From 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:29:51 +0200 Subject: Adding upstream version 2.06. Signed-off-by: Daniel Baumann --- grub-core/kern/i386/efi/init.c | 48 +++++++++++++++++++++++++++++++++++++++ grub-core/kern/i386/efi/startup.S | 36 +++++++++++++++++++++++++++++ grub-core/kern/i386/efi/tsc.c | 40 ++++++++++++++++++++++++++++++++ 3 files changed, 124 insertions(+) create mode 100644 grub-core/kern/i386/efi/init.c create mode 100644 grub-core/kern/i386/efi/startup.S create mode 100644 grub-core/kern/i386/efi/tsc.c (limited to 'grub-core/kern/i386/efi') diff --git a/grub-core/kern/i386/efi/init.c b/grub-core/kern/i386/efi/init.c new file mode 100644 index 0000000..46476e2 --- /dev/null +++ b/grub-core/kern/i386/efi/init.c @@ -0,0 +1,48 @@ +/* init.c - initialize an x86-based EFI system */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2006,2007 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +void +grub_machine_init (void) +{ + grub_efi_init (); + grub_tsc_init (); +} + +void +grub_machine_fini (int flags) +{ + if (!(flags & GRUB_LOADER_FLAG_NORETURN)) + return; + + grub_efi_fini (); + + if (!(flags & GRUB_LOADER_FLAG_EFI_KEEP_ALLOCATED_MEMORY)) + grub_efi_memory_fini (); +} diff --git a/grub-core/kern/i386/efi/startup.S b/grub-core/kern/i386/efi/startup.S new file mode 100644 index 0000000..fc5ea3d --- /dev/null +++ b/grub-core/kern/i386/efi/startup.S @@ -0,0 +1,36 @@ +/* startup.S - bootstrap GRUB itself */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2006,2007,2010 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#include +#include + + .file "startup.S" + .text + .globl start, _start +start: +_start: + /* + * EFI_SYSTEM_TABLE * and EFI_HANDLE are passed on the stack. + */ + movl 4(%esp), %eax + movl %eax, EXT_C(grub_efi_image_handle) + movl 8(%esp), %eax + movl %eax, EXT_C(grub_efi_system_table) + call EXT_C(grub_main) + ret diff --git a/grub-core/kern/i386/efi/tsc.c b/grub-core/kern/i386/efi/tsc.c new file mode 100644 index 0000000..4b93ba8 --- /dev/null +++ b/grub-core/kern/i386/efi/tsc.c @@ -0,0 +1,40 @@ +/* kern/i386/tsc.c - x86 TSC time source implementation + * Requires Pentium or better x86 CPU that supports the RDTSC instruction. + * This module uses the PIT to calibrate the TSC to + * real time. + * + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2008 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#include +#include +#include +#include +#include +#include + +int +grub_tsc_calibrate_from_efi (void) +{ + grub_uint64_t start_tsc, end_tsc; + /* Use EFI Time Service to calibrate TSC */ + start_tsc = grub_get_tsc (); + efi_call_1 (grub_efi_system_table->boot_services->stall, 1000); + end_tsc = grub_get_tsc (); + grub_tsc_rate = grub_divmod64 ((1ULL << 32), end_tsc - start_tsc, 0); + return 1; +} -- cgit v1.2.3