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https://github.com/brain-hackers/u-boot-brain
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![Rob Clark](/assets/img/avatar_default.png)
This should make it easier to see when a callback back to UEFI world calls back in to the u-boot world, and generally match up EFI_ENTRY() and EFI_EXIT() calls. Signed-off-by: Rob Clark <robdclark@gmail.com> [agraf: remove static from const var] Signed-off-by: Alexander Graf <agraf@suse.de>
1259 lines
31 KiB
C
1259 lines
31 KiB
C
/*
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* EFI application boot time services
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*
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* Copyright (c) 2016 Alexander Graf
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <efi_loader.h>
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#include <malloc.h>
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#include <asm/global_data.h>
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#include <libfdt_env.h>
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#include <u-boot/crc.h>
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#include <bootm.h>
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#include <inttypes.h>
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#include <watchdog.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* This list contains all the EFI objects our payload has access to */
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LIST_HEAD(efi_obj_list);
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/*
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* If we're running on nasty systems (32bit ARM booting into non-EFI Linux)
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* we need to do trickery with caches. Since we don't want to break the EFI
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* aware boot path, only apply hacks when loading exiting directly (breaking
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* direct Linux EFI booting along the way - oh well).
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*/
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static bool efi_is_direct_boot = true;
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/*
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* EFI can pass arbitrary additional "tables" containing vendor specific
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* information to the payload. One such table is the FDT table which contains
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* a pointer to a flattened device tree blob.
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*
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* In most cases we want to pass an FDT to the payload, so reserve one slot of
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* config table space for it. The pointer gets populated by do_bootefi_exec().
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*/
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static struct efi_configuration_table __efi_runtime_data efi_conf_table[2];
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#ifdef CONFIG_ARM
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/*
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* The "gd" pointer lives in a register on ARM and AArch64 that we declare
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* fixed when compiling U-Boot. However, the payload does not know about that
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* restriction so we need to manually swap its and our view of that register on
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* EFI callback entry/exit.
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*/
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static volatile void *efi_gd, *app_gd;
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#endif
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static int entry_count;
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static int nesting_level;
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/* Called on every callback entry */
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int __efi_entry_check(void)
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{
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int ret = entry_count++ == 0;
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#ifdef CONFIG_ARM
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assert(efi_gd);
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app_gd = gd;
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gd = efi_gd;
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#endif
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return ret;
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}
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/* Called on every callback exit */
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int __efi_exit_check(void)
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{
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int ret = --entry_count == 0;
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#ifdef CONFIG_ARM
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gd = app_gd;
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#endif
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return ret;
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}
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/* Called from do_bootefi_exec() */
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void efi_save_gd(void)
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{
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#ifdef CONFIG_ARM
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efi_gd = gd;
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#endif
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}
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/*
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* Special case handler for error/abort that just forces things back
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* to u-boot world so we can dump out an abort msg, without any care
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* about returning back to UEFI world.
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*/
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void efi_restore_gd(void)
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{
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#ifdef CONFIG_ARM
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/* Only restore if we're already in EFI context */
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if (!efi_gd)
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return;
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gd = efi_gd;
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#endif
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}
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/*
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* Two spaces per indent level, maxing out at 10.. which ought to be
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* enough for anyone ;-)
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*/
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static const char *indent_string(int level)
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{
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const char *indent = " ";
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const int max = strlen(indent);
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level = min(max, level * 2);
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return &indent[max - level];
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}
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const char *__efi_nesting_inc(void)
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{
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return indent_string(nesting_level++);
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}
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const char *__efi_nesting_dec(void)
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{
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return indent_string(--nesting_level);
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}
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/* Low 32 bit */
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#define EFI_LOW32(a) (a & 0xFFFFFFFFULL)
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/* High 32 bit */
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#define EFI_HIGH32(a) (a >> 32)
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/*
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* 64bit division by 10 implemented as multiplication by 1 / 10
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*
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* Decimals of one tenth: 0x1 / 0xA = 0x0.19999...
