Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Paul Mackerras | 033ef33 | 2005-10-26 17:05:24 +1000 | [diff] [blame] | 2 | * 64-bit pSeries and RS/6000 setup code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 1995 Linus Torvalds |
| 5 | * Adapted from 'alpha' version by Gary Thomas |
| 6 | * Modified by Cort Dougan (cort@cs.nmt.edu) |
| 7 | * Modified by PPC64 Team, IBM Corp |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation; either version |
| 12 | * 2 of the License, or (at your option) any later version. |
| 13 | */ |
| 14 | |
| 15 | /* |
| 16 | * bootup setup stuff.. |
| 17 | */ |
| 18 | |
| 19 | #undef DEBUG |
| 20 | |
| 21 | #include <linux/config.h> |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 22 | #include <linux/cpu.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/errno.h> |
| 24 | #include <linux/sched.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/mm.h> |
| 27 | #include <linux/stddef.h> |
| 28 | #include <linux/unistd.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/user.h> |
| 31 | #include <linux/a.out.h> |
| 32 | #include <linux/tty.h> |
| 33 | #include <linux/major.h> |
| 34 | #include <linux/interrupt.h> |
| 35 | #include <linux/reboot.h> |
| 36 | #include <linux/init.h> |
| 37 | #include <linux/ioport.h> |
| 38 | #include <linux/console.h> |
| 39 | #include <linux/pci.h> |
Olaf Hering | cebb2b1 | 2005-07-10 19:35:15 +0000 | [diff] [blame] | 40 | #include <linux/utsname.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/adb.h> |
| 42 | #include <linux/module.h> |
| 43 | #include <linux/delay.h> |
| 44 | #include <linux/irq.h> |
| 45 | #include <linux/seq_file.h> |
| 46 | #include <linux/root_dev.h> |
| 47 | |
| 48 | #include <asm/mmu.h> |
| 49 | #include <asm/processor.h> |
| 50 | #include <asm/io.h> |
| 51 | #include <asm/pgtable.h> |
| 52 | #include <asm/prom.h> |
| 53 | #include <asm/rtas.h> |
| 54 | #include <asm/pci-bridge.h> |
| 55 | #include <asm/iommu.h> |
| 56 | #include <asm/dma.h> |
| 57 | #include <asm/machdep.h> |
| 58 | #include <asm/irq.h> |
Michael Ellerman | 3d1229d | 2005-11-14 23:35:00 +1100 | [diff] [blame] | 59 | #include <asm/kexec.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | #include <asm/time.h> |
| 61 | #include <asm/nvram.h> |
David Gibson | 007e8f5 | 2005-10-28 15:35:50 +1000 | [diff] [blame] | 62 | #include "xics.h" |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 63 | #include <asm/pmc.h> |
Stephen Rothwell | bbeb3f4 | 2005-09-27 13:51:59 +1000 | [diff] [blame] | 64 | #include <asm/mpic.h> |
Stephen Rothwell | d387899 | 2005-09-28 02:50:25 +1000 | [diff] [blame] | 65 | #include <asm/ppc-pci.h> |
Paul Mackerras | 69a80d3 | 2005-10-10 22:03:41 +1000 | [diff] [blame] | 66 | #include <asm/i8259.h> |
| 67 | #include <asm/udbg.h> |
Paul Mackerras | 2249ca9 | 2005-11-07 13:18:13 +1100 | [diff] [blame] | 68 | #include <asm/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
Michael Ellerman | a121872 | 2005-11-03 15:33:31 +1100 | [diff] [blame] | 70 | #include "plpar_wrappers.h" |
Arnd Bergmann | c902be7 | 2006-01-04 19:55:53 +0000 | [diff] [blame] | 71 | #include "ras.h" |
Michael Ellerman | 1965746 | 2006-02-10 15:47:36 +1100 | [diff] [blame] | 72 | #include "firmware.h" |
Michael Ellerman | a121872 | 2005-11-03 15:33:31 +1100 | [diff] [blame] | 73 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | #ifdef DEBUG |
| 75 | #define DBG(fmt...) udbg_printf(fmt) |
| 76 | #else |
| 77 | #define DBG(fmt...) |
| 78 | #endif |
| 79 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | extern void find_udbg_vterm(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
| 82 | int fwnmi_active; /* TRUE if an FWNMI handler is present */ |
| 83 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 84 | static void pseries_shared_idle_sleep(void); |
| 85 | static void pseries_dedicated_idle_sleep(void); |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 86 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | struct mpic *pSeries_mpic; |
