--- /dev/null
+/*
+ * Creation Date: <2002/10/02 22:24:24 samuel>
+ * Time-stamp: <2004/03/27 01:57:55 samuel>
+ *
+ * <main.c>
+ *
+ *
+ *
+ * Copyright (C) 2002, 2003, 2004 Samuel Rydh (samuel@ibrium.se)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation
+ *
+ */
+
+
+#include "config.h"
+#include "libopenbios/bindings.h"
+#include "libopenbios/elfload.h"
+#include "arch/common/nvram.h"
+#include "libc/diskio.h"
+#include "libc/vsprintf.h"
+#include "mol/mol.h"
+#include "libopenbios/ofmem.h"
+#include "osi_calls.h"
+#include "ablk_sh.h"
+#include "boothelper_sh.h"
+
+
+static void patch_newworld_rom( char *start, size_t size );
+static void newworld_timer_hack( char *start, size_t size );
+
+static void
+transfer_control_to_elf( unsigned long entry )
+{
+ extern void call_elf( unsigned long entry );
+ printk("Starting ELF boot loader\n");
+ call_elf( entry );
+
+ fatal_error("call_elf returned unexpectedly\n");
+}
+
+static int
+load_elf_rom( unsigned long *entry, int fd )
+{
+ int i, lszz_offs, elf_offs;
+ char buf[128], *addr;
+ Elf_ehdr ehdr;
+ Elf_phdr *phdr;
+ size_t s;
+
+ printk("Loading '%s' from '%s'\n", get_file_path(fd),
+ get_volume_name(fd) );
+
+ /* the ELF-image (usually) starts at offset 0x4000 */
+ if( (elf_offs=find_elf(fd)) < 0 ) {
+ printk("----> %s is not an ELF image\n", buf );
+ exit(1);
+ }
+ if( !(phdr=elf_readhdrs(fd, elf_offs, &ehdr)) )
+ fatal_error("elf_readhdrs failed\n");
+
+ *entry = ehdr.e_entry;
+
+ /* load segments. Compressed ROM-image assumed to be located immediately
+ * after the last segment */
+ lszz_offs = elf_offs;
+ for( i=0; i<ehdr.e_phnum; i++ ) {
+ /* p_memsz, p_flags */
+ s = MIN( phdr[i].p_filesz, phdr[i].p_memsz );
+ seek_io( fd, elf_offs + phdr[i].p_offset );
+
+ /* printk("filesz: %08lX memsz: %08lX p_offset: %08lX p_vaddr %08lX\n",
+ phdr[i].p_filesz, phdr[i].p_memsz, phdr[i].p_offset,
+ phdr[i].p_vaddr ); */
+
+ if( phdr[i].p_vaddr != phdr[i].p_paddr )
+ printk("WARNING: ELF segment virtual addr != physical addr\n");
+ lszz_offs = MAX( lszz_offs, elf_offs + phdr[i].p_offset + phdr[i].p_filesz );
+ if( !s )
+ continue;
+ if( ofmem_claim( phdr[i].p_vaddr, phdr[i].p_memsz, 0 ) == -1 )
+ fatal_error("Claim failed!\n");
+
+ addr = (char*)phdr[i].p_vaddr;
+ if( read_io(fd, addr, s) != s )
+ fatal_error("read failed\n");
+
+ /* patch CODE segment */
+ if( *entry >= phdr[i].p_vaddr && *entry < phdr[i].p_vaddr + s ) {
+ patch_newworld_rom( (char*)phdr[i].p_vaddr, s );
+ newworld_timer_hack( (char*)phdr[i].p_vaddr, s );
+ }
+ flush_icache_range( addr, addr+s );
+
+ /* printk("ELF ROM-section loaded at %08lX (size %08lX)\n",
+ (unsigned long)phdr[i].p_vaddr, (unsigned long)phdr[i].p_memsz );*/
+ }
+ free( phdr );
+ return lszz_offs;
+}
+
+
+/************************************************************************/
+/* newworld ROM loading */
+/************************************************************************/
+
+#define ROM_BASE 0x1100000 /* where we decide to put things */
+
+/* fix bug present in the 2.4 and the 3.0 Apple ROM */
+static void
+patch_newworld_rom( char *start, size_t size )
+{
+ int s;
+ unsigned long mark[] = { 0x7c7d1b78, /* mr r29,r3 */
+ 0x7c9c2378, /* mr r28,r4 */
+ 0x7cc33378, /* mr r3,r6 */
+ 0x7c864214, /* add r4,r6,r8 <------ BUG -- */
+ 0x80b10000, /* lwz r5,0(r17) */
+ 0x38a500e8 }; /* addi r5,r5,232 */
+
+ /* Correcting add r4,r6,r8 ----> addi r4,r6,8 */
+ for( s=0; s<size-sizeof(mark); s+=4 )
+ if( memcmp( start+s, mark, sizeof(mark)) == 0 ) {
+ printk("FIXING ROM BUG @ %X!\n", s+12);
+ ((unsigned long*)(start+s))[3] = 0x38860008; /* addi r4,r6,8 */
+ }
+}
+
+/* This hack is only needed on machines with a timebase slower than 12.5 MHz
+ * (50 MHz bus frequency). Typically only old, accelerated machines fall
+ * into this category. The cause of the problem is an overflow in Apple's
+ * calibration routine.
