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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:51 +0000 |
commit | 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e (patch) | |
tree | 32451fa3cdd9321fb2591fada9891b2cb70a9cd1 /grub-core/mmap/i386/uppermem.c | |
parent | Initial commit. (diff) | |
download | grub2-6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e.tar.xz grub2-6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e.zip |
Adding upstream version 2.06.upstream/2.06upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | grub-core/mmap/i386/uppermem.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/grub-core/mmap/i386/uppermem.c b/grub-core/mmap/i386/uppermem.c new file mode 100644 index 0000000..a6be989 --- /dev/null +++ b/grub-core/mmap/i386/uppermem.c @@ -0,0 +1,98 @@ +/* Compute amount of lower and upper memory till the first hole. */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2009 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/memory.h> +#include <grub/i386/memory.h> +#include <grub/mm.h> +#include <grub/misc.h> + +/* Helper for grub_mmap_get_lower. */ +static int +lower_hook (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type, + void *data) +{ + grub_uint64_t *lower = data; + + if (type != GRUB_MEMORY_AVAILABLE) + return 0; +#ifdef GRUB_MACHINE_COREBOOT + if (addr <= 0x1000) +#else + if (addr == 0) +#endif + *lower = size + addr; + return 0; +} + +grub_uint64_t +grub_mmap_get_lower (void) +{ + grub_uint64_t lower = 0; + + grub_mmap_iterate (lower_hook, &lower); + if (lower > 0x100000) + lower = 0x100000; + return lower; +} + +/* Helper for grub_mmap_get_upper. */ +static int +upper_hook (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type, + void *data) +{ + grub_uint64_t *upper = data; + + if (type != GRUB_MEMORY_AVAILABLE) + return 0; + if (addr <= 0x100000 && addr + size > 0x100000) + *upper = addr + size - 0x100000; + return 0; +} + +grub_uint64_t +grub_mmap_get_upper (void) +{ + grub_uint64_t upper = 0; + + grub_mmap_iterate (upper_hook, &upper); + return upper; +} + +/* Helper for grub_mmap_get_post64. */ +static int +post64_hook (grub_uint64_t addr, grub_uint64_t size, grub_memory_type_t type, + void *data) +{ + grub_uint64_t *post64 = data; + if (type != GRUB_MEMORY_AVAILABLE) + return 0; + if (addr <= 0x4000000 && addr + size > 0x4000000) + *post64 = addr + size - 0x4000000; + return 0; +} + +/* Count the continuous bytes after 64 MiB. */ +grub_uint64_t +grub_mmap_get_post64 (void) +{ + grub_uint64_t post64 = 0; + + grub_mmap_iterate (post64_hook, &post64); + return post64; +} |