/*
* EFI application boot time services
*
* Copyright (c) 2016 Alexander Graf
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <div64.h>
#include <efi_loader.h>
#include <environment.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;
/* Task priority level */
static UINTN efi_tpl = TPL_APPLICATION;
/* This list contains all the EFI objects our payload has access to */
LIST_HEAD(efi_obj_list);
/*
* If we're running on nasty systems (32bit ARM booting into non-EFI Linux)
* we need to do trickery with caches. Since we don't want to break the EFI
* aware boot path, only apply hacks when loading exiting directly (breaking
* direct Linux EFI booting along the way - oh well).
*/
static bool efi_is_direct_boot = true;
/*
* 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_runtime_data efi_conf_table[2];
#ifdef CONFIG_ARM
/*
* The "gd" pointer lives in a register on ARM and AArch64 that we declare
* fixed when compiling U-Boot. However, the payload does not 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;
#endif
static int entry_count;
static int nesting_level;
/* Called on every callback entry */
int __efi_entry_check(void)
{
int ret = entry_count++ == 0;
#ifdef CONFIG_ARM
assert(efi_gd);
app_gd = gd;
gd = efi_gd;
#endif
return ret;
}
/* Called on every callback exit */
int __efi_exit_check(void)
{
int ret = --entry_count == 0;
#ifdef CONFIG_ARM
gd = app_gd;
#endif
return ret;
}
/* Called from do_bootefi_exec() */
void efi_save_gd(void)
{
#ifdef CONFIG_ARM
efi_gd = gd;
#endif
}
/*
* Special case handler for error/abort that just forces things back
* to u-boot world so we can dump out an abort msg, without any care
* about returning back to UEFI world.
*/
void efi_restore_gd(void)
{
#ifdef CONFIG_ARM
/* Only restore if we're already in EFI context */
if (!efi_gd)
return;
gd = efi_gd;
#endif
}
/*
* Two spaces per indent level, maxing out at 10.. which ought to be
* enough for anyone ;-)
*/
static const char *indent_string(int level)
{
const char *indent = " ";
const int max = strlen(indent);
level = min(max, level * 2);
return &indent[max - level];
}
const char *__efi_nesting(void)
{
return indent_string(nesting_level);
}
const char *__efi_nesting_inc(void)
{
return indent_string(nesting_level++);
}
const char *__efi_nesting_dec(void)
{
return indent_string(--nesting_level);
}
/*
* Queue an EFI event.
*
* This function queues the notification function of the event for future
* execution.
*
* The notification function is called if the task priority level of the
* event is higher than the current task priority level.
*
* For the SignalEvent service see efi_signal_event_ext.
*
* @event event to signal
*/
void efi_signal_event(struct efi_event *event)
{
if (event->notify_function) {
event->is_queued = true;
/* Check TPL */
if (efi_tpl >= event->notify_tpl)
return;
EFI_CALL_VOID(event->notify_function(event,
event->notify_context));
}
event->is_queued = false;
}
/*
* Write a debug message for an EPI API service that is not implemented yet.
*
* @funcname function that is not yet implemented
* @return EFI_UNSUPPORTED
*/
static efi_status_t efi_unsupported(const char *funcname)
{
debug("EFI: App called into unimplemented function %s\n", funcname);
return EFI_EXIT(EFI_UNSUPPORTED);
}
/*
* Raise the task priority level.
*
* This function implements the RaiseTpl service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @new_tpl new value of the task priority level
* @return old value of the task priority level
*/
static unsigned long EFIAPI efi_raise_tpl(UINTN new_tpl)
{
UINTN old_tpl = efi_tpl;
EFI_ENTRY("0x%zx", new_tpl);
if (new_tpl < efi_tpl)
debug("WARNING: new_tpl < current_tpl in %s\n", __func__);
efi_tpl = new_tpl;
if (efi_tpl > TPL_HIGH_LEVEL)
efi_tpl = TPL_HIGH_LEVEL;
EFI_EXIT(EFI_SUCCESS);
return old_tpl;
}
/*
* Lower the task priority level.
*
* This function implements the RestoreTpl service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @old_tpl value of the task priority level to be restored
*/
static void EFIAPI efi_restore_tpl(UINTN old_tpl)
{
EFI_ENTRY("0x%zx", old_tpl);
if (old_tpl > efi_tpl)
debug("WARNING: old_tpl > current_tpl in %s\n", __func__);
efi_tpl = old_tpl;
if (efi_tpl > TPL_HIGH_LEVEL)
efi_tpl = TPL_HIGH_LEVEL;
EFI_EXIT(EFI_SUCCESS);
}
/*
* Allocate memory pages.
*
* This function implements the AllocatePages service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @type type of allocation to be performed
* @memory_type usage type of the allocated memory
* @pages number of pages to be allocated
* @memory allocated memory
* @return status code
*/
static efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type,
unsigned long pages,
uint64_t *memory)
{
efi_status_t r;
EFI_ENTRY("%d, %d, 0x%lx, %p", type, memory_type, pages, memory);
r = efi_allocate_pages(type, memory_type, pages, memory);
return EFI_EXIT(r);
}
/*
* Free memory pages.
*
* This function implements the FreePages service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @memory start of the memory area to be freed
* @pages number of pages to be freed
* @return status code
*/
static efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory,
unsigned long pages)
{
efi_status_t r;
EFI_ENTRY("%"PRIx64", 0x%lx", memory, pages);
r = efi_free_pages(memory, pages);
return EFI_EXIT(r);
}
/*
* Get map describing memory usage.
