Commit | Line | Data |
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c121c506 VG |
1 | /* |
2 | * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | */ | |
8 | ||
9 | #include <linux/seq_file.h> | |
10 | #include <linux/fs.h> | |
11 | #include <linux/delay.h> | |
12 | #include <linux/root_dev.h> | |
13 | #include <linux/console.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/cpu.h> | |
d7f8a085 | 16 | #include <linux/clk-provider.h> |
999159a5 | 17 | #include <linux/of_fdt.h> |
d7f8a085 | 18 | #include <linux/of_platform.h> |
1ec9db10 | 19 | #include <linux/cache.h> |
999159a5 | 20 | #include <asm/sections.h> |
c121c506 VG |
21 | #include <asm/arcregs.h> |
22 | #include <asm/tlb.h> | |
c121c506 VG |
23 | #include <asm/setup.h> |
24 | #include <asm/page.h> | |
25 | #include <asm/irq.h> | |
854a0d95 | 26 | #include <asm/unwind.h> |
af617428 | 27 | #include <asm/clk.h> |
03a6d28c | 28 | #include <asm/mach_desc.h> |
619f3018 | 29 | #include <asm/smp.h> |
c121c506 VG |
30 | |
31 | #define FIX_PTR(x) __asm__ __volatile__(";" : "+r"(x)) | |
32 | ||
4255b07f VG |
33 | unsigned int intr_to_DE_cnt; |
34 | ||
59ed9413 VG |
35 | /* Part of U-boot ABI: see head.S */ |
36 | int __initdata uboot_tag; | |
37 | char __initdata *uboot_arg; | |
38 | ||
880beb88 | 39 | const struct machine_desc *machine_desc; |
c121c506 VG |
40 | |
41 | struct task_struct *_current_task[NR_CPUS]; /* For stack switching */ | |
42 | ||
43 | struct cpuinfo_arc cpuinfo_arc700[NR_CPUS]; | |
44 | ||
8e457d6a | 45 | static void read_arc_build_cfg_regs(void) |
c121c506 | 46 | { |
af617428 | 47 | struct bcr_perip uncached_space; |
56372082 | 48 | struct bcr_generic bcr; |
af617428 VG |
49 | struct cpuinfo_arc *cpu = &cpuinfo_arc700[smp_processor_id()]; |
50 | FIX_PTR(cpu); | |
51 | ||
52 | READ_BCR(AUX_IDENTITY, cpu->core); | |
56372082 | 53 | READ_BCR(ARC_REG_ISA_CFG_BCR, cpu->isa); |
af617428 | 54 | |
56372082 | 55 | READ_BCR(ARC_REG_TIMERS_BCR, cpu->timers); |
af617428 | 56 | cpu->vec_base = read_aux_reg(AUX_INTR_VEC_BASE); |
af617428 VG |
57 | |
58 | READ_BCR(ARC_REG_D_UNCACH_BCR, uncached_space); | |
10d11e58 | 59 | BUG_ON((uncached_space.start << 24) != ARC_UNCACHED_ADDR_SPACE); |
af617428 | 60 | |
56372082 | 61 | READ_BCR(ARC_REG_MUL_BCR, cpu->extn_mpy); |
af617428 | 62 | |
56372082 VG |
63 | cpu->extn.norm = read_aux_reg(ARC_REG_NORM_BCR) > 1 ? 1 : 0; /* 2,3 */ |
64 | cpu->extn.barrel = read_aux_reg(ARC_REG_BARREL_BCR) > 1 ? 1 : 0; /* 2,3 */ | |
65 | cpu->extn.swap = read_aux_reg(ARC_REG_SWAP_BCR) ? 1 : 0; /* 1,3 */ | |
66 | cpu->extn.crc = read_aux_reg(ARC_REG_CRC_BCR) ? 1 : 0; | |
67 | cpu->extn.minmax = read_aux_reg(ARC_REG_MIXMAX_BCR) > 1 ? 1 : 0; /* 2 */ | |
af617428 | 68 | |
8b5850f8 VG |
69 | /* Note that we read the CCM BCRs independent of kernel config |
70 | * This is to catch the cases where user doesn't know that | |
