From 1beaaac8fa81996c963b321593f087955148f6dc Mon Sep 17 00:00:00 2001
From: Blue Swirl <blauwirbel@gmail.com>
Date: Thu, 25 Dec 2008 10:38:40 +0000
Subject: [PATCH] Allow yaboot to read files from cdrom (Laurent Vivier)

git-svn-id: svn://coreboot.org/openbios/openbios-devel@325 f158a5a8-5612-0410-a976-696ce0be7e32
---
 arch/ppc/qemu/main.c  | 22 ++++++++++++++--------
 modules/filesystems.c |  7 +++++++
 modules/mac-parts.c   |  2 +-
 3 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/arch/ppc/qemu/main.c b/arch/ppc/qemu/main.c
index f778e55..facf7d0 100644
--- a/arch/ppc/qemu/main.c
+++ b/arch/ppc/qemu/main.c
@@ -61,10 +61,12 @@ load_elf_rom( ulong *elf_entry, int fd )
 	/* the ELF-image (usually) starts at offset 0x4000 */
 	if( (elf_offs=find_elf(fd)) < 0 ) {
                 ELF_DPRINTF("----> %s is not an ELF image\n", get_file_path(fd));
-		exit(1);
+		return -1;
+	}
+	if( !(phdr=elf_readhdrs(fd, elf_offs, &ehdr)) ) {
+		ELF_DPRINTF("elf_readhdrs failed\n");
+		return -1;
 	}
-	if( !(phdr=elf_readhdrs(fd, elf_offs, &ehdr)) )
-		fatal_error("elf_readhdrs failed\n");
 
 	*elf_entry = ehdr.e_entry;
 
@@ -89,8 +91,10 @@ load_elf_rom( ulong *elf_entry, int fd )
 			fatal_error("Claim failed!\n");
 
 		addr = (char*)phdr[i].p_vaddr;
-		if( read_io(fd, addr, s) != s )
-			fatal_error("read failed\n");
+		if( read_io(fd, addr, s) != s ) {
+			ELF_DPRINTF("read failed\n");
+			return -1;
+		}
 
 		flush_icache_range( addr, addr+s );
 
@@ -116,14 +120,16 @@ static void
 try_path(const char *path, const char *param)
 {
     ulong elf_entry;
-    int fd;
+    int fd, ret;
 
     ELF_DPRINTF("Trying %s %s\n", path, param);
     if ((fd = open_io(path)) == -1) {
         ELF_DPRINTF("Can't open %s\n", path);
         return;
     }
-    (void) load_elf_rom( &elf_entry, fd );
+    ret = load_elf_rom( &elf_entry, fd );
+    if (ret < 0)
+        return;
     close_io( fd );
     encode_bootpath( path, param );
 
@@ -258,8 +264,8 @@ yaboot_startup( void )
                     POP();
                     param = pop_fstr_copy();
                 }
-                try_bootinfo(path);
                 try_path(path, param);
+                try_bootinfo(path);
             } else {
                 char boot_device = nvram_read(0x34);
 
diff --git a/modules/filesystems.c b/modules/filesystems.c
index 5a4d9fe..726bcb9 100644
--- a/modules/filesystems.c
+++ b/modules/filesystems.c
@@ -255,6 +255,12 @@ files_probe( files_info_t *dummy )
 	PUSH( ret );
 }
 
+static void
+files_block_size( files_info_t *dummy )
+{
+	PUSH(512);
+}
+
 static void
 files_initializer( files_info_t *dummy )
 {
@@ -269,6 +275,7 @@ NODE_METHODS( files ) = {
 	{ "write",		files_write 		},
 	{ "seek",		files_seek 		},
 	{ "tell",		files_tell		},
+	{ "block-size",		files_block_size	},
 
 	/* special */
 	{ "reopen",		files_reopen 		},
diff --git a/modules/mac-parts.c b/modules/mac-parts.c
index 1eb93dd..96464a4 100644
--- a/modules/mac-parts.c
+++ b/modules/mac-parts.c
@@ -55,7 +55,7 @@ macparts_open( macparts_info_t *di )
 		free( str );
 	}
 	if( parnum < 0 )
-		parnum = 1;
+		parnum = 0;
 
 	DPRINTF("macparts_open %d\n", parnum);
 	SEEK( 0 );