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machdep.c revision 1.20 
      1 /*	$NetBSD: machdep.c,v 1.20 2011/06/20 17:44:33 matt Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2006 Jachym Holecek
      5  * All rights reserved.
      6  *
      7  * Written for DFC Design, s.r.o.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  *
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  *
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Based on Walnut and Explora.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.20 2011/06/20 17:44:33 matt Exp $");
     38 
     39 #include "opt_compat_netbsd.h"
     40 #include "opt_ddb.h"
     41 #include "opt_ipkdb.h"
     42 #include "opt_virtex.h"
     43 #include "opt_kgdb.h"
     44 
     45 #include <sys/param.h>
     46 #include <sys/boot_flag.h>
     47 #include <sys/buf.h>
     48 #include <sys/bus.h>
     49 #include <sys/device.h>
     50 #include <sys/exec.h>
     51 #include <sys/malloc.h>
     52 #include <sys/mbuf.h>
     53 #include <sys/module.h>
     54 #include <sys/mount.h>
     55 #include <sys/msgbuf.h>
     56 #include <sys/kernel.h>
     57 #include <sys/ksyms.h>
     58 #include <sys/proc.h>
     59 #include <sys/reboot.h>
     60 #include <sys/syscallargs.h>
     61 #include <sys/syslog.h>
     62 #include <sys/systm.h>
     63 
     64 #include <uvm/uvm_extern.h>
     65 
     66 #include <dev/cons.h>
     67 
     68 #include <machine/powerpc.h>
     69 
     70 #include <powerpc/trap.h>
     71 #include <powerpc/pcb.h>
     72 
     73 #include <powerpc/spr.h>
     74 #include <powerpc/ibm4xx/spr.h>
     75 
     76 #include <powerpc/ibm4xx/cpu.h>
     77 
     78 #include <evbppc/virtex/dcr.h>
     79 #include <evbppc/virtex/virtex.h>
     80 
     81 #include "ksyms.h"
     82 
     83 #if defined(DDB)
     84 #include <powerpc/db_machdep.h>
     85 #include <ddb/db_extern.h>
     86 #endif
     87 
     88 #if defined(KGDB)
     89 #include <sys/kgdb.h>
     90 #endif
     91 
     92 /*
     93  * Global variables used here and there
     94  */
     95 struct vm_map *phys_map = NULL;
     96 
     97 /*
     98  * This should probably be in autoconf!				XXX
     99  */
    100 char cpu_model[80];
    101 char machine[] = MACHINE;		/* from <machine/param.h> */
    102 char machine_arch[] = MACHINE_ARCH;	/* from <machine/param.h> */
    103 
    104 char bootpath[256];
    105 paddr_t msgbuf_paddr;
    106 vaddr_t msgbuf_vaddr;
    107 
    108 void initppc(vaddr_t, vaddr_t);
    109 
    110 static void dumpsys(void);
    111 
    112 /* BSS segment start & end. */
    113 extern char 		edata[], end[];
    114 
    115 /* One region holds all memory, the other is terminator expected by 405 pmap. */
    116 #define MEMREGIONS 	2
    117 struct mem_region 	physmemr[MEMREGIONS];
    118 struct mem_region 	availmemr[MEMREGIONS];
    119 
    120 /* Maximum TLB page size. */
    121 #define TLB_PG_SIZE 	(16*1024*1024)
    122 
    123 void
    124 initppc(vaddr_t startkernel, vaddr_t endkernel)
    125 {
    126 	paddr_t			addr, memsize;
    127 
    128         /* Initialize cache info for memcpy, memset, etc. */
    129         cpu_probe_cache();
    130 
    131 	memset(physmemr, 0, sizeof(physmemr)); 		/* [1].size = 0 */
    132 	memset(availmemr, 0, sizeof(availmemr)); 	/* [1].size = 0 */
    133 
    134 	memsize = (PHYSMEM * 1024 * 1024) & ~PGOFSET;
    135 
    136 	physmemr[0].start 	= 0;
    137 	physmemr[0].size 	= memsize;
    138 
    139 	availmemr[0].start 	= startkernel;
    140 	availmemr[0].size 	= memsize - availmemr[0].start;
    141 
    142 	/* Map kernel memory linearly. */
    143 	for (addr = 0; addr < endkernel; addr += TLB_PG_SIZE)
    144 		ppc4xx_tlb_reserve(addr, addr, TLB_PG_SIZE, TLB_EX);
    145 
    146 	/* Give design-specific code a hint for reserved mappings. */
    147 	virtex_machdep_init(roundup(memsize, TLB_PG_SIZE), TLB_PG_SIZE,
    148 	    physmemr, availmemr);
    149 
    150 	ibm4xx_init(startkernel, endkernel, pic_ext_intr);
    151 
    152 #ifdef DDB
    153 	if (boothowto & RB_KDB)
    154 		Debugger();
    155 #endif
    156 #ifdef IPKDB
    157 	/*
    158 	 * Now trap to IPKDB
    159 	 */
    160 	ipkdb_init();
    161 	if (boothowto & RB_KDB)
    162 		ipkdb_connect(0);
    163 #endif
    164 #ifdef KGDB
    165 	/*
    166 	 * Now trap to KGDB
    167 	 */
    168 	kgdb_connect(1);
    169 #endif /* KGDB */
    170 
    171 	/*
    172 	 * Look for the ibm4xx modules in the right place.
