main.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:3k
- /*
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2000-2001 Silicon Graphics, Inc. All rights reserved.
- */
- #include <linux/config.h>
- #include <linux/types.h>
- #include <asm/bitops.h>
- extern void klgraph_init(void);
- void bedrock_init(int);
- void synergy_init(int, int);
- void sys_fw_init (const char *args, int arglen, int bsp);
- volatile int bootmaster=0; /* Used to pick bootmaster */
- volatile int nasidmaster[128]={0}; /* Used to pick node/synergy masters */
- int init_done=0;
- extern int bsp_lid;
- #define get_bit(b,p) (((*p)>>(b))&1)
- int
- fmain(int lid, int bsp) {
- int syn, nasid, cpu;
- /*
- * First lets figure out who we are. This is done from the
- * LID passed to us.
- */
- #ifdef CONFIG_IA64_SGI_SN1
- nasid = (lid>>24);
- syn = (lid>>17)&1;
- cpu = (lid>>16)&1;
- /*
- * Now pick a synergy master to initialize synergy registers.
- */
- if (test_and_set_bit(syn, &nasidmaster[nasid]) == 0) {
- synergy_init(nasid, syn);
- test_and_set_bit(syn+2, &nasidmaster[nasid]);
- } else
- while (get_bit(syn+2, &nasidmaster[nasid]) == 0);
- #else
- nasid = (lid>>16)&0xfff;
- cpu = (lid>>28)&3;
- syn = 0;
- #endif
-
- /*
- * Now pick a nasid master to initialize Bedrock registers.
- */
- if (test_and_set_bit(8, &nasidmaster[nasid]) == 0) {
- bedrock_init(nasid);
- test_and_set_bit(9, &nasidmaster[nasid]);
- } else
- while (get_bit(9, &nasidmaster[nasid]) == 0);
-
- /*
- * Now pick a BSP & finish init.
- */
- if (test_and_set_bit(0, &bootmaster) == 0) {
- sys_fw_init(0, 0, bsp);
- test_and_set_bit(1, &bootmaster);
- } else
- while (get_bit(1, &bootmaster) == 0);
- return (lid == bsp_lid);
- }
- void
- bedrock_init(int nasid)
- {
- nasid = nasid; /* to quiet gcc */
- #if 0
- /*
- * Undef if you need fprom to generate a 1 node klgraph
- * information .. only works for 1 node for nasid 0.
- */
- klgraph_init();
- #endif
- }
- void
- synergy_init(int nasid, int syn)
- {
- long *base;
- long off;
- /*
- * Enable all FSB flashed interrupts.
- * ZZZ - I'd really like defines for this......
- */
- base = (long*)0x80000e0000000000LL; /* base of synergy regs */
- for (off = 0x2a0; off < 0x2e0; off+=8) /* offset for VEC_MASK_{0-3}_A/B */
- *(base+off/8) = -1LL;
- /*
- * Set the NASID in the FSB_CONFIG register.
- */
- base = (long*)0x80000e0000000450LL;
- *base = (long)((nasid<<16)|(syn<<9));
- }
- /* Why isnt there a bcopy/memcpy in lib64.a */
- void*
- memcpy(void * dest, const void *src, size_t count)
- {
- char *s, *se, *d;
- for(d=dest, s=(char*)src, se=s+count; s<se; s++, d++)
- *d = *s;
- return dest;
- }