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machdep.c revision 1.21 
      1 /*	$NetBSD: machdep.c,v 1.21 2012/07/27 22:13:58 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 1.21 2012/07/27 22:13:58 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 machine[] = MACHINE;		/* from <machine/param.h> */
    101 char machine_arch[] = MACHINE_ARCH;	/* from <machine/param.h> */
    102 
    103 char bootpath[256];
    104 vaddr_t msgbuf_vaddr;
    105 
    106 void initppc(vaddr_t, vaddr_t);
    107 
    108 static void dumpsys(void);
    109 
    110 /* BSS segment start & end. */
    111 extern char 		edata[], end[];
    112 
    113 /* One region holds all memory, the other is terminator expected by 405 pmap. */
    114 #define MEMREGIONS 	2
    115 struct mem_region 	physmemr[MEMREGIONS];
    116 struct mem_region 	availmemr[MEMREGIONS];
    117 
    118 /* Maximum TLB page size. */
    119 #define TLB_PG_SIZE 	(16*1024*1024)
    120 
    121 void
    122 initppc(vaddr_t startkernel, vaddr_t endkernel)
    123 {
    124 	paddr_t			addr, memsize;
    125 
    126         /* Initialize cache info for memcpy, memset, etc. */
    127         cpu_probe_cache();
    128 
    129 	memset(physmemr, 0, sizeof(physmemr)); 		/* [1].size = 0 */
    130 	memset(availmemr, 0, sizeof(availmemr)); 	/* [1].size = 0 */
    131 
    132 	memsize = (PHYSMEM * 1024 * 1024) & ~PGOFSET;
    133 
    134 	physmemr[0].start 	= 0;
    135 	physmemr[0].size 	= memsize;
    136 
    137 	availmemr[0].start 	= startkernel;
    138 	availmemr[0].size 	= memsize - availmemr[0].start;
    139 
    140 	/* Map kernel memory linearly. */
    141 	for (addr = 0; addr < endkernel; addr += TLB_PG_SIZE)
    142 		ppc4xx_tlb_reserve(addr, addr, TLB_PG_SIZE, TLB_EX);
    143 
    144 	/* Give design-specific code a hint for reserved mappings. */
    145 	virtex_machdep_init(roundup(memsize, TLB_PG_SIZE), TLB_PG_SIZE,
    146 	    physmemr, availmemr);
    147 
    148 	ibm4xx_init(startkernel, endkernel, pic_ext_intr);
    149 
    150 #ifdef DDB
    151 	if (boothowto & RB_KDB)
    152 		Debugger();
    153 #endif
    154 #ifdef IPKDB
    155 	/*
    156 	 * Now trap to IPKDB
    157 	 */
    158 	ipkdb_init();
    159 	if (boothowto & RB_KDB)
    160 		ipkdb_connect(0);
    161 #endif
    162 #ifdef KGDB
    163 	/*
    164 	 * Now trap to KGDB
    165 	 */
    166 	kgdb_connect(1);
    167 #endif /* KGDB */
    168 
    169 	/*
    170 	 * Look for the ibm4xx modules in the right place.
    171 	 */
    172 	module_machine = module_machine_ibm4xx;
    173 }
    174 
    175 /*
    176  * Machine dependent startup code.
    177  */
    178 
    179 void
    180 cpu_startup(void)
    181 {
    182 	/* For use by propdb. */
    183 	static u_int 	memsize = PHYSMEM * 1024 * 1024;
    184 	static u_int 	cpuspeed = CPUFREQ * 1000 * 1000;
    185 	prop_number_t 	pn;
    186 
    187 	vaddr_t 	minaddr, maxaddr;
    188 	char 		pbuf[9];
    189 
    190 	curcpu()->ci_khz = cpuspeed / 1000;
    191 
    192 	/* Initialize error message buffer. */
    193 	initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE));
    194 
    195 	printf("%s%s", copyright, version);
    196 
    197 	format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
    198 	printf("total memory = %s\n", pbuf);
    199 
    200 	minaddr = 0;
    201 	/*
    202 	 * Allocate a submap for physio
    203 	 */
    204 	phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
    205 				 VM_PHYS_SIZE, 0, false, NULL);
    206 
    207 	/*
    208 	 * No need to allocate an mbuf cluster submap.  Mbuf clusters
    209 	 * are allocated via the pool allocator, and we use direct-mapped
    210 	 * pool pages.