    173 	 */
    174 	module_machine = module_machine_ibm4xx;
    175 }
    176 
    177 /*
    178  * Machine dependent startup code.
    179  */
    180 
    181 char msgbuf[MSGBUFSIZE];
    182 
    183 void
    184 cpu_startup(void)
    185 {
    186 	/* For use by propdb. */
    187 	static u_int 	memsize = PHYSMEM * 1024 * 1024;
    188 	static u_int 	cpuspeed = CPUFREQ * 1000 * 1000;
    189 	prop_number_t 	pn;
    190 
    191 	vaddr_t 	minaddr, maxaddr;
    192 	char 		pbuf[9];
    193 
    194 	curcpu()->ci_khz = cpuspeed / 1000;
    195 
    196 	/* Initialize error message buffer. */
    197 	initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE));
    198 
    199 	printf("%s%s", copyright, version);
    200 
    201 	format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
    202 	printf("total memory = %s\n", pbuf);
    203 
    204 	minaddr = 0;
    205 	/*
    206 	 * Allocate a submap for physio
    207 	 */
    208 	phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
    209 				 VM_PHYS_SIZE, 0, false, NULL);
    210 
    211 	/*
    212 	 * No need to allocate an mbuf cluster submap.  Mbuf clusters
    213 	 * are allocated via the pool allocator, and we use direct-mapped
    214 	 * pool pages.
    215 	 */
    216 
    217 	format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
    218 	printf("avail memory = %s\n", pbuf);
    219 
    220 	/*
    221 	 * Set up the board properties database.
    222 	 */
    223 	board_info_init();
    224 
    225 	pn = prop_number_create_integer(memsize);
    226 	KASSERT(pn != NULL);
    227 	if (prop_dictionary_set(board_properties, "mem-size", pn) == false)
    228 		panic("setting mem-size");
    229 	prop_object_release(pn);
    230 
    231 	pn = prop_number_create_integer(cpuspeed);
    232 	KASSERT(pn != NULL);
    233 	if (prop_dictionary_set(board_properties, "processor-frequency",
    234 	    pn) == false)
    235 		panic("setting processor-frequency");
    236 	prop_object_release(pn);
    237 
    238 	/*
    239 	 * Now that we have VM, malloc()s are OK in bus_space.
    240 	 */
    241 	bus_space_mallocok();
    242 	fake_mapiodev = 0;
    243 }
    244 
    245 
    246 static void
    247 dumpsys(void)
    248 {
    249 	printf("dumpsys: TBD\n");
    250 }
    251 
    252 /* Hook used by 405 pmap module. */
    253 void
    254 mem_regions(struct mem_region **mem, struct mem_region **avail)
    255 {
    256 	*mem 	= physmemr;
    257 	*avail 	= availmemr;
    258 }
    259 
    260 /*
    261  * Halt or reboot the machine after syncing/dumping according to howto.
    262  */
    263 void
    264 cpu_reboot(int howto, char *what)
    265 {
    266 	static int syncing;
    267 	static char str[256];
    268 	char *ap = str, *ap1 = ap;
    269 
    270 	boothowto = howto;
    271 	if (!cold && !(howto & RB_NOSYNC) && !syncing) {
    272 		syncing = 1;
    273 		vfs_shutdown();		/* sync */
    274 		resettodr();		/* set wall clock */
    275 	}
    276 
    277 	splhigh();
    278 
    279 	if (!cold && (howto & RB_DUMP))
    280 		dumpsys();
    281 
    282 	doshutdownhooks();
    283 
    284 	pmf_system_shutdown(boothowto);
    285 
    286 	if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
    287 		/* Power off here if we know how...*/
    288 	}
    289 
    290 	if (howto & RB_HALT) {
    291 		printf("halted\n\n");
    292 
    293 		goto reboot;	/* XXX for now... */
    294 
    295 #ifdef DDB
    296 		printf("dropping to debugger\n");
    297 		while(1)
    298 			Debugger();
    299 #endif
    300 #ifdef KGDB
    301 		printf("dropping to kgdb\n");
    302 		while(1)
    303 			kgdb_connect(1);
    304 #endif
    305 	}
    306 
    307 	printf("rebooting\n\n");
    308 	if (what && *what) {
    309 		if (strlen(what) > sizeof str - 5)
    310 			printf("boot string too large, ignored\n");
    311 		else {
    312 			strcpy(str, what);
    313 			ap1 = ap = str + strlen(str);
    314 			*ap++ = ' ';
    315 		}
    316 	}
    317 	*ap++ = '-';
    318 	if (howto & RB_SINGLE)
    319 		*ap++ = 's';
    320 	if (howto & RB_KDB)
    321 		*ap++ = 'd';
    322 	*ap++ = 0;
    323 	if (ap[-2] == '-')
    324 		*ap1 = 0;
    325 
    326 	/* flush cache for msgbuf */
    327 	__syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE));
    328 
    329  reboot:
    330 	ppc4xx_reset();
    331 
    332 	printf("ppc4xx_reset() failed!\n");
    333 #ifdef DDB
    334 	while(1)
    335 		Debugger();
    336 #endif
    337 #ifdef KGDB
    338 	while(1)
    339 		kgdb_connect(1);
    340 #else
    341 	while (1)
    342 		/* nothing */;
    343 #endif
    344 }
    345