+ */
+static void
+newworld_timer_hack( char *start, size_t size )
+{
+ int s;
+ unsigned long mark[] = { 0x7d0000a6, 0x5507045e, 0x7ce00124, 0x4c00012c,
+ 0x38e00000, 0x3c80000f, 0x6084ffff, 0x98830c00,
+ 0x7c0006ac, 0x98830a00, 0x7c0006ac, 0x7c9603a6,
+ 0x4c00012c, 0x7cb602a6, 0x2c050000, 0x4181fff8,
+ 0x7c0004ac, 0x88830a00, 0x7c0006ac, 0x88a30800,
+ 0x7c0006ac, 0x88c30a00, 0x7c0006ac, 0x7c043040,
+ 0x40a2ffe4, 0x5085442e, 0x7ca500d0, 0x54a5043e,
+ 0x7c053840, 0x7ca72b78, 0x4082ff9c, 0x7ca32b78,
+ 0x7d000124, 0x4c00012c, 0x4e800020
+ };
+
+ /* return #via ticks corresponding to 0xfffff DEC ticks (VIA frequency == 47/60 MHz) */
+ for( s=0; s < size-sizeof(mark); s+=4 ) {
+ if( !memcmp( start+s, mark, sizeof(mark)) ) {
+ extern char timer_calib_start[], timer_calib_end[];
+ extern unsigned long nw_dec_calibration;
+ int hz = OSI_UsecsToMticks(1000);
+ nw_dec_calibration = OSI_MticksToUsecs(0xfffff*47)/60;
+ memcpy( start + s, timer_calib_start, timer_calib_end - timer_calib_start );
+
+ printk("Timer calibration fix: %d.%02d MHz [%ld]\n",
+ hz/1000, (hz/10)%100, nw_dec_calibration );
+ break;
+ }
+ }
+}
+
+static unsigned long
+load_newworld_rom( int fd )
+{
+ int lszz_offs, lszz_size;
+ unsigned long entry, data[2];
+ phandle_t ph;
+
+ lszz_offs = load_elf_rom( &entry, fd );
+ seek_io( fd, -1 );
+ lszz_size = tell(fd) - lszz_offs;
+ seek_io( fd, lszz_offs );
+
+ /* printk("Compressed ROM image: offset %08X, size %08X loaded at %08x\n",
+ lszz_offs, lszz_size, ROM_BASE ); */
+
+ if( ofmem_claim(ROM_BASE, lszz_size, 0) == -1 )
+ fatal_error("Claim failure (lszz)!\n");
+
+ read_io( fd, (char*)ROM_BASE, lszz_size );
+
+ /* Fix the /rom/macos/AAPL,toolbox-image,lzss property (phys, size) */
+#if 0
+ if( (ph=prom_create_node("/rom/macos/")) == -1 )
+ fatal_error("Failed creating /rom/macos/");
+#else
+ ph = find_dev("/rom/macos");
+#endif
+ data[0] = ROM_BASE;
+ data[1] = lszz_size;
+ set_property( ph, "AAPL,toolbox-image,lzss", (char*)data, sizeof(data) );
+
+ /* The 7.8 rom (MacOS 9.2) uses AAPL,toolbox-parcels instead of
+ * AAPL,toolbox-image,lzss. It probably doesn't hurt to have it
+ * always present (we don't have an easy way to determine ROM version...)