71 | * CCMs are present in hardware build | |
72 | */ | |
73 | { | |
74 | struct bcr_iccm iccm; | |
75 | struct bcr_dccm dccm; | |
76 | struct bcr_dccm_base dccm_base; | |
77 | unsigned int bcr_32bit_val; | |
78 | ||
79 | bcr_32bit_val = read_aux_reg(ARC_REG_ICCM_BCR); | |
80 | if (bcr_32bit_val) { | |
81 | iccm = *((struct bcr_iccm *)&bcr_32bit_val); | |
82 | cpu->iccm.base_addr = iccm.base << 16; | |
83 | cpu->iccm.sz = 0x2000 << (iccm.sz - 1); | |
84 | } | |
85 | ||
86 | bcr_32bit_val = read_aux_reg(ARC_REG_DCCM_BCR); | |
87 | if (bcr_32bit_val) { | |
88 | dccm = *((struct bcr_dccm *)&bcr_32bit_val); | |
89 | cpu->dccm.sz = 0x800 << (dccm.sz); | |
90 | ||
91 | READ_BCR(ARC_REG_DCCMBASE_BCR, dccm_base); | |
92 | cpu->dccm.base_addr = dccm_base.addr << 8; | |
93 | } | |
94 | } | |
95 | ||
af617428 VG |
96 | READ_BCR(ARC_REG_XY_MEM_BCR, cpu->extn_xymem); |
97 | ||
c121c506 VG |
98 | read_decode_mmu_bcr(); |
99 | read_decode_cache_bcr(); | |
af617428 | 100 | |
1f6ccfff | 101 | if (is_isa_arcompact()) { |
56372082 VG |
102 | struct bcr_fp_arcompact sp, dp; |
103 | struct bcr_bpu_arcompact bpu; | |
104 | ||
105 | READ_BCR(ARC_REG_FP_BCR, sp); | |
106 | READ_BCR(ARC_REG_DPFP_BCR, dp); | |
107 | cpu->extn.fpu_sp = sp.ver ? 1 : 0; | |
108 | cpu->extn.fpu_dp = dp.ver ? 1 : 0; | |
109 | ||
110 | READ_BCR(ARC_REG_BPU_BCR, bpu); | |
111 | cpu->bpu.ver = bpu.ver; | |
112 | cpu->bpu.full = bpu.fam ? 1 : 0; | |
113 | if (bpu.ent) { | |
114 | cpu->bpu.num_cache = 256 << (bpu.ent - 1); | |
115 | cpu->bpu.num_pred = 256 << (bpu.ent - 1); | |
116 | } | |
1f6ccfff VG |
117 | } else { |
118 | struct bcr_fp_arcv2 spdp; | |
119 | struct bcr_bpu_arcv2 bpu; | |
120 | ||
121 | READ_BCR(ARC_REG_FP_V2_BCR, spdp); | |
122 | cpu->extn.fpu_sp = spdp.sp ? 1 : 0; | |
123 | cpu->extn.fpu_dp = spdp.dp ? 1 : 0; | |
124 | ||
125 | READ_BCR(ARC_REG_BPU_BCR, bpu); | |
126 | cpu->bpu.ver = bpu.ver; | |
127 | cpu->bpu.full = bpu.ft; | |
128 | cpu->bpu.num_cache = 256 << bpu.bce; | |
129 | cpu->bpu.num_pred = 2048 << bpu.pte; | |
56372082 VG |
130 | } |
131 | ||
132 | READ_BCR(ARC_REG_AP_BCR, bcr); | |
133 | cpu->extn.ap = bcr.ver ? 1 : 0; | |
134 | ||
135 | READ_BCR(ARC_REG_SMART_BCR, bcr); | |
136 | cpu->extn.smart = bcr.ver ? 1 : 0; | |
137 | ||
a44ec8bd VG |
138 | READ_BCR(ARC_REG_RTT_BCR, bcr); |
139 | cpu->extn.rtt = bcr.ver ? 1 : 0; | |
140 | ||
141 | cpu->extn.debug = cpu->extn.ap | cpu->extn.smart | cpu->extn.rtt; | |
af617428 VG |
142 | } |
143 | ||
144 | static const struct cpuinfo_data arc_cpu_tbl[] = { | |
af617428 VG |
145 | { {0x20, "ARC 600" }, 0x2F}, |
146 | { {0x30, "ARC 700" }, 0x33}, | |
147 | { {0x34, "ARC 700 R4.10"}, 0x34}, | |
56372082 | 148 | { {0x35, "ARC 700 R4.11"}, 0x35}, |
1f6ccfff | 149 | { {0x50, "ARC HS38" }, 0x51}, |
af617428 VG |
150 | { {0x00, NULL } } |
151 | }; | |
152 | ||
56372082 VG |
