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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 | /* * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1999 by Helge Deller * Copyright 1999 SuSE GmbH (Philipp Rumpf) * Copyright 1999 Philipp Rumpf (prumpf@tux.org) * Copyright 2000 Hewlett Packard (Paul Bame, bame@puffin.external.hp.com) * Copyright (C) 2001 Grant Grundler (Hewlett Packard) * * Initial Version 04-23-1999 by Helge Deller <deller@gmx.de> */ #include <linux/autoconf.h> /* for CONFIG_SMP */ #include <asm/offsets.h> #include <asm/psw.h> #include <asm/assembly.h> #include <asm/pgtable.h> #include <asm/pdc.h> /* for PDC_PSW defines */ .level 2.0w .section .initcall.init .align 4 .export __initcall_start __initcall_start: .export __initcall_end __initcall_end: .export __setup_start __setup_start: .export __setup_end __setup_end: .data .export boot_args boot_args: .word 0 /* arg0 */ .word 0 /* arg1 */ .word 0 /* arg2 */ .word 0 /* arg3 */ .text .align 4 .export stext .export _stext,data /* Kernel want it this way! */ _stext: stext: .proc .callinfo /* Make sure sr4-sr7 are set to zero for the kernel address space */ mtsp %r0,%sr4 mtsp %r0,%sr5 mtsp %r0,%sr6 mtsp %r0,%sr7 /* Clear BSS (shouldn't the boot loader do this?) */ .import _edata,data .import _end,data ldil L%PA(_edata),%r3 ldo R%PA(_edata)(%r3),%r3 ldil L%PA(_end),%r4 ldo R%PA(_end)(%r4),%r4 $bss_loop: cmpb,<<,n %r3,%r4,$bss_loop stb,ma %r0,1(%r3) /* Save away the arguments the boot loader passed in (32 bit args) */ ldil L%PA(boot_args),%r1 ldo R%PA(boot_args)(%r1),%r1 stw,ma %arg0,4(%r1) stw,ma %arg1,4(%r1) stw,ma %arg2,4(%r1) stw,ma %arg3,4(%r1) /* Initialize startup VM. Just map first 8 MB of memory */ ldil L%PA(pg0),%r1 ldo R%PA(pg0)(%r1),%r1 ldil L%PA(pmd0),%r5 ldo R%PA(pmd0)(%r5),%r5 ldo _PAGE_TABLE(%r5),%r3 ldil L%PA(swapper_pg_dir),%r4 ldo R%PA(swapper_pg_dir)(%r4),%r4 mtctl %r4,%cr24 /* Initialize kernel root pointer */ mtctl %r4,%cr25 /* Initialize user root pointer */ #if (__PAGE_OFFSET != 0x10000000UL) Error! Code below (the next five std's) needs to be changed #endif std %r3,0x00(%r4) /* Hardwired 0x1... kernel Vaddr start*/ ldo _PAGE_TABLE(%r1),%r3 std %r3,0x400(%r5) /* Hardwired 0x1... kernel Vaddr start*/ ldo 0x1000(%r3),%r3 std %r3,0x408(%r5) ldo 0x1000(%r3),%r3 std %r3,0x410(%r5) ldo 0x1000(%r3),%r3 std %r3,0x418(%r5) ldo _PAGE_KERNEL(%r0),%r3 /* Hardwired 0 phys addr start */ $pgt_fill_loop: std,ma %r3,8(%r1) ldo 0x1000(%r3),%r3 bb,>= %r3,8,$pgt_fill_loop nop /* And the RFI Target address too */ load32 start_kernel, %r11 /* And the stack pointer too */ load32 PA(init_thread_union+THREAD_SZ_ALGN),%sp /* And the initial task pointer */ load32 init_thread_union,%r6 mtctl %r6,%cr30 /* And the interrupt stack */ load32 interrupt_stack,%r6 mtctl %r6,%cr31 /* Act like PDC just called us - that's how slave CPUs enter */ #define MEM_PDC_LO 0x388 #define MEM_PDC_HI 0x35C ldw MEM_PDC_LO(%r0),%r3 ldw MEM_PDC_HI(%r0),%r6 depd %r6, 31, 32, %r3 /* move to upper word */ #ifdef CONFIG_SMP /* Set the smp rendevous address into page zero. ** It would be safer to do this in init_smp_config() but ** it's just way easier to deal with here because ** of 64-bit function ptrs and the address is local to this file. */ ldil L%PA(smp_slave_stext),%r10 ldo R%PA(smp_slave_stext)(%r10),%r10 stw %r10,0x10(%r0) /* MEM_RENDEZ */ stw %r0,0x28(%r0) /* MEM_RENDEZ_HI - assume addr < 4GB */ /* FALLTHROUGH */ .procend /* ** Code Common to both Monarch and Slave processors. ** Entry: ** %r3 PDCE_PROC address ** %r11 