140 lines
4.1 KiB
C
140 lines
4.1 KiB
C
/*-
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* Copyright (c) 2004, 2006 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stand.h>
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#include <efi.h>
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#include <efilib.h>
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#include <libi386.h>
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#include <machine/bootinfo.h>
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#define EFI_INTEL_FPSWA \
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{0xc41b6531,0x97b9,0x11d3,{0x9a,0x29,0x00,0x90,0x27,0x3f,0xc1,0x4d}}
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static EFI_GUID fpswa_guid = EFI_INTEL_FPSWA;
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/* DIG64 Headless Console & Debug Port Table. */
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#define HCDP_TABLE_GUID \
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{0xf951938d,0x620b,0x42ef,{0x82,0x79,0xa8,0x4b,0x79,0x61,0x78,0x98}}
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static EFI_GUID hcdp_guid = HCDP_TABLE_GUID;
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static UINTN mapkey;
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uint64_t
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ldr_alloc(vm_offset_t va)
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{
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return (0);
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}
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int
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ldr_bootinfo(struct bootinfo *bi, uint64_t *bi_addr)
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{
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VOID *fpswa;
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EFI_MEMORY_DESCRIPTOR *mm;
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EFI_PHYSICAL_ADDRESS addr;
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EFI_HANDLE handle;
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EFI_STATUS status;
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size_t bisz;
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UINTN mmsz, pages, sz;
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UINT32 mmver;
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bi->bi_systab = (uint64_t)ST;
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bi->bi_hcdp = (uint64_t)efi_get_table(&hcdp_guid);
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sz = sizeof(EFI_HANDLE);
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status = BS->LocateHandle(ByProtocol, &fpswa_guid, 0, &sz, &handle);
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if (status == 0)
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status = BS->HandleProtocol(handle, &fpswa_guid, &fpswa);
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bi->bi_fpswa = (status == 0) ? (uint64_t)fpswa : 0;
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bisz = (sizeof(struct bootinfo) + 0x0f) & ~0x0f;
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/*
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* Allocate enough pages to hold the bootinfo block and the memory
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* map EFI will return to us. The memory map has an unknown size,
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* so we have to determine that first. Note that the AllocatePages
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* call can itself modify the memory map, so we have to take that
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* into account as well. The changes to the memory map are caused
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* by splitting a range of free memory into two (AFAICT), so that
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* one is marked as being loader data.
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*/
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sz = 0;
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BS->GetMemoryMap(&sz, NULL, &mapkey, &mmsz, &mmver);
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sz += mmsz;
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sz = (sz + 15) & ~15;
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pages = EFI_SIZE_TO_PAGES(sz + bisz);
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status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData, pages,
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&addr);
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if (EFI_ERROR(status)) {
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printf("%s: AllocatePages() returned 0x%lx\n", __func__,
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(long)status);
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return (ENOMEM);
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}
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/*
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* Read the memory map and stash it after bootinfo. Align the
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* memory map on a 16-byte boundary (the bootinfo block is page
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* aligned).
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*/
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*bi_addr = addr;
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mm = (void *)(addr + bisz);
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sz = (EFI_PAGE_SIZE * pages) - bisz;
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status = BS->GetMemoryMap(&sz, mm, &mapkey, &mmsz, &mmver);
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if (EFI_ERROR(status)) {
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printf("%s: GetMemoryMap() returned 0x%lx\n", __func__,
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(long)status);
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return (EINVAL);
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}
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bi->bi_memmap = (uint64_t)mm;
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bi->bi_memmap_size = sz;
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bi->bi_memdesc_size = mmsz;
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bi->bi_memdesc_version = mmver;
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bcopy(bi, (void *)(*bi_addr), sizeof(*bi));
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return (0);
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}
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int
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ldr_enter(const char *kernel)
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{
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EFI_STATUS status;
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status = BS->ExitBootServices(IH, mapkey);
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if (EFI_ERROR(status)) {
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printf("%s: ExitBootServices() returned 0x%lx\n", __func__,
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(long)status);
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return (EINVAL);
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}
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return (0);
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}
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