[U-Boot] [PATCH 4/9] efi_loader: Add boot time services
Alexander Graf
agraf at suse.de
Tue Dec 22 14:57:51 CET 2015
When an EFI application runs, it has access to a few descriptor and callback
tables to instruct the EFI compliant firmware to do things for it. The bulk
of those interfaces are "boot time services". They handle all object management,
and memory allocation.
This patch adds support for the boot time services and also exposes a system
table, which is the point of entry descriptor table for EFI payloads.
Signed-off-by: Alexander Graf <agraf at suse.de>
---
include/efi_loader.h | 41 +++
lib/efi_loader/efi_boottime.c | 838 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 879 insertions(+)
create mode 100644 lib/efi_loader/efi_boottime.c
diff --git a/include/efi_loader.h b/include/efi_loader.h
index da82354..ed7c389 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -24,14 +24,55 @@
#include <efi_api.h>
#include <linux/list.h>
+/* #define DEBUG_EFI */
+
+#ifdef DEBUG_EFI
+#define EFI_ENTRY(format, ...) do { \
+ efi_restore_gd(); \
+ printf("EFI: Entry %s(" format ")\n", __func__, ##__VA_ARGS__); \
+ } while(0)
+#else
+#define EFI_ENTRY(format, ...) do { \
+ efi_restore_gd(); \
+ } while(0)
+#endif
+
+#define EFI_EXIT(ret) efi_exit_func(ret);
+
+extern struct efi_system_table systab;
+
extern const efi_guid_t efi_guid_device_path;
extern const efi_guid_t efi_guid_loaded_image;
+struct efi_class_map {
+ const efi_guid_t *guid;
+ const void *interface;
+};
+
+struct efi_handler {
+ const efi_guid_t *guid;
+ efi_status_t (EFIAPI *open)(void *handle,
+ efi_guid_t *protocol, void **protocol_interface,
+ void *agent_handle, void *controller_handle,
+ uint32_t attributes);
+};
+
+struct efi_object {
+ struct list_head link;
+ struct efi_handler protocols[4];
+ void *handle;
+};
+extern struct list_head efi_obj_list;
+
efi_status_t efi_return_handle(void *handle,
efi_guid_t *protocol, void **protocol_interface,
void *agent_handle, void *controller_handle,
uint32_t attributes);
+void efi_timer_check(void);
void *efi_load_pe(void *efi, struct efi_loaded_image *loaded_image_info);
+void efi_save_gd(void);
+void efi_restore_gd(void);
+efi_status_t efi_exit_func(efi_status_t ret);
#define EFI_LOADER_POOL_SIZE (128 * 1024 * 1024)
void *efi_loader_alloc(uint64_t len);
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
new file mode 100644
index 0000000..ed95962
--- /dev/null
+++ b/lib/efi_loader/efi_boottime.c
@@ -0,0 +1,838 @@
+/*
+ * EFI application boot time services
+ *
+ * Copyright (c) 2015 Alexander Graf
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ *
+ * SPDX-License-Identifier: LGPL-2.1+
+ */
+
+#define DEBUG_EFI
+
+#include <common.h>
+#include <efi_loader.h>
+#include <malloc.h>
+#include <asm/global_data.h>
+#include <libfdt_env.h>
+#include <u-boot/crc.h>
+#include <bootm.h>
+#include <inttypes.h>
+#include <watchdog.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * EFI can pass arbitrary additional "tables" containing vendor specific
+ * information to the payload. One such table is the FDT table which contains
+ * a pointer to a flattened device tree blob.
+ *
+ * In most cases we want to pass an FDT to the payload, so reserve one slot of
+ * config table space for it. The pointer gets populated by do_bootefi_exec().
+ */
+static struct efi_configuration_table efi_conf_table[] = {
+ {
+ .guid = EFI_FDT_GUID,
+ },
+};
+
+/*
+ * The "gd" pointer lives in a register on ARM and AArch64 that we declare
+ * fixed when compiling U-Boot. However, the payload does now know about that
+ * restriction so we need to manually swap its and our view of that register on
+ * EFI callback entry/exit.
