summaryrefslogtreecommitdiffstats
path: root/grub-core/kern/i386/coreboot
diff options
context:
space:
mode:
Diffstat (limited to 'grub-core/kern/i386/coreboot')
-rw-r--r--grub-core/kern/i386/coreboot/cbtable.c44
-rw-r--r--grub-core/kern/i386/coreboot/init.c143
-rw-r--r--grub-core/kern/i386/coreboot/startup.S62
3 files changed, 249 insertions, 0 deletions
diff --git a/grub-core/kern/i386/coreboot/cbtable.c b/grub-core/kern/i386/coreboot/cbtable.c
new file mode 100644
index 0000000..34a2b59
--- /dev/null
+++ b/grub-core/kern/i386/coreboot/cbtable.c
@@ -0,0 +1,44 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2007,2008,2013 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/i386/coreboot/memory.h>
+#include <grub/coreboot/lbio.h>
+#include <grub/types.h>
+#include <grub/err.h>
+#include <grub/misc.h>
+#include <grub/dl.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+grub_linuxbios_table_header_t
+grub_linuxbios_get_tables (void)
+{
+ grub_linuxbios_table_header_t table_header;
+ /* Assuming table_header is aligned to its size (8 bytes). */
+ for (table_header = (grub_linuxbios_table_header_t) 0x500;
+ table_header < (grub_linuxbios_table_header_t) 0x1000; table_header++)
+ if (grub_linuxbios_check_signature (table_header))
+ return table_header;
+
+ for (table_header = (grub_linuxbios_table_header_t) 0xf0000;
+ table_header < (grub_linuxbios_table_header_t) 0x100000; table_header++)
+ if (grub_linuxbios_check_signature (table_header))
+ return table_header;
+
+ return 0;
+}
diff --git a/grub-core/kern/i386/coreboot/init.c b/grub-core/kern/i386/coreboot/init.c
new file mode 100644
index 0000000..3314f02
--- /dev/null
+++ b/grub-core/kern/i386/coreboot/init.c
@@ -0,0 +1,143 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009,2013 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/kernel.h>
+#include <grub/mm.h>
+#include <grub/machine/time.h>
+#include <grub/machine/memory.h>
+#include <grub/machine/console.h>
+#include <grub/offsets.h>
+#include <grub/types.h>
+#include <grub/err.h>
+#include <grub/dl.h>
+#include <grub/misc.h>
+#include <grub/loader.h>
+#include <grub/env.h>
+#include <grub/cache.h>
+#include <grub/time.h>
+#include <grub/symbol.h>
+#include <grub/cpu/io.h>
+#include <grub/cpu/floppy.h>
+#include <grub/cpu/tsc.h>
+#include <grub/video.h>
+
+extern grub_uint8_t _start[];
+extern grub_uint8_t _end[];
+extern grub_uint8_t _edata[];
+
+void __attribute__ ((noreturn))
+grub_exit (void)
+{
+ /* We can't use grub_fatal() in this function. This would create an infinite
+ loop, since grub_fatal() calls grub_abort() which in turn calls grub_exit(). */
+ while (1)
+ grub_cpu_idle ();
+}
+
+grub_addr_t grub_modbase = GRUB_KERNEL_I386_COREBOOT_MODULES_ADDR;
+static grub_uint64_t modend;
+static int have_memory = 0;
+
+/* Helper for grub_machine_init. */
+static int
+heap_init (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type,
+ void *data __attribute__ ((unused)))
+{
+ grub_uint64_t begin = addr, end = addr + size;
+
+#if GRUB_CPU_SIZEOF_VOID_P == 4
+ /* Restrict ourselves to 32-bit memory space. */
+ if (begin > GRUB_ULONG_MAX)
+ return 0;
+ if (end > GRUB_ULONG_MAX)
+ end = GRUB_ULONG_MAX;
+#endif
+
+ if (type != GRUB_MEMORY_AVAILABLE)
+ return 0;
+
+ /* Avoid the lower memory. */
+ if (begin < GRUB_MEMORY_MACHINE_LOWER_SIZE)
+ begin = GRUB_MEMORY_MACHINE_LOWER_SIZE;
+
+ if (modend && begin < modend)
+ begin = modend;
+
+ if (end <= begin)
+ return 0;
+
+ grub_mm_init_region ((void *) (grub_addr_t) begin, (grub_size_t) (end - begin));
+
+ have_memory = 1;
+
+ return 0;
+}
+
+#ifndef GRUB_MACHINE_MULTIBOOT
+
+void
+grub_machine_init (void)
+{
+ modend = grub_modules_get_end ();
+
+ grub_video_coreboot_fb_early_init ();
+
+ grub_vga_text_init ();
+
+ grub_machine_mmap_iterate (heap_init, NULL);
+ if (!have_memory)
+ grub_fatal ("No memory found");
+
+ grub_video_coreboot_fb_late_init ();
+
+ grub_font_init ();
+ grub_gfxterm_init ();
+
+ grub_tsc_init ();
+}
+
+#else
+
+void
+grub_machine_init (void)
+{
+ modend = grub_modules_get_end ();
+
+ grub_vga_text_init ();
+
+ grub_machine_mmap_init ();
+ grub_machine_mmap_iterate (heap_init, NULL);
+
+ grub_tsc_init ();
+}
+
+#endif
+
+void
+grub_machine_get_bootlocation (char **device __attribute__ ((unused)),
+ char **path __attribute__ ((unused)))
+{
+}
+
+void
+grub_machine_fini (int flags)
+{
+ if (flags & GRUB_LOADER_FLAG_NORETURN)
+ grub_vga_text_fini ();
+ grub_stop_floppy ();
+}
diff --git a/grub-core/kern/i386/coreboot/startup.S b/grub-core/kern/i386/coreboot/startup.S
new file mode 100644
index 0000000..df6adba
--- /dev/null
+++ b/grub-core/kern/i386/coreboot/startup.S
@@ -0,0 +1,62 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/symbol.h>
+#include <grub/machine/memory.h>
+#include <grub/offsets.h>
+#include <multiboot.h>
+#include <multiboot2.h>
+
+/*
+ * Note: GRUB is compiled with the options -mrtd and -mregparm=3.
+ * So the first three arguments are passed in %eax, %edx, and %ecx,
+ * respectively, and if a function has a fixed number of arguments
+ * and the number if greater than three, the function must return
+ * with "ret $N" where N is ((the number of arguments) - 3) * 4.
+ */
+
+ .file "startup.S"
+ .text
+ .globl start, _start
+start:
+_start:
+#ifdef GRUB_MACHINE_MULTIBOOT
+ cmpl $MULTIBOOT_BOOTLOADER_MAGIC, %eax
+ jne 0f
+ movl %ebx, EXT_C(startup_multiboot_info)
+0:
+#endif
+
+ /* initialize the stack */
+ movl $GRUB_MEMORY_MACHINE_PROT_STACK, %esp
+
+ /* jump to the main body of C code */
+ jmp EXT_C(grub_main)
+
+/*
+ * Support for booting GRUB from a Multiboot boot loader (e.g. GRUB itself).
+ */
+ .p2align 2 /* force 4-byte alignment */
+multiboot_header:
+ /* magic */
+ .long 0x1BADB002
+ /* flags */
+ .long MULTIBOOT_MEMORY_INFO
+ /* checksum */
+ .long -0x1BADB002 - MULTIBOOT_MEMORY_INFO
+