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 | |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 19 | #include <linux/cpu.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/errno.h> |
| 21 | #include <linux/sched.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/mm.h> |
| 24 | #include <linux/stddef.h> |
| 25 | #include <linux/unistd.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/user.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/tty.h> |
| 28 | #include <linux/major.h> |
| 29 | #include <linux/interrupt.h> |
| 30 | #include <linux/reboot.h> |
| 31 | #include <linux/init.h> |
| 32 | #include <linux/ioport.h> |
| 33 | #include <linux/console.h> |
| 34 | #include <linux/pci.h> |
Olaf Hering | cebb2b1 | 2005-07-10 19:35:15 +0000 | [diff] [blame] | 35 | #include <linux/utsname.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/adb.h> |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/delay.h> |
| 39 | #include <linux/irq.h> |
| 40 | #include <linux/seq_file.h> |
| 41 | #include <linux/root_dev.h> |
| 42 | |
| 43 | #include <asm/mmu.h> |
| 44 | #include <asm/processor.h> |
| 45 | #include <asm/io.h> |
| 46 | #include <asm/pgtable.h> |
| 47 | #include <asm/prom.h> |
| 48 | #include <asm/rtas.h> |
| 49 | #include <asm/pci-bridge.h> |
| 50 | #include <asm/iommu.h> |
| 51 | #include <asm/dma.h> |
| 52 | #include <asm/machdep.h> |
| 53 | #include <asm/irq.h> |
| 54 | #include <asm/time.h> |
| 55 | #include <asm/nvram.h> |
David Gibson | 007e8f5 | 2005-10-28 15:35:50 +1000 | [diff] [blame] | 56 | #include "xics.h" |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 57 | #include <asm/pmc.h> |
Stephen Rothwell | bbeb3f4 | 2005-09-27 13:51:59 +1000 | [diff] [blame] | 58 | #include <asm/mpic.h> |
Stephen Rothwell | d387899 | 2005-09-28 02:50:25 +1000 | [diff] [blame] | 59 | #include <asm/ppc-pci.h> |
Paul Mackerras | 69a80d3 | 2005-10-10 22:03:41 +1000 | [diff] [blame] | 60 | #include <asm/i8259.h> |
| 61 | #include <asm/udbg.h> |
Paul Mackerras | 2249ca9 | 2005-11-07 13:18:13 +1100 | [diff] [blame] | 62 | #include <asm/smp.h> |
Michael Ellerman | 577830b | 2007-02-08 18:33:51 +1100 | [diff] [blame] | 63 | #include <asm/firmware.h> |
Stephen Rothwell | bed5927 | 2007-03-04 17:04:44 +1100 | [diff] [blame] | 64 | #include <asm/eeh.h> |
Kumar Gala | 2eb4afb | 2009-04-30 09:26:21 +0000 | [diff] [blame] | 65 | #include <asm/pSeries_reconfig.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
Michael Ellerman | a121872 | 2005-11-03 15:33:31 +1100 | [diff] [blame] | 67 | #include "plpar_wrappers.h" |
Michael Ellerman | 577830b | 2007-02-08 18:33:51 +1100 | [diff] [blame] | 68 | #include "pseries.h" |
Michael Ellerman | a121872 | 2005-11-03 15:33:31 +1100 | [diff] [blame] | 69 | |
Robert Jennings | 81f1499 | 2008-08-16 05:07:31 +1000 | [diff] [blame] | 70 | int CMO_PrPSP = -1; |
| 71 | int CMO_SecPSP = -1; |
| 72 | unsigned long CMO_PageSize = (ASM_CONST(1) << IOMMU_PAGE_SHIFT); |
Andrew Morton | d617a40 | 2008-08-21 11:16:26 +1000 | [diff] [blame] | 73 | EXPORT_SYMBOL(CMO_PageSize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | int fwnmi_active; /* TRUE if an FWNMI handler is present */ |
| 76 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 77 | static void pseries_shared_idle_sleep(void); |
| 78 | static void pseries_dedicated_idle_sleep(void); |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 79 | |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 80 | static struct device_node *pSeries_mpic_node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
Arnd Bergmann | 8446196 | 2006-01-11 00:00:02 +0000 | [diff] [blame] | 82 | static void pSeries_show_cpuinfo(struct seq_file *m) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | { |
| 84 | struct device_node *root; |
| 85 | const char *model = ""; |
| 86 | |
| 87 | root = of_find_node_by_path("/"); |
| 88 | if (root) |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 89 | model = of_get_property(root, "model", NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | seq_printf(m, "machine\t\t: CHRP %s\n", model); |
| 91 | of_node_put(root); |
| 92 | } |
| 93 | |
| 94 | /* Initialize firmware assisted non-maskable interrupts if |
| 95 | * the firmware supports this feature. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | */ |
| 97 | static void __init fwnmi_init(void) |
| 98 | { |
Michael Ellerman | 8c4f1f2 | 2005-12-04 18:39:33 +1100 | [diff] [blame] | 99 | unsigned long system_reset_addr, machine_check_addr; |
| 100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | int ibm_nmi_register = rtas_token("ibm,nmi-register"); |
| 102 | if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE) |
| 103 | return; |
Michael Ellerman | 8c4f1f2 | 2005-12-04 18:39:33 +1100 | [diff] [blame] | 104 | |