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*/
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#define EFI_TENTH 0x199999999999999A
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static u64 efi_div10(u64 a)
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{
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u64 prod;
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u64 rem;
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u64 ret;
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ret = EFI_HIGH32(a) * EFI_HIGH32(EFI_TENTH);
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prod = EFI_HIGH32(a) * EFI_LOW32(EFI_TENTH);
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rem = EFI_LOW32(prod);
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ret += EFI_HIGH32(prod);
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prod = EFI_LOW32(a) * EFI_HIGH32(EFI_TENTH);
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rem += EFI_LOW32(prod);
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ret += EFI_HIGH32(prod);
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prod = EFI_LOW32(a) * EFI_LOW32(EFI_TENTH);
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rem += EFI_HIGH32(prod);
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ret += EFI_HIGH32(rem);
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/* Round to nearest integer */
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if (rem >= (1 << 31))
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++ret;
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return ret;
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}
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void efi_signal_event(struct efi_event *event)
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{
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if (event->signaled)
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return;
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event->signaled = 1;
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if (event->type & EVT_NOTIFY_SIGNAL) {
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EFI_CALL(event->notify_function(event, event->notify_context));
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}
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}
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static efi_status_t efi_unsupported(const char *funcname)
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{
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debug("EFI: App called into unimplemented function %s\n", funcname);
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return EFI_EXIT(EFI_UNSUPPORTED);
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}
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static unsigned long EFIAPI efi_raise_tpl(UINTN new_tpl)
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{
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EFI_ENTRY("0x%zx", new_tpl);
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return EFI_EXIT(0);
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}
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static void EFIAPI efi_restore_tpl(UINTN old_tpl)
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{
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EFI_ENTRY("0x%zx", old_tpl);
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efi_unsupported(__func__);
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}
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static efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type,
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unsigned long pages,
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uint64_t *memory)
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{
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efi_status_t r;
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EFI_ENTRY("%d, %d, 0x%lx, %p", type, memory_type, pages, memory);
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r = efi_allocate_pages(type, memory_type, pages, memory);
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return EFI_EXIT(r);
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}
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static efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory,
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unsigned long pages)
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{
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efi_status_t r;
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EFI_ENTRY("%"PRIx64", 0x%lx", memory, pages);
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r = efi_free_pages(memory, pages);
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return EFI_EXIT(r);
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}
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static efi_status_t EFIAPI efi_get_memory_map_ext(
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unsigned long *memory_map_size,
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struct efi_mem_desc *memory_map,
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unsigned long *map_key,
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unsigned long *descriptor_size,
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uint32_t *descriptor_version)
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{
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efi_status_t r;
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EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map,
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map_key, descriptor_size, descriptor_version);
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r = efi_get_memory_map(memory_map_size, memory_map, map_key,
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descriptor_size, descriptor_version);
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return EFI_EXIT(r);
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}
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static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type,
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unsigned long size,
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void **buffer)
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{
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efi_status_t r;
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EFI_ENTRY("%d, %ld, %p", pool_type, size, buffer);
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r = efi_allocate_pool(pool_type, size, buffer);
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return EFI_EXIT(r);
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}
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static efi_status_t EFIAPI efi_free_pool_ext(void *buffer)
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{
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efi_status_t r;
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EFI_ENTRY("%p", buffer);
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r = efi_free_pool(buffer);
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return EFI_EXIT(r);
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}
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/*
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* Our event capabilities are very limited. Only a small limited
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* number of events is allowed to coexist.
