mirror of
https://github.com/AsahiLinux/u-boot
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6fc4fc38ac
efi_runtime_mmio is only referenced in efi_boottime.c Signed-off-by: Bin Meng <bmeng@tinylab.org>
959 lines
25 KiB
C
959 lines
25 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* EFI application runtime services
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*
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* Copyright (c) 2016 Alexander Graf
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*/
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#include <common.h>
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#include <command.h>
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#include <cpu_func.h>
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#include <dm.h>
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#include <elf.h>
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#include <efi_loader.h>
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#include <log.h>
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#include <malloc.h>
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#include <rtc.h>
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#include <asm/global_data.h>
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#include <u-boot/crc.h>
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/* For manual relocation support */
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DECLARE_GLOBAL_DATA_PTR;
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/* GUID of the runtime properties table */
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static const efi_guid_t efi_rt_properties_table_guid =
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EFI_RT_PROPERTIES_TABLE_GUID;
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struct efi_runtime_mmio_list {
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struct list_head link;
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void **ptr;
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u64 paddr;
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u64 len;
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};
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/* This list contains all runtime available mmio regions */
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static LIST_HEAD(efi_runtime_mmio);
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static efi_status_t __efi_runtime EFIAPI efi_unimplemented(void);
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/*
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* TODO(sjg@chromium.org): These defines and structures should come from the ELF
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* header for each architecture (or a generic header) rather than being repeated
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* here.
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*/
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#if defined(__aarch64__)
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#define R_RELATIVE R_AARCH64_RELATIVE
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#define R_MASK 0xffffffffULL
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#define IS_RELA 1
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#elif defined(__arm__)
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#define R_RELATIVE R_ARM_RELATIVE
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#define R_MASK 0xffULL
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#elif defined(__i386__)
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#define R_RELATIVE R_386_RELATIVE
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#define R_MASK 0xffULL
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#elif defined(__x86_64__)
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#define R_RELATIVE R_X86_64_RELATIVE
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#define R_MASK 0xffffffffULL
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#define IS_RELA 1
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#elif defined(__riscv)
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#define R_RELATIVE R_RISCV_RELATIVE
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#define R_MASK 0xffULL
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#define IS_RELA 1
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struct dyn_sym {
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ulong foo1;
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ulong addr;
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u32 foo2;
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u32 foo3;
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};
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#if (__riscv_xlen == 32)
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#define R_ABSOLUTE R_RISCV_32
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#define SYM_INDEX 8
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#elif (__riscv_xlen == 64)
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#define R_ABSOLUTE R_RISCV_64
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#define SYM_INDEX 32
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#else
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#error unknown riscv target
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#endif
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#else
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#error Need to add relocation awareness
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#endif
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struct elf_rel {
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ulong *offset;
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ulong info;
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};
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struct elf_rela {
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ulong *offset;
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ulong info;
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long addend;
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};
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static __efi_runtime_data struct efi_mem_desc *efi_virtmap;
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static __efi_runtime_data efi_uintn_t efi_descriptor_count;
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static __efi_runtime_data efi_uintn_t efi_descriptor_size;
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/*
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* EFI runtime code lives in two stages. In the first stage, U-Boot and an EFI
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* payload are running concurrently at the same time. In this mode, we can
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* handle a good number of runtime callbacks
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*/
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/**
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* efi_init_runtime_supported() - create runtime properties table
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*
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* Create a configuration table specifying which services are available at
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* runtime.
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*
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* Return: status code
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*/
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efi_status_t efi_init_runtime_supported(void)
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{
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efi_status_t ret;
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struct efi_rt_properties_table *rt_table;
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ret = efi_allocate_pool(EFI_RUNTIME_SERVICES_DATA,
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sizeof(struct efi_rt_properties_table),
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(void **)&rt_table);
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if (ret != EFI_SUCCESS)
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return ret;
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rt_table->version = EFI_RT_PROPERTIES_TABLE_VERSION;
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rt_table->length = sizeof(struct efi_rt_properties_table);
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rt_table->runtime_services_supported =
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EFI_RT_SUPPORTED_GET_VARIABLE |
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EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME |
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EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP |
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EFI_RT_SUPPORTED_CONVERT_POINTER;
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/*
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* This value must be synced with efi_runtime_detach_list
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* as well as efi_runtime_services.