153 | #define IS_AVAIL1(v, str) ((v) ? str : "") |
154 | #define IS_USED(cfg) (IS_ENABLED(cfg) ? "" : "(not used) ") | |
155 | #define IS_AVAIL2(v, str, cfg) IS_AVAIL1(v, str), IS_AVAIL1(v, IS_USED(cfg)) | |
156 | ||
8e457d6a | 157 | static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len) |
af617428 | 158 | { |
af617428 VG |
159 | struct cpuinfo_arc *cpu = &cpuinfo_arc700[cpu_id]; |
160 | struct bcr_identity *core = &cpu->core; | |
161 | const struct cpuinfo_data *tbl; | |
56372082 VG |
162 | char *isa_nm; |
163 | int i, be, atomic; | |
164 | int n = 0; | |
165 | ||
af617428 VG |
166 | FIX_PTR(cpu); |
167 | ||
1f6ccfff | 168 | if (is_isa_arcompact()) { |
56372082 VG |
169 | isa_nm = "ARCompact"; |
170 | be = IS_ENABLED(CONFIG_CPU_BIG_ENDIAN); | |
171 | ||
172 | atomic = cpu->isa.atomic1; | |
173 | if (!cpu->isa.ver) /* ISA BCR absent, use Kconfig info */ | |
174 | atomic = IS_ENABLED(CONFIG_ARC_HAS_LLSC); | |
1f6ccfff VG |
175 | } else { |
176 | isa_nm = "ARCv2"; | |
177 | be = cpu->isa.be; | |
178 | atomic = cpu->isa.atomic; | |
56372082 VG |
179 | } |
180 | ||
af617428 | 181 | n += scnprintf(buf + n, len - n, |
56372082 VG |
182 | "\nIDENTITY\t: ARCVER [%#02x] ARCNUM [%#02x] CHIPID [%#4x]\n", |
183 | core->family, core->cpu_id, core->chip_id); | |
af617428 VG |
184 | |
185 | for (tbl = &arc_cpu_tbl[0]; tbl->info.id != 0; tbl++) { | |
186 | if ((core->family >= tbl->info.id) && | |
187 | (core->family <= tbl->up_range)) { | |
188 | n += scnprintf(buf + n, len - n, | |
56372082 VG |
189 | "processor [%d]\t: %s (%s ISA) %s\n", |
190 | cpu_id, tbl->info.str, isa_nm, | |
191 | IS_AVAIL1(be, "[Big-Endian]")); | |
af617428 VG |
192 | break; |
193 | } | |
194 | } | |
195 | ||
196 | if (tbl->info.id == 0) | |
197 | n += scnprintf(buf + n, len - n, "UNKNOWN ARC Processor\n"); | |
198 | ||
199 | n += scnprintf(buf + n, len - n, "CPU speed\t: %u.%02u Mhz\n", | |
200 | (unsigned int)(arc_get_core_freq() / 1000000), | |
201 | (unsigned int)(arc_get_core_freq() / 10000) % 100); | |
202 | ||
aa93e8ef | 203 | n += scnprintf(buf + n, len - n, "Timers\t\t: %s%s%s%s\nISA Extn\t: ", |
56372082 | 204 | IS_AVAIL1(cpu->timers.t0, "Timer0 "), |
aa93e8ef VG |
205 | IS_AVAIL1(cpu->timers.t1, "Timer1 "), |
206 | IS_AVAIL2(cpu->timers.rtc, "64-bit RTC ", | |
207 | CONFIG_ARC_HAS_RTC)); | |
af617428 | 208 | |
1f6ccfff VG |
209 | n += i = scnprintf(buf + n, len - n, "%s%s%s%s%s", |
210 | IS_AVAIL2(atomic, "atomic ", CONFIG_ARC_HAS_LLSC), | |
211 | IS_AVAIL2(cpu->isa.ldd, "ll64 ", CONFIG_ARC_HAS_LL64), | |
212 | IS_AVAIL1(cpu->isa.unalign, "unalign (not used)")); | |
af617428 | 213 | |
56372082 VG |
214 | if (i) |
215 | n += scnprintf(buf + n, len - n, "\n\t\t: "); | |
af617428 | 216 | |
1f6ccfff VG |
217 | if (cpu->extn_mpy.ver) { |
218 | if (cpu->extn_mpy.ver <= 0x2) { /* ARCompact */ | |
219 | n += scnprintf(buf + n, len - n, "mpy "); | |
