root / hw / nvram / fw_cfg.c @ 3d1bba20
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/*
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* QEMU Firmware configuration device emulation
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*
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* Copyright (c) 2008 Gleb Natapov
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw/hw.h" |
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#include "sysemu/sysemu.h" |
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#include "hw/isa/isa.h" |
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#include "hw/nvram/fw_cfg.h" |
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#include "hw/sysbus.h" |
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#include "trace.h" |
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#include "qemu/error-report.h" |
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#include "qemu/config-file.h" |
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#define FW_CFG_SIZE 2 |
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#define FW_CFG_DATA_SIZE 1 |
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typedef struct FWCfgEntry { |
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uint32_t len; |
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uint8_t *data; |
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void *callback_opaque;
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FWCfgCallback callback; |
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} FWCfgEntry; |
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struct FWCfgState {
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SysBusDevice busdev; |
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MemoryRegion ctl_iomem, data_iomem, comb_iomem; |
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uint32_t ctl_iobase, data_iobase; |
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FWCfgEntry entries[2][FW_CFG_MAX_ENTRY];
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FWCfgFiles *files; |
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uint16_t cur_entry; |
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uint32_t cur_offset; |
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Notifier machine_ready; |
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}; |
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|
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#define JPG_FILE 0 |
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#define BMP_FILE 1 |
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|
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static char *read_splashfile(char *filename, gsize *file_sizep, |
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int *file_typep)
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{ |
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GError *err = NULL;
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gboolean res; |
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gchar *content; |
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int file_type;
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unsigned int filehead; |
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int bmp_bpp;
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res = g_file_get_contents(filename, &content, file_sizep, &err); |
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if (res == FALSE) {
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error_report("failed to read splash file '%s'", filename);
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g_error_free(err); |
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return NULL; |
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} |
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|
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/* check file size */
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if (*file_sizep < 30) { |
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goto error;
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} |
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|
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/* check magic ID */
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filehead = ((content[0] & 0xff) + (content[1] << 8)) & 0xffff; |
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if (filehead == 0xd8ff) { |
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file_type = JPG_FILE; |
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} else if (filehead == 0x4d42) { |
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file_type = BMP_FILE; |
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} else {
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goto error;
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} |
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/* check BMP bpp */
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if (file_type == BMP_FILE) {
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bmp_bpp = (content[28] + (content[29] << 8)) & 0xffff; |
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if (bmp_bpp != 24) { |
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goto error;
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} |
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} |
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|
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/* return values */
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*file_typep = file_type; |
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return content;
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error:
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error_report("splash file '%s' format not recognized; must be JPEG "
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"or 24 bit BMP", filename);
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g_free(content); |
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return NULL; |
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} |
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static void fw_cfg_bootsplash(FWCfgState *s) |
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{ |
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int boot_splash_time = -1; |
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const char *boot_splash_filename = NULL; |
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char *p;
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char *filename, *file_data;
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gsize file_size; |
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int file_type;
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const char *temp; |
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/* get user configuration */
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QemuOptsList *plist = qemu_find_opts("boot-opts");
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QemuOpts *opts = QTAILQ_FIRST(&plist->head); |
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if (opts != NULL) { |
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temp = qemu_opt_get(opts, "splash");
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if (temp != NULL) { |
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boot_splash_filename = temp; |
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} |
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temp = qemu_opt_get(opts, "splash-time");
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if (temp != NULL) { |
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p = (char *)temp;
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boot_splash_time = strtol(p, (char **)&p, 10); |
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} |
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} |
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/* insert splash time if user configurated */
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if (boot_splash_time >= 0) { |
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/* validate the input */
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if (boot_splash_time > 0xffff) { |
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error_report("splash time is big than 65535, force it to 65535.");
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boot_splash_time = 0xffff;
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} |
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/* use little endian format */
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qemu_extra_params_fw[0] = (uint8_t)(boot_splash_time & 0xff); |
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qemu_extra_params_fw[1] = (uint8_t)((boot_splash_time >> 8) & 0xff); |
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fw_cfg_add_file(s, "etc/boot-menu-wait", qemu_extra_params_fw, 2); |
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} |
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/* insert splash file if user configurated */
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if (boot_splash_filename != NULL) { |
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filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, boot_splash_filename); |
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if (filename == NULL) { |
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error_report("failed to find file '%s'.", boot_splash_filename);
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return;
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} |
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/* loading file data */
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file_data = read_splashfile(filename, &file_size, &file_type); |
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if (file_data == NULL) { |
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g_free(filename); |
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return;
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} |
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if (boot_splash_filedata != NULL) { |
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g_free(boot_splash_filedata); |
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} |
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boot_splash_filedata = (uint8_t *)file_data; |
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boot_splash_filedata_size = file_size; |
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/* insert data */
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if (file_type == JPG_FILE) {
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fw_cfg_add_file(s, "bootsplash.jpg",
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boot_splash_filedata, boot_splash_filedata_size); |
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} else {
