~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/m68k/sun3x/prom.c

Version: ~ [ linux-5.12-rc1 ] ~ [ linux-5.11.2 ] ~ [ linux-5.10.19 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.101 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.177 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.222 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.258 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.258 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* Prom access routines for the sun3x */
  2 
  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>
 10 
 11 #include <asm/page.h>
 12 #include <asm/pgtable.h>
 13 #include <asm/setup.h>
 14 #include <asm/traps.h>
 15 #include <asm/sun3xprom.h>
 16 #include <asm/idprom.h>
 17 #include <asm/segment.h>
 18 #include <asm/sun3ints.h>
 19 #include <asm/openprom.h>
 20 #include <asm/machines.h>
 21 
 22 void (*sun3x_putchar)(int);
 23 int (*sun3x_getchar)(void);
 24 int (*sun3x_mayget)(void);
 25 int (*sun3x_mayput)(int);
 26 void (*sun3x_prom_reboot)(void);
 27 e_vector sun3x_prom_abort;
 28 struct linux_romvec *romvec;
 29 
 30 /* prom vector table */
 31 e_vector *sun3x_prom_vbr;
 32 
 33 /* Handle returning to the prom */
 34 void sun3x_halt(void)
 35 {
 36         unsigned long flags;
 37 
 38         /* Disable interrupts while we mess with things */
 39         local_irq_save(flags);
 40 
 41         /* Restore prom vbr */
 42         asm volatile ("movec %0,%%vbr" : : "r" ((void*)sun3x_prom_vbr));
 43 
 44         /* Restore prom NMI clock */
 45 //      sun3x_disable_intreg(5);
 46         sun3_enable_irq(7);
 47 
 48         /* Let 'er rip */
 49         asm volatile ("trap #14");
 50 
 51         /* Restore everything */
 52         sun3_disable_irq(7);
 53         sun3_enable_irq(5);
 54 
 55         asm volatile ("movec %0,%%vbr" : : "r" ((void*)vectors));
 56         local_irq_restore(flags);
 57 }
 58 
 59 void sun3x_reboot(void)
 60 {
 61         /* This never returns, don't bother saving things */
 62         local_irq_disable();
 63 
 64         /* Restore prom vbr */
 65         asm volatile ("movec %0,%%vbr" : : "r" ((void*)sun3x_prom_vbr));
 66 
 67         /* Restore prom NMI clock */
 68         sun3_disable_irq(5);
 69         sun3_enable_irq(7);
 70 
 71         /* Let 'er rip */
 72         (*romvec->pv_reboot)("vmlinux");
 73 }
 74 
 75 static void sun3x_prom_write(struct console *co, const char *s,
 76                              unsigned int count)
 77 {
 78         while (count--) {
 79                 if (*s == '\n')
 80                         sun3x_putchar('\r');
 81                 sun3x_putchar(*s++);
 82         }
 83 }
 84 
 85 /* debug console - write-only */
 86 
 87 static struct console sun3x_debug = {
 88         .name   = "debug",
 89         .write  = sun3x_prom_write,
 90         .flags  = CON_PRINTBUFFER,
 91         .index  = -1,
 92 };
 93 
 94 void __init sun3x_prom_init(void)
 95 {
 96         /* Read the vector table */
 97 
 98         sun3x_putchar = *(void (**)(int)) (SUN3X_P_PUTCHAR);
 99         sun3x_getchar = *(int (**)(void)) (SUN3X_P_GETCHAR);
100         sun3x_mayget = *(int (**)(void))  (SUN3X_P_MAYGET);
101         sun3x_mayput = *(int (**)(int))   (SUN3X_P_MAYPUT);
102         sun3x_prom_reboot = *(void (**)(void)) (SUN3X_P_REBOOT);
103         sun3x_prom_abort = *(e_vector *)  (SUN3X_P_ABORT);
104         romvec = (struct linux_romvec *)SUN3X_PROM_BASE;
105 
106         idprom_init();
107 
108         if (!((idprom->id_machtype & SM_ARCH_MASK) == SM_SUN3X)) {
109                 printk("Warning: machine reports strange type %02x\n",
110                         idprom->id_machtype);
111                 printk("Pretending it's a 3/80, but very afraid...\n");
112                 idprom->id_machtype = SM_SUN3X | SM_3_80;
113         }
114 
115         /* point trap #14 at abort.
116          * XXX this is futile since we restore the vbr first - oops
117          */
118         vectors[VEC_TRAP14] = sun3x_prom_abort;
119 }
120 
121 static int __init sun3x_debug_setup(char *arg)
122 {
123         /* If debug=prom was specified, start the debug console */
124         if (MACH_IS_SUN3X && !strcmp(arg, "prom"))
125                 register_console(&sun3x_debug);
126         return 0;
127 }
128 
129 early_param("debug", sun3x_debug_setup);
130 
131 /* some prom functions to export */
132 int prom_getintdefault(int node, char *property, int deflt)
133 {
134         return deflt;
135 }
136 
137 int prom_getbool (int node, char *prop)
138 {
139         return 1;
140 }
141 
142 void prom_printf(char *fmt, ...)
143 {
144 }
145 
146 void prom_halt (void)
147 {
148         sun3x_halt();
149 }
150 
151 /* Get the idprom and stuff it into buffer 'idbuf'.  Returns the
152  * format type.  'num_bytes' is the number of bytes that your idbuf
153  * has space for.  Returns 0xff on error.
154  */
155 unsigned char
156 prom_get_idprom(char *idbuf, int num_bytes)
157 {
158         int i;
159 
160         /* make a copy of the idprom structure */
161         for (i = 0; i < num_bytes; i++)
162                 idbuf[i] = ((char *)SUN3X_IDPROM)[i];
163 
164         return idbuf[0];
165 }
166 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp