[PATCH] firmware-utils: ptgen: add SiFive GPT partition support

[Zoltan HERPAI]

The SiFive RISC-V SoCs use two special partition types in the boot process.
As a first step, the ZSBL (zero-stage bootloader) in the CPU looks for a
partition with a GUID of 5B193300-FC78-40CD-8002-E86C45580B47 to load the
first-stage bootloader - which in OpenWrt's case is an SPL image. The FSBL
(SPL) then looks for a partition with a GUID of
2E54B353-1271-4842-806F-E436D6AF6985 to load the SSBL which is usually an
u-boot.

With ptgen already supporting GPT partition creation, add the required GUID
types and name them accordingly to be invoked with the '-T <GPT partition
type>' parameter.

Signed-off-by: Zoltan HERPAI <wigyori at uid0.hu>
---
 src/ptgen.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/ptgen.c b/src/ptgen.c
index 58066fe..b231c28 100644
--- a/src/ptgen.c
+++ b/src/ptgen.c
@@ -82,6 +82,14 @@ typedef struct {
 	GUID_INIT( 0x0fc63daf, 0x8483, 0x4772, \
 			0x8e, 0x79, 0x3d, 0x69, 0xd8, 0x47, 0x7d, 0xe4)
 
+#define GUID_PARTITION_SIFIVE_SPL \
+	GUID_INIT( 0x5b193300, 0xfc78, 0x40cd, \
+			0x80, 0x02, 0xe8, 0x6c, 0x45, 0x58, 0x0b, 0x47)
+
+#define GUID_PARTITION_SIFIVE_UBOOT \
+	GUID_INIT( 0x2e54b353, 0x1271, 0x4842, \
+			0x80, 0x6f, 0xe4, 0x36, 0xd6, 0xaf, 0x69, 0x85)
+
 #define GPT_HEADER_SIZE         92
 #define GPT_ENTRY_SIZE          128
 #define GPT_ENTRY_MAX           128
@@ -276,6 +284,19 @@ static inline bool parse_gpt_parttype(const char *type, struct partinfo *part)
 			      (1ULL << 56);  /* success=1 */
 		return true;
 	}
+
+	if (!strcmp(type, "sifiveu_spl")) {
+		part->has_guid = true;
+		part->guid = GUID_PARTITION_SIFIVE_SPL;
+		return true;
+	}
+
+	if (!strcmp(type, "sifiveu_uboot")) {
+		part->has_guid = true;
+		part->guid = GUID_PARTITION_SIFIVE_UBOOT;
+		return true;
+	}
+
 	return false;
 }
 
-- 
2.20.1