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*/
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#ifdef CONFIG_EFI_HAVE_RUNTIME_RESET
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rt_table->runtime_services_supported |= EFI_RT_SUPPORTED_RESET_SYSTEM;
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#endif
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ret = efi_install_configuration_table(&efi_rt_properties_table_guid,
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rt_table);
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return ret;
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}
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/**
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* efi_memcpy_runtime() - copy memory area
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*
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* At runtime memcpy() is not available.
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*
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* Overlapping memory areas can be copied safely if src >= dest.
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*
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* @dest: destination buffer
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* @src: source buffer
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* @n: number of bytes to copy
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* Return: pointer to destination buffer
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*/
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void __efi_runtime efi_memcpy_runtime(void *dest, const void *src, size_t n)
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{
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u8 *d = dest;
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const u8 *s = src;
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for (; n; --n)
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*d++ = *s++;
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}
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/**
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* efi_update_table_header_crc32() - Update crc32 in table header
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*
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* @table: EFI table
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*/
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void __efi_runtime efi_update_table_header_crc32(struct efi_table_hdr *table)
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{
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table->crc32 = 0;
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table->crc32 = crc32(0, (const unsigned char *)table,
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table->headersize);
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}
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/**
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* efi_reset_system_boottime() - reset system at boot time
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*
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* This function implements the ResetSystem() runtime service before
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* SetVirtualAddressMap() is called.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification for
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* details.
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*
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* @reset_type: type of reset to perform
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* @reset_status: status code for the reset
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* @data_size: size of reset_data
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* @reset_data: information about the reset
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*/
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static void EFIAPI efi_reset_system_boottime(
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enum efi_reset_type reset_type,
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efi_status_t reset_status,
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unsigned long data_size, void *reset_data)
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{
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struct efi_event *evt;
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EFI_ENTRY("%d %lx %lx %p", reset_type, reset_status, data_size,
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reset_data);
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/* Notify reset */
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list_for_each_entry(evt, &efi_events, link) {
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if (evt->group &&
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!guidcmp(evt->group,
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&efi_guid_event_group_reset_system)) {
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efi_signal_event(evt);
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break;
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}
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}
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switch (reset_type) {
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case EFI_RESET_COLD:
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case EFI_RESET_WARM:
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case EFI_RESET_PLATFORM_SPECIFIC:
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do_reset(NULL, 0, 0, NULL);
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break;
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case EFI_RESET_SHUTDOWN:
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#ifdef CONFIG_CMD_POWEROFF
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do_poweroff(NULL, 0, 0, NULL);
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#endif
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break;
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}
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while (1) { }
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}
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/**
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* efi_get_time_boottime() - get current time at boot time
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*
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* This function implements the GetTime runtime service before
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* SetVirtualAddressMap() is called.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification
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* for details.
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*
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* @time: pointer to structure to receive current time
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* @capabilities: pointer to structure to receive RTC properties
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* Returns: status code
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*/
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static efi_status_t EFIAPI efi_get_time_boottime(
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struct efi_time *time,
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struct efi_time_cap *capabilities)
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{
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#ifdef CONFIG_EFI_GET_TIME
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efi_status_t ret = EFI_SUCCESS;
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struct rtc_time tm;
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struct udevice *dev;
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EFI_ENTRY("%p %p", time, capabilities);
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if (!time) {
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ret = EFI_INVALID_PARAMETER;
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goto out;
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}
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if (uclass_get_device(UCLASS_RTC, 0, &dev) ||
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dm_rtc_get(dev, &tm)) {
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ret = EFI_UNSUPPORTED;
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goto out;
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}
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if (dm_rtc_get(dev, &tm)) {
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ret = EFI_DEVICE_ERROR;
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goto out;
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}
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memset(time, 0, sizeof(*time));
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time->year = tm.tm_year;
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time->month = tm.tm_mon;
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time->day = tm.tm_mday;
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time->hour = tm.tm_hour;
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time->minute = tm.tm_min;
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time->second = tm.tm_sec;
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if (tm.tm_isdst > 0)
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time->daylight =
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EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT;
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else if (!tm.tm_isdst)
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time->daylight = EFI_TIME_ADJUST_DAYLIGHT;
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else
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time->daylight = 0;
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time->timezone = EFI_UNSPECIFIED_TIMEZONE;
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if (capabilities) {
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/* Set reasonable dummy values */
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capabilities->resolution = 1; /* 1 Hz */
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capabilities->accuracy = 100000000; /* 100 ppm */
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capabilities->sets_to_zero = false;
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}
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out:
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return EFI_EXIT(ret);
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#else
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EFI_ENTRY("%p %p", time, capabilities);
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return EFI_EXIT(EFI_UNSUPPORTED);
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#endif
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}
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#ifdef CONFIG_EFI_SET_TIME
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/**
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* efi_validate_time() - checks if timestamp is valid
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*
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* @time: timestamp to validate
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* Returns: 0 if timestamp is valid, 1 otherwise
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*/
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static int efi_validate_time(struct efi_time *time)
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{
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return (!time ||
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time->year < 1900 || time->year > 9999 ||
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!time->month || time->month > 12 || !time->day ||
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time->day > rtc_month_days(time->month - 1, time->year) ||
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time->hour > 23 || time->minute > 59 || time->second > 59 ||
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time->nanosecond > 999999999 ||
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time->daylight &
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~(EFI_TIME_IN_DAYLIGHT | EFI_TIME_ADJUST_DAYLIGHT) ||
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((time->timezone < -1440 || time->timezone > 1440) &&
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time->timezone != EFI_UNSPECIFIED_TIMEZONE));
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}
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#endif
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/**
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* efi_set_time_boottime() - set current time
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*
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* This function implements the SetTime() runtime service before
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* SetVirtualAddressMap() is called.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification
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* for details.
