Thomas Gleixner | c942fdd | 2019-05-27 08:55:06 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2010, 2011, 2012, Lemote, Inc. |
| 4 | * Author: Chen Huacai, chenhc@lemote.com |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #include <linux/init.h> |
| 8 | #include <linux/cpu.h> |
| 9 | #include <linux/sched.h> |
Ingo Molnar | ef8bd77 | 2017-02-08 18:51:36 +0100 | [diff] [blame] | 10 | #include <linux/sched/hotplug.h> |
Ingo Molnar | 68db0cf | 2017-02-08 18:51:37 +0100 | [diff] [blame] | 11 | #include <linux/sched/task_stack.h> |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 12 | #include <linux/smp.h> |
| 13 | #include <linux/cpufreq.h> |
Dengcheng Zhu | 62cac48 | 2018-09-11 14:49:21 -0700 | [diff] [blame] | 14 | #include <linux/kexec.h> |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 15 | #include <asm/processor.h> |
| 16 | #include <asm/time.h> |
| 17 | #include <asm/clock.h> |
| 18 | #include <asm/tlbflush.h> |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 19 | #include <asm/cacheflush.h> |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 20 | #include <loongson.h> |
Huacai Chen | ffe59ee | 2019-09-21 21:50:28 +0800 | [diff] [blame] | 21 | #include <loongson_regs.h> |
Huacai Chen | 3adeb25 | 2014-11-04 14:13:27 +0800 | [diff] [blame] | 22 | #include <workarounds.h> |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 23 | |
| 24 | #include "smp.h" |
| 25 | |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 26 | DEFINE_PER_CPU(int, cpu_state); |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 27 | |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 28 | static void *ipi_set0_regs[16]; |
| 29 | static void *ipi_clear0_regs[16]; |
| 30 | static void *ipi_status0_regs[16]; |
| 31 | static void *ipi_en0_regs[16]; |
| 32 | static void *ipi_mailbox_buf[16]; |
Huacai Chen | 5754843 | 2016-01-21 21:09:49 +0800 | [diff] [blame] | 33 | static uint32_t core0_c0count[NR_CPUS]; |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 34 | |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 35 | /* read a 32bit value from ipi register */ |
| 36 | #define loongson3_ipi_read32(addr) readl(addr) |
| 37 | /* read a 64bit value from ipi register */ |
| 38 | #define loongson3_ipi_read64(addr) readq(addr) |
| 39 | /* write a 32bit value to ipi register */ |
| 40 | #define loongson3_ipi_write32(action, addr) \ |
| 41 | do { \ |
| 42 | writel(action, addr); \ |
| 43 | __wbflush(); \ |
| 44 | } while (0) |
| 45 | /* write a 64bit value to ipi register */ |
| 46 | #define loongson3_ipi_write64(action, addr) \ |
| 47 | do { \ |
| 48 | writeq(action, addr); \ |
| 49 | __wbflush(); \ |
| 50 | } while (0) |
| 51 | |
Huacai Chen | ffe59ee | 2019-09-21 21:50:28 +0800 | [diff] [blame] | 52 | u32 (*ipi_read_clear)(int cpu); |
| 53 | void (*ipi_write_action)(int cpu, u32 action); |
| 54 | |
| 55 | static u32 csr_ipi_read_clear(int cpu) |
| 56 | { |
| 57 | u32 action; |
| 58 | |
| 59 | /* Load the ipi register to figure out what we're supposed to do */ |
| 60 | action = csr_readl(LOONGSON_CSR_IPI_STATUS); |
| 61 | /* Clear the ipi register to clear the interrupt */ |
| 62 | csr_writel(action, LOONGSON_CSR_IPI_CLEAR); |
| 63 | |
| 64 | return action; |
| 65 | } |
| 66 | |
| 67 | static void csr_ipi_write_action(int cpu, u32 action) |
| 68 | { |
| 69 | unsigned int irq = 0; |
| 70 | |
| 71 | while ((irq = ffs(action))) { |
| 72 | uint32_t val = CSR_IPI_SEND_BLOCK; |
| 73 | val |= (irq - 1); |
| 74 | val |= (cpu << CSR_IPI_SEND_CPU_SHIFT); |
| 75 | csr_writel(val, LOONGSON_CSR_IPI_SEND); |
| 76 | action &= ~BIT(irq - 1); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | static u32 legacy_ipi_read_clear(int cpu) |
| 81 | { |
| 82 | u32 action; |
| 83 | |
| 84 | /* Load the ipi register to figure out what we're supposed to do */ |
| 85 | action = loongson3_ipi_read32(ipi_status0_regs[cpu_logical_map(cpu)]); |
| 86 | /* Clear the ipi register to clear the interrupt */ |
| 87 | loongson3_ipi_write32(action, ipi_clear0_regs[cpu_logical_map(cpu)]); |
| 88 | |
| 89 | return action; |
| 90 | } |
| 91 | |
| 92 | static void legacy_ipi_write_action(int cpu, u32 action) |
| 93 | { |
| 94 | loongson3_ipi_write32((u32)action, ipi_set0_regs[cpu]); |
| 95 | } |
| 96 | |
| 97 | static void csr_ipi_probe(void) |
| 98 | { |
| 99 | if (cpu_has_csr() && csr_readl(LOONGSON_CSR_FEATURES) & LOONGSON_CSRF_IPI) { |
| 100 | ipi_read_clear = csr_ipi_read_clear; |
| 101 | ipi_write_action = csr_ipi_write_action; |
| 102 | } else { |
| 103 | ipi_read_clear = legacy_ipi_read_clear; |
| 104 | ipi_write_action = legacy_ipi_write_action; |
| 105 | } |
| 106 | } |
| 107 | |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 108 | static void ipi_set0_regs_init(void) |
| 109 | { |
| 110 | ipi_set0_regs[0] = (void *) |
| 111 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + SET0); |
| 112 | ipi_set0_regs[1] = (void *) |
| 113 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + SET0); |
| 114 | ipi_set0_regs[2] = (void *) |
| 115 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + SET0); |
