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90a2186b7d
Various small cleanups: - Standardize printk messages: 'alloc' => 'allocate' 'mem' => 'memory' also put variable names in printk messages between quotes. - Align mass-assignments vertically for better readability - Break multi-line function prototypes at the name where possible, not in the middle of the parameter list - Use a newline before return statements consistently. - Use curly braces in a balanced fashion. - Remove stray newlines. No change in functionality. Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/20180711094040.12506-2-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
1092 lines
26 KiB
C
1092 lines
26 KiB
C
/* -----------------------------------------------------------------------
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*
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* Copyright 2011 Intel Corporation; author Matt Fleming
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*
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* This file is part of the Linux kernel, and is made available under
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* the terms of the GNU General Public License version 2.
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*
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* ----------------------------------------------------------------------- */
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#include <linux/efi.h>
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#include <linux/pci.h>
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#include <asm/efi.h>
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#include <asm/e820/types.h>
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#include <asm/setup.h>
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#include <asm/desc.h>
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#include "../string.h"
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#include "eboot.h"
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static efi_system_table_t *sys_table;
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static struct efi_config *efi_early;
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__pure const struct efi_config *__efi_early(void)
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{
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return efi_early;
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}
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#define BOOT_SERVICES(bits) \
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static void setup_boot_services##bits(struct efi_config *c) \
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{ \
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efi_system_table_##bits##_t *table; \
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\
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table = (typeof(table))sys_table; \
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\
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c->runtime_services = table->runtime; \
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c->boot_services = table->boottime; \
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c->text_output = table->con_out; \
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}
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BOOT_SERVICES(32);
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BOOT_SERVICES(64);
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static inline efi_status_t __open_volume32(void *__image, void **__fh)
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{
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efi_file_io_interface_t *io;
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efi_loaded_image_32_t *image = __image;
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efi_file_handle_32_t *fh;
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efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
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efi_status_t status;
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void *handle = (void *)(unsigned long)image->device_handle;
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unsigned long func;
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status = efi_call_early(handle_protocol, handle,
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&fs_proto, (void **)&io);
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if (status != EFI_SUCCESS) {
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efi_printk(sys_table, "Failed to handle fs_proto\n");
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return status;
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}
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func = (unsigned long)io->open_volume;
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status = efi_early->call(func, io, &fh);
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if (status != EFI_SUCCESS)
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efi_printk(sys_table, "Failed to open volume\n");
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*__fh = fh;
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return status;
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}
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static inline efi_status_t __open_volume64(void *__image, void **__fh)
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{
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efi_file_io_interface_t *io;
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efi_loaded_image_64_t *image = __image;
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efi_file_handle_64_t *fh;
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efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID;
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efi_status_t status;
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void *handle = (void *)(unsigned long)image->device_handle;
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unsigned long func;
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status = efi_call_early(handle_protocol, handle,
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&fs_proto, (void **)&io);
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if (status != EFI_SUCCESS) {
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efi_printk(sys_table, "Failed to handle fs_proto\n");
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return status;
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}
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func = (unsigned long)io->open_volume;
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status = efi_early->call(func, io, &fh);
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if (status != EFI_SUCCESS)
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efi_printk(sys_table, "Failed to open volume\n");
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*__fh = fh;
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return status;
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}
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efi_status_t
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efi_open_volume(efi_system_table_t *sys_table, void *__image, void **__fh)
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{
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if (efi_early->is64)
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return __open_volume64(__image, __fh);
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return __open_volume32(__image, __fh);
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}
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void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str)
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{
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efi_call_proto(efi_simple_text_output_protocol, output_string,
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efi_early->text_output, str);
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}
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static efi_status_t
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__setup_efi_pci(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom)
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{
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struct pci_setup_rom *rom = NULL;
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efi_status_t status;
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unsigned long size;
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uint64_t romsize;
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void *romimage;
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/*
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* Some firmware images contain EFI function pointers at the place where
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* the romimage and romsize fields are supposed to be. Typically the EFI
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* code is mapped at high addresses, translating to an unrealistically
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* large romsize. The UEFI spec limits the size of option ROMs to 16
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* MiB so we reject any ROMs over 16 MiB in size to catch this.
