[PATCH v3 15/19] efi: LoongArch: Define LoongArch bits everywhere

From: Jiaxun Yang <[email protected]>

Add PE machine type, removable boot image name, vendor class identifier,
client architecture identifier, relative ELF relocation, and undefined
instruction for LoongArch. They are all coming from UEFI specification,
PE-COFF specification, or IANA websites.

Signed-off-by: Jiaxun Yang <[email protected]>
Signed-off-by: Yao Zi <[email protected]>
---

Changed from v2
- Describe what has been added in commit message
- Drop extra paretheses in elif condition in config_distro_bootcmd.h
- Define IMAGE_REL_BASED_LOONGARCH32_MARK_LA as well in include/pe.h

Changed from v1
- Reword commit message, replacing "PE spec" with "PE-COFF specification"
- Replace obsolete __loongarch64 macro with __loongarch__ and
  __loongarch_grlen
- Use a true undefined instruction in efi_selftest_miniapp_exception.c
- Define HOST_BOOTEFI_NAME and HOST_PXE_ARCH
- Introduce definition for IMAGE_REL_BASEd_LOONGARCH64_MARK_LA

 include/asm-generic/pe.h                          | 2 ++
 include/config_distro_bootcmd.h                   | 5 +++++
 include/pe.h                                      | 2 ++
 lib/efi_loader/efi_helper.c                       | 4 ++++
 lib/efi_loader/efi_image_loader.c                 | 7 +++++++
 lib/efi_loader/efi_runtime.c                      | 4 ++++
 lib/efi_selftest/efi_selftest_miniapp_exception.c | 3 +++
 7 files changed, 27 insertions(+)

diff --git a/include/asm-generic/pe.h b/include/asm-generic/pe.h
index cd5b6ad62bf0..fb93f2621715 100644
--- a/include/asm-generic/pe.h
+++ b/include/asm-generic/pe.h
@@ -38,6 +38,8 @@
 #define IMAGE_FILE_MACHINE_ARM64		0xaa64
 #define IMAGE_FILE_MACHINE_RISCV32		0x5032
 #define IMAGE_FILE_MACHINE_RISCV64		0x5064
+#define IMAGE_FILE_MACHINE_LOONGARCH32	0x6232
+#define IMAGE_FILE_MACHINE_LOONGARCH64	0x6264
 
 /* Header magic constants */
 #define IMAGE_NT_OPTIONAL_HDR32_MAGIC		0x010b
diff --git a/include/config_distro_bootcmd.h b/include/config_distro_bootcmd.h
index 8d6f80a0ce5c..0eb6bd742b9f 100644
--- a/include/config_distro_bootcmd.h
+++ b/include/config_distro_bootcmd.h
@@ -118,6 +118,8 @@
 #define BOOTEFI_NAME "bootriscv32.efi"
 #elif defined(CONFIG_ARCH_RV64I)
 #define BOOTEFI_NAME "bootriscv64.efi"
+#elif defined(CONFIG_ARCH_LA64)
+#define BOOTEFI_NAME "bootloongarch64.efi"
 #endif
 #endif
 
