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machdep.c revision 1.26 
      1 /*	$NetBSD: machdep.c,v 1.26 2021/03/29 13:14:13 rin 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 1.26 2021/03/29 13:14:13 rin Exp $");
     38 
     39 #include "opt_compat_netbsd.h"
     40 #include "opt_ddb.h"
     41 #include "opt_virtex.h"
     42 #include "opt_kgdb.h"
     43 
     44 #include <sys/param.h>
     45 #include <sys/boot_flag.h>
     46 #include <sys/buf.h>
     47 #include <sys/bus.h>
     48 #include <sys/device.h>
     49 #include <sys/exec.h>
     50 #include <sys/malloc.h>
     51 #include <sys/mbuf.h>
     52 #include <sys/module.h>
     53 #include <sys/mount.h>
     54 #include <sys/msgbuf.h>
     55 #include <sys/kernel.h>
     56 #include <sys/ksyms.h>
     57 #include <sys/proc.h>
     58 #include <sys/reboot.h>
     59 #include <sys/syscallargs.h>
     60 #include <sys/syslog.h>
     61 #include <sys/systm.h>
     62 
     63 #include <uvm/uvm_extern.h>
     64 
     65 #include <dev/cons.h>
     66 
     67 #include <machine/powerpc.h>
     68 
     69 #include <powerpc/trap.h>
     70 #include <powerpc/pcb.h>
     71 
     72 #include <powerpc/spr.h>
     73 #include <powerpc/ibm4xx/spr.h>
     74 
     75 #include <powerpc/ibm4xx/cpu.h>
     76 
     77 #include <evbppc/virtex/dcr.h>
     78 #include <evbppc/virtex/virtex.h>
     79 
     80 #include "ksyms.h"
     81 
     82 #if defined(DDB)
     83 #include <powerpc/db_machdep.h>
     84 #include <ddb/db_extern.h>
     85 #endif
     86 
     87 #if defined(KGDB)
     88 #include <sys/kgdb.h>
     89 #endif
     90 
     91 /*
     92  * Global variables used here and there
     93  */
     94 struct vm_map *phys_map = NULL;
     95 
     96 /*
     97  * This should probably be in autoconf!				XXX
     98  */
     99 char machine[] = MACHINE;		/* from <machine/param.h> */
    100 char machine_arch[] = MACHINE_ARCH;	/* from <machine/param.h> */
    101 
    102 char bootpath[256];
    103 
    104 void initppc(vaddr_t, vaddr_t);
    105 
    106 static void dumpsys(void);
    107 
    108 /* BSS segment start & end. */
    109 extern char 		edata[], end[];
    110 
    111 /* One region holds all memory, the other is terminator expected by 405 pmap. */
    112 #define MEMREGIONS 	2
    113 struct mem_region 	physmemr[MEMREGIONS];
    114 struct mem_region 	availmemr[MEMREGIONS];
    115 
    116 /* Maximum TLB page size. */
    117 #define TLB_PG_SIZE 	(16*1024*1024)
    118 
    119 void
    120 initppc(vaddr_t startkernel, vaddr_t endkernel)
    121 {
    122 	paddr_t			addr, memsize;
    123 
    124         /* Initialize cache info for memcpy, memset, etc. */
    125         cpu_probe_cache();
    126 
    127 	memset(physmemr, 0, sizeof(physmemr)); 		/* [1].size = 0 */
    128 	memset(availmemr, 0, sizeof(availmemr)); 	/* [1].size = 0 */
    129 
    130 	memsize = (PHYSMEM * 1024 * 1024) & ~PGOFSET;
    131 
    132 	physmemr[0].start 	= 0;
    133 	physmemr[0].size 	= memsize;
    134 
    135 	availmemr[0].start 	= startkernel;
    136 	availmemr[0].size 	= memsize - availmemr[0].start;
    137 
    138 	/* Map kernel memory linearly. */
    139 	for (addr = 0; addr < endkernel; addr += TLB_PG_SIZE)
    140 		ppc4xx_tlb_reserve(addr, addr, TLB_PG_SIZE, TLB_EX);
    141 
    142 	/* Give design-specific code a hint for reserved mappings. */
    143 	virtex_machdep_init(roundup(memsize, TLB_PG_SIZE), TLB_PG_SIZE,
    144 	    physmemr, availmemr);
    145 
    146 	ibm4xx_init(startkernel, endkernel, pic_ext_intr);
    147 
    148 #ifdef DDB
    149 	if (boothowto & RB_KDB)
    150 		Debugger();
    151 #endif
    152 
    153 #ifdef KGDB
    154 	/*
    155 	 * Now trap to KGDB
    156 	 */
    157 	kgdb_connect(1);
    158 #endif /* KGDB */
    159 
    160 	/*
    161 	 * Look for the ibm4xx modules in the right place.
    162 	 */
    163 	module_machine = module_machine_ibm4xx;
    164 }
    165 
    166 /*
    167  * Machine dependent startup code.