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*/
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romimage = (void *)(unsigned long)efi_table_attr(efi_pci_io_protocol,
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romimage, pci);
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romsize = efi_table_attr(efi_pci_io_protocol, romsize, pci);
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if (!romimage || !romsize || romsize > SZ_16M)
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return EFI_INVALID_PARAMETER;
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size = romsize + sizeof(*rom);
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status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom);
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if (status != EFI_SUCCESS) {
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efi_printk(sys_table, "Failed to allocate memory for 'rom'\n");
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return status;
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}
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memset(rom, 0, sizeof(*rom));
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rom->data.type = SETUP_PCI;
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rom->data.len = size - sizeof(struct setup_data);
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rom->data.next = 0;
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rom->pcilen = pci->romsize;
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*__rom = rom;
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status = efi_call_proto(efi_pci_io_protocol, pci.read, pci,
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EfiPciIoWidthUint16, PCI_VENDOR_ID, 1,
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&rom->vendor);
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if (status != EFI_SUCCESS) {
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efi_printk(sys_table, "Failed to read rom->vendor\n");
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goto free_struct;
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}
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status = efi_call_proto(efi_pci_io_protocol, pci.read, pci,
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EfiPciIoWidthUint16, PCI_DEVICE_ID, 1,
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&rom->devid);
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if (status != EFI_SUCCESS) {
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efi_printk(sys_table, "Failed to read rom->devid\n");
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goto free_struct;
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}
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status = efi_call_proto(efi_pci_io_protocol, get_location, pci,
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&rom->segment, &rom->bus, &rom->device,
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&rom->function);
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if (status != EFI_SUCCESS)
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goto free_struct;
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memcpy(rom->romdata, romimage, romsize);
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return status;
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free_struct:
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efi_call_early(free_pool, rom);
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return status;
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}
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static void
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setup_efi_pci32(struct boot_params *params, void **pci_handle, unsigned long size)
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{
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efi_pci_io_protocol_t *pci = NULL;
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efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
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u32 *handles = (u32 *)(unsigned long)pci_handle;
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efi_status_t status;
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unsigned long nr_pci;
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struct setup_data *data;
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int i;
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data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
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while (data && data->next)
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data = (struct setup_data *)(unsigned long)data->next;
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nr_pci = size / sizeof(u32);
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for (i = 0; i < nr_pci; i++) {
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struct pci_setup_rom *rom = NULL;
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u32 h = handles[i];
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status = efi_call_early(handle_protocol, h,
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&pci_proto, (void **)&pci);
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if (status != EFI_SUCCESS)
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continue;
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if (!pci)
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continue;
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status = __setup_efi_pci(pci, &rom);
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if (status != EFI_SUCCESS)
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continue;
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if (data)
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data->next = (unsigned long)rom;
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else
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params->hdr.setup_data = (unsigned long)rom;
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data = (struct setup_data *)rom;
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}
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}
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static void
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setup_efi_pci64(struct boot_params *params, void **pci_handle, unsigned long size)
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{
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efi_pci_io_protocol_t *pci = NULL;
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efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
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u64 *handles = (u64 *)(unsigned long)pci_handle;
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efi_status_t status;
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unsigned long nr_pci;
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struct setup_data *data;
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int i;
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data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
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while (data && data->next)
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data = (struct setup_data *)(unsigned long)data->next;
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nr_pci = size / sizeof(u64);
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for (i = 0; i < nr_pci; i++) {
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struct pci_setup_rom *rom = NULL;
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u64 h = handles[i];
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status = efi_call_early(handle_protocol, h,
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&pci_proto, (void **)&pci);
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if (status != EFI_SUCCESS)
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continue;
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if (!pci)
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continue;
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status = __setup_efi_pci(pci, &rom);
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if (status != EFI_SUCCESS)
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continue;
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if (data)
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data->next = (unsigned long)rom;
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else
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params->hdr.setup_data = (unsigned long)rom;
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data = (struct setup_data *)rom;
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}
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}
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/*
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* There's no way to return an informative status from this function,
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* because any analysis (and printing of error messages) needs to be
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* done directly at the EFI function call-site.
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*
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* For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we
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* just didn't find any PCI devices, but there's no way to tell outside
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* the context of the call.
