diff options
| -rw-r--r-- | stand/efi/include/efilib.h | 1 | ||||
| -rw-r--r-- | stand/efi/libefi/efipart.c | 44 |
2 files changed, 45 insertions, 0 deletions
diff --git a/stand/efi/include/efilib.h b/stand/efi/include/efilib.h index a387c808fe64..96de2a6344a2 100644 --- a/stand/efi/include/efilib.h +++ b/stand/efi/include/efilib.h @@ -68,6 +68,7 @@ pdinfo_list_t *efiblk_get_pdinfo_list(struct devsw *dev); pdinfo_t *efiblk_get_pdinfo(struct devdesc *dev); pdinfo_t *efiblk_get_pdinfo_by_handle(EFI_HANDLE h); pdinfo_t *efiblk_get_pdinfo_by_device_path(EFI_DEVICE_PATH *path); +void efiblk_memdisk_preload(void); /* libefi.c */ void *efi_get_table(EFI_GUID *tbl); diff --git a/stand/efi/libefi/efipart.c b/stand/efi/libefi/efipart.c index c61a7fce2a47..e02993064d26 100644 --- a/stand/efi/libefi/efipart.c +++ b/stand/efi/libefi/efipart.c @@ -1250,3 +1250,47 @@ error: free(blkbuf); return (rc); } + +/* + * Predicate: is this a VirtualDisk as far as UEFI is concerned? + */ +static bool +testmd(pdinfo_t *hd, pdinfo_t *data __unused) +{ + EFI_DEVICE_PATH *node; + + node = efi_devpath_last_node(hd->pd_devpath); + if (node == NULL) + return (false); + if (DevicePathType(node) == MEDIA_DEVICE_PATH && + DevicePathSubType(node) == MEDIA_RAM_DISK_DP) + return (true); + + return (false); +} + +/* + * Passes all the VirtualDisk instances to FreeBSD as a preloaded memory disk. + */ +void +efiblk_memdisk_preload(void) +{ + MEDIA_RAM_DISK_DEVICE_PATH *ram; + uint64_t start, end; + pdinfo_t *md; + char key[32], value[32]; + int i; + + while ((md = efipart_get_pd(&pdinfo, testmd, NULL)) != NULL) { + ram = (MEDIA_RAM_DISK_DEVICE_PATH *)efi_devpath_last_node(md->pd_devpath); + i = ram->Instance; + start = ((uint64_t)ram->StartingAddr[1] << 32) | ram->StartingAddr[0]; + end = ((uint64_t)ram->EndingAddr[1] << 32) | ram->EndingAddr[0]; + snprintf(key, sizeof(key), "hint.md.%d.physaddr", i); + snprintf(value, sizeof(value), "0x%016x", start); + setenv(key, value, 1); + snprintf(key, sizeof(key), "hint.md.%d.len", i); + snprintf(value, sizeof(value), "0x%016x", end - start); + setenv(key, value, 1); + } +} |