[CPUFREQ] Fix up merge conflicts with recent ACPI changes.
[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
39 #include "pasemi.h"
40
41 static void __iomem *reset_reg;
42
43 static void pas_restart(char *cmd)
44 {
45         printk("Restarting...\n");
46         while (1)
47                 out_le32(reset_reg, 0x6000000);
48 }
49
50 #ifdef CONFIG_SMP
51 static DEFINE_SPINLOCK(timebase_lock);
52
53 static void __devinit pas_give_timebase(void)
54 {
55         unsigned long tb;
56
57         spin_lock(&timebase_lock);
58         mtspr(SPRN_TBCTL, TBCTL_FREEZE);
59         tb = mftb();
60         mtspr(SPRN_TBCTL, TBCTL_UPDATE_LOWER | (tb & 0xffffffff));
61         mtspr(SPRN_TBCTL, TBCTL_UPDATE_UPPER | (tb >> 32));
62         mtspr(SPRN_TBCTL, TBCTL_RESTART);
63         spin_unlock(&timebase_lock);
64         pr_debug("pas_give_timebase: cpu %d gave tb %lx\n",
65                  smp_processor_id(), tb);
66 }
67
68 static void __devinit pas_take_timebase(void)
69 {
70         pr_debug("pas_take_timebase: cpu %d has tb %lx\n",
71                  smp_processor_id(), mftb());
72 }
73
74 struct smp_ops_t pas_smp_ops = {
75         .probe          = smp_mpic_probe,
76         .message_pass   = smp_mpic_message_pass,
77         .kick_cpu       = smp_generic_kick_cpu,
78         .setup_cpu      = smp_mpic_setup_cpu,
79         .give_timebase  = pas_give_timebase,
80         .take_timebase  = pas_take_timebase,
81 };
82 #endif /* CONFIG_SMP */
83
84 void __init pas_setup_arch(void)
85 {
86 #ifdef CONFIG_SMP
87         /* Setup SMP callback */
88         smp_ops = &pas_smp_ops;
89 #endif
90         /* Lookup PCI hosts */
91         pas_pci_init();
92
93 #ifdef CONFIG_DUMMY_CONSOLE
94         conswitchp = &dummy_con;
95 #endif
96
97         /* Remap SDC register for doing reset */
98         /* XXXOJN This should maybe come out of the device tree */
99         reset_reg = ioremap(0xfc101100, 4);
100
101         pasemi_idle_init();
102 }
103
104 /* No legacy IO on our parts */
105 static int pas_check_legacy_ioport(unsigned int baseport)
106 {
107         return -ENODEV;
108 }
109
110 static __init void pas_init_IRQ(void)
111 {
112         struct device_node *np;
113         struct device_node *root, *mpic_node;
114         unsigned long openpic_addr;
115         const unsigned int *opprop;
116         int naddr, opplen;
117         struct mpic *mpic;
118
119         mpic_node = NULL;
120
121         for_each_node_by_type(np, "interrupt-controller")
122                 if (device_is_compatible(np, "open-pic")) {
123                         mpic_node = np;
124                         break;
125                 }
126         if (!mpic_node)
127                 for_each_node_by_type(np, "open-pic") {
128                         mpic_node = np;
129                         break;
130                 }
131         if (!mpic_node) {
132                 printk(KERN_ERR
133                         "Failed to locate the MPIC interrupt controller\n");
134                 return;
135         }
136
137         /* Find address list in /platform-open-pic */
138         root = of_find_node_by_path("/");
139         naddr = prom_n_addr_cells(root);
140         opprop = get_property(root, "platform-open-pic", &opplen);
141         if (!opprop) {
142                 printk(KERN_ERR "No platform-open-pic property.\n");
143                 of_node_put(root);
144                 return;
145         }
146         openpic_addr = of_read_number(opprop, naddr);
147         printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
148
149         mpic = mpic_alloc(mpic_node, openpic_addr,
150                           MPIC_PRIMARY|MPIC_LARGE_VECTORS,
151                           0, 0, " PAS-OPIC  ");
152         BUG_ON(!mpic);
153
154         mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
155         mpic_init(mpic);
156         of_node_put(mpic_node);
157         of_node_put(root);
158 }
159
160 static void __init pas_progress(char *s, unsigned short hex)
161 {
162         printk("[%04x] : %s\n", hex, s ? s : "");
163 }
164
165
166 static int pas_machine_check_handler(struct pt_regs *regs)
167 {
168         int cpu = smp_processor_id();
169         unsigned long srr0, srr1, dsisr;
170
171         srr0 = regs->nip;
172         srr1 = regs->msr;
173         dsisr = mfspr(SPRN_DSISR);
174         printk(KERN_ERR "Machine Check on CPU %d\n", cpu);
175         printk(KERN_ERR "SRR0 0x%016lx SRR1 0x%016lx\n", srr0, srr1);
176         printk(KERN_ERR "DSISR 0x%016lx DAR 0x%016lx\n", dsisr, regs->dar);
177         printk(KERN_ERR "Cause:\n");
178
179         if (srr1 & 0x200000)
180                 printk(KERN_ERR "Signalled by SDC\n");
181         if (srr1 & 0x100000) {
182                 printk(KERN_ERR "Load/Store detected error:\n");
183                 if (dsisr & 0x8000)
184                         printk(KERN_ERR "D-cache ECC double-bit error or bus error\n");
185                 if (dsisr & 0x4000)
186                         printk(KERN_ERR "LSU snoop response error\n");
187                 if (dsisr & 0x2000)
188                         printk(KERN_ERR "MMU SLB multi-hit or invalid B field\n");
189                 if (dsisr & 0x1000)
190                         printk(KERN_ERR "Recoverable Duptags\n");
191                 if (dsisr & 0x800)
192                         printk(KERN_ERR "Recoverable D-cache parity error count overflow\n");
193                 if (dsisr & 0x400)
194                         printk(KERN_ERR "TLB parity error count overflow\n");
195         }
196         if (srr1 & 0x80000)
197                 printk(KERN_ERR "Bus Error\n");
198         if (srr1 & 0x40000)
199                 printk(KERN_ERR "I-side SLB multiple hit\n");
200         if (srr1 & 0x20000)
201                 printk(KERN_ERR "I-cache parity error hit\n");
202
203         /* SRR1[62] is from MSR[62] if recoverable, so pass that back */
204         return !!(srr1 & 0x2);
205 }
206
207 static void __init pas_init_early(void)
208 {
209         iommu_init_early_pasemi();
210 }
211
212
213 /*
214  * Called very early, MMU is off, device-tree isn't unflattened
215  */
216 static int __init pas_probe(void)
217 {
218         unsigned long root = of_get_flat_dt_root();
219
220         if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
221                 return 0;
222
223         hpte_init_native();
224
225         alloc_iobmap_l2();
226
227         return 1;
228 }
229
230 define_machine(pas) {
231         .name                   = "PA Semi PA6T-1682M",
232         .probe                  = pas_probe,
233         .setup_arch             = pas_setup_arch,
234         .init_early             = pas_init_early,
235         .init_IRQ               = pas_init_IRQ,
236         .get_irq                = mpic_get_irq,
237         .restart                = pas_restart,
238         .get_boot_time          = pas_get_boot_time,
239         .calibrate_decr         = generic_calibrate_decr,
240         .check_legacy_ioport    = pas_check_legacy_ioport,
241         .progress               = pas_progress,
242         .machine_check_exception = pas_machine_check_handler,
243         .pci_irq_fixup          = pas_pci_irq_fixup,
244 };