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*/
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static void setup_efi_pci(struct boot_params *params)
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{
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efi_status_t status;
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void **pci_handle = NULL;
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efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID;
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unsigned long size = 0;
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status = efi_call_early(locate_handle,
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EFI_LOCATE_BY_PROTOCOL,
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&pci_proto, NULL, &size, pci_handle);
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if (status == EFI_BUFFER_TOO_SMALL) {
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status = efi_call_early(allocate_pool,
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EFI_LOADER_DATA,
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size, (void **)&pci_handle);
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if (status != EFI_SUCCESS) {
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efi_printk(sys_table, "Failed to allocate memory for 'pci_handle'\n");
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return;
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}
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status = efi_call_early(locate_handle,
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EFI_LOCATE_BY_PROTOCOL, &pci_proto,
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NULL, &size, pci_handle);
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}
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if (status != EFI_SUCCESS)
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goto free_handle;
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if (efi_early->is64)
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setup_efi_pci64(params, pci_handle, size);
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else
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setup_efi_pci32(params, pci_handle, size);
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free_handle:
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efi_call_early(free_pool, pci_handle);
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}
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static void retrieve_apple_device_properties(struct boot_params *boot_params)
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{
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efi_guid_t guid = APPLE_PROPERTIES_PROTOCOL_GUID;
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struct setup_data *data, *new;
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efi_status_t status;
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u32 size = 0;
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void *p;
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status = efi_call_early(locate_protocol, &guid, NULL, &p);
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if (status != EFI_SUCCESS)
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return;
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if (efi_table_attr(apple_properties_protocol, version, p) != 0x10000) {
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efi_printk(sys_table, "Unsupported properties proto version\n");
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return;
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}
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efi_call_proto(apple_properties_protocol, get_all, p, NULL, &size);
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if (!size)
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return;
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do {
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status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
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size + sizeof(struct setup_data), &new);
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if (status != EFI_SUCCESS) {
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efi_printk(sys_table, "Failed to allocate memory for 'properties'\n");
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return;
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}
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status = efi_call_proto(apple_properties_protocol, get_all, p,
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new->data, &size);
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if (status == EFI_BUFFER_TOO_SMALL)
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efi_call_early(free_pool, new);
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} while (status == EFI_BUFFER_TOO_SMALL);
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new->type = SETUP_APPLE_PROPERTIES;
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new->len = size;
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new->next = 0;
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data = (struct setup_data *)(unsigned long)boot_params->hdr.setup_data;
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if (!data) {
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boot_params->hdr.setup_data = (unsigned long)new;
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} else {
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while (data->next)
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data = (struct setup_data *)(unsigned long)data->next;
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data->next = (unsigned long)new;
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}
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}
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static const efi_char16_t apple[] = L"Apple";
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static void setup_quirks(struct boot_params *boot_params)
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{
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efi_char16_t *fw_vendor = (efi_char16_t *)(unsigned long)
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efi_table_attr(efi_system_table, fw_vendor, sys_table);
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if (!memcmp(fw_vendor, apple, sizeof(apple))) {
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if (IS_ENABLED(CONFIG_APPLE_PROPERTIES))
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retrieve_apple_device_properties(boot_params);
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}
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}
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static efi_status_t
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setup_uga32(void **uga_handle, unsigned long size, u32 *width, u32 *height)
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{
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struct efi_uga_draw_protocol *uga = NULL, *first_uga;
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efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
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unsigned long nr_ugas;
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u32 *handles = (u32 *)uga_handle;
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efi_status_t status = EFI_INVALID_PARAMETER;
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int i;
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first_uga = NULL;
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nr_ugas = size / sizeof(u32);
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for (i = 0; i < nr_ugas; i++) {
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efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
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u32 w, h, depth, refresh;
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void *pciio;
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u32 handle = handles[i];
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status = efi_call_early(handle_protocol, handle,
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&uga_proto, (void **)&uga);
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if (status != EFI_SUCCESS)
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continue;
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efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
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status = efi_early->call((unsigned long)uga->get_mode, uga,
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&w, &h, &depth, &refresh);
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if (status == EFI_SUCCESS && (!first_uga || pciio)) {
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*width = w;
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*height = h;
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/*
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* Once we've found a UGA supporting PCIIO,
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* don't bother looking any further.
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*/
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if (pciio)
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break;
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first_uga = uga;
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}
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}
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return status;
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}
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static efi_status_t
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setup_uga64(void **uga_handle, unsigned long size, u32 *width, u32 *height)
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{
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struct efi_uga_draw_protocol *uga = NULL, *first_uga;
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efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
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unsigned long nr_ugas;
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u64 *handles = (u64 *)uga_handle;
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efi_status_t status = EFI_INVALID_PARAMETER;
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int i;
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first_uga = NULL;
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nr_ugas = size / sizeof(u64);
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for (i = 0; i < nr_ugas; i++) {
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efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
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u32 w, h, depth, refresh;
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void *pciio;
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u64 handle = handles[i];
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status = efi_call_early(handle_protocol, handle,
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&uga_proto, (void **)&uga);
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if (status != EFI_SUCCESS)
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continue;
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efi_call_early(handle_protocol, handle, &pciio_proto, &pciio);
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status = efi_early->call((unsigned long)uga->get_mode, uga,
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&w, &h, &depth, &refresh);
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if (status == EFI_SUCCESS && (!first_uga || pciio)) {
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*width = w;
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*height = h;
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|
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/*
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* Once we've found a UGA supporting PCIIO,
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* don't bother looking any further.
