add basic raidframe support to efiboot.

if raid disklabel or gpt is found, add this partition with
the offset/size adjusted by RF_PROTECTED_SECTORS.  note

don't le32toh() the disklabel.  if it was wrong-endian, then
getdisklabel() will have swapped it.


Index: efiblock.c
===================================================================
RCS file: /cvsroot/src/sys/stand/efiboot/efiblock.c,v
retrieving revision 1.10
diff -p -u -r1.10 efiblock.c
--- efiblock.c	28 Nov 2020 15:24:05 -0000	1.10
+++ efiblock.c	26 May 2021 04:11:15 -0000
@@ -38,6 +38,13 @@
 #include "efiboot.h"
 #include "efiblock.h"
 
+/*
+ * The raidframe support is basic.  Ideally, it should be expanded to
+ * consider raid volumes a first-class citizen like the x86 efiboot does,
+ * but for now, we simply assume each RAID is potentially bootable.
+ */
+#define	RF_PROTECTED_SECTORS	64	/* XXX refer to <.../rf_optnames.h> */
+
 static EFI_HANDLE *efi_block;
 static UINTN efi_nblock;
 static struct efi_block_part *efi_block_booted = NULL;
@@ -217,6 +224,10 @@ efi_block_find_partitions_disklabel(stru
 		case FS_MSDOS:
 		case FS_BSDLFS:
 			break;
+		case FS_RAID:
+			p->p_size -= RF_PROTECTED_SECTORS;
+			p->p_offset += RF_PROTECTED_SECTORS;
+			break;
 		default:
 			continue;
 		}
@@ -225,7 +236,7 @@ efi_block_find_partitions_disklabel(stru
 		bpart->index = n;
 		bpart->bdev = bdev;
 		bpart->type = EFI_BLOCK_PART_DISKLABEL;
-		bpart->disklabel.secsize = le32toh(d.d_secsize);
+		bpart->disklabel.secsize = d.d_secsize;
 		bpart->disklabel.part = *p;
 		efi_block_generate_hash_mbr(bpart, mbr);
 		TAILQ_INSERT_TAIL(&bdev->partitions, bpart, entries);
@@ -310,6 +321,10 @@ efi_block_find_partitions_gpt_entry(stru
 	bpart->type = EFI_BLOCK_PART_GPT;
 	bpart->gpt.fstype = fstype;
 	bpart->gpt.ent = *ent;
+	if (fstype == FS_RAID) {
+		bpart->gpt.ent.ent_lba_start += RF_PROTECTED_SECTORS;
+		bpart->gpt.ent.ent_lba_end -= RF_PROTECTED_SECTORS;
+	}
 	memcpy(bpart->hash, ent->ent_guid, sizeof(bpart->hash));
 	TAILQ_INSERT_TAIL(&bdev->partitions, bpart, entries);
 
@@ -436,7 +451,7 @@ efi_block_probe(void)
 					fstype = FS_ISO9660;
 					break;
 				}
-				if (fstype == FS_BSDFFS || fstype == FS_ISO9660) {
+				if (fstype == FS_BSDFFS || fstype == FS_ISO9660 || fstype == FS_RAID) {
 					char devname[9];
 					snprintf(devname, sizeof(devname), "hd%u%c", bdev->index, bpart->index + 'a');
 					set_default_device(devname);
Index: version
===================================================================
RCS file: /cvsroot/src/sys/stand/efiboot/version,v
retrieving revision 1.23
diff -p -u -r1.23 version
--- version	21 May 2021 21:53:15 -0000	1.23
+++ version	26 May 2021 04:11:15 -0000
@@ -27,3 +27,4 @@ is taken as the current.
 2.4:	Add ISO9660 support.
 2.5:	Recognize the EFI system partion as fstype MSDOS.
 2.6:	Disable ACPI support when booting big endian kernels.
+2.7:	Add basic support for booting from RAID1 volumes.