| 116 | ipi_set0_regs[3] = (void *) |
| 117 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + SET0); |
| 118 | ipi_set0_regs[4] = (void *) |
| 119 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + SET0); |
| 120 | ipi_set0_regs[5] = (void *) |
| 121 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + SET0); |
| 122 | ipi_set0_regs[6] = (void *) |
| 123 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + SET0); |
| 124 | ipi_set0_regs[7] = (void *) |
| 125 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + SET0); |
| 126 | ipi_set0_regs[8] = (void *) |
| 127 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + SET0); |
| 128 | ipi_set0_regs[9] = (void *) |
| 129 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + SET0); |
| 130 | ipi_set0_regs[10] = (void *) |
| 131 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + SET0); |
| 132 | ipi_set0_regs[11] = (void *) |
| 133 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + SET0); |
| 134 | ipi_set0_regs[12] = (void *) |
| 135 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + SET0); |
| 136 | ipi_set0_regs[13] = (void *) |
| 137 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + SET0); |
| 138 | ipi_set0_regs[14] = (void *) |
| 139 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + SET0); |
| 140 | ipi_set0_regs[15] = (void *) |
| 141 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + SET0); |
| 142 | } |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 143 | |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 144 | static void ipi_clear0_regs_init(void) |
| 145 | { |
| 146 | ipi_clear0_regs[0] = (void *) |
| 147 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + CLEAR0); |
| 148 | ipi_clear0_regs[1] = (void *) |
| 149 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + CLEAR0); |
| 150 | ipi_clear0_regs[2] = (void *) |
| 151 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + CLEAR0); |
| 152 | ipi_clear0_regs[3] = (void *) |
| 153 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + CLEAR0); |
| 154 | ipi_clear0_regs[4] = (void *) |
| 155 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + CLEAR0); |
| 156 | ipi_clear0_regs[5] = (void *) |
| 157 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + CLEAR0); |
| 158 | ipi_clear0_regs[6] = (void *) |
| 159 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + CLEAR0); |
| 160 | ipi_clear0_regs[7] = (void *) |
| 161 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + CLEAR0); |
| 162 | ipi_clear0_regs[8] = (void *) |
| 163 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + CLEAR0); |
| 164 | ipi_clear0_regs[9] = (void *) |
| 165 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + CLEAR0); |
| 166 | ipi_clear0_regs[10] = (void *) |
| 167 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + CLEAR0); |
| 168 | ipi_clear0_regs[11] = (void *) |
| 169 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + CLEAR0); |
| 170 | ipi_clear0_regs[12] = (void *) |
| 171 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + CLEAR0); |
| 172 | ipi_clear0_regs[13] = (void *) |
| 173 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + CLEAR0); |
| 174 | ipi_clear0_regs[14] = (void *) |
| 175 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + CLEAR0); |
| 176 | ipi_clear0_regs[15] = (void *) |
| 177 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + CLEAR0); |
| 178 | } |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 179 | |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 180 | static void ipi_status0_regs_init(void) |
| 181 | { |
| 182 | ipi_status0_regs[0] = (void *) |
| 183 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + STATUS0); |
| 184 | ipi_status0_regs[1] = (void *) |
| 185 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + STATUS0); |
| 186 | ipi_status0_regs[2] = (void *) |
| 187 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + STATUS0); |
| 188 | ipi_status0_regs[3] = (void *) |
| 189 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + STATUS0); |
| 190 | ipi_status0_regs[4] = (void *) |
| 191 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + STATUS0); |
| 192 | ipi_status0_regs[5] = (void *) |
| 193 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + STATUS0); |
| 194 | ipi_status0_regs[6] = (void *) |
| 195 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + STATUS0); |
| 196 | ipi_status0_regs[7] = (void *) |
| 197 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + STATUS0); |
| 198 | ipi_status0_regs[8] = (void *) |
| 199 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + STATUS0); |
| 200 | ipi_status0_regs[9] = (void *) |
| 201 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + STATUS0); |
| 202 | ipi_status0_regs[10] = (void *) |
| 203 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + STATUS0); |
| 204 | ipi_status0_regs[11] = (void *) |
| 205 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + STATUS0); |
| 206 | ipi_status0_regs[12] = (void *) |
| 207 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + STATUS0); |
