| 1 | /* |
| 2 | * Written by: Garry Forsgren, Unisys Corporation |
| 3 | * Natalie Protasevich, Unisys Corporation |
| 4 | * This file contains the code to configure and interface |
| 5 | * with Unisys ES7000 series hardware system manager. |
| 6 | * |
| 7 | * Copyright (c) 2003 Unisys Corporation. All Rights Reserved. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of version 2 of the GNU General Public License as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * This program is distributed in the hope that it would be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write the Free Software Foundation, Inc., 59 |
| 19 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| 20 | * |
| 21 | * Contact information: Unisys Corporation, Township Line & Union Meeting |
| 22 | * Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or: |
| 23 | * |
| 24 | * http://www.unisys.com |
| 25 | */ |
| 26 | |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/smp.h> |
| 31 | #include <linux/string.h> |
| 32 | #include <linux/spinlock.h> |
| 33 | #include <linux/errno.h> |
| 34 | #include <linux/notifier.h> |
| 35 | #include <linux/reboot.h> |
| 36 | #include <linux/init.h> |
| 37 | #include <linux/acpi.h> |
| 38 | #include <asm/io.h> |
| 39 | #include <asm/nmi.h> |
| 40 | #include <asm/smp.h> |
| 41 | #include <asm/apicdef.h> |
| 42 | #include "es7000.h" |
| 43 | |
| 44 | /* |
| 45 | * ES7000 Globals |
| 46 | */ |
| 47 | |
| 48 | volatile unsigned long *psai = NULL; |
| 49 | struct mip_reg *mip_reg; |
| 50 | struct mip_reg *host_reg; |
| 51 | int mip_port; |
| 52 | unsigned long mip_addr, host_addr; |
| 53 | |
| 54 | #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI) |
| 55 | |
| 56 | /* |
| 57 | * GSI override for ES7000 platforms. |
| 58 | */ |
| 59 | |
| 60 | static unsigned int base; |
| 61 | |
| 62 | static int |
| 63 | es7000_rename_gsi(int ioapic, int gsi) |
| 64 | { |
| 65 | if (es7000_plat == ES7000_ZORRO) |
| 66 | return gsi; |
| 67 | |
| 68 | if (!base) { |
| 69 | int i; |
| 70 | for (i = 0; i < nr_ioapics; i++) |
| 71 | base += nr_ioapic_registers[i]; |
| 72 | } |
| 73 | |
| 74 | if (!ioapic && (gsi < 16)) |
| 75 | gsi += base; |
| 76 | return gsi; |
| 77 | } |
| 78 | |
| 79 | #endif /* (CONFIG_X86_IO_APIC) && (CONFIG_ACPI) */ |
| 80 | |
| 81 | void __init |
| 82 | setup_unisys(void) |
| 83 | { |
| 84 | /* |
| 85 | * Determine the generation of the ES7000 currently running. |
| 86 | * |
| 87 | * es7000_plat = 1 if the machine is a 5xx ES7000 box |
| 88 | * es7000_plat = 2 if the machine is a x86_64 ES7000 box |
| 89 | * |
| 90 | */ |
| 91 | if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2)) |
| 92 | es7000_plat = ES7000_ZORRO; |
| 93 | else |
| 94 | es7000_plat = ES7000_CLASSIC; |
| 95 | ioapic_renumber_irq = es7000_rename_gsi; |
| 96 | } |
| 97 | |
| 98 | /* |
| 99 | * Parse the OEM Table |
| 100 | */ |
| 101 | |
| 102 | int __init |
| 103 | parse_unisys_oem (char *oemptr) |
| 104 | { |
| 105 | int i; |
| 106 | int success = 0; |
| 107 | unsigned char type, size; |
| 108 | unsigned long val; |