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*/
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if (pciio)
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break;
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first_uga = uga;
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}
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}
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|
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return status;
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}
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|
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/*
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|
* See if we have Universal Graphics Adapter (UGA) protocol
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*/
|
|
static efi_status_t
|
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setup_uga(struct screen_info *si, efi_guid_t *uga_proto, unsigned long size)
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{
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efi_status_t status;
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u32 width, height;
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void **uga_handle = NULL;
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status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
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size, (void **)&uga_handle);
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if (status != EFI_SUCCESS)
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return status;
|
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|
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status = efi_call_early(locate_handle,
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EFI_LOCATE_BY_PROTOCOL,
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uga_proto, NULL, &size, uga_handle);
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if (status != EFI_SUCCESS)
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goto free_handle;
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height = 0;
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width = 0;
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if (efi_early->is64)
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status = setup_uga64(uga_handle, size, &width, &height);
|
|
else
|
|
status = setup_uga32(uga_handle, size, &width, &height);
|
|
|
|
if (!width && !height)
|
|
goto free_handle;
|
|
|
|
/* EFI framebuffer */
|
|
si->orig_video_isVGA = VIDEO_TYPE_EFI;
|
|
|
|
si->lfb_depth = 32;
|
|
si->lfb_width = width;
|
|
si->lfb_height = height;
|
|
|
|
si->red_size = 8;
|
|
si->red_pos = 16;
|
|
si->green_size = 8;
|
|
si->green_pos = 8;
|
|
si->blue_size = 8;
|
|
si->blue_pos = 0;
|
|
si->rsvd_size = 8;
|
|
si->rsvd_pos = 24;
|
|
|
|
free_handle:
|
|
efi_call_early(free_pool, uga_handle);
|
|
|
|
return status;
|
|
}
|
|
|
|
void setup_graphics(struct boot_params *boot_params)
|
|
{
|
|
efi_guid_t graphics_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
|
|
struct screen_info *si;
|
|
efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID;
|
|
efi_status_t status;
|
|
unsigned long size;
|
|
void **gop_handle = NULL;
|
|
void **uga_handle = NULL;
|
|
|
|
si = &boot_params->screen_info;
|
|
memset(si, 0, sizeof(*si));
|
|
|
|
size = 0;
|
|
status = efi_call_early(locate_handle,
|
|
EFI_LOCATE_BY_PROTOCOL,
|
|
&graphics_proto, NULL, &size, gop_handle);
|
|
if (status == EFI_BUFFER_TOO_SMALL)
|
|
status = efi_setup_gop(NULL, si, &graphics_proto, size);
|
|
|
|
if (status != EFI_SUCCESS) {
|
|
size = 0;
|
|
status = efi_call_early(locate_handle,
|
|
EFI_LOCATE_BY_PROTOCOL,
|
|
&uga_proto, NULL, &size, uga_handle);
|
|
if (status == EFI_BUFFER_TOO_SMALL)
|
|
setup_uga(si, &uga_proto, size);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Because the x86 boot code expects to be passed a boot_params we
|
|
* need to create one ourselves (usually the bootloader would create
|
|
* one for us).
|
|
*
|
|
* The caller is responsible for filling out ->code32_start in the
|
|
* returned boot_params.
|
|
*/
|
|
struct boot_params *make_boot_params(struct efi_config *c)
|
|
{
|
|
struct boot_params *boot_params;
|
|
struct apm_bios_info *bi;
|
|
struct setup_header *hdr;
|
|
efi_loaded_image_t *image;
|
|
void *options, *handle;
|
|
efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
|
|
int options_size = 0;
|
|
efi_status_t status;
|
|
char *cmdline_ptr;
|
|
u16 *s2;
|
|
u8 *s1;
|
|
int i;
|
|
unsigned long ramdisk_addr;
|
|
unsigned long ramdisk_size;
|
|
|
|
efi_early = c;
|
|
sys_table = (efi_system_table_t *)(unsigned long)efi_early->table;
|
|
handle = (void *)(unsigned long)efi_early->image_handle;
|
|
|
|
/* Check if we were booted by the EFI firmware */
|
|
if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
|
|
return NULL;
|
|
|
|
if (efi_early->is64)
|
|
setup_boot_services64(efi_early);
|
|
else
|
|
setup_boot_services32(efi_early);
|
|
|
|
status = efi_call_early(handle_protocol, handle,
|
|
&proto, (void *)&image);
|
|
if (status != EFI_SUCCESS) {
|
|
efi_printk(sys_table, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
|
|
return NULL;
|
|
}
|
|
|
|
status = efi_low_alloc(sys_table, 0x4000, 1,
|
|
(unsigned long *)&boot_params);
|
|
if (status != EFI_SUCCESS) {
|
|
efi_printk(sys_table, "Failed to allocate lowmem for boot params\n");
|
|
return NULL;
|
|
}
|
|
|
|
memset(boot_params, 0x0, 0x4000);
|
|
|
|
hdr = &boot_params->hdr;
|
|
bi = &boot_params->apm_bios_info;
|
|
|
|
/* Copy the second sector to boot_params */
|
|
memcpy(&hdr->jump, image->image_base + 512, 512);
|
|
|
|
/*
|
|
* Fill out some of the header fields ourselves because the
|
|
* EFI firmware loader doesn't load the first sector.