*
* This function implements the GetMemoryMap service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @memory_map_size on entry the size, in bytes, of the memory map buffer,
* on exit the size of the copied memory map
* @memory_map buffer to which the memory map is written
* @map_key key for the memory map
* @descriptor_size size of an individual memory descriptor
* @descriptor_version version number of the memory descriptor structure
* @return status code
*/
static efi_status_t EFIAPI efi_get_memory_map_ext(
unsigned long *memory_map_size,
struct efi_mem_desc *memory_map,
unsigned long *map_key,
unsigned long *descriptor_size,
uint32_t *descriptor_version)
{
efi_status_t r;
EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map,
map_key, descriptor_size, descriptor_version);
r = efi_get_memory_map(memory_map_size, memory_map, map_key,
descriptor_size, descriptor_version);
return EFI_EXIT(r);
}
/*
* Allocate memory from pool.
*
* This function implements the AllocatePool service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @pool_type type of the pool from which memory is to be allocated
* @size number of bytes to be allocated
* @buffer allocated memory
* @return status code
*/
static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type,
unsigned long size,
void **buffer)
{
efi_status_t r;
EFI_ENTRY("%d, %ld, %p", pool_type, size, buffer);
r = efi_allocate_pool(pool_type, size, buffer);
return EFI_EXIT(r);
}
/*
* Free memory from pool.
*
* This function implements the FreePool service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @buffer start of memory to be freed
* @return status code
*/
static efi_status_t EFIAPI efi_free_pool_ext(void *buffer)
{
efi_status_t r;
EFI_ENTRY("%p", buffer);
r = efi_free_pool(buffer);
return EFI_EXIT(r);
}
static efi_status_t efi_create_handle(void **handle)
{
struct efi_object *obj;
efi_status_t r;
r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
sizeof(struct efi_object),
(void **)&obj);
if (r != EFI_SUCCESS)
return r;
memset(obj, 0, sizeof(struct efi_object));
obj->handle = obj;
list_add_tail(&obj->link, &efi_obj_list);
*handle = obj;
return r;
}
/*
* Our event capabilities are very limited. Only a small limited
* number of events is allowed to coexist.
*/
static struct efi_event efi_events[16];
/*
* Create an event.
*
* This function is used inside U-Boot code to create an event.
*
* For the API function implementing the CreateEvent service see
* efi_create_event_ext.
*
* @type type of the event to create
* @notify_tpl task priority level of the event
* @notify_function notification function of the event
* @notify_context pointer passed to the notification function
* @event created event
* @return status code
*/
efi_status_t efi_create_event(uint32_t type, UINTN notify_tpl,
void (EFIAPI *notify_function) (
struct efi_event *event,
void *context),
void *notify_context, struct efi_event **event)
{
int i;
if (event == NULL)
return EFI_INVALID_PARAMETER;
if ((type & EVT_NOTIFY_SIGNAL) && (type & EVT_NOTIFY_WAIT))
return EFI_INVALID_PARAMETER;
if ((type & (EVT_NOTIFY_SIGNAL|EVT_NOTIFY_WAIT)) &&
notify_function == NULL)
return EFI_INVALID_PARAMETER;
for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
if (efi_events[i].type)
continue;
efi_events[i].type = type;
efi_events[i].notify_tpl = notify_tpl;
efi_events[i].notify_function = notify_function;
efi_events[i].notify_context = notify_context;
/* Disable timers on bootup */
efi_events[i].trigger_next = -1ULL;
efi_events[i].is_queued = false;
efi_events[i].is_signaled = false;
*event = &efi_events[i];
return EFI_SUCCESS;
}
return EFI_OUT_OF_RESOURCES;
}
/*
* Create an event.
*
* This function implements the CreateEvent service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @type type of the event to create
* @notify_tpl task priority level of the event
* @notify_function notification function of the event
* @notify_context pointer passed to the notification function
* @event created event
* @return status code
*/
static efi_status_t EFIAPI efi_create_event_ext(
uint32_t type, UINTN notify_tpl,
void (EFIAPI *notify_function) (
struct efi_event *event,
void *context),
void *notify_context, struct efi_event **event)
{
EFI_ENTRY("%d, 0x%zx, %p, %p", type, notify_tpl, notify_function,
notify_context);
return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function,
notify_context, event));
}
/*
* Check if a timer event has occurred or a queued notification function should
* be called.
*
* Our timers have to work without interrupts, so we check whenever keyboard
* input or disk accesses happen if enough time elapsed for them to fire.
*/
void efi_timer_check(void)
{
int i;
u64 now = timer_get_us();
for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
if (!efi_events[i].type)
continue;
if (efi_events[i].is_queued)
efi_signal_event(&efi_events[i]);
if (!(efi_events[i].type & EVT_TIMER) ||
now < efi_events[i].trigger_next)
continue;
switch (efi_events[i].trigger_type) {
case EFI_TIMER_RELATIVE:
efi_events[i].trigger_type = EFI_TIMER_STOP;
break;
case EFI_TIMER_PERIODIC:
efi_events[i].trigger_next +=
efi_events[i].trigger_time;
break;
default:
continue;
}
efi_events[i].is_signaled = true;
efi_signal_event(&efi_events[i]);
}
WATCHDOG_RESET();
}
/*
* Set the trigger time for a timer event or stop the event.
*
* This is the function for internal usage in U-Boot. For the API function
* implementing the SetTimer service see efi_set_timer_ext.
*
* @event event for which the timer is set
* @type type of the timer
* @trigger_time trigger period in multiples of 100ns
* @return status code
*/
efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
uint64_t trigger_time)
{
int i;
/*
* The parameter defines a multiple of 100ns.
* We use multiples of 1000ns. So divide by 10.
