s5_machdep.c revision 285830
1/*- 2 * Copyright (c) 2007 Bruce M. Simpson. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: releng/10.2/sys/mips/sentry5/s5_machdep.c 247297 2013-02-26 01:00:11Z attilio $"); 29 30#include "opt_ddb.h" 31 32#include <sys/param.h> 33#include <sys/conf.h> 34#include <sys/kernel.h> 35#include <sys/systm.h> 36#include <sys/imgact.h> 37#include <sys/bio.h> 38#include <sys/buf.h> 39#include <sys/bus.h> 40#include <sys/cpu.h> 41#include <sys/cons.h> 42#include <sys/exec.h> 43#include <sys/ucontext.h> 44#include <sys/proc.h> 45#include <sys/kdb.h> 46#include <sys/ptrace.h> 47#include <sys/reboot.h> 48#include <sys/signalvar.h> 49#include <sys/sysent.h> 50#include <sys/sysproto.h> 51#include <sys/user.h> 52 53#include <vm/vm.h> 54#include <vm/vm_object.h> 55#include <vm/vm_page.h> 56 57#include <machine/cache.h> 58#include <machine/clock.h> 59#include <machine/cpu.h> 60#include <machine/cpuinfo.h> 61#include <machine/cpufunc.h> 62#include <machine/cpuregs.h> 63#include <machine/hwfunc.h> 64#include <machine/intr_machdep.h> 65#include <machine/locore.h> 66#include <machine/md_var.h> 67#include <machine/pte.h> 68#include <machine/sigframe.h> 69#include <machine/trap.h> 70#include <machine/vmparam.h> 71 72#include <mips/sentry5/s5reg.h> 73 74#ifdef CFE 75#include <dev/cfe/cfe_api.h> 76#endif 77 78extern int *edata; 79extern int *end; 80 81void 82platform_cpu_init() 83{ 84 /* Nothing special */ 85} 86 87static void 88mips_init(void) 89{ 90 int i, j; 91 92 printf("entry: mips_init()\n"); 93 94#ifdef CFE 95 /* 96 * Query DRAM memory map from CFE. 97 */ 98 physmem = 0; 99 for (i = 0; i < 10; i += 2) { 100 int result; 101 uint64_t addr, len, type; 102 103 result = cfe_enummem(i, 0, &addr, &len, &type); 104 if (result < 0) { 105 phys_avail[i] = phys_avail[i + 1] = 0; 106 break; 107 } 108 if (type != CFE_MI_AVAILABLE) 109 continue; 110 111 phys_avail[i] = addr; 112 if (i == 0 && addr == 0) { 113 /* 114 * If this is the first physical memory segment probed 115 * from CFE, omit the region at the start of physical 116 * memory where the kernel has been loaded. 117 */ 118 phys_avail[i] += MIPS_KSEG0_TO_PHYS(kernel_kseg0_end); 119 } 120 phys_avail[i + 1] = addr + len; 121 physmem += len; 122 } 123 124 realmem = btoc(physmem); 125#endif 126 127 for (j = 0; j < i; j++) 128 dump_avail[j] = phys_avail[j]; 129 130 physmem = realmem; 131 132 init_param1(); 133 init_param2(physmem); 134 mips_cpu_init(); 135 pmap_bootstrap(); 136 mips_proc0_init(); 137 mutex_init(); 138 kdb_init(); 139#ifdef KDB 140 if (boothowto & RB_KDB) 141 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger"); 142#endif 143} 144 145void 146platform_reset(void) 147{ 148 149#if defined(CFE) 150 cfe_exit(0, 0); 151#else 152 *((volatile uint8_t *)MIPS_PHYS_TO_KSEG1(SENTRY5_EXTIFADR)) = 0x80; 153#endif 154} 155 156void 157platform_start(__register_t a0, __register_t a1, __register_t a2, 158 __register_t a3) 159{ 160 vm_offset_t kernend; 161 uint64_t platform_counter_freq; 162 163 /* clear the BSS and SBSS segments */ 164 kernend = (vm_offset_t)&end; 165 memset(&edata, 0, kernend - (vm_offset_t)(&edata)); 166 167 mips_postboot_fixup(); 168 169 /* Initialize pcpu stuff */ 170 mips_pcpu0_init(); 171 172#ifdef CFE 173 /* 174 * Initialize CFE firmware trampolines before 175 * we initialize the low-level console. 176 * 177 * CFE passes the following values in registers: 178 * a0: firmware handle 179 * a2: firmware entry point 180 * a3: entry point seal 181 */ 182 if (a3 == CFE_EPTSEAL) 183 cfe_init(a0, a2); 184#endif 185 cninit(); 186 187 mips_init(); 188 189# if 0 190 /* 191 * Probe the Broadcom Sentry5's on-chip PLL clock registers 192 * and discover the CPU pipeline clock and bus clock 193 * multipliers from this. 194 * XXX: Wrong place. You have to ask the ChipCommon 195 * or External Interface cores on the SiBa. 196 */ 197 uint32_t busmult, cpumult, refclock, clkcfg1; 198#define S5_CLKCFG1_REFCLOCK_MASK 0x0000001F 199#define S5_CLKCFG1_BUSMULT_MASK 0x000003E0 200#define S5_CLKCFG1_BUSMULT_SHIFT 5 201#define S5_CLKCFG1_CPUMULT_MASK 0xFFFFFC00 202#define S5_CLKCFG1_CPUMULT_SHIFT 10 203 204 counter_freq = 100000000; /* XXX */ 205 206 clkcfg1 = s5_rd_clkcfg1(); 207 printf("clkcfg1 = 0x%08x\n", clkcfg1); 208 209 refclock = clkcfg1 & 0x1F; 210 busmult = ((clkcfg1 & 0x000003E0) >> 5) + 1; 211 cpumult = ((clkcfg1 & 0xFFFFFC00) >> 10) + 1; 212 213 printf("refclock = %u\n", refclock); 214 printf("busmult = %u\n", busmult); 215 printf("cpumult = %u\n", cpumult); 216 217 counter_freq = cpumult * refclock; 218# else 219 platform_counter_freq = 200 * 1000 * 1000; /* Sentry5 is 200MHz */ 220# endif 221 222 mips_timer_init_params(platform_counter_freq, 0); 223} 224