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*/
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static struct efi_event efi_events[16];
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efi_status_t efi_create_event(uint32_t type, UINTN notify_tpl,
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void (EFIAPI *notify_function) (
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struct efi_event *event,
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void *context),
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void *notify_context, struct efi_event **event)
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{
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int i;
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if (event == NULL)
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return EFI_INVALID_PARAMETER;
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if ((type & EVT_NOTIFY_SIGNAL) && (type & EVT_NOTIFY_WAIT))
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return EFI_INVALID_PARAMETER;
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if ((type & (EVT_NOTIFY_SIGNAL|EVT_NOTIFY_WAIT)) &&
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notify_function == NULL)
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return EFI_INVALID_PARAMETER;
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for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
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if (efi_events[i].type)
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continue;
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efi_events[i].type = type;
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efi_events[i].notify_tpl = notify_tpl;
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efi_events[i].notify_function = notify_function;
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efi_events[i].notify_context = notify_context;
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/* Disable timers on bootup */
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efi_events[i].trigger_next = -1ULL;
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efi_events[i].signaled = 0;
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*event = &efi_events[i];
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return EFI_SUCCESS;
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}
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return EFI_OUT_OF_RESOURCES;
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}
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static efi_status_t EFIAPI efi_create_event_ext(
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uint32_t type, UINTN notify_tpl,
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void (EFIAPI *notify_function) (
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struct efi_event *event,
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void *context),
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void *notify_context, struct efi_event **event)
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{
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EFI_ENTRY("%d, 0x%zx, %p, %p", type, notify_tpl, notify_function,
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notify_context);
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return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function,
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notify_context, event));
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}
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/*
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* Our timers have to work without interrupts, so we check whenever keyboard
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* input or disk accesses happen if enough time elapsed for it to fire.
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*/
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void efi_timer_check(void)
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{
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int i;
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u64 now = timer_get_us();
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for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
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if (!efi_events[i].type ||
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!(efi_events[i].type & EVT_TIMER) ||
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efi_events[i].trigger_type == EFI_TIMER_STOP ||
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now < efi_events[i].trigger_next)
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continue;
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if (efi_events[i].trigger_type == EFI_TIMER_PERIODIC) {
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efi_events[i].trigger_next +=
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efi_events[i].trigger_time;
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efi_events[i].signaled = 0;
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}
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efi_signal_event(&efi_events[i]);
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}
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WATCHDOG_RESET();
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}
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efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
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uint64_t trigger_time)
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{
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int i;
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/*
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* The parameter defines a multiple of 100ns.
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* We use multiples of 1000ns. So divide by 10.
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*/
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trigger_time = efi_div10(trigger_time);
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for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
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if (event != &efi_events[i])
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continue;
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if (!(event->type & EVT_TIMER))
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break;
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switch (type) {
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case EFI_TIMER_STOP:
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event->trigger_next = -1ULL;
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break;
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case EFI_TIMER_PERIODIC:
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case EFI_TIMER_RELATIVE:
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event->trigger_next =
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timer_get_us() + trigger_time;
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break;
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default:
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return EFI_INVALID_PARAMETER;
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}
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event->trigger_type = type;
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event->trigger_time = trigger_time;
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return EFI_SUCCESS;
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}
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return EFI_INVALID_PARAMETER;
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}
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static efi_status_t EFIAPI efi_set_timer_ext(struct efi_event *event,
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enum efi_timer_delay type,
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uint64_t trigger_time)
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{
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EFI_ENTRY("%p, %d, %"PRIx64, event, type, trigger_time);
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return EFI_EXIT(efi_set_timer(event, type, trigger_time));
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}
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static efi_status_t EFIAPI efi_wait_for_event(unsigned long num_events,
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struct efi_event **event,
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unsigned long *index)
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{
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int i, j;
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EFI_ENTRY("%ld, %p, %p", num_events, event, index);
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/* Check parameters */
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if (!num_events || !event)
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return EFI_EXIT(EFI_INVALID_PARAMETER);
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for (i = 0; i < num_events; ++i) {
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for (j = 0; j < ARRAY_SIZE(efi_events); ++j) {
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if (event[i] == &efi_events[j])
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goto known_event;
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}
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return EFI_EXIT(EFI_INVALID_PARAMETER);
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known_event:
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if (!event[i]->type || event[i]->type & EVT_NOTIFY_SIGNAL)
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return EFI_EXIT(EFI_INVALID_PARAMETER);
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}
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/* Wait for signal */
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for (;;) {
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for (i = 0; i < num_events; ++i) {
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if (event[i]->signaled)
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goto out;
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}
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/* Allow events to occur. */
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efi_timer_check();
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}
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out:
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/*
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* Reset the signal which is passed to the caller to allow periodic
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* events to occur.