+ */
+static volatile void *efi_gd, *app_gd;
+
+/* Called from do_bootefi_exec() */
+void efi_save_gd(void)
+{
+ efi_gd = gd;
+}
+
+/* Called on every callback entry */
+void efi_restore_gd(void)
+{
+ if (gd != efi_gd)
+ app_gd = gd;
+ gd = efi_gd;
+}
+
+/* Called on every callback exit */
+efi_status_t efi_exit_func(efi_status_t ret)
+{
+ gd = app_gd;
+ return ret;
+}
+
+static efi_status_t efi_unsupported(const char *funcname)
+{
+#ifdef DEBUG_EFI
+ printf("EFI: App called into unimplemented function %s\n", funcname);
+#endif
+ return EFI_EXIT(EFI_UNSUPPORTED);
+}
+
+static unsigned long efi_raise_tpl(unsigned long new_tpl)
+{
+ EFI_ENTRY("0x%lx", new_tpl);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static void efi_restore_tpl(unsigned long old_tpl)
+{
+ EFI_ENTRY("0x%lx", old_tpl);
+ EFI_EXIT(efi_unsupported(__func__));
+}
+
+static void *efi_alloc(uint64_t len, int memory_type)
+{
+ switch (memory_type) {
+ case EFI_LOADER_DATA:
+ return efi_loader_alloc(len);
+ default:
+ return malloc(len);
+ }
+}
+
+static efi_status_t efi_allocate_pages(int type, int memory_type,
+ unsigned long pages, uint64_t *memory)
+{
+ u64 len = pages << 12;
+ efi_status_t r = EFI_SUCCESS;
+
+ EFI_ENTRY("%d, %d, 0x%lx, %p", type, memory_type, pages, memory);
+
+ switch (type) {
+ case 0:
+ /* Any page means we can go to efi_alloc */
+ *memory = (unsigned long)efi_alloc(len, memory_type);
+ break;
+ case 1:
+ /* Max address */
+ if (gd->relocaddr < *memory) {
+ *memory = (unsigned long)efi_alloc(len, memory_type);
+ break;
+ }
+ r = EFI_UNSUPPORTED;
+ break;
+ case 2:
+ /* Exact address, grant it. The addr is already in *memory. */
+ break;
+ default:
+ r = EFI_UNSUPPORTED;
+ break;
+ }
+
+ return EFI_EXIT(r);
+}
+
+static efi_status_t efi_free_pages(uint64_t memory, unsigned long pages)
+{
+ /* We don't free, let's cross our fingers we have plenty RAM */
+ EFI_ENTRY("%"PRIx64", 0x%lx", memory, pages);
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+/*
+ * Returns the EFI memory map. In our case, this looks pretty simple:
+ *
+ * ____________________________ TOM
+ * | |
+ * | Second half of U-Boot |
+ * |____________________________| &__efi_runtime_stop
+ * | |
+ * | EFI Runtime Services |
+ * |____________________________| &__efi_runtime_start
+ * | |
+ * | First half of U-Boot |
+ * |____________________________| start of EFI loader allocation space
+ * | |
+ * | Free RAM |
+ * |____________________________| CONFIG_SYS_SDRAM_BASE
+ *
+ * All pointers are extended to live on a 4k boundary. After exiting the boot
+ * services, only the EFI Runtime Services chunk of memory stays alive.
