#include <common.h>
#include <command.h>
+#include <cpu_func.h>
#include <dm.h>
#include <elf.h>
#include <efi_loader.h>
+#include <malloc.h>
#include <rtc.h>
+#include <u-boot/crc.h>
/* For manual relocation support */
DECLARE_GLOBAL_DATA_PTR;
+/* GUID of the runtime properties table */
+static const efi_guid_t efi_rt_properties_table_guid =
+ EFI_RT_PROPERTIES_TABLE_GUID;
+
struct efi_runtime_mmio_list {
struct list_head link;
void **ptr;
LIST_HEAD(efi_runtime_mmio);
static efi_status_t __efi_runtime EFIAPI efi_unimplemented(void);
-static efi_status_t __efi_runtime EFIAPI efi_device_error(void);
-static efi_status_t __efi_runtime EFIAPI efi_invalid_parameter(void);
/*
* TODO(sjg@chromium.org): These defines and structures should come from the ELF
long addend;
};
+static __efi_runtime_data struct efi_mem_desc *efi_virtmap;
+static __efi_runtime_data efi_uintn_t efi_descriptor_count;
+static __efi_runtime_data efi_uintn_t efi_descriptor_size;
+
/*
* EFI runtime code lives in two stages. In the first stage, U-Boot and an EFI
* payload are running concurrently at the same time. In this mode, we can
* handle a good number of runtime callbacks
*/
+/**
+ * efi_init_runtime_supported() - create runtime properties table
+ *
+ * Create a configuration table specifying which services are available at
+ * runtime.
+ *
+ * Return: status code
+ */
+efi_status_t efi_init_runtime_supported(void)
+{
+ efi_status_t ret;
+ struct efi_rt_properties_table *rt_table;
+
+ ret = efi_allocate_pool(EFI_RUNTIME_SERVICES_DATA,
+ sizeof(struct efi_rt_properties_table),
+ (void **)&rt_table);
+ if (ret != EFI_SUCCESS)
+ return ret;
+
+ rt_table->version = EFI_RT_PROPERTIES_TABLE_VERSION;
+ rt_table->length = sizeof(struct efi_rt_properties_table);
+ rt_table->runtime_services_supported =
+ EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP |
+ EFI_RT_SUPPORTED_CONVERT_POINTER;
+
+ /*
+ * This value must be synced with efi_runtime_detach_list
+ * as well as efi_runtime_services.
+ */
+#ifdef CONFIG_EFI_HAVE_RUNTIME_RESET
+ rt_table->runtime_services_supported |= EFI_RT_SUPPORTED_RESET_SYSTEM;
+#endif
+
+ ret = efi_install_configuration_table(&efi_rt_properties_table_guid,
+ rt_table);
+ return ret;
+}
+
/**
* efi_update_table_header_crc32() - Update crc32 in table header
*
if (evt->group &&
!guidcmp(evt->group,
&efi_guid_event_group_reset_system)) {
- efi_signal_event(evt, false);
+ efi_signal_event(evt);
break;
}
}
struct efi_time *time,
struct efi_time_cap *capabilities)
{
- /* Nothing we can do */
- return EFI_DEVICE_ERROR;
+ return EFI_UNSUPPORTED;
}
/**
return EFI_UNSUPPORTED;
}
-struct efi_runtime_detach_list_struct {
- void *ptr;
- void *patchto;
-};
-
-static const struct efi_runtime_detach_list_struct efi_runtime_detach_list[] = {
- {
- /* do_reset is gone */
- .ptr = &efi_runtime_services.reset_system,
- .patchto = efi_reset_system,
- }, {
- /* invalidate_*cache_all are gone */
- .ptr = &efi_runtime_services.set_virtual_address_map,
- .patchto = &efi_unimplemented,
- }, {
- /* RTC accessors are gone */
- .ptr = &efi_runtime_services.get_time,
- .patchto = &efi_get_time,
- }, {
- .ptr = &efi_runtime_services.set_time,
- .patchto = &efi_set_time,
- }, {
- /* Clean up system table */
- .ptr = &systab.con_in,
