Ok!
Mike Kelly, le sam. 26 sept. 2026 23:28:44 +0100, a ecrit:
> ---
> i386/i386at/biosmem.c | 71 ++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 70 insertions(+), 1 deletion(-)
>
> diff --git a/i386/i386at/biosmem.c b/i386/i386at/biosmem.c
> index 0e87ce08..6c659044 100644
> --- a/i386/i386at/biosmem.c
> +++ b/i386/i386at/biosmem.c
> @@ -811,7 +811,76 @@ biosmem_mb1_bootstrap(const struct multiboot_raw_info
> *mbi)
> void __boot
> biosmem_mb2_bootstrap(const struct multiboot2_raw_info* mbi)
> {
> - (void)mbi;
> + const struct multiboot2_tag_basic_meminfo *bi_tag = NULL;
> + uint32_t tags_len = mbi->total_size;
> + uint32_t offset = 0;
> +
> + tags_len -= offsetof(struct multiboot2_raw_info, content);
> +
> + biosmem_map_size = 0;
> +
> + while (offset < tags_len)
> + {
> + struct multiboot2_tag *tag =
> + (struct multiboot2_tag *)(mbi->content + offset);
> +
> + switch (tag->type)
> + {
> + case MULTIBOOT2_TAG_TYPE_MMAP:
> + {
> + const struct multiboot2_tag_mmap *mmap_tag =
> + (const struct multiboot2_tag_mmap *)tag;
> +
> + const uint8_t* entries = (const uint8_t*)mmap_tag->entries;
> + uint32_t entries_len = mmap_tag->size
> + - offsetof(struct multiboot2_tag_mmap, entries);
> +
> + struct biosmem_map_entry *bm_start, *bm_entry, *bm_end;
> + bm_start = biosmem_map;
> + bm_entry = bm_start;
> + bm_end = bm_entry + BIOSMEM_MAX_MAP_SIZE;
> +
> + while (entries_len >= mmap_tag->entry_size &&
> + bm_entry < bm_end)
> + {
> + const multiboot2_memory_map_t *mb_entry =
> + (const multiboot2_memory_map_t *)entries;
> +
> + bm_entry->base_addr = mb_entry->addr;
> + bm_entry->length = mb_entry->len;
> + bm_entry->type = mb_entry->type;
> + entries += mmap_tag->entry_size;
> + entries_len -= mmap_tag->entry_size;
> +
> + biosmem_map_adjust_alignment(bm_entry);
> + bm_entry++;
> + }
> +
> + biosmem_map_size = bm_entry - bm_start;
> + }
> + break;
> +
> + case MULTIBOOT2_TAG_TYPE_BASIC_MEMINFO:
> + {
> + bi_tag = (const struct multiboot2_tag_basic_meminfo *)tag;
> + }
> + break;
> +
> + default:
> + break;
> + }
> +
> + offset += MULTIBOOT2_NEXT_TAG_OFFSET(tag->size);
> + }
> +
> + if (bi_tag == NULL)
> + panic("No basic memory information configuration");
> +
> + if (biosmem_map_size == 0)
> + biosmem_map_build_simple(bi_tag->mem_lower, bi_tag->mem_upper);
> +
> + biosmem_bootstrap_common();
> + biosmem_setup_allocator(bi_tag->mem_upper);
> }
>
> #endif /* MACH_HYP */
> --
> 2.47.3
>
>
--
Samuel
j'etais en train de nettoyer ma souris et le coup est parti...
-+- s sur #ens-mim - et en plus c vrai... -+-
