init.c
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上传日期:2013-02-24
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文件大小:2k
- /*
- * 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.
- *
- * PROM library initialisation code.
- *
- * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
- */
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <asm/sgialib.h>
- #undef DEBUG_PROM_INIT
- /* Master romvec interface. */
- struct linux_romvec *romvec;
- struct linux_promblock *sgi_pblock;
- int prom_argc;
- char **prom_argv, **prom_envp;
- unsigned short prom_vers, prom_rev;
- extern void prom_testtree(void);
- extern void arc_setup_console(void);
- void __init prom_init(int argc, char **argv, char **envp, int *prom_vec)
- {
- struct linux_promblock *pb;
- romvec = ROMVECTOR;
- pb = sgi_pblock = PROMBLOCK;
- prom_argc = argc;
- prom_argv = argv;
- prom_envp = envp;
- #if 0
- /* arc_printf should not use prom_printf as soon as we free
- * the prom buffers - This horribly breaks on Indys with framebuffer
- * as it simply stops after initialising swap - On the Indigo2 serial
- * console you will get A LOT illegal instructions - Only enable
- * this for early init crashes - This also brings up artefacts of
- * printing everything twice on serial console and on GFX Console
- * this has the effect of having the prom printing everything
- * in the small rectangle and the kernel printing around.
- */
- arc_setup_console();
- #endif
- if (pb->magic != 0x53435241) {
- prom_printf("Aieee, bad prom vector magic %08lxn", pb->magic);
- while(1)
- ;
- }
- prom_init_cmdline();
- prom_vers = pb->ver;
- prom_rev = pb->rev;
- prom_identify_arch();
- printk("PROMLIB: ARC firmware Version %d Revision %dn",
- prom_vers, prom_rev);
- prom_meminit();
- #ifdef DEBUG_PROM_INIT
- {
- prom_printf("Press a key to rebootn");
- (void) prom_getchar();
- romvec->imode();
- }
- #endif
- }