/* * 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 #include #ifndef CONFIG_DEBUG_GENERIC #undef PrintDebug #define PrintDebug(fmt, args...) #endif typedef enum {GENERIC_IGNORE, GENERIC_PASSTHROUGH, GENERIC_PRINT_AND_PASSTHROUGH, GENERIC_PRINT_AND_IGNORE} generic_mode_t; struct generic_internal { struct list_head port_list; uint_t num_port_ranges; }; struct port_range { uint_t start; uint_t end; generic_mode_t mode; 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(uint16_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,((uint16_t*)src)[0]); break; case 4: v3_outdw(port,((uint32_t *)src)[0]); break; default: for (i = 0; i < length; i++) { v3_outb(port, ((uchar_t *)src)[i]); } } PrintDebug(" done\n"); return length; } static int generic_read_port_passthrough(uint16_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: ((uint16_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); } } 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(uint16_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(uint16_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_free(struct vm_device * dev) { struct generic_internal * state = (struct generic_internal *)(dev->private_data); struct port_range * tmp; struct port_range * cur; PrintDebug("generic: deinit_device\n"); 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); } generic_reset_device(dev); return 0; } static struct v3_device_ops dev_ops = { .free = generic_free, .reset = generic_reset_device, .start = generic_start_device, .stop = generic_stop_device, }; static int add_port_range(struct vm_device * dev, uint_t start, uint_t end, generic_mode_t mode) { struct generic_internal * state = (struct generic_internal *)(dev->private_data); struct port_range * range = (struct port_range *)V3_Malloc(sizeof(struct port_range)); uint_t i = 0; range->start = start; range->end = end; range->mode = mode; PrintDebug("generic: Adding Port Range: 0x%x to 0x%x as %s\n", start, end, (mode == GENERIC_PRINT_AND_PASSTHROUGH) ? "print-and-passthrough" : "print-and-ignore"); for (i = start; i <= end; i++) { if (mode == GENERIC_PRINT_AND_PASSTHROUGH) { if (v3_dev_hook_io(dev, i, &generic_read_port_passthrough, &generic_write_port_passthrough) == -1) { PrintError("generic: can't hook port 0x%x (already hooked?)\n", i); return -1; } } else if (mode == GENERIC_PRINT_AND_IGNORE) { if (v3_dev_hook_io(dev, i, &generic_read_port_ignore, &generic_write_port_ignore) == -1) { PrintError("generic: can't hook port 0x%x (already hooked?)\n", i); return -1; } } } list_add(&(range->range_link), &(state->port_list)); state->num_port_ranges++; return 0; } static int generic_init(struct guest_info * vm, v3_cfg_tree_t * cfg) { struct generic_internal * state = (struct generic_internal *)V3_Malloc(sizeof(struct generic_internal)); char * name = v3_cfg_val(cfg, "name"); v3_cfg_tree_t * port_cfg = v3_cfg_subtree(cfg, "ports"); INIT_LIST_HEAD(&(state->port_list)); state->num_port_ranges = 0; struct vm_device * dev = v3_allocate_device(name, &dev_ops, state); if (v3_attach_device(vm, dev) == -1) { PrintError("Could not attach device %s\n", name); return -1; } PrintDebug("generic: init_device\n"); generic_reset_device(dev); // scan port list.... while (port_cfg) { uint16_t start = atox(v3_cfg_val(port_cfg, "start")); uint16_t end = atox(v3_cfg_val(port_cfg, "end")); char * mode_str = v3_cfg_val(port_cfg, "mode"); generic_mode_t mode = GENERIC_IGNORE; if (strcasecmp(mode_str, "print_and_ignore") == 0) { mode = GENERIC_PRINT_AND_IGNORE; } else if (strcasecmp(mode_str, "print_and_passthrough") == 0) { mode = GENERIC_PRINT_AND_PASSTHROUGH; } else { PrintError("Invalid Mode %s\n", mode_str); return -1; } if (add_port_range(dev, start, end, mode) == -1) { PrintError("Could not add port range %d-%d\n", start, end); return -1; } port_cfg = v3_cfg_next_branch(port_cfg); } return 0; } device_register("GENERIC", generic_init)