| 88 | |
Arnd Bergmann | 8446196 | 2006-01-11 00:00:02 +0000 | [diff] [blame] | 89 | static void pSeries_show_cpuinfo(struct seq_file *m) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | { |
| 91 | struct device_node *root; |
| 92 | const char *model = ""; |
| 93 | |
| 94 | root = of_find_node_by_path("/"); |
| 95 | if (root) |
| 96 | model = get_property(root, "model", NULL); |
| 97 | seq_printf(m, "machine\t\t: CHRP %s\n", model); |
| 98 | of_node_put(root); |
| 99 | } |
| 100 | |
| 101 | /* Initialize firmware assisted non-maskable interrupts if |
| 102 | * the firmware supports this feature. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | */ |
| 104 | static void __init fwnmi_init(void) |
| 105 | { |
Michael Ellerman | 8c4f1f2 | 2005-12-04 18:39:33 +1100 | [diff] [blame] | 106 | unsigned long system_reset_addr, machine_check_addr; |
| 107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | int ibm_nmi_register = rtas_token("ibm,nmi-register"); |
| 109 | if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE) |
| 110 | return; |
Michael Ellerman | 8c4f1f2 | 2005-12-04 18:39:33 +1100 | [diff] [blame] | 111 | |
| 112 | /* If the kernel's not linked at zero we point the firmware at low |
| 113 | * addresses anyway, and use a trampoline to get to the real code. */ |
| 114 | system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START; |
| 115 | machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START; |
| 116 | |
| 117 | if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr, |
| 118 | machine_check_addr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | fwnmi_active = 1; |
| 120 | } |
| 121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | static void __init pSeries_init_mpic(void) |
| 123 | { |
| 124 | unsigned int *addrp; |
| 125 | struct device_node *np; |
Paul Mackerras | f9bd170 | 2005-10-26 16:47:42 +1000 | [diff] [blame] | 126 | unsigned long intack = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
| 128 | /* All ISUs are setup, complete initialization */ |
| 129 | mpic_init(pSeries_mpic); |
| 130 | |
| 131 | /* Check what kind of cascade ACK we have */ |
| 132 | if (!(np = of_find_node_by_name(NULL, "pci")) |
| 133 | || !(addrp = (unsigned int *) |
| 134 | get_property(np, "8259-interrupt-acknowledge", NULL))) |
| 135 | printk(KERN_ERR "Cannot find pci to get ack address\n"); |
| 136 | else |
Paul Mackerras | f9bd170 | 2005-10-26 16:47:42 +1000 | [diff] [blame] | 137 | intack = addrp[prom_n_addr_cells(np)-1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | of_node_put(np); |
| 139 | |
| 140 | /* Setup the legacy interrupts & controller */ |
Paul Mackerras | f9bd170 | 2005-10-26 16:47:42 +1000 | [diff] [blame] | 141 | i8259_init(intack, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
| 143 | /* Hook cascade to mpic */ |
Paul Mackerras | f9bd170 | 2005-10-26 16:47:42 +1000 | [diff] [blame] | 144 | mpic_setup_cascade(NUM_ISA_INTERRUPTS, i8259_irq_cascade, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | static void __init pSeries_setup_mpic(void) |
| 148 | { |
| 149 | unsigned int *opprop; |
| 150 | unsigned long openpic_addr = 0; |
| 151 | unsigned char senses[NR_IRQS - NUM_ISA_INTERRUPTS]; |
| 152 | struct device_node *root; |
| 153 | int irq_count; |
| 154 | |
| 155 | /* Find the Open PIC if present */ |
| 156 | root = of_find_node_by_path("/"); |
| 157 | opprop = (unsigned int *) get_property(root, "platform-open-pic", NULL); |
| 158 | if (opprop != 0) { |
| 159 | int n = prom_n_addr_cells(root); |
| 160 | |
| 161 | for (openpic_addr = 0; n > 0; --n) |
| 162 | openpic_addr = (openpic_addr << 32) + *opprop++; |
| 163 | printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr); |
| 164 | } |
| 165 | of_node_put(root); |
| 166 | |
| 167 | BUG_ON(openpic_addr == 0); |
| 168 | |
| 169 | /* Get the sense values from OF */ |
