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efiboot.c revision 1.3 
      1 /*	$NetBSD: efiboot.c,v 1.3 2017/02/11 10:15:55 nonaka Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2016 Kimihiro Nonaka <nonaka (at) netbsd.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include "efiboot.h"
     30 
     31 #include "bootinfo.h"
     32 #include "devopen.h"
     33 
     34 EFI_HANDLE IH;
     35 EFI_DEVICE_PATH *efi_bootdp;
     36 EFI_LOADED_IMAGE *efi_li;
     37 uintptr_t efi_main_sp;
     38 bool efi_cleanuped;
     39 
     40 static EFI_PHYSICAL_ADDRESS heap_start = EFI_ALLOCATE_MAX_ADDRESS;
     41 static UINTN heap_size = 1 * 1024 * 1024;			/* 1MB */
     42 static struct btinfo_efi btinfo_efi;
     43 
     44 static void efi_heap_init(void);
     45 
     46 EFI_STATUS EFIAPI efi_main(EFI_HANDLE, EFI_SYSTEM_TABLE *);
     47 EFI_STATUS EFIAPI
     48 efi_main(EFI_HANDLE imageHandle, EFI_SYSTEM_TABLE *systemTable)
     49 {
     50 	EFI_STATUS status;
     51 	EFI_DEVICE_PATH *dp0, *dp;
     52 	extern char twiddle_toggle;
     53 
     54 	IH = imageHandle;
     55 	InitializeLib(IH, systemTable);
     56 
     57 	efi_main_sp = (uintptr_t)&status;
     58 	twiddle_toggle = 1;	/* no twiddling until we're ready */
     59 
     60 	cninit();
     61 	efi_heap_init();
     62 	efi_md_init();
     63 
     64 	status = uefi_call_wrapper(BS->HandleProtocol, 3, IH,
     65 	    &LoadedImageProtocol, (void **)&efi_li);
     66 	if (EFI_ERROR(status))
     67 		Panic(L"HandleProtocol(LoadedImageProtocol): %r", status);
     68 	status = uefi_call_wrapper(BS->HandleProtocol, 3, efi_li->DeviceHandle,
     69 	    &DevicePathProtocol, (void **)&dp0);
     70 	if (EFI_ERROR(status))
     71 		Panic(L"HandleProtocol(DevicePathProtocol): %r", status);
     72 	for (dp = dp0; !IsDevicePathEnd(dp); dp = NextDevicePathNode(dp)) {
     73 		if (DevicePathType(dp) == MEDIA_DEVICE_PATH)
     74 			continue;
     75 		if (DevicePathSubType(dp) == MEDIA_HARDDRIVE_DP) {
     76 			boot_biosdev = 0x80;
     77 			efi_bootdp = dp;
     78 			break;
     79 		}
     80 		break;
     81 	}
     82 
     83 	efi_disk_probe();
     84 
     85 	status = uefi_call_wrapper(BS->SetWatchdogTimer, 4, 0, 0, 0, NULL);
     86 	if (EFI_ERROR(status))
     87 		Panic(L"SetWatchdogTimer: %r", status);
     88 
     89 	boot();
     90 
     91 	return EFI_SUCCESS;
     92 }
     93 
     94 void
     95 efi_cleanup(void)
     96 {
     97 	EFI_STATUS status;
     98 	EFI_MEMORY_DESCRIPTOR *desc;
     99 	UINTN NoEntries, MapKey, DescriptorSize;
    100 	UINT32 DescriptorVersion;
    101 	struct btinfo_efimemmap *bim;
    102 	size_t allocsz;
    103 
    104 	clearit();
    105 
    106 	memset(&btinfo_efi, 0, sizeof(btinfo_efi));
    107 	btinfo_efi.systblpa = (intptr_t)ST;
    108 #ifdef	__i386__	/* bootia32.efi */
    109 	btinfo_efi.flags |= BI_EFI_32BIT;
    110 #endif
    111 	BI_ADD(&btinfo_efi, BTINFO_EFI, sizeof(btinfo_efi));
    112 
    113 	NoEntries = 0;
    114 	desc = efi_memory_get_map(&NoEntries, &MapKey, &DescriptorSize,
    115 	    &DescriptorVersion, true);
    116 	status = uefi_call_wrapper(BS->ExitBootServices, 2, IH, MapKey);
    117 	if (EFI_ERROR(status)) {
    118 		FreePool(desc);
    119 		desc = efi_memory_get_map(&NoEntries, &MapKey, &DescriptorSize,
    120 		    &DescriptorVersion, true);
    121 		status = uefi_call_wrapper(BS->ExitBootServices, 2, IH, MapKey);
    122 		if (EFI_ERROR(status))
    123 			Panic(L"ExitBootServices failed");
    124 	}
    125 	efi_cleanuped = true;
    126 
    127 	allocsz = sizeof(struct btinfo_efimemmap) - 1
    128 	    + NoEntries * DescriptorSize;
    129 	bim = alloc(allocsz);
    130 	bim->num = NoEntries;
    131 	bim->version = DescriptorVersion;
    132 	bim->size = DescriptorSize;
    133 	memcpy(bim->memmap, desc, NoEntries * DescriptorSize);
    134 	BI_ADD(bim, BTINFO_EFIMEMMAP, allocsz);
    135 }
    136 
    137 static void
    138 efi_heap_init(void)
    139 {
    140 	EFI_STATUS status;
    141 	u_int sz = EFI_SIZE_TO_PAGES(heap_size);
    142 
    143 	status = uefi_call_wrapper(BS->AllocatePages, 4, AllocateMaxAddress,
    144 	    EfiLoaderData, sz, &heap_start);
    145 	if (EFI_ERROR(status))
    146 		Panic(L"%a: AllocatePages() failed: %d page(s): %r",
    147 		    __func__, sz, status);
    148 	setheap((void *)(UINTN)heap_start,
    149 	    (void *)(UINTN)(heap_start + heap_size));
    150 }
    151