| 105 | /* If the kernel's not linked at zero we point the firmware at low |
| 106 | * addresses anyway, and use a trampoline to get to the real code. */ |
| 107 | system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START; |
| 108 | machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START; |
| 109 | |
| 110 | if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr, |
| 111 | machine_check_addr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | fwnmi_active = 1; |
| 113 | } |
| 114 | |
Michael Ellerman | 541b275 | 2008-05-08 14:27:23 +1000 | [diff] [blame] | 115 | static void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc) |
Benjamin Herrenschmidt | b9e5b4e | 2006-07-03 19:32:51 +1000 | [diff] [blame] | 116 | { |
Thomas Gleixner | ec775d0 | 2011-03-25 16:45:20 +0100 | [diff] [blame] | 117 | struct irq_chip *chip = irq_desc_get_chip(desc); |
Olaf Hering | 35a84c2 | 2006-10-07 22:08:26 +1000 | [diff] [blame] | 118 | unsigned int cascade_irq = i8259_irq(); |
Lennert Buytenhek | 79f26c2 | 2011-03-07 13:59:45 +0000 | [diff] [blame] | 119 | |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 120 | if (cascade_irq != NO_IRQ) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 121 | generic_handle_irq(cascade_irq); |
Lennert Buytenhek | 79f26c2 | 2011-03-07 13:59:45 +0000 | [diff] [blame] | 122 | |
| 123 | chip->irq_eoi(&desc->irq_data); |
Benjamin Herrenschmidt | b9e5b4e | 2006-07-03 19:32:51 +1000 | [diff] [blame] | 124 | } |
| 125 | |
Michael Ellerman | 30d6ad2 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 126 | static void __init pseries_setup_i8259_cascade(void) |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 127 | { |
| 128 | struct device_node *np, *old, *found = NULL; |
Michael Ellerman | 30d6ad2 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 129 | unsigned int cascade; |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 130 | const u32 *addrp; |
| 131 | unsigned long intack = 0; |
Michael Ellerman | 30d6ad2 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 132 | int naddr; |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 133 | |
Michael Ellerman | 30d6ad2 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 134 | for_each_node_by_type(np, "interrupt-controller") { |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 135 | if (of_device_is_compatible(np, "chrp,iic")) { |
| 136 | found = np; |
| 137 | break; |
| 138 | } |
Michael Ellerman | 30d6ad2 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 139 | } |
| 140 | |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 141 | if (found == NULL) { |
Michael Ellerman | 30d6ad2 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 142 | printk(KERN_DEBUG "pic: no ISA interrupt controller\n"); |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 143 | return; |
| 144 | } |
Michael Ellerman | 30d6ad2 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 145 | |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 146 | cascade = irq_of_parse_and_map(found, 0); |
| 147 | if (cascade == NO_IRQ) { |
Michael Ellerman | 30d6ad2 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 148 | printk(KERN_ERR "pic: failed to map cascade interrupt"); |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 149 | return; |
| 150 | } |
Michael Ellerman | 30d6ad2 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 151 | pr_debug("pic: cascade mapped to irq %d\n", cascade); |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 152 | |
| 153 | for (old = of_node_get(found); old != NULL ; old = np) { |
| 154 | np = of_get_parent(old); |
| 155 | of_node_put(old); |
| 156 | if (np == NULL) |
| 157 | break; |
| 158 | if (strcmp(np->name, "pci") != 0) |
| 159 | continue; |
| 160 | addrp = of_get_property(np, "8259-interrupt-acknowledge", NULL); |
| 161 | if (addrp == NULL) |
| 162 | continue; |
| 163 | naddr = of_n_addr_cells(np); |
| 164 | intack = addrp[naddr-1]; |
| 165 | if (naddr > 1) |
| 166 | intack |= ((unsigned long)addrp[naddr-2]) << 32; |
| 167 | } |
| 168 | if (intack) |
Michael Ellerman | 30d6ad2 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 169 | printk(KERN_DEBUG "pic: PCI 8259 intack at 0x%016lx\n", intack); |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 170 | i8259_init(found, intack); |
| 171 | of_node_put(found); |
Thomas Gleixner | ec775d0 | 2011-03-25 16:45:20 +0100 | [diff] [blame] | 172 | irq_set_chained_handler(cascade, pseries_8259_cascade); |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 173 | } |
| 174 | |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 175 | static void __init pseries_mpic_init_IRQ(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | { |
Michael Ellerman | f01567d | 2008-04-01 17:42:26 +1100 | [diff] [blame] | 177 | struct device_node *np; |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 178 | const unsigned int *opprop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | unsigned long openpic_addr = 0; |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 180 | int naddr, n, i, opplen; |
| 181 | struct mpic *mpic; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 183 | np = of_find_node_by_path("/"); |
Stephen Rothwell | a8bda5d | 2007-04-03 10:56:50 +1000 | [diff] [blame] | 184 | naddr = of_n_addr_cells(np); |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 185 | opprop = of_get_property(np, "platform-open-pic", &opplen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | if (opprop != 0) { |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 187 | openpic_addr = of_read_number(opprop, naddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr); |
| 189 | } |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 190 | of_node_put(np); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
| 192 | BUG_ON(openpic_addr == 0); |
| 193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | /* Setup the openpic driver */ |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 195 | mpic = mpic_alloc(pSeries_mpic_node, openpic_addr, |
| 196 | MPIC_PRIMARY, |
| 197 | 16, 250, /* isu size, irq count */ |
| 198 | " MPIC "); |
| 199 | BUG_ON(mpic == NULL); |
| 200 | |
| 201 | /* Add ISUs */ |
| 202 | opplen /= sizeof(u32); |
| 203 | for (n = 0, i = naddr; i < opplen; i += naddr, n++) { |
| 204 | unsigned long isuaddr = of_read_number(opprop + i, naddr); |
| 205 | mpic_assign_isu(mpic, n, isuaddr); |
| 206 | } |
| 207 | |
| 208 | /* All ISUs are setup, complete initialization */ |
| 209 | mpic_init(mpic); |
| 210 | |
| 211 | /* Look for cascade */ |
Michael Ellerman | f01567d | 2008-04-01 17:42:26 +1100 | [diff] [blame] | 212 | pseries_setup_i8259_cascade(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | } |
| 214 | |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 215 | static void __init pseries_xics_init_IRQ(void) |
| 216 | { |
| 217 | xics_init_IRQ(); |
Michael Ellerman | 30d6ad2 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 218 | pseries_setup_i8259_cascade(); |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 219 | } |
| 220 | |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 221 | static void pseries_lpar_enable_pmcs(void) |
| 222 | { |
| 223 | unsigned long set, reset; |
| 224 | |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 225 | set = 1UL << 63; |
| 226 | reset = 0; |
| 227 | plpar_hcall_norets(H_PERFMON, set, reset); |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 228 | } |
| 229 | |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 230 | static void __init pseries_discover_pic(void) |
| 231 | { |
| 232 | struct device_node *np; |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 233 | const char *typep; |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 234 | |
| 235 | for (np = NULL; (np = of_find_node_by_name(np, |
| 236 | "interrupt-controller"));) { |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 237 | typep = of_get_property(np, "compatible", NULL); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 238 | if (strstr(typep, "open-pic")) { |
| 239 | pSeries_mpic_node = of_node_get(np); |
| 240 | ppc_md.init_IRQ = pseries_mpic_init_IRQ; |
| 241 | ppc_md.get_irq = mpic_get_irq; |
Michael Ellerman | dce623e | 2007-02-08 18:33:55 +1100 | [diff] [blame] | 242 | setup_kexec_cpu_down_mpic(); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 243 | smp_init_pseries_mpic(); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 244 | return; |
| 245 | } else if (strstr(typep, "ppc-xicp")) { |
Michael Ellerman | 032ace7 | 2008-04-01 17:42:25 +1100 | [diff] [blame] | 246 | ppc_md.init_IRQ = pseries_xics_init_IRQ; |
Michael Ellerman | dce623e | 2007-02-08 18:33:55 +1100 | [diff] [blame] | 247 | setup_kexec_cpu_down_xics(); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 248 | smp_init_pseries_xics(); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 249 | return; |
| 250 | } |
| 251 | } |
| 252 | printk(KERN_ERR "pSeries_discover_pic: failed to recognize" |
| 253 | " interrupt-controller\n"); |
| 254 | } |
| 255 | |
Kumar Gala | 2eb4afb | 2009-04-30 09:26:21 +0000 | [diff] [blame] | 256 | static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long action, void *node) |
| 257 | { |
| 258 | struct device_node *np = node; |
| 259 | struct pci_dn *pci = NULL; |
| 260 | int err = NOTIFY_OK; |
| 261 | |
| 262 | switch (action) { |
| 263 | case PSERIES_RECONFIG_ADD: |
| 264 | pci = np->parent->data; |
| 265 | if (pci) |
| 266 | update_dn_pci_info(np, pci->phb); |