|
|
*/
|
|
hdr->root_flags = 1;
|
|
hdr->vid_mode = 0xffff;
|
|
hdr->boot_flag = 0xAA55;
|
|
|
|
hdr->type_of_loader = 0x21;
|
|
|
|
/* Convert unicode cmdline to ascii */
|
|
cmdline_ptr = efi_convert_cmdline(sys_table, image, &options_size);
|
|
if (!cmdline_ptr)
|
|
goto fail;
|
|
|
|
hdr->cmd_line_ptr = (unsigned long)cmdline_ptr;
|
|
/* Fill in upper bits of command line address, NOP on 32 bit */
|
|
boot_params->ext_cmd_line_ptr = (u64)(unsigned long)cmdline_ptr >> 32;
|
|
|
|
hdr->ramdisk_image = 0;
|
|
hdr->ramdisk_size = 0;
|
|
|
|
/* Clear APM BIOS info */
|
|
memset(bi, 0, sizeof(*bi));
|
|
|
|
status = efi_parse_options(cmdline_ptr);
|
|
if (status != EFI_SUCCESS)
|
|
goto fail2;
|
|
|
|
status = handle_cmdline_files(sys_table, image,
|
|
(char *)(unsigned long)hdr->cmd_line_ptr,
|
|
"initrd=", hdr->initrd_addr_max,
|
|
&ramdisk_addr, &ramdisk_size);
|
|
|
|
if (status != EFI_SUCCESS &&
|
|
hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G) {
|
|
efi_printk(sys_table, "Trying to load files to higher address\n");
|
|
status = handle_cmdline_files(sys_table, image,
|
|
(char *)(unsigned long)hdr->cmd_line_ptr,
|
|
"initrd=", -1UL,
|
|
&ramdisk_addr, &ramdisk_size);
|
|
}
|
|
|
|
if (status != EFI_SUCCESS)
|
|
goto fail2;
|
|
hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
|
|
hdr->ramdisk_size = ramdisk_size & 0xffffffff;
|
|
boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
|
|
boot_params->ext_ramdisk_size = (u64)ramdisk_size >> 32;
|
|
|
|
return boot_params;
|
|
|
|
fail2:
|
|
efi_free(sys_table, options_size, hdr->cmd_line_ptr);
|
|
fail:
|
|
efi_free(sys_table, 0x4000, (unsigned long)boot_params);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void add_e820ext(struct boot_params *params,
|
|
struct setup_data *e820ext, u32 nr_entries)
|
|
{
|
|
struct setup_data *data;
|
|
efi_status_t status;
|
|
unsigned long size;
|
|
|
|
e820ext->type = SETUP_E820_EXT;
|
|
e820ext->len = nr_entries * sizeof(struct boot_e820_entry);
|
|
e820ext->next = 0;
|
|
|
|
data = (struct setup_data *)(unsigned long)params->hdr.setup_data;
|
|
|
|
while (data && data->next)
|
|
data = (struct setup_data *)(unsigned long)data->next;
|
|
|
|
if (data)
|
|
data->next = (unsigned long)e820ext;
|
|
else
|
|
params->hdr.setup_data = (unsigned long)e820ext;
|
|
}
|
|
|
|
static efi_status_t
|
|
setup_e820(struct boot_params *params, struct setup_data *e820ext, u32 e820ext_size)
|
|
{
|
|
struct boot_e820_entry *entry = params->e820_table;
|
|
struct efi_info *efi = ¶ms->efi_info;
|
|
struct boot_e820_entry *prev = NULL;
|
|
u32 nr_entries;
|
|
u32 nr_desc;
|
|
int i;
|
|
|
|
nr_entries = 0;
|
|
nr_desc = efi->efi_memmap_size / efi->efi_memdesc_size;
|
|
|
|
for (i = 0; i < nr_desc; i++) {
|
|
efi_memory_desc_t *d;
|
|
unsigned int e820_type = 0;
|
|
unsigned long m = efi->efi_memmap;
|
|
|
|
#ifdef CONFIG_X86_64
|
|
m |= (u64)efi->efi_memmap_hi << 32;
|
|
#endif
|
|
|
|
d = efi_early_memdesc_ptr(m, efi->efi_memdesc_size, i);
|
|
switch (d->type) {
|
|
case EFI_RESERVED_TYPE:
|
|
case EFI_RUNTIME_SERVICES_CODE:
|
|
case EFI_RUNTIME_SERVICES_DATA:
|
|
case EFI_MEMORY_MAPPED_IO:
|
|
case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
|
|
case EFI_PAL_CODE:
|
|
e820_type = E820_TYPE_RESERVED;
|
|
break;
|
|
|
|
