Add ARM64 versions of the mmap functions to generate memory map for multiboot2
Signed-off-by: Chris Plant <ch...@monkeyircd.org> --- grub-core/mmap/arm64/uppermem.c | 72 +++++++++++++++++++++++++++++++++ include/grub/arm64/memory.h | 60 +++++++++++++++++++++++++++ 2 files changed, 132 insertions(+) create mode 100644 grub-core/mmap/arm64/uppermem.c create mode 100644 include/grub/arm64/memory.h diff --git a/grub-core/mmap/arm64/uppermem.c b/grub- core/mmap/arm64/uppermem.c new file mode 100644 index 000000000..a980e0719 --- /dev/null +++ b/grub-core/mmap/arm64/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; +} diff --git a/include/grub/arm64/memory.h b/include/grub/arm64/memory.h new file mode 100644 index 000000000..7811f3449 --- /dev/null +++ b/include/grub/arm64/memory.h @@ -0,0 +1,60 @@ +/* + * 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/>;. + */ + +#ifndef GRUB_MEMORY_CPU_HEADER +#define GRUB_MEMORY_CPU_HEADER 1 + +#ifndef ASM_FILE +#include <grub/symbol.h> +#include <grub/err.h> +#include <grub/types.h> +#endif + +#define GRUB_ARCH_LOWMEMVSTART 0x80000000 +#define GRUB_ARCH_LOWMEMPSTART 0x00000000 +#define GRUB_ARCH_LOWMEMMAXSIZE 0x10000000 +#define GRUB_ARCH_HIGHMEMPSTART 0x10000000 + +#ifndef ASM_FILE + +typedef grub_addr_t grub_phys_addr_t; + +static inline grub_phys_addr_t +grub_vtop (void *a) +{ + return (grub_phys_addr_t) a; +} + +static inline void * +grub_map_memory (grub_phys_addr_t a, grub_size_t size __attribute__ ((unused))) +{ + return (void *) a; +} + +static inline void +grub_unmap_memory (void *a __attribute__ ((unused)), + grub_size_t size __attribute__ ((unused))) +{ +} + +grub_uint64_t grub_mmap_get_lower (void); +grub_uint64_t grub_mmap_get_upper (void); + +#endif + +#endif -- 2.28.0 _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
