3 #include <linux/types.h>
4 #include <linux/kernel.h>
6 #include <linux/reboot.h>
11 #include <asm/machdep.h>
18 static void dump_fir(int cpu)
20 struct cbe_pmd_regs __iomem *pregs = cbe_get_cpu_pmd_regs(cpu);
21 struct cbe_iic_regs __iomem *iregs = cbe_get_cpu_iic_regs(cpu);
26 /* Todo: do some nicer parsing of bits and based on them go down
27 * to other sub-units FIRs and not only IIC
29 printk(KERN_ERR "Global Checkstop FIR : 0x%016lx\n",
30 in_be64(&pregs->checkstop_fir));
31 printk(KERN_ERR "Global Recoverable FIR : 0x%016lx\n",
32 in_be64(&pregs->checkstop_fir));
33 printk(KERN_ERR "Global MachineCheck FIR : 0x%016lx\n",
34 in_be64(&pregs->spec_att_mchk_fir));
38 printk(KERN_ERR "IOC FIR : 0x%016lx\n",
39 in_be64(&iregs->ioc_fir));
43 void cbe_system_error_exception(struct pt_regs *regs)
45 int cpu = smp_processor_id();
47 printk(KERN_ERR "System Error Interrupt on CPU %d !\n", cpu);
52 void cbe_maintenance_exception(struct pt_regs *regs)
54 int cpu = smp_processor_id();
57 * Nothing implemented for the maintenance interrupt at this point
60 printk(KERN_ERR "Unhandled Maintenance interrupt on CPU %d !\n", cpu);
64 void cbe_thermal_exception(struct pt_regs *regs)
66 int cpu = smp_processor_id();
69 * Nothing implemented for the thermal interrupt at this point
72 printk(KERN_ERR "Unhandled Thermal interrupt on CPU %d !\n", cpu);
76 static int cbe_machine_check_handler(struct pt_regs *regs)
78 int cpu = smp_processor_id();
80 printk(KERN_ERR "Machine Check Interrupt on CPU %d !\n", cpu);
83 /* No recovery from this code now, lets continue */
88 struct list_head list;
94 static LIST_HEAD(ptcal_list);
96 static int ptcal_start_tok, ptcal_stop_tok;
98 static int __init cbe_ptcal_enable_on_node(int nid, int order)
100 struct ptcal_area *area;
104 #ifdef CONFIG_CRASH_DUMP
105 rtas_call(ptcal_stop_tok, 1, 1, NULL, nid);
108 area = kmalloc(sizeof(*area), GFP_KERNEL);
114 area->pages = alloc_pages_node(area->nid, GFP_KERNEL, area->order);
119 addr = __pa(page_address(area->pages));
122 if (rtas_call(ptcal_start_tok, 3, 1, NULL, area->nid,
123 (unsigned int)(addr >> 32),
124 (unsigned int)(addr & 0xffffffff))) {
125 printk(KERN_ERR "%s: error enabling PTCAL on node %d!\n",
130 list_add(&area->list, &ptcal_list);
135 __free_pages(area->pages, area->order);
142 static int __init cbe_ptcal_enable(void)
145 struct device_node *np;
146 int order, found_mic = 0;
148 np = of_find_node_by_path("/rtas");
152 size = of_get_property(np, "ibm,cbe-ptcal-size", NULL);
156 pr_debug("%s: enabling PTCAL, size = 0x%x\n", __FUNCTION__, *size);
157 order = get_order(*size);
160 /* support for malta device trees, with be@/mic@ nodes */
161 for_each_node_by_type(np, "mic-tm") {
162 cbe_ptcal_enable_on_node(of_node_to_nid(np), order);
169 /* support for older device tree - use cpu nodes */
170 for_each_node_by_type(np, "cpu") {
171 const u32 *nid = of_get_property(np, "node-id", NULL);
173 printk(KERN_ERR "%s: node %s is missing node-id?\n",
174 __FUNCTION__, np->full_name);
177 cbe_ptcal_enable_on_node(*nid, order);
181 return found_mic ? 0 : -ENODEV;
184 static int cbe_ptcal_disable(void)
186 struct ptcal_area *area, *tmp;
189 pr_debug("%s: disabling PTCAL\n", __FUNCTION__);
191 list_for_each_entry_safe(area, tmp, &ptcal_list, list) {
192 /* disable ptcal on this node */
193 if (rtas_call(ptcal_stop_tok, 1, 1, NULL, area->nid)) {
194 printk(KERN_ERR "%s: error disabling PTCAL "
195 "on node %d!\n", __FUNCTION__,
201 /* ensure we can access the PTCAL area */
202 memset(page_address(area->pages), 0,
203 1 << (area->order + PAGE_SHIFT));
206 list_del(&area->list);
207 __free_pages(area->pages, area->order);
214 static int cbe_ptcal_notify_reboot(struct notifier_block *nb,
215 unsigned long code, void *data)
217 return cbe_ptcal_disable();
220 static struct notifier_block cbe_ptcal_reboot_notifier = {
221 .notifier_call = cbe_ptcal_notify_reboot
224 int __init cbe_ptcal_init(void)
227 ptcal_start_tok = rtas_token("ibm,cbe-start-ptcal");
228 ptcal_stop_tok = rtas_token("ibm,cbe-stop-ptcal");
230 if (ptcal_start_tok == RTAS_UNKNOWN_SERVICE
231 || ptcal_stop_tok == RTAS_UNKNOWN_SERVICE)
234 ret = register_reboot_notifier(&cbe_ptcal_reboot_notifier);
236 printk(KERN_ERR "Can't disable PTCAL, so not enabling\n");
240 return cbe_ptcal_enable();
243 arch_initcall(cbe_ptcal_init);
245 void __init cbe_ras_init(void)
250 * Enable System Error & thermal interrupts and wakeup conditions
253 hid0 = mfspr(SPRN_HID0);
254 hid0 |= HID0_CBE_THERM_INT_EN | HID0_CBE_THERM_WAKEUP |
255 HID0_CBE_SYSERR_INT_EN | HID0_CBE_SYSERR_WAKEUP;
256 mtspr(SPRN_HID0, hid0);
260 * Install machine check handler. Leave setting of precise mode to
261 * what the firmware did for now
263 ppc_md.machine_check_exception = cbe_machine_check_handler;
267 * For now, we assume that IOC_FIR is already set to forward some
268 * error conditions to the System Error handler. If that is not true
269 * then it will have to be fixed up here.