| 208 | ipi_status0_regs[13] = (void *) |
| 209 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + STATUS0); |
| 210 | ipi_status0_regs[14] = (void *) |
| 211 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + STATUS0); |
| 212 | ipi_status0_regs[15] = (void *) |
| 213 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + STATUS0); |
| 214 | } |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 215 | |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 216 | static void ipi_en0_regs_init(void) |
| 217 | { |
| 218 | ipi_en0_regs[0] = (void *) |
| 219 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + EN0); |
| 220 | ipi_en0_regs[1] = (void *) |
| 221 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + EN0); |
| 222 | ipi_en0_regs[2] = (void *) |
| 223 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + EN0); |
| 224 | ipi_en0_regs[3] = (void *) |
| 225 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + EN0); |
| 226 | ipi_en0_regs[4] = (void *) |
| 227 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + EN0); |
| 228 | ipi_en0_regs[5] = (void *) |
| 229 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + EN0); |
| 230 | ipi_en0_regs[6] = (void *) |
| 231 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + EN0); |
| 232 | ipi_en0_regs[7] = (void *) |
| 233 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + EN0); |
| 234 | ipi_en0_regs[8] = (void *) |
| 235 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + EN0); |
| 236 | ipi_en0_regs[9] = (void *) |
| 237 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + EN0); |
| 238 | ipi_en0_regs[10] = (void *) |
| 239 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + EN0); |
| 240 | ipi_en0_regs[11] = (void *) |
| 241 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + EN0); |
| 242 | ipi_en0_regs[12] = (void *) |
| 243 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + EN0); |
| 244 | ipi_en0_regs[13] = (void *) |
| 245 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + EN0); |
| 246 | ipi_en0_regs[14] = (void *) |
| 247 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + EN0); |
| 248 | ipi_en0_regs[15] = (void *) |
| 249 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + EN0); |
| 250 | } |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 251 | |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 252 | static void ipi_mailbox_buf_init(void) |
| 253 | { |
| 254 | ipi_mailbox_buf[0] = (void *) |
| 255 | (SMP_CORE_GROUP0_BASE + SMP_CORE0_OFFSET + BUF); |
| 256 | ipi_mailbox_buf[1] = (void *) |
| 257 | (SMP_CORE_GROUP0_BASE + SMP_CORE1_OFFSET + BUF); |
| 258 | ipi_mailbox_buf[2] = (void *) |
| 259 | (SMP_CORE_GROUP0_BASE + SMP_CORE2_OFFSET + BUF); |
| 260 | ipi_mailbox_buf[3] = (void *) |
| 261 | (SMP_CORE_GROUP0_BASE + SMP_CORE3_OFFSET + BUF); |
| 262 | ipi_mailbox_buf[4] = (void *) |
| 263 | (SMP_CORE_GROUP1_BASE + SMP_CORE0_OFFSET + BUF); |
| 264 | ipi_mailbox_buf[5] = (void *) |
| 265 | (SMP_CORE_GROUP1_BASE + SMP_CORE1_OFFSET + BUF); |
| 266 | ipi_mailbox_buf[6] = (void *) |
| 267 | (SMP_CORE_GROUP1_BASE + SMP_CORE2_OFFSET + BUF); |
| 268 | ipi_mailbox_buf[7] = (void *) |
| 269 | (SMP_CORE_GROUP1_BASE + SMP_CORE3_OFFSET + BUF); |
| 270 | ipi_mailbox_buf[8] = (void *) |
| 271 | (SMP_CORE_GROUP2_BASE + SMP_CORE0_OFFSET + BUF); |
| 272 | ipi_mailbox_buf[9] = (void *) |
| 273 | (SMP_CORE_GROUP2_BASE + SMP_CORE1_OFFSET + BUF); |
| 274 | ipi_mailbox_buf[10] = (void *) |
| 275 | (SMP_CORE_GROUP2_BASE + SMP_CORE2_OFFSET + BUF); |
| 276 | ipi_mailbox_buf[11] = (void *) |
| 277 | (SMP_CORE_GROUP2_BASE + SMP_CORE3_OFFSET + BUF); |
| 278 | ipi_mailbox_buf[12] = (void *) |
| 279 | (SMP_CORE_GROUP3_BASE + SMP_CORE0_OFFSET + BUF); |
| 280 | ipi_mailbox_buf[13] = (void *) |
| 281 | (SMP_CORE_GROUP3_BASE + SMP_CORE1_OFFSET + BUF); |
| 282 | ipi_mailbox_buf[14] = (void *) |
| 283 | (SMP_CORE_GROUP3_BASE + SMP_CORE2_OFFSET + BUF); |
| 284 | ipi_mailbox_buf[15] = (void *) |
| 285 | (SMP_CORE_GROUP3_BASE + SMP_CORE3_OFFSET + BUF); |
| 286 | } |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 287 | |
| 288 | /* |
| 289 | * Simple enough, just poke the appropriate ipi register |
| 290 | */ |
| 291 | static void loongson3_send_ipi_single(int cpu, unsigned int action) |
| 292 | { |
Huacai Chen | ffe59ee | 2019-09-21 21:50:28 +0800 | [diff] [blame] | 293 | ipi_write_action(cpu_logical_map(cpu), (u32)action); |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 294 | } |
| 295 | |
| 296 | static void |
| 297 | loongson3_send_ipi_mask(const struct cpumask *mask, unsigned int action) |
| 298 | { |
| 299 | unsigned int i; |
| 300 | |
| 301 | for_each_cpu(i, mask) |
Huacai Chen | ffe59ee | 2019-09-21 21:50:28 +0800 | [diff] [blame] | 302 | ipi_write_action(cpu_logical_map(i), (u32)action); |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 303 | } |
| 304 | |
Huacai Chen | e1b88ca | 2017-06-22 23:06:52 +0800 | [diff] [blame] | 305 | #define IPI_IRQ_OFFSET 6 |
| 306 | |
| 307 | void loongson3_send_irq_by_ipi(int cpu, int irqs) |
| 308 | { |
