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 | |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 21 | #include <linux/cpu.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/errno.h> |
| 23 | #include <linux/sched.h> |
| 24 | #include <linux/kernel.h> |
| 25 | #include <linux/mm.h> |
| 26 | #include <linux/stddef.h> |
| 27 | #include <linux/unistd.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/user.h> |
| 30 | #include <linux/a.out.h> |
| 31 | #include <linux/tty.h> |
| 32 | #include <linux/major.h> |
| 33 | #include <linux/interrupt.h> |
| 34 | #include <linux/reboot.h> |
| 35 | #include <linux/init.h> |
| 36 | #include <linux/ioport.h> |
| 37 | #include <linux/console.h> |
| 38 | #include <linux/pci.h> |
Olaf Hering | cebb2b1 | 2005-07-10 19:35:15 +0000 | [diff] [blame] | 39 | #include <linux/utsname.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/adb.h> |
| 41 | #include <linux/module.h> |
| 42 | #include <linux/delay.h> |
| 43 | #include <linux/irq.h> |
| 44 | #include <linux/seq_file.h> |
| 45 | #include <linux/root_dev.h> |
| 46 | |
| 47 | #include <asm/mmu.h> |
| 48 | #include <asm/processor.h> |
| 49 | #include <asm/io.h> |
| 50 | #include <asm/pgtable.h> |
| 51 | #include <asm/prom.h> |
| 52 | #include <asm/rtas.h> |
| 53 | #include <asm/pci-bridge.h> |
| 54 | #include <asm/iommu.h> |
| 55 | #include <asm/dma.h> |
| 56 | #include <asm/machdep.h> |
| 57 | #include <asm/irq.h> |
| 58 | #include <asm/time.h> |
| 59 | #include <asm/nvram.h> |
David Gibson | 007e8f5 | 2005-10-28 15:35:50 +1000 | [diff] [blame] | 60 | #include "xics.h" |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 61 | #include <asm/pmc.h> |
Stephen Rothwell | bbeb3f4 | 2005-09-27 13:51:59 +1000 | [diff] [blame] | 62 | #include <asm/mpic.h> |
Stephen Rothwell | d387899 | 2005-09-28 02:50:25 +1000 | [diff] [blame] | 63 | #include <asm/ppc-pci.h> |
Paul Mackerras | 69a80d3 | 2005-10-10 22:03:41 +1000 | [diff] [blame] | 64 | #include <asm/i8259.h> |
| 65 | #include <asm/udbg.h> |
Paul Mackerras | 2249ca9 | 2005-11-07 13:18:13 +1100 | [diff] [blame] | 66 | #include <asm/smp.h> |
Michael Ellerman | 577830b | 2007-02-08 18:33:51 +1100 | [diff] [blame] | 67 | #include <asm/firmware.h> |
Stephen Rothwell | bed5927 | 2007-03-04 17:04:44 +1100 | [diff] [blame] | 68 | #include <asm/eeh.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" |
Michael Ellerman | 577830b | 2007-02-08 18:33:51 +1100 | [diff] [blame] | 71 | #include "pseries.h" |
Michael Ellerman | a121872 | 2005-11-03 15:33:31 +1100 | [diff] [blame] | 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | #ifdef DEBUG |
| 74 | #define DBG(fmt...) udbg_printf(fmt) |
| 75 | #else |
| 76 | #define DBG(fmt...) |
| 77 | #endif |
| 78 | |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 79 | /* move those away to a .h */ |
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 | |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 87 | static struct device_node *pSeries_mpic_node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 122 | void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc) |
Benjamin Herrenschmidt | b9e5b4e | 2006-07-03 19:32:51 +1000 | [diff] [blame] | 123 | { |
Olaf Hering | 35a84c2 | 2006-10-07 22:08:26 +1000 | [diff] [blame] | 124 | unsigned int cascade_irq = i8259_irq(); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 125 | if (cascade_irq != NO_IRQ) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 126 | generic_handle_irq(cascade_irq); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 127 | desc->chip->eoi(irq); |
Benjamin Herrenschmidt | b9e5b4e | 2006-07-03 19:32:51 +1000 | [diff] [blame] | 128 | } |
