[Qemu-devel] [PATCH 2/8] target-ppc: Add Target Address SPR (TAR) to Power8

[Tom Musta <tommusta@gmail.com>]

This patch adds support for the Target Address Register (TAR) to the Power8
model.

Because supported SPRs are typically identified in an init_proc_*()
function and because the Power8 model is currently just using the
init_proc_POWER7() function, a new init_proc_POWER8() function
is added and plugged into the P8 model.

Signed-off-by: Tom Musta <tommusta@gmail.com>
---
 target-ppc/cpu.h            |    1 +
 target-ppc/translate_init.c |   14 +++++++++++++-
 2 files changed, 14 insertions(+), 1 deletions(-)

diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index b9d6b10..810cf6a 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -1508,6 +1508,7 @@ static inline int cpu_mmu_index (CPUPPCState *env)
 #define SPR_RCPU_L2U_RA2      (0x32A)
 #define SPR_MPC_MD_DBRAM1     (0x32A)
 #define SPR_RCPU_L2U_RA3      (0x32B)
+#define SPR_TAR               (0x32F)
 #define SPR_440_INV0          (0x370)
 #define SPR_440_INV1          (0x371)
 #define SPR_440_INV2          (0x372)
diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index 62bb200..9dd6684 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -7301,6 +7301,18 @@ POWERPC_FAMILY(POWER7P)(ObjectClass *oc, void *data)
     pcc->l1_icache_size = 0x8000;
 }
 
+static void init_proc_POWER8(CPUPPCState *env)
+{
+    /* inherit P7 */
+    init_proc_POWER7(env);
+
+    /* P8 supports the TAR */
+    spr_register(env, SPR_TAR, "TAR",
+                 &spr_read_generic, &spr_write_generic,
+                 &spr_read_generic, &spr_write_generic,
+                 0x00000000);
+}
+
 POWERPC_FAMILY(POWER8)(ObjectClass *oc, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(oc);
@@ -7310,7 +7322,7 @@ POWERPC_FAMILY(POWER8)(ObjectClass *oc, void *data)
     dc->desc = "POWER8";
     pcc->pvr = CPU_POWERPC_POWER8_BASE;
     pcc->pvr_mask = CPU_POWERPC_POWER8_MASK;
-    pcc->init_proc = init_proc_POWER7;
+    pcc->init_proc = init_proc_POWER8;
     pcc->check_pow = check_pow_nocheck;
     pcc->insns_flags = PPC_INSNS_BASE | PPC_STRING | PPC_MFTB |
                        PPC_FLOAT | PPC_FLOAT_FSEL | PPC_FLOAT_FRES |
-- 
1.7.1