From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001
From: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 14:33:42 +0000
Subject: Add submodule dependency files

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
---
 roms/openbios/arch/ppc/mol/main.c | 370 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 370 insertions(+)
 create mode 100644 roms/openbios/arch/ppc/mol/main.c

(limited to 'roms/openbios/arch/ppc/mol/main.c')

diff --git a/roms/openbios/arch/ppc/mol/main.c b/roms/openbios/arch/ppc/mol/main.c
new file mode 100644
index 000000000..f6ed934d0
--- /dev/null
+++ b/roms/openbios/arch/ppc/mol/main.c
@@ -0,0 +1,370 @@
+/*
+ *   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();
+}
-- 
cgit 1.2.3-korg