Huacai Chen | ffe59ee | 2019-09-21 21:50:28 +0800 | [diff] [blame] | 309 | ipi_write_action(cpu_logical_map(cpu), irqs << IPI_IRQ_OFFSET); |
Huacai Chen | e1b88ca | 2017-06-22 23:06:52 +0800 | [diff] [blame] | 310 | } |
| 311 | |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 312 | void loongson3_ipi_interrupt(struct pt_regs *regs) |
| 313 | { |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 314 | int i, cpu = smp_processor_id(); |
Huacai Chen | e1b88ca | 2017-06-22 23:06:52 +0800 | [diff] [blame] | 315 | unsigned int action, c0count, irqs; |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 316 | |
Huacai Chen | ffe59ee | 2019-09-21 21:50:28 +0800 | [diff] [blame] | 317 | action = ipi_read_clear(cpu); |
Huacai Chen | e1b88ca | 2017-06-22 23:06:52 +0800 | [diff] [blame] | 318 | irqs = action >> IPI_IRQ_OFFSET; |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 319 | |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 320 | if (action & SMP_RESCHEDULE_YOURSELF) |
| 321 | scheduler_ipi(); |
| 322 | |
Alex Smith | 4ace613 | 2015-07-24 16:57:49 +0100 | [diff] [blame] | 323 | if (action & SMP_CALL_FUNCTION) { |
| 324 | irq_enter(); |
| 325 | generic_smp_call_function_interrupt(); |
| 326 | irq_exit(); |
| 327 | } |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 328 | |
| 329 | if (action & SMP_ASK_C0COUNT) { |
| 330 | BUG_ON(cpu != 0); |
| 331 | c0count = read_c0_count(); |
Huacai Chen | 5754843 | 2016-01-21 21:09:49 +0800 | [diff] [blame] | 332 | c0count = c0count ? c0count : 1; |
| 333 | for (i = 1; i < nr_cpu_ids; i++) |
| 334 | core0_c0count[i] = c0count; |
| 335 | __wbflush(); /* Let others see the result ASAP */ |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 336 | } |
Huacai Chen | e1b88ca | 2017-06-22 23:06:52 +0800 | [diff] [blame] | 337 | |
| 338 | if (irqs) { |
| 339 | int irq; |
| 340 | while ((irq = ffs(irqs))) { |
| 341 | do_IRQ(irq-1); |
| 342 | irqs &= ~(1<<(irq-1)); |
| 343 | } |
| 344 | } |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 345 | } |
| 346 | |
Huacai Chen | 5754843 | 2016-01-21 21:09:49 +0800 | [diff] [blame] | 347 | #define MAX_LOOPS 800 |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 348 | /* |
| 349 | * SMP init and finish on secondary CPUs |
| 350 | */ |
| 351 | static void loongson3_init_secondary(void) |
| 352 | { |
| 353 | int i; |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 354 | uint32_t initcount; |
| 355 | unsigned int cpu = smp_processor_id(); |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 356 | unsigned int imask = STATUSF_IP7 | STATUSF_IP6 | |
| 357 | STATUSF_IP3 | STATUSF_IP2; |
| 358 | |
| 359 | /* Set interrupt mask, but don't enable */ |
| 360 | change_c0_status(ST0_IM, imask); |
| 361 | |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 362 | for (i = 0; i < num_possible_cpus(); i++) |
| 363 | loongson3_ipi_write32(0xffffffff, ipi_en0_regs[cpu_logical_map(i)]); |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 364 | |
| 365 | per_cpu(cpu_state, cpu) = CPU_ONLINE; |
Paul Burton | f875a832 | 2017-08-12 19:49:35 -0700 | [diff] [blame] | 366 | cpu_set_core(&cpu_data[cpu], |
| 367 | cpu_logical_map(cpu) % loongson_sysconf.cores_per_package); |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 368 | cpu_data[cpu].package = |
| 369 | cpu_logical_map(cpu) / loongson_sysconf.cores_per_package; |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 370 | |
| 371 | i = 0; |
Huacai Chen | 5754843 | 2016-01-21 21:09:49 +0800 | [diff] [blame] | 372 | core0_c0count[cpu] = 0; |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 373 | loongson3_send_ipi_single(0, SMP_ASK_C0COUNT); |
Huacai Chen | 5754843 | 2016-01-21 21:09:49 +0800 | [diff] [blame] | 374 | while (!core0_c0count[cpu]) { |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 375 | i++; |
| 376 | cpu_relax(); |
| 377 | } |
| 378 | |
| 379 | if (i > MAX_LOOPS) |
| 380 | i = MAX_LOOPS; |
Huacai Chen | 5754843 | 2016-01-21 21:09:49 +0800 | [diff] [blame] | 381 | if (cpu_data[cpu].package) |
| 382 | initcount = core0_c0count[cpu] + i; |
| 383 | else /* Local access is faster for loops */ |
| 384 | initcount = core0_c0count[cpu] + i/2; |
| 385 | |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 386 | write_c0_count(initcount); |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 387 | } |
| 388 | |
| 389 | static void loongson3_smp_finish(void) |
| 390 | { |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 391 | int cpu = smp_processor_id(); |
| 392 | |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 393 | write_c0_compare(read_c0_count() + mips_hpt_frequency/HZ); |
| 394 | local_irq_enable(); |
| 395 | loongson3_ipi_write64(0, |
Paul Burton | 4988154 | 2018-08-31 11:49:20 -0700 | [diff] [blame] | 396 | ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x0); |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 397 | pr_info("CPU#%d finished, CP0_ST=%x\n", |
| 398 | smp_processor_id(), read_c0_status()); |
| 399 | } |
| 400 | |
| 401 | static void __init loongson3_smp_setup(void) |
