X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm_io.c;fp=palacios%2Fsrc%2Fpalacios%2Fvmm_io.c;h=514d8e10e92bbcd9fdc7cb6846043add6aa26b8f;hp=0000000000000000000000000000000000000000;hb=ddc16b0737cf58f7aa90a69c6652cdf4090aec51;hpb=626595465a2c6987606a6bc697df65130ad8c2d3 diff --git a/palacios/src/palacios/vmm_io.c b/palacios/src/palacios/vmm_io.c new file mode 100644 index 0000000..514d8e1 --- /dev/null +++ b/palacios/src/palacios/vmm_io.c @@ -0,0 +1,310 @@ +/* + * 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, Jack Lange + * Copyright (c) 2008, The V3VEE Project + * All rights reserved. + * + * Author: 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 + + + + +#ifndef DEBUG_IO +#undef PrintDebug +#define PrintDebug(fmt, args...) +#endif + + +static int default_write(ushort_t port, void *src, uint_t length, void * priv_data); +static int default_read(ushort_t port, void * dst, uint_t length, void * priv_data); + + +void v3_init_vmm_io_map(struct guest_info * info) { + struct vmm_io_map * io_map = &(info->io_map); + io_map->num_ports = 0; + io_map->head = NULL; +} + + + + + +static int add_io_hook(struct vmm_io_map * io_map, struct vmm_io_hook * io_hook) { + + if (!(io_map->head)) { + io_map->head = io_hook; + io_map->num_ports = 1; + return 0; + } else if (io_map->head->port > io_hook->port) { + io_hook->next = io_map->head; + + io_map->head->prev = io_hook; + io_map->head = io_hook; + io_map->num_ports++; + + return 0; + } else { + struct vmm_io_hook * tmp_hook = io_map->head; + + while ((tmp_hook->next) && + (tmp_hook->next->port <= io_hook->port)) { + tmp_hook = tmp_hook->next; + } + + if (tmp_hook->port == io_hook->port) { + //tmp_hook->read = io_hook->read; + //tmp_hook->write = io_hook->write; + //V3_Free(io_hook); + return -1; + } else { + io_hook->prev = tmp_hook; + io_hook->next = tmp_hook->next; + + if (tmp_hook->next) { + tmp_hook->next->prev = io_hook; + } + + tmp_hook->next = io_hook; + + io_map->num_ports++; + return 0; + } + } + return -1; +} + +static int remove_io_hook(struct vmm_io_map * io_map, struct vmm_io_hook * io_hook) { + if (io_map->head == io_hook) { + io_map->head = io_hook->next; + } else if (io_hook->prev) { + io_hook->prev->next = io_hook->next; + } else { + return -1; + // data corruption failure + } + + if (io_hook->next) { + io_hook->next->prev = io_hook->prev; + } + + io_map->num_ports--; + + return 0; +} + + + + + +int v3_hook_io_port(struct guest_info * info, uint_t port, + int (*read)(ushort_t port, void * dst, uint_t length, void * priv_data), + int (*write)(ushort_t port, void * src, uint_t length, void * priv_data), + void * priv_data) { + struct vmm_io_map * io_map = &(info->io_map); + struct vmm_io_hook * io_hook = (struct vmm_io_hook *)V3_Malloc(sizeof(struct vmm_io_hook)); + + io_hook->port = port; + + if (!read) { + io_hook->read = &default_read; + } else { + io_hook->read = read; + } + + if (!write) { + io_hook->write = &default_write; + } else { + io_hook->write = write; + } + + io_hook->next = NULL; + io_hook->prev = NULL; + + io_hook->priv_data = priv_data; + + if (add_io_hook(io_map, io_hook) != 0) { + V3_Free(io_hook); + return -1; + } + + return 0; +} + +int v3_unhook_io_port(struct guest_info * info, uint_t port) { + struct vmm_io_map * io_map = &(info->io_map); + struct vmm_io_hook * hook = v3_get_io_hook(io_map, port); + + if (hook == NULL) { + return -1; + } + + remove_io_hook(io_map, hook); + return 0; +} + + +struct vmm_io_hook * v3_get_io_hook(struct vmm_io_map * io_map, uint_t port) { + struct vmm_io_hook * tmp_hook; + FOREACH_IO_HOOK(*io_map, tmp_hook) { + if (tmp_hook->port == port) { + return tmp_hook; + } + } + return NULL; +} + + + +void v3_print_io_map(struct vmm_io_map * io_map) { + struct vmm_io_hook * iter = io_map->head; + + PrintDebug("VMM IO Map (Entries=%d)\n", io_map->num_ports); + + while (iter) { + PrintDebug("IO Port: %hu (Read=%p) (Write=%p)\n", + iter->port, + (void *)(iter->read), (void *)(iter->write)); + } +} + + + +/* + * Write a byte to an I/O port. + */ +void v3_outb(ushort_t port, uchar_t value) { + __asm__ __volatile__ ( + "outb %b0, %w1" + : + : "a" (value), "Nd" (port) + ); +} + +/* + * Read a byte from an I/O port. + */ +uchar_t v3_inb(ushort_t port) { + uchar_t value; + + __asm__ __volatile__ ( + "inb %w1, %b0" + : "=a" (value) + : "Nd" (port) + ); + + return value; +} + +/* + * Write a word to an I/O port. + */ +void v3_outw(ushort_t port, ushort_t value) { + __asm__ __volatile__ ( + "outw %w0, %w1" + : + : "a" (value), "Nd" (port) + ); +} + +/* + * Read a word from an I/O port. + */ +ushort_t v3_inw(ushort_t port) { + ushort_t value; + + __asm__ __volatile__ ( + "inw %w1, %w0" + : "=a" (value) + : "Nd" (port) + ); + + return value; +} + +/* + * Write a double word to an I/O port. + */ +void v3_outdw(ushort_t port, uint_t value) { + __asm__ __volatile__ ( + "outl %0, %1" + : + : "a" (value), "Nd" (port) + ); +} + +/* + * Read a double word from an I/O port. + */ +uint_t v3_indw(ushort_t port) { + uint_t value; + + __asm__ __volatile__ ( + "inl %1, %0" + : "=a" (value) + : "Nd" (port) + ); + + return value; +} + + + + +/* FIX ME */ +static int default_write(ushort_t port, void *src, uint_t length, void * priv_data) { + /* + + if (length == 1) { + __asm__ __volatile__ ( + "outb %b0, %w1" + : + : "a" (*dst), "Nd" (port) + ); + } else if (length == 2) { + __asm__ __volatile__ ( + "outw %b0, %w1" + : + : "a" (*dst), "Nd" (port) + ); + } else if (length == 4) { + __asm__ __volatile__ ( + "outw %b0, %w1" + : + : "a" (*dst), "Nd" (port) + ); + } + */ + return 0; +} + +static int default_read(ushort_t port, void * dst, uint_t length, void * priv_data) { + + /* + uchar_t value; + + __asm__ __volatile__ ( + "inb %w1, %b0" + : "=a" (value) + : "Nd" (port) + ); + + return value; + */ + + return 0; +}