    168  */
    169 
    170 void
    171 cpu_startup(void)
    172 {
    173 	/* For use by propdb. */
    174 	static u_int 	memsize = PHYSMEM * 1024 * 1024;
    175 	static u_int 	cpuspeed = CPUFREQ * 1000 * 1000;
    176 	prop_number_t 	pn;
    177 
    178 	vaddr_t 	minaddr, maxaddr;
    179 	char 		pbuf[9];
    180 
    181 	curcpu()->ci_khz = cpuspeed / 1000;
    182 
    183 	/* Initialize error message buffer. */
    184 	initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE));
    185 
    186 	printf("%s%s", copyright, version);
    187 
    188 	format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
    189 	printf("total memory = %s\n", pbuf);
    190 
    191 	minaddr = 0;
    192 	/*
    193 	 * Allocate a submap for physio
    194 	 */
    195 	phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
    196 				 VM_PHYS_SIZE, 0, false, NULL);
    197 
    198 	/*
    199 	 * No need to allocate an mbuf cluster submap.  Mbuf clusters
    200 	 * are allocated via the pool allocator, and we use direct-mapped
    201 	 * pool pages.
    202 	 */
    203 
    204 	format_bytes(pbuf, sizeof(pbuf), ptoa(uvm_availmem(false)));
    205 	printf("avail memory = %s\n", pbuf);
    206 
    207 	/*
    208 	 * Set up the board properties database.
    209 	 */
    210 	board_info_init();
    211 
    212 	pn = prop_number_create_integer(memsize);
    213 	KASSERT(pn != NULL);
    214 	if (prop_dictionary_set(board_properties, "mem-size", pn) == false)
    215 		panic("setting mem-size");
    216 	prop_object_release(pn);
    217 
    218 	pn = prop_number_create_integer(cpuspeed);
    219 	KASSERT(pn != NULL);
    220 	if (prop_dictionary_set(board_properties, "processor-frequency",
    221 	    pn) == false)
    222 		panic("setting processor-frequency");
    223 	prop_object_release(pn);
    224 
    225 	/*
    226 	 * Now that we have VM, malloc()s are OK in bus_space.
    227 	 */
    228 	bus_space_mallocok();
    229 	fake_mapiodev = 0;
    230 }
    231 
    232 
    233 static void
    234 dumpsys(void)
    235 {
    236 	printf("dumpsys: TBD\n");
    237 }
    238 
    239 /* Hook used by 405 pmap module. */
    240 void
    241 mem_regions(struct mem_region **mem, struct mem_region **avail)
    242 {
    243 	*mem 	= physmemr;
    244 	*avail 	= availmemr;
    245 }
    246 
    247 /*
    248  * Halt or reboot the machine after syncing/dumping according to howto.
    249  */
    250 void
    251 cpu_reboot(int howto, char *what)
    252 {
    253 	static int syncing;
    254 	static char str[256];
    255 	char *ap = str, *ap1 = ap;
    256 
    257 	boothowto = howto;
    258 	if (!cold && !(howto & RB_NOSYNC) && !syncing) {
    259 		syncing = 1;
    260 		vfs_shutdown();		/* sync */
    261 		resettodr();		/* set wall clock */
    262 	}
    263 
    264 	splhigh();
    265 
    266 	if (!cold && (howto & RB_DUMP))
    267 		dumpsys();
    268 
    269 	doshutdownhooks();
    270 
    271 	pmf_system_shutdown(boothowto);
    272 
    273 	if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
    274 		/* Power off here if we know how...*/
    275 	}
    276 
    277 	if (howto & RB_HALT) {
    278 		printf("halted\n\n");
    279 
    280 		goto reboot;	/* XXX for now... */
    281 
    282 #ifdef DDB
    283 		printf("dropping to debugger\n");
    284 		while(1)
    285 			Debugger();
    286 #endif
    287 #ifdef KGDB
    288 		printf("dropping to kgdb\n");
    289 		while(1)
    290 			kgdb_connect(1);
    291 #endif
    292 	}
    293 
    294 	printf("rebooting\n\n");
    295 	if (what && *what) {
    296 		if (strlen(what) > sizeof str - 5)
    297 			printf("boot string too large, ignored\n");
    298 		else {
    299 			strcpy(str, what);
    300 			ap1 = ap = str + strlen(str);
    301 			*ap++ = ' ';
    302 		}
    303 	}
    304 	*ap++ = '-';
    305 	if (howto & RB_SINGLE)
    306 		*ap++ = 's';
    307 	if (howto & RB_KDB)
    308 		*ap++ = 'd';
    309 	*ap++ = 0;
    310 	if (ap[-2] == '-')
    311 		*ap1 = 0;
    312 
    313 	/* flush cache for msgbuf */
    314 	__syncicache((void *)msgbuf_paddr, round_page(MSGBUFSIZE));
    315 
    316  reboot:
    317 	ppc4xx_reset();
    318 
    319 	printf("ppc4xx_reset() failed!\n");
    320 #ifdef DDB
    321 	while(1)
    322 		Debugger();
    323 #endif
    324 #ifdef KGDB
    325 	while(1)
    326 		kgdb_connect(1);
    327 #else
    328 	while (1)
    329 		/* nothing */;
    330 #endif
    331 }
    332