+ */
+static efi_status_t efi_get_memory_map(unsigned long *memory_map_size,
+ struct efi_mem_desc *memory_map,
+ unsigned long *map_key,
+ unsigned long *descriptor_size,
+ uint32_t *descriptor_version)
+{
+ struct efi_mem_desc efi_memory_map[] = {
+ {
+ /* RAM before U-Boot */
+ .type = EFI_CONVENTIONAL_MEMORY,
+ .attribute = 1 << EFI_MEMORY_WB_SHIFT,
+ },
+ {
+ /* First half of U-Boot */
+ .type = EFI_LOADER_DATA,
+ .attribute = 1 << EFI_MEMORY_WB_SHIFT,
+ },
+ {
+ /* EFI Runtime Services */
+ .type = EFI_RUNTIME_SERVICES_CODE,
+ .attribute = 1 << EFI_MEMORY_WB_SHIFT,
+ },
+ {
+ /* Second half of U-Boot */
+ .type = EFI_LOADER_DATA,
+ .attribute = 1 << EFI_MEMORY_WB_SHIFT,
+ },
+ };
+ ulong runtime_start, runtime_end, runtime_len_pages, runtime_len;
+
+ EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map, map_key,
+ descriptor_size, descriptor_version);
+
+ runtime_start = (ulong)&__efi_runtime_start & ~0xfffULL;
+ runtime_end = ((ulong)&__efi_runtime_stop + 0xfff) & ~0xfffULL;
+ runtime_len_pages = (runtime_end - runtime_start) >> 12;
+ runtime_len = runtime_len_pages << 12;
+
+ /* Fill in where normal RAM is (up to U-Boot) */
+ efi_memory_map[0].num_pages = gd->relocaddr >> 12;
+#ifdef CONFIG_SYS_SDRAM_BASE
+ efi_memory_map[0].physical_start = CONFIG_SYS_SDRAM_BASE;
+ efi_memory_map[0].virtual_start = CONFIG_SYS_SDRAM_BASE;
+ efi_memory_map[0].num_pages -= CONFIG_SYS_SDRAM_BASE >> 12;
+#endif
+
+ /* Remove U-Boot from the available RAM view */
+ efi_memory_map[0].num_pages -= gd->mon_len >> 12;
+
+ /* Remove the malloc area from the available RAM view */
+ efi_memory_map[0].num_pages -= TOTAL_MALLOC_LEN >> 12;
+
+ /* Give us some space for the stack */
+ efi_memory_map[0].num_pages -= (16 * 1024 * 1024) >> 12;
+
+ /* Reserve the EFI loader pool */
+ efi_memory_map[0].num_pages -= EFI_LOADER_POOL_SIZE >> 12;
+
+ /* Cut out the runtime services */
+ efi_memory_map[2].physical_start = runtime_start;
+ efi_memory_map[2].virtual_start = efi_memory_map[2].physical_start;
+ efi_memory_map[2].num_pages = runtime_len_pages;
+
+ /* Allocate the rest to U-Boot */
+ efi_memory_map[1].physical_start = efi_memory_map[0].physical_start +
+ (efi_memory_map[0].num_pages << 12);
+ efi_memory_map[1].virtual_start = efi_memory_map[1].physical_start;
+ efi_memory_map[1].num_pages = (runtime_start -
+ efi_memory_map[1].physical_start) >> 12;
+
+ efi_memory_map[3].physical_start = runtime_start + runtime_len;
+ efi_memory_map[3].virtual_start = efi_memory_map[3].physical_start;
+ efi_memory_map[3].num_pages = (gd->ram_top -
+ efi_memory_map[3].physical_start) >> 12;
+
+ *memory_map_size = sizeof(efi_memory_map);
+
+ if (descriptor_size)
+ *descriptor_size = sizeof(struct efi_mem_desc);
+
+ if (*memory_map_size < sizeof(efi_memory_map)) {
+ return EFI_EXIT(EFI_BUFFER_TOO_SMALL);
+ }
+
+ if (memory_map)
+ memcpy(memory_map, efi_memory_map, sizeof(efi_memory_map));
+
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t efi_allocate_pool(int pool_type, unsigned long size, void **buffer)
+{
+ return efi_allocate_pages(0, pool_type, (size + 0xfff) >> 12, (void*)buffer);
+}
+
+static efi_status_t efi_free_pool(void *buffer)
+{
+ return efi_free_pages((ulong)buffer, 0);
+}
+
+/*
+ * Our event capabilities are very limited. Only support a single
+ * event to exist, so we don't need to maintain lists.
+ */
+static struct {
+ enum efi_event_type type;
+ u32 trigger_type;
+ u32 trigger_time;
+ u64 trigger_next;
+ unsigned long notify_tpl;
+ void (*notify_function) (void *event, void *context);
+ void *notify_context;
+} efi_event;
+
+static efi_status_t efi_create_event(enum efi_event_type type, ulong notify_tpl,
+ void (*notify_function) (void *event,
+ void *context),
+ void *notify_context, void **event)
+{
+ EFI_ENTRY("%d, 0x%lx, %p, %p", type, notify_tpl, notify_function,
+ notify_context);
+ if (efi_event.notify_function) {
+ /* We only support one event at a time */
+ return EFI_EXIT(EFI_UNSUPPORTED);
+ }
+
+ efi_event.type = type;
+ efi_event.notify_tpl = notify_tpl;
+ efi_event.notify_function = notify_function;
+ efi_event.notify_context = notify_context;
+ *event = &efi_event;
+
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+/*
+ * Our timers have to work without interrupts, so we check whenever keyboard
+ * input or disk accesses happen if enough time elapsed for it to fire.
