xen: cleancache shim to Xen Transcendent Memory
[linux-2.6/next.git] / arch / alpha / kernel / sys_sx164.c
blob41d4ad4c7c444b292dd485206fa92bee5d1267e8
1 /*
2 * linux/arch/alpha/kernel/sys_sx164.c
4 * Copyright (C) 1995 David A Rusling
5 * Copyright (C) 1996 Jay A Estabrook
6 * Copyright (C) 1998, 1999, 2000 Richard Henderson
8 * Code supporting the SX164 (PCA56+PYXIS).
9 */
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/mm.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>
21 #include <asm/dma.h>
22 #include <asm/irq.h>
23 #include <asm/mmu_context.h>
24 #include <asm/io.h>
25 #include <asm/pgtable.h>
26 #include <asm/core_cia.h>
27 #include <asm/hwrpb.h>
28 #include <asm/tlbflush.h>
30 #include "proto.h"
31 #include "irq_impl.h"
32 #include "pci_impl.h"
33 #include "machvec_impl.h"
36 static void __init
37 sx164_init_irq(void)
39 outb(0, DMA1_RESET_REG);
40 outb(0, DMA2_RESET_REG);
41 outb(DMA_MODE_CASCADE, DMA2_MODE_REG);
42 outb(0, DMA2_MASK_REG);
44 if (alpha_using_srm)
45 alpha_mv.device_interrupt = srm_device_interrupt;
47 init_i8259a_irqs();
49 /* Not interested in the bogus interrupts (0,3,4,5,40-47),
50 NMI (1), or HALT (2). */
51 if (alpha_using_srm)
52 init_srm_irqs(40, 0x3f0000);
53 else
54 init_pyxis_irqs(0xff00003f0000UL);
56 setup_irq(16+6, &timer_cascade_irqaction);
60 * PCI Fixup configuration.
62 * Summary @ PYXIS_INT_REQ:
63 * Bit Meaning
64 * 0 RSVD
65 * 1 NMI
66 * 2 Halt/Reset switch
67 * 3 MBZ
68 * 4 RAZ
69 * 5 RAZ
70 * 6 Interval timer (RTC)
71 * 7 PCI-ISA Bridge
72 * 8 Interrupt Line A from slot 3
73 * 9 Interrupt Line A from slot 2
74 *10 Interrupt Line A from slot 1
75 *11 Interrupt Line A from slot 0
76 *12 Interrupt Line B from slot 3
77 *13 Interrupt Line B from slot 2
78 *14 Interrupt Line B from slot 1
79 *15 Interrupt line B from slot 0
80 *16 Interrupt Line C from slot 3
81 *17 Interrupt Line C from slot 2
82 *18 Interrupt Line C from slot 1
83 *19 Interrupt Line C from slot 0
84 *20 Interrupt Line D from slot 3
85 *21 Interrupt Line D from slot 2
86 *22 Interrupt Line D from slot 1
87 *23 Interrupt Line D from slot 0
89 * IdSel
90 * 5 32 bit PCI option slot 2
91 * 6 64 bit PCI option slot 0
92 * 7 64 bit PCI option slot 1
93 * 8 Cypress I/O
94 * 9 32 bit PCI option slot 3
97 static int __init
98 sx164_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
100 static char irq_tab[5][5] __initdata = {
101 /*INT INTA INTB INTC INTD */
102 { 16+ 9, 16+ 9, 16+13, 16+17, 16+21}, /* IdSel 5 slot 2 J17 */
103 { 16+11, 16+11, 16+15, 16+19, 16+23}, /* IdSel 6 slot 0 J19 */
104 { 16+10, 16+10, 16+14, 16+18, 16+22}, /* IdSel 7 slot 1 J18 */
105 { -1, -1, -1, -1, -1}, /* IdSel 8 SIO */
106 { 16+ 8, 16+ 8, 16+12, 16+16, 16+20} /* IdSel 9 slot 3 J15 */
108 const long min_idsel = 5, max_idsel = 9, irqs_per_slot = 5;
109 return COMMON_TABLE_LOOKUP;
112 static void __init
113 sx164_init_pci(void)
115 cia_init_pci();
116 SMC669_Init(0);
119 static void __init
120 sx164_init_arch(void)
123 * OSF palcode v1.23 forgets to enable PCA56 Motion Video
124 * Instructions. Let's enable it.
125 * We have to check palcode revision because CSERVE interface
126 * is subject to change without notice. For example, it
127 * has been changed completely since v1.16 (found in MILO
128 * distribution). -ink
130 struct percpu_struct *cpu = (struct percpu_struct*)
131 ((char*)hwrpb + hwrpb->processor_offset);
133 if (amask(AMASK_MAX) != 0
134 && alpha_using_srm
135 && (cpu->pal_revision & 0xffff) <= 0x117) {
136 __asm__ __volatile__(
137 "lda $16,8($31)\n"
138 "call_pal 9\n" /* Allow PALRES insns in kernel mode */
139 ".long 0x64000118\n\n" /* hw_mfpr $0,icsr */
140 "ldah $16,(1<<(19-16))($31)\n"
141 "or $0,$16,$0\n" /* set MVE bit */
142 ".long 0x74000118\n" /* hw_mtpr $0,icsr */
143 "lda $16,9($31)\n"
144 "call_pal 9" /* Disable PALRES insns */
145 : : : "$0", "$16");
146 printk("PCA56 MVI set enabled\n");
149 pyxis_init_arch();
153 * The System Vector
156 struct alpha_machine_vector sx164_mv __initmv = {
157 .vector_name = "SX164",
158 DO_EV5_MMU,
159 DO_DEFAULT_RTC,
160 DO_PYXIS_IO,
161 .machine_check = cia_machine_check,
162 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
163 .min_io_address = DEFAULT_IO_BASE,
164 .min_mem_address = DEFAULT_MEM_BASE,
165 .pci_dac_offset = PYXIS_DAC_OFFSET,
167 .nr_irqs = 48,
168 .device_interrupt = pyxis_device_interrupt,
170 .init_arch = sx164_init_arch,
171 .init_irq = sx164_init_irq,
172 .init_rtc = common_init_rtc,
173 .init_pci = sx164_init_pci,
174 .kill_arch = cia_kill_arch,
175 .pci_map_irq = sx164_map_irq,
176 .pci_swizzle = common_swizzle,
178 ALIAS_MV(sx164)