| 267 | break; |
| 268 | default: |
| 269 | err = NOTIFY_DONE; |
| 270 | break; |
| 271 | } |
| 272 | return err; |
| 273 | } |
| 274 | |
| 275 | static struct notifier_block pci_dn_reconfig_nb = { |
| 276 | .notifier_call = pci_dn_reconfig_notifier, |
| 277 | }; |
| 278 | |
Paul Mackerras | cf9efce | 2010-08-26 19:56:43 +0000 | [diff] [blame] | 279 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING |
| 280 | /* |
| 281 | * Allocate space for the dispatch trace log for all possible cpus |
| 282 | * and register the buffers with the hypervisor. This is used for |
| 283 | * computing time stolen by the hypervisor. |
| 284 | */ |
| 285 | static int alloc_dispatch_logs(void) |
| 286 | { |
| 287 | int cpu, ret; |
| 288 | struct paca_struct *pp; |
| 289 | struct dtl_entry *dtl; |
Nishanth Aravamudan | 127493d | 2011-04-13 19:45:59 +0000 | [diff] [blame] | 290 | struct kmem_cache *dtl_cache; |
Paul Mackerras | cf9efce | 2010-08-26 19:56:43 +0000 | [diff] [blame] | 291 | |
| 292 | if (!firmware_has_feature(FW_FEATURE_SPLPAR)) |
| 293 | return 0; |
| 294 | |
Nishanth Aravamudan | 127493d | 2011-04-13 19:45:59 +0000 | [diff] [blame] | 295 | dtl_cache = kmem_cache_create("dtl", DISPATCH_LOG_BYTES, |
| 296 | DISPATCH_LOG_BYTES, 0, NULL); |
| 297 | if (!dtl_cache) { |
| 298 | pr_warn("Failed to create dispatch trace log buffer cache\n"); |
| 299 | pr_warn("Stolen time statistics will be unreliable\n"); |
| 300 | return 0; |
| 301 | } |
| 302 | |
Paul Mackerras | cf9efce | 2010-08-26 19:56:43 +0000 | [diff] [blame] | 303 | for_each_possible_cpu(cpu) { |
| 304 | pp = &paca[cpu]; |
Nishanth Aravamudan | 127493d | 2011-04-13 19:45:59 +0000 | [diff] [blame] | 305 | dtl = kmem_cache_alloc(dtl_cache, GFP_KERNEL); |
Paul Mackerras | cf9efce | 2010-08-26 19:56:43 +0000 | [diff] [blame] | 306 | if (!dtl) { |
| 307 | pr_warn("Failed to allocate dispatch trace log for cpu %d\n", |
| 308 | cpu); |
| 309 | pr_warn("Stolen time statistics will be unreliable\n"); |
| 310 | break; |
| 311 | } |
| 312 | |
| 313 | pp->dtl_ridx = 0; |
| 314 | pp->dispatch_log = dtl; |
| 315 | pp->dispatch_log_end = dtl + N_DISPATCH_LOG; |
| 316 | pp->dtl_curr = dtl; |
| 317 | } |
| 318 | |
| 319 | /* Register the DTL for the current (boot) cpu */ |
| 320 | dtl = get_paca()->dispatch_log; |
| 321 | get_paca()->dtl_ridx = 0; |
| 322 | get_paca()->dtl_curr = dtl; |
| 323 | get_paca()->lppaca_ptr->dtl_idx = 0; |
| 324 | |
| 325 | /* hypervisor reads buffer length from this field */ |
| 326 | dtl->enqueue_to_dispatch_time = DISPATCH_LOG_BYTES; |
| 327 | ret = register_dtl(hard_smp_processor_id(), __pa(dtl)); |
| 328 | if (ret) |
| 329 | pr_warn("DTL registration failed for boot cpu %d (%d)\n", |
| 330 | smp_processor_id(), ret); |
| 331 | get_paca()->lppaca_ptr->dtl_enable_mask = 2; |
| 332 | |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | early_initcall(alloc_dispatch_logs); |
| 337 | #endif /* CONFIG_VIRT_CPU_ACCOUNTING */ |
| 338 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | static void __init pSeries_setup_arch(void) |
| 340 | { |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 341 | /* Discover PIC type and setup ppc_md accordingly */ |
| 342 | pseries_discover_pic(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | /* openpic global configuration register (64-bit format). */ |
| 345 | /* openpic Interrupt Source Unit pointer (64-bit format). */ |
| 346 | /* python0 facility area (mmio) (64-bit format) REAL address. */ |
| 347 | |
| 348 | /* init to some ~sane value until calibrate_delay() runs */ |
| 349 | loops_per_jiffy = 50000000; |
| 350 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | fwnmi_init(); |
| 352 | |
| 353 | /* Find and initialize PCI host bridges */ |
| 354 | init_pci_config_tokens(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | find_and_init_phbs(); |
Kumar Gala | 2eb4afb | 2009-04-30 09:26:21 +0000 | [diff] [blame] | 356 | pSeries_reconfig_notifier_register(&pci_dn_reconfig_nb); |
Paul Mackerras | 0160f53 | 2005-09-13 20:56:20 +1000 | [diff] [blame] | 357 | eeh_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | pSeries_nvram_init(); |
| 360 | |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 361 | /* Choose an idle loop */ |
Stephen Rothwell | 1ababe1 | 2005-08-03 14:35:25 +1000 | [diff] [blame] | 362 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { |
Stephen Rothwell | 8d15a3e | 2005-08-03 14:40:16 +1000 | [diff] [blame] | 363 | vpa_init(boot_cpuid); |
David Gibson | 3356bb9f7 | 2006-01-13 10:26:42 +1100 | [diff] [blame] | 364 | if (get_lppaca()->shared_proc) { |
Olof Johansson | 4baaf0c | 2006-04-12 15:23:22 -0500 | [diff] [blame] | 365 | printk(KERN_DEBUG "Using shared processor idle loop\n"); |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 366 | ppc_md.power_save = pseries_shared_idle_sleep; |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 367 | } else { |
