167 строки
3.7 KiB
C
167 строки
3.7 KiB
C
/* Prom access routines for the sun3x */
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/console.h>
|
|
#include <linux/init.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/traps.h>
|
|
#include <asm/sun3xprom.h>
|
|
#include <asm/idprom.h>
|
|
#include <asm/segment.h>
|
|
#include <asm/sun3ints.h>
|
|
#include <asm/openprom.h>
|
|
#include <asm/machines.h>
|
|
|
|
void (*sun3x_putchar)(int);
|
|
int (*sun3x_getchar)(void);
|
|
int (*sun3x_mayget)(void);
|
|
int (*sun3x_mayput)(int);
|
|
void (*sun3x_prom_reboot)(void);
|
|
e_vector sun3x_prom_abort;
|
|
struct linux_romvec *romvec;
|
|
|
|
/* prom vector table */
|
|
e_vector *sun3x_prom_vbr;
|
|
|
|
/* Handle returning to the prom */
|
|
void sun3x_halt(void)
|
|
{
|
|
unsigned long flags;
|
|
|
|
/* Disable interrupts while we mess with things */
|
|
local_irq_save(flags);
|
|
|
|
/* Restore prom vbr */
|
|
__asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)sun3x_prom_vbr));
|
|
|
|
/* Restore prom NMI clock */
|
|
// sun3x_disable_intreg(5);
|
|
sun3_enable_irq(7);
|
|
|
|
/* Let 'er rip */
|
|
__asm__ volatile ("trap #14" : : );
|
|
|
|
/* Restore everything */
|
|
sun3_disable_irq(7);
|
|
sun3_enable_irq(5);
|
|
|
|
__asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)vectors));
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
void sun3x_reboot(void)
|
|
{
|
|
/* This never returns, don't bother saving things */
|
|
local_irq_disable();
|
|
|
|
/* Restore prom vbr */
|
|
__asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)sun3x_prom_vbr));
|
|
|
|
/* Restore prom NMI clock */
|
|
sun3_disable_irq(5);
|
|
sun3_enable_irq(7);
|
|
|
|
/* Let 'er rip */
|
|
(*romvec->pv_reboot)("vmlinux");
|
|
}
|
|
|
|
extern char m68k_debug_device[];
|
|
|
|
static void sun3x_prom_write(struct console *co, const char *s,
|
|
unsigned int count)
|
|
{
|
|
while (count--) {
|
|
if (*s == '\n')
|
|
sun3x_putchar('\r');
|
|
sun3x_putchar(*s++);
|
|
}
|
|
}
|
|
|
|
/* debug console - write-only */
|
|
|
|
static struct console sun3x_debug = {
|
|
.name = "debug",
|
|
.write = sun3x_prom_write,
|
|
.flags = CON_PRINTBUFFER,
|
|
.index = -1,
|
|
};
|
|
|
|
void sun3x_prom_init(void)
|
|
{
|
|
/* Read the vector table */
|
|
|
|
sun3x_putchar = *(void (**)(int)) (SUN3X_P_PUTCHAR);
|
|
sun3x_getchar = *(int (**)(void)) (SUN3X_P_GETCHAR);
|
|
sun3x_mayget = *(int (**)(void)) (SUN3X_P_MAYGET);
|
|
sun3x_mayput = *(int (**)(int)) (SUN3X_P_MAYPUT);
|
|
sun3x_prom_reboot = *(void (**)(void)) (SUN3X_P_REBOOT);
|
|
sun3x_prom_abort = *(e_vector *) (SUN3X_P_ABORT);
|
|
romvec = (struct linux_romvec *)SUN3X_PROM_BASE;
|
|
|
|
idprom_init();
|
|
|
|
if(!((idprom->id_machtype & SM_ARCH_MASK) == SM_SUN3X)) {
|
|
printk("Warning: machine reports strange type %02x\n",
|
|
idprom->id_machtype);
|
|
printk("Pretending it's a 3/80, but very afraid...\n");
|
|
idprom->id_machtype = SM_SUN3X | SM_3_80;
|
|
}
|
|
|
|
/* point trap #14 at abort.
|
|
* XXX this is futile since we restore the vbr first - oops
|
|
*/
|
|
vectors[VEC_TRAP14] = sun3x_prom_abort;
|
|
|
|
/* If debug=prom was specified, start the debug console */
|
|
|
|
if (!strcmp(m68k_debug_device, "prom"))
|
|
register_console(&sun3x_debug);
|
|
|
|
|
|
}
|
|
|
|
/* some prom functions to export */
|
|
int prom_getintdefault(int node, char *property, int deflt)
|
|
{
|
|
return deflt;
|
|
}
|
|
|
|
int prom_getbool (int node, char *prop)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
void prom_printf(char *fmt, ...)
|
|
{
|
|
|
|
}
|
|
|
|
void prom_halt (void)
|
|
{
|
|
sun3x_halt();
|
|
}
|
|
|
|
/* Get the idprom and stuff it into buffer 'idbuf'. Returns the
|
|
* format type. 'num_bytes' is the number of bytes that your idbuf
|
|
* has space for. Returns 0xff on error.
|
|
*/
|
|
unsigned char
|
|
prom_get_idprom(char *idbuf, int num_bytes)
|
|
{
|
|
int i;
|
|
|
|
/* make a copy of the idprom structure */
|
|
for(i = 0; i < num_bytes; i++)
|
|
idbuf[i] = ((char *)SUN3X_IDPROM)[i];
|
|
|
|
return idbuf[0];
|
|
}
|