/* * This file is part of the Palacios Virtual Machine Monitor developed * by the V3VEE Project with funding from the United States National * Science Foundation and the Department of Energy. * * The V3VEE Project is a joint project between Northwestern University * and the University of New Mexico. You can find out more at * http://www.v3vee.org * * Copyright (c) 2008, Peter Dinda * Copyright (c) 2008, The V3VEE Project * All rights reserved. * * Author: Peter Dinda * Contributor: 2008, Jack Lange * * * This is free software. You are permitted to use, * redistribute, and modify it as specified in the file "V3VEE_LICENSE". */ #include #include #include #include #ifndef DEBUG_GENERIC #undef PrintDebug #define PrintDebug(fmt, args...) #endif #define PORT_HOOKS 1 struct generic_internal { struct list_head port_list; uint_t num_port_ranges; }; struct port_range { uint_t start; uint_t end; uint_t type; struct list_head range_link; }; static int generic_reset_device(struct vm_device * dev) { PrintDebug("generic: reset device\n"); return 0; } static int generic_start_device(struct vm_device * dev) { PrintDebug("generic: start device\n"); return 0; } static int generic_stop_device(struct vm_device * dev) { PrintDebug("generic: stop device\n"); return 0; } static int generic_write_port_passthrough(ushort_t port, void * src, uint_t length, struct vm_device * dev) { uint_t i; PrintDebug("generic: writing 0x"); for (i = 0; i < length; i++) { PrintDebug("%x", ((uchar_t*)src)[i]); } PrintDebug(" to port 0x%x ... ", port); switch (length) { case 1: v3_outb(port,((uchar_t*)src)[0]); break; case 2: v3_outw(port,((ushort_t*)src)[0]); break; case 4: v3_outdw(port,((uint_t*)src)[0]); break; default: for (i = 0; i < length; i++) { v3_outb(port, ((uchar_t*)src)[i]); } } //switch length PrintDebug(" done\n"); return length; } static int generic_read_port_passthrough(ushort_t port, void * src, uint_t length, struct vm_device * dev) { uint_t i; PrintDebug("generic: reading 0x%x bytes from port 0x%x ...", length, port); switch (length) { case 1: ((uchar_t*)src)[0] = v3_inb(port); break; case 2: ((ushort_t*)src)[0] = v3_inw(port); break; case 4: ((uint_t*)src)[0] = v3_indw(port); break; default: for (i = 0; i < length; i++) { ((uchar_t*)src)[i] = v3_inb(port); } }//switch length PrintDebug(" done ... read 0x"); for (i = 0; i < length; i++) { PrintDebug("%x", ((uchar_t*)src)[i]); } PrintDebug("\n"); return length; } static int generic_write_port_ignore(ushort_t port, void * src, uint_t length, struct vm_device * dev) { uint_t i; PrintDebug("generic: writing 0x"); for (i = 0; i < length; i++) { PrintDebug("%x", ((uchar_t*)src)[i]); } PrintDebug(" to port 0x%x ... ignored\n", port); return length; } static int generic_read_port_ignore(ushort_t port, void * src, uint_t length, struct vm_device * dev) { PrintDebug("generic: reading 0x%x bytes from port 0x%x ...", length, port); memset((char*)src, 0, length); PrintDebug(" ignored (return zeroed buffer)\n"); return length; } static int generic_init_device(struct vm_device * dev) { struct generic_internal * state = (struct generic_internal *)(dev->private_data); PrintDebug("generic: init_device\n"); generic_reset_device(dev); if (PORT_HOOKS) { // This is a runtime conditional on a #define struct port_range * tmp = NULL; list_for_each_entry(tmp, &(state->port_list), range_link) { uint_t i = 0; PrintDebug("generic: hooking ports 0x%x to 0x%x as %s\n", tmp->start, tmp->end, (tmp->type == GENERIC_PRINT_AND_PASSTHROUGH) ? "print-and-passthrough" : "print-and-ignore"); for (i = tmp->start; i <= tmp->end; i++) { if (tmp->type == GENERIC_PRINT_AND_PASSTHROUGH) { if (v3_dev_hook_io(dev, i, &generic_read_port_passthrough, &generic_write_port_passthrough)) { PrintDebug("generic: can't hook port 0x%x (already hooked?)\n", i); } } else if (tmp->type == GENERIC_PRINT_AND_IGNORE) { if (v3_dev_hook_io(dev, i, &generic_read_port_ignore, &generic_write_port_ignore)) { PrintDebug("generic: can't hook port 0x%x (already hooked?)\n", i); } } } } } else { PrintDebug("generic: hooking ports not supported\n"); } return 0; } static int generic_deinit_device(struct vm_device * dev) { struct generic_internal * state = (struct generic_internal *)(dev->private_data); PrintDebug("generic: deinit_device\n"); if (PORT_HOOKS) { struct port_range * tmp; struct port_range * cur; list_for_each_entry_safe(cur, tmp, &(state->port_list), range_link) { uint_t i; PrintDebug("generic: unhooking ports 0x%x to 0x%x\n", cur->start, cur->end); for (i = cur->start; i <= cur->end; i++) { if (v3_dev_unhook_io(dev, i)) { PrintDebug("generic: can't unhook port 0x%x (already unhooked?)\n", i); } } list_del(&(cur->range_link)); state->num_port_ranges--; V3_Free(cur); } } else { PrintDebug("generic: unhooking ports not supported\n"); } generic_reset_device(dev); return 0; } static struct vm_device_ops dev_ops = { .init = generic_init_device, .deinit = generic_deinit_device, .reset = generic_reset_device, .start = generic_start_device, .stop = generic_stop_device, }; int v3_generic_add_port_range(struct vm_device * dev, uint_t start, uint_t end, uint_t type) { if (PORT_HOOKS) { struct generic_internal * state = (struct generic_internal *)(dev->private_data); struct port_range * range = (struct port_range *)V3_Malloc(sizeof(struct port_range)); range->start = start; range->end = end; range->type = type; PrintDebug("generic: Adding Port Range: 0x%x to 0x%x as %s\n", range->start, range->end, (range->type == GENERIC_PRINT_AND_PASSTHROUGH) ? "print-and-passthrough" : "print-and-ignore"); list_add(&(range->range_link), &(state->port_list)); state->num_port_ranges++; } else { PrintDebug("generic: hooking IO ports not supported\n"); return -1; } return 0; } struct vm_device * v3_create_generic() { struct generic_internal * generic_state = (struct generic_internal *)V3_Malloc(sizeof(struct generic_internal)); generic_state->num_port_ranges = 0; INIT_LIST_HEAD(&(generic_state->port_list)); struct vm_device * device = v3_create_device("GENERIC", &dev_ops, generic_state); return device; }