Olof Johansson | 4baaf0c | 2006-04-12 15:23:22 -0500 | [diff] [blame] | 368 | printk(KERN_DEBUG "Using dedicated idle loop\n"); |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 369 | ppc_md.power_save = pseries_dedicated_idle_sleep; |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 370 | } |
| 371 | } else { |
Olof Johansson | 4baaf0c | 2006-04-12 15:23:22 -0500 | [diff] [blame] | 372 | printk(KERN_DEBUG "Using default idle loop\n"); |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 373 | } |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 374 | |
Michael Ellerman | 57cfb81 | 2006-03-21 20:45:59 +1100 | [diff] [blame] | 375 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 376 | ppc_md.enable_pmcs = pseries_lpar_enable_pmcs; |
| 377 | else |
| 378 | ppc_md.enable_pmcs = power4_enable_pmcs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | } |
| 380 | |
| 381 | static int __init pSeries_init_panel(void) |
| 382 | { |
| 383 | /* Manually leave the kernel version on the panel. */ |
| 384 | ppc_md.progress("Linux ppc64\n", 0); |
Serge E. Hallyn | 96b644b | 2006-10-02 02:18:13 -0700 | [diff] [blame] | 385 | ppc_md.progress(init_utsname()->version, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
| 387 | return 0; |
| 388 | } |
Benjamin Herrenschmidt | f86d6b9 | 2011-03-31 18:49:45 +0000 | [diff] [blame] | 389 | machine_arch_initcall(pseries, pSeries_init_panel); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
Michael Ellerman | cab0af9 | 2005-11-03 15:30:49 +1100 | [diff] [blame] | 391 | static int pseries_set_dabr(unsigned long dabr) |
| 392 | { |
Michael Ellerman | 76032de | 2005-11-07 13:12:03 +1100 | [diff] [blame] | 393 | return plpar_hcall_norets(H_SET_DABR, dabr); |
Michael Ellerman | cab0af9 | 2005-11-03 15:30:49 +1100 | [diff] [blame] | 394 | } |
| 395 | |
Michael Ellerman | 76032de | 2005-11-07 13:12:03 +1100 | [diff] [blame] | 396 | static int pseries_set_xdabr(unsigned long dabr) |
| 397 | { |
| 398 | /* We want to catch accesses from kernel and userspace */ |
| 399 | return plpar_hcall_norets(H_SET_XDABR, dabr, |
| 400 | H_DABRX_KERNEL | H_DABRX_USER); |
| 401 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
Robert Jennings | e46de42 | 2008-07-24 04:29:03 +1000 | [diff] [blame] | 403 | #define CMO_CHARACTERISTICS_TOKEN 44 |
| 404 | #define CMO_MAXLENGTH 1026 |
| 405 | |
| 406 | /** |
| 407 | * fw_cmo_feature_init - FW_FEATURE_CMO is not stored in ibm,hypertas-functions, |
| 408 | * handle that here. (Stolen from parse_system_parameter_string) |
| 409 | */ |
| 410 | void pSeries_cmo_feature_init(void) |
| 411 | { |
| 412 | char *ptr, *key, *value, *end; |
| 413 | int call_status; |
Robert Jennings | 81f1499 | 2008-08-16 05:07:31 +1000 | [diff] [blame] | 414 | int page_order = IOMMU_PAGE_SHIFT; |
Robert Jennings | e46de42 | 2008-07-24 04:29:03 +1000 | [diff] [blame] | 415 | |
| 416 | pr_debug(" -> fw_cmo_feature_init()\n"); |
| 417 | spin_lock(&rtas_data_buf_lock); |
| 418 | memset(rtas_data_buf, 0, RTAS_DATA_BUF_SIZE); |
| 419 | call_status = rtas_call(rtas_token("ibm,get-system-parameter"), 3, 1, |
| 420 | NULL, |
| 421 | CMO_CHARACTERISTICS_TOKEN, |
| 422 | __pa(rtas_data_buf), |
| 423 | RTAS_DATA_BUF_SIZE); |
| 424 | |
| 425 | if (call_status != 0) { |
| 426 | spin_unlock(&rtas_data_buf_lock); |
| 427 | pr_debug("CMO not available\n"); |
| 428 | pr_debug(" <- fw_cmo_feature_init()\n"); |
| 429 | return; |
| 430 | } |
| 431 | |
| 432 | end = rtas_data_buf + CMO_MAXLENGTH - 2; |
| 433 | ptr = rtas_data_buf + 2; /* step over strlen value */ |
| 434 | key = value = ptr; |
| 435 | |
| 436 | while (*ptr && (ptr <= end)) { |
| 437 | /* Separate the key and value by replacing '=' with '\0' and |
| 438 | * point the value at the string after the '=' |
| 439 | */ |
| 440 | if (ptr[0] == '=') { |
| 441 | ptr[0] = '\0'; |
| 442 | value = ptr + 1; |
| 443 | } else if (ptr[0] == '\0' || ptr[0] == ',') { |
| 444 | /* Terminate the string containing the key/value pair */ |
| 445 | ptr[0] = '\0'; |
| 446 | |
| 447 | if (key == value) { |
| 448 | pr_debug("Malformed key/value pair\n"); |
| 449 | /* Never found a '=', end processing */ |
| 450 | break; |
| 451 | } |
| 452 | |
Robert Jennings | 81f1499 | 2008-08-16 05:07:31 +1000 | [diff] [blame] | 453 | if (0 == strcmp(key, "CMOPageSize")) |
| 454 | page_order = simple_strtol(value, NULL, 10); |
| 455 | else if (0 == strcmp(key, "PrPSP")) |
| 456 | CMO_PrPSP = simple_strtol(value, NULL, 10); |
Robert Jennings | e46de42 | 2008-07-24 04:29:03 +1000 | [diff] [blame] | 457 | else if (0 == strcmp(key, "SecPSP")) |