+ */
+void efi_timer_check(void)
+{
+ u64 now = timer_get_us();
+
+ if (now >= efi_event.trigger_next) {
+ /* Triggering! */
+ if (efi_event.trigger_type == EFI_TIMER_PERIODIC)
+ efi_event.trigger_next += efi_event.trigger_time / 10;
+ efi_event.notify_function(&efi_event, efi_event.notify_context);
+ }
+
+ WATCHDOG_RESET();
+}
+
+static efi_status_t efi_set_timer(void *event, int type, uint64_t trigger_time)
+{
+ /* We don't have 64bit division available everywhere, so limit timer
+ * distances to 32bit bits. */
+ u32 trigger32 = trigger_time;
+
+ EFI_ENTRY("%p, %d, %"PRIx64, event, type, trigger_time);
+ if (event != &efi_event) {
+ /* We only support one event at a time */
+ return EFI_EXIT(EFI_UNSUPPORTED);
+ }
+
+ switch (type) {
+ case EFI_TIMER_STOP:
+ efi_event.trigger_next = -1ULL;
+ break;
+ case EFI_TIMER_PERIODIC:
+ case EFI_TIMER_RELATIVE:
+ efi_event.trigger_next = timer_get_us() + (trigger32 / 10);
+ break;
+ default:
+ return EFI_EXIT(EFI_UNSUPPORTED);
+ }
+ efi_event.trigger_type = type;
+ efi_event.trigger_time = trigger_time;
+
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t efi_wait_for_event(unsigned long num_events, void *event,
+ unsigned long *index)
+{
+ EFI_ENTRY("%ld, %p, %p", num_events, event, index);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_signal_event(void *event)
+{
+ EFI_ENTRY("%p", event);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_close_event(void *event)
+{
+ EFI_ENTRY("%p", event);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_check_event(void *event)
+{
+ EFI_ENTRY("%p", event);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_install_protocol_interface(void **handle,
+ efi_guid_t *protocol,
+ int protocol_interface_type,
+ void *protocol_interface)
+{
+ EFI_ENTRY("%p, %p, %d, %p", handle, protocol, protocol_interface_type,
+ protocol_interface);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+static efi_status_t efi_reinstall_protocol_interface(void *handle,
+ efi_guid_t *protocol,
+ void *old_interface,
+ void *new_interface)
+{
+ EFI_ENTRY("%p, %p, %p, %p", handle, protocol, old_interface,
+ new_interface);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_uninstall_protocol_interface(void *handle,
+ efi_guid_t *protocol,
+ void *protocol_interface)
+{
+ EFI_ENTRY("%p, %p, %p", handle, protocol, protocol_interface);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_register_protocol_notify(efi_guid_t *protocol,
+ void *event, void **registration)
+{
+ EFI_ENTRY("%p, %p, %p", protocol, event, registration);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static int efi_search(enum efi_locate_search_type search_type,
+ efi_guid_t *protocol, void *search_key,
+ struct efi_object *efiobj)
+{
+ int i;
+
+ switch (search_type) {
+ case all_handles:
+ return 0;
+ case by_register_notify:
+ return -1;
+ case by_protocol:
+ for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
+ const efi_guid_t *guid = efiobj->protocols[i].guid;
+ if (guid && !memcmp(guid, protocol, sizeof(efi_guid_t)))
+ return 0;
+ }
+ return -1;
+ }
+
+ return -1;
+}
+
+static efi_status_t efi_locate_handle(enum efi_locate_search_type search_type,
+ efi_guid_t *protocol, void *search_key,
+ unsigned long *buffer_size, efi_handle_t *buffer)
+{
+ struct list_head *lhandle;
+ unsigned long size = 0;
+
+ EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
+ buffer_size, buffer);
+
+ /* Count how much space we need */
+ list_for_each(lhandle, &efi_obj_list) {
+ struct efi_object *efiobj;
+ efiobj = list_entry(lhandle, struct efi_object, link);
+ if (!efi_search(search_type, protocol, search_key, efiobj)) {
+ size += sizeof(void*);
+ }
+ }
+
+ if (*buffer_size < size) {
+ *buffer_size = size;