220 | } else { | |
221 | int opt = 2; /* stock MPY/MPYH */ | |
222 | ||
223 | if (cpu->extn_mpy.dsp) /* OPT 7-9 */ | |
224 | opt = cpu->extn_mpy.dsp + 6; | |
225 | ||
226 | n += scnprintf(buf + n, len - n, "mpy[opt %d] ", opt); | |
227 | } | |
228 | n += scnprintf(buf + n, len - n, "%s", | |
229 | IS_USED(CONFIG_ARC_HAS_HW_MPY)); | |
230 | } | |
231 | ||
56372082 | 232 | n += scnprintf(buf + n, len - n, "%s%s%s%s%s%s%s%s\n", |
1f6ccfff | 233 | IS_AVAIL1(cpu->isa.div_rem, "div_rem "), |
56372082 VG |
234 | IS_AVAIL1(cpu->extn.norm, "norm "), |
235 | IS_AVAIL1(cpu->extn.barrel, "barrel-shift "), | |
236 | IS_AVAIL1(cpu->extn.swap, "swap "), | |
237 | IS_AVAIL1(cpu->extn.minmax, "minmax "), | |
238 | IS_AVAIL1(cpu->extn.crc, "crc "), | |
239 | IS_AVAIL2(1, "swape", CONFIG_ARC_HAS_SWAPE)); | |
af617428 | 240 | |
56372082 VG |
241 | if (cpu->bpu.ver) |
242 | n += scnprintf(buf + n, len - n, | |
243 | "BPU\t\t: %s%s match, cache:%d, Predict Table:%d\n", | |
244 | IS_AVAIL1(cpu->bpu.full, "full"), | |
245 | IS_AVAIL1(!cpu->bpu.full, "partial"), | |
246 | cpu->bpu.num_cache, cpu->bpu.num_pred); | |
af617428 | 247 | |
56372082 VG |
248 | return buf; |
249 | } | |
af617428 | 250 | |
8e457d6a | 251 | static char *arc_extn_mumbojumbo(int cpu_id, char *buf, int len) |
af617428 VG |
252 | { |
253 | int n = 0; | |
254 | struct cpuinfo_arc *cpu = &cpuinfo_arc700[cpu_id]; | |
255 | ||
256 | FIX_PTR(cpu); | |
af617428 VG |
257 | |
258 | n += scnprintf(buf + n, len - n, | |
56372082 | 259 | "Vector Table\t: %#x\nUncached Base\t: %#x\n", |
10d11e58 | 260 | cpu->vec_base, ARC_UNCACHED_ADDR_SPACE); |
56372082 VG |
261 | |
262 | if (cpu->extn.fpu_sp || cpu->extn.fpu_dp) | |
263 | n += scnprintf(buf + n, len - n, "FPU\t\t: %s%s\n", | |
264 | IS_AVAIL1(cpu->extn.fpu_sp, "SP "), | |
265 | IS_AVAIL1(cpu->extn.fpu_dp, "DP ")); | |
266 | ||
267 | if (cpu->extn.debug) | |
268 | n += scnprintf(buf + n, len - n, "DEBUG\t\t: %s%s%s\n", | |
269 | IS_AVAIL1(cpu->extn.ap, "ActionPoint "), | |
270 | IS_AVAIL1(cpu->extn.smart, "smaRT "), | |
271 | IS_AVAIL1(cpu->extn.rtt, "RTT ")); | |
272 | ||
273 | if (cpu->dccm.sz || cpu->iccm.sz) | |
274 | n += scnprintf(buf + n, len - n, "Extn [CCM]\t: DCCM @ %x, %d KB / ICCM: @ %x, %d KB\n", | |
275 | cpu->dccm.base_addr, TO_KB(cpu->dccm.sz), | |
af617428 VG |
276 | cpu->iccm.base_addr, TO_KB(cpu->iccm.sz)); |
277 | ||
af617428 | 278 | n += scnprintf(buf + n, len - n, |
8ff14bbc | 279 | "OS ABI [v3]\t: no-legacy-syscalls\n"); |
af617428 VG |
280 | |
281 | return buf; | |
282 | } | |
283 | ||
c4b9856b | 284 | static void arc_chk_core_config(void) |
8b5850f8 | 285 | { |
8b5850f8 | 286 | struct cpuinfo_arc *cpu = &cpuinfo_arc700[smp_processor_id()]; |
c4b9856b | 287 | int fpu_enabled; |
8b5850f8 | 288 | |
56372082 VG |
289 | if (!cpu->timers.t0) |
290 | panic("Timer0 is not present!\n"); | |
291 | ||
