sun4prom.c
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上传日期:2013-02-24
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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 %dn",
- sun4_romvec->monid,
- sun4_romvec->romvecversion);
- return &sun4romvec;
- }