Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6] / arch / powerpc / platforms / pasemi / setup.c
1 /*
2  * Copyright (C) 2006-2007 PA Semi, Inc
3  *
4  * Authors: Kip Walker, PA Semi
5  *          Olof Johansson, PA Semi
6  *
7  * Maintained by: Olof Johansson <olof@lixom.net>
8  *
9  * Based on arch/powerpc/platforms/maple/setup.c
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License version 2 as
13  * published by the Free Software Foundation.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
23  */
24
25 #include <linux/errno.h>
26 #include <linux/kernel.h>
27 #include <linux/delay.h>
28 #include <linux/console.h>
29 #include <linux/pci.h>
30
31 #include <asm/prom.h>
32 #include <asm/system.h>
33 #include <asm/iommu.h>
34 #include <asm/machdep.h>
35 #include <asm/mpic.h>
36 #include <asm/smp.h>
37 #include <asm/time.h>
38 #include <asm/of_platform.h>
39
40 #include "pasemi.h"
41
42 static void __iomem *reset_reg;
43
44 static void pas_restart(char *cmd)
45 {
46         printk("Restarting...\n");
47         while (1)
48                 out_le32(reset_reg, 0x6000000);
49 }
50
51 #ifdef CONFIG_SMP
52 static DEFINE_SPINLOCK(timebase_lock);
53
54 static void __devinit pas_give_timebase(void)
55 {
56         unsigned long tb;
57
58         spin_lock(&timebase_lock);
59         mtspr(SPRN_TBCTL, TBCTL_FREEZE);
60         tb = mftb();
61         mtspr(SPRN_TBCTL, TBCTL_UPDATE_LOWER | (tb & 0xffffffff));
62         mtspr(SPRN_TBCTL, TBCTL_UPDATE_UPPER | (tb >> 32));
63         mtspr(SPRN_TBCTL, TBCTL_RESTART);
64         spin_unlock(&timebase_lock);
65         pr_debug("pas_give_timebase: cpu %d gave tb %lx\n",
66                  smp_processor_id(), tb);
67 }
68
69 static void __devinit pas_take_timebase(void)
70 {
71         pr_debug("pas_take_timebase: cpu %d has tb %lx\n",
72                  smp_processor_id(), mftb());
73 }
74
75 struct smp_ops_t pas_smp_ops = {
76         .probe          = smp_mpic_probe,
77         .message_pass   = smp_mpic_message_pass,
78         .kick_cpu       = smp_generic_kick_cpu,
79         .setup_cpu      = smp_mpic_setup_cpu,
80         .give_timebase  = pas_give_timebase,
81         .take_timebase  = pas_take_timebase,
82 };
83 #endif /* CONFIG_SMP */
84
85 void __init pas_setup_arch(void)
86 {
87 #ifdef CONFIG_SMP
88         /* Setup SMP callback */
89         smp_ops = &pas_smp_ops;
90 #endif
91         /* Lookup PCI hosts */
92         pas_pci_init();
93
94 #ifdef CONFIG_DUMMY_CONSOLE
95         conswitchp = &dummy_con;
96 #endif
97
98         /* Remap SDC register for doing reset */
99         /* XXXOJN This should maybe come out of the device tree */
100         reset_reg = ioremap(0xfc101100, 4);
101
102         pasemi_idle_init();
103 }
104
105 static __init void pas_init_IRQ(void)
106 {
107         struct device_node *np;
108         struct device_node *root, *mpic_node;
109         unsigned long openpic_addr;
110         const unsigned int *opprop;
111         int naddr, opplen;
112         struct mpic *mpic;
113
114         mpic_node = NULL;
115
116         for_each_node_by_type(np, "interrupt-controller")
117                 if (of_device_is_compatible(np, "open-pic")) {
118                         mpic_node = np;
119                         break;
120                 }
121         if (!mpic_node)
122                 for_each_node_by_type(np, "open-pic") {
123                         mpic_node = np;
124                         break;
125                 }
126         if (!mpic_node) {
127                 printk(KERN_ERR
128                         "Failed to locate the MPIC interrupt controller\n");
129                 return;
130         }
131
132         /* Find address list in /platform-open-pic */
133         root = of_find_node_by_path("/");
134         naddr = of_n_addr_cells(root);
135         opprop = of_get_property(root, "platform-open-pic", &opplen);
136         if (!opprop) {
137                 printk(KERN_ERR "No platform-open-pic property.\n");
138                 of_node_put(root);
139                 return;
140         }
141         openpic_addr = of_read_number(opprop, naddr);