292 | if (!cpu->timers.t1) | |
293 | panic("Timer1 is not present!\n"); | |
294 | ||
aa93e8ef VG |
295 | if (IS_ENABLED(CONFIG_ARC_HAS_RTC) && !cpu->timers.rtc) |
296 | panic("RTC is not present\n"); | |
297 | ||
8b5850f8 VG |
298 | #ifdef CONFIG_ARC_HAS_DCCM |
299 | /* | |
300 | * DCCM can be arbit placed in hardware. | |
301 | * Make sure it's placement/sz matches what Linux is built with | |
302 | */ | |
303 | if ((unsigned int)__arc_dccm_base != cpu->dccm.base_addr) | |
304 | panic("Linux built with incorrect DCCM Base address\n"); | |
305 | ||
306 | if (CONFIG_ARC_DCCM_SZ != cpu->dccm.sz) | |
307 | panic("Linux built with incorrect DCCM Size\n"); | |
308 | #endif | |
309 | ||
310 | #ifdef CONFIG_ARC_HAS_ICCM | |
311 | if (CONFIG_ARC_ICCM_SZ != cpu->iccm.sz) | |
312 | panic("Linux built with incorrect ICCM Size\n"); | |
313 | #endif | |
8b5850f8 | 314 | |
c4b9856b VG |
315 | /* |
316 | * FP hardware/software config sanity | |
317 | * -If hardware contains DPFP, kernel needs to save/restore FPU state | |
318 | * -If not, it will crash trying to save/restore the non-existant regs | |
319 | * | |
320 | * (only DPDP checked since SP has no arch visible regs) | |
321 | */ | |
322 | fpu_enabled = IS_ENABLED(CONFIG_ARC_FPU_SAVE_RESTORE); | |
af617428 | 323 | |
56372082 | 324 | if (cpu->extn.fpu_dp && !fpu_enabled) |
c4b9856b | 325 | pr_warn("CONFIG_ARC_FPU_SAVE_RESTORE needed for working apps\n"); |
56372082 | 326 | else if (!cpu->extn.fpu_dp && fpu_enabled) |
c4b9856b | 327 | panic("FPU non-existent, disable CONFIG_ARC_FPU_SAVE_RESTORE\n"); |
c121c506 VG |
328 | } |
329 | ||
330 | /* | |
331 | * Initialize and setup the processor core | |
332 | * This is called by all the CPUs thus should not do special case stuff | |
333 | * such as only for boot CPU etc | |
334 | */ | |
335 | ||
ce759956 | 336 | void setup_processor(void) |
c121c506 | 337 | { |
af617428 VG |
338 | char str[512]; |
339 | int cpu_id = smp_processor_id(); | |
340 | ||
c121c506 VG |
341 | read_arc_build_cfg_regs(); |
342 | arc_init_IRQ(); | |
af617428 VG |
343 | |
344 | printk(arc_cpu_mumbojumbo(cpu_id, str, sizeof(str))); | |
345 | ||
c121c506 VG |
346 | arc_mmu_init(); |
347 | arc_cache_init(); | |
af617428 VG |
348 | |
349 | printk(arc_extn_mumbojumbo(cpu_id, str, sizeof(str))); | |
af617428 | 350 | printk(arc_platform_smp_cpuinfo()); |
af617428 | 351 | |
c4b9856b | 352 | arc_chk_core_config(); |
c121c506 VG |
353 | } |
354 | ||
59ed9413 VG |
355 | static inline int is_kernel(unsigned long addr) |
356 | { | |
357 | if (addr >= (unsigned long)_stext && addr <= (unsigned long)_end) | |
358 | return 1; | |
359 | return 0; | |
360 | } | |
361 | ||
c121c506 VG |
362 | void __init setup_arch(char **cmdline_p) |
363 | { | |
036b2c56 | 364 | #ifdef CONFIG_ARC_UBOOT_SUPPORT |
e57d339a VG |
365 | /* make sure that uboot passed pointer to cmdline/dtb is valid */ |