*/
do_div(trigger_time, 10);
for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
if (event != &efi_events[i])
continue;
if (!(event->type & EVT_TIMER))
break;
switch (type) {
case EFI_TIMER_STOP:
event->trigger_next = -1ULL;
break;
case EFI_TIMER_PERIODIC:
case EFI_TIMER_RELATIVE:
event->trigger_next =
timer_get_us() + trigger_time;
break;
default:
return EFI_INVALID_PARAMETER;
}
event->trigger_type = type;
event->trigger_time = trigger_time;
event->is_signaled = false;
return EFI_SUCCESS;
}
return EFI_INVALID_PARAMETER;
}
/*
* Set the trigger time for a timer event or stop the event.
*
* This function implements the SetTimer service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @event event for which the timer is set
* @type type of the timer
* @trigger_time trigger period in multiples of 100ns
* @return status code
*/
static efi_status_t EFIAPI efi_set_timer_ext(struct efi_event *event,
enum efi_timer_delay type,
uint64_t trigger_time)
{
EFI_ENTRY("%p, %d, %"PRIx64, event, type, trigger_time);
return EFI_EXIT(efi_set_timer(event, type, trigger_time));
}
/*
* Wait for events to be signaled.
*
* This function implements the WaitForEvent service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @num_events number of events to be waited for
* @events events to be waited for
* @index index of the event that was signaled
* @return status code
*/
static efi_status_t EFIAPI efi_wait_for_event(unsigned long num_events,
struct efi_event **event,
size_t *index)
{
int i, j;
EFI_ENTRY("%ld, %p, %p", num_events, event, index);
/* Check parameters */
if (!num_events || !event)
return EFI_EXIT(EFI_INVALID_PARAMETER);
/* Check TPL */
if (efi_tpl != TPL_APPLICATION)
return EFI_EXIT(EFI_UNSUPPORTED);
for (i = 0; i < num_events; ++i) {
for (j = 0; j < ARRAY_SIZE(efi_events); ++j) {
if (event[i] == &efi_events[j])
goto known_event;
}
return EFI_EXIT(EFI_INVALID_PARAMETER);
known_event:
if (!event[i]->type || event[i]->type & EVT_NOTIFY_SIGNAL)
return EFI_EXIT(EFI_INVALID_PARAMETER);
if (!event[i]->is_signaled)
efi_signal_event(event[i]);
}
/* Wait for signal */
for (;;) {
for (i = 0; i < num_events; ++i) {
if (event[i]->is_signaled)
goto out;
}
/* Allow events to occur. */
efi_timer_check();
}
out:
/*
* Reset the signal which is passed to the caller to allow periodic
* events to occur.
*/
event[i]->is_signaled = false;
if (index)
*index = i;
return EFI_EXIT(EFI_SUCCESS);
}
/*
* Signal an EFI event.
*
* This function implements the SignalEvent service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* This functions sets the signaled state of the event and queues the
* notification function for execution.
*
* @event event to signal
* @return status code
*/
static efi_status_t EFIAPI efi_signal_event_ext(struct efi_event *event)
{
int i;
EFI_ENTRY("%p", event);
for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
if (event != &efi_events[i])
continue;
if (event->is_signaled)
break;
event->is_signaled = true;
if (event->type & EVT_NOTIFY_SIGNAL)
efi_signal_event(event);
break;
}
return EFI_EXIT(EFI_SUCCESS);
}
/*
* Close an EFI event.
*
* This function implements the CloseEvent service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @event event to close
* @return status code
*/
static efi_status_t EFIAPI efi_close_event(struct efi_event *event)
{
int i;
EFI_ENTRY("%p", event);
for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
if (event == &efi_events[i]) {
event->type = 0;
event->trigger_next = -1ULL;
event->is_queued = false;
event->is_signaled = false;
return EFI_EXIT(EFI_SUCCESS);
}
}
return EFI_EXIT(EFI_INVALID_PARAMETER);
}
/*
* Check if an event is signaled.
*
* This function implements the CheckEvent service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* If an event is not signaled yet the notification function is queued.
*
* @event event to check
* @return status code
*/
static efi_status_t EFIAPI efi_check_event(struct efi_event *event)
{
int i;
EFI_ENTRY("%p", event);
efi_timer_check();
for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
if (event != &efi_events[i])
continue;
if (!event->type || event->type & EVT_NOTIFY_SIGNAL)
break;
if (!event->is_signaled)
efi_signal_event(event);
if (event->is_signaled)
return EFI_EXIT(EFI_SUCCESS);
return EFI_EXIT(EFI_NOT_READY);
}
return EFI_EXIT(EFI_INVALID_PARAMETER);
}
/*
* Install protocol interface.
*
* This is the function for internal calls. For the API implementation of the
* InstallProtocolInterface service see function
* efi_install_protocol_interface_ext.
*
* @handle handle on which the protocol shall be installed
* @protocol GUID of the protocol to be installed
* @protocol_interface_type type of the interface to be installed,
* always EFI_NATIVE_INTERFACE
* @protocol_interface interface of the protocol implementation
* @return status code
*/
static efi_status_t EFIAPI efi_install_protocol_interface(void **handle,
const efi_guid_t *protocol, int protocol_interface_type,
void *protocol_interface)
{
struct list_head *lhandle;
int i;
efi_status_t r;
if (!handle || !protocol ||
protocol_interface_type != EFI_NATIVE_INTERFACE) {
r = EFI_INVALID_PARAMETER;
goto out;
}
/* Create new handle if requested. */
if (!*handle) {
r = efi_create_handle(handle);
if (r != EFI_SUCCESS)
goto out;
}
/* Find object. */
list_for_each(lhandle, &efi_obj_list) {
struct efi_object *efiobj;
efiobj = list_entry(lhandle, struct efi_object, link);
if (efiobj->handle != *handle)
continue;
/* Check if protocol is already installed on the handle. */
for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
struct efi_handler *handler = &efiobj->protocols[i];
if (!handler->guid)
continue;
if (!guidcmp(handler->guid, protocol)) {
r = EFI_INVALID_PARAMETER;
goto out;
}
}
/* Install protocol in first empty slot. */
for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
struct efi_handler *handler = &efiobj->protocols[i];
if (handler->guid)
continue;
handler->guid = protocol;
handler->protocol_interface = protocol_interface;
r = EFI_SUCCESS;
goto out;
}
r = EFI_OUT_OF_RESOURCES;
goto out;
}
r = EFI_INVALID_PARAMETER;
out:
return r;
}
/*
* Install protocol interface.
