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; |
b89bd1f4 | 48 | struct bcr_timer timer; |
56372082 | 49 | struct bcr_generic bcr; |
af617428 | 50 | struct cpuinfo_arc *cpu = &cpuinfo_arc700[smp_processor_id()]; |
e13c42ec | 51 | unsigned long perip_space; |
af617428 VG |
52 | FIX_PTR(cpu); |
53 | ||
54 | READ_BCR(AUX_IDENTITY, cpu->core); | |
56372082 | 55 | READ_BCR(ARC_REG_ISA_CFG_BCR, cpu->isa); |
af617428 | 56 | |
b89bd1f4 VG |
57 | READ_BCR(ARC_REG_TIMERS_BCR, timer); |
58 | cpu->extn.timer0 = timer.t0; | |
59 | cpu->extn.timer1 = timer.t1; | |
60 | cpu->extn.rtc = timer.rtc; | |
61 | ||
af617428 | 62 | cpu->vec_base = read_aux_reg(AUX_INTR_VEC_BASE); |
af617428 VG |
63 | |
64 | READ_BCR(ARC_REG_D_UNCACH_BCR, uncached_space); | |
e13c42ec VG |
65 | if (uncached_space.ver < 3) |
66 | perip_space = uncached_space.start << 24; | |
67 | else | |
68 | perip_space = read_aux_reg(AUX_NON_VOL) & 0xF0000000; | |
69 | ||
70 | BUG_ON(perip_space != ARC_UNCACHED_ADDR_SPACE); | |
af617428 | 71 | |
56372082 | 72 | READ_BCR(ARC_REG_MUL_BCR, cpu->extn_mpy); |
af617428 | 73 | |
56372082 VG |
74 | cpu->extn.norm = read_aux_reg(ARC_REG_NORM_BCR) > 1 ? 1 : 0; /* 2,3 */ |
75 | cpu->extn.barrel = read_aux_reg(ARC_REG_BARREL_BCR) > 1 ? 1 : 0; /* 2,3 */ | |
76 | cpu->extn.swap = read_aux_reg(ARC_REG_SWAP_BCR) ? 1 : 0; /* 1,3 */ | |
77 | cpu->extn.crc = read_aux_reg(ARC_REG_CRC_BCR) ? 1 : 0; | |
78 | cpu->extn.minmax = read_aux_reg(ARC_REG_MIXMAX_BCR) > 1 ? 1 : 0; /* 2 */ | |
af617428 | 79 | |
8b5850f8 VG |
80 | /* Note that we read the CCM BCRs independent of kernel config |
81 | * This is to catch the cases where user doesn't know that | |
82 | * CCMs are present in hardware build | |
83 | */ | |
84 | { | |
85 | struct bcr_iccm iccm; | |
86 | struct bcr_dccm dccm; | |
87 | struct bcr_dccm_base dccm_base; | |
88 | unsigned int bcr_32bit_val; | |
89 | ||
90 | bcr_32bit_val = read_aux_reg(ARC_REG_ICCM_BCR); | |
91 | if (bcr_32bit_val) { | |
92 | iccm = *((struct bcr_iccm *)&bcr_32bit_val); | |
93 | cpu->iccm.base_addr = iccm.base << 16; | |
94 | cpu->iccm.sz = 0x2000 << (iccm.sz - 1); | |
95 | } | |
96 | ||
97 | bcr_32bit_val = read_aux_reg(ARC_REG_DCCM_BCR); | |
98 | if (bcr_32bit_val) { | |
99 | dccm = *((struct bcr_dccm *)&bcr_32bit_val); | |
100 | cpu->dccm.sz = 0x800 << (dccm.sz); | |
101 | ||
102 | READ_BCR(ARC_REG_DCCMBASE_BCR, dccm_base); | |
103 | cpu->dccm.base_addr = dccm_base.addr << 8; | |
104 | } | |
105 | } | |
106 | ||
af617428 VG |
107 | READ_BCR(ARC_REG_XY_MEM_BCR, cpu->extn_xymem); |
108 | ||
c121c506 VG |
109 | read_decode_mmu_bcr(); |
110 | read_decode_cache_bcr(); | |
af617428 | 111 | |
1f6ccfff | 112 | if (is_isa_arcompact()) { |
56372082 VG |
113 | struct bcr_fp_arcompact sp, dp; |