| 129 | |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 130 | static void __init pseries_mpic_init_IRQ(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | { |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 132 | struct device_node *np, *old, *cascade = NULL; |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 133 | const unsigned int *addrp; |
Paul Mackerras | f9bd170 | 2005-10-26 16:47:42 +1000 | [diff] [blame] | 134 | unsigned long intack = 0; |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 135 | const unsigned int *opprop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | unsigned long openpic_addr = 0; |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 137 | unsigned int cascade_irq; |
| 138 | int naddr, n, i, opplen; |
| 139 | struct mpic *mpic; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 141 | np = of_find_node_by_path("/"); |
Stephen Rothwell | a8bda5d | 2007-04-03 10:56:50 +1000 | [diff] [blame^] | 142 | naddr = of_n_addr_cells(np); |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 143 | opprop = get_property(np, "platform-open-pic", &opplen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | if (opprop != 0) { |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 145 | openpic_addr = of_read_number(opprop, naddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr); |
| 147 | } |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 148 | of_node_put(np); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
| 150 | BUG_ON(openpic_addr == 0); |
| 151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | /* Setup the openpic driver */ |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 153 | mpic = mpic_alloc(pSeries_mpic_node, openpic_addr, |
| 154 | MPIC_PRIMARY, |
| 155 | 16, 250, /* isu size, irq count */ |
| 156 | " MPIC "); |
| 157 | BUG_ON(mpic == NULL); |
| 158 | |
| 159 | /* Add ISUs */ |
| 160 | opplen /= sizeof(u32); |
| 161 | for (n = 0, i = naddr; i < opplen; i += naddr, n++) { |
| 162 | unsigned long isuaddr = of_read_number(opprop + i, naddr); |
| 163 | mpic_assign_isu(mpic, n, isuaddr); |
| 164 | } |
| 165 | |
| 166 | /* All ISUs are setup, complete initialization */ |
| 167 | mpic_init(mpic); |
| 168 | |
| 169 | /* Look for cascade */ |
| 170 | for_each_node_by_type(np, "interrupt-controller") |
| 171 | if (device_is_compatible(np, "chrp,iic")) { |
| 172 | cascade = np; |
| 173 | break; |
| 174 | } |
| 175 | if (cascade == NULL) |
| 176 | return; |
| 177 | |
| 178 | cascade_irq = irq_of_parse_and_map(cascade, 0); |
| 179 | if (cascade == NO_IRQ) { |
Michael Ellerman | 586da2c | 2006-10-03 14:48:43 +1000 | [diff] [blame] | 180 | printk(KERN_ERR "mpic: failed to map cascade interrupt"); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 181 | return; |
| 182 | } |
| 183 | |
| 184 | /* Check ACK type */ |
| 185 | for (old = of_node_get(cascade); old != NULL ; old = np) { |
| 186 | np = of_get_parent(old); |
| 187 | of_node_put(old); |
| 188 | if (np == NULL) |
| 189 | break; |
| 190 | if (strcmp(np->name, "pci") != 0) |
| 191 | continue; |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 192 | addrp = get_property(np, "8259-interrupt-acknowledge", |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 193 | NULL); |
| 194 | if (addrp == NULL) |
| 195 | continue; |
Stephen Rothwell | a8bda5d | 2007-04-03 10:56:50 +1000 | [diff] [blame^] | 196 | naddr = of_n_addr_cells(np); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 197 | intack = addrp[naddr-1]; |
| 198 | if (naddr > 1) |
| 199 | intack |= ((unsigned long)addrp[naddr-2]) << 32; |
| 200 | } |
| 201 | if (intack) |
