malta_machdep.c revision 216318
1168054Sflz/*- 2168054Sflz * Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org> 3168054Sflz * All rights reserved. 4168054Sflz * 5168064Sflz * Redistribution and use in source and binary forms, with or without 6168064Sflz * modification, are permitted provided that the following conditions 7168064Sflz * are met: 8168064Sflz * 1. Redistributions of source code must retain the above copyright 9168064Sflz * notice, this list of conditions and the following disclaimer. 10168064Sflz * 2. Redistributions in binary form must reproduce the above copyright 11168064Sflz * notice, this list of conditions and the following disclaimer in the 12168064Sflz * documentation and/or other materials provided with the distribution. 13168064Sflz * 14168064Sflz * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15168064Sflz * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16168064Sflz * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17168064Sflz * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18168064Sflz * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19168054Sflz * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20168054Sflz * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21168064Sflz * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22168054Sflz * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23168180Srwatson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24168151Sphk * SUCH DAMAGE. 25168153Simp * 26168151Sphk * $FreeBSD: head/sys/mips/malta/malta_machdep.c 216318 2010-12-09 07:01:03Z gonzo $ 27168153Simp */ 28168153Simp#include <sys/cdefs.h> 29168153Simp__FBSDID("$FreeBSD: head/sys/mips/malta/malta_machdep.c 216318 2010-12-09 07:01:03Z gonzo $"); 30168153Simp 31168153Simp#include "opt_ddb.h" 32168180Srwatson 33168127Sdwmalone#include <sys/param.h> 34168180Srwatson#include <sys/conf.h> 35168153Simp#include <sys/kernel.h> 36168153Simp#include <sys/systm.h> 37168127Sdwmalone#include <sys/imgact.h> 38168054Sflz#include <sys/bio.h> 39168054Sflz#include <sys/buf.h> 40168054Sflz#include <sys/bus.h> 41168054Sflz#include <sys/cpu.h> 42168149Simp#include <sys/cons.h> 43168149Simp#include <sys/exec.h> 44168179Sgabor#include <sys/ucontext.h> 45168083Sjkim#include <sys/proc.h> 46168123Snetchild#include <sys/kdb.h> 47168080Smlaier#include <sys/ptrace.h> 48168131Sbmah#include <sys/reboot.h> 49168080Smlaier#include <sys/signalvar.h> 50168150Srwatson#include <sys/sysent.h> 51168149Simp#include <sys/sysproto.h> 52168150Srwatson#include <sys/user.h> 53168054Sflz 54168060Sdds#include <vm/vm.h> 55168108Srafan#include <vm/vm_object.h> 56168083Sjkim#include <vm/vm_page.h> 57168153Simp#include <vm/vm_pager.h> 58168080Smlaier 59168149Simp#include <machine/clock.h> 60168127Sdwmalone#include <machine/cpu.h> 61168180Srwatson#include <machine/cpuregs.h> 62168149Simp#include <machine/hwfunc.h> 63168127Sdwmalone#include <machine/md_var.h> 64168054Sflz#include <machine/pmap.h> 65168150Srwatson#include <machine/trap.h> 66168081Sle 67168154Sgshapiro#ifdef TICK_USE_YAMON_FREQ 68168127Sdwmalone#include <mips/malta/yamon.h> 69168144Simp#endif 70168080Smlaier 71168150Srwatson#ifdef TICK_USE_MALTA_RTC 72168153Simp#include <mips/mips4k/malta/maltareg.h> 73168083Sjkim#include <dev/mc146818/mc146818reg.h> 74168111Smatteo#include <isa/rtc.h> 75168149Simp#endif 76168151Sphk 77168149Simp#include <mips/malta/maltareg.h> 78168180Srwatson 79168150Srwatsonextern int *edata; 80168081Sleextern int *end; 81168180Srwatson 82168167Sphilipvoid lcd_init(void); 83168142Srwatsonvoid lcd_puts(char *); 84168143Smjacobvoid malta_reset(void); 85168080Smlaier 86168149Simp/* 87168130Sdelphij * Offsets to MALTA LCD characters. 