114 | struct bcr_bpu_arcompact bpu; | |
115 | ||
116 | READ_BCR(ARC_REG_FP_BCR, sp); | |
117 | READ_BCR(ARC_REG_DPFP_BCR, dp); | |
118 | cpu->extn.fpu_sp = sp.ver ? 1 : 0; | |
119 | cpu->extn.fpu_dp = dp.ver ? 1 : 0; | |
120 | ||
121 | READ_BCR(ARC_REG_BPU_BCR, bpu); | |
122 | cpu->bpu.ver = bpu.ver; | |
123 | cpu->bpu.full = bpu.fam ? 1 : 0; | |
124 | if (bpu.ent) { | |
125 | cpu->bpu.num_cache = 256 << (bpu.ent - 1); | |
126 | cpu->bpu.num_pred = 256 << (bpu.ent - 1); | |
127 | } | |
1f6ccfff VG |
128 | } else { |
129 | struct bcr_fp_arcv2 spdp; | |
130 | struct bcr_bpu_arcv2 bpu; | |
131 | ||
132 | READ_BCR(ARC_REG_FP_V2_BCR, spdp); | |
133 | cpu->extn.fpu_sp = spdp.sp ? 1 : 0; | |
134 | cpu->extn.fpu_dp = spdp.dp ? 1 : 0; | |
135 | ||
136 | READ_BCR(ARC_REG_BPU_BCR, bpu); | |
137 | cpu->bpu.ver = bpu.ver; | |
138 | cpu->bpu.full = bpu.ft; | |
139 | cpu->bpu.num_cache = 256 << bpu.bce; | |
140 | cpu->bpu.num_pred = 2048 << bpu.pte; | |
56372082 VG |
141 | } |
142 | ||
143 | READ_BCR(ARC_REG_AP_BCR, bcr); | |
144 | cpu->extn.ap = bcr.ver ? 1 : 0; | |
145 | ||
146 | READ_BCR(ARC_REG_SMART_BCR, bcr); | |
147 | cpu->extn.smart = bcr.ver ? 1 : 0; | |
148 | ||
a44ec8bd VG |
149 | READ_BCR(ARC_REG_RTT_BCR, bcr); |
150 | cpu->extn.rtt = bcr.ver ? 1 : 0; | |
151 | ||
152 | cpu->extn.debug = cpu->extn.ap | cpu->extn.smart | cpu->extn.rtt; | |
af617428 VG |
153 | } |
154 | ||
155 | static const struct cpuinfo_data arc_cpu_tbl[] = { | |
624b71ee | 156 | #ifdef CONFIG_ISA_ARCOMPACT |
af617428 VG |
157 | { {0x20, "ARC 600" }, 0x2F}, |
158 | { {0x30, "ARC 700" }, 0x33}, | |
159 | { {0x34, "ARC 700 R4.10"}, 0x34}, | |
56372082 | 160 | { {0x35, "ARC 700 R4.11"}, 0x35}, |
624b71ee VG |
161 | #else |
162 | { {0x50, "ARC HS38 R2.0"}, 0x51}, | |
163 | { {0x52, "ARC HS38 R2.1"}, 0x52}, | |
164 | #endif | |
af617428 VG |
165 | { {0x00, NULL } } |
166 | }; | |
167 | ||
56372082 | 168 | |
8e457d6a | 169 | static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len) |
af617428 | 170 | { |
af617428 VG |
171 | struct cpuinfo_arc *cpu = &cpuinfo_arc700[cpu_id]; |
172 | struct bcr_identity *core = &cpu->core; | |
173 | const struct cpuinfo_data *tbl; | |
56372082 VG |
174 | char *isa_nm; |
175 | int i, be, atomic; | |
176 | int n = 0; | |
177 | ||
af617428 VG |
178 | FIX_PTR(cpu); |
179 | ||
1f6ccfff | 180 | if (is_isa_arcompact()) { |
56372082 VG |
181 | isa_nm = "ARCompact"; |
182 | be = IS_ENABLED(CONFIG_CPU_BIG_ENDIAN); | |
183 | ||
184 | atomic = cpu->isa.atomic1; | |
185 | if (!cpu->isa.ver) /* ISA BCR absent, use Kconfig info */ | |
186 | atomic = IS_ENABLED(CONFIG_ARC_HAS_LLSC); | |
1f6ccfff VG |
187 | } else { |
188 | isa_nm = "ARCv2"; | |
189 | be = cpu->isa.be; | |
