2 * linux/arch/alpha/kernel/sys_noritake.c
4 * Copyright (C) 1995 David A Rusling
5 * Copyright (C) 1996 Jay A Estabrook
6 * Copyright (C) 1998, 1999 Richard Henderson
8 * Code supporting the NORITAKE (AlphaServer 1000A),
9 * CORELLE (AlphaServer 800), and ALCOR Primo (AlphaStation 600A).
12 #include <linux/kernel.h>
13 #include <linux/types.h>
15 #include <linux/sched.h>
16 #include <linux/pci.h>
17 #include <linux/init.h>
18 #include <linux/bitops.h>
20 #include <asm/ptrace.h>
21 #include <asm/system.h>
24 #include <asm/mmu_context.h>
26 #include <asm/pgtable.h>
27 #include <asm/core_apecs.h>
28 #include <asm/core_cia.h>
29 #include <asm/tlbflush.h>
34 #include "machvec_impl.h"
36 /* Note mask bit is true for ENABLED irqs. */
37 static int cached_irq_mask;
40 noritake_update_irq_hw(int irq, int mask)
51 noritake_enable_irq(unsigned int irq)
53 noritake_update_irq_hw(irq, cached_irq_mask |= 1 << (irq - 16));
57 noritake_disable_irq(unsigned int irq)
59 noritake_update_irq_hw(irq, cached_irq_mask &= ~(1 << (irq - 16)));
63 noritake_startup_irq(unsigned int irq)
65 noritake_enable_irq(irq);
70 noritake_end_irq(unsigned int irq)
72 if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
73 noritake_enable_irq(irq);
76 static struct hw_interrupt_type noritake_irq_type = {
77 .typename = "NORITAKE",
78 .startup = noritake_startup_irq,
79 .shutdown = noritake_disable_irq,
80 .enable = noritake_enable_irq,
81 .disable = noritake_disable_irq,
82 .ack = noritake_disable_irq,
83 .end = noritake_end_irq,
87 noritake_device_interrupt(unsigned long vector)
92 /* Read the interrupt summary registers of NORITAKE */
93 pld = (((unsigned long) inw(0x54c) << 32)
94 | ((unsigned long) inw(0x54a) << 16)
95 | ((unsigned long) inb(0xa0) << 8)
99 * Now for every possible bit set, work through them and call
100 * the appropriate interrupt handler.
104 pld &= pld - 1; /* clear least bit set */
106 isa_device_interrupt(vector);
114 noritake_srm_device_interrupt(unsigned long vector)
118 irq = (vector - 0x800) >> 4;
121 * I really hate to do this, too, but the NORITAKE SRM console also
122 * reports PCI vectors *lower* than I expected from the bit numbers
123 * in the documentation.
124 * But I really don't want to change the fixup code for allocation
125 * of IRQs, nor the alpha_irq_mask maintenance stuff, both of which
126 * look nice and clean now.
127 * So, here's this additional grotty hack... :-(
136 noritake_init_irq(void)
141 alpha_mv.device_interrupt = noritake_srm_device_interrupt;
146 for (i = 16; i < 48; ++i) {
147 irq_desc[i].status = IRQ_DISABLED | IRQ_LEVEL;
148 irq_desc[i].chip = &noritake_irq_type;
152 common_init_isa_dma();
157 * PCI Fixup configuration.
159 * Summary @ 0x542, summary register #1:
161 * 0 All valid ints from summary regs 2 & 3
162 * 1 QLOGIC ISP1020A SCSI
163 * 2 Interrupt Line A from slot 0
164 * 3 Interrupt Line B from slot 0
165 * 4 Interrupt Line A from slot 1
166 * 5 Interrupt line B from slot 1
167 * 6 Interrupt Line A from slot 2
168 * 7 Interrupt Line B from slot 2
169 * 8 Interrupt Line A from slot 3
170 * 9 Interrupt Line B from slot 3
171 *10 Interrupt Line A from slot 4
172 *11 Interrupt Line B from slot 4
173 *12 Interrupt Line A from slot 5
174 *13 Interrupt Line B from slot 5
175 *14 Interrupt Line A from slot 6
176 *15 Interrupt Line B from slot 6
178 * Summary @ 0x544, summary register #2:
180 * 0 OR of all unmasked ints in SR #2
181 * 1 OR of secondary bus ints
182 * 2 Interrupt Line C from slot 0
183 * 3 Interrupt Line D from slot 0
184 * 4 Interrupt Line C from slot 1
185 * 5 Interrupt line D from slot 1
186 * 6 Interrupt Line C from slot 2
187 * 7 Interrupt Line D from slot 2
188 * 8 Interrupt Line C from slot 3
189 * 9 Interrupt Line D from slot 3
190 *10 Interrupt Line C from slot 4
191 *11 Interrupt Line D from slot 4
192 *12 Interrupt Line C from slot 5
193 *13 Interrupt Line D from slot 5
194 *14 Interrupt Line C from slot 6
195 *15 Interrupt Line D from slot 6
197 * The device to slot mapping looks like:
200 * 7 Intel PCI-EISA bridge chip
201 * 8 DEC PCI-PCI bridge chip
202 * 11 PCI on board slot 0
203 * 12 PCI on board slot 1
204 * 13 PCI on board slot 2
207 * This two layered interrupt approach means that we allocate IRQ 16 and
208 * above for PCI interrupts. The IRQ relates to which bit the interrupt
209 * comes in on. This makes interrupt processing much easier.