| 402 | { |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 403 | int i = 0, num = 0; /* i: physical id, num: logical id */ |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 404 | |
| 405 | init_cpu_possible(cpu_none_mask); |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 406 | |
| 407 | /* For unified kernel, NR_CPUS is the maximum possible value, |
| 408 | * loongson_sysconf.nr_cpus is the really present value */ |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 409 | while (i < loongson_sysconf.nr_cpus) { |
| 410 | if (loongson_sysconf.reserved_cpus_mask & (1<<i)) { |
| 411 | /* Reserved physical CPU cores */ |
| 412 | __cpu_number_map[i] = -1; |
| 413 | } else { |
| 414 | __cpu_number_map[i] = num; |
| 415 | __cpu_logical_map[num] = i; |
| 416 | set_cpu_possible(num, true); |
| 417 | num++; |
| 418 | } |
| 419 | i++; |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 420 | } |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 421 | pr_info("Detected %i available CPU(s)\n", num); |
| 422 | |
| 423 | while (num < loongson_sysconf.nr_cpus) { |
| 424 | __cpu_logical_map[num] = -1; |
| 425 | num++; |
| 426 | } |
| 427 | |
Huacai Chen | ffe59ee | 2019-09-21 21:50:28 +0800 | [diff] [blame] | 428 | csr_ipi_probe(); |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 429 | ipi_set0_regs_init(); |
| 430 | ipi_clear0_regs_init(); |
| 431 | ipi_status0_regs_init(); |
| 432 | ipi_en0_regs_init(); |
| 433 | ipi_mailbox_buf_init(); |
Paul Burton | f875a832 | 2017-08-12 19:49:35 -0700 | [diff] [blame] | 434 | cpu_set_core(&cpu_data[0], |
| 435 | cpu_logical_map(0) % loongson_sysconf.cores_per_package); |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 436 | cpu_data[0].package = cpu_logical_map(0) / loongson_sysconf.cores_per_package; |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 437 | } |
| 438 | |
| 439 | static void __init loongson3_prepare_cpus(unsigned int max_cpus) |
| 440 | { |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 441 | init_cpu_present(cpu_possible_mask); |
| 442 | per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE; |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 443 | } |
| 444 | |
| 445 | /* |
| 446 | * Setup the PC, SP, and GP of a secondary processor and start it runing! |
| 447 | */ |
Paul Burton | d595d42 | 2017-08-12 19:49:40 -0700 | [diff] [blame] | 448 | static int loongson3_boot_secondary(int cpu, struct task_struct *idle) |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 449 | { |
| 450 | unsigned long startargs[4]; |
| 451 | |
| 452 | pr_info("Booting CPU#%d...\n", cpu); |
| 453 | |
| 454 | /* startargs[] are initial PC, SP and GP for secondary CPU */ |
| 455 | startargs[0] = (unsigned long)&smp_bootstrap; |
| 456 | startargs[1] = (unsigned long)__KSTK_TOS(idle); |
| 457 | startargs[2] = (unsigned long)task_thread_info(idle); |
| 458 | startargs[3] = 0; |
| 459 | |
| 460 | pr_debug("CPU#%d, func_pc=%lx, sp=%lx, gp=%lx\n", |
| 461 | cpu, startargs[0], startargs[1], startargs[2]); |
| 462 | |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 463 | loongson3_ipi_write64(startargs[3], |
Paul Burton | 4988154 | 2018-08-31 11:49:20 -0700 | [diff] [blame] | 464 | ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x18); |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 465 | loongson3_ipi_write64(startargs[2], |
Paul Burton | 4988154 | 2018-08-31 11:49:20 -0700 | [diff] [blame] | 466 | ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x10); |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 467 | loongson3_ipi_write64(startargs[1], |
Paul Burton | 4988154 | 2018-08-31 11:49:20 -0700 | [diff] [blame] | 468 | ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x8); |
Huacai Chen | ec0f8d3 | 2014-11-04 14:13:26 +0800 | [diff] [blame] | 469 | loongson3_ipi_write64(startargs[0], |
Paul Burton | 4988154 | 2018-08-31 11:49:20 -0700 | [diff] [blame] | 470 | ipi_mailbox_buf[cpu_logical_map(cpu)] + 0x0); |
Paul Burton | d595d42 | 2017-08-12 19:49:40 -0700 | [diff] [blame] | 471 | return 0; |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 472 | } |
| 473 | |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 474 | #ifdef CONFIG_HOTPLUG_CPU |
| 475 | |
| 476 | static int loongson3_cpu_disable(void) |
| 477 | { |
| 478 | unsigned long flags; |
| 479 | unsigned int cpu = smp_processor_id(); |
| 480 | |
| 481 | if (cpu == 0) |
| 482 | return -EBUSY; |
| 483 | |
| 484 | set_cpu_online(cpu, false); |
James Hogan | 826e99b | 2016-07-13 14:12:45 +0100 | [diff] [blame] | 485 | calculate_cpu_foreign_map(); |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 486 | local_irq_save(flags); |
| 487 | fixup_irqs(); |
| 488 | local_irq_restore(flags); |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 489 | local_flush_tlb_all(); |
| 490 | |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | |
| 495 | static void loongson3_cpu_die(unsigned int cpu) |
| 496 | { |
| 497 | while (per_cpu(cpu_state, cpu) != CPU_DEAD) |
| 498 | cpu_relax(); |
| 499 | |
| 500 | mb(); |
| 501 | } |
| 502 | |
| 503 | /* To shutdown a core in Loongson 3, the target core should go to CKSEG1 and |