190 | atomic = cpu->isa.atomic; | |
56372082 VG |
191 | } |
192 | ||
af617428 | 193 | n += scnprintf(buf + n, len - n, |
56372082 VG |
194 | "\nIDENTITY\t: ARCVER [%#02x] ARCNUM [%#02x] CHIPID [%#4x]\n", |
195 | core->family, core->cpu_id, core->chip_id); | |
af617428 VG |
196 | |
197 | for (tbl = &arc_cpu_tbl[0]; tbl->info.id != 0; tbl++) { | |
198 | if ((core->family >= tbl->info.id) && | |
199 | (core->family <= tbl->up_range)) { | |
200 | n += scnprintf(buf + n, len - n, | |
56372082 VG |
201 | "processor [%d]\t: %s (%s ISA) %s\n", |
202 | cpu_id, tbl->info.str, isa_nm, | |
203 | IS_AVAIL1(be, "[Big-Endian]")); | |
af617428 VG |
204 | break; |
205 | } | |
206 | } | |
207 | ||
208 | if (tbl->info.id == 0) | |
209 | n += scnprintf(buf + n, len - n, "UNKNOWN ARC Processor\n"); | |
210 | ||
211 | n += scnprintf(buf + n, len - n, "CPU speed\t: %u.%02u Mhz\n", | |
212 | (unsigned int)(arc_get_core_freq() / 1000000), | |
213 | (unsigned int)(arc_get_core_freq() / 10000) % 100); | |
214 | ||
aa93e8ef | 215 | n += scnprintf(buf + n, len - n, "Timers\t\t: %s%s%s%s\nISA Extn\t: ", |
b89bd1f4 VG |
216 | IS_AVAIL1(cpu->extn.timer0, "Timer0 "), |
217 | IS_AVAIL1(cpu->extn.timer1, "Timer1 "), | |
218 | IS_AVAIL2(cpu->extn.rtc, "Local-64-bit-Ctr ", | |
aa93e8ef | 219 | CONFIG_ARC_HAS_RTC)); |
af617428 | 220 | |
1f6ccfff VG |
221 | n += i = scnprintf(buf + n, len - n, "%s%s%s%s%s", |
222 | IS_AVAIL2(atomic, "atomic ", CONFIG_ARC_HAS_LLSC), | |
223 | IS_AVAIL2(cpu->isa.ldd, "ll64 ", CONFIG_ARC_HAS_LL64), | |
224 | IS_AVAIL1(cpu->isa.unalign, "unalign (not used)")); | |
af617428 | 225 | |
56372082 VG |
226 | if (i) |
227 | n += scnprintf(buf + n, len - n, "\n\t\t: "); | |
af617428 | 228 | |
1f6ccfff VG |
229 | if (cpu->extn_mpy.ver) { |
230 | if (cpu->extn_mpy.ver <= 0x2) { /* ARCompact */ | |
231 | n += scnprintf(buf + n, len - n, "mpy "); | |
232 | } else { | |
233 | int opt = 2; /* stock MPY/MPYH */ | |
234 | ||
235 | if (cpu->extn_mpy.dsp) /* OPT 7-9 */ | |
236 | opt = cpu->extn_mpy.dsp + 6; | |
237 | ||
238 | n += scnprintf(buf + n, len - n, "mpy[opt %d] ", opt); | |
239 | } | |
240 | n += scnprintf(buf + n, len - n, "%s", | |
b631788a | 241 | IS_USED_CFG(CONFIG_ARC_HAS_HW_MPY)); |
1f6ccfff VG |
242 | } |
243 | ||
56372082 | 244 | n += scnprintf(buf + n, len - n, "%s%s%s%s%s%s%s%s\n", |
1f6ccfff | 245 | IS_AVAIL1(cpu->isa.div_rem, "div_rem "), |
56372082 VG |
246 | IS_AVAIL1(cpu->extn.norm, "norm "), |
247 | IS_AVAIL1(cpu->extn.barrel, "barrel-shift "), | |
248 | IS_AVAIL1(cpu->extn.swap, "swap "), | |
249 | IS_AVAIL1(cpu->extn.minmax, "minmax "), | |
250 | IS_AVAIL1(cpu->extn.crc, "crc "), | |
251 | IS_AVAIL2(1, "swape", CONFIG_ARC_HAS_SWAPE)); | |
af617428 | 252 | |
56372082 VG |