    211 	 */
    212 
    213 	format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
    214 	printf("avail memory = %s\n", pbuf);
    215 
    216 	/*
    217 	 * Set up the board properties database.
    218 	 */
    219 	board_info_init();
    220 
    221 	pn = prop_number_create_integer(memsize);
    222 	KASSERT(pn != NULL);
    223 	if (prop_dictionary_set(board_properties, "mem-size", pn) == false)
    224 		panic("setting mem-size");
    225 	prop_object_release(pn);
    226 
    227 	pn = prop_number_create_integer(cpuspeed);
    228 	KASSERT(pn != NULL);
    229 	if (prop_dictionary_set(board_properties, "processor-frequency",
    230 	    pn) == false)
    231 		panic("setting processor-frequency");
    232 	prop_object_release(pn);
    233 
    234 	/*
    235 	 * Now that we have VM, malloc()s are OK in bus_space.
    236 	 */
    237 	bus_space_mallocok();
    238 	fake_mapiodev = 0;
    239 }
    240 
    241 
    242 static void
    243 dumpsys(void)
    244 {
    245 	printf("dumpsys: TBD\n");
    246 }
    247 
    248 /* Hook used by 405 pmap module. */
    249 void
    250 mem_regions(struct mem_region **mem, struct mem_region **avail)
    251 {
    252 	*mem 	= physmemr;
    253 	*avail 	= availmemr;
    254 }
    255 
    256 /*
    257  * Halt or reboot the machine after syncing/dumping according to howto.
    258  */
    259 void
    260 cpu_reboot(int howto, char *what)
    261 {
    262 	static int syncing;
    263 	static char str[256];
    264 	char *ap = str, *ap1 = ap;
    265 
    266 	boothowto = howto;
    267 	if (!cold && !(howto & RB_NOSYNC) && !syncing) {
    268 		syncing = 1;
    269 		vfs_shutdown();		/* sync */
    270 		resettodr();		/* set wall clock */
    271 	}
    272 
    273 	splhigh();
    274 
    275 	if (!cold && (howto & RB_DUMP))
    276 		dumpsys();
    277 
    278 	doshutdownhooks();
    279 
    280 	pmf_system_shutdown(boothowto);
    281 
    282 	if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
    283 		/* Power off here if we know how...*/
    284 	}
    285 
    286 	if (howto & RB_HALT) {
    287 		printf("halted\n\n");
    288 
    289 		goto reboot;	/* XXX for now... */
    290 
    291 #ifdef DDB
    292 		printf("dropping to debugger\n");
    293 		while(1)
    294 			Debugger();
    295 #endif
    296 #ifdef KGDB
    297 		printf("dropping to kgdb\n");
    298 		while(1)
    299 			kgdb_connect(1);
    300 #endif
    301 	}
    302 
    303 	printf("rebooting\n\n");
    304 	if (what && *what) {
    305 		if (strlen(what) > sizeof str - 5)
    306 			printf("boot string too large, ignored\n");
    307 		else {
    308 			strcpy(str, what);
    309 			ap1 = ap = str + strlen(str);
    310 			*ap++ = ' ';
    311 		}
    312 	}
    313 	*ap++ = '-';
    314 	if (howto & RB_SINGLE)
    315 		*ap++ = 's';
    316 	if (howto & RB_KDB)
    317 		*ap++ = 'd';
    318 	*ap++ = 0;
    319 	if (ap[-2] == '-')
    320 		*ap1 = 0;
    321 
    322 	/* flush cache for msgbuf */
    323 	__syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE));
    324 
    325  reboot:
    326 	ppc4xx_reset();
    327 
    328 	printf("ppc4xx_reset() failed!\n");
    329 #ifdef DDB
    330 	while(1)
    331 		Debugger();
    332 #endif
    333 #ifdef KGDB
    334 	while(1)
    335 		kgdb_connect(1);
    336 #else
    337 	while (1)
    338 		/* nothing */;
    339 #endif
    340 }
    341