| 504 | * flush all L1 entries at first. Then, another core (usually Core 0) can |
| 505 | * safely disable the clock of the target core. loongson3_play_dead() is |
| 506 | * called via CKSEG1 (uncached and unmmaped) */ |
Huacai Chen | 7507445 | 2019-09-21 21:50:27 +0800 | [diff] [blame] | 507 | static void loongson3_type1_play_dead(int *state_addr) |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 508 | { |
| 509 | register int val; |
| 510 | register long cpuid, core, node, count; |
| 511 | register void *addr, *base, *initfunc; |
| 512 | |
| 513 | __asm__ __volatile__( |
| 514 | " .set push \n" |
| 515 | " .set noreorder \n" |
| 516 | " li %[addr], 0x80000000 \n" /* KSEG0 */ |
| 517 | "1: cache 0, 0(%[addr]) \n" /* flush L1 ICache */ |
| 518 | " cache 0, 1(%[addr]) \n" |
| 519 | " cache 0, 2(%[addr]) \n" |
| 520 | " cache 0, 3(%[addr]) \n" |
| 521 | " cache 1, 0(%[addr]) \n" /* flush L1 DCache */ |
| 522 | " cache 1, 1(%[addr]) \n" |
| 523 | " cache 1, 2(%[addr]) \n" |
| 524 | " cache 1, 3(%[addr]) \n" |
| 525 | " addiu %[sets], %[sets], -1 \n" |
| 526 | " bnez %[sets], 1b \n" |
| 527 | " addiu %[addr], %[addr], 0x20 \n" |
| 528 | " li %[val], 0x7 \n" /* *state_addr = CPU_DEAD; */ |
| 529 | " sw %[val], (%[state_addr]) \n" |
| 530 | " sync \n" |
| 531 | " cache 21, (%[state_addr]) \n" /* flush entry of *state_addr */ |
| 532 | " .set pop \n" |
| 533 | : [addr] "=&r" (addr), [val] "=&r" (val) |
| 534 | : [state_addr] "r" (state_addr), |
| 535 | [sets] "r" (cpu_data[smp_processor_id()].dcache.sets)); |
| 536 | |
| 537 | __asm__ __volatile__( |
| 538 | " .set push \n" |
| 539 | " .set noreorder \n" |
| 540 | " .set mips64 \n" |
| 541 | " mfc0 %[cpuid], $15, 1 \n" |
| 542 | " andi %[cpuid], 0x3ff \n" |
| 543 | " dli %[base], 0x900000003ff01000 \n" |
| 544 | " andi %[core], %[cpuid], 0x3 \n" |
| 545 | " sll %[core], 8 \n" /* get core id */ |
| 546 | " or %[base], %[base], %[core] \n" |
| 547 | " andi %[node], %[cpuid], 0xc \n" |
| 548 | " dsll %[node], 42 \n" /* get node id */ |
| 549 | " or %[base], %[base], %[node] \n" |
| 550 | "1: li %[count], 0x100 \n" /* wait for init loop */ |
| 551 | "2: bnez %[count], 2b \n" /* limit mailbox access */ |
| 552 | " addiu %[count], -1 \n" |
| 553 | " ld %[initfunc], 0x20(%[base]) \n" /* get PC via mailbox */ |
| 554 | " beqz %[initfunc], 1b \n" |
| 555 | " nop \n" |
| 556 | " ld $sp, 0x28(%[base]) \n" /* get SP via mailbox */ |
| 557 | " ld $gp, 0x30(%[base]) \n" /* get GP via mailbox */ |
| 558 | " ld $a1, 0x38(%[base]) \n" |
| 559 | " jr %[initfunc] \n" /* jump to initial PC */ |
| 560 | " nop \n" |
| 561 | " .set pop \n" |
| 562 | : [core] "=&r" (core), [node] "=&r" (node), |
| 563 | [base] "=&r" (base), [cpuid] "=&r" (cpuid), |
| 564 | [count] "=&r" (count), [initfunc] "=&r" (initfunc) |
| 565 | : /* No Input */ |
| 566 | : "a1"); |
| 567 | } |
| 568 | |
Huacai Chen | 7507445 | 2019-09-21 21:50:27 +0800 | [diff] [blame] | 569 | static void loongson3_type2_play_dead(int *state_addr) |
| 570 | { |
| 571 | register int val; |
| 572 | register long cpuid, core, node, count; |
| 573 | register void *addr, *base, *initfunc; |
| 574 | |
| 575 | __asm__ __volatile__( |
| 576 | " .set push \n" |
| 577 | " .set noreorder \n" |
| 578 | " li %[addr], 0x80000000 \n" /* KSEG0 */ |
| 579 | "1: cache 0, 0(%[addr]) \n" /* flush L1 ICache */ |
| 580 | " cache 0, 1(%[addr]) \n" |
| 581 | " cache 0, 2(%[addr]) \n" |
| 582 | " cache 0, 3(%[addr]) \n" |
| 583 | " cache 1, 0(%[addr]) \n" /* flush L1 DCache */ |
| 584 | " cache 1, 1(%[addr]) \n" |
| 585 | " cache 1, 2(%[addr]) \n" |
| 586 | " cache 1, 3(%[addr]) \n" |
| 587 | " addiu %[sets], %[sets], -1 \n" |
| 588 | " bnez %[sets], 1b \n" |
| 589 | " addiu %[addr], %[addr], 0x20 \n" |
| 590 | " li %[val], 0x7 \n" /* *state_addr = CPU_DEAD; */ |
| 591 | " sw %[val], (%[state_addr]) \n" |
| 592 | " sync \n" |
| 593 | " cache 21, (%[state_addr]) \n" /* flush entry of *state_addr */ |
| 594 | " .set pop \n" |
| 595 | : [addr] "=&r" (addr), [val] "=&r" (val) |
| 596 | : [state_addr] "r" (state_addr), |
| 597 | [sets] "r" (cpu_data[smp_processor_id()].dcache.sets)); |
| 598 | |
| 599 | __asm__ __volatile__( |
| 600 | " .set push \n" |
| 601 | " .set noreorder \n" |
| 602 | " .set mips64 \n" |
| 603 | " mfc0 %[cpuid], $15, 1 \n" |
| 604 | " andi %[cpuid], 0x3ff \n" |
| 605 | " dli %[base], 0x900000003ff01000 \n" |
| 606 | " andi %[core], %[cpuid], 0x3 \n" |
| 607 | " sll %[core], 8 \n" /* get core id */ |
| 608 | " or %[base], %[base], %[core] \n" |
| 609 | " andi %[node], %[cpuid], 0xc \n" |
| 610 | " dsll %[node], 42 \n" /* get node id */ |
| 611 | " or %[base], %[base], %[node] \n" |
| 612 | " dsrl %[node], 30 \n" /* 15:14 */ |
| 613 | " or %[base], %[base], %[node] \n" |
| 614 | "1: li %[count], 0x100 \n" /* wait for init loop */ |
| 615 | "2: bnez %[count], 2b \n" /* limit mailbox access */ |
| 616 | " addiu %[count], -1 \n" |
| 617 | " ld %[initfunc], 0x20(%[base]) \n" /* get PC via mailbox */ |
| 618 | " beqz %[initfunc], 1b \n" |
| 619 | " nop \n" |
| 620 | " ld $sp, 0x28(%[base]) \n" /* get SP via mailbox */ |
