ia64/linux-2.6.18-xen.hg

view arch/m68k/mvme147/config.c @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children
line source
1 /*
2 * arch/m68k/mvme147/config.c
3 *
4 * Copyright (C) 1996 Dave Frascone [chaos@mindspring.com]
5 * Cloned from Richard Hirst [richard@sleepie.demon.co.uk]
6 *
7 * Based on:
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License. See the file README.legal in the main directory of this archive
13 * for more details.
14 */
16 #include <linux/types.h>
17 #include <linux/kernel.h>
18 #include <linux/mm.h>
19 #include <linux/tty.h>
20 #include <linux/console.h>
21 #include <linux/linkage.h>
22 #include <linux/init.h>
23 #include <linux/major.h>
24 #include <linux/genhd.h>
25 #include <linux/rtc.h>
26 #include <linux/interrupt.h>
28 #include <asm/bootinfo.h>
29 #include <asm/system.h>
30 #include <asm/pgtable.h>
31 #include <asm/setup.h>
32 #include <asm/irq.h>
33 #include <asm/traps.h>
34 #include <asm/rtc.h>
35 #include <asm/machdep.h>
36 #include <asm/mvme147hw.h>
39 static void mvme147_get_model(char *model);
40 static int mvme147_get_hardware_list(char *buffer);
41 extern void mvme147_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
42 extern unsigned long mvme147_gettimeoffset (void);
43 extern int mvme147_hwclk (int, struct rtc_time *);
44 extern int mvme147_set_clock_mmss (unsigned long);
45 extern void mvme147_reset (void);
46 extern void mvme147_waitbut(void);
49 static int bcd2int (unsigned char b);
51 /* Save tick handler routine pointer, will point to do_timer() in
52 * kernel/sched.c, called via mvme147_process_int() */
54 irqreturn_t (*tick_handler)(int, void *, struct pt_regs *);
57 int mvme147_parse_bootinfo(const struct bi_record *bi)
58 {
59 if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
60 return 0;
61 else
62 return 1;
63 }
65 void mvme147_reset(void)
66 {
67 printk ("\r\n\nCalled mvme147_reset\r\n");
68 m147_pcc->watchdog = 0x0a; /* Clear timer */
69 m147_pcc->watchdog = 0xa5; /* Enable watchdog - 100ms to reset */
70 while (1)
71 ;
72 }
74 static void mvme147_get_model(char *model)
75 {
76 sprintf(model, "Motorola MVME147");
77 }
80 static int mvme147_get_hardware_list(char *buffer)
81 {
82 *buffer = '\0';
84 return 0;
85 }
87 /*
88 * This function is called during kernel startup to initialize
89 * the mvme147 IRQ handling routines.
90 */
92 void mvme147_init_IRQ(void)
93 {
94 m68k_setup_user_interrupt(VEC_USER, 192, NULL);
95 }
97 void __init config_mvme147(void)
98 {
99 mach_max_dma_address = 0x01000000;
100 mach_sched_init = mvme147_sched_init;
101 mach_init_IRQ = mvme147_init_IRQ;
102 mach_gettimeoffset = mvme147_gettimeoffset;
103 mach_hwclk = mvme147_hwclk;
104 mach_set_clock_mmss = mvme147_set_clock_mmss;
105 mach_reset = mvme147_reset;
106 mach_get_model = mvme147_get_model;
107 mach_get_hardware_list = mvme147_get_hardware_list;
109 /* Board type is only set by newer versions of vmelilo/tftplilo */
110 if (!vme_brdtype)
111 vme_brdtype = VME_TYPE_MVME147;
112 }
115 /* Using pcc tick timer 1 */
117 static irqreturn_t mvme147_timer_int (int irq, void *dev_id, struct pt_regs *fp)
118 {
119 m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR;
120 m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
121 return tick_handler(irq, dev_id, fp);
122 }
125 void mvme147_sched_init (irqreturn_t (*timer_routine)(int, void *, struct pt_regs *))
126 {
127 tick_handler = timer_routine;
128 request_irq (PCC_IRQ_TIMER1, mvme147_timer_int,
129 IRQ_FLG_REPLACE, "timer 1", NULL);
131 /* Init the clock with a value */
132 /* our clock goes off every 6.25us */
133 m147_pcc->t1_preload = PCC_TIMER_PRELOAD;
134 m147_pcc->t1_cntrl = 0x0; /* clear timer */
135 m147_pcc->t1_cntrl = 0x3; /* start timer */
136 m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR; /* clear pending ints */
137 m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
138 }
140 /* This is always executed with interrupts disabled. */
141 /* XXX There are race hazards in this code XXX */
142 unsigned long mvme147_gettimeoffset (void)
143 {
144 volatile unsigned short *cp = (volatile unsigned short *)0xfffe1012;
145 unsigned short n;
147 n = *cp;
148 while (n != *cp)
149 n = *cp;
151 n -= PCC_TIMER_PRELOAD;
152 return (unsigned long)n * 25 / 4;
153 }
155 static int bcd2int (unsigned char b)
156 {
157 return ((b>>4)*10 + (b&15));
158 }
160 int mvme147_hwclk(int op, struct rtc_time *t)
161 {
162 #warning check me!
163 if (!op) {
164 m147_rtc->ctrl = RTC_READ;
165 t->tm_year = bcd2int (m147_rtc->bcd_year);
166 t->tm_mon = bcd2int (m147_rtc->bcd_mth);
167 t->tm_mday = bcd2int (m147_rtc->bcd_dom);
168 t->tm_hour = bcd2int (m147_rtc->bcd_hr);
169 t->tm_min = bcd2int (m147_rtc->bcd_min);
170 t->tm_sec = bcd2int (m147_rtc->bcd_sec);
171 m147_rtc->ctrl = 0;
172 }
173 return 0;
174 }
176 int mvme147_set_clock_mmss (unsigned long nowtime)
177 {
178 return 0;
179 }
181 /*------------------- Serial console stuff ------------------------*/
183 static void scc_delay (void)
184 {
185 int n;
186 volatile int trash;
188 for (n = 0; n < 20; n++)
189 trash = n;
190 }
192 static void scc_write (char ch)
193 {
194 volatile char *p = (volatile char *)M147_SCC_A_ADDR;
196 do {
197 scc_delay();
198 }
199 while (!(*p & 4));
200 scc_delay();
201 *p = 8;
202 scc_delay();
203 *p = ch;
204 }
207 void m147_scc_write (struct console *co, const char *str, unsigned count)
208 {
209 unsigned long flags;
211 local_irq_save(flags);
213 while (count--)
214 {
215 if (*str == '\n')
216 scc_write ('\r');
217 scc_write (*str++);
218 }
219 local_irq_restore(flags);
220 }
222 void mvme147_init_console_port (struct console *co, int cflag)
223 {
224 co->write = m147_scc_write;
225 }