- .patchto = NULL,
- }, {
- /* Clean up system table */
- .ptr = &systab.con_out,
- .patchto = NULL,
- }, {
- /* Clean up system table */
- .ptr = &systab.std_err,
- .patchto = NULL,
- }, {
- /* Clean up system table */
- .ptr = &systab.boottime,
- .patchto = NULL,
- }, {
- .ptr = &efi_runtime_services.get_variable,
- .patchto = &efi_device_error,
- }, {
- .ptr = &efi_runtime_services.get_next_variable_name,
- .patchto = &efi_device_error,
- }, {
- .ptr = &efi_runtime_services.set_variable,
- .patchto = &efi_device_error,
- }
-};
+/**
+ * efi_is_runtime_service_pointer() - check if pointer points to runtime table
+ *
+ * @p: pointer to check
+ * Return: true if the pointer points to a service function pointer in the
+ * runtime table
+ */
+static bool efi_is_runtime_service_pointer(void *p)
+{
+ return (p >= (void *)&efi_runtime_services.get_time &&
+ p <= (void *)&efi_runtime_services.query_variable_info) ||
+ p == (void *)&efi_events.prev ||
+ p == (void *)&efi_events.next;
+}
-static bool efi_runtime_tobedetached(void *p)
+/**
+ * efi_runtime_detach() - detach unimplemented runtime functions
+ */
+void efi_runtime_detach(void)
{
- int i;
+ efi_runtime_services.reset_system = efi_reset_system;
+ efi_runtime_services.get_time = efi_get_time;
+ efi_runtime_services.set_time = efi_set_time;
+
+ /* Update CRC32 */
+ efi_update_table_header_crc32(&efi_runtime_services.hdr);
+}
- for (i = 0; i < ARRAY_SIZE(efi_runtime_detach_list); i++)
- if (efi_runtime_detach_list[i].ptr == p)
- return true;
+/**
+ * efi_set_virtual_address_map_runtime() - change from physical to virtual
+ * mapping
+ *
+ * This function implements the SetVirtualAddressMap() runtime service after
+ * it is first called.
+ *
+ * See the Unified Extensible Firmware Interface (UEFI) specification for
+ * details.
+ *
+ * @memory_map_size: size of the virtual map
+ * @descriptor_size: size of an entry in the map
+ * @descriptor_version: version of the map entries
+ * @virtmap: virtual address mapping information
+ * Return: status code EFI_UNSUPPORTED
+ */
+static __efi_runtime efi_status_t EFIAPI efi_set_virtual_address_map_runtime(
+ efi_uintn_t memory_map_size,
+ efi_uintn_t descriptor_size,
+ uint32_t descriptor_version,
+ struct efi_mem_desc *virtmap)
+{
+ return EFI_UNSUPPORTED;
+}
- return false;
+/**
+ * efi_convert_pointer_runtime() - convert from physical to virtual pointer
+ *
+ * This function implements the ConvertPointer() runtime service after
+ * the first call to SetVirtualAddressMap().
+ *
+ * See the Unified Extensible Firmware Interface (UEFI) specification for
+ * details.
+ *
+ * @debug_disposition: indicates if pointer may be converted to NULL
+ * @address: pointer to be converted
+ * Return: status code EFI_UNSUPPORTED
+ */
+static __efi_runtime efi_status_t EFIAPI efi_convert_pointer_runtime(
+ efi_uintn_t debug_disposition, void **address)
+{
+ return EFI_UNSUPPORTED;
}
-static void efi_runtime_detach(ulong offset)
+/**
+ * efi_convert_pointer() - convert from physical to virtual pointer
+ *
+ * This function implements the ConvertPointer() runtime service until
+ * the first call to SetVirtualAddressMap().
+ *
+ * See the Unified Extensible Firmware Interface (UEFI) specification for
+ * details.