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*/
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event[i]->signaled = 0;
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if (index)
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*index = i;
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return EFI_EXIT(EFI_SUCCESS);
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}
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static efi_status_t EFIAPI efi_signal_event_ext(struct efi_event *event)
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{
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int i;
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EFI_ENTRY("%p", event);
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for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
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if (event != &efi_events[i])
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continue;
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efi_signal_event(event);
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break;
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}
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return EFI_EXIT(EFI_SUCCESS);
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}
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static efi_status_t EFIAPI efi_close_event(struct efi_event *event)
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{
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int i;
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EFI_ENTRY("%p", event);
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for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
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if (event == &efi_events[i]) {
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event->type = 0;
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event->trigger_next = -1ULL;
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event->signaled = 0;
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return EFI_EXIT(EFI_SUCCESS);
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}
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}
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return EFI_EXIT(EFI_INVALID_PARAMETER);
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}
|
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|
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static efi_status_t EFIAPI efi_check_event(struct efi_event *event)
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{
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int i;
|
|
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EFI_ENTRY("%p", event);
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efi_timer_check();
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for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
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if (event != &efi_events[i])
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continue;
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if (!event->type || event->type & EVT_NOTIFY_SIGNAL)
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break;
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if (event->signaled)
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return EFI_EXIT(EFI_SUCCESS);
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return EFI_EXIT(EFI_NOT_READY);
|
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}
|
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return EFI_EXIT(EFI_INVALID_PARAMETER);
|
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}
|
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|
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static efi_status_t EFIAPI efi_install_protocol_interface(void **handle,
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efi_guid_t *protocol, int protocol_interface_type,
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void *protocol_interface)
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{
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struct list_head *lhandle;
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int i;
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efi_status_t r;
|
|
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if (!handle || !protocol ||
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protocol_interface_type != EFI_NATIVE_INTERFACE) {
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r = EFI_INVALID_PARAMETER;
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goto out;
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}
|
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/* Create new handle if requested. */
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if (!*handle) {
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r = EFI_OUT_OF_RESOURCES;
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goto out;
|
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}
|
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/* Find object. */
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list_for_each(lhandle, &efi_obj_list) {
|
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struct efi_object *efiobj;