| 170 | prom_get_irq_senses(senses, NUM_ISA_INTERRUPTS, NR_IRQS); |
| 171 | |
| 172 | /* Setup the openpic driver */ |
| 173 | irq_count = NR_IRQS - NUM_ISA_INTERRUPTS - 4; /* leave room for IPIs */ |
| 174 | pSeries_mpic = mpic_alloc(openpic_addr, MPIC_PRIMARY, |
| 175 | 16, 16, irq_count, /* isu size, irq offset, irq count */ |
| 176 | NR_IRQS - 4, /* ipi offset */ |
| 177 | senses, irq_count, /* sense & sense size */ |
| 178 | " MPIC "); |
| 179 | } |
| 180 | |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 181 | static void pseries_lpar_enable_pmcs(void) |
| 182 | { |
| 183 | unsigned long set, reset; |
| 184 | |
| 185 | power4_enable_pmcs(); |
| 186 | |
| 187 | set = 1UL << 63; |
| 188 | reset = 0; |
| 189 | plpar_hcall_norets(H_PERFMON, set, reset); |
| 190 | |
| 191 | /* instruct hypervisor to maintain PMCs */ |
| 192 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) |
David Gibson | 3356bb9f7 | 2006-01-13 10:26:42 +1100 | [diff] [blame] | 193 | get_lppaca()->pmcregs_in_use = 1; |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 194 | } |
| 195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | static void __init pSeries_setup_arch(void) |
| 197 | { |
| 198 | /* Fixup ppc_md depending on the type of interrupt controller */ |
| 199 | if (ppc64_interrupt_controller == IC_OPEN_PIC) { |
R Sharada | fce0d57 | 2005-06-25 14:58:10 -0700 | [diff] [blame] | 200 | ppc_md.init_IRQ = pSeries_init_mpic; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | ppc_md.get_irq = mpic_get_irq; |
| 202 | /* Allocate the mpic now, so that find_and_init_phbs() can |
| 203 | * fill the ISUs */ |
| 204 | pSeries_setup_mpic(); |
| 205 | } else { |
| 206 | ppc_md.init_IRQ = xics_init_IRQ; |
| 207 | ppc_md.get_irq = xics_get_irq; |
| 208 | } |
| 209 | |
| 210 | #ifdef CONFIG_SMP |
| 211 | smp_init_pSeries(); |
| 212 | #endif |
| 213 | /* openpic global configuration register (64-bit format). */ |
| 214 | /* openpic Interrupt Source Unit pointer (64-bit format). */ |
| 215 | /* python0 facility area (mmio) (64-bit format) REAL address. */ |
| 216 | |
| 217 | /* init to some ~sane value until calibrate_delay() runs */ |
| 218 | loops_per_jiffy = 50000000; |
| 219 | |
| 220 | if (ROOT_DEV == 0) { |
| 221 | printk("No ramdisk, default root is /dev/sda2\n"); |
| 222 | ROOT_DEV = Root_SDA2; |
| 223 | } |
| 224 | |
| 225 | fwnmi_init(); |
| 226 | |
| 227 | /* Find and initialize PCI host bridges */ |
| 228 | init_pci_config_tokens(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | find_and_init_phbs(); |
Paul Mackerras | 0160f53 | 2005-09-13 20:56:20 +1000 | [diff] [blame] | 230 | eeh_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | pSeries_nvram_init(); |
| 233 | |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 234 | /* Choose an idle loop */ |
Stephen Rothwell | 1ababe1 | 2005-08-03 14:35:25 +1000 | [diff] [blame] | 235 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { |
Stephen Rothwell | 8d15a3e | 2005-08-03 14:40:16 +1000 | [diff] [blame] | 236 | vpa_init(boot_cpuid); |
David Gibson | 3356bb9f7 | 2006-01-13 10:26:42 +1100 | [diff] [blame] | 237 | if (get_lppaca()->shared_proc) { |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 238 | printk(KERN_INFO "Using shared processor idle loop\n"); |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 239 | ppc_md.power_save = pseries_shared_idle_sleep; |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 240 | } else { |
| 241 | printk(KERN_INFO "Using dedicated idle loop\n"); |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 242 | ppc_md.power_save = pseries_dedicated_idle_sleep; |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 243 | } |
| 244 | } else { |
| 245 | printk(KERN_INFO "Using default idle loop\n"); |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 246 | } |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 247 | |
