2 * Copyright 2006-2008, IBM Corporation.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
12 #include <linux/types.h>
13 #include <linux/kernel.h>
14 #include <linux/smp.h>
15 #include <linux/reboot.h>
20 #include <asm/kexec.h>
21 #include <asm/machdep.h>
23 #include <asm/cell-regs.h>
28 static void dump_fir(int cpu)
30 struct cbe_pmd_regs __iomem *pregs = cbe_get_cpu_pmd_regs(cpu);
31 struct cbe_iic_regs __iomem *iregs = cbe_get_cpu_iic_regs(cpu);
36 /* Todo: do some nicer parsing of bits and based on them go down
37 * to other sub-units FIRs and not only IIC
39 printk(KERN_ERR "Global Checkstop FIR : 0x%016lx\n",
40 in_be64(&pregs->checkstop_fir));
41 printk(KERN_ERR "Global Recoverable FIR : 0x%016lx\n",
42 in_be64(&pregs->checkstop_fir));
43 printk(KERN_ERR "Global MachineCheck FIR : 0x%016lx\n",
44 in_be64(&pregs->spec_att_mchk_fir));
48 printk(KERN_ERR "IOC FIR : 0x%016lx\n",
49 in_be64(&iregs->ioc_fir));
53 void cbe_system_error_exception(struct pt_regs *regs)
55 int cpu = smp_processor_id();
57 printk(KERN_ERR "System Error Interrupt on CPU %d !\n", cpu);
62 void cbe_maintenance_exception(struct pt_regs *regs)
64 int cpu = smp_processor_id();
67 * Nothing implemented for the maintenance interrupt at this point
70 printk(KERN_ERR "Unhandled Maintenance interrupt on CPU %d !\n", cpu);
74 void cbe_thermal_exception(struct pt_regs *regs)
76 int cpu = smp_processor_id();
79 * Nothing implemented for the thermal interrupt at this point
82 printk(KERN_ERR "Unhandled Thermal interrupt on CPU %d !\n", cpu);
86 static int cbe_machine_check_handler(struct pt_regs *regs)
88 int cpu = smp_processor_id();
90 printk(KERN_ERR "Machine Check Interrupt on CPU %d !\n", cpu);
93 /* No recovery from this code now, lets continue */
98 struct list_head list;
104 static LIST_HEAD(ptcal_list);
106 static int ptcal_start_tok, ptcal_stop_tok;
108 static int __init cbe_ptcal_enable_on_node(int nid, int order)
110 struct ptcal_area *area;
114 #ifdef CONFIG_CRASH_DUMP
115 rtas_call(ptcal_stop_tok, 1, 1, NULL, nid);
118 area = kmalloc(sizeof(*area), GFP_KERNEL);
124 area->pages = alloc_pages_node(area->nid, GFP_KERNEL, area->order);
129 addr = __pa(page_address(area->pages));
132 if (rtas_call(ptcal_start_tok, 3, 1, NULL, area->nid,
133 (unsigned int)(addr >> 32),
134 (unsigned int)(addr & 0xffffffff))) {
135 printk(KERN_ERR "%s: error enabling PTCAL on node %d!\n",
140 list_add(&area->list, &ptcal_list);
145 __free_pages(area->pages, area->order);
152 static int __init cbe_ptcal_enable(void)
155 struct device_node *np;
156 int order, found_mic = 0;
158 np = of_find_node_by_path("/rtas");
162 size = of_get_property(np, "ibm,cbe-ptcal-size", NULL);
166 pr_debug("%s: enabling PTCAL, size = 0x%x\n", __func__, *size);
167 order = get_order(*size);
170 /* support for malta device trees, with be@/mic@ nodes */
171 for_each_node_by_type(np, "mic-tm") {
172 cbe_ptcal_enable_on_node(of_node_to_nid(np), order);
179 /* support for older device tree - use cpu nodes */
180 for_each_node_by_type(np, "cpu") {
181 const u32 *nid = of_get_property(np, "node-id", NULL);
183 printk(KERN_ERR "%s: node %s is missing node-id?\n",
184 __func__, np->full_name);
187 cbe_ptcal_enable_on_node(*nid, order);
191 return found_mic ? 0 : -ENODEV;
194 static int cbe_ptcal_disable(void)
196 struct ptcal_area *area, *tmp;
199 pr_debug("%s: disabling PTCAL\n", __func__);
201 list_for_each_entry_safe(area, tmp, &ptcal_list, list) {
202 /* disable ptcal on this node */
203 if (rtas_call(ptcal_stop_tok, 1, 1, NULL, area->nid)) {
204 printk(KERN_ERR "%s: error disabling PTCAL "
205 "on node %d!\n", __func__,
211 /* ensure we can access the PTCAL area */
212 memset(page_address(area->pages), 0,
213 1 << (area->order + PAGE_SHIFT));
216 list_del(&area->list);
217 __free_pages(area->pages, area->order);
224 static int cbe_ptcal_notify_reboot(struct notifier_block *nb,
225 unsigned long code, void *data)
227 return cbe_ptcal_disable();
230 static void cbe_ptcal_crash_shutdown(void)
235 static struct notifier_block cbe_ptcal_reboot_notifier = {
236 .notifier_call = cbe_ptcal_notify_reboot
239 int __init cbe_ptcal_init(void)
242 ptcal_start_tok = rtas_token("ibm,cbe-start-ptcal");
243 ptcal_stop_tok = rtas_token("ibm,cbe-stop-ptcal");
245 if (ptcal_start_tok == RTAS_UNKNOWN_SERVICE
246 || ptcal_stop_tok == RTAS_UNKNOWN_SERVICE)
249 ret = register_reboot_notifier(&cbe_ptcal_reboot_notifier);
253 ret = crash_shutdown_register(&cbe_ptcal_crash_shutdown);
257 return cbe_ptcal_enable();
260 unregister_reboot_notifier(&cbe_ptcal_reboot_notifier);
262 printk(KERN_ERR "Can't disable PTCAL, so not enabling\n");
266 arch_initcall(cbe_ptcal_init);
268 void __init cbe_ras_init(void)
273 * Enable System Error & thermal interrupts and wakeup conditions
276 hid0 = mfspr(SPRN_HID0);
277 hid0 |= HID0_CBE_THERM_INT_EN | HID0_CBE_THERM_WAKEUP |
278 HID0_CBE_SYSERR_INT_EN | HID0_CBE_SYSERR_WAKEUP;
279 mtspr(SPRN_HID0, hid0);
283 * Install machine check handler. Leave setting of precise mode to
284 * what the firmware did for now
286 ppc_md.machine_check_exception = cbe_machine_check_handler;
290 * For now, we assume that IOC_FIR is already set to forward some
291 * error conditions to the System Error handler. If that is not true
292 * then it will have to be fixed up here.