253 | if (cpu->bpu.ver) |
254 | n += scnprintf(buf + n, len - n, | |
255 | "BPU\t\t: %s%s match, cache:%d, Predict Table:%d\n", | |
256 | IS_AVAIL1(cpu->bpu.full, "full"), | |
257 | IS_AVAIL1(!cpu->bpu.full, "partial"), | |
258 | cpu->bpu.num_cache, cpu->bpu.num_pred); | |
af617428 | 259 | |
56372082 VG |
260 | return buf; |
261 | } | |
af617428 | 262 | |
8e457d6a | 263 | static char *arc_extn_mumbojumbo(int cpu_id, char *buf, int len) |
af617428 VG |
264 | { |
265 | int n = 0; | |
266 | struct cpuinfo_arc *cpu = &cpuinfo_arc700[cpu_id]; | |
267 | ||
268 | FIX_PTR(cpu); | |
af617428 VG |
269 | |
270 | n += scnprintf(buf + n, len - n, | |
56372082 | 271 | "Vector Table\t: %#x\nUncached Base\t: %#x\n", |
10d11e58 | 272 | cpu->vec_base, ARC_UNCACHED_ADDR_SPACE); |
56372082 VG |
273 | |
274 | if (cpu->extn.fpu_sp || cpu->extn.fpu_dp) | |
275 | n += scnprintf(buf + n, len - n, "FPU\t\t: %s%s\n", | |
276 | IS_AVAIL1(cpu->extn.fpu_sp, "SP "), | |
277 | IS_AVAIL1(cpu->extn.fpu_dp, "DP ")); | |
278 | ||
279 | if (cpu->extn.debug) | |
280 | n += scnprintf(buf + n, len - n, "DEBUG\t\t: %s%s%s\n", | |
281 | IS_AVAIL1(cpu->extn.ap, "ActionPoint "), | |
282 | IS_AVAIL1(cpu->extn.smart, "smaRT "), | |
283 | IS_AVAIL1(cpu->extn.rtt, "RTT ")); | |
284 | ||
285 | if (cpu->dccm.sz || cpu->iccm.sz) | |
286 | n += scnprintf(buf + n, len - n, "Extn [CCM]\t: DCCM @ %x, %d KB / ICCM: @ %x, %d KB\n", | |
287 | cpu->dccm.base_addr, TO_KB(cpu->dccm.sz), | |
af617428 VG |
288 | cpu->iccm.base_addr, TO_KB(cpu->iccm.sz)); |
289 | ||
af617428 | 290 | n += scnprintf(buf + n, len - n, |
8ff14bbc | 291 | "OS ABI [v3]\t: no-legacy-syscalls\n"); |
af617428 VG |
292 | |
293 | return buf; | |
294 | } | |
295 | ||
c4b9856b | 296 | static void arc_chk_core_config(void) |
8b5850f8 | 297 | { |
8b5850f8 | 298 | struct cpuinfo_arc *cpu = &cpuinfo_arc700[smp_processor_id()]; |
c4b9856b | 299 | int fpu_enabled; |
8b5850f8 | 300 | |
b89bd1f4 | 301 | if (!cpu->extn.timer0) |
56372082 VG |
302 | panic("Timer0 is not present!\n"); |
303 | ||
b89bd1f4 | 304 | if (!cpu->extn.timer1) |
56372082 VG |
305 | panic("Timer1 is not present!\n"); |
306 | ||
b89bd1f4 | 307 | if (IS_ENABLED(CONFIG_ARC_HAS_RTC) && !cpu->extn.rtc) |
aa93e8ef VG |
308 | panic("RTC is not present\n"); |
309 | ||
8b5850f8 VG |
310 | #ifdef CONFIG_ARC_HAS_DCCM |
311 | /* | |
312 | * DCCM can be arbit placed in hardware. | |
313 | * Make sure it's placement/sz matches what Linux is built with | |
314 | */ | |
315 | if ((unsigned int)__arc_dccm_base != cpu->dccm.base_addr) | |
316 | panic("Linux built with incorrect DCCM Base address\n"); | |
317 | ||
318 | if (CONFIG_ARC_DCCM_SZ != cpu->dccm.sz) | |
319 | panic("Linux built with incorrect DCCM Size\n"); | |
320 | #endif | |
