ia64/linux-2.6.18-xen.hg

view arch/v850/kernel/sim.c @ 854:950b9eb27661

usbback: fix urb interval value for interrupt urbs.

Signed-off-by: Noboru Iwamatsu <n_iwamatsu@jp.fujitsu.com>
author Keir Fraser <keir.fraser@citrix.com>
date Mon Apr 06 13:51:20 2009 +0100 (2009-04-06)
parents 831230e53067
children
line source
1 /*
2 * arch/v850/kernel/sim.c -- Machine-specific stuff for GDB v850e simulator
3 *
4 * Copyright (C) 2001,02 NEC Corporation
5 * Copyright (C) 2001,02 Miles Bader <miles@gnu.org>
6 *
7 * This file is subject to the terms and conditions of the GNU General
8 * Public License. See the file COPYING in the main directory of this
9 * archive for more details.
10 *
11 * Written by Miles Bader <miles@gnu.org>
12 */
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/mm.h>
18 #include <linux/swap.h>
19 #include <linux/bootmem.h>
20 #include <linux/irq.h>
22 #include <asm/atomic.h>
23 #include <asm/page.h>
24 #include <asm/machdep.h>
25 #include <asm/simsyscall.h>
27 #include "mach.h"
29 /* The name of a file containing the root filesystem. */
30 #define ROOT_FS "rootfs.image"
32 extern void simcons_setup (void);
33 extern void simcons_poll_ttys (void);
34 extern void set_mem_root (void *addr, size_t len, char *cmd_line);
36 static int read_file (const char *name,
37 unsigned long *addr, unsigned long *len,
38 const char **err);
40 void __init mach_setup (char **cmdline)
41 {
42 const char *err;
43 unsigned long root_dev_addr, root_dev_len;
45 simcons_setup ();
47 printk (KERN_INFO "Reading root filesystem: %s", ROOT_FS);
49 if (read_file (ROOT_FS, &root_dev_addr, &root_dev_len, &err)) {
50 printk (" (size %luK)\n", root_dev_len / 1024);
51 set_mem_root ((void *)root_dev_addr, (size_t)root_dev_len,
52 *cmdline);
53 } else
54 printk ("...%s failed!\n", err);
55 }
57 void mach_get_physical_ram (unsigned long *ram_start, unsigned long *ram_len)
58 {
59 *ram_start = RAM_ADDR;
60 *ram_len = RAM_SIZE;
61 }
63 void __init mach_sched_init (struct irqaction *timer_action)
64 {
65 /* ...do magic timer initialization?... */
66 mach_tick = simcons_poll_ttys;
67 setup_irq (0, timer_action);
68 }
71 static void irq_nop (unsigned irq) { }
72 static unsigned irq_zero (unsigned irq) { return 0; }
74 static struct hw_interrupt_type sim_irq_type = {
75 .typename = "IRQ",
76 .startup = irq_zero, /* startup */
77 .shutdown = irq_nop, /* shutdown */
78 .enable = irq_nop, /* enable */
79 .disable = irq_nop, /* disable */
80 .ack = irq_nop, /* ack */
81 .end = irq_nop, /* end */
82 };
84 void __init mach_init_irqs (void)
85 {
86 init_irq_handlers (0, NUM_MACH_IRQS, 1, &sim_irq_type);
87 }
90 void mach_gettimeofday (struct timespec *tv)
91 {
92 long timeval[2], timezone[2];
93 int rval = V850_SIM_SYSCALL (gettimeofday, timeval, timezone);
94 if (rval == 0) {
95 tv->tv_sec = timeval[0];
96 tv->tv_nsec = timeval[1] * 1000;
97 }
98 }
100 void machine_restart (char *__unused)
101 {
102 V850_SIM_SYSCALL (write, 1, "RESTART\n", 8);
103 V850_SIM_SYSCALL (exit, 0);
104 }
106 void machine_halt (void)
107 {
108 V850_SIM_SYSCALL (write, 1, "HALT\n", 5);
109 V850_SIM_SYSCALL (exit, 0);
110 }
112 void machine_power_off (void)
113 {
114 V850_SIM_SYSCALL (write, 1, "POWER OFF\n", 10);
115 V850_SIM_SYSCALL (exit, 0);
116 }
119 /* Load data from a file called NAME into ram. The address and length
120 of the data image are returned in ADDR and LEN. */
121 static int __init
122 read_file (const char *name,
123 unsigned long *addr, unsigned long *len,
124 const char **err)
125 {
126 int rval, fd;
127 unsigned long cur, left;
128 /* Note this is not a normal stat buffer, it's an ad-hoc
129 structure defined by the simulator. */
130 unsigned long stat_buf[10];
132 /* Stat the file to find out the length. */
133 rval = V850_SIM_SYSCALL (stat, name, stat_buf);
134 if (rval < 0) {
135 if (err) *err = "stat";
136 return 0;
137 }
138 *len = stat_buf[4];
140 /* Open the file; `0' is O_RDONLY. */
141 fd = V850_SIM_SYSCALL (open, name, 0);
142 if (fd < 0) {
143 if (err) *err = "open";
144 return 0;
145 }
147 *addr = (unsigned long)alloc_bootmem(*len);
148 if (! *addr) {
149 V850_SIM_SYSCALL (close, fd);
150 if (err) *err = "alloc_bootmem";
151 return 0;
152 }
154 cur = *addr;
155 left = *len;
156 while (left > 0) {
157 int chunk = V850_SIM_SYSCALL (read, fd, cur, left);
158 if (chunk <= 0)
159 break;
160 cur += chunk;
161 left -= chunk;
162 }
163 V850_SIM_SYSCALL (close, fd);
164 if (left > 0) {
165 /* Some read failed. */
166 free_bootmem (*addr, *len);
167 if (err) *err = "read";
168 return 0;
169 }
171 return 1;
172 }