| 202 | printk(KERN_DEBUG "mpic: PCI 8259 intack at 0x%016lx\n", |
| 203 | intack); |
| 204 | i8259_init(cascade, intack); |
| 205 | of_node_put(cascade); |
| 206 | set_irq_chained_handler(cascade_irq, pseries_8259_cascade); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | } |
| 208 | |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 209 | static void pseries_lpar_enable_pmcs(void) |
| 210 | { |
| 211 | unsigned long set, reset; |
| 212 | |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 213 | set = 1UL << 63; |
| 214 | reset = 0; |
| 215 | plpar_hcall_norets(H_PERFMON, set, reset); |
| 216 | |
| 217 | /* instruct hypervisor to maintain PMCs */ |
| 218 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) |
David Gibson | 3356bb9 | 2006-01-13 10:26:42 +1100 | [diff] [blame] | 219 | get_lppaca()->pmcregs_in_use = 1; |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 220 | } |
| 221 | |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 222 | static void __init pseries_discover_pic(void) |
| 223 | { |
| 224 | struct device_node *np; |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 225 | const char *typep; |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 226 | |
| 227 | for (np = NULL; (np = of_find_node_by_name(np, |
| 228 | "interrupt-controller"));) { |
Jeremy Kerr | 954a46e | 2006-07-12 15:39:43 +1000 | [diff] [blame] | 229 | typep = get_property(np, "compatible", NULL); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 230 | if (strstr(typep, "open-pic")) { |
| 231 | pSeries_mpic_node = of_node_get(np); |
| 232 | ppc_md.init_IRQ = pseries_mpic_init_IRQ; |
| 233 | ppc_md.get_irq = mpic_get_irq; |
Michael Ellerman | dce623e | 2007-02-08 18:33:55 +1100 | [diff] [blame] | 234 | setup_kexec_cpu_down_mpic(); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 235 | smp_init_pseries_mpic(); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 236 | return; |
| 237 | } else if (strstr(typep, "ppc-xicp")) { |
| 238 | ppc_md.init_IRQ = xics_init_IRQ; |
Michael Ellerman | dce623e | 2007-02-08 18:33:55 +1100 | [diff] [blame] | 239 | setup_kexec_cpu_down_xics(); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 240 | smp_init_pseries_xics(); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 241 | return; |
| 242 | } |
| 243 | } |
| 244 | printk(KERN_ERR "pSeries_discover_pic: failed to recognize" |
| 245 | " interrupt-controller\n"); |
| 246 | } |
| 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | static void __init pSeries_setup_arch(void) |
| 249 | { |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 250 | /* Discover PIC type and setup ppc_md accordingly */ |
| 251 | pseries_discover_pic(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | /* openpic global configuration register (64-bit format). */ |
| 254 | /* openpic Interrupt Source Unit pointer (64-bit format). */ |
| 255 | /* python0 facility area (mmio) (64-bit format) REAL address. */ |
| 256 | |
| 257 | /* init to some ~sane value until calibrate_delay() runs */ |
| 258 | loops_per_jiffy = 50000000; |
| 259 | |
| 260 | if (ROOT_DEV == 0) { |
| 261 | printk("No ramdisk, default root is /dev/sda2\n"); |
| 262 | ROOT_DEV = Root_SDA2; |
| 263 | } |
| 264 | |
| 265 | fwnmi_init(); |
| 266 | |
| 267 | /* Find and initialize PCI host bridges */ |
| 268 | init_pci_config_tokens(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | find_and_init_phbs(); |
Paul Mackerras | 0160f53 | 2005-09-13 20:56:20 +1000 | [diff] [blame] | 270 | eeh_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | pSeries_nvram_init(); |
| 273 | |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 274 | /* Choose an idle loop */ |