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*
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* @time: pointer to structure to with current time
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* Returns: status code
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*/
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static efi_status_t EFIAPI efi_set_time_boottime(struct efi_time *time)
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{
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#ifdef CONFIG_EFI_SET_TIME
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efi_status_t ret = EFI_SUCCESS;
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struct rtc_time tm;
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struct udevice *dev;
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EFI_ENTRY("%p", time);
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if (efi_validate_time(time)) {
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ret = EFI_INVALID_PARAMETER;
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goto out;
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}
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if (uclass_get_device(UCLASS_RTC, 0, &dev)) {
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ret = EFI_UNSUPPORTED;
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goto out;
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}
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memset(&tm, 0, sizeof(tm));
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tm.tm_year = time->year;
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tm.tm_mon = time->month;
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tm.tm_mday = time->day;
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tm.tm_hour = time->hour;
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tm.tm_min = time->minute;
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tm.tm_sec = time->second;
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switch (time->daylight) {
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case EFI_TIME_ADJUST_DAYLIGHT:
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tm.tm_isdst = 0;
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break;
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case EFI_TIME_ADJUST_DAYLIGHT | EFI_TIME_IN_DAYLIGHT:
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tm.tm_isdst = 1;
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break;
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default:
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tm.tm_isdst = -1;
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break;
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}
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/* Calculate day of week */
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rtc_calc_weekday(&tm);
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if (dm_rtc_set(dev, &tm))
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ret = EFI_DEVICE_ERROR;
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out:
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return EFI_EXIT(ret);
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#else
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EFI_ENTRY("%p", time);
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return EFI_EXIT(EFI_UNSUPPORTED);
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#endif
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}
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/**
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* efi_reset_system() - reset system
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*
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* This function implements the ResetSystem() runtime service after
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* SetVirtualAddressMap() is called. As this placeholder cannot reset the
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* system it simply return to the caller.
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*
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* Boards may override the helpers below to implement reset functionality.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification for
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* details.
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*
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* @reset_type: type of reset to perform
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* @reset_status: status code for the reset
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* @data_size: size of reset_data
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* @reset_data: information about the reset
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*/
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void __weak __efi_runtime EFIAPI efi_reset_system(
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enum efi_reset_type reset_type,
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efi_status_t reset_status,
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unsigned long data_size, void *reset_data)
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{
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return;
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}
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/**
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* efi_reset_system_init() - initialize the reset driver
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*
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* Boards may override this function to initialize the reset driver.
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*/
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efi_status_t __weak efi_reset_system_init(void)
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{
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return EFI_SUCCESS;
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}
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/**
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* efi_get_time() - get current time
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*
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* This function implements the GetTime runtime service after
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* SetVirtualAddressMap() is called. As the U-Boot driver are not available
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* anymore only an error code is returned.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification
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* for details.
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*
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* @time: pointer to structure to receive current time
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* @capabilities: pointer to structure to receive RTC properties
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* Returns: status code
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*/
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efi_status_t __weak __efi_runtime EFIAPI efi_get_time(
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struct efi_time *time,
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struct efi_time_cap *capabilities)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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* efi_set_time() - set current time
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*
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* This function implements the SetTime runtime service after
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* SetVirtualAddressMap() is called. As the U-Boot driver are not available
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* anymore only an error code is returned.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification
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* for details.