*
* This function implements the InstallProtocolInterface service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @handle handle on which the protocol shall be installed
* @protocol GUID of the protocol to be installed
* @protocol_interface_type type of the interface to be installed,
* always EFI_NATIVE_INTERFACE
* @protocol_interface interface of the protocol implementation
* @return status code
*/
static efi_status_t EFIAPI efi_install_protocol_interface_ext(void **handle,
const efi_guid_t *protocol, int protocol_interface_type,
void *protocol_interface)
{
EFI_ENTRY("%p, %pUl, %d, %p", handle, protocol, protocol_interface_type,
protocol_interface);
return EFI_EXIT(efi_install_protocol_interface(handle, protocol,
protocol_interface_type,
protocol_interface));
}
/*
* Reinstall protocol interface.
*
* This function implements the ReinstallProtocolInterface service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @handle handle on which the protocol shall be
* reinstalled
* @protocol GUID of the protocol to be installed
* @old_interface interface to be removed
* @new_interface interface to be installed
* @return status code
*/
static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
const efi_guid_t *protocol, void *old_interface,
void *new_interface)
{
EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, old_interface,
new_interface);
return EFI_EXIT(EFI_ACCESS_DENIED);
}
/*
* Uninstall protocol interface.
*
* This is the function for internal calls. For the API implementation of the
* UninstallProtocolInterface service see function
* efi_uninstall_protocol_interface_ext.
*
* @handle handle from which the protocol shall be removed
* @protocol GUID of the protocol to be removed
* @protocol_interface interface to be removed
* @return status code
*/
static efi_status_t EFIAPI efi_uninstall_protocol_interface(void *handle,
const efi_guid_t *protocol, void *protocol_interface)
{
struct list_head *lhandle;
int i;
efi_status_t r = EFI_NOT_FOUND;
if (!handle || !protocol) {
r = EFI_INVALID_PARAMETER;
goto out;
}
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)
continue;
if (!guidcmp(hprotocol, protocol)) {
if (handler->protocol_interface) {
r = EFI_ACCESS_DENIED;
} else {
handler->guid = 0;
r = EFI_SUCCESS;
}
goto out;
}
}
}
out:
return r;
}
/*
* Uninstall protocol interface.
*
* This function implements the UninstallProtocolInterface service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @handle handle from which the protocol shall be removed
* @protocol GUID of the protocol to be removed
* @protocol_interface interface to be removed
* @return status code
*/
static efi_status_t EFIAPI efi_uninstall_protocol_interface_ext(void *handle,
const efi_guid_t *protocol, void *protocol_interface)
{
EFI_ENTRY("%p, %pUl, %p", handle, protocol, protocol_interface);
return EFI_EXIT(efi_uninstall_protocol_interface(handle, protocol,
protocol_interface));
}
/*
* Register an event for notification when a protocol is installed.
*
* This function implements the RegisterProtocolNotify service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @protocol GUID of the protocol whose installation shall be
* notified
* @event event to be signaled upon installation of the protocol
* @registration key for retrieving the registration information
* @return status code
*/
static efi_status_t EFIAPI efi_register_protocol_notify(
const efi_guid_t *protocol,
struct efi_event *event,
void **registration)
{
EFI_ENTRY("%pUl, %p, %p", protocol, event, registration);
return EFI_EXIT(EFI_OUT_OF_RESOURCES);
}
/*
* Determine if an EFI handle implements a protocol.
*
* See the documentation of the LocateHandle service in the UEFI specification.
*
* @search_type selection criterion
* @protocol GUID of the protocol
* @search_key registration key
* @efiobj handle
* @return 0 if the handle implements the protocol
*/
static int efi_search(enum efi_locate_search_type search_type,
const 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 && !guidcmp(guid, protocol))
return 0;
}
return -1;
}
return -1;
}
/*
* Locate handles implementing a protocol.
*
* This function is meant for U-Boot internal calls. For the API implementation
* of the LocateHandle service see efi_locate_handle_ext.
*
* @search_type selection criterion
* @protocol GUID of the protocol
* @search_key registration key
* @buffer_size size of the buffer to receive the handles in bytes
* @buffer buffer to receive the relevant handles
* @return status code
*/
static efi_status_t efi_locate_handle(
enum efi_locate_search_type search_type,
const efi_guid_t *protocol, void *search_key,
unsigned long *buffer_size, efi_handle_t *buffer)
{
struct list_head *lhandle;
unsigned long size = 0;
/* 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_BUFFER_TOO_SMALL;
}
*buffer_size = size;
if (size == 0)
return EFI_NOT_FOUND;
/* 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;
}
}
return EFI_SUCCESS;
}
/*
* Locate handles implementing a protocol.
*
* This function implements the LocateHandle service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @search_type selection criterion
* @protocol GUID of the protocol
* @search_key registration key
* @buffer_size size of the buffer to receive the handles in bytes
* @buffer buffer to receive the relevant handles
* @return 0 if the handle implements the protocol
*/
static efi_status_t EFIAPI efi_locate_handle_ext(
enum efi_locate_search_type search_type,
const efi_guid_t *protocol, void *search_key,
unsigned long *buffer_size, efi_handle_t *buffer)
{
EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type, protocol, search_key,
buffer_size, buffer);
return EFI_EXIT(efi_locate_handle(search_type, protocol, search_key,
buffer_size, buffer));
}
/*
* Get the device path and handle of an device implementing a protocol.
*
* This function implements the LocateDevicePath service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @protocol GUID of the protocol
* @device_path device path
* @device handle of the device
* @return status code
*/
static efi_status_t EFIAPI efi_locate_device_path(
const efi_guid_t *protocol,
struct efi_device_path **device_path,
efi_handle_t *device)
{
struct efi_object *efiobj;
EFI_ENTRY("%pUl, %p, %p", protocol, device_path, device);
efiobj = efi_dp_find_obj(*device_path, device_path);
if (!efiobj)
return EFI_EXIT(EFI_NOT_FOUND);
*device = efiobj->handle;
return EFI_EXIT(EFI_SUCCESS);
}
/* Collapses configuration table entries, removing index i */
static void efi_remove_configuration_table(int i)
{
struct efi_configuration_table *this = &efi_conf_table[i];
struct efi_configuration_table *next = &efi_conf_table[i+1];
struct efi_configuration_table *end = &efi_conf_table[systab.nr_tables];
memmove(this, next, (ulong)end - (ulong)next);
systab.nr_tables--;
}
/*
* Adds, updates, or removes a configuration table.
*
* This function is used for internal calls. For the API implementation of the
* InstallConfigurationTable service see efi_install_configuration_table_ext.
*
* @guid GUID of the installed table
* @table table to be installed
* @return status code
*/
efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table)
{
int i;
/* Check for guid override */
for (i = 0; i < systab.nr_tables; i++) {
if (!guidcmp(guid, &efi_conf_table[i].guid)) {
if (table)
efi_conf_table[i].table = table;
else
efi_remove_configuration_table(i);
return EFI_SUCCESS;
}
}
if (!table)
return EFI_NOT_FOUND;
/* No override, check for overflow */
if (i >= ARRAY_SIZE(efi_conf_table))
return EFI_OUT_OF_RESOURCES;
/* Add a new entry */
memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid));
efi_conf_table[i].table = table;
systab.nr_tables = i + 1;
return EFI_SUCCESS;
}
/*
* Adds, updates, or removes a configuration table.
*
* This function implements the InstallConfigurationTable service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @guid GUID of the installed table
* @table table to be installed
* @return status code
*/
static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid,
void *table)
{
EFI_ENTRY("%pUl, %p", guid, table);
return EFI_EXIT(efi_install_configuration_table(guid, table));
}
/*
* Initialize a loaded_image_info + loaded_image_info object with correct
* protocols, boot-device, etc.
*
* @info loaded image info to be passed to the entry point of the
* image
* @obj internal object associated with the loaded image
* @device_path device path of the loaded image
* @file_path file path of the loaded image
*/
void efi_setup_loaded_image(struct efi_loaded_image *info, struct efi_object *obj,
struct efi_device_path *device_path,
struct efi_device_path *file_path)
{
obj->handle = info;
/*
* When asking for the device path interface, return
* bootefi_device_path
*/
obj->protocols[0].guid = &efi_guid_device_path;
obj->protocols[0].protocol_interface = device_path;
/*
* When asking for the loaded_image interface, just
* return handle which points to loaded_image_info
*/
obj->protocols[1].guid = &efi_guid_loaded_image;
obj->protocols[1].protocol_interface = info;
obj->protocols[2].guid = &efi_guid_console_control;
obj->protocols[2].protocol_interface = (void *)&efi_console_control;
obj->protocols[3].guid = &efi_guid_device_path_to_text_protocol;
obj->protocols[3].protocol_interface =
(void *)&efi_device_path_to_text;
info->file_path = file_path;
if (device_path)
info->device_handle = efi_dp_find_obj(device_path, NULL);
list_add_tail(&obj->link, &efi_obj_list);
}
/*
* Load an image using a file path.
*
* @file_path the path of the image to load
* @buffer buffer containing the loaded image
* @return status code
*/
efi_status_t efi_load_image_from_path(struct efi_device_path *file_path,
void **buffer)
{
struct efi_file_info *info = NULL;
struct efi_file_handle *f;
static efi_status_t ret;
uint64_t bs;
f = efi_file_from_path(file_path);
if (!f)
return EFI_DEVICE_ERROR;
bs = 0;
EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid,
&bs, info));
if (ret == EFI_BUFFER_TOO_SMALL) {
info = malloc(bs);
EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid,
&bs, info));
}
if (ret != EFI_SUCCESS)
goto error;
ret = efi_allocate_pool(EFI_LOADER_DATA, info->file_size, buffer);
if (ret)
goto error;
EFI_CALL(ret = f->read(f, &info->file_size, *buffer));
error:
free(info);
EFI_CALL(f->close(f));
if (ret != EFI_SUCCESS) {
efi_free_pool(*buffer);
*buffer = NULL;
}
return ret;
}
/*
* Load an EFI image into memory.
*
* This function implements the LoadImage service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @boot_policy true for request originating from the boot manager
* @parent_image the calles's image handle
* @file_path the path of the image to load
* @source_buffer memory location from which the image is installed
* @source_size size of the memory area from which the image is
* installed
* @image_handle handle for the newly installed image
* @return status code
*/
static efi_status_t EFIAPI 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)
{
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 = calloc(1, sizeof(*info));
obj = calloc(1, sizeof(*obj));
if (!source_buffer) {
struct efi_device_path *dp, *fp;
efi_status_t ret;
ret = efi_load_image_from_path(file_path, &source_buffer);
if (ret != EFI_SUCCESS) {
free(info);
free(obj);
return EFI_EXIT(ret);
}
/*
* split file_path which contains both the device and
* file parts:
*/
efi_dp_split_file_path(file_path, &dp, &fp);
efi_setup_loaded_image(info, obj, dp, fp);
} else {
/* In this case, file_path is the "device" path, ie.
* something like a HARDWARE_DEVICE:MEMORY_MAPPED
*/
efi_setup_loaded_image(info, obj, file_path, NULL);
}
info->reserved = efi_load_pe(source_buffer, info);
if (!info->reserved) {
free(info);
free(obj);
return EFI_EXIT(EFI_UNSUPPORTED);
}
*image_handle = info;
return EFI_EXIT(EFI_SUCCESS);
}
/*
* Call the entry point of an image.
*
* This function implements the StartImage service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @image_handle handle of the image
* @exit_data_size size of the buffer
* @exit_data buffer to receive the exit data of the called image
* @return status code
*/
static efi_status_t EFIAPI 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;
efi_is_direct_boot = false;
/* call the image! */
if (setjmp(&info->exit_jmp)) {
/* We returned from the child image */
return EFI_EXIT(info->exit_status);
}
__efi_nesting_dec();
__efi_exit_check();
entry(image_handle, &systab);
__efi_entry_check();
__efi_nesting_inc();
/* Should usually never get here */
return EFI_EXIT(EFI_SUCCESS);
}
/*
* Leave an EFI application or driver.
*
* This function implements the Exit service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @image_handle handle of the application or driver that is exiting
* @exit_status status code
* @exit_data_size size of the buffer in bytes
* @exit_data buffer with data describing an error
* @return status code
*/
static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle,
efi_status_t exit_status, unsigned long exit_data_size,
int16_t *exit_data)
{
struct efi_loaded_image *loaded_image_info = (void*)image_handle;
EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status,
exit_data_size, exit_data);
/* Make sure entry/exit counts for EFI world cross-overs match */
__efi_exit_check();
/*
* But longjmp out with the U-Boot gd, not the application's, as
* the other end is a setjmp call inside EFI context.
*/
efi_restore_gd();
loaded_image_info->exit_status = exit_status;
longjmp(&loaded_image_info->exit_jmp, 1);
panic("EFI application exited");
}
/*
* Find the internal EFI object for a handle.
*
* @handle handle to find
* @return EFI object
*/
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;
}
/*
* Unload an EFI image.
*
* This function implements the UnloadImage service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @image_handle handle of the image to be unloaded
* @return status code
*/
static efi_status_t EFIAPI 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);
}
/*
* Fix up caches for EFI payloads if necessary.
*/
static void efi_exit_caches(void)
{
#if defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
/*
* Grub on 32bit ARM needs to have caches disabled before jumping into
* a zImage, but does not know of all cache layers. Give it a hand.
*/
if (efi_is_direct_boot)
cleanup_before_linux();
#endif
}
/*
* Stop boot services.
*
* This function implements the ExitBootServices service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @image_handle handle of the loaded image
* @map_key key of the memory map
* @return status code
*/
static efi_status_t EFIAPI efi_exit_boot_services(void *image_handle,
unsigned long map_key)
{
int i;
EFI_ENTRY("%p, %ld", image_handle, map_key);
/* Notify that ExitBootServices is invoked. */
for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
if (efi_events[i].type != EVT_SIGNAL_EXIT_BOOT_SERVICES)
continue;
efi_signal_event(&efi_events[i]);
}
/* Make sure that notification functions are not called anymore */
efi_tpl = TPL_HIGH_LEVEL;
/* XXX Should persist EFI variables here */
board_quiesce_devices();
/* Fix up caches for EFI payloads if necessary */
efi_exit_caches();
/* This stops all lingering devices */
bootm_disable_interrupts();
/* Give the payload some time to boot */
WATCHDOG_RESET();
return EFI_EXIT(EFI_SUCCESS);
}
/*
* Get next value of the counter.
*
* This function implements the NextMonotonicCount service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @count returned value of the counter
* @return status code
*/
static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
{
static uint64_t mono = 0;
EFI_ENTRY("%p", count);
*count = mono++;
return EFI_EXIT(EFI_SUCCESS);
}
/*
* Sleep.
*
* This function implements the Stall sercive.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @microseconds period to sleep in microseconds
* @return status code
*/
static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
{
EFI_ENTRY("%ld", microseconds);
udelay(microseconds);
return EFI_EXIT(EFI_SUCCESS);
}
/*
* Reset the watchdog timer.
*
* This function implements the WatchdogTimer service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @timeout seconds before reset by watchdog
* @watchdog_code code to be logged when resetting
* @data_size size of buffer in bytes
* @watchdog_data buffer with data describing the reset reason
* @return status code
*/
static efi_status_t EFIAPI 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_unsupported(__func__);
}
/*
* Connect a controller to a driver.
*
* This function implements the ConnectController service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @controller_handle handle of the controller
* @driver_image_handle handle of the driver
* @remain_device_path device path of a child controller
* @recursive true to connect all child controllers
* @return status code
*/
static efi_status_t EFIAPI 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_NOT_FOUND);
}
/*
* Disconnect a controller from a driver.
*
* This function implements the DisconnectController service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @controller_handle handle of the controller
* @driver_image_handle handle of the driver
* @child_handle handle of the child to destroy
* @return status code
*/
static efi_status_t EFIAPI 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_INVALID_PARAMETER);
}
/*
* Close a protocol.
*
* This function implements the CloseProtocol service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @handle handle on which the protocol shall be closed
* @protocol GUID of the protocol to close
* @agent_handle handle of the driver
* @controller_handle handle of the controller
* @return status code
*/
static efi_status_t EFIAPI efi_close_protocol(void *handle,
const efi_guid_t *protocol,
void *agent_handle,
void *controller_handle)
{
EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, agent_handle,
controller_handle);
return EFI_EXIT(EFI_NOT_FOUND);
}
/*
* Provide information about then open status of a protocol on a handle
*
* This function implements the OpenProtocolInformation service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @handle handle for which the information shall be retrieved
* @protocol GUID of the protocol
* @entry_buffer buffer to receive the open protocol information
* @entry_count number of entries available in the buffer
* @return status code
*/
static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle,
const efi_guid_t *protocol,
struct efi_open_protocol_info_entry **entry_buffer,
unsigned long *entry_count)
{
EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, entry_buffer,
entry_count);
return EFI_EXIT(EFI_NOT_FOUND);
}
/*
* Get protocols installed on a handle.
*
* This function implements the ProtocolsPerHandleService.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @handle handle for which the information is retrieved
* @protocol_buffer buffer with protocol GUIDs
* @protocol_buffer_count number of entries in the buffer
* @return status code
*/
static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
efi_guid_t ***protocol_buffer,
unsigned long *protocol_buffer_count)
{
unsigned long buffer_size;
struct efi_object *efiobj;
unsigned long i, j;
struct list_head *lhandle;
efi_status_t r;
EFI_ENTRY("%p, %p, %p", handle, protocol_buffer,
protocol_buffer_count);
if (!handle || !protocol_buffer || !protocol_buffer_count)
return EFI_EXIT(EFI_INVALID_PARAMETER);
*protocol_buffer = NULL;
*protocol_buffer_count = 0;
list_for_each(lhandle, &efi_obj_list) {
efiobj = list_entry(lhandle, struct efi_object, link);
if (efiobj->handle != handle)
continue;
/* Count protocols */
for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
if (efiobj->protocols[i].guid)
++*protocol_buffer_count;
}
/* Copy guids */
if (*protocol_buffer_count) {
buffer_size = sizeof(efi_guid_t *) *
*protocol_buffer_count;
r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
buffer_size,
(void **)protocol_buffer);
if (r != EFI_SUCCESS)
return EFI_EXIT(r);
j = 0;
for (i = 0; i < ARRAY_SIZE(efiobj->protocols); ++i) {
if (efiobj->protocols[i].guid) {
(*protocol_buffer)[j] = (void *)
efiobj->protocols[i].guid;
++j;
}
}
}
break;
}
return EFI_EXIT(EFI_SUCCESS);
}
/*
* Locate handles implementing a protocol.
*
* This function implements the LocateHandleBuffer service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @search_type selection criterion
* @protocol GUID of the protocol
* @search_key registration key
* @no_handles number of returned handles
* @buffer buffer with the returned handles
* @return status code
*/
static efi_status_t EFIAPI efi_locate_handle_buffer(
enum efi_locate_search_type search_type,
const efi_guid_t *protocol, void *search_key,
unsigned long *no_handles, efi_handle_t **buffer)
{
efi_status_t r;
unsigned long buffer_size = 0;
EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type, protocol, search_key,
no_handles, buffer);
if (!no_handles || !buffer) {
r = EFI_INVALID_PARAMETER;
goto out;
}
*no_handles = 0;
*buffer = NULL;
r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
*buffer);
if (r != EFI_BUFFER_TOO_SMALL)
goto out;
r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size,
(void **)buffer);
if (r != EFI_SUCCESS)
goto out;
r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
*buffer);
if (r == EFI_SUCCESS)
*no_handles = buffer_size / sizeof(void *);
out:
return EFI_EXIT(r);
}
/*
* Find an interface implementing a protocol.
*
* This function implements the LocateProtocol service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @protocol GUID of the protocol
* @registration registration key passed to the notification function
* @protocol_interface interface implementing the protocol
* @return status code
*/
static efi_status_t EFIAPI efi_locate_protocol(const efi_guid_t *protocol,
void *registration,
void **protocol_interface)
{
struct list_head *lhandle;
int i;
EFI_ENTRY("%pUl, %p, %p", protocol, registration, protocol_interface);
if (!protocol || !protocol_interface)
return EFI_EXIT(EFI_INVALID_PARAMETER);
EFI_PRINT_GUID("protocol", protocol);
list_for_each(lhandle, &efi_obj_list) {
struct efi_object *efiobj;
efiobj = list_entry(lhandle, struct efi_object, link);
for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
struct efi_handler *handler = &efiobj->protocols[i];
if (!handler->guid)
continue;
if (!guidcmp(handler->guid, protocol)) {
*protocol_interface =
handler->protocol_interface;
return EFI_EXIT(EFI_SUCCESS);
}
}
}
*protocol_interface = NULL;
return EFI_EXIT(EFI_NOT_FOUND);
}
/*
* Install multiple protocol interfaces.
*
* This function implements the MultipleProtocolInterfaces service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @handle handle on which the protocol interfaces shall be installed
* @... NULL terminated argument list with pairs of protocol GUIDS and
* interfaces
* @return status code
*/
static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces(
void **handle, ...)
{
EFI_ENTRY("%p", handle);
va_list argptr;
const efi_guid_t *protocol;
void *protocol_interface;
efi_status_t r = EFI_SUCCESS;
int i = 0;
if (!handle)
return EFI_EXIT(EFI_INVALID_PARAMETER);
va_start(argptr, handle);
for (;;) {
protocol = va_arg(argptr, efi_guid_t*);
if (!protocol)
break;
protocol_interface = va_arg(argptr, void*);
r = efi_install_protocol_interface(handle, protocol,
EFI_NATIVE_INTERFACE,
protocol_interface);
if (r != EFI_SUCCESS)
break;
i++;
}
va_end(argptr);
if (r == EFI_SUCCESS)
return EFI_EXIT(r);
/* If an error occured undo all changes. */
va_start(argptr, handle);
for (; i; --i) {
protocol = va_arg(argptr, efi_guid_t*);
protocol_interface = va_arg(argptr, void*);
efi_uninstall_protocol_interface(handle, protocol,
protocol_interface);
}
va_end(argptr);
return EFI_EXIT(r);
}
/*
* Uninstall multiple protocol interfaces.