case EFI_UNUSABLE_MEMORY:
|
|
e820_type = E820_TYPE_UNUSABLE;
|
|
break;
|
|
|
|
case EFI_ACPI_RECLAIM_MEMORY:
|
|
e820_type = E820_TYPE_ACPI;
|
|
break;
|
|
|
|
case EFI_LOADER_CODE:
|
|
case EFI_LOADER_DATA:
|
|
case EFI_BOOT_SERVICES_CODE:
|
|
case EFI_BOOT_SERVICES_DATA:
|
|
case EFI_CONVENTIONAL_MEMORY:
|
|
e820_type = E820_TYPE_RAM;
|
|
break;
|
|
|
|
case EFI_ACPI_MEMORY_NVS:
|
|
e820_type = E820_TYPE_NVS;
|
|
break;
|
|
|
|
case EFI_PERSISTENT_MEMORY:
|
|
e820_type = E820_TYPE_PMEM;
|
|
break;
|
|
|
|
default:
|
|
continue;
|
|
}
|
|
|
|
/* Merge adjacent mappings */
|
|
if (prev && prev->type == e820_type &&
|
|
(prev->addr + prev->size) == d->phys_addr) {
|
|
prev->size += d->num_pages << 12;
|
|
continue;
|
|
}
|
|
|
|
if (nr_entries == ARRAY_SIZE(params->e820_table)) {
|
|
u32 need = (nr_desc - i) * sizeof(struct e820_entry) +
|
|
sizeof(struct setup_data);
|
|
|
|
if (!e820ext || e820ext_size < need)
|
|
return EFI_BUFFER_TOO_SMALL;
|
|
|
|
/* boot_params map full, switch to e820 extended */
|
|
entry = (struct boot_e820_entry *)e820ext->data;
|
|
}
|
|
|
|
entry->addr = d->phys_addr;
|
|
entry->size = d->num_pages << PAGE_SHIFT;
|
|
entry->type = e820_type;
|
|
prev = entry++;
|
|
nr_entries++;
|
|
}
|
|
|
|
if (nr_entries > ARRAY_SIZE(params->e820_table)) {
|
|
u32 nr_e820ext = nr_entries - ARRAY_SIZE(params->e820_table);
|
|
|
|
add_e820ext(params, e820ext, nr_e820ext);
|
|
nr_entries -= nr_e820ext;
|
|
}
|
|
|
|
params->e820_entries = (u8)nr_entries;
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
|
|
u32 *e820ext_size)
|
|
{
|
|
efi_status_t status;
|
|
unsigned long size;
|
|
|
|
size = sizeof(struct setup_data) +
|
|
sizeof(struct e820_entry) * nr_desc;
|
|
|
|
if (*e820ext) {
|
|
efi_call_early(free_pool, *e820ext);
|
|
*e820ext = NULL;
|
|
*e820ext_size = 0;
|
|
}
|
|
|
|
status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
|
|
size, (void **)e820ext);
|
|
if (status == EFI_SUCCESS)
|
|
*e820ext_size = size;
|
|
|
|
return status;
|
|
}
|
|
|
|
struct exit_boot_struct {
|
|
struct boot_params *boot_params;
|
|
struct efi_info *efi;
|
|
struct setup_data *e820ext;
|
|
__u32 e820ext_size;
|
|
bool is64;
|
|
};
|
|
|
|
static efi_status_t exit_boot_func(efi_system_table_t *sys_table_arg,
|
|
struct efi_boot_memmap *map,
|
|
void *priv)
|
|
{
|
|
static bool first = true;
|
|
const char *signature;
|
|
__u32 nr_desc;
|
|
efi_status_t status;
|
|
struct exit_boot_struct *p = priv;
|
|
|
|
if (first) {
|
|
nr_desc = *map->buff_size / *map->desc_size;
|
|
if (nr_desc > ARRAY_SIZE(p->boot_params->e820_table)) {
|
|
u32 nr_e820ext = nr_desc -
|
|
ARRAY_SIZE(p->boot_params->e820_table);
|
|
|
|
status = alloc_e820ext(nr_e820ext, &p->e820ext,
|
|
&p->e820ext_size);
|
|
if (status != EFI_SUCCESS)
|
|
return status;
|
|
}
|
|
first = false;
|
|
}
|
|
|
|
signature = p->is64 ? EFI64_LOADER_SIGNATURE : EFI32_LOADER_SIGNATURE;
|
|
memcpy(&p->efi->efi_loader_signature, signature, sizeof(__u32));
|
|
|
|
p->efi->efi_systab = (unsigned long)sys_table_arg;
|
|
p->efi->efi_memdesc_size = *map->desc_size;
|
|
p->efi->efi_memdesc_version = *map->desc_ver;
|
|
p->efi->efi_memmap = (unsigned long)*map->map;
|
|
p->efi->efi_memmap_size = *map->map_size;
|
|
|
|
#ifdef CONFIG_X86_64
|
|
p->efi->efi_systab_hi = (unsigned long)sys_table_arg >> 32;