Robert Jennings | 81f1499 | 2008-08-16 05:07:31 +1000 | [diff] [blame] | 458 | CMO_SecPSP = simple_strtol(value, NULL, 10); |
Robert Jennings | e46de42 | 2008-07-24 04:29:03 +1000 | [diff] [blame] | 459 | value = key = ptr + 1; |
| 460 | } |
| 461 | ptr++; |
| 462 | } |
| 463 | |
Robert Jennings | 81f1499 | 2008-08-16 05:07:31 +1000 | [diff] [blame] | 464 | /* Page size is returned as the power of 2 of the page size, |
| 465 | * convert to the page size in bytes before returning |
| 466 | */ |
| 467 | CMO_PageSize = 1 << page_order; |
| 468 | pr_debug("CMO_PageSize = %lu\n", CMO_PageSize); |
| 469 | |
| 470 | if (CMO_PrPSP != -1 || CMO_SecPSP != -1) { |
Robert Jennings | e46de42 | 2008-07-24 04:29:03 +1000 | [diff] [blame] | 471 | pr_info("CMO enabled\n"); |
Robert Jennings | 81f1499 | 2008-08-16 05:07:31 +1000 | [diff] [blame] | 472 | pr_debug("CMO enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, |
| 473 | CMO_SecPSP); |
Robert Jennings | e46de42 | 2008-07-24 04:29:03 +1000 | [diff] [blame] | 474 | powerpc_firmware_features |= FW_FEATURE_CMO; |
| 475 | } else |
Robert Jennings | 81f1499 | 2008-08-16 05:07:31 +1000 | [diff] [blame] | 476 | pr_debug("CMO not enabled, PrPSP=%d, SecPSP=%d\n", CMO_PrPSP, |
| 477 | CMO_SecPSP); |
Robert Jennings | e46de42 | 2008-07-24 04:29:03 +1000 | [diff] [blame] | 478 | spin_unlock(&rtas_data_buf_lock); |
| 479 | pr_debug(" <- fw_cmo_feature_init()\n"); |
| 480 | } |
| 481 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | /* |
| 483 | * Early initialization. Relocation is on but do not reference unbolted pages |
| 484 | */ |
| 485 | static void __init pSeries_init_early(void) |
| 486 | { |
Michael Ellerman | f7ebf35 | 2008-04-24 15:13:19 +1000 | [diff] [blame] | 487 | pr_debug(" -> pSeries_init_early()\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
Michael Ellerman | 57cfb81 | 2006-03-21 20:45:59 +1100 | [diff] [blame] | 489 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | find_udbg_vterm(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
Michael Ellerman | 76032de | 2005-11-07 13:12:03 +1100 | [diff] [blame] | 492 | if (firmware_has_feature(FW_FEATURE_DABR)) |
Michael Ellerman | cab0af9 | 2005-11-03 15:30:49 +1100 | [diff] [blame] | 493 | ppc_md.set_dabr = pseries_set_dabr; |
Michael Ellerman | 76032de | 2005-11-07 13:12:03 +1100 | [diff] [blame] | 494 | else if (firmware_has_feature(FW_FEATURE_XDABR)) |
| 495 | ppc_md.set_dabr = pseries_set_xdabr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | |
Robert Jennings | e46de42 | 2008-07-24 04:29:03 +1000 | [diff] [blame] | 497 | pSeries_cmo_feature_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | iommu_init_early_pSeries(); |
| 499 | |
Michael Ellerman | f7ebf35 | 2008-04-24 15:13:19 +1000 | [diff] [blame] | 500 | pr_debug(" <- pSeries_init_early()\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
| 502 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | /* |
| 504 | * Called very early, MMU is off, device-tree isn't unflattened |
| 505 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 507 | static int __init pSeries_probe_hypertas(unsigned long node, |
| 508 | const char *uname, int depth, |
| 509 | void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | { |
Michael Neuling | ca8ffc9 | 2007-07-19 07:56:32 +1000 | [diff] [blame] | 511 | const char *hypertas; |
| 512 | unsigned long len; |
| 513 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 514 | if (depth != 1 || |
| 515 | (strcmp(uname, "rtas") != 0 && strcmp(uname, "rtas@0") != 0)) |
Michael Neuling | ca8ffc9 | 2007-07-19 07:56:32 +1000 | [diff] [blame] | 516 | return 0; |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 517 | |
Michael Neuling | ca8ffc9 | 2007-07-19 07:56:32 +1000 | [diff] [blame] | 518 | hypertas = of_get_flat_dt_prop(node, "ibm,hypertas-functions", &len); |
| 519 | if (!hypertas) |
| 520 | return 1; |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 521 | |
Michael Neuling | ca8ffc9 | 2007-07-19 07:56:32 +1000 | [diff] [blame] | 522 | powerpc_firmware_features |= FW_FEATURE_LPAR; |
| 523 | fw_feature_init(hypertas, len); |
| 524 | |
| 525 | return 1; |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 526 | } |
| 527 | |
| 528 | static int __init pSeries_probe(void) |
| 529 | { |
Arnd Bergmann | 133dda1 | 2006-06-07 12:04:18 +1000 | [diff] [blame] | 530 | unsigned long root = of_get_flat_dt_root(); |
Anton Blanchard | 5773bbc | 2006-12-08 18:08:37 +1100 | [diff] [blame] | 531 | char *dtype = of_get_flat_dt_prop(root, "device_type", NULL); |
| 532 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 533 | if (dtype == NULL) |
| 534 | return 0; |
| 535 | if (strcmp(dtype, "chrp")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | return 0; |
| 537 | |