213 noritake_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
215 static char irq_tab[15][5] __initdata = {
216 /*INT INTA INTB INTC INTD */
217 /* note: IDSELs 16, 17, and 25 are CORELLE only */
218 { 16+1, 16+1, 16+1, 16+1, 16+1}, /* IdSel 16, QLOGIC */
219 { -1, -1, -1, -1, -1}, /* IdSel 17, S3 Trio64 */
220 { -1, -1, -1, -1, -1}, /* IdSel 18, PCEB */
221 { -1, -1, -1, -1, -1}, /* IdSel 19, PPB */
222 { -1, -1, -1, -1, -1}, /* IdSel 20, ???? */
223 { -1, -1, -1, -1, -1}, /* IdSel 21, ???? */
224 { 16+2, 16+2, 16+3, 32+2, 32+3}, /* IdSel 22, slot 0 */
225 { 16+4, 16+4, 16+5, 32+4, 32+5}, /* IdSel 23, slot 1 */
226 { 16+6, 16+6, 16+7, 32+6, 32+7}, /* IdSel 24, slot 2 */
227 { 16+8, 16+8, 16+9, 32+8, 32+9}, /* IdSel 25, slot 3 */
228 /* The following 5 are actually on PCI bus 1, which is
229 across the built-in bridge of the NORITAKE only. */
230 { 16+1, 16+1, 16+1, 16+1, 16+1}, /* IdSel 16, QLOGIC */
231 { 16+8, 16+8, 16+9, 32+8, 32+9}, /* IdSel 17, slot 3 */
232 {16+10, 16+10, 16+11, 32+10, 32+11}, /* IdSel 18, slot 4 */
233 {16+12, 16+12, 16+13, 32+12, 32+13}, /* IdSel 19, slot 5 */
234 {16+14, 16+14, 16+15, 32+14, 32+15}, /* IdSel 20, slot 6 */
236 const long min_idsel = 5, max_idsel = 19, irqs_per_slot = 5;
237 return COMMON_TABLE_LOOKUP;
241 noritake_swizzle(struct pci_dev *dev, u8 *pinp)
243 int slot, pin = *pinp;
245 if (dev->bus->number == 0) {
246 slot = PCI_SLOT(dev->devfn);
248 /* Check for the built-in bridge */
249 else if (PCI_SLOT(dev->bus->self->devfn) == 8) {
250 slot = PCI_SLOT(dev->devfn) + 15; /* WAG! */
254 /* Must be a card-based bridge. */
256 if (PCI_SLOT(dev->bus->self->devfn) == 8) {
257 slot = PCI_SLOT(dev->devfn) + 15;
260 pin = bridge_swizzle(pin, PCI_SLOT(dev->devfn)) ;
262 /* Move up the chain of bridges. */
263 dev = dev->bus->self;
264 /* Slot of the next bridge. */
265 slot = PCI_SLOT(dev->devfn);
266 } while (dev->bus->self);
272 #if defined(CONFIG_ALPHA_GENERIC) || !defined(CONFIG_ALPHA_PRIMO)
274 noritake_apecs_machine_check(unsigned long vector, unsigned long la_ptr)
276 #define MCHK_NO_DEVSEL 0x205U
277 #define MCHK_NO_TABT 0x204U
279 struct el_common *mchk_header;
282 mchk_header = (struct el_common *)la_ptr;
284 /* Clear the error before any reporting. */
292 code = mchk_header->code;
293 process_mcheck_info(vector, la_ptr, "NORITAKE APECS",
295 && (code == MCHK_NO_DEVSEL
296 || code == MCHK_NO_TABT)));
305 #if defined(CONFIG_ALPHA_GENERIC) || !defined(CONFIG_ALPHA_PRIMO)
306 struct alpha_machine_vector noritake_mv __initmv = {
307 .vector_name = "Noritake",
311 .machine_check = noritake_apecs_machine_check,
312 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
313 .min_io_address = EISA_DEFAULT_IO_BASE,
314 .min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
317 .device_interrupt = noritake_device_interrupt,
319 .init_arch = apecs_init_arch,
320 .init_irq = noritake_init_irq,
321 .init_rtc = common_init_rtc,
322 .init_pci = common_init_pci,
323 .pci_map_irq = noritake_map_irq,
324 .pci_swizzle = noritake_swizzle,
329 #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_PRIMO)
330 struct alpha_machine_vector noritake_primo_mv __initmv = {
331 .vector_name = "Noritake-Primo",
335 .machine_check = cia_machine_check,
336 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
337 .min_io_address = EISA_DEFAULT_IO_BASE,
338 .min_mem_address = CIA_DEFAULT_MEM_BASE,
341 .device_interrupt = noritake_device_interrupt,
343 .init_arch = cia_init_arch,
344 .init_irq = noritake_init_irq,
345 .init_rtc = common_init_rtc,
346 .init_pci = cia_init_pci,
347 .kill_arch = cia_kill_arch,
348 .pci_map_irq = noritake_map_irq,
349 .pci_swizzle = noritake_swizzle,
351 ALIAS_MV(noritake_primo)