88168123Snetchild */ 89168171Sphilipstatic int malta_lcd_offs[] = { 90168097Sle MALTA_ASCIIPOS0, 91168149Simp MALTA_ASCIIPOS1, 92168127Sdwmalone MALTA_ASCIIPOS2, 93168111Smatteo MALTA_ASCIIPOS3, 94168151Sphk MALTA_ASCIIPOS4, 95168101Sandre MALTA_ASCIIPOS5, 96168108Srafan MALTA_ASCIIPOS6, 97168149Simp MALTA_ASCIIPOS7 98168149Simp}; 99168149Simp 100168140Srwatsonvoid 101168118Srseplatform_cpu_init() 102168140Srwatson{ 103168080Smlaier /* Nothing special */ 104168149Simp} 105168081Sle 106168167Sphilip/* 107168149Simp * Put character to Malta LCD at given position. 108168115Ssimon */ 109168150Srwatsonstatic void 110168149Simpmalta_lcd_putc(int pos, char c) 111168080Smlaier{ 112168180Srwatson void *addr; 113168141Swilko char *ch; 114168180Srwatson 115168054Sflz if (pos < 0 || pos > 7) 116168151Sphk return; 117168151Sphk addr = (void *)(MALTA_ASCII_BASE + malta_lcd_offs[pos]); 118168151Sphk ch = (char *)MIPS_PHYS_TO_KSEG0(addr); 119168054Sflz *ch = c; 120168064Sflz} 121168064Sflz 122168054Sflz/* 123168151Sphk * Print given string on LCD. 124168151Sphk */ 125168151Sphkstatic void 126168151Sphkmalta_lcd_print(char *str) 127168151Sphk{ 128168151Sphk int i; 129168151Sphk 130168101Sandre if (str == NULL) 131168101Sandre return; 132168083Sjkim 133168083Sjkim for (i = 0; *str != '\0'; i++, str++) 134168152Srwatson malta_lcd_putc(i, *str); 135168152Srwatson} 136168152Srwatson 137168152Srwatsonvoid 138168152Srwatsonlcd_init(void) 139168152Srwatson{ 140168152Srwatson malta_lcd_print("FreeBSD_"); 141168152Srwatson} 142168080Smlaier 143168080Smlaiervoid 144168080Smlaierlcd_puts(char *s) 145168080Smlaier{ 146168152Srwatson malta_lcd_print(s); 147168152Srwatson} 148168140Srwatson 149168140Srwatson#ifdef TICK_USE_MALTA_RTC 150168101Sandrestatic __inline uint8_t 151168115Ssimonrtcin(uint8_t addr) 152168101Sandre{ 153168152Srwatson 154168152Srwatson *((volatile uint8_t *) 155168108Srafan MIPS_PHYS_TO_KSEG1(MALTA_PCI0_ADDR(MALTA_RTCADR))) = addr; 156168108Srafan return (*((volatile uint8_t *) 157168083Sjkim MIPS_PHYS_TO_KSEG1(MALTA_PCI0_ADDR(MALTA_RTCDAT)))); 158168147Sdes} 159168147Sdes 160168083Sjkimstatic __inline void 161168147Sdeswritertc(uint8_t addr, uint8_t val) 162168140Srwatson{ 163168140Srwatson 164168127Sdwmalone *((volatile uint8_t *) 165168127Sdwmalone MIPS_PHYS_TO_KSEG1(MALTA_PCI0_ADDR(MALTA_RTCADR))) = addr; 166168127Sdwmalone *((volatile uint8_t *) 167168140Srwatson MIPS_PHYS_TO_KSEG1(MALTA_PCI0_ADDR(MALTA_RTCDAT))) = val; 168168140Srwatson} 169168140Srwatson#endif 170168149Simp 171168149Simpstatic void 172168156Sbmahmips_init(void) 173168149Simp{ 174168149Simp int i; 175168149Simp 176168149Simp for (i = 0; i < 10; i++) { 177168149Simp phys_avail[i] = 0; 178168149Simp } 179168149Simp 180168149Simp /* phys_avail regions are in bytes */ 181168149Simp phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end); 182168149Simp phys_avail[1] = ctob(realmem); 183168149Simp 184168149Simp dump_avail[0] = phys_avail[0]; 185168149Simp dump_avail[1] = phys_avail[1] - phys_avail[0]; 186168149Simp 187168149Simp physmem = realmem; 188168149Simp 189168149Simp init_param1(); 190168149Simp init_param2(physmem); 191168149Simp mips_cpu_init(); 192168149Simp pmap_bootstrap(); 193168080Smlaier mips_proc0_init(); 194168150Srwatson mutex_init(); 195168150Srwatson kdb_init(); 196168150Srwatson#ifdef KDB 197168150Srwatson if (boothowto & RB_KDB) 198168150Srwatson kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger"); 199168180Srwatson#endif 200168080Smlaier} 201168152Srwatson 202168150Srwatsonvoid 203168152Srwatsonplatform_halt(void) 204168150Srwatson{ 205168144Simp 206168152Srwatson} 207168151Sphk 208168151Sphk 209168144Simpvoid 210168180Srwatsonplatform_identify(void) 211168180Srwatson{ 212168081Sle 213168123Snetchild} 214168081Sle 215168143Smjacob/* 216168167Sphilip * Perform a board-level soft-reset. 