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*
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* @time: pointer to structure to with current time
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* Returns: status code
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*/
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efi_status_t __weak __efi_runtime EFIAPI efi_set_time(struct efi_time *time)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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* efi_update_capsule_unsupported() - process information from operating system
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*
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* This function implements the UpdateCapsule() runtime service.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification for
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* details.
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*
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* @capsule_header_array: pointer to array of virtual pointers
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* @capsule_count: number of pointers in capsule_header_array
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* @scatter_gather_list: pointer to array of physical pointers
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* Returns: status code
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*/
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static efi_status_t __efi_runtime EFIAPI efi_update_capsule_unsupported(
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struct efi_capsule_header **capsule_header_array,
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efi_uintn_t capsule_count,
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u64 scatter_gather_list)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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* efi_query_capsule_caps_unsupported() - check if capsule is supported
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*
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* This function implements the QueryCapsuleCapabilities() runtime service.
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*
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* See the Unified Extensible Firmware Interface (UEFI) specification for
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* details.
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*
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* @capsule_header_array: pointer to array of virtual pointers
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* @capsule_count: number of pointers in capsule_header_array
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* @maximum_capsule_size: maximum capsule size
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* @reset_type: type of reset needed for capsule update
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* Returns: status code
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*/
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static efi_status_t __efi_runtime EFIAPI efi_query_capsule_caps_unsupported(
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struct efi_capsule_header **capsule_header_array,
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efi_uintn_t capsule_count,
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u64 *maximum_capsule_size,
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u32 *reset_type)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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* efi_is_runtime_service_pointer() - check if pointer points to runtime table
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*
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* @p: pointer to check
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* Return: true if the pointer points to a service function pointer in the
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* runtime table
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*/
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static bool efi_is_runtime_service_pointer(void *p)
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{
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return (p >= (void *)&efi_runtime_services.get_time &&
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p <= (void *)&efi_runtime_services.query_variable_info) ||
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p == (void *)&efi_events.prev ||
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p == (void *)&efi_events.next;
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}
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/**
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* efi_runtime_detach() - detach unimplemented runtime functions
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*/
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void efi_runtime_detach(void)
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{
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efi_runtime_services.reset_system = efi_reset_system;
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efi_runtime_services.get_time = efi_get_time;
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efi_runtime_services.set_time = efi_set_time;
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if (IS_ENABLED(CONFIG_EFI_RUNTIME_UPDATE_CAPSULE)) {
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/* won't support at runtime */
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|
efi_runtime_services.update_capsule =
|
|
efi_update_capsule_unsupported;
|
|
efi_runtime_services.query_capsule_caps =
|
|