142         printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
143
144         mpic = mpic_alloc(mpic_node, openpic_addr,
145                           MPIC_PRIMARY|MPIC_LARGE_VECTORS|MPIC_WANTS_RESET,
146                           0, 0, " PAS-OPIC  ");
147         BUG_ON(!mpic);
148
149         mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
150         mpic_init(mpic);
151         of_node_put(mpic_node);
152         of_node_put(root);
153 }
154
155 static void __init pas_progress(char *s, unsigned short hex)
156 {
157         printk("[%04x] : %s\n", hex, s ? s : "");
158 }
159
160
161 static int pas_machine_check_handler(struct pt_regs *regs)
162 {
163         int cpu = smp_processor_id();
164         unsigned long srr0, srr1, dsisr;
165
166         srr0 = regs->nip;
167         srr1 = regs->msr;
168         dsisr = mfspr(SPRN_DSISR);
169         printk(KERN_ERR "Machine Check on CPU %d\n", cpu);
170         printk(KERN_ERR "SRR0 0x%016lx SRR1 0x%016lx\n", srr0, srr1);
171         printk(KERN_ERR "DSISR 0x%016lx DAR 0x%016lx\n", dsisr, regs->dar);
172         printk(KERN_ERR "Cause:\n");
173
174         if (srr1 & 0x200000)
175                 printk(KERN_ERR "Signalled by SDC\n");
176         if (srr1 & 0x100000) {
177                 printk(KERN_ERR "Load/Store detected error:\n");
178                 if (dsisr & 0x8000)
179                         printk(KERN_ERR "D-cache ECC double-bit error or bus error\n");
180                 if (dsisr & 0x4000)
181                         printk(KERN_ERR "LSU snoop response error\n");
182                 if (dsisr & 0x2000)
183                         printk(KERN_ERR "MMU SLB multi-hit or invalid B field\n");
184                 if (dsisr & 0x1000)
185                         printk(KERN_ERR "Recoverable Duptags\n");
186                 if (dsisr & 0x800)
187                         printk(KERN_ERR "Recoverable D-cache parity error count overflow\n");
188                 if (dsisr & 0x400)
189                         printk(KERN_ERR "TLB parity error count overflow\n");
190         }
191         if (srr1 & 0x80000)
192                 printk(KERN_ERR "Bus Error\n");
193         if (srr1 & 0x40000)
194                 printk(KERN_ERR "I-side SLB multiple hit\n");
195         if (srr1 & 0x20000)
196                 printk(KERN_ERR "I-cache parity error hit\n");
197
198         /* SRR1[62] is from MSR[62] if recoverable, so pass that back */
199         return !!(srr1 & 0x2);
200 }
201
202 static void __init pas_init_early(void)
203 {
204         iommu_init_early_pasemi();
205 }
206
207 static struct of_device_id pasemi_bus_ids[] = {
208         { .type = "sdc", },
209         {},
210 };
211
212 static int __init pasemi_publish_devices(void)
213 {
214         if (!machine_is(pasemi))
215                 return 0;
216
217         /* Publish OF platform devices for SDC and other non-PCI devices */
218         of_platform_bus_probe(NULL, pasemi_bus_ids, NULL);
219
220         return 0;
221 }
222 device_initcall(pasemi_publish_devices);
223
224
225 /*
226  * Called very early, MMU is off, device-tree isn't unflattened
227  */
228 static int __init pas_probe(void)
229 {
230         unsigned long root = of_get_flat_dt_root();
231
232         if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
233                 return 0;
234
235         hpte_init_native();
236
237         alloc_iobmap_l2();
238
239         return 1;
240 }
241
242 define_machine(pasemi) {
243         .name                   = "PA Semi PA6T-1682M",
244         .probe                  = pas_probe,
245         .setup_arch             = pas_setup_arch,
246         .init_early             = pas_init_early,
247         .init_IRQ               = pas_init_IRQ,
248         .get_irq                = mpic_get_irq,
249         .restart                = pas_restart,
250         .get_boot_time          = pas_get_boot_time,
251         .calibrate_decr         = generic_calibrate_decr,
252         .progress               = pas_progress,
253         .machine_check_exception = pas_machine_check_handler,
254 };