2 * linux/arch/alpha/kernel/sys_mikasa.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 MIKASA (AlphaServer 1000).
11 #include <linux/kernel.h>
12 #include <linux/types.h>
14 #include <linux/sched.h>
15 #include <linux/pci.h>
16 #include <linux/init.h>
17 #include <linux/bitops.h>
19 #include <asm/ptrace.h>
20 #include <asm/system.h>
23 #include <asm/mmu_context.h>
25 #include <asm/pgtable.h>
26 #include <asm/core_apecs.h>
27 #include <asm/core_cia.h>
28 #include <asm/tlbflush.h>
33 #include "machvec_impl.h"
36 /* Note mask bit is true for ENABLED irqs. */
37 static int cached_irq_mask;
40 mikasa_update_irq_hw(int mask)
46 mikasa_enable_irq(struct irq_data *d)
48 mikasa_update_irq_hw(cached_irq_mask |= 1 << (d->irq - 16));
52 mikasa_disable_irq(struct irq_data *d)
54 mikasa_update_irq_hw(cached_irq_mask &= ~(1 << (d->irq - 16)));
57 static struct irq_chip mikasa_irq_type = {
59 .irq_unmask = mikasa_enable_irq,
60 .irq_mask = mikasa_disable_irq,
61 .irq_mask_ack = mikasa_disable_irq,
65 mikasa_device_interrupt(unsigned long vector)
70 /* Read the interrupt summary registers */
71 pld = (((~inw(0x534) & 0x0000ffffUL) << 16)
72 | (((unsigned long) inb(0xa0)) << 8)
76 * Now for every possible bit set, work through them and call
77 * the appropriate interrupt handler.
81 pld &= pld - 1; /* clear least bit set */
83 isa_device_interrupt(vector);
96 alpha_mv.device_interrupt = srm_device_interrupt;
98 mikasa_update_irq_hw(0);
100 for (i = 16; i < 32; ++i) {
101 irq_set_chip_and_handler(i, &mikasa_irq_type,
103 irq_set_status_flags(i, IRQ_LEVEL);
107 common_init_isa_dma();
112 * PCI Fixup configuration.
116 * 0 Interrupt Line A from slot 0
117 * 1 Interrupt Line B from slot 0
118 * 2 Interrupt Line C from slot 0
119 * 3 Interrupt Line D from slot 0
120 * 4 Interrupt Line A from slot 1
121 * 5 Interrupt line B from slot 1
122 * 6 Interrupt Line C from slot 1
123 * 7 Interrupt Line D from slot 1
124 * 8 Interrupt Line A from slot 2
125 * 9 Interrupt Line B from slot 2
126 *10 Interrupt Line C from slot 2
127 *11 Interrupt Line D from slot 2
129 *13 Power Supply Fail
133 * The device to slot mapping looks like:
136 * 6 NCR SCSI controller
137 * 7 Intel PCI-EISA bridge chip
138 * 11 PCI on board slot 0
139 * 12 PCI on board slot 1
140 * 13 PCI on board slot 2
143 * This two layered interrupt approach means that we allocate IRQ 16 and
144 * above for PCI interrupts. The IRQ relates to which bit the interrupt
145 * comes in on. This makes interrupt processing much easier.
149 mikasa_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
151 static char irq_tab[8][5] __initdata = {
152 /*INT INTA INTB INTC INTD */
153 {16+12, 16+12, 16+12, 16+12, 16+12}, /* IdSel 17, SCSI */
154 { -1, -1, -1, -1, -1}, /* IdSel 18, PCEB */
155 { -1, -1, -1, -1, -1}, /* IdSel 19, ???? */
156 { -1, -1, -1, -1, -1}, /* IdSel 20, ???? */
157 { -1, -1, -1, -1, -1}, /* IdSel 21, ???? */
158 { 16+0, 16+0, 16+1, 16+2, 16+3}, /* IdSel 22, slot 0 */
159 { 16+4, 16+4, 16+5, 16+6, 16+7}, /* IdSel 23, slot 1 */
160 { 16+8, 16+8, 16+9, 16+10, 16+11}, /* IdSel 24, slot 2 */
162 const long min_idsel = 6, max_idsel = 13, irqs_per_slot = 5;
163 return COMMON_TABLE_LOOKUP;
167 #if defined(CONFIG_ALPHA_GENERIC) || !defined(CONFIG_ALPHA_PRIMO)
169 mikasa_apecs_machine_check(unsigned long vector, unsigned long la_ptr)
171 #define MCHK_NO_DEVSEL 0x205U
172 #define MCHK_NO_TABT 0x204U
174 struct el_common *mchk_header;
177 mchk_header = (struct el_common *)la_ptr;
179 /* Clear the error before any reporting. */
187 code = mchk_header->code;
188 process_mcheck_info(vector, la_ptr, "MIKASA APECS",
190 && (code == MCHK_NO_DEVSEL
191 || code == MCHK_NO_TABT)));
200 #if defined(CONFIG_ALPHA_GENERIC) || !defined(CONFIG_ALPHA_PRIMO)
201 struct alpha_machine_vector mikasa_mv __initmv = {
202 .vector_name = "Mikasa",
206 .machine_check = mikasa_apecs_machine_check,
207 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
208 .min_io_address = DEFAULT_IO_BASE,
209 .min_mem_address = APECS_AND_LCA_DEFAULT_MEM_BASE,
212 .device_interrupt = mikasa_device_interrupt,
214 .init_arch = apecs_init_arch,
215 .init_irq = mikasa_init_irq,
216 .init_rtc = common_init_rtc,
217 .init_pci = common_init_pci,
218 .pci_map_irq = mikasa_map_irq,
219 .pci_swizzle = common_swizzle,
224 #if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_PRIMO)
225 struct alpha_machine_vector mikasa_primo_mv __initmv = {
226 .vector_name = "Mikasa-Primo",
230 .machine_check = cia_machine_check,
231 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
232 .min_io_address = DEFAULT_IO_BASE,
233 .min_mem_address = CIA_DEFAULT_MEM_BASE,
236 .device_interrupt = mikasa_device_interrupt,
238 .init_arch = cia_init_arch,
239 .init_irq = mikasa_init_irq,
240 .init_rtc = common_init_rtc,
241 .init_pci = cia_init_pci,
242 .kill_arch = cia_kill_arch,
243 .pci_map_irq = mikasa_map_irq,
244 .pci_swizzle = common_swizzle,
246 ALIAS_MV(mikasa_primo)