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fw_cfg_add_file(s, "bootsplash.bmp",
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boot_splash_filedata, boot_splash_filedata_size); |
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} |
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g_free(filename); |
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} |
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} |
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static void fw_cfg_reboot(FWCfgState *s) |
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{ |
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int reboot_timeout = -1; |
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char *p;
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const char *temp; |
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/* get user configuration */
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QemuOptsList *plist = qemu_find_opts("boot-opts");
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QemuOpts *opts = QTAILQ_FIRST(&plist->head); |
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if (opts != NULL) { |
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temp = qemu_opt_get(opts, "reboot-timeout");
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if (temp != NULL) { |
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p = (char *)temp;
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reboot_timeout = strtol(p, (char **)&p, 10); |
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} |
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} |
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/* validate the input */
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if (reboot_timeout > 0xffff) { |
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error_report("reboot timeout is larger than 65535, force it to 65535.");
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reboot_timeout = 0xffff;
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} |
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fw_cfg_add_file(s, "etc/boot-fail-wait", g_memdup(&reboot_timeout, 4), 4); |
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} |
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static void fw_cfg_write(FWCfgState *s, uint8_t value) |
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{ |
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int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
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FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK]; |
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trace_fw_cfg_write(s, value); |
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if (s->cur_entry & FW_CFG_WRITE_CHANNEL && e->callback &&
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s->cur_offset < e->len) { |
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e->data[s->cur_offset++] = value; |
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if (s->cur_offset == e->len) {
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e->callback(e->callback_opaque, e->data); |
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s->cur_offset = 0;
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} |
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} |
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} |
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static int fw_cfg_select(FWCfgState *s, uint16_t key) |
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{ |
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int ret;
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s->cur_offset = 0;
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if ((key & FW_CFG_ENTRY_MASK) >= FW_CFG_MAX_ENTRY) {
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s->cur_entry = FW_CFG_INVALID; |
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ret = 0;
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} else {
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s->cur_entry = key; |
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ret = 1;
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} |
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trace_fw_cfg_select(s, key, ret); |
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return ret;
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} |
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static uint8_t fw_cfg_read(FWCfgState *s)
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{ |
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int arch = !!(s->cur_entry & FW_CFG_ARCH_LOCAL);
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FWCfgEntry *e = &s->entries[arch][s->cur_entry & FW_CFG_ENTRY_MASK]; |
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uint8_t ret; |
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if (s->cur_entry == FW_CFG_INVALID || !e->data || s->cur_offset >= e->len)
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ret = 0;
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else
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ret = e->data[s->cur_offset++]; |
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trace_fw_cfg_read(s, ret); |
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return ret;
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} |
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static uint64_t fw_cfg_data_mem_read(void *opaque, hwaddr addr, |
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unsigned size)
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{ |
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return fw_cfg_read(opaque);
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} |
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static void fw_cfg_data_mem_write(void *opaque, hwaddr addr, |
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uint64_t value, unsigned size)
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{ |
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fw_cfg_write(opaque, (uint8_t)value); |
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} |
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static void fw_cfg_ctl_mem_write(void *opaque, hwaddr addr, |
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uint64_t value, unsigned size)
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{ |
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fw_cfg_select(opaque, (uint16_t)value); |
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} |
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static bool fw_cfg_ctl_mem_valid(void *opaque, hwaddr addr, |
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unsigned size, bool is_write) |
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{ |
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return is_write && size == 2; |
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} |
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|
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static uint64_t fw_cfg_comb_read(void *opaque, hwaddr addr, |
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unsigned size)
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{ |
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return fw_cfg_read(opaque);
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} |
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static void fw_cfg_comb_write(void *opaque, hwaddr addr, |
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uint64_t value, unsigned size)
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{ |
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switch (size) {
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case 1: |
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fw_cfg_write(opaque, (uint8_t)value); |
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break;
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case 2: |
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fw_cfg_select(opaque, (uint16_t)value); |
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break;
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} |
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} |
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|
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static bool fw_cfg_comb_valid(void *opaque, hwaddr addr, |
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unsigned size, bool is_write) |
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{ |
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return (size == 1) || (is_write && size == 2); |
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} |
300 |
|
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static const MemoryRegionOps fw_cfg_ctl_mem_ops = { |
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.write = fw_cfg_ctl_mem_write, |
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.endianness = DEVICE_NATIVE_ENDIAN, |
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.valid.accepts = fw_cfg_ctl_mem_valid, |
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}; |
306 |
|
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static const MemoryRegionOps fw_cfg_data_mem_ops = { |
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.read = fw_cfg_data_mem_read, |
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.write = fw_cfg_data_mem_write, |
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.endianness = DEVICE_NATIVE_ENDIAN, |
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.valid = { |
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.min_access_size = 1,
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.max_access_size = 1,
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}, |
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}; |
316 |
|
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static const MemoryRegionOps fw_cfg_comb_mem_ops = { |
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.read = fw_cfg_comb_read, |
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.write = fw_cfg_comb_write, |
320 |
.endianness = DEVICE_NATIVE_ENDIAN, |
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.valid.accepts = fw_cfg_comb_valid, |
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}; |
323 |
|
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static void fw_cfg_reset(DeviceState *d) |
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{ |
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FWCfgState *s = DO_UPCAST(FWCfgState, busdev.qdev, d); |
327 |
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fw_cfg_select(s, 0);
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} |
330 |
|
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/* Save restore 32 bit int as uint16_t
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This is a Big hack, but it is how the old state did it.
