[12/14] target/ppc: Implement LDBAR, TTR SPRs

Commit Message

Nicholas Piggin May 18, 2024, 9:31 a.m. UTC

LDBAR, TTR are a Power-specific SPRs. These simple implementations
are enough for IBM proprietary firmware for now.

Signed-off-by: Nicholas Piggin <[e-mail]>
---
 target/ppc/cpu.h      |  2 ++
 target/ppc/cpu_init.c | 10 ++++++++++
 2 files changed, 12 insertions(+)

Patch

diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index 9a51e54c1c..a014efc23a 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -2098,6 +2098,7 @@  void ppc_compat_add_property(Object *obj, const char *name,
 #define SPR_DEXCR             (0x33C)
 #define SPR_IC                (0x350)
 #define SPR_VTB               (0x351)
+#define SPR_LDBAR             (0x352)
 #define SPR_MMCRC             (0x353)
 #define SPR_PSSCR             (0x357)
 #define SPR_440_INV0          (0x370)
@@ -2144,6 +2145,7 @@  void ppc_compat_add_property(Object *obj, const char *name,
 #define SPR_440_IVLIM         (0x399)
 #define SPR_TSCR              (0x399)
 #define SPR_750_DMAU          (0x39A)
+#define SPR_POWER_TTR         (0x39A)
 #define SPR_750_DMAL          (0x39B)
 #define SPR_440_RSTCFG        (0x39B)
 #define SPR_BOOKE_DCDBTRL     (0x39C)
diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
index dc6b4fc569..4591a68cc5 100644
--- a/target/ppc/cpu_init.c
+++ b/target/ppc/cpu_init.c
@@ -5784,6 +5784,16 @@  static void register_power_common_book4_sprs(CPUPPCState *env)
                  &spr_access_nop, &spr_write_generic,
                  &spr_access_nop, &spr_write_generic,
                  0x00000000);
+    spr_register_hv(env, SPR_LDBAR, "LDBAR",
+                 SPR_NOACCESS, SPR_NOACCESS,
+                 SPR_NOACCESS, SPR_NOACCESS,
+                 &spr_read_generic, &spr_core_lpar_write_generic,
+                 0x00000000);
+    spr_register_hv(env, SPR_POWER_TTR, "TTR",
+                 SPR_NOACCESS, SPR_NOACCESS,
+                 SPR_NOACCESS, SPR_NOACCESS,
+                 &spr_read_generic, &spr_core_write_generic,
+                 0x00000000);
 #endif
 }