Stephen Rothwell | 1ababe1 | 2005-08-03 14:35:25 +1000 | [diff] [blame] | 275 | if (firmware_has_feature(FW_FEATURE_SPLPAR)) { |
Stephen Rothwell | 8d15a3e | 2005-08-03 14:40:16 +1000 | [diff] [blame] | 276 | vpa_init(boot_cpuid); |
David Gibson | 3356bb9 | 2006-01-13 10:26:42 +1100 | [diff] [blame] | 277 | if (get_lppaca()->shared_proc) { |
Olof Johansson | 4baaf0c | 2006-04-12 15:23:22 -0500 | [diff] [blame] | 278 | printk(KERN_DEBUG "Using shared processor idle loop\n"); |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 279 | ppc_md.power_save = pseries_shared_idle_sleep; |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 280 | } else { |
Olof Johansson | 4baaf0c | 2006-04-12 15:23:22 -0500 | [diff] [blame] | 281 | printk(KERN_DEBUG "Using dedicated idle loop\n"); |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 282 | ppc_md.power_save = pseries_dedicated_idle_sleep; |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 283 | } |
| 284 | } else { |
Olof Johansson | 4baaf0c | 2006-04-12 15:23:22 -0500 | [diff] [blame] | 285 | printk(KERN_DEBUG "Using default idle loop\n"); |
Michael Ellerman | 62d60e9 | 2005-07-07 17:56:30 -0700 | [diff] [blame] | 286 | } |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 287 | |
Michael Ellerman | 57cfb81 | 2006-03-21 20:45:59 +1100 | [diff] [blame] | 288 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
Michael Ellerman | 180a336 | 2005-08-09 11:13:36 +1000 | [diff] [blame] | 289 | ppc_md.enable_pmcs = pseries_lpar_enable_pmcs; |
| 290 | else |
| 291 | ppc_md.enable_pmcs = power4_enable_pmcs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | } |
| 293 | |
| 294 | static int __init pSeries_init_panel(void) |
| 295 | { |
| 296 | /* Manually leave the kernel version on the panel. */ |
| 297 | ppc_md.progress("Linux ppc64\n", 0); |
Serge E. Hallyn | 96b644b | 2006-10-02 02:18:13 -0700 | [diff] [blame] | 298 | ppc_md.progress(init_utsname()->version, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
| 300 | return 0; |
| 301 | } |
| 302 | arch_initcall(pSeries_init_panel); |
| 303 | |
Michael Ellerman | cab0af9 | 2005-11-03 15:30:49 +1100 | [diff] [blame] | 304 | static int pseries_set_dabr(unsigned long dabr) |
| 305 | { |
Michael Ellerman | 76032de | 2005-11-07 13:12:03 +1100 | [diff] [blame] | 306 | return plpar_hcall_norets(H_SET_DABR, dabr); |
Michael Ellerman | cab0af9 | 2005-11-03 15:30:49 +1100 | [diff] [blame] | 307 | } |
| 308 | |
Michael Ellerman | 76032de | 2005-11-07 13:12:03 +1100 | [diff] [blame] | 309 | static int pseries_set_xdabr(unsigned long dabr) |
| 310 | { |
| 311 | /* We want to catch accesses from kernel and userspace */ |
| 312 | return plpar_hcall_norets(H_SET_XDABR, dabr, |
| 313 | H_DABRX_KERNEL | H_DABRX_USER); |
| 314 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
| 316 | /* |
| 317 | * Early initialization. Relocation is on but do not reference unbolted pages |
| 318 | */ |
| 319 | static void __init pSeries_init_early(void) |
| 320 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | DBG(" -> pSeries_init_early()\n"); |
| 322 | |
| 323 | fw_feature_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | |
Michael Ellerman | 57cfb81 | 2006-03-21 20:45:59 +1100 | [diff] [blame] | 325 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | find_udbg_vterm(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
Michael Ellerman | 76032de | 2005-11-07 13:12:03 +1100 | [diff] [blame] | 328 | if (firmware_has_feature(FW_FEATURE_DABR)) |
Michael Ellerman | cab0af9 | 2005-11-03 15:30:49 +1100 | [diff] [blame] | 329 | ppc_md.set_dabr = pseries_set_dabr; |