321 | ||
322 | #ifdef CONFIG_ARC_HAS_ICCM | |
323 | if (CONFIG_ARC_ICCM_SZ != cpu->iccm.sz) | |
324 | panic("Linux built with incorrect ICCM Size\n"); | |
325 | #endif | |
8b5850f8 | 326 | |
c4b9856b VG |
327 | /* |
328 | * FP hardware/software config sanity | |
329 | * -If hardware contains DPFP, kernel needs to save/restore FPU state | |
330 | * -If not, it will crash trying to save/restore the non-existant regs | |
331 | * | |
332 | * (only DPDP checked since SP has no arch visible regs) | |
333 | */ | |
334 | fpu_enabled = IS_ENABLED(CONFIG_ARC_FPU_SAVE_RESTORE); | |
af617428 | 335 | |
56372082 | 336 | if (cpu->extn.fpu_dp && !fpu_enabled) |
c4b9856b | 337 | pr_warn("CONFIG_ARC_FPU_SAVE_RESTORE needed for working apps\n"); |
56372082 | 338 | else if (!cpu->extn.fpu_dp && fpu_enabled) |
c4b9856b | 339 | panic("FPU non-existent, disable CONFIG_ARC_FPU_SAVE_RESTORE\n"); |
e78fdfef VG |
340 | |
341 | if (is_isa_arcv2() && IS_ENABLED(CONFIG_SMP) && cpu->isa.atomic && | |
4d0cb15f | 342 | IS_ENABLED(CONFIG_ARC_HAS_LLSC) && |
e78fdfef VG |
343 | !IS_ENABLED(CONFIG_ARC_STAR_9000923308)) |
344 | panic("llock/scond livelock workaround missing\n"); | |
c121c506 VG |
345 | } |
346 | ||
347 | /* | |
348 | * Initialize and setup the processor core | |
349 | * This is called by all the CPUs thus should not do special case stuff | |
350 | * such as only for boot CPU etc | |
351 | */ | |
352 | ||
ce759956 | 353 | void setup_processor(void) |
c121c506 | 354 | { |
af617428 VG |
355 | char str[512]; |
356 | int cpu_id = smp_processor_id(); | |
357 | ||
c121c506 VG |
358 | read_arc_build_cfg_regs(); |
359 | arc_init_IRQ(); | |
af617428 VG |
360 | |
361 | printk(arc_cpu_mumbojumbo(cpu_id, str, sizeof(str))); | |
362 | ||
c121c506 VG |
363 | arc_mmu_init(); |
364 | arc_cache_init(); | |
af617428 VG |
365 | |
366 | printk(arc_extn_mumbojumbo(cpu_id, str, sizeof(str))); | |
af617428 | 367 | printk(arc_platform_smp_cpuinfo()); |
af617428 | 368 | |
c4b9856b | 369 | arc_chk_core_config(); |
c121c506 VG |
370 | } |
371 | ||
59ed9413 VG |
372 | static inline int is_kernel(unsigned long addr) |
373 | { | |
374 | if (addr >= (unsigned long)_stext && addr <= (unsigned long)_end) | |
375 | return 1; | |
376 | return 0; | |
377 | } | |
378 | ||
c121c506 VG |
379 | void __init setup_arch(char **cmdline_p) |
380 | { | |
036b2c56 | 381 | #ifdef CONFIG_ARC_UBOOT_SUPPORT |
e57d339a VG |
382 | /* make sure that uboot passed pointer to cmdline/dtb is valid */ |
383 | if (uboot_tag && is_kernel((unsigned long)uboot_arg)) | |
384 | panic("Invalid uboot arg\n"); | |
385 | ||
386 | /* See if u-boot passed an external Device Tree blob */ | |
387 | machine_desc = setup_machine_fdt(uboot_arg); /* uboot_tag == 2 */ | |