Michael Ellerman | 57cfb81 | 2006-03-21 20:45:59 +1100 | [diff] [blame] | 248 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 249 | ppc_md.enable_pmcs = pseries_lpar_enable_pmcs; |
| 250 | else |
| 251 | ppc_md.enable_pmcs = power4_enable_pmcs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | static int __init pSeries_init_panel(void) |
| 255 | { |
| 256 | /* Manually leave the kernel version on the panel. */ |
| 257 | ppc_md.progress("Linux ppc64\n", 0); |
Anton Blanchard | 3de620e | 2006-05-10 13:05:54 +1000 | [diff] [blame] | 258 | ppc_md.progress(system_utsname.release, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
| 260 | return 0; |
| 261 | } |
| 262 | arch_initcall(pSeries_init_panel); |
| 263 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | static void __init pSeries_discover_pic(void) |
| 265 | { |
| 266 | struct device_node *np; |
| 267 | char *typep; |
| 268 | |
| 269 | /* |
| 270 | * Setup interrupt mapping options that are needed for finish_device_tree |
| 271 | * to properly parse the OF interrupt tree & do the virtual irq mapping |
| 272 | */ |
| 273 | __irq_offset_value = NUM_ISA_INTERRUPTS; |
| 274 | ppc64_interrupt_controller = IC_INVALID; |
| 275 | for (np = NULL; (np = of_find_node_by_name(np, "interrupt-controller"));) { |
| 276 | typep = (char *)get_property(np, "compatible", NULL); |
Haren Myneni | 9da5cad | 2005-12-27 15:51:07 -0800 | [diff] [blame] | 277 | if (strstr(typep, "open-pic")) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | ppc64_interrupt_controller = IC_OPEN_PIC; |
Haren Myneni | 9da5cad | 2005-12-27 15:51:07 -0800 | [diff] [blame] | 279 | break; |
| 280 | } else if (strstr(typep, "ppc-xicp")) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | ppc64_interrupt_controller = IC_PPC_XIC; |
Haren Myneni | 9da5cad | 2005-12-27 15:51:07 -0800 | [diff] [blame] | 282 | break; |
| 283 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | } |
Haren Myneni | 9da5cad | 2005-12-27 15:51:07 -0800 | [diff] [blame] | 285 | if (ppc64_interrupt_controller == IC_INVALID) |
| 286 | printk("pSeries_discover_pic: failed to recognize" |
| 287 | " interrupt-controller\n"); |
| 288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | static void pSeries_mach_cpu_die(void) |
| 292 | { |
| 293 | local_irq_disable(); |
| 294 | idle_task_exit(); |
| 295 | /* Some hardware requires clearing the CPPR, while other hardware does not |
| 296 | * it is safe either way |
| 297 | */ |
| 298 | pSeriesLP_cppr_info(0, 0); |
| 299 | rtas_stop_self(); |
| 300 | /* Should never get here... */ |
| 301 | BUG(); |
| 302 | for(;;); |
| 303 | } |
| 304 | |
Michael Ellerman | cab0af9 | 2005-11-03 15:30:49 +1100 | [diff] [blame] | 305 | static int pseries_set_dabr(unsigned long dabr) |
| 306 | { |
Michael Ellerman | 76032de | 2005-11-07 13:12:03 +1100 | [diff] [blame] | 307 | return plpar_hcall_norets(H_SET_DABR, dabr); |
Michael Ellerman | cab0af9 | 2005-11-03 15:30:49 +1100 | [diff] [blame] | 308 | } |
| 309 | |
Michael Ellerman | 76032de | 2005-11-07 13:12:03 +1100 | [diff] [blame] | 310 | static int pseries_set_xdabr(unsigned long dabr) |
| 311 | { |
| 312 | /* We want to catch accesses from kernel and userspace */ |
| 313 | return plpar_hcall_norets(H_SET_XDABR, dabr, |
| 314 | H_DABRX_KERNEL | H_DABRX_USER); |
| 315 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
| 317 | /* |
| 318 | * Early initialization. Relocation is on but do not reference unbolted pages |
| 319 | */ |
| 320 | static void __init pSeries_init_early(void) |
| 321 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | DBG(" -> pSeries_init_early()\n"); |
| 323 | |
| 324 | fw_feature_init(); |
| 325 | |
Michael Ellerman | 57cfb81 | 2006-03-21 20:45:59 +1100 | [diff] [blame] | 326 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | hpte_init_lpar(); |
Michael Ellerman | 41520244 | 2006-03-21 20:45:58 +1100 | [diff] [blame] | 328 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | hpte_init_native(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | |
Michael Ellerman | 57cfb81 | 2006-03-21 20:45:59 +1100 | [diff] [blame] | 331 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | find_udbg_vterm(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
Michael Ellerman | 76032de | 2005-11-07 13:12:03 +1100 | [diff] [blame] | 334 | if (firmware_has_feature(FW_FEATURE_DABR)) |
Michael Ellerman | cab0af9 | 2005-11-03 15:30:49 +1100 | [diff] [blame] | 335 | ppc_md.set_dabr = pseries_set_dabr; |
Michael Ellerman | 76032de | 2005-11-07 13:12:03 +1100 | [diff] [blame] | 336 | else if (firmware_has_feature(FW_FEATURE_XDABR)) |
| 337 | ppc_md.set_dabr = pseries_set_xdabr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
| 339 | iommu_init_early_pSeries(); |
| 340 | |
| 341 | pSeries_discover_pic(); |
| 342 | |
| 343 | DBG(" <- pSeries_init_early()\n"); |
| 344 | } |
| 345 | |
| 346 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | static int pSeries_check_legacy_ioport(unsigned int baseport) |
| 348 | { |
| 349 | struct device_node *np; |
| 350 | |
| 351 | #define I8042_DATA_REG 0x60 |
| 352 | #define FDC_BASE 0x3f0 |
| 353 | |
| 354 | |
| 355 | switch(baseport) { |
| 356 | case I8042_DATA_REG: |
| 357 | np = of_find_node_by_type(NULL, "8042"); |
| 358 | if (np == NULL) |
| 359 | return -ENODEV; |
| 360 | of_node_put(np); |
| 361 | break; |
| 362 | case FDC_BASE: |
| 363 | np = of_find_node_by_type(NULL, "fdc"); |
| 364 | if (np == NULL) |
| 365 | return -ENODEV; |
| 366 | of_node_put(np); |
| 367 | break; |
| 368 | } |
| 369 | return 0; |
| 370 | } |
| 371 | |
| 372 | /* |
| 373 | * Called very early, MMU is off, device-tree isn't unflattened |
| 374 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 376 | static int __init pSeries_probe_hypertas(unsigned long node, |
| 377 | const char *uname, int depth, |
| 378 | void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | { |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 380 | if (depth != 1 || |
| 381 | (strcmp(uname, "rtas") != 0 && strcmp(uname, "rtas@0") != 0)) |
| 382 | return 0; |
| 383 | |
| 384 | if (of_get_flat_dt_prop(node, "ibm,hypertas-functions", NULL) != NULL) |
| 385 | powerpc_firmware_features |= FW_FEATURE_LPAR; |
| 386 | |
| 387 | return 1; |
| 388 | } |
| 389 | |
| 390 | static int __init pSeries_probe(void) |
| 391 | { |
Arnd Bergmann | 133dda1 | 2006-06-07 12:04:18 +1000 | [diff] [blame] | 392 | unsigned long root = of_get_flat_dt_root(); |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 393 | char *dtype = of_get_flat_dt_prop(of_get_flat_dt_root(), |
| 394 | "device_type", NULL); |
| 395 | if (dtype == NULL) |
| 396 | return 0; |
| 397 | if (strcmp(dtype, "chrp")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | return 0; |
| 399 | |
Arnd Bergmann | 133dda1 | 2006-06-07 12:04:18 +1000 | [diff] [blame] | 400 | /* Cell blades firmware claims to be chrp while it's not. Until this |
| 401 | * is fixed, we need to avoid those here. |
| 402 | */ |
| 403 | if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0") || |
| 404 | of_flat_dt_is_compatible(root, "IBM,CBEA")) |
| 405 | return 0; |
| 406 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 407 | DBG("pSeries detected, looking for LPAR capability...\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 409 | /* Now try to figure out if we are running on LPAR */ |
| 410 | of_scan_flat_dt(pSeries_probe_hypertas, NULL); |
| 411 | |
| 412 | DBG("Machine is%s LPAR !\n", |
| 413 | (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not"); |
Michael Ellerman | 57cfb81 | 2006-03-21 20:45:59 +1100 | [diff] [blame] | 414 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | return 1; |
| 416 | } |
| 417 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 418 | |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 419 | DECLARE_PER_CPU(unsigned long, smt_snooze_delay); |
| 420 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 421 | static void pseries_dedicated_idle_sleep(void) |