Michael Ellerman | 76032de | 2005-11-07 13:12:03 +1100 | [diff] [blame] | 330 | else if (firmware_has_feature(FW_FEATURE_XDABR)) |
| 331 | ppc_md.set_dabr = pseries_set_xdabr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
| 333 | iommu_init_early_pSeries(); |
| 334 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | DBG(" <- pSeries_init_early()\n"); |
| 336 | } |
| 337 | |
| 338 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | static int pSeries_check_legacy_ioport(unsigned int baseport) |
| 340 | { |
| 341 | struct device_node *np; |
| 342 | |
| 343 | #define I8042_DATA_REG 0x60 |
| 344 | #define FDC_BASE 0x3f0 |
| 345 | |
| 346 | |
| 347 | switch(baseport) { |
| 348 | case I8042_DATA_REG: |
| 349 | np = of_find_node_by_type(NULL, "8042"); |
| 350 | if (np == NULL) |
| 351 | return -ENODEV; |
| 352 | of_node_put(np); |
| 353 | break; |
| 354 | case FDC_BASE: |
| 355 | np = of_find_node_by_type(NULL, "fdc"); |
| 356 | if (np == NULL) |
| 357 | return -ENODEV; |
| 358 | of_node_put(np); |
| 359 | break; |
| 360 | } |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | /* |
| 365 | * Called very early, MMU is off, device-tree isn't unflattened |
| 366 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 368 | static int __init pSeries_probe_hypertas(unsigned long node, |
| 369 | const char *uname, int depth, |
| 370 | void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | { |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 372 | if (depth != 1 || |
| 373 | (strcmp(uname, "rtas") != 0 && strcmp(uname, "rtas@0") != 0)) |
| 374 | return 0; |
| 375 | |
| 376 | if (of_get_flat_dt_prop(node, "ibm,hypertas-functions", NULL) != NULL) |
| 377 | powerpc_firmware_features |= FW_FEATURE_LPAR; |
| 378 | |
| 379 | return 1; |
| 380 | } |
| 381 | |
| 382 | static int __init pSeries_probe(void) |
| 383 | { |
Arnd Bergmann | 133dda1 | 2006-06-07 12:04:18 +1000 | [diff] [blame] | 384 | unsigned long root = of_get_flat_dt_root(); |
Anton Blanchard | 5773bbc | 2006-12-08 18:08:37 +1100 | [diff] [blame] | 385 | char *dtype = of_get_flat_dt_prop(root, "device_type", NULL); |
| 386 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 387 | if (dtype == NULL) |
| 388 | return 0; |
| 389 | if (strcmp(dtype, "chrp")) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | return 0; |
| 391 | |
Arnd Bergmann | 133dda1 | 2006-06-07 12:04:18 +1000 | [diff] [blame] | 392 | /* Cell blades firmware claims to be chrp while it's not. Until this |
| 393 | * is fixed, we need to avoid those here. |
| 394 | */ |
| 395 | if (of_flat_dt_is_compatible(root, "IBM,CPBW-1.0") || |
| 396 | of_flat_dt_is_compatible(root, "IBM,CBEA")) |
| 397 | return 0; |
| 398 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 399 | DBG("pSeries detected, looking for LPAR capability...\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 401 | /* Now try to figure out if we are running on LPAR */ |
| 402 | of_scan_flat_dt(pSeries_probe_hypertas, NULL); |
| 403 | |
Anton Blanchard | a223535 | 2006-12-08 18:22:09 +1100 | [diff] [blame] | 404 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
| 405 | hpte_init_lpar(); |
| 406 | else |
| 407 | hpte_init_native(); |
| 408 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 409 | DBG("Machine is%s LPAR !\n", |
| 410 | (powerpc_firmware_features & FW_FEATURE_LPAR) ? "" : " not"); |
Michael Ellerman | 57cfb81 | 2006-03-21 20:45:59 +1100 | [diff] [blame] | 411 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | return 1; |
| 413 | } |
| 414 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 415 | |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 416 | DECLARE_PER_CPU(unsigned long, smt_snooze_delay); |