366 | if (uboot_tag && is_kernel((unsigned long)uboot_arg)) | |
367 | panic("Invalid uboot arg\n"); | |
368 | ||
369 | /* See if u-boot passed an external Device Tree blob */ | |
370 | machine_desc = setup_machine_fdt(uboot_arg); /* uboot_tag == 2 */ | |
036b2c56 VG |
371 | if (!machine_desc) |
372 | #endif | |
373 | { | |
e57d339a | 374 | /* No, so try the embedded one */ |
59ed9413 VG |
375 | machine_desc = setup_machine_fdt(__dtb_start); |
376 | if (!machine_desc) | |
377 | panic("Embedded DT invalid\n"); | |
378 | ||
379 | /* | |
e57d339a VG |
380 | * If we are here, it is established that @uboot_arg didn't |
381 | * point to DT blob. Instead if u-boot says it is cmdline, | |
382 | * Appent to embedded DT cmdline. | |
59ed9413 VG |
383 | * setup_machine_fdt() would have populated @boot_command_line |
384 | */ | |
385 | if (uboot_tag == 1) { | |
59ed9413 VG |
386 | /* Ensure a whitespace between the 2 cmdlines */ |
387 | strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); | |
388 | strlcat(boot_command_line, uboot_arg, | |
389 | COMMAND_LINE_SIZE); | |
390 | } | |
e57d339a | 391 | } |
c121c506 VG |
392 | |
393 | /* Save unparsed command line copy for /proc/cmdline */ | |
9593a933 | 394 | *cmdline_p = boot_command_line; |
999159a5 | 395 | |
c121c506 VG |
396 | /* To force early parsing of things like mem=xxx */ |
397 | parse_early_param(); | |
398 | ||
399 | /* Platform/board specific: e.g. early console registration */ | |
03a6d28c VG |
400 | if (machine_desc->init_early) |
401 | machine_desc->init_early(); | |
c121c506 VG |
402 | |
403 | setup_processor(); | |
41195d23 | 404 | smp_init_cpus(); |
c121c506 VG |
405 | setup_arch_memory(); |
406 | ||
eab6a08c | 407 | /* copy flat DT out of .init and then unflatten it */ |
1efc959e | 408 | unflatten_and_copy_device_tree(); |
999159a5 | 409 | |
c121c506 VG |
410 | /* Can be issue if someone passes cmd line arg "ro" |
411 | * But that is unlikely so keeping it as it is | |
412 | */ | |
413 | root_mountflags &= ~MS_RDONLY; | |
414 | ||
c121c506 VG |
415 | #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE) |
416 | conswitchp = &dummy_con; | |
417 | #endif | |
418 | ||
854a0d95 VG |
419 | arc_unwind_init(); |
420 | arc_unwind_setup(); | |
c121c506 VG |
421 | } |
422 | ||
03a6d28c VG |
423 | static int __init customize_machine(void) |
424 | { | |
d7f8a085 VG |
425 | of_clk_init(NULL); |
426 | /* | |
427 | * Traverses flattened DeviceTree - registering platform devices | |
428 | * (if any) complete with their resources | |
429 | */ | |
430 | of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); | |
431 | ||
03a6d28c VG |
432 | if (machine_desc->init_machine) |
433 | machine_desc->init_machine(); | |
434 | ||
435 | return 0; | |
436 | } | |
437 | arch_initcall(customize_machine); | |
438 | ||
439 | static int __init init_late_machine(void) | |