| 621 | " ld $gp, 0x30(%[base]) \n" /* get GP via mailbox */ |
| 622 | " ld $a1, 0x38(%[base]) \n" |
| 623 | " jr %[initfunc] \n" /* jump to initial PC */ |
| 624 | " nop \n" |
| 625 | " .set pop \n" |
| 626 | : [core] "=&r" (core), [node] "=&r" (node), |
| 627 | [base] "=&r" (base), [cpuid] "=&r" (cpuid), |
| 628 | [count] "=&r" (count), [initfunc] "=&r" (initfunc) |
| 629 | : /* No Input */ |
| 630 | : "a1"); |
| 631 | } |
| 632 | |
| 633 | static void loongson3_type3_play_dead(int *state_addr) |
Huacai Chen | b2edcfc | 2016-03-03 09:45:09 +0800 | [diff] [blame] | 634 | { |
| 635 | register int val; |
| 636 | register long cpuid, core, node, count; |
| 637 | register void *addr, *base, *initfunc; |
| 638 | |
| 639 | __asm__ __volatile__( |
| 640 | " .set push \n" |
| 641 | " .set noreorder \n" |
| 642 | " li %[addr], 0x80000000 \n" /* KSEG0 */ |
| 643 | "1: cache 0, 0(%[addr]) \n" /* flush L1 ICache */ |
| 644 | " cache 0, 1(%[addr]) \n" |
| 645 | " cache 0, 2(%[addr]) \n" |
| 646 | " cache 0, 3(%[addr]) \n" |
| 647 | " cache 1, 0(%[addr]) \n" /* flush L1 DCache */ |
| 648 | " cache 1, 1(%[addr]) \n" |
| 649 | " cache 1, 2(%[addr]) \n" |
| 650 | " cache 1, 3(%[addr]) \n" |
| 651 | " addiu %[sets], %[sets], -1 \n" |
| 652 | " bnez %[sets], 1b \n" |
| 653 | " addiu %[addr], %[addr], 0x40 \n" |
| 654 | " li %[addr], 0x80000000 \n" /* KSEG0 */ |
| 655 | "2: cache 2, 0(%[addr]) \n" /* flush L1 VCache */ |
| 656 | " cache 2, 1(%[addr]) \n" |
| 657 | " cache 2, 2(%[addr]) \n" |
| 658 | " cache 2, 3(%[addr]) \n" |
| 659 | " cache 2, 4(%[addr]) \n" |
| 660 | " cache 2, 5(%[addr]) \n" |
| 661 | " cache 2, 6(%[addr]) \n" |
| 662 | " cache 2, 7(%[addr]) \n" |
| 663 | " cache 2, 8(%[addr]) \n" |
| 664 | " cache 2, 9(%[addr]) \n" |
| 665 | " cache 2, 10(%[addr]) \n" |
| 666 | " cache 2, 11(%[addr]) \n" |
| 667 | " cache 2, 12(%[addr]) \n" |
| 668 | " cache 2, 13(%[addr]) \n" |
| 669 | " cache 2, 14(%[addr]) \n" |
| 670 | " cache 2, 15(%[addr]) \n" |
| 671 | " addiu %[vsets], %[vsets], -1 \n" |
| 672 | " bnez %[vsets], 2b \n" |
| 673 | " addiu %[addr], %[addr], 0x40 \n" |
| 674 | " li %[val], 0x7 \n" /* *state_addr = CPU_DEAD; */ |
| 675 | " sw %[val], (%[state_addr]) \n" |
| 676 | " sync \n" |
| 677 | " cache 21, (%[state_addr]) \n" /* flush entry of *state_addr */ |
| 678 | " .set pop \n" |
| 679 | : [addr] "=&r" (addr), [val] "=&r" (val) |
| 680 | : [state_addr] "r" (state_addr), |
| 681 | [sets] "r" (cpu_data[smp_processor_id()].dcache.sets), |
| 682 | [vsets] "r" (cpu_data[smp_processor_id()].vcache.sets)); |
| 683 | |
| 684 | __asm__ __volatile__( |
| 685 | " .set push \n" |
| 686 | " .set noreorder \n" |
| 687 | " .set mips64 \n" |
| 688 | " mfc0 %[cpuid], $15, 1 \n" |
| 689 | " andi %[cpuid], 0x3ff \n" |
| 690 | " dli %[base], 0x900000003ff01000 \n" |
| 691 | " andi %[core], %[cpuid], 0x3 \n" |
| 692 | " sll %[core], 8 \n" /* get core id */ |
| 693 | " or %[base], %[base], %[core] \n" |
| 694 | " andi %[node], %[cpuid], 0xc \n" |
| 695 | " dsll %[node], 42 \n" /* get node id */ |
| 696 | " or %[base], %[base], %[node] \n" |
| 697 | "1: li %[count], 0x100 \n" /* wait for init loop */ |
| 698 | "2: bnez %[count], 2b \n" /* limit mailbox access */ |
| 699 | " addiu %[count], -1 \n" |
| 700 | " ld %[initfunc], 0x20(%[base]) \n" /* get PC via mailbox */ |
| 701 | " beqz %[initfunc], 1b \n" |
| 702 | " nop \n" |
| 703 | " ld $sp, 0x28(%[base]) \n" /* get SP via mailbox */ |
| 704 | " ld $gp, 0x30(%[base]) \n" /* get GP via mailbox */ |
| 705 | " ld $a1, 0x38(%[base]) \n" |
| 706 | " jr %[initfunc] \n" /* jump to initial PC */ |
| 707 | " nop \n" |
| 708 | " .set pop \n" |
| 709 | : [core] "=&r" (core), [node] "=&r" (node), |
| 710 | [base] "=&r" (base), [cpuid] "=&r" (cpuid), |
| 711 | [count] "=&r" (count), [initfunc] "=&r" (initfunc) |
| 712 | : /* No Input */ |
| 713 | : "a1"); |
| 714 | } |
| 715 | |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 716 | void play_dead(void) |
| 717 | { |
Huacai Chen | 7507445 | 2019-09-21 21:50:27 +0800 | [diff] [blame] | 718 | int prid_imp, prid_rev, *state_addr; |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 719 | unsigned int cpu = smp_processor_id(); |
| 720 | void (*play_dead_at_ckseg1)(int *); |
| 721 | |
| 722 | idle_task_exit(); |
Huacai Chen | 7507445 | 2019-09-21 21:50:27 +0800 | [diff] [blame] | 723 | |
| 724 | prid_imp = read_c0_prid() & PRID_IMP_MASK; |
| 725 | prid_rev = read_c0_prid() & PRID_REV_MASK; |
| 726 | |
| 727 | if (prid_imp == PRID_IMP_LOONGSON_64G) { |
| 728 | play_dead_at_ckseg1 = |
| 729 | (void *)CKSEG1ADDR((unsigned long)loongson3_type3_play_dead); |
| 730 | goto out; |
| 731 | } |
| 732 | |
| 733 | switch (prid_rev) { |
Huacai Chen | b2edcfc | 2016-03-03 09:45:09 +0800 | [diff] [blame] | 734 | case PRID_REV_LOONGSON3A_R1: |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 735 | default: |
| 736 | play_dead_at_ckseg1 = |
Huacai Chen | 7507445 | 2019-09-21 21:50:27 +0800 | [diff] [blame] | 737 | (void *)CKSEG1ADDR((unsigned long)loongson3_type1_play_dead); |
| 738 | break; |
| 739 | case PRID_REV_LOONGSON3B_R1: |
| 740 | case PRID_REV_LOONGSON3B_R2: |
