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/machdep.h>
22 #include <asm/cell-regs.h>
27 static void dump_fir(int cpu)
29 struct cbe_pmd_regs __iomem *pregs = cbe_get_cpu_pmd_regs(cpu);
30 struct cbe_iic_regs __iomem *iregs = cbe_get_cpu_iic_regs(cpu);
35 /* Todo: do some nicer parsing of bits and based on them go down
36 * to other sub-units FIRs and not only IIC
38 printk(KERN_ERR "Global Checkstop FIR : 0x%016lx\n",
39 in_be64(&pregs->checkstop_fir));
40 printk(KERN_ERR "Global Recoverable FIR : 0x%016lx\n",
41 in_be64(&pregs->checkstop_fir));
42 printk(KERN_ERR "Global MachineCheck FIR : 0x%016lx\n",
43 in_be64(&pregs->spec_att_mchk_fir));
47 printk(KERN_ERR "IOC FIR : 0x%016lx\n",
48 in_be64(&iregs->ioc_fir));
52 void cbe_system_error_exception(struct pt_regs *regs)
54 int cpu = smp_processor_id();
56 printk(KERN_ERR "System Error Interrupt on CPU %d !\n", cpu);
61 void cbe_maintenance_exception(struct pt_regs *regs)
63 int cpu = smp_processor_id();
66 * Nothing implemented for the maintenance interrupt at this point
69 printk(KERN_ERR "Unhandled Maintenance interrupt on CPU %d !\n", cpu);
73 void cbe_thermal_exception(struct pt_regs *regs)
75 int cpu = smp_processor_id();
78 * Nothing implemented for the thermal interrupt at this point
81 printk(KERN_ERR "Unhandled Thermal interrupt on CPU %d !\n", cpu);
85 static int cbe_machine_check_handler(struct pt_regs *regs)
87 int cpu = smp_processor_id();
89 printk(KERN_ERR "Machine Check Interrupt on CPU %d !\n", cpu);
92 /* No recovery from this code now, lets continue */
97 struct list_head list;
103 static LIST_HEAD(ptcal_list);
105 static int ptcal_start_tok, ptcal_stop_tok;
107 static int __init cbe_ptcal_enable_on_node(int nid, int order)
109 struct ptcal_area *area;
113 #ifdef CONFIG_CRASH_DUMP
114 rtas_call(ptcal_stop_tok, 1, 1, NULL, nid);
117 area = kmalloc(sizeof(*area), GFP_KERNEL);
123 area->pages = alloc_pages_node(area->nid, GFP_KERNEL, area->order);
128 addr = __pa(page_address(area->pages));
131 if (rtas_call(ptcal_start_tok, 3, 1, NULL, area->nid,
132 (unsigned int)(addr >> 32),
133 (unsigned int)(addr & 0xffffffff))) {
134 printk(KERN_ERR "%s: error enabling PTCAL on node %d!\n",
139 list_add(&area->list, &ptcal_list);
144 __free_pages(area->pages, area->order);
151 static int __init cbe_ptcal_enable(void)
154 struct device_node *np;
155 int order, found_mic = 0;
157 np = of_find_node_by_path("/rtas");
161 size = of_get_property(np, "ibm,cbe-ptcal-size", NULL);
165 pr_debug("%s: enabling PTCAL, size = 0x%x\n", __func__, *size);
166 order = get_order(*size);
169 /* support for malta device trees, with be@/mic@ nodes */
170 for_each_node_by_type(np, "mic-tm") {
171 cbe_ptcal_enable_on_node(of_node_to_nid(np), order);
178 /* support for older device tree - use cpu nodes */
179 for_each_node_by_type(np, "cpu") {
180 const u32 *nid = of_get_property(np, "node-id", NULL);
182 printk(KERN_ERR "%s: node %s is missing node-id?\n",
183 __func__, np->full_name);
186 cbe_ptcal_enable_on_node(*nid, order);
190 return found_mic ? 0 : -ENODEV;
193 static int cbe_ptcal_disable(void)
195 struct ptcal_area *area, *tmp;
198 pr_debug("%s: disabling PTCAL\n", __func__);
200 list_for_each_entry_safe(area, tmp, &ptcal_list, list) {
201 /* disable ptcal on this node */
202 if (rtas_call(ptcal_stop_tok, 1, 1, NULL, area->nid)) {
203 printk(KERN_ERR "%s: error disabling PTCAL "
204 "on node %d!\n", __func__,
210 /* ensure we can access the PTCAL area */
211 memset(page_address(area->pages), 0,
212 1 << (area->order + PAGE_SHIFT));
215 list_del(&area->list);
216 __free_pages(area->pages, area->order);
223 static int cbe_ptcal_notify_reboot(struct notifier_block *nb,
224 unsigned long code, void *data)
226 return cbe_ptcal_disable();
229 static struct notifier_block cbe_ptcal_reboot_notifier = {
230 .notifier_call = cbe_ptcal_notify_reboot
233 int __init cbe_ptcal_init(void)
236 ptcal_start_tok = rtas_token("ibm,cbe-start-ptcal");
237 ptcal_stop_tok = rtas_token("ibm,cbe-stop-ptcal");
239 if (ptcal_start_tok == RTAS_UNKNOWN_SERVICE
240 || ptcal_stop_tok == RTAS_UNKNOWN_SERVICE)
243 ret = register_reboot_notifier(&cbe_ptcal_reboot_notifier);
245 printk(KERN_ERR "Can't disable PTCAL, so not enabling\n");
249 return cbe_ptcal_enable();
252 arch_initcall(cbe_ptcal_init);
254 void __init cbe_ras_init(void)
259 * Enable System Error & thermal interrupts and wakeup conditions
262 hid0 = mfspr(SPRN_HID0);
263 hid0 |= HID0_CBE_THERM_INT_EN | HID0_CBE_THERM_WAKEUP |
264 HID0_CBE_SYSERR_INT_EN | HID0_CBE_SYSERR_WAKEUP;
265 mtspr(SPRN_HID0, hid0);
269 * Install machine check handler. Leave setting of precise mode to
270 * what the firmware did for now
272 ppc_md.machine_check_exception = cbe_machine_check_handler;
276 * For now, we assume that IOC_FIR is already set to forward some
277 * error conditions to the System Error handler. If that is not true
278 * then it will have to be fixed up here.