Paul Mackerras | 143a1de | 2005-10-19 23:11:21 +1000 | [diff] [blame] | 422 | { |
Anton Blanchard | 050a093 | 2005-07-07 17:56:33 -0700 | [diff] [blame] | 423 | unsigned int cpu = smp_processor_id(); |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 424 | unsigned long start_snooze; |
| 425 | unsigned long *smt_snooze_delay = &__get_cpu_var(smt_snooze_delay); |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 426 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 427 | /* |
| 428 | * Indicate to the HV that we are idle. Now would be |
| 429 | * a good time to find other work to dispatch. |
| 430 | */ |
| 431 | get_lppaca()->idle = 1; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 432 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 433 | /* |
| 434 | * We come in with interrupts disabled, and need_resched() |
| 435 | * has been checked recently. If we should poll for a little |
| 436 | * while, do so. |
| 437 | */ |
| 438 | if (*smt_snooze_delay) { |
| 439 | start_snooze = get_tb() + |
| 440 | *smt_snooze_delay * tb_ticks_per_usec; |
| 441 | local_irq_enable(); |
| 442 | set_thread_flag(TIF_POLLING_NRFLAG); |
Anton Blanchard | 050a093 | 2005-07-07 17:56:33 -0700 | [diff] [blame] | 443 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 444 | while (get_tb() < start_snooze) { |
| 445 | if (need_resched() || cpu_is_offline(cpu)) |
| 446 | goto out; |
| 447 | ppc64_runlatch_off(); |
| 448 | HMT_low(); |
| 449 | HMT_very_low(); |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 450 | } |
| 451 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 452 | HMT_medium(); |
| 453 | clear_thread_flag(TIF_POLLING_NRFLAG); |
| 454 | smp_mb(); |
| 455 | local_irq_disable(); |
| 456 | if (need_resched() || cpu_is_offline(cpu)) |
| 457 | goto out; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 458 | } |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 459 | |
| 460 | /* |
| 461 | * Cede if the other thread is not idle, so that it can |
| 462 | * go single-threaded. If the other thread is idle, |
| 463 | * we ask the hypervisor if it has pending work it |
| 464 | * wants to do and cede if it does. Otherwise we keep |
| 465 | * polling in order to reduce interrupt latency. |
| 466 | * |
| 467 | * Doing the cede when the other thread is active will |
| 468 | * result in this thread going dormant, meaning the other |
| 469 | * thread gets to run in single-threaded (ST) mode, which |
| 470 | * is slightly faster than SMT mode with this thread at |
| 471 | * very low priority. The cede enables interrupts, which |
| 472 | * doesn't matter here. |
| 473 | */ |
Segher Boessenkool | 706c8c9 | 2006-03-30 14:49:40 +0200 | [diff] [blame] | 474 | if (!lppaca[cpu ^ 1].idle || poll_pending() == H_PENDING) |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 475 | cede_processor(); |
| 476 | |
| 477 | out: |
| 478 | HMT_medium(); |
| 479 | get_lppaca()->idle = 0; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 480 | } |
| 481 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 482 | static void pseries_shared_idle_sleep(void) |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 483 | { |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 484 | /* |
| 485 | * Indicate to the HV that we are idle. Now would be |
| 486 | * a good time to find other work to dispatch. |
| 487 | */ |
| 488 | get_lppaca()->idle = 1; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 489 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 490 | /* |
| 491 | * Yield the processor to the hypervisor. We return if |
| 492 | * an external interrupt occurs (which are driven prior |
| 493 | * to returning here) or if a prod occurs from another |
| 494 | * processor. When returning here, external interrupts |
| 495 | * are enabled. |
| 496 | */ |
| 497 | cede_processor(); |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 498 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 499 | get_lppaca()->idle = 0; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 500 | } |
