The spr TBU40 is used to set the upper 40 bits of the timebase
register, present on POWER5+ and later processors.
This register can only be written by the hypervisor, and cannot be read.
Signed-off-by: Suraj Jitindar Singh <sjitindarsi...@gmail.com>
---
hw/ppc/ppc.c | 13 +++++++++++++
target/ppc/cpu.h | 1 +
target/ppc/helper.h | 1 +
target/ppc/timebase_helper.c | 5 +++++
target/ppc/translate_init.inc.c | 19 +++++++++++++++++++
5 files changed, 39 insertions(+)
diff --git a/hw/ppc/ppc.c b/hw/ppc/ppc.c
index b567156f97..b618c6f615 100644
--- a/hw/ppc/ppc.c
+++ b/hw/ppc/ppc.c
@@ -710,6 +710,19 @@ void cpu_ppc_store_vtb(CPUPPCState *env, uint64_t value)
&tb_env->vtb_offset, value);
}
+void cpu_ppc_store_tbu40(CPUPPCState *env, uint64_t value)
+{
+ ppc_tb_t *tb_env = env->tb_env;
+ uint64_t tb;
+
+ tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
+ tb_env->tb_offset);
+ tb &= 0xFFFFFFUL;
+ tb |= (value & ~0xFFFFFFUL);
+ cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
+ &tb_env->tb_offset, tb);
+}
+
static void cpu_ppc_tb_stop (CPUPPCState *env)
{
ppc_tb_t *tb_env = env->tb_env;
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index 8d66265e5a..e324064111 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -1334,6 +1334,7 @@ target_ulong cpu_ppc_load_decr (CPUPPCState *env);
void cpu_ppc_store_decr (CPUPPCState *env, target_ulong value);
target_ulong cpu_ppc_load_hdecr (CPUPPCState *env);
void cpu_ppc_store_hdecr (CPUPPCState *env, target_ulong value);
+void cpu_ppc_store_tbu40(CPUPPCState *env, uint64_t value);
uint64_t cpu_ppc_load_purr (CPUPPCState *env);
void cpu_ppc_store_purr(CPUPPCState *env, uint64_t value);
uint32_t cpu_ppc601_load_rtcl (CPUPPCState *env);
diff --git a/target/ppc/helper.h b/target/ppc/helper.h
index 336e7802fb..6aee195528 100644
--- a/target/ppc/helper.h
+++ b/target/ppc/helper.h
@@ -703,6 +703,7 @@ DEF_HELPER_FLAGS_2(store_decr, TCG_CALL_NO_RWG, void, env,
tl)
DEF_HELPER_FLAGS_1(load_hdecr, TCG_CALL_NO_RWG, tl, env)
DEF_HELPER_FLAGS_2(store_hdecr, TCG_CALL_NO_RWG, void, env, tl)
DEF_HELPER_FLAGS_2(store_vtb, TCG_CALL_NO_RWG, void, env, tl)
+DEF_HELPER_FLAGS_2(store_tbu40, TCG_CALL_NO_RWG, void, env, tl)
DEF_HELPER_2(store_hid0_601, void, env, tl)
DEF_HELPER_3(store_403_pbr, void, env, i32, tl)
DEF_HELPER_FLAGS_1(load_40x_pit, TCG_CALL_NO_RWG, tl, env)
diff --git a/target/ppc/timebase_helper.c b/target/ppc/timebase_helper.c
index 2395295b77..703bd9ed18 100644
--- a/target/ppc/timebase_helper.c
+++ b/target/ppc/timebase_helper.c
@@ -128,6 +128,11 @@ void helper_store_vtb(CPUPPCState *env, target_ulong val)
cpu_ppc_store_vtb(env, val);
}
+void helper_store_tbu40(CPUPPCState *env, target_ulong val)
+{
+ cpu_ppc_store_tbu40(env, val);
+}
+
target_ulong helper_load_40x_pit(CPUPPCState *env)
{
return load_40x_pit(env);
diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.inc.c
index a0cae58e19..8e287066e5 100644
--- a/target/ppc/translate_init.inc.c
+++ b/target/ppc/translate_init.inc.c
@@ -325,6 +325,11 @@ static void spr_write_vtb(DisasContext *ctx, int sprn, int
gprn)
gen_helper_store_vtb(cpu_env, cpu_gpr[gprn]);
}
+static void spr_write_tbu40(DisasContext *ctx, int sprn, int gprn)
+{
+ gen_helper_store_tbu40(cpu_env, cpu_gpr[gprn]);
+}
+
#endif
#endif
@@ -7812,6 +7817,16 @@ static void gen_spr_power5p_ear(CPUPPCState *env)
0x00000000);
}
+static void gen_spr_power5p_tb(CPUPPCState *env)
+{
+ /* TBU40 (High 40 bits of the Timebase register */
+ spr_register_hv(env, SPR_TBU40, "TBU40",
+ SPR_NOACCESS, SPR_NOACCESS,
+ SPR_NOACCESS, SPR_NOACCESS,
+ SPR_NOACCESS, &spr_write_tbu40,
+ 0x00000000);
+}
+
#if !defined(CONFIG_USER_ONLY)
static void spr_write_hmer(DisasContext *ctx, int sprn, int gprn)
{
@@ -8352,6 +8367,7 @@ static void init_proc_power5plus(CPUPPCState *env)
gen_spr_power5p_common(env);
gen_spr_power5p_lpar(env);
gen_spr_power5p_ear(env);
+ gen_spr_power5p_tb(env);
/* env variables */
env->dcache_line_size = 128;
@@ -8464,6 +8480,7 @@ static void init_proc_POWER7(CPUPPCState *env)
gen_spr_power5p_common(env);
gen_spr_power5p_lpar(env);
gen_spr_power5p_ear(env);
+ gen_spr_power5p_tb(env);
gen_spr_power6_common(env);
gen_spr_power6_dbg(env);
gen_spr_power7_book4(env);
@@ -8605,6 +8622,7 @@ static void init_proc_POWER8(CPUPPCState *env)
gen_spr_power5p_common(env);
gen_spr_power5p_lpar(env);
gen_spr_power5p_ear(env);
+ gen_spr_power5p_tb(env);
gen_spr_power6_common(env);
gen_spr_power6_dbg(env);
gen_spr_power8_tce_address_control(env);
@@ -8793,6 +8811,7 @@ static void init_proc_POWER9(CPUPPCState *env)
gen_spr_power5p_common(env);
gen_spr_power5p_lpar(env);
gen_spr_power5p_ear(env);
+ gen_spr_power5p_tb(env);
gen_spr_power6_common(env);
gen_spr_power6_dbg(env);
gen_spr_power8_tce_address_control(env);
--
2.13.6
