/* $OpenBSD: Locore.c,v 1.18 2022/10/21 21:26:49 gkoehler Exp $ */ /* $NetBSD: Locore.c,v 1.1 1997/04/16 20:29:11 thorpej Exp $ */ /* * Copyright (C) 1995, 1996 Wolfgang Solfrank. * Copyright (C) 1995, 1996 TooLs GmbH. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by TooLs GmbH. * 4. The name of TooLs GmbH may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include "libsa.h" int main(void); #define ENABLE_DECREMENTER_WORKAROUND void bat_init(void); void patch_dec_intr(void); __dead void exit(void); static int (*openfirmware)(void *); static void setup(void); asm (".text; .globl _entry; _entry: .long _start,0,0"); asm(" .text \n" " .globl bat_init \n" "bat_init: \n" " \n" " mfmsr 8 \n" " li 0,0 \n" " mtmsr 0 \n" " isync \n" " \n" " mtibatu 0,0 \n" " mtibatu 1,0 \n" " mtibatu 2,0 \n" " mtibatu 3,0 \n" " mtdbatu 0,0 \n" " mtdbatu 1,0 \n" " mtdbatu 2,0 \n" " mtdbatu 3,0 \n" " \n" " li 9,0x12 \n" /* BATL(0, BAT_M, BAT_PP_RW) */ " mtibatl 0,9 \n" " mtdbatl 0,9 \n" " li 9,0x1ffe \n" /* BATU(0, BAT_BL_256M, BAT_Vs) */ " mtibatu 0,9 \n" " mtdbatu 0,9 \n" " isync \n" " \n" " mtmsr 8 \n" " isync \n" " blr \n"); #ifdef XCOFF_GLUE static int stack[8192/4 + 4] __attribute__((__used__)); #endif __dead void _start(void *vpd, int res, int (*openfirm)(void *), char *arg, int argl) { extern char etext[]; #ifdef XCOFF_GLUE asm( "sync \n" "isync \n" "lis %r1,stack@ha \n" "addi %r1,%r1,stack@l \n" "addi %r1,%r1,8192 \n"); #endif syncicache((void *)RELOC, etext - (char *)RELOC); bat_init(); openfirmware = openfirm; /* Save entry to Open Firmware */ #ifdef ENABLE_DECREMENTER_WORKAROUND patch_dec_intr(); #endif setup(); main(); exit(); } #ifdef ENABLE_DECREMENTER_WORKAROUND void handle_decr_intr(); __asm ( " .globl handle_decr_intr\n" "handle_decr_intr:\n" " rfi\n"); void patch_dec_intr() { int time; unsigned int *decr_intr = (unsigned int *)0x900; unsigned int br_instr; /* this hack is to prevent unexpected Decrementer Exceptions * when Apple openfirmware enables interrupts */ time = 0x40000000; asm("mtdec %0" :: "r"(time)); /* we assume that handle_decr_intr is in the first 128 Meg */ br_instr = (18 << 23) | (unsigned int)handle_decr_intr; *decr_intr = br_instr; } #endif __dead void _rtt() { static struct { char *name; int nargs; int nreturns; } args = { "exit", 0, 0 }; openfirmware(&args); while (1); /* just in case */ } int OF_finddevice(char *name) { static struct { char *name; int nargs; int nreturns; char *device; int phandle; } args = { "finddevice", 1, 1, }; args.device = name; if (openfirmware(&args) == -1) return -1; return args.phandle; } int OF_instance_to_package(int ihandle) { static struct { char *name; int nargs; int nreturns; int ihandle; int phandle; } args = { "instance-to-package", 1, 1, }; args.ihandle = ihandle; if (openfirmware(&args) == -1) return -1; return args.phandle; } int OF_getprop(int handle, char *prop, void *buf, int buflen) { static struct { char *name; int nargs; int nreturns; int phandle; char *prop; void *buf; int buflen; int size; } args = { "getprop", 4, 1, }; args.phandle = handle; args.prop = prop; args.buf = buf; args.buflen = buflen; if (openfirmware(&args) == -1) return -1; return args.size; } int OF_open(char *dname) { static struct { char *name; int nargs; int nreturns; char *dname; int handle; } args = { "open", 1, 1, }; args.dname = dname; if (openfirmware(&args) == -1) return -1; return args.handle; } void OF_close(int handle) { static struct { char *name; int nargs; int nreturns; int handle; } args = { "close", 1, 0, }; args.handle = handle; openfirmware(&args); } int OF_write(int handle, void *addr, int len) { static struct { char *name; int nargs; int nreturns; int ihandle; void *addr; int len; int actual; } args = { "write", 3, 1, }; args.ihandle = handle; args.addr = addr; args.len = len; if (openfirmware(&args) == -1) return -1; return args.actual; } int OF_read(int handle, void *addr, int len) { static struct { char *name; int nargs; int nreturns; int ihandle; void *addr; int len; int actual; } args = { "read", 3, 1, }; args.ihandle = handle; args.addr = addr; args.len = len; if (openfirmware(&args) == -1) return -1; return args.actual; } int OF_seek(int handle, u_quad_t pos) { static struct { char *name; int nargs; int nreturns; int handle; int poshi; int poslo; int status; } args = { "seek", 3, 1, }; args.handle = handle; args.poshi = (int)(pos >> 32); args.poslo = (int)pos; if (openfirmware(&args) == -1) return -1; return args.status; } void * OF_claim(void *virt, u_int size, u_int align) { static struct { char *name; int nargs; int nreturns; void *virt; u_int size; u_int align; void *baseaddr; } args = { "claim", 3, 1, }; args.virt = virt; args.size = size; args.align = align; if (openfirmware(&args) == -1) return (void *)-1; if (virt != 0) return virt; return args.baseaddr; } void OF_release(void *virt, u_int size) { static struct { char *name; int nargs; int nreturns; void *virt; u_int size; } args = { "release", 2, 0, }; args.virt = virt; args.size = size; openfirmware(&args); } int OF_milliseconds() { static struct { char *name; int nargs; int nreturns; int ms; } args = { "milliseconds", 0, 1, }; openfirmware(&args); return args.ms; } #ifdef __notyet__ void OF_chain(void *virt, u_int size, void (*entry)(), void *arg, u_int len) { static struct { char *name; int nargs; int nreturns; void *virt; u_int size; void (*entry)(); void *arg; u_int len; } args = { "chain", 5, 0, }; args.virt = virt; args.size = size; args.entry = entry; args.arg = arg; args.len = len; openfirmware(&args); } #else void OF_chain(void *virt, u_int size, void (*entry)(), void *arg, u_int len) { /* * This is a REALLY dirty hack till the firmware gets this going OF_release(virt, size); */ entry(0, 0, openfirmware, arg, len); } #endif int OF_call_method(char *method, int ihandle, int nargs, int nreturns, ...) { va_list ap; static struct { char *name; int nargs; int nreturns; char *method; int ihandle; int args_n_results[12]; } args = { "call-method", 2, 1, }; int *ip, n; if (nargs > 6) return -1; args.nargs = nargs + 2; args.nreturns = nreturns + 1; args.method = method; args.ihandle = ihandle; va_start(ap, nreturns); for (ip = args.args_n_results + (n = nargs); --n >= 0;) *--ip = va_arg(ap, int); if (openfirmware(&args) == -1) { va_end(ap); return -1; } if (args.args_n_results[nargs]) { va_end(ap); return args.args_n_results[nargs]; } for (ip = args.args_n_results + nargs + (n = args.nreturns); --n > 0;) *va_arg(ap, int *) = *--ip; va_end(ap); return 0; } static int stdin; static int stdout; static void setup() { int chosen; if ((chosen = OF_finddevice("/chosen")) == -1) _rtt(); if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) != sizeof(stdin) || OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) != sizeof(stdout)) _rtt(); if (stdout == 0) { /* screen should be console, but it is not open */ stdout = OF_open("screen"); } } void putchar(int c) { char ch = c; if (c == '\177') { ch = '\b'; OF_write(stdout, &ch, 1); ch = ' '; OF_write(stdout, &ch, 1); ch = '\b'; } if (c == '\n') putchar('\r'); OF_write(stdout, &ch, 1); } void ofc_probe(struct consdev *cn) { cn->cn_pri = CN_LOWPRI; cn->cn_dev = makedev(0,0); /* WTF */ } void ofc_init(struct consdev *cn) { } char buffered_char; int ofc_getc(dev_t dev) { u_int8_t ch; int l; if (dev & 0x80) { if (buffered_char != 0) return 1; l = OF_read(stdin, &ch, 1); if (l == 1) { buffered_char = ch; return 1; } return 0; } if (buffered_char != 0) { ch = buffered_char; buffered_char = 0; return ch; } while ((l = OF_read(stdin, &ch, 1)) != 1) if (l != -2 && l != 0) return 0; return ch; } void ofc_putc(dev_t dev, int c) { char ch; ch = 'a'; OF_write(stdout, &ch, 1); ch = c; if (c == '\177' && c == '\b') { ch = 'A'; } OF_write(stdout, &ch, 1); } void machdep() { cninit(); }