| 417 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 418 | static void pseries_dedicated_idle_sleep(void) |
Paul Mackerras | 143a1de | 2005-10-19 23:11:21 +1000 | [diff] [blame] | 419 | { |
Anton Blanchard | 050a093 | 2005-07-07 17:56:33 -0700 | [diff] [blame] | 420 | unsigned int cpu = smp_processor_id(); |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 421 | unsigned long start_snooze; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 422 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 423 | /* |
| 424 | * Indicate to the HV that we are idle. Now would be |
| 425 | * a good time to find other work to dispatch. |
| 426 | */ |
| 427 | get_lppaca()->idle = 1; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 428 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 429 | /* |
| 430 | * We come in with interrupts disabled, and need_resched() |
| 431 | * has been checked recently. If we should poll for a little |
| 432 | * while, do so. |
| 433 | */ |
Anton Blanchard | 0ddd3e7 | 2006-09-22 20:30:14 +1000 | [diff] [blame] | 434 | if (__get_cpu_var(smt_snooze_delay)) { |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 435 | start_snooze = get_tb() + |
Anton Blanchard | 0ddd3e7 | 2006-09-22 20:30:14 +1000 | [diff] [blame] | 436 | __get_cpu_var(smt_snooze_delay) * tb_ticks_per_usec; |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 437 | local_irq_enable(); |
| 438 | set_thread_flag(TIF_POLLING_NRFLAG); |
Anton Blanchard | 050a093 | 2005-07-07 17:56:33 -0700 | [diff] [blame] | 439 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 440 | while (get_tb() < start_snooze) { |
| 441 | if (need_resched() || cpu_is_offline(cpu)) |
| 442 | goto out; |
| 443 | ppc64_runlatch_off(); |
| 444 | HMT_low(); |
| 445 | HMT_very_low(); |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 446 | } |
| 447 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 448 | HMT_medium(); |
| 449 | clear_thread_flag(TIF_POLLING_NRFLAG); |
| 450 | smp_mb(); |
| 451 | local_irq_disable(); |
| 452 | if (need_resched() || cpu_is_offline(cpu)) |
| 453 | goto out; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 454 | } |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 455 | |
Anton Blanchard | 0ddd3e7 | 2006-09-22 20:30:14 +1000 | [diff] [blame] | 456 | cede_processor(); |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 457 | |
| 458 | out: |
| 459 | HMT_medium(); |
| 460 | get_lppaca()->idle = 0; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 461 | } |
| 462 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 463 | static void pseries_shared_idle_sleep(void) |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 464 | { |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 465 | /* |
| 466 | * Indicate to the HV that we are idle. Now would be |
| 467 | * a good time to find other work to dispatch. |
| 468 | */ |
| 469 | get_lppaca()->idle = 1; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 470 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 471 | /* |
| 472 | * Yield the processor to the hypervisor. We return if |
| 473 | * an external interrupt occurs (which are driven prior |
| 474 | * to returning here) or if a prod occurs from another |
| 475 | * processor. When returning here, external interrupts |
| 476 | * are enabled. |
| 477 | */ |
| 478 | cede_processor(); |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 479 | |
Paul Mackerras | fbd7740 | 2006-03-27 15:06:20 +1100 | [diff] [blame] | 480 | get_lppaca()->idle = 0; |
Michael Ellerman | c66d5dd | 2005-07-07 17:56:29 -0700 | [diff] [blame] | 481 | } |
| 482 | |