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efiobj = list_entry(lhandle, struct efi_object, link);
|
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if (efiobj->handle != *handle)
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continue;
|
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/* Check if protocol is already installed on the handle. */
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for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
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struct efi_handler *handler = &efiobj->protocols[i];
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if (!handler->guid)
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continue;
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if (!guidcmp(handler->guid, protocol)) {
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r = EFI_INVALID_PARAMETER;
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goto out;
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}
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}
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/* Install protocol in first empty slot. */
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for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
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struct efi_handler *handler = &efiobj->protocols[i];
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if (handler->guid)
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continue;
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handler->guid = protocol;
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handler->protocol_interface = protocol_interface;
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r = EFI_SUCCESS;
|
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goto out;
|
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}
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r = EFI_OUT_OF_RESOURCES;
|
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goto out;
|
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}
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r = EFI_INVALID_PARAMETER;
|
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out:
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return r;
|
|
}
|
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|
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static efi_status_t EFIAPI efi_install_protocol_interface_ext(void **handle,
|
|
efi_guid_t *protocol, int protocol_interface_type,
|
|
void *protocol_interface)
|
|
{
|
|
EFI_ENTRY("%p, %p, %d, %p", handle, protocol, protocol_interface_type,
|
|
protocol_interface);
|
|
|
|
return EFI_EXIT(efi_install_protocol_interface(handle, protocol,
|
|
protocol_interface_type,
|
|
protocol_interface));
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
|
|
efi_guid_t *protocol, void *old_interface,
|
|
void *new_interface)
|
|
{
|
|
EFI_ENTRY("%p, %p, %p, %p", handle, protocol, old_interface,
|
|
new_interface);
|
|
return EFI_EXIT(EFI_ACCESS_DENIED);
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_uninstall_protocol_interface(void *handle,
|
|
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;
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_uninstall_protocol_interface_ext(void *handle,
|
|
efi_guid_t *protocol, void *protocol_interface)
|
|
{
|
|
EFI_ENTRY("%p, %p, %p", handle, protocol, protocol_interface);
|
|
|
|
return EFI_EXIT(efi_uninstall_protocol_interface(handle, protocol,
|
|
protocol_interface));
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_register_protocol_notify(efi_guid_t *protocol,
|
|
struct efi_event *event,
|
|
void **registration)
|
|
{
|
|
EFI_ENTRY("%p, %p, %p", protocol, event, registration);
|
|
return EFI_EXIT(EFI_OUT_OF_RESOURCES);
|
|
}
|
|
|
|
static int efi_search(enum efi_locate_search_type search_type,
|
|
efi_guid_t *protocol, void *search_key,
|
|
struct efi_object *efiobj)
|
|
{
|
|
int i;
|
|
|
|
switch (search_type) {
|
|
case all_handles:
|
|
return 0;
|
|
case by_register_notify:
|
|
return -1;
|
|
case by_protocol:
|
|
for (i = 0; i < ARRAY_SIZE(efiobj->protocols); i++) {
|
|
const efi_guid_t *guid = efiobj->protocols[i].guid;
|
|
if (guid && !guidcmp(guid, protocol))
|
|
return 0;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_locate_handle(
|
|
enum efi_locate_search_type search_type,
|
|
efi_guid_t *protocol, void *search_key,
|
|
unsigned long *buffer_size, efi_handle_t *buffer)
|
|
{
|
|
struct list_head *lhandle;
|
|
unsigned long size = 0;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* Then fill the array */
|
|
list_for_each(lhandle, &efi_obj_list) {
|
|
struct efi_object *efiobj;
|
|
efiobj = list_entry(lhandle, struct efi_object, link);
|
|
if (!efi_search(search_type, protocol, search_key, efiobj)) {
|
|
*(buffer++) = efiobj->handle;
|
|
}
|
|
}
|
|
|
|
*buffer_size = size;
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_locate_handle_ext(
|
|
enum efi_locate_search_type search_type,
|
|
efi_guid_t *protocol, void *search_key,
|
|
unsigned long *buffer_size, efi_handle_t *buffer)
|
|
{
|
|
EFI_ENTRY("%d, %p, %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));
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_locate_device_path(efi_guid_t *protocol,
|
|
struct efi_device_path **device_path,
|
|
efi_handle_t *device)
|
|
{
|
|