efi_query_capsule_caps_unsupported;
|
|
}
|
|
|
|
/* Update CRC32 */
|
|
efi_update_table_header_crc32(&efi_runtime_services.hdr);
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
__efi_runtime efi_status_t EFIAPI
|
|
efi_convert_pointer(efi_uintn_t debug_disposition, void **address)
|
|
{
|
|
efi_physical_addr_t addr;
|
|
efi_uintn_t i;
|
|
efi_status_t ret = EFI_NOT_FOUND;
|
|
|
|
if (!efi_virtmap) {
|
|
ret = EFI_UNSUPPORTED;
|
|
goto out;
|
|
}
|
|
|
|
if (!address) {
|
|
ret = EFI_INVALID_PARAMETER;
|
|
goto out;
|
|
}
|
|
if (!*address) {
|
|
if (debug_disposition & EFI_OPTIONAL_PTR)
|
|
return EFI_SUCCESS;
|
|
else
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
addr = (uintptr_t)*address;
|
|
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 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);
|
|
}
|
|
|
|
/* Relocate EFI runtime to uboot_reloc_base = offset */
|
|
void efi_runtime_relocate(ulong offset, struct efi_mem_desc *map)
|
|
{
|
|
#ifdef IS_RELA
|
|
struct elf_rela *rel = (void*)&__efi_runtime_rel_start;
|
|
#else
|
|
struct elf_rel *rel = (void*)&__efi_runtime_rel_start;
|
|
static ulong lastoff = CONFIG_TEXT_BASE;
|
|
#endif
|
|
|
|
debug("%s: Relocating to offset=%lx\n", __func__, offset);
|
|
for (; (ulong)rel < (ulong)&__efi_runtime_rel_stop; rel++) {
|
|
ulong base = CONFIG_TEXT_BASE;
|
|
ulong *p;
|
|
ulong newaddr;
|
|
|
|
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);
|
|
|
|
switch (rel->info & R_MASK) {
|
|
case R_RELATIVE:
|
|
#ifdef IS_RELA
|
|
newaddr = rel->addend + offset - CONFIG_TEXT_BASE;
|
|
#else
|
|
newaddr = *p - lastoff + offset;
|
|
#endif
|
|
break;
|
|
#ifdef R_ABSOLUTE
|
|
case R_ABSOLUTE: {
|
|
ulong symidx = rel->info >> SYM_INDEX;
|
|
extern struct dyn_sym __dyn_sym_start[];
|
|
newaddr = __dyn_sym_start[symidx].addr + offset;
|
|
#ifdef IS_RELA
|
|
newaddr -= CONFIG_TEXT_BASE;
|
|
#endif
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
printf("%s: Unknown relocation type %llx\n",
|
|
__func__, rel->info & R_MASK);
|
|
continue;
|
|
}
|
|
|
|
/* Check if the relocation is inside bounds */
|
|
if (map && ((newaddr < map->virtual_start) ||
|
|
newaddr > (map->virtual_start +
|
|
(map->num_pages << EFI_PAGE_SHIFT)))) {
|
|
printf("%s: Relocation at %p is out of range (%lx)\n",
|
|
__func__, p, newaddr);
|
|
continue;
|
|
}
|
|
|
|
debug("%s: Setting %p to %lx\n", __func__, p, newaddr);
|
|
*p = newaddr;
|
|
flush_dcache_range((ulong)p & ~(EFI_CACHELINE_SIZE - 1),
|
|
ALIGN((ulong)&p[1], EFI_CACHELINE_SIZE));
|
|
}
|
|
|
|
#ifndef IS_RELA
|
|
lastoff = offset;
|
|
#endif
|
|
|
|
invalidate_icache_all();
|
|
}
|
|
|
|
/**
|
|
* efi_set_virtual_address_map() - change from physical to virtual mapping
|
|
*
|
|
* This function implements the SetVirtualAddressMap() runtime service.
|
|
*
|
|
* 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
|
|
*/
|
|
static efi_status_t EFIAPI efi_set_virtual_address_map(
|
|
efi_uintn_t memory_map_size,
|
|
efi_uintn_t descriptor_size,
|
|
uint32_t descriptor_version,
|
|
struct efi_mem_desc *virtmap)
|
|
{
|
|
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("%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
|
|
* SetVirtualAddressMap() events and ConvertPointer() to allow
|
|
* dynamically loaded drivers to expose runtime services, we don't
|
|
* today.
|
|
*
|
|
* So let's ensure we see exactly one single runtime section, as
|
|
* that is the built-in one. If we see more (or less), someone must
|
|
* have tried adding or removing to that which we don't support yet.
|
|
* In that case, let's better fail rather than expose broken runtime
|
|
* services.
|
|
*/
|
|
for (i = 0; i < n; i++) {
|
|
struct efi_mem_desc *map = (void*)virtmap +
|
|
(descriptor_size * i);
|
|
|
|
if (map->type == EFI_RUNTIME_SERVICES_CODE)
|
|
rt_code_sections++;
|
|
}
|
|
|
|
if (rt_code_sections != 1) {
|
|
/*
|
|
* We expose exactly one single runtime code section, so
|
|
* something is definitely going wrong.
|
|
*/
|
|
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 */
|
|
for (i = 0; i < n; i++) {
|
|
struct efi_mem_desc *map = (void*)virtmap +
|
|
(descriptor_size * i);
|
|
struct list_head *lhandle;
|
|
efi_physical_addr_t map_start = map->physical_start;
|
|
efi_physical_addr_t map_len = map->num_pages << EFI_PAGE_SHIFT;
|
|
efi_physical_addr_t map_end = map_start + map_len;
|
|
u64 off = map->virtual_start - map_start;
|
|
|
|
/* Adjust all mmio pointers in this region */
|
|
list_for_each(lhandle, &efi_runtime_mmio) {
|
|
struct efi_runtime_mmio_list *lmmio;
|
|
|
|
lmmio = list_entry(lhandle,
|
|
struct efi_runtime_mmio_list,
|
|
link);
|
|
if ((map_start <= lmmio->paddr) &&
|
|
(map_end >= lmmio->paddr)) {
|
|
uintptr_t new_addr = lmmio->paddr + off;
|
|
*lmmio->ptr = (void *)new_addr;
|
|
}
|
|
}
|
|
if ((map_start <= (uintptr_t)systab.tables) &&
|
|
(map_end >= (uintptr_t)systab.tables)) {
|
|
char *ptr = (char *)systab.tables;
|
|
|
|
ptr += off;
|
|
systab.tables = (struct efi_configuration_table *)ptr;
|
|
}
|
|
}
|
|
|
|
/* Relocate the runtime. See TODO above */
|
|
for (i = 0; i < n; i++) {
|
|
struct efi_mem_desc *map;
|
|
|
|
map = (void*)virtmap + (descriptor_size * i);
|
|
if (map->type == EFI_RUNTIME_SERVICES_CODE) {
|
|
ulong new_offset = map->virtual_start -
|
|
map->physical_start + gd->relocaddr;
|
|
|
|
efi_relocate_runtime_table(new_offset);
|
|
efi_runtime_relocate(new_offset, map);
|
|
ret = EFI_SUCCESS;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
out:
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
/**
|
|
* efi_add_runtime_mmio() - add memory-mapped IO region
|
|
*
|
|
* This function adds a memory-mapped IO region to the memory map to make it
|
|
* available at runtime.