Arnd Bergmann | 133dda1 | 2006-06-07 12:04:18 +1000 | [diff] [blame] | 538 | /* Cell blades firmware claims to be chrp while it's not. Until this |
| 539 | * is fixed, we need to avoid those here. |
| 540 | */ |
| 541 | if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0") || |
| 542 | of_flat_dt_is_compatible(root, "IBM,CBEA")) |
| 543 | return 0; |
| 544 | |
Michael Ellerman | f7ebf35 | 2008-04-24 15:13:19 +1000 | [diff] [blame] | 545 | pr_debug("pSeries detected, looking for LPAR capability...\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 547 | /* Now try to figure out if we are running on LPAR */ |
| 548 | of_scan_flat_dt(pSeries_probe_hypertas, NULL); |
| 549 | |
Anton Blanchard | a223535 | 2006-12-08 18:22:09 +1100 | [diff] [blame] | 550 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
| 551 | hpte_init_lpar(); |
| 552 | else |
| 553 | hpte_init_native(); |
| 554 | |
Michael Ellerman | f7ebf35 | 2008-04-24 15:13:19 +1000 | [diff] [blame] | 555 | pr_debug("Machine is%s LPAR !\n", |
| 556 | (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not"); |
Michael Ellerman | 57cfb81 | 2006-03-21 20:45:59 +1100 | [diff] [blame] | 557 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | return 1; |
| 559 | } |
| 560 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 561 | |
Anton Blanchard | b878dc0 | 2010-05-16 20:02:39 +0000 | [diff] [blame] | 562 | DECLARE_PER_CPU(long, smt_snooze_delay); |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 563 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 564 | static void pseries_dedicated_idle_sleep(void) |
Paul Mackerras | 143a1de | 2005-10-19 23:11:21 +1000 | [diff] [blame] | 565 | { |
Anton Blanchard | 050a093 | 2005-07-07 17:56:33 -0700 | [diff] [blame] | 566 | unsigned int cpu = smp_processor_id(); |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 567 | unsigned long start_snooze; |
Tony Breeds | 96366a8 | 2008-03-17 16:23:29 +1100 | [diff] [blame] | 568 | unsigned long in_purr, out_purr; |
Anton Blanchard | b878dc0 | 2010-05-16 20:02:39 +0000 | [diff] [blame] | 569 | long snooze = __get_cpu_var(smt_snooze_delay); |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 570 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 571 | /* |
| 572 | * Indicate to the HV that we are idle. Now would be |
| 573 | * a good time to find other work to dispatch. |
| 574 | */ |
| 575 | get_lppaca()->idle = 1; |
Jake Moilanen | d8c391a | 2007-06-08 07:27:11 +1000 | [diff] [blame] | 576 | get_lppaca()->donate_dedicated_cpu = 1; |
Tony Breeds | 96366a8 | 2008-03-17 16:23:29 +1100 | [diff] [blame] | 577 | in_purr = mfspr(SPRN_PURR); |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 578 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 579 | /* |
| 580 | * We come in with interrupts disabled, and need_resched() |
| 581 | * has been checked recently. If we should poll for a little |
| 582 | * while, do so. |
| 583 | */ |
Anton Blanchard | b878dc0 | 2010-05-16 20:02:39 +0000 | [diff] [blame] | 584 | if (snooze) { |
| 585 | start_snooze = get_tb() + snooze * tb_ticks_per_usec; |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 586 | local_irq_enable(); |
| 587 | set_thread_flag(TIF_POLLING_NRFLAG); |
Anton Blanchard | 050a093 | 2005-07-07 17:56:33 -0700 | [diff] [blame] | 588 | |
Anton Blanchard | b878dc0 | 2010-05-16 20:02:39 +0000 | [diff] [blame] | 589 | while ((snooze < 0) || (get_tb() < start_snooze)) { |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 590 | if (need_resched() || cpu_is_offline(cpu)) |
| 591 | goto out; |
| 592 | ppc64_runlatch_off(); |
| 593 | HMT_low(); |
| 594 | HMT_very_low(); |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 595 | } |
| 596 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 597 | HMT_medium(); |
| 598 | clear_thread_flag(TIF_POLLING_NRFLAG); |
| 599 | smp_mb(); |
| 600 | local_irq_disable(); |
| 601 | if (need_resched() || cpu_is_offline(cpu)) |
| 602 | goto out; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 603 | } |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 604 | |
Anton Blanchard | 0ddd3e7 | 2006-09-22 20:30:14 +1000 | [diff] [blame] | 605 | cede_processor(); |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 606 | |
| 607 | out: |
| 608 | HMT_medium(); |
Tony Breeds | 96366a8 | 2008-03-17 16:23:29 +1100 | [diff] [blame] | 609 | out_purr = mfspr(SPRN_PURR); |
| 610 | get_lppaca()->wait_state_cycles += out_purr - in_purr; |
Jake Moilanen | d8c391a | 2007-06-08 07:27:11 +1000 | [diff] [blame] | 611 | get_lppaca()->donate_dedicated_cpu = 0; |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 612 | get_lppaca()->idle = 0; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 613 | } |
