/*- * Copyright (c) 1998 Michael Smith * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $Id$ */ #include /* XXX debugging */ extern struct console vidconsole; #define MARK(s, c) {vidconsole.c_out(s); vidconsole.c_out(c); while (!vidconsole.c_ready()) ; vidconsole.c_in();} /* * Generic device specifier; architecture-dependant * versions may be larger, but should be allowed to * overlap. */ struct devdesc { struct devsw *d_dev; int d_type; #define DEVT_NONE 0 #define DEVT_DISK 1 #define DEVT_NET 2 }; /* Commands and return values; nonzero return sets command_errmsg != NULL */ typedef int (bootblk_cmd_t)(int argc, char *argv[]); extern char *command_errmsg; extern char command_errbuf[]; /* XXX blah, length */ #define CMD_OK 0 #define CMD_ERROR 1 /* interp.c */ extern void interact(void); extern void source(char *filename); /* boot.c */ extern int autoboot(int delay, char *prompt); /* misc.c */ extern char *unargv(int argc, char *argv[]); /* * Modular console support. */ struct console { char *c_name; char *c_desc; int c_flags; #define C_PRESENTIN (1<<0) #define C_PRESENTOUT (1<<1) #define C_ACTIVEIN (1<<2) #define C_ACTIVEOUT (1<<3) void (* c_probe)(struct console *cp); /* set c_flags to match hardware */ int (* c_init)(int arg); /* reinit XXX may need more args */ void (* c_out)(int c); /* emit c */ int (* c_in)(void); /* wait for and return input */ int (* c_ready)(void); /* return nonzer if input waiting */ }; extern struct console *consoles[]; extern void cons_probe(void); /* * Module loader. */ #define MF_FORMATMASK 0xf #define MF_AOUT 0 #define MF_ELF 1 /* * Module metadata header. * * Metadata are allocated on our heap, and copied into kernel space * before executing the kernel. */ struct module_metadata { size_t md_size; u_int16_t md_type; struct module_metadata *md_next; char md_data[0]; /* data are immediately appended */ }; /* * Loaded module information. * * At least one module (the kernel) must be loaded in order to boot. * The kernel is always loaded first. */ struct loaded_module { char *m_name; /* module name */ char *m_type; /* module type, eg 'kernel', 'pnptable', etc. */ char *m_args; /* arguments for the module */ void *m_metadata; /* metadata that will be placed in the module directory */ int m_flags; /* 0xffff reserved for arch-specific use */ vm_offset_t m_addr; /* load address */ size_t m_size; /* module size */ struct loaded_module *m_next; /* next module */ }; struct module_format { int l_format; /* Load function must return EFTYPE if it can't handle the module supplied */ int (* l_load)(char *filename, vm_offset_t dest, struct loaded_module **result); int (* l_exec)(struct loaded_module *amp); }; extern struct module_format *module_formats[]; /* supplied by consumer */ extern struct loaded_module *loaded_modules; extern int mod_load(char *name, int argc, char *argv[]); extern struct loaded_module *mod_findmodule(char *name, char *type); /* XXX these belong in */ #define MODINFO_NAME 0x0000 #define MODINFO_TYPE 0x0001 #define MODINFO_ADDR 0x0002 #define MODINFO_SIZE 0x0003 #define MODINFO_METADATA 0x8000 #if defined(__ELF__) /* * Alpha GAS needs an align before the section change. It seems to assume * that after the .previous, it is aligned, so the following .align 3 is * ignored. Since the previous instructions often contain strings, this is * a problem. */ #ifdef __alpha__ #define MAKE_SET(set, sym) \ __asm(".align 3"); \ __asm(".section .set." #set ",\"aw\""); \ __asm(".quad " #sym); \ __asm(".previous") #else #define MAKE_SET(set, sym) \ __asm(".section .set." #set ",\"aw\""); \ __asm(".long " #sym); \ __asm(".previous") #endif #define TEXT_SET(set, sym) MAKE_SET(set, sym) #define DATA_SET(set, sym) MAKE_SET(set, sym) #define BSS_SET(set, sym) MAKE_SET(set, sym) #define ABS_SET(set, sym) MAKE_SET(set, sym) #else /* * Linker set support, directly from * * NB: the constants defined below must match those defined in * ld/ld.h. Since their calculation requires arithmetic, we * can't name them symbolically (e.g., 23 is N_SETT | N_EXT). */ #define MAKE_SET(set, sym, type) \ static void const * const __set_##set##_sym_##sym = &sym; \ __asm(".stabs \"_" #set "\", " #type ", 0, 0, _" #sym) #define TEXT_SET(set, sym) MAKE_SET(set, sym, 23) #define DATA_SET(set, sym) MAKE_SET(set, sym, 25) #define BSS_SET(set, sym) MAKE_SET(set, sym, 27) #define ABS_SET(set, sym) MAKE_SET(set, sym, 21) #endif struct linker_set { int ls_length; const void *ls_items[1]; /* really ls_length of them, trailing NULL */ }; /* * Support for commands */ struct bootblk_command { const char *c_name; const char *c_desc; bootblk_cmd_t *c_fn; }; #define COMMAND_SET(tag, key, desc, func) \ static bootblk_cmd_t func; \ static struct bootblk_command _cmd_ ## tag = { key, desc, func }; \ DATA_SET(Xcommand_set, _cmd_ ## tag); extern struct linker_set Xcommand_set; /* * functions called down from the generic code */ struct arch_switch { /* Automatically load modules as required by detected hardware */ int (* arch_autoload)(); /* Boot the loaded kernel (first loaded module) */ int (* arch_boot)(void); /* Locate the device for (name), return pointer to tail in (*path) */ int (*arch_getdev)(void **dev, char *name, char **path); }; extern struct arch_switch archsw;