036b2c56 VG |
388 | if (!machine_desc) |
389 | #endif | |
390 | { | |
e57d339a | 391 | /* No, so try the embedded one */ |
59ed9413 VG |
392 | machine_desc = setup_machine_fdt(__dtb_start); |
393 | if (!machine_desc) | |
394 | panic("Embedded DT invalid\n"); | |
395 | ||
396 | /* | |
e57d339a VG |
397 | * If we are here, it is established that @uboot_arg didn't |
398 | * point to DT blob. Instead if u-boot says it is cmdline, | |
399 | * Appent to embedded DT cmdline. | |
59ed9413 VG |
400 | * setup_machine_fdt() would have populated @boot_command_line |
401 | */ | |
402 | if (uboot_tag == 1) { | |
59ed9413 VG |
403 | /* Ensure a whitespace between the 2 cmdlines */ |
404 | strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); | |
405 | strlcat(boot_command_line, uboot_arg, | |
406 | COMMAND_LINE_SIZE); | |
407 | } | |
e57d339a | 408 | } |
c121c506 VG |
409 | |
410 | /* Save unparsed command line copy for /proc/cmdline */ | |
9593a933 | 411 | *cmdline_p = boot_command_line; |
999159a5 | 412 | |
c121c506 VG |
413 | /* To force early parsing of things like mem=xxx */ |
414 | parse_early_param(); | |
415 | ||
416 | /* Platform/board specific: e.g. early console registration */ | |
03a6d28c VG |
417 | if (machine_desc->init_early) |
418 | machine_desc->init_early(); | |
c121c506 | 419 | |
41195d23 | 420 | smp_init_cpus(); |
e55af4da VG |
421 | |
422 | setup_processor(); | |
c121c506 VG |
423 | setup_arch_memory(); |
424 | ||
eab6a08c | 425 | /* copy flat DT out of .init and then unflatten it */ |
1efc959e | 426 | unflatten_and_copy_device_tree(); |
999159a5 | 427 | |
c121c506 VG |
428 | /* Can be issue if someone passes cmd line arg "ro" |
429 | * But that is unlikely so keeping it as it is | |
430 | */ | |
431 | root_mountflags &= ~MS_RDONLY; | |
432 | ||
c121c506 VG |
433 | #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE) |
434 | conswitchp = &dummy_con; | |
435 | #endif | |
436 | ||
854a0d95 | 437 | arc_unwind_init(); |
c121c506 VG |
438 | } |
439 | ||
03a6d28c VG |
440 | static int __init customize_machine(void) |
441 | { | |
d7f8a085 VG |
442 | of_clk_init(NULL); |
443 | /* | |
444 | * Traverses flattened DeviceTree - registering platform devices | |
445 | * (if any) complete with their resources | |
446 | */ | |
447 | of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); | |
448 | ||
03a6d28c VG |
449 | if (machine_desc->init_machine) |
450 | machine_desc->init_machine(); | |
451 | ||
452 | return 0; | |
453 | } | |
454 | arch_initcall(customize_machine); | |
455 | ||
456 | static int __init init_late_machine(void) | |
457 | { | |
458 | if (machine_desc->init_late) | |
459 | machine_desc->init_late(); | |
460 | ||
461 | return 0; | |
462 | } | |
