diff options
Diffstat (limited to 'qemu/roms/openbios/arch/ppc/mol/pseudodisk.c')
-rw-r--r-- | qemu/roms/openbios/arch/ppc/mol/pseudodisk.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/qemu/roms/openbios/arch/ppc/mol/pseudodisk.c b/qemu/roms/openbios/arch/ppc/mol/pseudodisk.c new file mode 100644 index 000000000..a98e54845 --- /dev/null +++ b/qemu/roms/openbios/arch/ppc/mol/pseudodisk.c @@ -0,0 +1,178 @@ +/* + * Creation Date: <2003/11/26 16:55:47 samuel> + * Time-stamp: <2004/01/07 19:41:54 samuel> + * + * <pseudodisk.c> + * + * pseudodisk (contains files exported from linux) + * + * Copyright (C) 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 + * version 2 + * + */ + +#include "config.h" +#include "libopenbios/bindings.h" +#include "osi_calls.h" +#include "libc/string.h" +#include "libopenbios/ofmem.h" +#include "mol/prom.h" +#include "mol/mol.h" +#include "osi_calls.h" +#include "pseudofs_sh.h" + +typedef struct { + int seekpos; + int fd; + char *myargs; + char *name; + int size; +} pdisk_data_t; + + +DECLARE_NODE( pdisk, INSTALL_OPEN, sizeof(pdisk_data_t), "/mol/pseudo-disk/disk" ); + +static void +pdisk_open( pdisk_data_t *pb ) +{ + char *ep, *name = NULL; + int part; + + pb->myargs = my_args_copy(); + /* printk("pdisk-open: %s\n", pb->myargs ); */ + + part = strtol( pb->myargs, &ep, 10 ); + if( *ep ) { + if( (name=strchr(pb->myargs, ',')) ) { + *name = 0; + name++; + } else { + name = pb->myargs; + } + } + if( part ) + goto err; + + if( !name || !strlen(name) ) + pb->fd = -1; + else { + if( (pb->fd=PseudoFSOpen(name)) < 0 ) + goto err; + pb->size = PseudoFSGetSize( pb->fd ); + } + pb->name = name; + RET( -1 ); + err: + free( pb->myargs ); + RET(0); +} + +/* ( addr len -- actual ) */ +static void +pdisk_read( pdisk_data_t *pb ) +{ + int len = POP(); + char *dest = (char*)POP(); + int cnt; + + if( pb->fd < 0 ) { + memset( dest, 0, len ); + PUSH(len); + return; + } + /* dest is not "mol-DMA" safe (might have a nontrivial mapping) */ + for( cnt=0; cnt<len; ) { + char buf[2048]; + int n = MIN( len-cnt, sizeof(buf) ); + + n = PseudoFSRead( pb->fd, pb->seekpos, buf, n ); + if( n <= 0 ) + break; + + memcpy( dest+cnt, buf, n ); + cnt += n; + pb->seekpos += n; + } + PUSH( cnt ); +} + +/* ( addr len -- actual ) */ +static void +pdisk_write( pdisk_data_t *pb ) +{ + POP(); POP(); PUSH(-1); + printk("pdisk write\n"); +} + +/* ( pos.lo pos.hi -- status ) */ +static void +pdisk_seek( pdisk_data_t *pb ) +{ + int pos_lo; + POP(); + pos_lo = POP(); + + if( pb->fd >= 0 ) { + if( pos_lo == -1 ) + pos_lo = pb->size; + } + + pb->seekpos = pos_lo; + + PUSH(0); /* ??? */ +} + +/* ( -- pos.d ) */ +static void +pdisk_tell( pdisk_data_t *pb ) +{ + DPUSH( pb->seekpos ); +} + +/* ( -- cstr ) */ +static void +pdisk_get_path( pdisk_data_t *pb ) +{ + PUSH( (int)pb->name ); +} + +/* ( -- cstr ) */ +static void +pdisk_get_fstype( pdisk_data_t *pb ) +{ + PUSH( (int)"PSEUDO" ); +} + +/* ( -- cstr ) */ +static void +pdisk_volume_name( pdisk_data_t *pb ) +{ + PUSH( (int)"Virtual Volume" ); +} + +static void +pdisk_block_size( pdisk_data_t *pb ) +{ + PUSH(1); +} + +NODE_METHODS( pdisk ) = { + { "open", pdisk_open }, + { "read", pdisk_read }, + { "write", pdisk_write }, + { "seek", pdisk_seek }, + { "tell", pdisk_tell }, + { "block-size", pdisk_block_size }, + { "get-path", pdisk_get_path }, + { "get-fstype", pdisk_get_fstype }, + { "volume-name", pdisk_volume_name }, +}; + +void +pseudodisk_init( void ) +{ + REGISTER_NODE( pdisk ); +} |