+ return EFI_EXIT(EFI_BUFFER_TOO_SMALL);
+ }
+
+ /* Then fill the array */
+ list_for_each(lhandle, &efi_obj_list) {
+ struct efi_object *efiobj;
+ efiobj = list_entry(lhandle, struct efi_object, link);
+ if (!efi_search(search_type, protocol, search_key, efiobj)) {
+ *(buffer++) = efiobj->handle;
+ }
+ }
+
+ *buffer_size = size;
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t efi_locate_device_path(efi_guid_t *protocol,
+ struct efi_device_path **device_path,
+ efi_handle_t *device)
+{
+ EFI_ENTRY("%p, %p, %p", protocol, device_path, device);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_install_configuration_table(efi_guid_t *guid, void *table)
+{
+ EFI_ENTRY("%p, %p", guid, table);
+ /* Only allow overriding of the FDT */
+ if (memcmp(guid, &efi_conf_table[0].guid, sizeof(efi_guid_t)))
+ return EFI_EXIT(EFI_UNSUPPORTED);
+
+ efi_conf_table[0].table = table;
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t efi_load_image(bool boot_policy, efi_handle_t parent_image,
+ struct efi_device_path *file_path,
+ void *source_buffer, unsigned long source_size,
+ efi_handle_t *image_handle)
+{
+ static struct efi_object loaded_image_info_obj = {
+ .protocols = {
+ {
+ .guid = &efi_guid_loaded_image,
+ .open = &efi_return_handle,
+ },
+ },
+ };
+ struct efi_loaded_image *info;
+ struct efi_object *obj;
+
+ EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy, parent_image,
+ file_path, source_buffer, source_size, image_handle);
+ info = malloc(sizeof(*info));
+ obj = malloc(sizeof(loaded_image_info_obj));
+ memset(info, 0, sizeof(*info));
+ memcpy(obj, &loaded_image_info_obj, sizeof(loaded_image_info_obj));
+ obj->handle = info;
+ info->file_path = file_path;
+ info->reserved = efi_load_pe(source_buffer, info);
+ if (!info->reserved) {
+ free(info);
+ free(obj);
+ return EFI_EXIT(EFI_UNSUPPORTED);
+ }
+
+ *image_handle = info;
+ list_add_tail(&obj->link, &efi_obj_list);
+
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t efi_start_image(efi_handle_t image_handle,
+ unsigned long *exit_data_size,
+ s16 **exit_data)
+{
+ ulong (*entry)(void *image_handle, struct efi_system_table *st);
+ struct efi_loaded_image *info = image_handle;
+
+ EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
+ entry = info->reserved;
+
+ /* call the image! */
+ entry(image_handle, &systab);
+
+ /* Should usually never get here */
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t efi_exit(void *image_handle, long exit_status,
+ unsigned long exit_data_size,
+ uint16_t *exit_data)
+{
+ EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status,
+ exit_data_size, exit_data);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static struct efi_object *efi_search_obj(void *handle)
+{
+ struct list_head *lhandle;
+
+ list_for_each(lhandle, &efi_obj_list) {
+ struct efi_object *efiobj;
+ efiobj = list_entry(lhandle, struct efi_object, link);
+ if (efiobj->handle == handle)
+ return efiobj;
+ }
+
+ return NULL;
+}
+
+static efi_status_t efi_unload_image(void *image_handle)
+{
+ struct efi_object *efiobj;
+
+ EFI_ENTRY("%p", image_handle);
+ efiobj = efi_search_obj(image_handle);
+ if (efiobj)
+ list_del(&efiobj->link);
+
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t efi_exit_boot_services(void *image_handle,
+ unsigned long map_key)
+{
+ EFI_ENTRY("%p, %ld", image_handle, map_key);
+
+ /* This stops all lingering devices */
+ bootm_disable_interrupts();
+
+ /* Give the payload some time to boot */
+ WATCHDOG_RESET();
+
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t efi_get_next_monotonic_count(uint64_t *count)
+{
+ EFI_ENTRY("%p", count);
+ *count = timer_get_us();
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t efi_stall(unsigned long microseconds)