EFI_ENTRY("%p, %p, %p", protocol, device_path, device);
|
|
return EFI_EXIT(EFI_NOT_FOUND);
|
|
}
|
|
|
|
/* 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--;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid,
|
|
void *table)
|
|
{
|
|
EFI_ENTRY("%p, %p", guid, table);
|
|
return EFI_EXIT(efi_install_configuration_table(guid, table));
|
|
}
|
|
|
|
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)
|
|
{
|
|
static struct efi_object loaded_image_info_obj = {
|
|
.protocols = {
|
|
{
|
|
.guid = &efi_guid_loaded_image,
|
|
},
|
|
},
|
|
};
|
|
struct efi_loaded_image *info;
|
|
struct efi_object *obj;
|
|
|
|
EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy, parent_image,
|
|
file_path, source_buffer, source_size, image_handle);
|
|
info = malloc(sizeof(*info));
|
|
loaded_image_info_obj.protocols[0].protocol_interface = info;
|
|
obj = malloc(sizeof(loaded_image_info_obj));
|
|
memset(info, 0, sizeof(*info));
|
|
memcpy(obj, &loaded_image_info_obj, sizeof(loaded_image_info_obj));
|
|
obj->handle = info;
|
|
info->file_path = file_path;
|
|
info->reserved = efi_load_pe(source_buffer, info);
|
|
if (!info->reserved) {
|
|
free(info);
|
|
free(obj);
|
|
return EFI_EXIT(EFI_UNSUPPORTED);
|
|
}
|
|
|
|
*image_handle = info;
|
|
list_add_tail(&obj->link, &efi_obj_list);
|
|
|
|
return EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
|
|
static efi_status_t 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);
|
|
}
|
|
|
|
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);
|
|
|
|
loaded_image_info->exit_status = exit_status;
|
|
longjmp(&loaded_image_info->exit_jmp, 1);
|
|
|
|
panic("EFI application exited");
|
|
}
|
|
|
|
static struct efi_object *efi_search_obj(void *handle)
|
|
{
|
|
struct list_head *lhandle;
|
|
|
|
list_for_each(lhandle, &efi_obj_list) {
|
|
struct efi_object *efiobj;
|
|
efiobj = list_entry(lhandle, struct efi_object, link);
|
|
if (efiobj->handle == handle)
|
|
return efiobj;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static efi_status_t 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);
|
|
}
|
|
|
|
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
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_exit_boot_services(void *image_handle,
|
|
unsigned long map_key)
|
|
{
|
|
EFI_ENTRY("%p, %ld", image_handle, map_key);
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_stall(unsigned long microseconds)
|
|
{
|
|
EFI_ENTRY("%ld", microseconds);
|
|
udelay(microseconds);
|
|
return EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
|
|
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__);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_close_protocol(void *handle,
|
|
efi_guid_t *protocol,
|
|
void *agent_handle,
|
|
void *controller_handle)
|
|
{
|
|
EFI_ENTRY("%p, %p, %p, %p", handle, protocol, agent_handle,
|
|
controller_handle);
|
|
return EFI_EXIT(EFI_NOT_FOUND);
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_open_protocol_information(efi_handle_t handle,
|
|
efi_guid_t *protocol,
|
|
struct efi_open_protocol_info_entry **entry_buffer,
|
|
unsigned long *entry_count)
|
|
{
|
|
EFI_ENTRY("%p, %p, %p, %p", handle, protocol, entry_buffer,
|
|
entry_count);
|
|
return EFI_EXIT(EFI_NOT_FOUND);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_locate_handle_buffer(
|
|
enum efi_locate_search_type search_type,
|
|
efi_guid_t *protocol, void *search_key,
|
|
unsigned long *no_handles, efi_handle_t **buffer)
|
|
{
|
|
efi_status_t r;
|
|
unsigned long buffer_size = 0;
|
|
|
|
EFI_ENTRY("%d, %p, %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);
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_locate_protocol(efi_guid_t *protocol,
|
|
void *registration,
|
|
void **protocol_interface)
|
|
{
|
|
struct list_head *lhandle;
|
|
int i;
|
|
|
|
EFI_ENTRY("%p, %p, %p", protocol, registration, protocol_interface);
|
|
|
|
if (!protocol || !protocol_interface)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
|
|
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);
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces(
|
|
void **handle, ...)
|
|
{
|
|
EFI_ENTRY("%p", handle);
|
|
|
|
va_list argptr;
|
|
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);
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
|
|
void *handle, ...)
|
|
{
|
|
EFI_ENTRY("%p", handle);
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static void EFIAPI efi_copy_mem(void *destination, void *source,
|
|
unsigned long length)
|
|
{
|
|
EFI_ENTRY("%p, %p, %ld", destination, source, length);
|
|
memcpy(destination, source, length);
|
|
}
|
|
|
|
static void EFIAPI efi_set_mem(void *buffer, unsigned long size, uint8_t value)
|
|
{
|
|
EFI_ENTRY("%p, %ld, 0x%x", buffer, size, value);
|
|
memset(buffer, value, size);
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_open_protocol(
|
|
void *handle, efi_guid_t *protocol,
|
|
void **protocol_interface, void *agent_handle,
|
|
void *controller_handle, uint32_t attributes)
|
|
{
|
|
struct list_head *lhandle;
|
|
int i;
|
|
efi_status_t r = EFI_INVALID_PARAMETER;
|
|
|
|
EFI_ENTRY("%p, %p, %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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static efi_status_t EFIAPI efi_handle_protocol(void *handle,
|
|
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,
|
|
};
|