RFI target address. ** ** Caller must init: SR4-7, %sp, %r10, %cr24/25, */ common_stext: .proc .callinfo #else /* CONFIG_SMP */ /* Clear PDC's CPU handoff address - we won't use it */ stw %r0,0x10(%r0) /* MEM_RENDEZ */ stw %r0,0x28(%r0) /* MEM_RENDEZ_HI */ #endif /* CONFIG_SMP */ /* Save the rfi target address */ std %r11, TASK_PT_GR11-TASK_SZ_ALGN(%sp) #ifndef CONFIG_PDC_NARROW /* Switch to wide mode; Superdome doesn't support narrow PDC ** calls. */ 1: mfia %rp /* clear upper part of pcoq */ ldo 2f-1b(%rp),%rp depdi 0,31,32,%rp bv (%rp) ssm PSW_SM_W,%r0 2: #endif /* CONFIG_PDC_NARROW */ /* Set Wide mode as the "Default" (eg for traps) ** First trap occurs *right* after (or part of) rfi for slave CPUs. ** Someday, palo might not do this for the Monarch either. */ ldo PDC_PSW(%r0),%arg0 /* 21 */ ldo PDC_PSW_SET_DEFAULTS(%r0),%arg1 /* 2 */ ldo PDC_PSW_WIDE_BIT(%r0),%arg2 /* 2 */ load32 PA(stext_pdc_ret), %rp bv (%r3) copy %r0,%arg3 stext_pdc_ret: /* restore rfi target address*/ ldd TASK_PT_GR11-TASK_SZ_ALGN(%sp), %r11 /* PARANOID: clear user scratch/user space SR's */ mtsp %r0,%sr0 mtsp %r0,%sr1 mtsp %r0,%sr2 mtsp %r0,%sr3 /* Initialize Protection Registers */ mtctl %r0,%cr8 mtctl %r0,%cr9 mtctl %r0,%cr12 mtctl %r0,%cr13 /* Prepare to RFI! Man all the cannons! */ tovirt_r1 %sp /* Initialize the global data pointer */ load32 __gp,%dp /* Set up our interrupt table. HPMCs might not work after this! */ ldil L%PA(fault_vector_20),%r10 ldo R%PA(fault_vector_20)(%r10),%r10 mtctl %r10,%cr14 b aligned_rfi nop /* the magic spell */ .align 256 aligned_rfi: ssm 0,0 nop /* 1 */ nop /* 2 */ nop /* 3 */ nop /* 4 */ nop /* 5 */ nop /* 6 */ nop /* 7 */ nop /* 8 */ /* turn off troublesome PSW bits */ rsm PSW_Q+PSW_I+PSW_D+PSW_P+PSW_R, %r0 /* kernel PSW: * - no interruptions except HPMC and TOC (which are handled by PDC) * - Q bit set (IODC / PDC interruptions) * - big-endian * - virtually mapped */ load32 KERNEL_PSW,%r10 mtctl %r10,%ipsw /* Set the space pointers for the post-RFI world ** Clear the two-level IIA Space Queue, effectively setting ** Kernel space. */ mtctl %r0,%cr17 mtctl %r0,%cr17 /* Load RFI target into PC queue */ mtctl %r11,%cr18 ldo 4(%r11),%r11 mtctl %r11,%cr18 /* Jump to hyperspace */ rfi nop .procend #ifdef CONFIG_SMP .import smp_init_current_idle_task,data .import smp_callin,code /*************************************************************************** * * smp_slave_stext is executed by all non-monarch Processors when the Monarch * pokes the slave CPUs in smp.c:smp_boot_cpus(). * * Once here, registers values are initialized in order to branch to virtual * mode. Once all available/eligible CPUs are in virtual mode, all are * released and start out by executing their own idle task. *****************************************************************************/ smp_slave_stext: .proc .callinfo /* ** Initialize Space registers */ mtsp %r0,%sr4 mtsp %r0,%sr5 mtsp %r0,%sr6 mtsp %r0,%sr7 /* Initialize the SP - monarch sets up smp_init_current_idle_task */ load32 PA(smp_init_current_idle_task),%sp ldd 0(%sp),%sp /* load task address */ mtctl %sp,%cr30 /* store in cr30 */ ldo TASK_SZ_ALGN(%sp),%sp tophys_r1 %sp /* point CPU to kernel page tables */ load32 PA(swapper_pg_dir),%r4 mtctl %r4,%cr24 /* Initialize kernel root pointer */ mtctl %r4,%cr25 /* Initialize user root pointer */ /* Setup PDCE_PROC entry */ copy %arg0,%r3 /* Load RFI target address. */ load32 smp_callin, %r11 /* ok...common code can handle the rest */ b common_stext nop .procend #endif /* CONFIG_SMP */ |