s5_machdep.c revision 232853
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: head/sys/mips/sentry5/s5_machdep.c 232853 2012-03-12 07:34:15Z jmallett $"); 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#include <vm/vm_pager.h> 57 58#include <machine/cache.h> 59#include <machine/clock.h> 60#include <machine/cpu.h> 61#include <machine/cpuinfo.h> 62#include <machine/cpufunc.h> 63#include <machine/cpuregs.h> 64#include <machine/hwfunc.h> 65#include <machine/intr_machdep.h> 66#include <machine/locore.h> 67#include <machine/md_var.h> 68#include <machine/pte.h> 69#include <machine/sigframe.h> 70#include <machine/trap.h> 71#include <machine/vmparam.h> 72 73#include <mips/sentry5/s5reg.h> 74 75#ifdef CFE 76#include <dev/cfe/cfe_api.h> 77#endif 78 79extern int *edata; 80extern int *end; 81 82void 83platform_cpu_init() 84{ 85 /* Nothing special */ 86} 87 88static void 89mips_init(void) 90{ 91 int i, j; 92 93 printf("entry: mips_init()\n"); 94 95#ifdef CFE 96 /* 97 * Query DRAM memory map from CFE. 98 */ 99 physmem = 0; 100 for (i = 0; i < 10; i += 2) { 101 int result; 102 uint64_t addr, len, type; 103 104 result = cfe_enummem(i, 0, &addr, &len, &type); 105 if (result < 0) { 106 phys_avail[i] = phys_avail[i + 1] = 0; 107 break; 108 } 109 if (type != CFE_MI_AVAILABLE) 110 continue; 111 112 phys_avail[i] = addr; 113 if (i == 0 && addr == 0) { 114 /* 115 * If this is the first physical memory segment probed 116 * from CFE, omit the region at the start of physical 117 * memory where the kernel has been loaded. 118 */ 119 phys_avail[i] += MIPS_KSEG0_TO_PHYS(kernel_kseg0_end); 120 } 121 phys_avail[i + 1] = addr + len; 122 physmem += len; 123 } 124 125 realmem = btoc(physmem); 126#endif 127 128 for (j = 0; j < i; j++) 129 dump_avail[j] = phys_avail[j]; 130 131 physmem = realmem; 132 133 init_param1(); 134 init_param2(physmem); 135 mips_cpu_init(); 136 pmap_bootstrap(); 137 mips_proc0_init(); 138 mutex_init(); 139 kdb_init(); 140#ifdef KDB 141 if (boothowto & RB_KDB) 142 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger"); 143#endif 144} 145 146void 147platform_reset(void) 148{ 149 150#if defined(CFE) 151 cfe_exit(0, 0); 152#else 153 *((volatile uint8_t *)MIPS_PHYS_TO_KSEG1(SENTRY5_EXTIFADR)) = 0x80; 154#endif 155} 156 157void 158platform_start(__register_t a0, __register_t a1, __register_t a2, 159 __register_t a3) 160{ 161 vm_offset_t kernend; 162 uint64_t platform_counter_freq; 163 164 /* clear the BSS and SBSS segments */ 165 kernend = (vm_offset_t)&end; 166 memset(&edata, 0, kernend - (vm_offset_t)(&edata)); 167 168 mips_postboot_fixup(); 169 170 /* Initialize pcpu stuff */ 171 mips_pcpu0_init(); 172 173#ifdef CFE 174 /* 175 * Initialize CFE firmware trampolines before 176 * we initialize the low-level console. 177 * 178 * CFE passes the following values in registers: 179 * a0: firmware handle 180 * a2: firmware entry point 181 * a3: entry point seal 182 */ 183 if (a3 == CFE_EPTSEAL) 184 cfe_init(a0, a2); 185#endif 186 cninit(); 187 188 mips_init(); 189 190# if 0 191 /* 192 * Probe the Broadcom Sentry5's on-chip PLL clock registers 193 * and discover the CPU pipeline clock and bus clock 194 * multipliers from this. 195 * XXX: Wrong place. You have to ask the ChipCommon 196 * or External Interface cores on the SiBa. 197 */ 198 uint32_t busmult, cpumult, refclock, clkcfg1; 199#define S5_CLKCFG1_REFCLOCK_MASK 0x0000001F 200#define S5_CLKCFG1_BUSMULT_MASK 0x000003E0 201#define S5_CLKCFG1_BUSMULT_SHIFT 5 202#define S5_CLKCFG1_CPUMULT_MASK 0xFFFFFC00 203#define S5_CLKCFG1_CPUMULT_SHIFT 10 204 205 counter_freq = 100000000; /* XXX */ 206 207 clkcfg1 = s5_rd_clkcfg1(); 208 printf("clkcfg1 = 0x%08x\n", clkcfg1); 209 210 refclock = clkcfg1 & 0x1F; 211 busmult = ((clkcfg1 & 0x000003E0) >> 5) + 1; 212 cpumult = ((clkcfg1 & 0xFFFFFC00) >> 10) + 1; 213 214 printf("refclock = %u\n", refclock); 215 printf("busmult = %u\n", busmult); 216 printf("cpumult = %u\n", cpumult); 217 218 counter_freq = cpumult * refclock; 219# else 220 platform_counter_freq = 200 * 1000 * 1000; /* Sentry5 is 200MHz */ 221# endif 222 223 mips_timer_init_params(platform_counter_freq, 0); 224} 225