diff options
Diffstat (limited to 'sys/arch/mvme88k/m88k/m1x7_init.c')
| -rw-r--r-- | sys/arch/mvme88k/m88k/m1x7_init.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/sys/arch/mvme88k/m88k/m1x7_init.c b/sys/arch/mvme88k/m88k/m1x7_init.c new file mode 100644 index 00000000000..705221fc098 --- /dev/null +++ b/sys/arch/mvme88k/m88k/m1x7_init.c @@ -0,0 +1,205 @@ +/* + * Mach Operating System + * Copyright (c) 1993-1991 Carnegie Mellon University + * Copyright (c) 1991 OMRON Corporation + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON AND OMRON DISCLAIM ANY LIABILITY OF ANY KIND + * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie the + * rights to redistribute these changes. + */ +/* + * HISTORY + */ + +/* + * Basic initialization for vme187. + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/proc.h> +#include <sys/user.h> +#include <sys/reboot.h> +#include <sys/exec.h> +#include <vm/pmap.h> +#include <machine/vmparam.h> +#include <machine/cpu.h> +#include <machine/bug.h> + +#define INITIAL_MHZ_GUESS 25.0 + +struct bugenv bugargs; +struct kernel{ + void *entry; + void *symtab; + void *esym; + int bflags; + int bdev; + char *kname; + void *smini; + void *emini; + void *end_load; +}kflags; +char *esym; + +int boothowto; /* read in kern/bootstrap */ +int machineid; + +#ifndef roundup +#define roundup(value, stride) (((unsigned)(value) + (stride) - 1) & ~((stride)-1)) +#endif /* roundup */ + +vm_size_t mem_size; +vm_size_t rawmem_size; +vm_offset_t first_addr = 0; +vm_offset_t last_addr = 0; + +vm_offset_t avail_start, avail_next, avail_end; +vm_offset_t virtual_avail, virtual_end; + +void *end_loaded; +int bootdev; +int no_symbols; +vm_offset_t miniroot; + +struct proc *lastproc; +pcb_t curpcb; + +void cmmu_init(void); + +double cycles_per_microsecond = INITIAL_MHZ_GUESS; + +extern struct user *proc0paddr; + +int bcd2int __P((unsigned int)); + +/* + * Called from locore.S during boot, + * this is the first C code that's run. + */ + +void +m187_bootstrap(void) +{ + extern char version[]; + extern char *edata, *end; + extern int cold; + extern int kernelstart; + extern vm_offset_t size_memory(void); + struct bugbrdid brdid; + + cold = 1; /* we are still booting */ + + bugbrdid(&brdid); + machineid = brdid.brdno; + + vm_set_page_size(); + +#if 0 + esym = kflags.esym; + boothowto = kflags.bflags; + bootdev = kflags.bdev; +#endif /* 0 */ + +#if 0 + end_loaded = kflags.end_load; + if (esym != NULL) { + end = (char *)((int)(kflags.symtab)); + } else { + first_addr = (vm_offset_t)&end; + } +#endif + + first_addr = m88k_round_page(first_addr); + + if (!no_symbols) + boothowto |= RB_KDB; + + printf("about to probe\n"); +#if 1 + last_addr = size_memory(); +#else + last_addr = (vm_offset_t)0x01000000; + physmem = btoc(last_addr); +#endif + + printf("probing done\n"); + cmmu_init(); + + avail_start = first_addr; + avail_end = last_addr; + printf("%s",version); + printf("M187 boot: memory from 0x%x to 0x%x\n", avail_start, avail_end); + + /* + * Steal one page at the top of physical memory for msgbuf + */ + + avail_end -= PAGE_SIZE; + + pmap_bootstrap((vm_offset_t)&kernelstart - GOOFYLDOFFSET /* loadpt */, + &avail_start, &avail_end, &virtual_avail, + &virtual_end); + printf("returned from pmap_bootstrap\n"); + + /* + * Must initialize p_addr before autoconfig or + * the fault handler will get a NULL reference. + */ + proc0.p_addr = proc0paddr; + curproc = &proc0; + curpcb = &proc0paddr->u_pcb; + + /* Initialize cached PTEs for u-area mapping. */ + save_u_area(&proc0, proc0paddr); + + /* + * Map proc0's u-area at the standard address (UADDR). + */ + load_u_area(&proc0); + + /* Initialize the "u-area" pages. */ + bzero((caddr_t)UADDR, UPAGES*NBPG); + printf("returning from init\n"); +} + +#ifdef notneeded +ipow(int base, int i) +{ + int cnt = 1; + while (i--) { + cnt *= base; + } + return cnt; +} + +int +bcd2int(unsigned int i) +{ + unsigned val = 0; + int cnt = 0; + while (i) { + val += (i&0xf) * ipow(10,cnt); + cnt++; + i >>= 4; + } + return val; +} +#endif /* notneeded */ |