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