1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* 23 * Copyright (c) 1986-1997, Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27#pragma ident "%Z%%M% %I% %E% SMI" 28 29/* 30 * standalone startup code for sun4u LP64 secondary booters. 31 */ 32 33#include <sys/asm_linkage.h> 34#include <sys/privregs.h> 35#include <sys/stack.h> 36 37#if defined(lint) 38 39/*ARGSUSED*/ 40void 41_start(void *a, ...) 42{} 43 44#else 45 .seg ".text" 46 .align 8 47 .global end 48 .global edata 49 .global main 50 51 .seg ".bss" 52 .align 8 53 54_local_p1275cif: 55 .skip 8 56 57! 58! Create a stack just below _start. 59! 60#define STACK_SIZE 0x14000 61 62 .skip STACK_SIZE 63.ebootstack: ! end --top-- of boot stack 64 65! 66! Enter here for all disk/secondary booters loaded by a bootblk program or 67! inetboot loaded by OBP. 68! Careful: don't touch %o4 until the save, since it contains the 69! address of the IEEE 1275 SPARC v9 CIF handler; the linkage to the prom. 70! 71 .seg ".text" 72 .global prom_exit_to_mon 73 .type prom_exit_to_mon, #function 74 75 ENTRY(_start) 76 77 ! 78 ! The stacks in bss now; use the stack we came in on (prom is supposed 79 ! to call us with a minimum of an 8k stack, bzero bss (and thus our 80 ! new stack), then switch to the new stack. Do all this without losing 81 ! track of the p1275cif address cached in %o4. 82 ! 83 84 save %sp, -SA(MINFRAME), %sp 85 86 ! 87 ! Zero the bss [edata to end] 88 ! 89 setn edata, %g1, %o0 90 setn end, %g1, %i2 91 call bzero 92 sub %i2, %o0, %o1 ! size 93 94 restore %g0, %g0, %g0 ! Trivial restore 95 96 ! 97 ! Switch to our new stack. 98 ! 99 setn (.ebootstack - STACK_BIAS), %g1, %o1 100 save %o1, -SA(MINFRAME), %sp 101 102 ! 103 ! Set supervisor mode, interrupt level >= 13, traps enabled 104 ! We don't set PSTATE_AM even though all our addresses are under 4G. 105 ! 106 wrpr %g0, PSTATE_PEF+PSTATE_PRIV+PSTATE_IE, %pstate 107 108 sethi %hi(_local_p1275cif), %o1 109 stx %i4, [%o1 + %lo(_local_p1275cif)] 110 call main ! main(prom-cookie) 111 mov %i4, %o0 ! SPARCV9/CIF 112 113 ! print stupid error message here! 114 115 call prom_enter_mon ! can't happen .. :-) 116 nop 117 SET_SIZE(_start) 118 119#endif /* lint */ 120 121#if defined(lint) 122 123/* ARGSUSED */ 124void 125exitto(int (*entrypoint)(void *romvec, void *dvec, void *bootops, 126 void *bootvec)) 127{} 128 129/* ARGSUSED */ 130void 131exitto64(int (*entrypoint)(void *romvec, void *dvec, void *bootops, 132 void *bootvec), void *bootvec) 133{} 134 135#else /* lint */ 136 137 ENTRY(exitto) 138 ! 139 ! Setup args for client. 140 ! 141 ! 32 bit frame, 64 bit sized 142 sub %g0, SA(MINFRAME) - STACK_BIAS, %g1 143 save %sp, %g1, %sp 144 sethi %hi(_local_p1275cif), %o0 ! 1275 CIF handler for callee. 145 ldx [%o0 + %lo(_local_p1275cif)], %o0 146 clr %o1 ! boot passes no dvec 147 setn bootops, %g1, %o2 148 sethi %hi(elfbootvec), %o3 ! pass elf bootstrap vector 149 ldx [%o3 + %lo(elfbootvec)], %o3 150 rdpr %pstate, %l1 ! Get the present pstate value 151 wrpr %l1, PSTATE_AM, %pstate ! Set PSTATE_AM = 1 152 jmpl %i0, %o7 ! call thru register to the standalone 153 mov %o0, %o4 ! 1210378: Pass cif in both %o0 & %o4 154 155 ! eek - we returned -- switch back to a 64-bit frame 156 ! then panic in a slightly informative way. 157 158 restore %g0, %g0, %g0 159 save %sp, -SA(MINFRAME), %sp 160 sethi %hi(.msg), %o0 161 call prom_panic 162 or %o0, %lo(.msg), %o0 163.msg: .asciz "exitto returned from client program" 164 SET_SIZE(exitto) 165 166 ENTRY(exitto64) 167 ! 168 ! Setup args for client. 169 ! 170 save %sp, -SA(MINFRAME), %sp 171 sethi %hi(_local_p1275cif), %o0 ! 1275 CIF handler for callee. 172 ldx [%o0 + %lo(_local_p1275cif)], %o0 173 mov %i1, %o3 ! bootvec 174 clr %o1 ! boot passes no dvec 175 setn bootops, %g1, %o2 176 jmpl %i0, %o7 ! call thru register to the standalone 177 mov %o0, %o4 ! 1210378: Pass cif in both %o0 & %o4 178 179 ! eek - we returned -- panic in a slightly informative way. 180 181 sethi %hi(.msg64), %o0 182 call prom_panic 183 or %o0, %lo(.msg64), %o0 184.msg64: .asciz "exitto64 returned from client program" 185 SET_SIZE(exitto64) 186 187#endif /* lint */ 188 189#if defined(lint) 190 191/* 192 * The interface for our 64-bit client program 193 * calling the 64-bit romvec OBP. 194 */ 195 196#include <sys/promif.h> 197#include <sys/prom_isa.h> 198 199/* ARGSUSED */ 200int 201client_handler(void *cif_handler, void *arg_array) 202{ return (0); } 203 204#else /* lint */ 205 206 ENTRY(client_handler) 207 mov %o7, %g1 208 mov %o0, %g5 209 mov %o1, %o0 210 jmp %g5 211 mov %g1, %o7 212 SET_SIZE(client_handler) 213 214#endif /* lint */ 215