target/riscv: Introduce mo_endian_env() helper

mo_endian_env() returns the target endianness from CPUArchState.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20251010155045.78220-14-philmd@linaro.org>
[ Changes by AF:
 - Only define mo_endian_env() for softmmu
]
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

diff --git a/target/riscv/op_helper.c b/target/riscv/op_helper.c
index c486f771d35a0650f18167c33f84fb58fd968336..6ccc127c3043150a455ee9181bffc0bc8e9be20d 100644 (file)
--- a/target/riscv/op_helper.c
+++ b/target/riscv/op_helper.c
@@ -28,6 +28,20 @@
 #include "exec/tlb-flags.h"
 #include "trace.h"
 
+#ifndef CONFIG_USER_ONLY
+static inline MemOp mo_endian_env(CPURISCVState *env)
+{
+    /*
+     * A couple of bits in MSTATUS set the endianness:
+     *  - MSTATUS_UBE (User-mode),
+     *  - MSTATUS_SBE (Supervisor-mode),
+     *  - MSTATUS_MBE (Machine-mode)
+     * but we don't implement that yet.
+     */
+    return MO_TE;
+}
+#endif
+
 /* Exceptions processing helpers */
 G_NORETURN void riscv_raise_exception(CPURISCVState *env,
                                       RISCVException exception,
@@ -633,7 +647,7 @@ target_ulong helper_hyp_hlv_hu(CPURISCVState *env, target_ulong addr)
 {
     uintptr_t ra = GETPC();
     int mmu_idx = check_access_hlsv(env, false, ra);
-    MemOpIdx oi = make_memop_idx(MO_TE | MO_UW, mmu_idx);
+    MemOpIdx oi = make_memop_idx(mo_endian_env(env) | MO_UW, mmu_idx);
 
     return cpu_ldw_mmu(env, adjust_addr_virt(env, addr), oi, ra);
 }
@@ -642,7 +656,7 @@ target_ulong helper_hyp_hlv_wu(CPURISCVState *env, target_ulong addr)
 {
     uintptr_t ra = GETPC();
     int mmu_idx = check_access_hlsv(env, false, ra);
-    MemOpIdx oi = make_memop_idx(MO_TE | MO_UL, mmu_idx);
+    MemOpIdx oi = make_memop_idx(mo_endian_env(env) | MO_UL, mmu_idx);
 
     return cpu_ldl_mmu(env, adjust_addr_virt(env, addr), oi, ra);
 }
@@ -651,7 +665,7 @@ target_ulong helper_hyp_hlv_d(CPURISCVState *env, target_ulong addr)
 {
     uintptr_t ra = GETPC();
     int mmu_idx = check_access_hlsv(env, false, ra);
-    MemOpIdx oi = make_memop_idx(MO_TE | MO_UQ, mmu_idx);
+    MemOpIdx oi = make_memop_idx(mo_endian_env(env) | MO_UQ, mmu_idx);
 
     return cpu_ldq_mmu(env, adjust_addr_virt(env, addr), oi, ra);
 }
@@ -669,7 +683,7 @@ void helper_hyp_hsv_h(CPURISCVState *env, target_ulong addr, target_ulong val)
 {
     uintptr_t ra = GETPC();
     int mmu_idx = check_access_hlsv(env, false, ra);
-    MemOpIdx oi = make_memop_idx(MO_TE | MO_UW, mmu_idx);
+    MemOpIdx oi = make_memop_idx(mo_endian_env(env) | MO_UW, mmu_idx);
 
     cpu_stw_mmu(env, adjust_addr_virt(env, addr), val, oi, ra);
 }
@@ -678,7 +692,7 @@ void helper_hyp_hsv_w(CPURISCVState *env, target_ulong addr, target_ulong val)
 {
     uintptr_t ra = GETPC();
     int mmu_idx = check_access_hlsv(env, false, ra);
-    MemOpIdx oi = make_memop_idx(MO_TE | MO_UL, mmu_idx);
+    MemOpIdx oi = make_memop_idx(mo_endian_env(env) | MO_UL, mmu_idx);
 
     cpu_stl_mmu(env, adjust_addr_virt(env, addr), val, oi, ra);
 }
@@ -687,7 +701,7 @@ void helper_hyp_hsv_d(CPURISCVState *env, target_ulong addr, target_ulong val)
 {
     uintptr_t ra = GETPC();
     int mmu_idx = check_access_hlsv(env, false, ra);
-    MemOpIdx oi = make_memop_idx(MO_TE | MO_UQ, mmu_idx);
+    MemOpIdx oi = make_memop_idx(mo_endian_env(env) | MO_UQ, mmu_idx);
 
     cpu_stq_mmu(env, adjust_addr_virt(env, addr), val, oi, ra);
 }
@@ -703,7 +717,7 @@ target_ulong helper_hyp_hlvx_hu(CPURISCVState *env, target_ulong addr)
 {
     uintptr_t ra = GETPC();
     int mmu_idx = check_access_hlsv(env, true, ra);
-    MemOpIdx oi = make_memop_idx(MO_TE | MO_UW, mmu_idx);
+    MemOpIdx oi = make_memop_idx(mo_endian_env(env) | MO_UW, mmu_idx);
 
     return cpu_ldw_code_mmu(env, addr, oi, GETPC());
 }
@@ -712,7 +726,7 @@ target_ulong helper_hyp_hlvx_wu(CPURISCVState *env, target_ulong addr)
 {
     uintptr_t ra = GETPC();
     int mmu_idx = check_access_hlsv(env, true, ra);
-    MemOpIdx oi = make_memop_idx(MO_TE | MO_UL, mmu_idx);
+    MemOpIdx oi = make_memop_idx(mo_endian_env(env) | MO_UL, mmu_idx);
 
     return cpu_ldl_code_mmu(env, addr, oi, ra);
 }