*
* This function implements the UninstallMultipleProtocolInterfaces service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @handle handle from which the protocol interfaces shall be removed
* @... NULL terminated argument list with pairs of protocol GUIDS and
* interfaces
* @return status code
*/
static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
void *handle, ...)
{
EFI_ENTRY("%p", handle);
return EFI_EXIT(EFI_INVALID_PARAMETER);
}
/*
* Calculate cyclic redundancy code.
*
* This function implements the CalculateCrc32 service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @data buffer with data
* @data_size size of buffer in bytes
* @crc32_p cyclic redundancy code
* @return status code
*/
static efi_status_t EFIAPI 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);
}
/*
* Copy memory.
*
* This function implements the CopyMem service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @destination destination of the copy operation
* @source source of the copy operation
* @length number of bytes to copy
*/
static void EFIAPI efi_copy_mem(void *destination, const void *source,
size_t length)
{
EFI_ENTRY("%p, %p, %ld", destination, source, (unsigned long)length);
memcpy(destination, source, length);
EFI_EXIT(EFI_SUCCESS);
}
/*
* Fill memory with a byte value.
*
* This function implements the SetMem service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @buffer buffer to fill
* @size size of buffer in bytes
* @value byte to copy to the buffer
*/
static void EFIAPI efi_set_mem(void *buffer, size_t size, uint8_t value)
{
EFI_ENTRY("%p, %ld, 0x%x", buffer, (unsigned long)size, value);
memset(buffer, value, size);
EFI_EXIT(EFI_SUCCESS);
}
/*
* Open protocol interface on a handle.
*
* This function implements the OpenProtocol interface.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @handle handle on which the protocol shall be opened
* @protocol GUID of the protocol
* @protocol_interface interface implementing the protocol
* @agent_handle handle of the driver
* @controller_handle handle of the controller
* @attributes attributes indicating how to open the protocol
* @return status code
*/
static efi_status_t EFIAPI efi_open_protocol(
void *handle, const 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_INVALID_PARAMETER;
EFI_ENTRY("%p, %pUl, %p, %p, %p, 0x%x", handle, protocol,
protocol_interface, agent_handle, controller_handle,
attributes);
if (!handle || !protocol ||
(!protocol_interface && attributes !=
EFI_OPEN_PROTOCOL_TEST_PROTOCOL)) {
goto out;
}
EFI_PRINT_GUID("protocol", protocol);
switch (attributes) {
case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL:
case EFI_OPEN_PROTOCOL_GET_PROTOCOL:
case EFI_OPEN_PROTOCOL_TEST_PROTOCOL:
break;
case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER:
if (controller_handle == handle)
goto out;
case EFI_OPEN_PROTOCOL_BY_DRIVER:
case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE:
if (controller_handle == NULL)
goto out;
case EFI_OPEN_PROTOCOL_EXCLUSIVE:
if (agent_handle == NULL)
goto out;
break;
default:
goto out;
}
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)
continue;
if (!guidcmp(hprotocol, protocol)) {
if (attributes !=
EFI_OPEN_PROTOCOL_TEST_PROTOCOL) {
*protocol_interface =
handler->protocol_interface;
}
r = EFI_SUCCESS;
goto out;
}
}
goto unsupported;
}
unsupported:
r = EFI_UNSUPPORTED;
out:
return EFI_EXIT(r);
}
/*
* Get interface of a protocol on a handle.
*
* This function implements the HandleProtocol service.
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
* @handle handle on which the protocol shall be opened
* @protocol GUID of the protocol
* @protocol_interface interface implementing the protocol
* @return status code
*/
static efi_status_t EFIAPI efi_handle_protocol(void *handle,
const efi_guid_t *protocol,
void **protocol_interface)
{
return efi_open_protocol(handle, protocol, protocol_interface, NULL,
NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL);
}
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_ext,
.free_pages = efi_free_pages_ext,
.get_memory_map = efi_get_memory_map_ext,
.allocate_pool = efi_allocate_pool_ext,
.free_pool = efi_free_pool_ext,
.create_event = efi_create_event_ext,
.set_timer = efi_set_timer_ext,
.wait_for_event = efi_wait_for_event,
.signal_event = efi_signal_event_ext,
.close_event = efi_close_event,
.check_event = efi_check_event,
.install_protocol_interface = efi_install_protocol_interface_ext,
.reinstall_protocol_interface = efi_reinstall_protocol_interface,
.uninstall_protocol_interface = efi_uninstall_protocol_interface_ext,
.handle_protocol = efi_handle_protocol,
.reserved = NULL,
.register_protocol_notify = efi_register_protocol_notify,
.locate_handle = efi_locate_handle_ext,
.locate_device_path = efi_locate_device_path,
.install_configuration_table = efi_install_configuration_table_ext,
.load_image = efi_load_image,
.start_image = efi_start_image,
.exit = 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 __efi_runtime_data firmware_vendor[] =
{ 'D','a','s',' ','U','-','b','o','o','t',0 };
struct efi_system_table __efi_runtime_data systab = {
.hdr = {
.signature = EFI_SYSTEM_TABLE_SIGNATURE,
.revision = 0x20005, /* 2.5 */
.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 = 0,
.tables = (void*)efi_conf_table,
};