440 | { | |
441 | if (machine_desc->init_late) | |
442 | machine_desc->init_late(); | |
443 | ||
444 | return 0; | |
445 | } | |
446 | late_initcall(init_late_machine); | |
c121c506 VG |
447 | /* |
448 | * Get CPU information for use by the procfs. | |
449 | */ | |
450 | ||
451 | #define cpu_to_ptr(c) ((void *)(0xFFFF0000 | (unsigned int)(c))) | |
452 | #define ptr_to_cpu(p) (~0xFFFF0000UL & (unsigned int)(p)) | |
453 | ||
454 | static int show_cpuinfo(struct seq_file *m, void *v) | |
455 | { | |
456 | char *str; | |
457 | int cpu_id = ptr_to_cpu(v); | |
458 | ||
4c86231c VG |
459 | if (!cpu_online(cpu_id)) { |
460 | seq_printf(m, "processor [%d]\t: Offline\n", cpu_id); | |
461 | goto done; | |
462 | } | |
463 | ||
c121c506 VG |
464 | str = (char *)__get_free_page(GFP_TEMPORARY); |
465 | if (!str) | |
466 | goto done; | |
467 | ||
af617428 | 468 | seq_printf(m, arc_cpu_mumbojumbo(cpu_id, str, PAGE_SIZE)); |
c121c506 | 469 | |
56372082 | 470 | seq_printf(m, "Bogo MIPS\t: %lu.%02lu\n", |
c121c506 VG |
471 | loops_per_jiffy / (500000 / HZ), |
472 | (loops_per_jiffy / (5000 / HZ)) % 100); | |
473 | ||
af617428 | 474 | seq_printf(m, arc_mmu_mumbojumbo(cpu_id, str, PAGE_SIZE)); |
af617428 | 475 | seq_printf(m, arc_cache_mumbojumbo(cpu_id, str, PAGE_SIZE)); |
af617428 | 476 | seq_printf(m, arc_extn_mumbojumbo(cpu_id, str, PAGE_SIZE)); |
af617428 | 477 | seq_printf(m, arc_platform_smp_cpuinfo()); |
af617428 | 478 | |
c121c506 VG |
479 | free_page((unsigned long)str); |
480 | done: | |
4c86231c | 481 | seq_printf(m, "\n"); |
c121c506 VG |
482 | |
483 | return 0; | |
484 | } | |
485 | ||
486 | static void *c_start(struct seq_file *m, loff_t *pos) | |
487 | { | |
488 | /* | |
489 | * Callback returns cpu-id to iterator for show routine, NULL to stop. | |
490 | * However since NULL is also a valid cpu-id (0), we use a round-about | |
491 | * way to pass it w/o having to kmalloc/free a 2 byte string. | |
492 | * Encode cpu-id as 0xFFcccc, which is decoded by show routine. | |
493 | */ | |
494 | return *pos < num_possible_cpus() ? cpu_to_ptr(*pos) : NULL; | |
495 | } | |
496 | ||
497 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
498 | { | |
499 | ++*pos; | |
500 | return c_start(m, pos); | |
501 | } | |
502 | ||
503 | static void c_stop(struct seq_file *m, void *v) | |
504 | { | |
505 | } | |
506 | ||
507 | const struct seq_operations cpuinfo_op = { | |
508 | .start = c_start, | |
509 | .next = c_next, | |
510 | .stop = c_stop, | |
511 | .show = show_cpuinfo | |
512 | }; | |
513 | ||
514 | static DEFINE_PER_CPU(struct cpu, cpu_topology); | |
515 | ||
516 | static int __init topology_init(void) | |
517 | { | |
518 | int cpu; | |
519 | ||
520 | for_each_present_cpu(cpu) | |
521 | register_cpu(&per_cpu(cpu_topology, cpu), cpu); | |
522 | ||
523 | return 0; | |
524 | } | |
525 | ||
526 | subsys_initcall(topology_init); |