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10#include <linux/kernel.h>
11#include <linux/types.h>
12#include <linux/mm.h>
13#include <linux/sched.h>
14#include <linux/pci.h>
15#include <linux/init.h>
16
17#include <asm/ptrace.h>
18
19#define __EXTERN_INLINE inline
20#include <asm/io.h>
21#include <asm/jensen.h>
22#undef __EXTERN_INLINE
23
24#include <asm/dma.h>
25#include <asm/irq.h>
26#include <asm/mmu_context.h>
27#include <asm/pgtable.h>
28#include <asm/tlbflush.h>
29
30#include "proto.h"
31#include "irq_impl.h"
32#include "pci_impl.h"
33#include "machvec_impl.h"
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63
64static void
65jensen_local_enable(struct irq_data *d)
66{
67
68 if (d->irq == 7)
69 i8259a_enable_irq(d);
70}
71
72static void
73jensen_local_disable(struct irq_data *d)
74{
75
76 if (d->irq == 7)
77 i8259a_disable_irq(d);
78}
79
80static void
81jensen_local_mask_ack(struct irq_data *d)
82{
83
84 if (d->irq == 7)
85 i8259a_mask_and_ack_irq(d);
86}
87
88static struct irq_chip jensen_local_irq_type = {
89 .name = "LOCAL",
90 .irq_unmask = jensen_local_enable,
91 .irq_mask = jensen_local_disable,
92 .irq_mask_ack = jensen_local_mask_ack,
93};
94
95static void
96jensen_device_interrupt(unsigned long vector)
97{
98 int irq;
99
100 switch (vector) {
101 case 0x660:
102 printk("Whee.. NMI received. Probable hardware error\n");
103 printk("61=%02x, 461=%02x\n", inb(0x61), inb(0x461));
104 return;
105
106
107 case 0x900: irq = 4; break;
108 case 0x920: irq = 3; break;
109 case 0x980: irq = 1; break;
110 case 0x990: irq = 9; break;
111
112 default:
113 if (vector > 0x900) {
114 printk("Unknown local interrupt %lx\n", vector);
115 return;
116 }
117
118 irq = (vector - 0x800) >> 4;
119 if (irq == 1)
120 irq = 7;
121 break;
122 }
123
124
125 if (!irq_has_action(irq)) {
126
127 if (vector >= 0x900)
128 {
129
130 inb(0x64);
131 inb(0x60);
132
133 inb(0x3fa);
134 inb(0x2fa);
135 outb(0x0c, 0x3fc);
136 outb(0x0c, 0x2fc);
137
138 outb(0,0x61);
139 outb(0,0x461);
140 }
141 }
142
143#if 0
144
145 {
146 static unsigned int last_msg = 0, last_cc = 0;
147 static int last_irq = -1, count = 0;
148 unsigned int cc;
149
150 __asm __volatile("rpcc %0" : "=r"(cc));
151 ++count;
152#define JENSEN_CYCLES_PER_SEC (150000000)
153 if (cc - last_msg > ((JENSEN_CYCLES_PER_SEC) * 3) ||
154 irq != last_irq) {
155 printk(KERN_CRIT " irq %d count %d cc %u @ %lx\n",
156 irq, count, cc-last_cc, get_irq_regs()->pc);
157 count = 0;
158 last_msg = cc;
159 last_irq = irq;
160 }
161 last_cc = cc;
162 }
163#endif
164
165 handle_irq(irq);
166}
167
168static void __init
169jensen_init_irq(void)
170{
171 init_i8259a_irqs();
172
173 irq_set_chip_and_handler(1, &jensen_local_irq_type, handle_level_irq);
174 irq_set_chip_and_handler(4, &jensen_local_irq_type, handle_level_irq);
175 irq_set_chip_and_handler(3, &jensen_local_irq_type, handle_level_irq);
176 irq_set_chip_and_handler(7, &jensen_local_irq_type, handle_level_irq);
177 irq_set_chip_and_handler(9, &jensen_local_irq_type, handle_level_irq);
178
179 common_init_isa_dma();
180}
181
182static void __init
183jensen_init_arch(void)
184{
185 struct pci_controller *hose;
186#ifdef CONFIG_PCI
187 static struct pci_dev fake_isa_bridge = { .dma_mask = 0xffffffffUL, };
188
189 isa_bridge = &fake_isa_bridge;
190#endif
191
192
193
194
195 pci_isa_hose = hose = alloc_pci_controller();
196 hose->io_space = &ioport_resource;
197 hose->mem_space = &iomem_resource;
198 hose->index = 0;
199
200 hose->sparse_mem_base = EISA_MEM - IDENT_ADDR;
201 hose->dense_mem_base = 0;
202 hose->sparse_io_base = EISA_IO - IDENT_ADDR;
203 hose->dense_io_base = 0;
204
205 hose->sg_isa = hose->sg_pci = NULL;
206 __direct_map_base = 0;
207 __direct_map_size = 0xffffffff;
208}
209
210static void
211jensen_machine_check(unsigned long vector, unsigned long la)
212{
213 printk(KERN_CRIT "Machine check\n");
214}
215
216
217
218
219
220struct alpha_machine_vector jensen_mv __initmv = {
221 .vector_name = "Jensen",
222 DO_EV4_MMU,
223 IO_LITE(JENSEN,jensen),
224 .machine_check = jensen_machine_check,
225 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
226 .rtc_port = 0x170,
227
228 .nr_irqs = 16,
229 .device_interrupt = jensen_device_interrupt,
230
231 .init_arch = jensen_init_arch,
232 .init_irq = jensen_init_irq,
233 .init_rtc = common_init_rtc,
234 .init_pci = NULL,
235 .kill_arch = NULL,
236};
237ALIAS_MV(jensen)
238