+{
+ EFI_ENTRY("%ld", microseconds);
+ udelay(microseconds);
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static efi_status_t efi_set_watchdog_timer(unsigned long timeout,
+ uint64_t watchdog_code,
+ unsigned long data_size,
+ uint16_t *watchdog_data)
+{
+ EFI_ENTRY("%ld, 0x%"PRIx64", %ld, %p", timeout, watchdog_code,
+ data_size, watchdog_data);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_connect_controller(efi_handle_t controller_handle,
+ efi_handle_t *driver_image_handle,
+ struct efi_device_path *remain_device_path,
+ bool recursive)
+{
+ EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle,
+ remain_device_path, recursive);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_disconnect_controller(void *controller_handle,
+ void *driver_image_handle,
+ void *child_handle)
+{
+ EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle,
+ child_handle);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_close_protocol(void *handle, efi_guid_t *protocol,
+ void *agent_handle, void *controller_handle)
+{
+ EFI_ENTRY("%p, %p, %p, %p", handle, protocol, agent_handle,
+ controller_handle);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_open_protocol_information(efi_handle_t handle,
+ efi_guid_t *protocol,
+ struct efi_open_protocol_info_entry **entry_buffer,
+ unsigned long *entry_count)
+{
+ EFI_ENTRY("%p, %p, %p, %p", handle, protocol, entry_buffer,
+ entry_count);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_protocols_per_handle(void *handle,
+ efi_guid_t ***protocol_buffer,
+ unsigned long *protocol_buffer_count)
+{
+ EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
+ protocol_buffer_count);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_locate_handle_buffer(
+ enum efi_locate_search_type search_type,
+ efi_guid_t *protocol, void *search_key,
+ unsigned long *no_handles, efi_handle_t **buffer)
+{
+ EFI_ENTRY("%d, %p, %p, %p, %p", search_type, protocol, search_key,
+ no_handles, buffer);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static struct efi_class_map efi_class_maps[] = {
+ {
+ .guid = &efi_guid_console_control,
+ .interface = &efi_console_control
+ },
+};
+
+static efi_status_t efi_locate_protocol(efi_guid_t *protocol, void *registration,
+ void **protocol_interface)
+{
+ efi_status_t r = EFI_UNSUPPORTED;
+ int i;
+
+ EFI_ENTRY("%p, %p, %p", protocol, registration, protocol_interface);
+ for (i = 0; i < ARRAY_SIZE(efi_class_maps); i++) {
+ struct efi_class_map *curmap = &efi_class_maps[i];
+ if (!memcmp(protocol, curmap->guid, sizeof(efi_guid_t))) {
+ *protocol_interface = (void*)curmap->interface;
+ return EFI_EXIT(EFI_SUCCESS);
+ }
+ }
+
+ return EFI_EXIT(r);
+}
+
+static efi_status_t efi_install_multiple_protocol_interfaces(void **handle, ...)
+{
+ EFI_ENTRY("%p", handle);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_uninstall_multiple_protocol_interfaces(void *handle, ...)
+{
+ EFI_ENTRY("%p", handle);
+ return EFI_EXIT(efi_unsupported(__func__));
+}
+
+static efi_status_t efi_calculate_crc32(void *data, unsigned long data_size,
+ uint32_t *crc32_p)
+{
+ EFI_ENTRY("%p, %ld", data, data_size);
+ *crc32_p = crc32(0, data, data_size);
+ return EFI_EXIT(EFI_SUCCESS);
+}
+
+static void efi_copy_mem(void *destination, void *source, unsigned long length)
+{
+ EFI_ENTRY("%p, %p, %ld", destination, source, length);
+ memcpy(destination, source, length);
+}
+
+static void efi_set_mem(void *buffer, unsigned long size, uint8_t value)
+{
+ EFI_ENTRY("%p, %ld, 0x%x", buffer, size, value);
+ memset(buffer, value, size);
+}
+
+static efi_status_t efi_open_protocol(void *handle, efi_guid_t *protocol,
+ void **protocol_interface, void *agent_handle,
