ia64/linux-2.6.18-xen.hg

view arch/m68k/sun3x/prom.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 /* Prom access routines for the sun3x */
3 #include <linux/types.h>
4 #include <linux/kernel.h>
5 #include <linux/tty.h>
6 #include <linux/console.h>
7 #include <linux/init.h>
8 #include <linux/mm.h>
9 #include <linux/string.h>
11 #include <asm/page.h>
12 #include <asm/pgtable.h>
13 #include <asm/bootinfo.h>
14 #include <asm/setup.h>
15 #include <asm/traps.h>
16 #include <asm/sun3xprom.h>
17 #include <asm/idprom.h>
18 #include <asm/segment.h>
19 #include <asm/sun3ints.h>
20 #include <asm/openprom.h>
21 #include <asm/machines.h>
23 void (*sun3x_putchar)(int);
24 int (*sun3x_getchar)(void);
25 int (*sun3x_mayget)(void);
26 int (*sun3x_mayput)(int);
27 void (*sun3x_prom_reboot)(void);
28 e_vector sun3x_prom_abort;
29 struct linux_romvec *romvec;
31 /* prom vector table */
32 e_vector *sun3x_prom_vbr;
34 /* Handle returning to the prom */
35 void sun3x_halt(void)
36 {
37 unsigned long flags;
39 /* Disable interrupts while we mess with things */
40 local_irq_save(flags);
42 /* Restore prom vbr */
43 __asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)sun3x_prom_vbr));
45 /* Restore prom NMI clock */
46 // sun3x_disable_intreg(5);
47 sun3_enable_irq(7);
49 /* Let 'er rip */
50 __asm__ volatile ("trap #14" : : );
52 /* Restore everything */
53 sun3_disable_irq(7);
54 sun3_enable_irq(5);
56 __asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)vectors));
57 local_irq_restore(flags);
58 }
60 void sun3x_reboot(void)
61 {
62 /* This never returns, don't bother saving things */
63 local_irq_disable();
65 /* Restore prom vbr */
66 __asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)sun3x_prom_vbr));
68 /* Restore prom NMI clock */
69 sun3_disable_irq(5);
70 sun3_enable_irq(7);
72 /* Let 'er rip */
73 (*romvec->pv_reboot)("vmlinux");
74 }
76 extern char m68k_debug_device[];
78 static void sun3x_prom_write(struct console *co, const char *s,
79 unsigned int count)
80 {
81 while (count--) {
82 if (*s == '\n')
83 sun3x_putchar('\r');
84 sun3x_putchar(*s++);
85 }
86 }
88 /* debug console - write-only */
90 static struct console sun3x_debug = {
91 .name = "debug",
92 .write = sun3x_prom_write,
93 .flags = CON_PRINTBUFFER,
94 .index = -1,
95 };
97 void sun3x_prom_init(void)
98 {
99 /* Read the vector table */
101 sun3x_putchar = *(void (**)(int)) (SUN3X_P_PUTCHAR);
102 sun3x_getchar = *(int (**)(void)) (SUN3X_P_GETCHAR);
103 sun3x_mayget = *(int (**)(void)) (SUN3X_P_MAYGET);
104 sun3x_mayput = *(int (**)(int)) (SUN3X_P_MAYPUT);
105 sun3x_prom_reboot = *(void (**)(void)) (SUN3X_P_REBOOT);
106 sun3x_prom_abort = *(e_vector *) (SUN3X_P_ABORT);
107 romvec = (struct linux_romvec *)SUN3X_PROM_BASE;
109 idprom_init();
111 if(!((idprom->id_machtype & SM_ARCH_MASK) == SM_SUN3X)) {
112 printk("Warning: machine reports strange type %02x\n",
113 idprom->id_machtype);
114 printk("Pretending it's a 3/80, but very afraid...\n");
115 idprom->id_machtype = SM_SUN3X | SM_3_80;
116 }
118 /* point trap #14 at abort.
119 * XXX this is futile since we restore the vbr first - oops
120 */
121 vectors[VEC_TRAP14] = sun3x_prom_abort;
123 /* If debug=prom was specified, start the debug console */
125 if (!strcmp(m68k_debug_device, "prom"))
126 register_console(&sun3x_debug);
129 }
131 /* some prom functions to export */
132 int prom_getintdefault(int node, char *property, int deflt)
133 {
134 return deflt;
135 }
137 int prom_getbool (int node, char *prop)
138 {
139 return 1;
140 }
142 void prom_printf(char *fmt, ...)
143 {
145 }
147 void prom_halt (void)
148 {
149 sun3x_halt();
150 }
152 /* Get the idprom and stuff it into buffer 'idbuf'. Returns the
153 * format type. 'num_bytes' is the number of bytes that your idbuf
154 * has space for. Returns 0xff on error.
155 */
156 unsigned char
157 prom_get_idprom(char *idbuf, int num_bytes)
158 {
159 int i;
161 /* make a copy of the idprom structure */
162 for(i = 0; i < num_bytes; i++)
163 idbuf[i] = ((char *)SUN3X_IDPROM)[i];
165 return idbuf[0];
166 }