Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-11 07:34:31 +00:00
Code Issues Projects Releases Packages Wiki Activity

efi_loader: split off detaching SetVirtualAddress()

Browse source 
The runtime services SetVirtualAddress() and ConvertPointer() become
unavailable after SetVirtualAddress(). Other runtime services become
unavailable after ExitBootServices.

Move the update of SetVirtualAddress() and ConvertPointer() to
efi_relocate_runtime_table().

Use functions with the correct signature when detaching.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2019-06-29 03:32:52 +02:00
parent 1bb52fc2d2
commit ee8ebaaaae
1 changed files with 58 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

69
lib/efi_loader/efi_runtime.c
View file

@ -395,10 +395,6 @@ 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,
@ -439,6 +435,50 @@ static __efi_runtime void efi_runtime_detach(void)
}
}
/**
* 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_status_t EFIAPI efi_set_virtual_address_map_runtime(
unsigned long memory_map_size,
unsigned long descriptor_size,
uint32_t descriptor_version,
struct efi_mem_desc *virtmap)
{
return EFI_UNSUPPORTED;
}
/**
* 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 __efi_runtime void efi_relocate_runtime_table(ulong offset)
{
ulong patchoff;
@ -448,16 +488,23 @@ static __efi_runtime void efi_relocate_runtime_table(ulong offset)
patchoff = offset - gd->relocaddr;
for (pos = (void **)&efi_runtime_services.get_time;
pos <= (void **)&efi_runtime_services.query_variable_info; ++pos) {
/*
* The UEFI spec requires not to update VirtualAddressMap()
* and ConvertPointer().
*/
if (*pos && pos !=
(void **)&efi_runtime_services.set_virtual_address_map &&
pos != (void **)&efi_runtime_services.convert_pointer)
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;
/* Update CRC32 */
efi_update_table_header_crc32(&efi_runtime_services.hdr);
}