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Or we broke compatibility in the state, or we can't use struct tm
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*/
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|
336 |
static int get_uint32_as_uint16(QEMUFile *f, void *pv, size_t size) |
337 |
{ |
338 |
uint32_t *v = pv; |
339 |
*v = qemu_get_be16(f); |
340 |
return 0; |
341 |
} |
342 |
|
343 |
static void put_unused(QEMUFile *f, void *pv, size_t size) |
344 |
{ |
345 |
fprintf(stderr, "uint32_as_uint16 is only used for backward compatibility.\n");
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346 |
fprintf(stderr, "This functions shouldn't be called.\n");
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347 |
} |
348 |
|
349 |
static const VMStateInfo vmstate_hack_uint32_as_uint16 = { |
350 |
.name = "int32_as_uint16",
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351 |
.get = get_uint32_as_uint16, |
352 |
.put = put_unused, |
353 |
}; |
354 |
|
355 |
#define VMSTATE_UINT16_HACK(_f, _s, _t) \
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356 |
VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_hack_uint32_as_uint16, uint32_t)
|
357 |
|
358 |
|
359 |
static bool is_version_1(void *opaque, int version_id) |
360 |
{ |
361 |
return version_id == 1; |
362 |
} |
363 |
|
364 |
static const VMStateDescription vmstate_fw_cfg = { |
365 |
.name = "fw_cfg",
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366 |
.version_id = 2,
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367 |
.minimum_version_id = 1,
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368 |
.minimum_version_id_old = 1,
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369 |
.fields = (VMStateField []) { |
370 |
VMSTATE_UINT16(cur_entry, FWCfgState), |
371 |
VMSTATE_UINT16_HACK(cur_offset, FWCfgState, is_version_1), |
372 |
VMSTATE_UINT32_V(cur_offset, FWCfgState, 2),
|
373 |
VMSTATE_END_OF_LIST() |
374 |
} |
375 |
}; |
376 |
|
377 |
void fw_cfg_add_bytes(FWCfgState *s, uint16_t key, void *data, size_t len) |
378 |
{ |
379 |
int arch = !!(key & FW_CFG_ARCH_LOCAL);
|
380 |
|
381 |
key &= FW_CFG_ENTRY_MASK; |
382 |
|
383 |
assert(key < FW_CFG_MAX_ENTRY && len < UINT32_MAX); |
384 |
|
385 |
s->entries[arch][key].data = data; |
386 |
s->entries[arch][key].len = (uint32_t)len; |
387 |
} |
388 |
|
389 |
void fw_cfg_add_string(FWCfgState *s, uint16_t key, const char *value) |
390 |
{ |
391 |
size_t sz = strlen(value) + 1;
|
392 |
|
393 |
return fw_cfg_add_bytes(s, key, g_memdup(value, sz), sz);
|
394 |
} |
395 |
|
396 |
void fw_cfg_add_i16(FWCfgState *s, uint16_t key, uint16_t value)
|
397 |
{ |
398 |
uint16_t *copy; |
399 |
|
400 |
copy = g_malloc(sizeof(value));
|
401 |
*copy = cpu_to_le16(value); |
402 |
fw_cfg_add_bytes(s, key, copy, sizeof(value));
|
403 |
} |
404 |
|
405 |
void fw_cfg_add_i32(FWCfgState *s, uint16_t key, uint32_t value)
|
406 |
{ |
407 |
