU_FTR_CAN_DOZE) || |
133 | cpu_has_feature(CPU_FTR_CAN_NAP)) | |
134 | ppc_md.power_save = ppc6xx_idle; | |
9b6b563c | 135 | #endif |
9b6b563c PM |
136 | |
137 | if (ppc_md.progress) | |
138 | ppc_md.progress("id mach(): done", 0x200); | |
139 | } | |
140 | ||
141 | #ifdef CONFIG_BOOKE_WDT | |
142 | /* Checks wdt=x and wdt_period=xx command-line option */ | |
143 | int __init early_parse_wdt(char *p) | |
144 | { | |
145 | if (p && strncmp(p, "0", 1) != 0) | |
146 | booke_wdt_enabled = 1; | |
147 | ||
148 | return 0; | |
149 | } | |
150 | early_param("wdt", early_parse_wdt); | |
151 | ||
152 | int __init early_parse_wdt_period (char *p) | |
153 | { | |
154 | if (p) | |
155 | booke_wdt_period = simple_strtoul(p, NULL, 0); | |
156 | ||
157 | return 0; | |
158 | } | |
159 | early_param("wdt_period", early_parse_wdt_period); | |
160 | #endif /* CONFIG_BOOKE_WDT */ | |
161 | ||
162 | /* Checks "l2cr=xxxx" command-line option */ | |
163 | int __init ppc_setup_l2cr(char *str) | |
164 | { | |
165 | if (cpu_has_feature(CPU_FTR_L2CR)) { | |
166 | unsigned long val = simple_strtoul(str, NULL, 0); | |
167 | printk(KERN_INFO "l2cr set to %lx\n", val); | |
168 | _set_L2CR(0); /* force invalidate by disable cache */ | |
169 | _set_L2CR(val); /* and enable it */ | |
170 | } | |
171 | return 1; | |
172 | } | |
173 | __setup("l2cr=", ppc_setup_l2cr); | |
174 | ||
175 | #ifdef CONFIG_GENERIC_NVRAM | |
176 | ||
177 | /* Generic nvram hooks used by drivers/char/gen_nvram.c */ | |
178 | unsigned char nvram_read_byte(int addr) | |
179 | { | |
180 | if (ppc_md.nvram_read_val) | |
181 | return ppc_md.nvram_read_val(addr); | |
182 | return 0xff; | |
183 | } | |
184 | EXPORT_SYMBOL(nvram_read_byte); | |
185 | ||
186 | void nvram_write_byte(unsigned char val, int addr) | |
187 | { | |
188 | if (ppc_md.nvram_write_val) | |
189 | ppc_md.nvram_write_val(addr, val); | |
190 | } | |
191 | EXPORT_SYMBOL(nvram_write_byte); | |
192 | ||
193 | void nvram_sync(void) | |
194 | { | |
195 | if (ppc_md.nvram_sync) | |
196 | ppc_md.nvram_sync(); | |
197 | } | |
198 | EXPORT_SYMBOL(nvram_sync); | |
199 | ||
200 | #endif /* CONFIG_NVRAM */ | |
201 | ||
5e41763a | 202 | static DEFINE_PER_CPU(struct cpu, cpu_devices); |
9b6b563c PM |
203 | |
204 | int __init ppc_init(void) | |
205 | { | |
5e41763a | 206 | int cpu; |
9b6b563c PM |
207 | |
208 | /* clear the progress line */ | |
5e41763a GP |
209 | if (ppc_md.progress) |
210 | ppc_md.progress(" ", 0xffff); | |
9b6b563c PM |
211 | |
212 | /* register CPU devices */ | |
5e41763a GP |
213 | for_each_possible_cpu(cpu) { |
214 | struct cpu *c = &per_cpu(cpu_devices, cpu); | |
215 | c->hotpluggable = 1; | |
216 | register_cpu(c, cpu); | |
217 | } | |
9b6b563c PM |
218 | |
219 | /* call platform init */ | |
220 | if (ppc_md.init != NULL) { | |
221 | ppc_md.init(); | |
222 | } | |
223 | return 0; | |
224 | } | |
225 | ||
226 | arch_initcall(ppc_init); | |
227 | ||
228 | /* Warning, IO base is not yet inited */ | |
229 | void __init setup_arch(char **cmdline_p) | |
230 | { | |
846f77b0 ME |
231 | *cmdline_p = cmd_line; |
232 | ||
9b6b563c PM |
233 | /* so udelay does something sensible, assume <= 1000 bogomips */ |
234 | loops_per_jiffy = 500000000 / HZ; | |
235 | ||
9b6b563c | 236 | unflatten_device_tree(); |
a82765b6 | 237 | check_for_initrd(); |
463ce0e1 BH |
238 | |
239 | if (ppc_md.init_early) | |
240 | ppc_md.init_early(); | |
241 | ||
463ce0e1 | 242 | find_legacy_serial_ports(); |
9b6b563c | 243 | |
5ad57078 PM |
244 | smp_setup_cpu_maps(); |
245 | ||
51d3082f BH |
246 | /* Register early console */ |
247 | register_early_udbg_console(); | |
9b6b563c | 248 | |
47679283 ME |
249 | xmon_setup(); |
250 | ||
9b6b563c PM |
251 | #if defined(CONFIG_KGDB) |
252 | if (ppc_md.kgdb_map_scc) | |
253 | ppc_md.kgdb_map_scc(); | |
254 | set_debug_traps(); | |
255 | if (strstr(cmd_line, "gdb")) { | |
256 | if (ppc_md.progress) | |
257 | ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000); | |
258 | printk("kgdb breakpoint activated\n"); | |
259 | breakpoint(); | |
260 | } | |
261 | #endif | |
262 | ||
263 | /* | |
264 | * Set cache line size based on type of cpu as a default. | |
265 | * Systems with OF can look in the properties on the cpu node(s) | |
266 | * for a possibly more accurate value. | |
267 | */ | |
4508dc21 DG |
268 | dcache_bsize = cur_cpu_spec->dcache_bsize; |
269 | icache_bsize = cur_cpu_spec->icache_bsize; | |
270 | ucache_bsize = 0; | |
271 | if (cpu_has_feature(CPU_FTR_UNIFIED_ID_CACHE)) | |
272 | ucache_bsize = icache_bsize = dcache_bsize; | |
9b6b563c PM |
273 | |
274 | /* reboot on panic */ | |
275 | panic_timeout = 180; | |
276 | ||
7e990266 KG |
277 | if (ppc_md.panic) |
278 | setup_panic(); | |
279 | ||
9b6b563c PM |
280 | init_mm.start_code = PAGE_OFFSET; |
281 | init_mm.end_code = (unsigned long) _etext; | |
282 | init_mm.end_data = (unsigned long) _edata; | |
49b09853 | 283 | init_mm.brk = klimit; |
9b6b563c | 284 | |
9b6b563c PM |
285 | /* set up the bootmem stuff with available memory */ |
286 | do_init_bootmem(); | |
287 | if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab); | |
288 | ||
9b6b563c PM |
289 | #ifdef CONFIG_DUMMY_CONSOLE |
290 | conswitchp = &dummy_con; | |
291 | #endif | |
292 | ||
38db7e74 GL |
293 | if (ppc_md.setup_arch) |
294 | ppc_md.setup_arch(); | |
9b6b563c PM |
295 | if ( ppc_md.progress ) ppc_md.progress("arch: exit", 0x3eab); |
296 | ||
297 | paging_init(); | |
9b6b563c | 298 | } |