@@ -371,6 +373,9 @@
 #elif defined(CONFIG_ARCH_RV64I) || ((defined(__riscv) && __riscv_xlen == 64))
 #define BOOTENV_EFI_PXE_ARCH "0x1b"
 #define BOOTENV_EFI_PXE_VCI "PXEClient:Arch:00027:UNDI:003000"
+#elif defined(CONFIG_ARCH_LA64) || (defined(__loongarch__) && __loongarch_grlen == 64)
+#define BOOTENV_EFI_PXE_ARCH "0x27"
+#define BOOTENV_EFI_PXE_VCI "PXEClient:Arch:00039:UNDI:003000"
 #elif defined(CONFIG_SANDBOX)
 # error "sandbox EFI support is only supported on ARM and x86"
 #else
diff --git a/include/pe.h b/include/pe.h
index 086f2b860e99..eac9eb25ce47 100644
--- a/include/pe.h
+++ b/include/pe.h
@@ -194,6 +194,8 @@ typedef struct _IMAGE_RELOCATION
 #define IMAGE_REL_BASED_THUMB_MOV32             7 /* yes, 7 too */
 #define IMAGE_REL_BASED_RISCV_LOW12I		7 /* yes, 7 too */
 #define IMAGE_REL_BASED_RISCV_LOW12S		8
+#define IMAGE_REL_BASED_LOONGARCH32_MARK_LA	8 /* yes, 8 too */
+#define IMAGE_REL_BASED_LOONGARCH64_MARK_LA	8 /* yes, 8 too */
 #define IMAGE_REL_BASED_MIPS_JMPADDR16          9
 #define IMAGE_REL_BASED_IA64_IMM64              9 /* yes, 9 too */
 #define IMAGE_REL_BASED_DIR64                   10
diff --git a/lib/efi_loader/efi_helper.c b/lib/efi_loader/efi_helper.c
index 44b806aadc4f..bc48e265b901 100644
--- a/lib/efi_loader/efi_helper.c
+++ b/lib/efi_loader/efi_helper.c
@@ -62,6 +62,8 @@
 #define BOOTEFI_NAME "BOOTRISCV32.EFI"
 #elif defined(CONFIG_ARCH_RV64I)
 #define BOOTEFI_NAME "BOOTRISCV64.EFI"
+#elif defined(CONFIG_ARCH_LA64)
+#define BOOTEFI_NAME "BOOTLOONGARCH64.EFI"
 #else
 #error Unsupported UEFI architecture
 #endif
@@ -94,6 +96,8 @@ int efi_get_pxe_arch(void)
 		return 0x19;
 	else if (IS_ENABLED(CONFIG_ARCH_RV64I))
 		return 0x1b;
+	else if (IS_ENABLED(CONFIG_ARCH_LA64))
+		return 0x27;
 
 	return -EINVAL;
 }
diff --git a/lib/efi_loader/efi_image_loader.c b/lib/efi_loader/efi_image_loader.c
index f9a2d2df405d..bed5f1817266 100644
--- a/lib/efi_loader/efi_image_loader.c
+++ b/lib/efi_loader/efi_image_loader.c
@@ -51,6 +51,13 @@ static int machines[] = {
 #if defined(__riscv) && (__riscv_xlen == 64)
 	IMAGE_FILE_MACHINE_RISCV64,
 #endif
+
+#if defined(__loongarch__) && __loongarch_grlen == 64
+	IMAGE_FILE_MACHINE_LOONGARCH64,
+#endif
+#if defined(__loongarch__) && __loongarch_grlen == 32
+	IMAGE_FILE_MACHINE_LOONGARCH32,
+#endif
 	0 };
 
 /**
diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c
index 73d4097464c0..de50d72d634a 100644
--- a/lib/efi_loader/efi_runtime.c
+++ b/lib/efi_loader/efi_runtime.c
@@ -78,6 +78,10 @@ struct dyn_sym {
 #else
 #error unknown riscv target
 #endif
+#elif defined(__loongarch__)
+#define R_RELATIVE	R_LARCH_RELATIVE
+#define R_MASK		0xffffffffULL
+#define IS_RELA		1
 #else
 #error Need to add relocation awareness
 #endif
diff --git a/lib/efi_selftest/efi_selftest_miniapp_exception.c b/lib/efi_selftest/efi_selftest_miniapp_exception.c
index f668cdac4ab2..648206c17098 100644
--- a/lib/efi_selftest/efi_selftest_miniapp_exception.c
+++ b/lib/efi_selftest/efi_selftest_miniapp_exception.c
@@ -35,6 +35,9 @@ efi_status_t EFIAPI efi_main(efi_handle_t handle,
 	asm volatile (".word 0xffffffff\n");
 #elif defined(CONFIG_X86)
 	asm volatile (".word 0xffff\n");
+#elif defined(CONFIG_LOONGARCH)
+	/* ud 31 */
+	asm volatile (".word 0x386007ff\n");
 #elif defined(CONFIG_SANDBOX)
 #if (HOST_ARCH == HOST_ARCH_ARM || HOST_ARCH == HOST_ARCH_AARCH64)
 	asm volatile (".word 0xe7f7defb\n");
-- 
2.55.0