|
|
*
|
|
* @mmio_ptr: pointer to a pointer to the start of the memory-mapped
|
|
* IO region
|
|
* @len: size of the memory-mapped IO region
|
|
* Returns: status code
|
|
*/
|
|
efi_status_t efi_add_runtime_mmio(void *mmio_ptr, u64 len)
|
|
{
|
|
struct efi_runtime_mmio_list *newmmio;
|
|
uint64_t addr = *(uintptr_t *)mmio_ptr;
|
|
efi_status_t ret;
|
|
|
|
ret = efi_add_memory_map(addr, len, EFI_MMAP_IO);
|
|
if (ret != EFI_SUCCESS)
|
|
return EFI_OUT_OF_RESOURCES;
|
|
|
|
newmmio = calloc(1, sizeof(*newmmio));
|
|
if (!newmmio)
|
|
return EFI_OUT_OF_RESOURCES;
|
|
newmmio->ptr = mmio_ptr;
|
|
newmmio->paddr = *(uintptr_t *)mmio_ptr;
|
|
newmmio->len = len;
|
|
list_add_tail(&newmmio->link, &efi_runtime_mmio);
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* In the second stage, U-Boot has disappeared. To isolate our runtime code
|
|
* that at this point still exists from the rest, we put it into a special
|
|
* section.
|
|
*
|
|
* !!WARNING!!
|
|
*
|
|
* This means that we can not rely on any code outside of this file in any
|
|
* function or variable below this line.
|
|
*
|
|
* Please keep everything fully self-contained and annotated with
|
|
* __efi_runtime and __efi_runtime_data markers.
|
|
*/
|
|
|
|
/*
|
|
* Relocate the EFI runtime stub to a different place. We need to call this
|
|
* the first time we expose the runtime interface to a user and on set virtual
|
|
* address map calls.
|
|
*/
|
|
|
|
/**
|
|
* efi_unimplemented() - replacement function, returns EFI_UNSUPPORTED
|
|
*
|
|
* 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_UNSUPPORTED
|
|
*/
|
|
static efi_status_t __efi_runtime EFIAPI efi_unimplemented(void)
|
|
{
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
struct efi_runtime_services __efi_runtime_data efi_runtime_services = {
|
|
.hdr = {
|
|
.signature = EFI_RUNTIME_SERVICES_SIGNATURE,
|
|
.revision = EFI_SPECIFICATION_VERSION,
|
|
.headersize = sizeof(struct efi_runtime_services),
|
|
},
|
|
.get_time = &efi_get_time_boottime,
|
|
.set_time = &efi_set_time_boottime,
|
|
.get_wakeup_time = (void *)&efi_unimplemented,
|
|
.set_wakeup_time = (void *)&efi_unimplemented,
|
|
.set_virtual_address_map = &efi_set_virtual_address_map,
|
|
.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_unimplemented,
|
|
.reset_system = &efi_reset_system_boottime,
|
|
#ifdef CONFIG_EFI_RUNTIME_UPDATE_CAPSULE
|
|
.update_capsule = efi_update_capsule,
|
|
.query_capsule_caps = efi_query_capsule_caps,
|
|
#else
|
|
.update_capsule = efi_update_capsule_unsupported,
|
|
.query_capsule_caps = efi_query_capsule_caps_unsupported,
|
|
#endif
|
|
.query_variable_info = efi_query_variable_info,
|
|
};
|