|
|
p->efi->efi_memmap_hi = (unsigned long)*map->map >> 32;
|
|
#endif
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
static efi_status_t exit_boot(struct boot_params *boot_params,
|
|
void *handle, bool is64)
|
|
{
|
|
unsigned long map_sz, key, desc_size, buff_size;
|
|
efi_memory_desc_t *mem_map;
|
|
struct setup_data *e820ext;
|
|
__u32 e820ext_size;
|
|
efi_status_t status;
|
|
__u32 desc_version;
|
|
struct efi_boot_memmap map;
|
|
struct exit_boot_struct priv;
|
|
|
|
map.map = &mem_map;
|
|
map.map_size = &map_sz;
|
|
map.desc_size = &desc_size;
|
|
map.desc_ver = &desc_version;
|
|
map.key_ptr = &key;
|
|
map.buff_size = &buff_size;
|
|
priv.boot_params = boot_params;
|
|
priv.efi = &boot_params->efi_info;
|
|
priv.e820ext = NULL;
|
|
priv.e820ext_size = 0;
|
|
priv.is64 = is64;
|
|
|
|
/* Might as well exit boot services now */
|
|
status = efi_exit_boot_services(sys_table, handle, &map, &priv,
|
|
exit_boot_func);
|
|
if (status != EFI_SUCCESS)
|
|
return status;
|
|
|
|
e820ext = priv.e820ext;
|
|
e820ext_size = priv.e820ext_size;
|
|
|
|
/* Historic? */
|
|
boot_params->alt_mem_k = 32 * 1024;
|
|
|
|
status = setup_e820(boot_params, e820ext, e820ext_size);
|
|
if (status != EFI_SUCCESS)
|
|
return status;
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* On success we return a pointer to a boot_params structure, and NULL
|
|
* on failure.
|
|
*/
|
|
struct boot_params *
|
|
efi_main(struct efi_config *c, struct boot_params *boot_params)
|
|
{
|
|
struct desc_ptr *gdt = NULL;
|
|
efi_loaded_image_t *image;
|
|
struct setup_header *hdr = &boot_params->hdr;
|
|
efi_status_t status;
|
|
struct desc_struct *desc;
|
|
void *handle;
|
|
efi_system_table_t *_table;
|
|
bool is64;
|
|
|
|
efi_early = c;
|
|
|
|
_table = (efi_system_table_t *)(unsigned long)efi_early->table;
|
|
handle = (void *)(unsigned long)efi_early->image_handle;
|
|
is64 = efi_early->is64;
|
|
|
|
sys_table = _table;
|
|
|
|
/* Check if we were booted by the EFI firmware */
|
|
if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
|
|
goto fail;
|
|
|
|
if (is64)
|
|
setup_boot_services64(efi_early);
|
|
else
|
|
setup_boot_services32(efi_early);
|
|
|
|
/*
|
|
* If the boot loader gave us a value for secure_boot then we use that,
|
|
* otherwise we ask the BIOS.
|
|
*/
|
|
if (boot_params->secure_boot == efi_secureboot_mode_unset)
|
|
boot_params->secure_boot = efi_get_secureboot(sys_table);
|
|
|
|
/* Ask the firmware to clear memory on unclean shutdown */
|
|
efi_enable_reset_attack_mitigation(sys_table);
|
|
efi_retrieve_tpm2_eventlog(sys_table);
|
|
|
|
setup_graphics(boot_params);
|
|
|
|
setup_efi_pci(boot_params);
|
|
|
|
setup_quirks(boot_params);
|
|
|
|
status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
|
|
sizeof(*gdt), (void **)&gdt);
|
|
if (status != EFI_SUCCESS) {
|
|
efi_printk(sys_table, "Failed to allocate memory for 'gdt' structure\n");
|
|
goto fail;
|
|
}
|
|
|
|
gdt->size = 0x800;
|
|
status = efi_low_alloc(sys_table, gdt->size, 8,
|
|
(unsigned long *)&gdt->address);
|
|
if (status != EFI_SUCCESS) {
|
|
efi_printk(sys_table, "Failed to allocate memory for 'gdt'\n");
|
|
goto fail;
|
|
}
|
|
|
|
/*
|
|
* If the kernel isn't already loaded at the preferred load
|
|
* address, relocate it.
