mirror of
https://git.savannah.gnu.org/git/grub.git
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141 lines
3.3 KiB
C
141 lines
3.3 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009,2013 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/kernel.h>
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#include <grub/mm.h>
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#include <grub/memory.h>
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#include <grub/machine/console.h>
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#include <grub/offsets.h>
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#include <grub/types.h>
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#include <grub/err.h>
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#include <grub/dl.h>
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#include <grub/misc.h>
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#include <grub/loader.h>
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#include <grub/env.h>
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#include <grub/cache.h>
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#include <grub/time.h>
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#include <grub/symbol.h>
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#include <grub/video.h>
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extern grub_uint8_t _start[];
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extern grub_uint8_t _end[];
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extern grub_uint8_t _edata[];
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grub_uint64_t
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grub_armv7_get_timer_value(void);
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grub_uint32_t
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grub_armv7_get_timer_frequency(void);
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grub_uint32_t
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grub_arm_pfr1(void);
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void __attribute__ ((noreturn))
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grub_exit (void)
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{
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/* We can't use grub_fatal() in this function. This would create an infinite
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loop, since grub_fatal() calls grub_abort() which in turn calls grub_exit(). */
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while (1)
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grub_cpu_idle ();
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}
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static grub_uint64_t modend;
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static int have_memory = 0;
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/* Helper for grub_machine_init. */
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static int
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heap_init (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type,
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void *data __attribute__ ((unused)))
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{
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grub_uint64_t begin = addr, end = addr + size;
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#if GRUB_CPU_SIZEOF_VOID_P == 4
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/* Restrict ourselves to 32-bit memory space. */
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if (begin > GRUB_ULONG_MAX)
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return 0;
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if (end > GRUB_ULONG_MAX)
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end = GRUB_ULONG_MAX;
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#endif
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if (type != GRUB_MEMORY_AVAILABLE)
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return 0;
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if (modend && begin < modend)
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begin = modend;
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if (end <= begin)
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return 0;
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grub_mm_init_region ((void *) (grub_addr_t) begin, (grub_size_t) (end - begin));
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have_memory = 1;
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return 0;
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}
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static grub_uint32_t timer_frequency_in_khz;
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static grub_uint64_t
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get_time_ms (void)
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{
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return grub_divmod64 (grub_armv7_get_timer_value(), timer_frequency_in_khz, 0);
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}
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static int
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try_generic_timer (void)
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{
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if (((grub_arm_pfr1 () >> 16) & 0xf) != 1)
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return 0;
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timer_frequency_in_khz = grub_armv7_get_timer_frequency() / 1000;
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if (timer_frequency_in_khz == 0)
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return 0;
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grub_install_get_time_ms (get_time_ms);
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return 1;
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}
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void
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grub_machine_init (void)
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{
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modend = grub_modules_get_end ();
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grub_video_coreboot_fb_early_init ();
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grub_machine_mmap_iterate (heap_init, NULL);
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if (!have_memory)
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grub_fatal ("No memory found");
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grub_video_coreboot_fb_late_init ();
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grub_font_init ();
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grub_gfxterm_init ();
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if (!try_generic_timer ())
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grub_fatal ("No timer found");
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}
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void
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grub_machine_get_bootlocation (char **device __attribute__ ((unused)),
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char **path __attribute__ ((unused)))
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{
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}
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void
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grub_machine_fini (int flags __attribute__ ((unused)))
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{
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}
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