uint32_t *copy; |
408 |
|
409 |
copy = g_malloc(sizeof(value));
|
410 |
*copy = cpu_to_le32(value); |
411 |
fw_cfg_add_bytes(s, key, copy, sizeof(value));
|
412 |
} |
413 |
|
414 |
void fw_cfg_add_i64(FWCfgState *s, uint16_t key, uint64_t value)
|
415 |
{ |
416 |
uint64_t *copy; |
417 |
|
418 |
copy = g_malloc(sizeof(value));
|
419 |
*copy = cpu_to_le64(value); |
420 |
fw_cfg_add_bytes(s, key, copy, sizeof(value));
|
421 |
} |
422 |
|
423 |
void fw_cfg_add_callback(FWCfgState *s, uint16_t key, FWCfgCallback callback,
|
424 |
void *callback_opaque, void *data, size_t len) |
425 |
{ |
426 |
int arch = !!(key & FW_CFG_ARCH_LOCAL);
|
427 |
|
428 |
assert(key & FW_CFG_WRITE_CHANNEL); |
429 |
|
430 |
key &= FW_CFG_ENTRY_MASK; |
431 |
|
432 |
assert(key < FW_CFG_MAX_ENTRY && len <= UINT32_MAX); |
433 |
|
434 |
s->entries[arch][key].data = data; |
435 |
s->entries[arch][key].len = (uint32_t)len; |
436 |
s->entries[arch][key].callback_opaque = callback_opaque; |
437 |
s->entries[arch][key].callback = callback; |
438 |
} |
439 |
|
440 |
void fw_cfg_add_file(FWCfgState *s, const char *filename, |
441 |
void *data, size_t len)
|
442 |
{ |
443 |
int i, index;
|
444 |
size_t dsize; |
445 |
|
446 |
if (!s->files) {
|
447 |
dsize = sizeof(uint32_t) + sizeof(FWCfgFile) * FW_CFG_FILE_SLOTS; |
448 |
s->files = g_malloc0(dsize); |
449 |
fw_cfg_add_bytes(s, FW_CFG_FILE_DIR, s->files, dsize); |
450 |
} |
451 |
|
452 |
index = be32_to_cpu(s->files->count); |
453 |
assert(index < FW_CFG_FILE_SLOTS); |
454 |
|
455 |
fw_cfg_add_bytes(s, FW_CFG_FILE_FIRST + index, data, len); |
456 |
|
457 |
pstrcpy(s->files->f[index].name, sizeof(s->files->f[index].name),
|
458 |
filename); |
459 |
for (i = 0; i < index; i++) { |
460 |
if (strcmp(s->files->f[index].name, s->files->f[i].name) == 0) { |
461 |
trace_fw_cfg_add_file_dupe(s, s->files->f[index].name); |
462 |
return;
|
463 |
} |
464 |
} |
465 |
|
466 |
s->files->f[index].size = cpu_to_be32(len); |
467 |
s->files->f[index].select = cpu_to_be16(FW_CFG_FILE_FIRST + index); |
468 |
trace_fw_cfg_add_file(s, index, s->files->f[index].name, len); |
469 |
|
470 |
s->files->count = cpu_to_be32(index+1);
|
471 |
} |
472 |
|
473 |
static void fw_cfg_machine_ready(struct Notifier *n, void *data) |
474 |
{ |
475 |
size_t len; |
476 |
FWCfgState *s = container_of(n, FWCfgState, machine_ready); |
477 |
char *bootindex = get_boot_devices_list(&len);
|
478 |
|
479 |
fw_cfg_add_file(s, "bootorder", (uint8_t*)bootindex, len);
|
480 |
} |
481 |
|
482 |
FWCfgState *fw_cfg_init(uint32_t ctl_port, uint32_t data_port, |
483 |
hwaddr ctl_addr, hwaddr data_addr) |
484 |
{ |
485 |
DeviceState *dev; |
486 |
SysBusDevice *d; |
487 |
FWCfgState *s; |
488 |
|
489 |
dev = qdev_create(NULL, "fw_cfg"); |
490 |
qdev_prop_set_uint32(dev, "ctl_iobase", ctl_port);
|
491 |
qdev_prop_set_uint32(dev, "data_iobase", data_port);
|
492 |
d = SYS_BUS_DEVICE(dev); |
493 |
|
494 |