| 741 | play_dead_at_ckseg1 = |
| 742 | (void *)CKSEG1ADDR((unsigned long)loongson3_type2_play_dead); |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 743 | break; |
Huacai Chen | f3ade25 | 2018-11-15 15:53:52 +0800 | [diff] [blame] | 744 | case PRID_REV_LOONGSON3A_R2_0: |
| 745 | case PRID_REV_LOONGSON3A_R2_1: |
Huacai Chen | 7cff3f1 | 2018-04-28 11:21:25 +0800 | [diff] [blame] | 746 | case PRID_REV_LOONGSON3A_R3_0: |
| 747 | case PRID_REV_LOONGSON3A_R3_1: |
Huacai Chen | b2edcfc | 2016-03-03 09:45:09 +0800 | [diff] [blame] | 748 | play_dead_at_ckseg1 = |
Huacai Chen | 7507445 | 2019-09-21 21:50:27 +0800 | [diff] [blame] | 749 | (void *)CKSEG1ADDR((unsigned long)loongson3_type3_play_dead); |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 750 | break; |
| 751 | } |
Huacai Chen | 7507445 | 2019-09-21 21:50:27 +0800 | [diff] [blame] | 752 | |
| 753 | out: |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 754 | state_addr = &per_cpu(cpu_state, cpu); |
| 755 | mb(); |
| 756 | play_dead_at_ckseg1(state_addr); |
| 757 | } |
| 758 | |
Sebastian Andrzej Siewior | e476d31 | 2016-09-06 19:04:52 +0200 | [diff] [blame] | 759 | static int loongson3_disable_clock(unsigned int cpu) |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 760 | { |
Paul Burton | f875a832 | 2017-08-12 19:49:35 -0700 | [diff] [blame] | 761 | uint64_t core_id = cpu_core(&cpu_data[cpu]); |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 762 | uint64_t package_id = cpu_data[cpu].package; |
| 763 | |
Huacai Chen | b2edcfc | 2016-03-03 09:45:09 +0800 | [diff] [blame] | 764 | if ((read_c0_prid() & PRID_REV_MASK) == PRID_REV_LOONGSON3A_R1) { |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 765 | LOONGSON_CHIPCFG(package_id) &= ~(1 << (12 + core_id)); |
Huacai Chen | b2edcfc | 2016-03-03 09:45:09 +0800 | [diff] [blame] | 766 | } else { |
Huacai Chen | 3adeb25 | 2014-11-04 14:13:27 +0800 | [diff] [blame] | 767 | if (!(loongson_sysconf.workarounds & WORKAROUND_CPUHOTPLUG)) |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 768 | LOONGSON_FREQCTRL(package_id) &= ~(1 << (core_id * 4 + 3)); |
| 769 | } |
Sebastian Andrzej Siewior | e476d31 | 2016-09-06 19:04:52 +0200 | [diff] [blame] | 770 | return 0; |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 771 | } |
| 772 | |
Sebastian Andrzej Siewior | e476d31 | 2016-09-06 19:04:52 +0200 | [diff] [blame] | 773 | static int loongson3_enable_clock(unsigned int cpu) |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 774 | { |
Paul Burton | f875a832 | 2017-08-12 19:49:35 -0700 | [diff] [blame] | 775 | uint64_t core_id = cpu_core(&cpu_data[cpu]); |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 776 | uint64_t package_id = cpu_data[cpu].package; |
| 777 | |
Huacai Chen | b2edcfc | 2016-03-03 09:45:09 +0800 | [diff] [blame] | 778 | if ((read_c0_prid() & PRID_REV_MASK) == PRID_REV_LOONGSON3A_R1) { |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 779 | LOONGSON_CHIPCFG(package_id) |= 1 << (12 + core_id); |
Huacai Chen | b2edcfc | 2016-03-03 09:45:09 +0800 | [diff] [blame] | 780 | } else { |
Huacai Chen | 3adeb25 | 2014-11-04 14:13:27 +0800 | [diff] [blame] | 781 | if (!(loongson_sysconf.workarounds & WORKAROUND_CPUHOTPLUG)) |
Huacai Chen | e7841be | 2014-06-26 11:41:30 +0800 | [diff] [blame] | 782 | LOONGSON_FREQCTRL(package_id) |= 1 << (core_id * 4 + 3); |
| 783 | } |
Sebastian Andrzej Siewior | e476d31 | 2016-09-06 19:04:52 +0200 | [diff] [blame] | 784 | return 0; |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 785 | } |
| 786 | |
| 787 | static int register_loongson3_notifier(void) |
| 788 | { |
Sebastian Andrzej Siewior | e476d31 | 2016-09-06 19:04:52 +0200 | [diff] [blame] | 789 | return cpuhp_setup_state_nocalls(CPUHP_MIPS_SOC_PREPARE, |
| 790 | "mips/loongson:prepare", |
| 791 | loongson3_enable_clock, |
| 792 | loongson3_disable_clock); |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 793 | } |
| 794 | early_initcall(register_loongson3_notifier); |
| 795 | |
| 796 | #endif |
| 797 | |
Matt Redfearn | ff2c825 | 2017-07-19 09:21:03 +0100 | [diff] [blame] | 798 | const struct plat_smp_ops loongson3_smp_ops = { |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 799 | .send_ipi_single = loongson3_send_ipi_single, |
| 800 | .send_ipi_mask = loongson3_send_ipi_mask, |
| 801 | .init_secondary = loongson3_init_secondary, |
| 802 | .smp_finish = loongson3_smp_finish, |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 803 | .boot_secondary = loongson3_boot_secondary, |
| 804 | .smp_setup = loongson3_smp_setup, |
| 805 | .prepare_cpus = loongson3_prepare_cpus, |
Huacai Chen | c4a987d | 2014-03-21 18:44:09 +0800 | [diff] [blame] | 806 | #ifdef CONFIG_HOTPLUG_CPU |
| 807 | .cpu_disable = loongson3_cpu_disable, |
| 808 | .cpu_die = loongson3_cpu_die, |
| 809 | #endif |
Dengcheng Zhu | 62cac48 | 2018-09-11 14:49:21 -0700 | [diff] [blame] | 810 | #ifdef CONFIG_KEXEC |
| 811 | .kexec_nonboot_cpu = kexec_nonboot_cpu_jump, |
| 812 | #endif |
Huacai Chen | 300459d | 2014-03-21 18:44:08 +0800 | [diff] [blame] | 813 | }; |