diff options
Diffstat (limited to 'grub-core/mmap/mips/uppermem.c')
-rw-r--r-- | grub-core/mmap/mips/uppermem.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/grub-core/mmap/mips/uppermem.c b/grub-core/mmap/mips/uppermem.c new file mode 100644 index 0000000..a980e07 --- /dev/null +++ b/grub-core/mmap/mips/uppermem.c @@ -0,0 +1,72 @@ +/* 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/mm.h> +#include <grub/misc.h> +#include <grub/cpu/memory.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; + if (addr == 0) + *lower = size; + return 0; +} + +grub_uint64_t +grub_mmap_get_lower (void) +{ + grub_uint64_t lower = 0; + + grub_mmap_iterate (lower_hook, &lower); + if (lower > GRUB_ARCH_LOWMEMMAXSIZE) + lower = GRUB_ARCH_LOWMEMMAXSIZE; + 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 <= GRUB_ARCH_HIGHMEMPSTART && addr + size + > GRUB_ARCH_HIGHMEMPSTART) + *upper = addr + size - GRUB_ARCH_HIGHMEMPSTART; + return 0; +} + +grub_uint64_t +grub_mmap_get_upper (void) +{ + grub_uint64_t upper = 0; + + grub_mmap_iterate (upper_hook, &upper); + return upper; +} |