Paul Mackerras | 4267292 | 2005-09-12 17:17:36 +1000 | [diff] [blame] | 483 | static int pSeries_pci_probe_mode(struct pci_bus *bus) |
| 484 | { |
Michael Ellerman | 57cfb81 | 2006-03-21 20:45:59 +1100 | [diff] [blame] | 485 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
Paul Mackerras | 4267292 | 2005-09-12 17:17:36 +1000 | [diff] [blame] | 486 | return PCI_PROBE_DEVTREE; |
| 487 | return PCI_PROBE_NORMAL; |
| 488 | } |
| 489 | |
Manish Ahuja | 5d30bf3 | 2007-02-08 16:01:17 -0600 | [diff] [blame] | 490 | /** |
| 491 | * pSeries_power_off - tell firmware about how to power off the system. |
| 492 | * |
| 493 | * This function calls either the power-off rtas token in normal cases |
| 494 | * or the ibm,power-off-ups token (if present & requested) in case of |
| 495 | * a power failure. If power-off token is used, power on will only be |
| 496 | * possible with power button press. If ibm,power-off-ups token is used |
| 497 | * it will allow auto poweron after power is restored. |
| 498 | */ |
| 499 | void pSeries_power_off(void) |
| 500 | { |
| 501 | int rc; |
| 502 | int rtas_poweroff_ups_token = rtas_token("ibm,power-off-ups"); |
| 503 | |
| 504 | if (rtas_flash_term_hook) |
| 505 | rtas_flash_term_hook(SYS_POWER_OFF); |
| 506 | |
| 507 | if (rtas_poweron_auto == 0 || |
| 508 | rtas_poweroff_ups_token == RTAS_UNKNOWN_SERVICE) { |
| 509 | rc = rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1); |
| 510 | printk(KERN_INFO "RTAS power-off returned %d\n", rc); |
| 511 | } else { |
| 512 | rc = rtas_call(rtas_poweroff_ups_token, 0, 1, NULL); |
| 513 | printk(KERN_INFO "RTAS ibm,power-off-ups returned %d\n", rc); |
| 514 | } |
| 515 | for (;;); |
| 516 | } |
| 517 | |
Stephen Rothwell | bed5927 | 2007-03-04 17:04:44 +1100 | [diff] [blame] | 518 | #ifndef CONFIG_PCI |
| 519 | void pSeries_final_fixup(void) { } |
| 520 | #endif |
| 521 | |
Benjamin Herrenschmidt | e822250 | 2006-03-28 23:15:54 +1100 | [diff] [blame] | 522 | define_machine(pseries) { |
| 523 | .name = "pSeries", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | .probe = pSeries_probe, |
| 525 | .setup_arch = pSeries_setup_arch, |
| 526 | .init_early = pSeries_init_early, |
Paul Mackerras | 0dd194d | 2005-10-20 20:48:19 +1000 | [diff] [blame] | 527 | .show_cpuinfo = pSeries_show_cpuinfo, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | .log_error = pSeries_log_error, |
| 529 | .pcibios_fixup = pSeries_final_fixup, |
Paul Mackerras | 4267292 | 2005-09-12 17:17:36 +1000 | [diff] [blame] | 530 | .pci_probe_mode = pSeries_pci_probe_mode, |
Paul Mackerras | f4fcbbe | 2005-11-03 14:41:19 +1100 | [diff] [blame] | 531 | .restart = rtas_restart, |
Manish Ahuja | 5d30bf3 | 2007-02-08 16:01:17 -0600 | [diff] [blame] | 532 | .power_off = pSeries_power_off, |
Paul Mackerras | f4fcbbe | 2005-11-03 14:41:19 +1100 | [diff] [blame] | 533 | .halt = rtas_halt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | .panic = rtas_os_term, |
Arnd Bergmann | 773bf9c | 2005-06-23 09:43:18 +1000 | [diff] [blame] | 535 | .get_boot_time = rtas_get_boot_time, |
| 536 | .get_rtc_time = rtas_get_rtc_time, |
| 537 | .set_rtc_time = rtas_set_rtc_time, |
Arnd Bergmann | 10f7e7c | 2005-06-23 09:43:07 +1000 | [diff] [blame] | 538 | .calibrate_decr = generic_calibrate_decr, |
Arnd Bergmann | 6566c6f | 2005-06-23 09:43:28 +1000 | [diff] [blame] | 539 | .progress = rtas_progress, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | .check_legacy_ioport = pSeries_check_legacy_ioport, |
| 541 | .system_reset_exception = pSeries_system_reset_exception, |
| 542 | .machine_check_exception = pSeries_machine_check_exception, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | }; |