| 109 | char *tp = NULL; |
| 110 | struct psai *psaip = NULL; |
| 111 | struct mip_reg_info *mi; |
| 112 | struct mip_reg *host, *mip; |
| 113 | |
| 114 | tp = oemptr; |
| 115 | |
| 116 | tp += 8; |
| 117 | |
| 118 | for (i=0; i <= 6; i++) { |
| 119 | type = *tp++; |
| 120 | size = *tp++; |
| 121 | tp -= 2; |
| 122 | switch (type) { |
| 123 | case MIP_REG: |
| 124 | mi = (struct mip_reg_info *)tp; |
| 125 | val = MIP_RD_LO(mi->host_reg); |
| 126 | host_addr = val; |
| 127 | host = (struct mip_reg *)val; |
| 128 | host_reg = __va(host); |
| 129 | val = MIP_RD_LO(mi->mip_reg); |
| 130 | mip_port = MIP_PORT(mi->mip_info); |
| 131 | mip_addr = val; |
| 132 | mip = (struct mip_reg *)val; |
| 133 | mip_reg = __va(mip); |
| 134 | Dprintk("es7000_mipcfg: host_reg = 0x%lx \n", |
| 135 | (unsigned long)host_reg); |
| 136 | Dprintk("es7000_mipcfg: mip_reg = 0x%lx \n", |
| 137 | (unsigned long)mip_reg); |
| 138 | success++; |
| 139 | break; |
| 140 | case MIP_PSAI_REG: |
| 141 | psaip = (struct psai *)tp; |
| 142 | if (tp != NULL) { |
| 143 | if (psaip->addr) |
| 144 | psai = __va(psaip->addr); |
| 145 | else |
| 146 | psai = NULL; |
| 147 | success++; |
| 148 | } |
| 149 | break; |
| 150 | default: |
| 151 | break; |
| 152 | } |
| 153 | tp += size; |
| 154 | } |
| 155 | |
| 156 | if (success < 2) { |
| 157 | es7000_plat = NON_UNISYS; |
| 158 | } else |
| 159 | setup_unisys(); |
| 160 | return es7000_plat; |
| 161 | } |
| 162 | |
| 163 | int __init |
| 164 | find_unisys_acpi_oem_table(unsigned long *oem_addr) |
| 165 | { |
| 166 | struct acpi_table_rsdp *rsdp = NULL; |
| 167 | unsigned long rsdp_phys = 0; |
| 168 | struct acpi_table_header *header = NULL; |
| 169 | int i; |
| 170 | struct acpi_table_sdt sdt; |
| 171 | |
| 172 | rsdp_phys = acpi_find_rsdp(); |
| 173 | rsdp = __va(rsdp_phys); |
| 174 | if (rsdp->rsdt_address) { |
| 175 | struct acpi_table_rsdt *mapped_rsdt = NULL; |
| 176 | sdt.pa = rsdp->rsdt_address; |
| 177 | |
| 178 | header = (struct acpi_table_header *) |
| 179 | __acpi_map_table(sdt.pa, sizeof(struct acpi_table_header)); |
| 180 | if (!header) |
| 181 | return -ENODEV; |
| 182 | |
| 183 | sdt.count = (header->length - sizeof(struct acpi_table_header)) >> 3; |
| 184 | mapped_rsdt = (struct acpi_table_rsdt *) |
| 185 | __acpi_map_table(sdt.pa, header->length); |
| 186 | if (!mapped_rsdt) |
| 187 | return -ENODEV; |
| 188 | |
| 189 | header = &mapped_rsdt->header; |
| 190 | |
| 191 | for (i = 0; i < sdt.count; i++) |
| 192 | sdt.entry[i].pa = (unsigned long) mapped_rsdt->entry[i]; |
| 193 | }; |
| 194 | for (i = 0; i < sdt.count; i++) { |
| 195 | |
| 196 | header = (struct acpi_table_header *) |
| 197 | __acpi_map_table(sdt.entry[i].pa, |
| 198 | sizeof(struct acpi_table_header)); |
| 199 | if (!header) |
| 200 | continue; |
| 201 | if (!strncmp((char *) &header->signature, "OEM1", 4)) { |
| 202 | if (!strncmp((char *) &header->oem_id, "UNISYS", 6)) { |
| 203 | void *addr; |
| 204 | struct oem_table *t; |
| 205 | acpi_table_print(header, sdt.entry[i].pa); |
