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/*
* Copyright (C) 1996 The Australian National University.
* Copyright (C) 1996 Fujitsu Laboratories Limited
* Copyright (C) 1997 Michael A. Griffith (grif@acm.org)
* Copyright (C) 1997 Sun Weenie (ko@ko.reno.nv.us)
* Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*
* This software may be distributed under the terms of the Gnu
* Public License version 2 or later
*
* fake a really simple Sun prom for the SUN4
*/
#include <linux/kernel.h>
#include <linux/string.h>
#include <asm/oplib.h>
#include <asm/idprom.h>
#include <asm/machines.h>
#include <asm/sun4prom.h>
#include <asm/asi.h>
#include <asm/contregs.h>
#include <linux/init.h>
static struct linux_romvec sun4romvec;
static struct idprom sun4_idprom;
struct property {
char *name;
char *value;
int length;
};
struct node {
int level;
struct property *properties;
};
struct property null_properties = { NULL, NULL, -1 };
struct property root_properties[] = {
{"device_type", "cpu", 4},
{"idprom", (char *)&sun4_idprom, sizeof(struct idprom)},
{NULL, NULL, -1}
};
struct node nodes[] = {
{ 0, &null_properties },
{ 0, root_properties },
{ -1,&null_properties }
};
static int no_nextnode(int node)
{
if (nodes[node].level == nodes[node+1].level)
return node+1;
return -1;
}
static int no_child(int node)
{
if (nodes[node].level == nodes[node+1].level-1)
return node+1;
return -1;
}
static struct property *find_property(int node,char *name)
{
struct property *prop = &nodes[node].properties[0];
while (prop && prop->name) {
if (strcmp(prop->name,name) == 0) return prop;
prop++;
}
return NULL;
}
static int no_proplen(int node,char *name)
{
struct property *prop = find_property(node,name);
if (prop) return prop->length;
return -1;
}
static int no_getprop(int node,char *name,char *value)
{
struct property *prop = find_property(node,name);
if (prop) {
memcpy(value,prop->value,prop->length);
return 1;
}
return -1;
}
static int no_setprop(int node,char *name,char *value,int len)
{
return -1;
}
static char *no_nextprop(int node,char *name)
{
struct property *prop = find_property(node,name);
if (prop) return prop[1].name;
return NULL;
}
static struct linux_nodeops sun4_nodeops = {
no_nextnode,
no_child,
no_proplen,
no_getprop,
no_setprop,
no_nextprop
};
static int synch_hook;
struct linux_romvec * __init sun4_prom_init(void)
{
int i;
unsigned char x;
char *p;
p = (char *)&sun4_idprom;
for (i = 0; i < sizeof(sun4_idprom); i++) {
__asm__ __volatile__ ("lduba [%1] %2, %0" : "=r" (x) :
"r" (AC_IDPROM + i), "i" (ASI_CONTROL));
*p++ = x;
}
memset(&sun4romvec,0,sizeof(sun4romvec));
sun4_romvec = (linux_sun4_romvec *) SUN4_PROM_VECTOR;
sun4romvec.pv_romvers = 40;
sun4romvec.pv_nodeops = &sun4_nodeops;
sun4romvec.pv_reboot = sun4_romvec->reboot;
sun4romvec.pv_abort = sun4_romvec->abortentry;
sun4romvec.pv_halt = sun4_romvec->exittomon;
sun4romvec.pv_synchook = (void (**)(void))&synch_hook;
sun4romvec.pv_setctxt = sun4_romvec->setcxsegmap;
sun4romvec.pv_v0bootargs = sun4_romvec->bootParam;
sun4romvec.pv_nbgetchar = sun4_romvec->mayget;
sun4romvec.pv_nbputchar = sun4_romvec->mayput;
sun4romvec.pv_stdin = sun4_romvec->insource;
sun4romvec.pv_stdout = sun4_romvec->outsink;
/*
* We turn on the LEDs to let folks without monitors or
* terminals know we booted. Nothing too fancy now. They
* are all on, except for LED 5, which blinks. When we
* have more time, we can teach the penguin to say "By your
* command" or "Activating turbo boost, Michael". :-)
*/
sun4_romvec->setLEDs(0x0);
printk("PROMLIB: Old Sun4 boot PROM monitor %s, romvec version %d\n",
sun4_romvec->monid,
sun4_romvec->romvecversion);
return &sun4romvec;
}
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