+ *
+ * @debug_disposition: indicates if pointer may be converted to NULL
+ * @address: pointer to be converted
+ * Return: status code
+ */
+static __efi_runtime efi_status_t EFIAPI efi_convert_pointer(
+ efi_uintn_t debug_disposition, void **address)
{
- int i;
- ulong patchoff = offset - (ulong)gd->relocaddr;
+ efi_physical_addr_t addr = (uintptr_t)*address;
+ efi_uintn_t i;
+ efi_status_t ret = EFI_NOT_FOUND;
- for (i = 0; i < ARRAY_SIZE(efi_runtime_detach_list); i++) {
- ulong patchto = (ulong)efi_runtime_detach_list[i].patchto;
- ulong *p = efi_runtime_detach_list[i].ptr;
- ulong newaddr = patchto ? (patchto + patchoff) : 0;
+ EFI_ENTRY("%zu %p", debug_disposition, address);
- debug("%s: Setting %p to %lx\n", __func__, p, newaddr);
- *p = newaddr;
+ if (!efi_virtmap) {
+ ret = EFI_UNSUPPORTED;
+ goto out;
}
+ if (!address) {
+ ret = EFI_INVALID_PARAMETER;
+ goto out;
+ }
+
+ for (i = 0; i < efi_descriptor_count; i++) {
+ struct efi_mem_desc *map = (void *)efi_virtmap +
+ (efi_descriptor_size * i);
+
+ if (addr >= map->physical_start &&
+ (addr < map->physical_start
+ + (map->num_pages << EFI_PAGE_SHIFT))) {
+ *address = (void *)(uintptr_t)
+ (addr + map->virtual_start -
+ map->physical_start);
+
+ ret = EFI_SUCCESS;
+ break;
+ }
+ }
+
+out:
+ return EFI_EXIT(ret);
+}
+
+static __efi_runtime void efi_relocate_runtime_table(ulong offset)
+{
+ ulong patchoff;
+ void **pos;
+
+ /* Relocate the runtime services pointers */
+ patchoff = offset - gd->relocaddr;
+ for (pos = (void **)&efi_runtime_services.get_time;
+ pos <= (void **)&efi_runtime_services.query_variable_info; ++pos) {
+ if (*pos)
+ *pos += patchoff;
+ }
+
+ /*
+ * The entry for SetVirtualAddress() must point to a physical address.
+ * After the first execution the service must return EFI_UNSUPPORTED.
+ */
+ efi_runtime_services.set_virtual_address_map =
+ &efi_set_virtual_address_map_runtime;
+
+ /*
+ * The entry for ConvertPointer() must point to a physical address.
+ * The service is not usable after SetVirtualAddress().
+ */
+ efi_runtime_services.convert_pointer = &efi_convert_pointer_runtime;
+
+ /*
+ * TODO: Update UEFI variable RuntimeServicesSupported removing flags
+ * EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP and
+ * EFI_RT_SUPPORTED_CONVERT_POINTER as required by the UEFI spec 2.8.
+ */
+
/* Update CRC32 */
efi_update_table_header_crc32(&efi_runtime_services.hdr);
}
p = (void*)((ulong)rel->offset - base) + gd->relocaddr;
+ /*
+ * The runtime services table is updated in
+ * efi_relocate_runtime_table()
+ */
+ if (map && efi_is_runtime_service_pointer(p))
+ continue;
+
debug("%s: rel->info=%#lx *p=%#lx rel->offset=%p\n", __func__,
rel->info, *p, rel->offset);
}
#endif
default:
- if (!efi_runtime_tobedetached(p))
- printf("%s: Unknown relocation type %llx\n",
- __func__, rel->info & R_MASK);
+ printf("%s: Unknown relocation type %llx\n",
+ __func__, rel->info & R_MASK);
continue;
}
if (map && ((newaddr < map->virtual_start) ||
newaddr > (map->virtual_start +
(map->num_pages << EFI_PAGE_SHIFT)))) {
- if (!efi_runtime_tobedetached(p))
- printf("%s: Relocation at %p is out of "
- "range (%lx)\n", __func__, p, newaddr);
+ printf("%s: Relocation at %p is out of range (%lx)\n",
+ __func__, p, newaddr);
continue;
}
* Return: status code
*/
static efi_status_t EFIAPI efi_set_virtual_address_map(
- unsigned long memory_map_size,
- unsigned long descriptor_size,
+ efi_uintn_t memory_map_size,
+ efi_uintn_t descriptor_size,
uint32_t descriptor_version,
struct efi_mem_desc *virtmap)
{
- int n = memory_map_size / descriptor_size;
- int i;
+ efi_uintn_t n = memory_map_size / descriptor_size;
+ efi_uintn_t i;
+ efi_status_t ret = EFI_INVALID_PARAMETER;
int rt_code_sections = 0;
+ struct efi_event *event;
- EFI_ENTRY("%lx %lx %x %p", memory_map_size, descriptor_size,
+ EFI_ENTRY("%zx %zx %x %p", memory_map_size, descriptor_size,
descriptor_version, virtmap);
+ if (descriptor_version != EFI_MEMORY_DESCRIPTOR_VERSION ||
+ descriptor_size < sizeof(struct efi_mem_desc))
+ goto out;
+
+ efi_virtmap = virtmap;
+ efi_descriptor_size = descriptor_size;
+ efi_descriptor_count = n;
+
/*
* TODO:
* Further down we are cheating. While really we should implement
* We expose exactly one single runtime code section, so
* something is definitely going wrong.