| 206 | t = (struct oem_table *) __acpi_map_table(sdt.entry[i].pa, header->length); |
| 207 | addr = (void *) __acpi_map_table(t->OEMTableAddr, t->OEMTableSize); |
| 208 | *oem_addr = (unsigned long) addr; |
| 209 | return 0; |
| 210 | } |
| 211 | } |
| 212 | } |
| 213 | return -1; |
| 214 | } |
| 215 | |
| 216 | static void |
| 217 | es7000_spin(int n) |
| 218 | { |
| 219 | int i = 0; |
| 220 | |
| 221 | while (i++ < n) |
| 222 | rep_nop(); |
| 223 | } |
| 224 | |
| 225 | static int __init |
| 226 | es7000_mip_write(struct mip_reg *mip_reg) |
| 227 | { |
| 228 | int status = 0; |
| 229 | int spin; |
| 230 | |
| 231 | spin = MIP_SPIN; |
| 232 | while (((unsigned long long)host_reg->off_38 & |
| 233 | (unsigned long long)MIP_VALID) != 0) { |
| 234 | if (--spin <= 0) { |
| 235 | printk("es7000_mip_write: Timeout waiting for Host Valid Flag"); |
| 236 | return -1; |
| 237 | } |
| 238 | es7000_spin(MIP_SPIN); |
| 239 | } |
| 240 | |
| 241 | memcpy(host_reg, mip_reg, sizeof(struct mip_reg)); |
| 242 | outb(1, mip_port); |
| 243 | |
| 244 | spin = MIP_SPIN; |
| 245 | |
| 246 | while (((unsigned long long)mip_reg->off_38 & |
| 247 | (unsigned long long)MIP_VALID) == 0) { |
| 248 | if (--spin <= 0) { |
| 249 | printk("es7000_mip_write: Timeout waiting for MIP Valid Flag"); |
| 250 | return -1; |
| 251 | } |
| 252 | es7000_spin(MIP_SPIN); |
| 253 | } |
| 254 | |
| 255 | status = ((unsigned long long)mip_reg->off_0 & |
| 256 | (unsigned long long)0xffff0000000000ULL) >> 48; |
| 257 | mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 & |
| 258 | (unsigned long long)~MIP_VALID); |
| 259 | return status; |
| 260 | } |
| 261 | |
| 262 | int |
| 263 | es7000_start_cpu(int cpu, unsigned long eip) |
| 264 | { |
| 265 | unsigned long vect = 0, psaival = 0; |
| 266 | |
| 267 | if (psai == NULL) |
| 268 | return -1; |
| 269 | |
| 270 | vect = ((unsigned long)__pa(eip)/0x1000) << 16; |
| 271 | psaival = (0x1000000 | vect | cpu); |
| 272 | |
| 273 | while (*psai & 0x1000000) |
| 274 | ; |
| 275 | |
| 276 | *psai = psaival; |
| 277 | |
| 278 | return 0; |
| 279 | |
| 280 | } |
| 281 | |
| 282 | int |
| 283 | es7000_stop_cpu(int cpu) |
| 284 | { |
| 285 | int startup; |
| 286 | |
| 287 | if (psai == NULL) |
| 288 | return -1; |
| 289 | |
| 290 | startup= (0x1000000 | cpu); |
| 291 | |
| 292 | while ((*psai & 0xff00ffff) != startup) |
| 293 | ; |
| 294 | |
| 295 | startup = (*psai & 0xff0000) >> 16; |
| 296 | *psai &= 0xffffff; |
| 297 | |
| 298 | return 0; |
| 299 | |
| 300 | } |
| 301 | |
| 302 | void __init |
| 303 | es7000_sw_apic() |
| 304 | { |
| 305 | if (es7000_plat) { |
| 306 | int mip_status; |
| 307 | struct mip_reg es7000_mip_reg; |
| 308 | |
| 309 | printk("ES7000: Enabling APIC mode.\n"); |
| 310 | memset(&es7000_mip_reg, 0, sizeof(struct mip_reg)); |
| 311 | es7000_mip_reg.off_0 = MIP_SW_APIC; |
| 312 | es7000_mip_reg.off_38 = (MIP_VALID); |
| 313 | while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0) |
| 314 | printk("es7000_sw_apic: command failed, status = %x\n", |
| 315 | mip_status); |
| 316 | return; |
| 317 | } |
| 318 | } |