[dhcp] Add symbolic definitions for DHCP client architecture values

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/arch/i386/include/efi/ipxe/dhcp_arch.h

@@ -33,7 +33,8 @@ FILE_LICENCE ( GPL2_OR_LATER );
 		      'A', 'r', 'c', 'h', ':', '0', '0', '0', '0', '6', ':', \
 		      'U', 'N', 'D', 'I', ':', '0', '0', '3', '0', '1', '0' )
 
-#define DHCP_ARCH_CLIENT_ARCHITECTURE DHCP_WORD ( 6 )
+#define DHCP_ARCH_CLIENT_ARCHITECTURE \
+	DHCP_WORD ( DHCP_CLIENT_ARCHITECTURE_IA32 )
 
 #define DHCP_ARCH_CLIENT_NDI DHCP_OPTION ( 1 /* UNDI */ , 3, 10 /* v3.10 */ )
 

src/arch/i386/include/pcbios/ipxe/dhcp_arch.h

@@ -33,7 +33,8 @@ FILE_LICENCE ( GPL2_OR_LATER );
 		      'A', 'r', 'c', 'h', ':', '0', '0', '0', '0', '0', ':', \
 		      'U', 'N', 'D', 'I', ':', '0', '0', '2', '0', '0', '1' )
 
-#define DHCP_ARCH_CLIENT_ARCHITECTURE DHCP_WORD ( 0 )
+#define DHCP_ARCH_CLIENT_ARCHITECTURE \
+	DHCP_WORD ( DHCP_CLIENT_ARCHITECTURE_X86 )
 
 #define DHCP_ARCH_CLIENT_NDI DHCP_OPTION ( 1 /* UNDI */ , 2, 1 /* v2.1 */ )
 

src/arch/x86_64/include/efi/ipxe/dhcp_arch.h

@@ -30,10 +30,11 @@ FILE_LICENCE ( GPL2_OR_LATER );
 
 #define DHCP_ARCH_VENDOR_CLASS_ID \
 	DHCP_STRING ( 'P', 'X', 'E', 'C', 'l', 'i', 'e', 'n', 't', ':',      \
-		      'A', 'r', 'c', 'h', ':', '0', '0', '0', '0', '7', ':', \
+		      'A', 'r', 'c', 'h', ':', '0', '0', '0', '0', '9', ':', \
 		      'U', 'N', 'D', 'I', ':', '0', '0', '3', '0', '1', '0' )
 
-#define DHCP_ARCH_CLIENT_ARCHITECTURE DHCP_WORD ( 7 )
+#define DHCP_ARCH_CLIENT_ARCHITECTURE \
+	DHCP_WORD ( DHCP_CLIENT_ARCHITECTURE_X86_64 )
 
 #define DHCP_ARCH_CLIENT_NDI DHCP_OPTION ( 1 /* UNDI */ , 3, 10 /* v3.10 */ )
 

src/include/ipxe/dhcp.h

@@ -240,6 +240,39 @@ struct dhcp_client_id {
 /** Client system architecture */
 #define DHCP_CLIENT_ARCHITECTURE 93
 
+/** DHCP client architecture */
+struct dhcp_client_architecture {
+	uint16_t arch;
+} __attribute__ (( packed ));
+
+/** DHCP client architecture values
+ *
+ * These are defined by the PXE specification and redefined by
+ * RFC4578.
+ */
+enum dhcp_client_architecture_values {
+	/** Intel x86 PC */
+	DHCP_CLIENT_ARCHITECTURE_X86 = 0x0000,
+	/** NEC/PC98 */
+	DHCP_CLIENT_ARCHITECTURE_PC98 = 0x0001,
+	/** EFI Itanium */
+	DHCP_CLIENT_ARCHITECTURE_IA64 = 0x0002,
+	/** DEC Alpha */
+	DHCP_CLIENT_ARCHITECTURE_ALPHA = 0x0003,
+	/** Arc x86 */
+	DHCP_CLIENT_ARCHITECTURE_ARCX86 = 0x0004,
+	/** Intel Lean Client */
+	DHCP_CLIENT_ARCHITECTURE_LC = 0x0005,
+	/** EFI IA32 */
+	DHCP_CLIENT_ARCHITECTURE_IA32 = 0x0006,
+	/** EFI BC */
+	DHCP_CLIENT_ARCHITECTURE_EFI = 0x0007,
+	/** EFI Xscale */
+	DHCP_CLIENT_ARCHITECTURE_XSCALE = 0x0008,
+	/** EFI x86-64 */
+	DHCP_CLIENT_ARCHITECTURE_X86_64 = 0x0009,
+};
+
 /** Client network device interface */
 #define DHCP_CLIENT_NDI 94