*/
- return EFI_EXIT(EFI_INVALID_PARAMETER);
+ goto out;
+ }
+
+ /* Notify EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE */
+ list_for_each_entry(event, &efi_events, link) {
+ if (event->notify_function)
+ EFI_CALL_VOID(event->notify_function(
+ event, event->notify_context));
}
/* Rebind mmio pointers */
}
}
- /* Move the actual runtime code over */
+ /* Relocate the runtime. See TODO above */
for (i = 0; i < n; i++) {
struct efi_mem_desc *map;
ulong new_offset = map->virtual_start -
map->physical_start + gd->relocaddr;
+ efi_relocate_runtime_table(new_offset);
efi_runtime_relocate(new_offset, map);
- /* Once we're virtual, we can no longer handle
- complex callbacks */
- efi_runtime_detach(new_offset);
- return EFI_EXIT(EFI_SUCCESS);
+ ret = EFI_SUCCESS;
+ goto out;
}
}
- return EFI_EXIT(EFI_INVALID_PARAMETER);
+out:
+ return EFI_EXIT(ret);
}
/**
efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
{
struct efi_runtime_mmio_list *newmmio;
- u64 pages = (len + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT;
uint64_t addr = *(uintptr_t *)mmio_ptr;
- uint64_t retaddr;
+ efi_status_t ret;
- retaddr = efi_add_memory_map(addr, pages, EFI_MMAP_IO, false);
- if (retaddr != addr)
+ ret = efi_add_memory_map(addr, len, EFI_MMAP_IO);
+ if (ret != EFI_SUCCESS)
return EFI_OUT_OF_RESOURCES;
newmmio = calloc(1, sizeof(*newmmio));
return EFI_UNSUPPORTED;
}
-/**
- * efi_device_error() - replacement function, returns EFI_DEVICE_ERROR
- *
- * This function is used after SetVirtualAddressMap() is called as replacement
- * for services that are not available anymore due to constraints of the U-Boot
- * implementation.
- *
- * Return: EFI_DEVICE_ERROR
- */
-static efi_status_t __efi_runtime EFIAPI efi_device_error(void)
-{
- return EFI_DEVICE_ERROR;
-}
-
-/**
- * efi_invalid_parameter() - replacement function, returns EFI_INVALID_PARAMETER
- *
- * This function is used after SetVirtualAddressMap() is called as replacement
- * for services that are not available anymore due to constraints of the U-Boot
- * implementation.
- *
- * Return: EFI_INVALID_PARAMETER
- */
-static efi_status_t __efi_runtime EFIAPI efi_invalid_parameter(void)
-{
- return EFI_INVALID_PARAMETER;
-}
-
/**
* efi_update_capsule() - process information from operating system
*
return EFI_UNSUPPORTED;
}
-/**
- * efi_query_variable_info() - get information about EFI variables
- *
- * This function implements the QueryVariableInfo() runtime service.
- *
- * See the Unified Extensible Firmware Interface (UEFI) specification for
- * details.
- *
- * @attributes: bitmask to select variables to be
- * queried
- * @maximum_variable_storage_size: maximum size of storage area for the
- * selected variable types
- * @remaining_variable_storage_size: remaining size of storage are for the
- * selected variable types
- * @maximum_variable_size: maximum size of a variable of the
- * selected type
- * Returns: status code
- */
-efi_status_t __efi_runtime EFIAPI efi_query_variable_info(
- u32 attributes,
- u64 *maximum_variable_storage_size,
- u64 *remaining_variable_storage_size,
- u64 *maximum_variable_size)
-{
- return EFI_UNSUPPORTED;
-}
-
struct efi_runtime_services __efi_runtime_data efi_runtime_services = {
.hdr = {
.signature = EFI_RUNTIME_SERVICES_SIGNATURE,
.get_wakeup_time = (void *)&efi_unimplemented,
.set_wakeup_time = (void *)&efi_unimplemented,
.set_virtual_address_map = &efi_set_virtual_address_map,
- .convert_pointer = (void *)&efi_invalid_parameter,
+ .convert_pointer = efi_convert_pointer,
.get_variable = efi_get_variable,
.get_next_variable_name = efi_get_next_variable_name,
.set_variable = efi_set_variable,
- .get_next_high_mono_count = (void *)&efi_device_error,
+ .get_next_high_mono_count = (void *)&efi_unimplemented,
.reset_system = &efi_reset_system_boottime,
.update_capsule = efi_update_capsule,
.query_capsule_caps = efi_query_capsule_caps,
projects / oweals / u-boot.git / blobdiff