s = DO_UPCAST(FWCfgState, busdev.qdev, dev); |
495 |
|
496 |
if (!object_resolve_path("/machine/fw_cfg", NULL)) { |
497 |
object_property_add_child(qdev_get_machine(), "fw_cfg", OBJECT(s),
|
498 |
NULL);
|
499 |
} |
500 |
|
501 |
qdev_init_nofail(dev); |
502 |
|
503 |
if (ctl_addr) {
|
504 |
sysbus_mmio_map(d, 0, ctl_addr);
|
505 |
} |
506 |
if (data_addr) {
|
507 |
sysbus_mmio_map(d, 1, data_addr);
|
508 |
} |
509 |
fw_cfg_add_bytes(s, FW_CFG_SIGNATURE, (char *)"QEMU", 4); |
510 |
fw_cfg_add_bytes(s, FW_CFG_UUID, qemu_uuid, 16);
|
511 |
fw_cfg_add_i16(s, FW_CFG_NOGRAPHIC, (uint16_t)(display_type == DT_NOGRAPHIC)); |
512 |
fw_cfg_add_i16(s, FW_CFG_NB_CPUS, (uint16_t)smp_cpus); |
513 |
fw_cfg_add_i16(s, FW_CFG_BOOT_MENU, (uint16_t)boot_menu); |
514 |
fw_cfg_bootsplash(s); |
515 |
fw_cfg_reboot(s); |
516 |
|
517 |
s->machine_ready.notify = fw_cfg_machine_ready; |
518 |
qemu_add_machine_init_done_notifier(&s->machine_ready); |
519 |
|
520 |
return s;
|
521 |
} |
522 |
|
523 |
static int fw_cfg_init1(SysBusDevice *dev) |
524 |
{ |
525 |
FWCfgState *s = FROM_SYSBUS(FWCfgState, dev); |
526 |
|
527 |
memory_region_init_io(&s->ctl_iomem, &fw_cfg_ctl_mem_ops, s, |
528 |
"fwcfg.ctl", FW_CFG_SIZE);
|
529 |
sysbus_init_mmio(dev, &s->ctl_iomem); |
530 |
memory_region_init_io(&s->data_iomem, &fw_cfg_data_mem_ops, s, |
531 |
"fwcfg.data", FW_CFG_DATA_SIZE);
|
532 |
sysbus_init_mmio(dev, &s->data_iomem); |
533 |
/* In case ctl and data overlap: */
|
534 |
memory_region_init_io(&s->comb_iomem, &fw_cfg_comb_mem_ops, s, |
535 |
"fwcfg", FW_CFG_SIZE);
|
536 |
|
537 |
if (s->ctl_iobase + 1 == s->data_iobase) { |
538 |
sysbus_add_io(dev, s->ctl_iobase, &s->comb_iomem); |
539 |
} else {
|
540 |
if (s->ctl_iobase) {
|
541 |
sysbus_add_io(dev, s->ctl_iobase, &s->ctl_iomem); |
542 |
} |
543 |
if (s->data_iobase) {
|
544 |
sysbus_add_io(dev, s->data_iobase, &s->data_iomem); |
545 |
} |
546 |
} |
547 |
return 0; |
548 |
} |
549 |
|
550 |
static Property fw_cfg_properties[] = {
|
551 |
DEFINE_PROP_HEX32("ctl_iobase", FWCfgState, ctl_iobase, -1), |
552 |
DEFINE_PROP_HEX32("data_iobase", FWCfgState, data_iobase, -1), |
553 |
DEFINE_PROP_END_OF_LIST(), |
554 |
}; |
555 |
|
556 |
static void fw_cfg_class_init(ObjectClass *klass, void *data) |
557 |
{ |
558 |
DeviceClass *dc = DEVICE_CLASS(klass); |
559 |
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
560 |
|
561 |
k->init = fw_cfg_init1; |
562 |
dc->no_user = 1;
|
563 |
dc->reset = fw_cfg_reset; |
564 |
dc->vmsd = &vmstate_fw_cfg; |
565 |
dc->props = fw_cfg_properties; |
566 |
} |
567 |
|
568 |
static const TypeInfo fw_cfg_info = { |
569 |
.name = "fw_cfg",
|
570 |
.parent = TYPE_SYS_BUS_DEVICE, |
571 |
.instance_size = sizeof(FWCfgState),
|
572 |
.class_init = fw_cfg_class_init, |
573 |
}; |
574 |
|
575 |
static void fw_cfg_register_types(void) |
576 |
{ |
577 |
type_register_static(&fw_cfg_info); |
578 |
} |
579 |
|
580 |
type_init(fw_cfg_register_types) |