+ void *controller_handle, uint32_t attributes)
+{
+ struct list_head *lhandle;
+ int i;
+ efi_status_t r = EFI_UNSUPPORTED;
+
+ EFI_ENTRY("%p, %p, %p, %p, %p, 0x%x", handle, protocol,
+ protocol_interface, agent_handle, controller_handle,
+ attributes);
+ list_for_each(lhandle, &efi_obj_list) {
+ struct efi_object *efiobj;
+ efiobj = list_entry(lhandle, struct efi_object, link);
+
+ if (efiobj->handle != handle)
+ continue;
+
+ for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
+ struct efi_handler *handler = &efiobj->protocols[i];
+ const efi_guid_t *hprotocol = handler->guid;
+ if (!hprotocol)
+ break;
+ if (!memcmp(hprotocol, protocol, sizeof(efi_guid_t))) {
+ r = handler->open(handle, protocol,
+ protocol_interface, agent_handle,
+ controller_handle, attributes);
+ goto out;
+ }
+ }
+ }
+
+out:
+ return EFI_EXIT(r);
+}
+
+static efi_status_t efi_handle_protocol(void *handle, efi_guid_t *protocol,
+ void **protocol_interface)
+{
+ EFI_ENTRY("%p, %p, %p", handle, protocol, protocol_interface);
+ return efi_open_protocol(handle, protocol, protocol_interface,
+ NULL, NULL, 0);
+}
+
+static const struct efi_boot_services efi_boot_services = {
+ .hdr = {
+ .headersize = sizeof(struct efi_table_hdr),
+ },
+ .raise_tpl = efi_raise_tpl,
+ .restore_tpl = efi_restore_tpl,
+ .allocate_pages = efi_allocate_pages,
+ .free_pages = efi_free_pages,
+ .get_memory_map = efi_get_memory_map,
+ .allocate_pool = efi_allocate_pool,
+ .free_pool = efi_free_pool,
+ .create_event = efi_create_event,
+ .set_timer = efi_set_timer,
+ .wait_for_event = efi_wait_for_event,
+ .signal_event = efi_signal_event,
+ .close_event = efi_close_event,
+ .check_event = efi_check_event,
+ .install_protocol_interface = efi_install_protocol_interface,
+ .reinstall_protocol_interface = efi_reinstall_protocol_interface,
+ .uninstall_protocol_interface = efi_uninstall_protocol_interface,
+ .handle_protocol = efi_handle_protocol,
+ .reserved = NULL,
+ .register_protocol_notify = efi_register_protocol_notify,
+ .locate_handle = efi_locate_handle,
+ .locate_device_path = efi_locate_device_path,
+ .install_configuration_table = efi_install_configuration_table,
+ .load_image = efi_load_image,
+ .start_image = efi_start_image,
+ .exit = (void*)efi_exit,
+ .unload_image = efi_unload_image,
+ .exit_boot_services = efi_exit_boot_services,
+ .get_next_monotonic_count = efi_get_next_monotonic_count,
+ .stall = efi_stall,
+ .set_watchdog_timer = efi_set_watchdog_timer,
+ .connect_controller = efi_connect_controller,
+ .disconnect_controller = efi_disconnect_controller,
+ .open_protocol = efi_open_protocol,
+ .close_protocol = efi_close_protocol,
+ .open_protocol_information = efi_open_protocol_information,
+ .protocols_per_handle = efi_protocols_per_handle,
+ .locate_handle_buffer = efi_locate_handle_buffer,
+ .locate_protocol = efi_locate_protocol,
+ .install_multiple_protocol_interfaces = efi_install_multiple_protocol_interfaces,
+ .uninstall_multiple_protocol_interfaces = efi_uninstall_multiple_protocol_interfaces,
+ .calculate_crc32 = efi_calculate_crc32,
+ .copy_mem = efi_copy_mem,
+ .set_mem = efi_set_mem,
+};
+
+
+static uint16_t firmware_vendor[] = { 'U','-','b','o','o','t',0 };
+struct efi_system_table systab = {
+ .hdr = {
+ .signature = EFI_SYSTEM_TABLE_SIGNATURE,
+ .revision = 0x20000, /* 2.0 */
+ .headersize = sizeof(struct efi_table_hdr),
+ },
+ .fw_vendor = (long)firmware_vendor,
+ .con_in = (void*)&efi_con_in,
+ .con_out = (void*)&efi_con_out,
+ .std_err = (void*)&efi_con_out,
+ .runtime = (void*)&efi_runtime_services,
+ .boottime = (void*)&efi_boot_services,
+ .nr_tables = 1,
+ .tables = (void*)efi_conf_table,
+};
--
2.1.4
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