463 | late_initcall(init_late_machine); | |
c121c506 VG |
464 | /* |
465 | * Get CPU information for use by the procfs. | |
466 | */ | |
467 | ||
468 | #define cpu_to_ptr(c) ((void *)(0xFFFF0000 | (unsigned int)(c))) | |
469 | #define ptr_to_cpu(p) (~0xFFFF0000UL & (unsigned int)(p)) | |
470 | ||
471 | static int show_cpuinfo(struct seq_file *m, void *v) | |
472 | { | |
473 | char *str; | |
474 | int cpu_id = ptr_to_cpu(v); | |
475 | ||
4c86231c VG |
476 | if (!cpu_online(cpu_id)) { |
477 | seq_printf(m, "processor [%d]\t: Offline\n", cpu_id); | |
478 | goto done; | |
479 | } | |
480 | ||
c121c506 VG |
481 | str = (char *)__get_free_page(GFP_TEMPORARY); |
482 | if (!str) | |
483 | goto done; | |
484 | ||
af617428 | 485 | seq_printf(m, arc_cpu_mumbojumbo(cpu_id, str, PAGE_SIZE)); |
c121c506 | 486 | |
56372082 | 487 | seq_printf(m, "Bogo MIPS\t: %lu.%02lu\n", |
c121c506 VG |
488 | loops_per_jiffy / (500000 / HZ), |
489 | (loops_per_jiffy / (5000 / HZ)) % 100); | |
490 | ||
af617428 | 491 | seq_printf(m, arc_mmu_mumbojumbo(cpu_id, str, PAGE_SIZE)); |
af617428 | 492 | seq_printf(m, arc_cache_mumbojumbo(cpu_id, str, PAGE_SIZE)); |
af617428 | 493 | seq_printf(m, arc_extn_mumbojumbo(cpu_id, str, PAGE_SIZE)); |
af617428 | 494 | seq_printf(m, arc_platform_smp_cpuinfo()); |
af617428 | 495 | |
c121c506 VG |
496 | free_page((unsigned long)str); |
497 | done: | |
4c86231c | 498 | seq_printf(m, "\n"); |
c121c506 VG |
499 | |
500 | return 0; | |
501 | } | |
502 | ||
503 | static void *c_start(struct seq_file *m, loff_t *pos) | |
504 | { | |
505 | /* | |
506 | * Callback returns cpu-id to iterator for show routine, NULL to stop. | |
507 | * However since NULL is also a valid cpu-id (0), we use a round-about | |
508 | * way to pass it w/o having to kmalloc/free a 2 byte string. | |
509 | * Encode cpu-id as 0xFFcccc, which is decoded by show routine. | |
510 | */ | |
511 | return *pos < num_possible_cpus() ? cpu_to_ptr(*pos) : NULL; | |
512 | } | |
513 | ||
514 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
515 | { | |
516 | ++*pos; | |
517 | return c_start(m, pos); | |
518 | } | |
519 | ||
520 | static void c_stop(struct seq_file *m, void *v) | |
521 | { | |
522 | } | |
523 | ||
524 | const struct seq_operations cpuinfo_op = { | |
525 | .start = c_start, | |
526 | .next = c_next, | |
527 | .stop = c_stop, | |
528 | .show = show_cpuinfo | |
529 | }; | |
530 | ||
531 | static DEFINE_PER_CPU(struct cpu, cpu_topology); | |
532 | ||
533 | static int __init topology_init(void) | |
534 | { | |
535 | int cpu; | |
536 | ||
537 | for_each_present_cpu(cpu) | |
538 | register_cpu(&per_cpu(cpu_topology, cpu), cpu); | |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
543 | subsys_initcall(topology_init); |