+ */
+ set_property( ph, "AAPL,toolbox-parcels", (char*)data, sizeof(data) );
+ return entry;
+}
+
+static int
+search_nwrom( int fd, int fast )
+{
+ char *s, buf[128];
+ int found = 0;
+
+ if( fast ) {
+ int ind;
+ found = !reopen( fd, "\\\\:tbxi" );
+ for( ind=0; !found && (s=BootHGetStrResInd("macos_rompath", buf, sizeof(buf), ind++, 0)) ; )
+ found = !reopen( fd, s );
+ for( ind=0; !found && (s=BootHGetStrResInd("macos_rompath_", buf, sizeof(buf), ind++, 0)) ; )
+ found = !reopen( fd, s );
+ } else {
+ printk("Searching %s for a 'Mac OS ROM' file\n", get_volume_name(fd) );
+ if( !(found=reopen_nwrom(fd)) ) {
+ printk(" \n**** HINT ***************************************************\n");
+ printk("* The booting can be speeded up by adding the line\n");
+ printk("* macos_rompath: '%s'\n", get_file_path(fd) );
+ printk("* to the /etc/mol/molrc.macos (recommended).\n");
+ printk("*************************************************************\n \n");
+ }
+ }
+ return found;
+}
+
+static void
+encode_bootpath( const char *spec, const char *args )
+{
+ phandle_t chosen_ph = find_dev("/chosen");
+ set_property( chosen_ph, "bootpath", spec, strlen(spec)+1 );
+ set_property( chosen_ph, "bootargs", args, strlen(args)+1 );
+}
+
+static char *
+newworld_load( const char *node_path, const char *spec, int do_search )
+{
+ char *p, *entry, buf[80];
+ int fd, len;
+
+ if( (fd=open_io(spec)) == -1 )
+ return NULL;
+
+ if( !search_nwrom(fd, do_search) ) {
+ close_io(fd);
+ return NULL;
+ }
+ printk("Boot Disk: %s [%s]\n", spec, get_fstype(fd) );
+
+ entry = (char*)load_newworld_rom( fd );
+
+#if 1
+ PUSH_ih( get_ih_from_fd(fd) );
+ fword("get-instance-path");
+ len = POP();
+ p = (char*)POP();
+ buf[0] = 0;
+ if( len < sizeof(buf) ) {
+ memcpy( buf, p, len );
+ buf[len] =0;
+ }
+ strcat( buf, "/x@:" );
+ printk("boot_path: %s\n", buf );
+ encode_bootpath( buf, "" );
+#endif
+ close_io( fd );
+ return entry;
+}
+
+static void
+newworld_startup( void )
+{
+ int i, j, bootunit, type, fd;
+ ablk_disk_info_t info;
+ char *entry = NULL;
+ char spec[80];
+ phandle_t ph;
+
+ char path[]="/pci/pci-bridge/mol-blk";
+ if( !(ph=find_dev(path)) )
+ fatal_error("MOLBlockDriver node not found\n");
+
+ /* user-specified newworld ROMs take precedence */
+ if( (fd=open_io("pseudo:,nwrom")) >= 0 ) {
+ entry = (char*)load_newworld_rom( fd );
+ close_io( fd );
+ }
+
+ /* determine boot volume */
+ for( bootunit=-1, type=0; bootunit==-1 && type<3 ; type++ ) {
+ for( i=0; !OSI_ABlkDiskInfo(0, i, &info) ; i++ ) {
+ if( type<=1 && !(info.flags & ABLK_BOOT_HINT) )
+ continue;
+ if( type>1 && (info.flags & ABLK_BOOT_HINT) )
+ continue;
+
+ for( j=0; !entry && j<32; j++ ) {
+ snprintf( spec, sizeof(spec), "%s/disk@%x:%d",
+ path, i, j );
+ entry = newworld_load( path, spec, (!type || type==2) );
+ }
+ if( entry ) {
+ bootunit = i;
+ break;
+ }
+ }
+ }
+
+ if( entry ) {
+ OSI_ABlkBlessDisk( 0 /*channel*/, bootunit );
+
+ update_nvram();
+ transfer_control_to_elf( (unsigned long)entry );
+ /* won't come here */
+ return;
+ }
+
+ printk("\n--- No bootable disk was found! -----------------------------\n");
+ printk("If this is an oldworld machine, try booting from the MacOS\n");
+ printk("install CD and install MacOS from within MOL.\n");
+ printk("-------------------------------------------------------------\n");
+ exit(1);
+}
+
+
+/************************************************************************/
+/* yaboot booting */
+/************************************************************************/
+
+static void
+yaboot_startup( void )
+{
+ const char *paths[] = { "pseudo:,ofclient", "pseudo:,yaboot", NULL };
+ unsigned long entry;
+ int i, fd;
+
+ for( i=0; paths[i]; i++ ) {
+ if( (fd=open_io(paths[i])) == -1 )
+ continue;
+ (void) load_elf_rom( &entry, fd );
+ close_io( fd );
+ encode_bootpath( paths[i], "" );
+
+ update_nvram();
+ transfer_control_to_elf( entry );
+ /* won't come here */
+ }
+ printk("*** Boot failure! No secondary bootloader specified ***\n");
+ exit(1);
+}
+
+
+/************************************************************************/
+/* entry */
+/************************************************************************/
+
+void
+boot( void )
+{
+ fword("update-chosen");
+ if( find_dev("/mol-platform") )
+ yaboot_startup();
+ else
+ newworld_startup();
+}
Code Review / kvmfornfv.git / blobdiff