217168143Smjacob * Note that this is not emulated by gxemul. 218168081Sle */ 219168081Slevoid 220168152Srwatsonplatform_reset(void) 221168152Srwatson{ 222168080Smlaier char *c; 223168080Smlaier 224168080Smlaier c = (char *)MIPS_PHYS_TO_KSEG0(MALTA_SOFTRES); 225168080Smlaier *c = MALTA_GORESET; 226168180Srwatson} 227168180Srwatson 228168130Sdelphijvoid 229168130Sdelphijplatform_trap_enter(void) 230168123Snetchild{ 231168123Snetchild 232168167Sphilip} 233168111Smatteo 234168167Sphilipvoid 235168111Smatteoplatform_trap_exit(void) 236168152Srwatson{ 237168152Srwatson 238168152Srwatson} 239168152Srwatson 240168080Smlaierstatic uint64_t 241168080Smlaiermalta_cpu_freq(void) 242168152Srwatson{ 243168152Srwatson uint64_t platform_counter_freq = 0; 244168152Srwatson 245168152Srwatson#if defined(TICK_USE_YAMON_FREQ) 246168111Smatteo /* 247168111Smatteo * If we are running on a board which uses YAMON firmware, 248168111Smatteo * then query CPU pipeline clock from the syscon object. 249168140Srwatson * If unsuccessful, use hard-coded default. 250168156Sbmah */ 251168140Srwatson platform_counter_freq = yamon_getcpufreq(); 252168140Srwatson 253168140Srwatson#elif defined(TICK_USE_MALTA_RTC) 254168140Srwatson /* 255168140Srwatson * If we are running on a board with the MC146818 RTC, 256168140Srwatson * use it to determine CPU pipeline clock frequency. 257168140Srwatson */ 258168140Srwatson u_int64_t counterval[2]; 259168152Srwatson 260168140Srwatson /* Set RTC to binary mode. */ 261168180Srwatson writertc(RTC_STATUSB, (rtcin(RTC_STATUSB) | RTCSB_BCD)); 262168140Srwatson 263168140Srwatson /* Busy-wait for falling edge of RTC update. */ 264168101Sandre while (((rtcin(RTC_STATUSA) & RTCSA_TUP) == 0)) 265168080Smlaier ; 266168150Srwatson while (((rtcin(RTC_STATUSA)& RTCSA_TUP) != 0)) 267168080Smlaier ; 268168060Sdds counterval[0] = mips_rd_count(); 269168054Sflz 270168180Srwatson /* Busy-wait for falling edge of RTC update. */ 271168180Srwatson while (((rtcin(RTC_STATUSA) & RTCSA_TUP) == 0)) 272168180Srwatson ; 273168180Srwatson while (((rtcin(RTC_STATUSA)& RTCSA_TUP) != 0)) 274168127Sdwmalone ; 275168127Sdwmalone counterval[1] = mips_rd_count(); 276168127Sdwmalone 277168140Srwatson platform_counter_freq = counterval[1] - counterval[0]; 278168140Srwatson#endif 279168054Sflz 280 if (platform_counter_freq == 0) 281 platform_counter_freq = MIPS_DEFAULT_HZ; 282 283 return (platform_counter_freq); 284} 285 286void 287platform_start(__register_t a0, __register_t a1, __register_t a2, 288 __register_t a3) 289{ 290 vm_offset_t kernend; 291 uint64_t platform_counter_freq; 292 int argc = a0; 293 char **argv = (char **)a1; 294 char **envp = (char **)a2; 295 unsigned int memsize = a3; 296 int i; 297 298 /* clear the BSS and SBSS segments */ 299 kernend = (vm_offset_t)&end; 300 memset(&edata, 0, kernend - (vm_offset_t)(&edata)); 301 302 mips_postboot_fixup(); 303 304 mips_pcpu0_init(); 305 platform_counter_freq = malta_cpu_freq(); 306 mips_timer_early_init(platform_counter_freq); 307 308 cninit(); 309 printf("entry: platform_start()\n"); 310 311 bootverbose = 1; 312 if (bootverbose) { 313 printf("cmd line: "); 314 for (i = 0; i < argc; i++) 315 printf("%s ", argv[i]); 316 printf("\n"); 317 318 printf("envp:\n"); 319 for (i = 0; envp[i]; i += 2) 320 printf("\t%s = %s\n", envp[i], envp[i+1]); 321 322 printf("memsize = %08x\n", memsize); 323 } 324 325 realmem = btoc(memsize); 326 mips_init(); 327 328 mips_timer_init_params(platform_counter_freq, 0); 329} 330