| 501 | |
Paul Mackerras | 4267292 | 2005-09-12 17:17:36 +1000 | [diff] [blame] | 502 | static int pSeries_pci_probe_mode(struct pci_bus *bus) |
| 503 | { |
Michael Ellerman | 57cfb81 | 2006-03-21 20:45:59 +1100 | [diff] [blame] | 504 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
Paul Mackerras | 4267292 | 2005-09-12 17:17:36 +1000 | [diff] [blame] | 505 | return PCI_PROBE_DEVTREE; |
| 506 | return PCI_PROBE_NORMAL; |
| 507 | } |
| 508 | |
Michael Ellerman | c5e2435 | 2005-11-12 00:06:05 +1100 | [diff] [blame] | 509 | #ifdef CONFIG_KEXEC |
| 510 | static void pseries_kexec_cpu_down(int crash_shutdown, int secondary) |
| 511 | { |
| 512 | /* Don't risk a hypervisor call if we're crashing */ |
Michael Neuling | 4dc4325 | 2006-02-07 10:58:21 +1100 | [diff] [blame] | 513 | if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) { |
David Gibson | 3356bb9f7 | 2006-01-13 10:26:42 +1100 | [diff] [blame] | 514 | unsigned long vpa = __pa(get_lppaca()); |
Michael Ellerman | c5e2435 | 2005-11-12 00:06:05 +1100 | [diff] [blame] | 515 | |
| 516 | if (unregister_vpa(hard_smp_processor_id(), vpa)) { |
| 517 | printk("VPA deregistration of cpu %u (hw_cpu_id %d) " |
| 518 | "failed\n", smp_processor_id(), |
| 519 | hard_smp_processor_id()); |
| 520 | } |
| 521 | } |
| 522 | |
| 523 | if (ppc64_interrupt_controller == IC_OPEN_PIC) |
| 524 | mpic_teardown_this_cpu(secondary); |
| 525 | else |
| 526 | xics_teardown_cpu(secondary); |
| 527 | } |
| 528 | #endif |
| 529 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 530 | define_machine(pseries) { |
| 531 | .name = "pSeries", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | .probe = pSeries_probe, |
| 533 | .setup_arch = pSeries_setup_arch, |
| 534 | .init_early = pSeries_init_early, |
Paul Mackerras | 0dd194d | 2005-10-20 20:48:19 +1000 | [diff] [blame] | 535 | .show_cpuinfo = pSeries_show_cpuinfo, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | .log_error = pSeries_log_error, |
| 537 | .pcibios_fixup = pSeries_final_fixup, |
Paul Mackerras | 4267292 | 2005-09-12 17:17:36 +1000 | [diff] [blame] | 538 | .pci_probe_mode = pSeries_pci_probe_mode, |
John Rose | dad32bb | 2005-06-23 17:09:54 +1000 | [diff] [blame] | 539 | .irq_bus_setup = pSeries_irq_bus_setup, |
Paul Mackerras | f4fcbbe | 2005-11-03 14:41:19 +1100 | [diff] [blame] | 540 | .restart = rtas_restart, |
| 541 | .power_off = rtas_power_off, |
| 542 | .halt = rtas_halt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | .panic = rtas_os_term, |
| 544 | .cpu_die = pSeries_mach_cpu_die, |
Arnd Bergmann | 773bf9c | 2005-06-23 09:43:18 +1000 | [diff] [blame] | 545 | .get_boot_time = rtas_get_boot_time, |
| 546 | .get_rtc_time = rtas_get_rtc_time, |
| 547 | .set_rtc_time = rtas_set_rtc_time, |
Arnd Bergmann | 10f7e7c | 2005-06-23 09:43:07 +1000 | [diff] [blame] | 548 | .calibrate_decr = generic_calibrate_decr, |
Arnd Bergmann | 6566c6f | 2005-06-23 09:43:28 +1000 | [diff] [blame] | 549 | .progress = rtas_progress, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | .check_legacy_ioport = pSeries_check_legacy_ioport, |
| 551 | .system_reset_exception = pSeries_system_reset_exception, |
| 552 | .machine_check_exception = pSeries_machine_check_exception, |
Michael Ellerman | c5e2435 | 2005-11-12 00:06:05 +1100 | [diff] [blame] | 553 | #ifdef CONFIG_KEXEC |
| 554 | .kexec_cpu_down = pseries_kexec_cpu_down, |
Michael Ellerman | 3d1229d | 2005-11-14 23:35:00 +1100 | [diff] [blame] | 555 | .machine_kexec = default_machine_kexec, |
| 556 | .machine_kexec_prepare = default_machine_kexec_prepare, |
Michael Ellerman | cc53291 | 2005-12-04 18:39:43 +1100 | [diff] [blame] | 557 | .machine_crash_shutdown = default_machine_crash_shutdown, |
Michael Ellerman | c5e2435 | 2005-11-12 00:06:05 +1100 | [diff] [blame] | 558 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | }; |