|
|
*/
|
|
if (hdr->pref_address != hdr->code32_start) {
|
|
unsigned long bzimage_addr = hdr->code32_start;
|
|
status = efi_relocate_kernel(sys_table, &bzimage_addr,
|
|
hdr->init_size, hdr->init_size,
|
|
hdr->pref_address,
|
|
hdr->kernel_alignment);
|
|
if (status != EFI_SUCCESS) {
|
|
efi_printk(sys_table, "efi_relocate_kernel() failed!\n");
|
|
goto fail;
|
|
}
|
|
|
|
hdr->pref_address = hdr->code32_start;
|
|
hdr->code32_start = bzimage_addr;
|
|
}
|
|
|
|
status = exit_boot(boot_params, handle, is64);
|
|
if (status != EFI_SUCCESS) {
|
|
efi_printk(sys_table, "exit_boot() failed!\n");
|
|
goto fail;
|
|
}
|
|
|
|
memset((char *)gdt->address, 0x0, gdt->size);
|
|
desc = (struct desc_struct *)gdt->address;
|
|
|
|
/* The first GDT is a dummy. */
|
|
desc++;
|
|
|
|
if (IS_ENABLED(CONFIG_X86_64)) {
|
|
/* __KERNEL32_CS */
|
|
desc->limit0 = 0xffff;
|
|
desc->base0 = 0x0000;
|
|
desc->base1 = 0x0000;
|
|
desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
|
|
desc->s = DESC_TYPE_CODE_DATA;
|
|
desc->dpl = 0;
|
|
desc->p = 1;
|
|
desc->limit1 = 0xf;
|
|
desc->avl = 0;
|
|
desc->l = 0;
|
|
desc->d = SEG_OP_SIZE_32BIT;
|
|
desc->g = SEG_GRANULARITY_4KB;
|
|
desc->base2 = 0x00;
|
|
|
|
desc++;
|
|
} else {
|
|
/* Second entry is unused on 32-bit */
|
|
desc++;
|
|
}
|
|
|
|
/* __KERNEL_CS */
|
|
desc->limit0 = 0xffff;
|
|
desc->base0 = 0x0000;
|
|
desc->base1 = 0x0000;
|
|
desc->type = SEG_TYPE_CODE | SEG_TYPE_EXEC_READ;
|
|
desc->s = DESC_TYPE_CODE_DATA;
|
|
desc->dpl = 0;
|
|
desc->p = 1;
|
|
desc->limit1 = 0xf;
|
|
desc->avl = 0;
|
|
|
|
if (IS_ENABLED(CONFIG_X86_64)) {
|
|
desc->l = 1;
|
|
desc->d = 0;
|
|
} else {
|
|
desc->l = 0;
|
|
desc->d = SEG_OP_SIZE_32BIT;
|
|
}
|
|
desc->g = SEG_GRANULARITY_4KB;
|
|
desc->base2 = 0x00;
|
|
desc++;
|
|
|
|
/* __KERNEL_DS */
|
|
desc->limit0 = 0xffff;
|
|
desc->base0 = 0x0000;
|
|
desc->base1 = 0x0000;
|
|
desc->type = SEG_TYPE_DATA | SEG_TYPE_READ_WRITE;
|
|
desc->s = DESC_TYPE_CODE_DATA;
|
|
desc->dpl = 0;
|
|
desc->p = 1;
|
|
desc->limit1 = 0xf;
|
|
desc->avl = 0;
|
|
desc->l = 0;
|
|
desc->d = SEG_OP_SIZE_32BIT;
|
|
desc->g = SEG_GRANULARITY_4KB;
|
|
desc->base2 = 0x00;
|
|
desc++;
|
|
|
|
if (IS_ENABLED(CONFIG_X86_64)) {
|
|
/* Task segment value */
|
|
desc->limit0 = 0x0000;
|
|
desc->base0 = 0x0000;
|
|
desc->base1 = 0x0000;
|
|
desc->type = SEG_TYPE_TSS;
|
|
desc->s = 0;
|
|
desc->dpl = 0;
|
|
desc->p = 1;
|
|
desc->limit1 = 0x0;
|
|
desc->avl = 0;
|
|
desc->l = 0;
|
|
desc->d = 0;
|
|
desc->g = SEG_GRANULARITY_4KB;
|
|
desc->base2 = 0x00;
|
|
desc++;
|
|
}
|
|
|
|
asm volatile("cli");
|
|
asm volatile ("lgdt %0" : : "m" (*gdt));
|
|
|
|
return boot_params;
|
|
fail:
|
|
efi_printk(sys_table, "efi_main() failed!\n");
|
|
|
|
return NULL;
|
|
}
|