| 614 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 615 | static void pseries_shared_idle_sleep(void) |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 616 | { |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 617 | /* |
| 618 | * Indicate to the HV that we are idle. Now would be |
| 619 | * a good time to find other work to dispatch. |
| 620 | */ |
| 621 | get_lppaca()->idle = 1; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 622 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 623 | /* |
| 624 | * Yield the processor to the hypervisor. We return if |
| 625 | * an external interrupt occurs (which are driven prior |
| 626 | * to returning here) or if a prod occurs from another |
| 627 | * processor. When returning here, external interrupts |
| 628 | * are enabled. |
| 629 | */ |
| 630 | cede_processor(); |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 631 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 632 | get_lppaca()->idle = 0; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 633 | } |
| 634 | |
Paul Mackerras | 4267292 | 2005-09-12 17:17:36 +1000 | [diff] [blame] | 635 | static int pSeries_pci_probe_mode(struct pci_bus *bus) |
| 636 | { |
Michael Ellerman | 57cfb81 | 2006-03-21 20:45:59 +1100 | [diff] [blame] | 637 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
Paul Mackerras | 4267292 | 2005-09-12 17:17:36 +1000 | [diff] [blame] | 638 | return PCI_PROBE_DEVTREE; |
| 639 | return PCI_PROBE_NORMAL; |
| 640 | } |
| 641 | |
Manish Ahuja | 5d30bf3 | 2007-02-08 16:01:17 -0600 | [diff] [blame] | 642 | /** |
| 643 | * pSeries_power_off - tell firmware about how to power off the system. |
| 644 | * |
| 645 | * This function calls either the power-off rtas token in normal cases |
| 646 | * or the ibm,power-off-ups token (if present & requested) in case of |
| 647 | * a power failure. If power-off token is used, power on will only be |
| 648 | * possible with power button press. If ibm,power-off-ups token is used |
| 649 | * it will allow auto poweron after power is restored. |
| 650 | */ |
Michael Ellerman | 541b275 | 2008-05-08 14:27:23 +1000 | [diff] [blame] | 651 | static void pSeries_power_off(void) |
Manish Ahuja | 5d30bf3 | 2007-02-08 16:01:17 -0600 | [diff] [blame] | 652 | { |
| 653 | int rc; |
| 654 | int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups"); |
| 655 | |
| 656 | if (rtas_flash_term_hook) |
| 657 | rtas_flash_term_hook(SYS_POWER_OFF); |
| 658 | |
| 659 | if (rtas_poweron_auto == 0 || |
| 660 | rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) { |
| 661 | rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1); |
| 662 | printk(KERN_INFO "RTAS power-off returned %d\n", rc); |
| 663 | } else { |
| 664 | rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL); |
| 665 | printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc); |
| 666 | } |
| 667 | for (;;); |
| 668 | } |
| 669 | |
Stephen Rothwell | bed5927 | 2007-03-04 17:04:44 +1100 | [diff] [blame] | 670 | #ifndef CONFIG_PCI |
| 671 | void pSeries_final_fixup(void) { } |
| 672 | #endif |
| 673 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 674 | define_machine(pseries) { |
| 675 | .name = "pSeries", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | .probe = pSeries_probe, |
| 677 | .setup_arch = pSeries_setup_arch, |
| 678 | .init_early = pSeries_init_early, |
Paul Mackerras | 0dd194d | 2005-10-20 20:48:19 +1000 | [diff] [blame] | 679 | .show_cpuinfo = pSeries_show_cpuinfo, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | .log_error = pSeries_log_error, |
| 681 | .pcibios_fixup = pSeries_final_fixup, |
Paul Mackerras | 4267292 | 2005-09-12 17:17:36 +1000 | [diff] [blame] | 682 | .pci_probe_mode = pSeries_pci_probe_mode, |
Paul Mackerras | f4fcbbe | 2005-11-03 14:41:19 +1100 | [diff] [blame] | 683 | .restart = rtas_restart, |
Manish Ahuja | 5d30bf3 | 2007-02-08 16:01:17 -0600 | [diff] [blame] | 684 | .power_off = pSeries_power_off, |
Paul Mackerras | f4fcbbe | 2005-11-03 14:41:19 +1100 | [diff] [blame] | 685 | .halt = rtas_halt, |
Paul Mackerras | 8f51506 | 2007-12-03 09:30:04 +1100 | [diff] [blame] | 686 | .panic = rtas_os_term, |
Arnd Bergmann | 773bf9c | 2005-06-23 09:43:18 +1000 | [diff] [blame] | 687 | .get_boot_time = rtas_get_boot_time, |
| 688 | .get_rtc_time = rtas_get_rtc_time, |
| 689 | .set_rtc_time = rtas_set_rtc_time, |
Arnd Bergmann | 10f7e7c | 2005-06-23 09:43:07 +1000 | [diff] [blame] | 690 | .calibrate_decr = generic_calibrate_decr, |
Arnd Bergmann | 6566c6f | 2005-06-23 09:43:28 +1000 | [diff] [blame] | 691 | .progress = rtas_progress, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | .system_reset_exception = pSeries_system_reset_exception, |
| 693 | .machine_check_exception = pSeries_machine_check_exception, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | }; |