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target/hppa: Implement the system mask instructions

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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2017-10-09 07:44:30 -07:00
parent 3d68ee7bbe
commit e1b5a5ed6f
3 changed files with 113 additions and 1 deletions
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4
target/hppa/helper.h
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@ -76,3 +76,7 @@ DEF_HELPER_FLAGS_4(fmpyfadd_s, TCG_CALL_NO_RWG, i32, env, i32, i32, i32)
DEF_HELPER_FLAGS_4(fmpynfadd_s, TCG_CALL_NO_RWG, i32, env, i32, i32, i32)
DEF_HELPER_FLAGS_4(fmpyfadd_d, TCG_CALL_NO_RWG, i64, env, i64, i64, i64)
DEF_HELPER_FLAGS_4(fmpynfadd_d, TCG_CALL_NO_RWG, i64, env, i64, i64, i64)
#ifndef CONFIG_USER_ONLY
DEF_HELPER_FLAGS_2(swap_system_mask, TCG_CALL_NO_RWG, tr, env, tr)
#endif

14
target/hppa/op_helper.c
View File

@ -601,3 +601,17 @@ float64 HELPER(fmpynfadd_d)(CPUHPPAState *env, float64 a, float64 b, float64 c)
update_fr0_op(env, GETPC());
return ret;
}
#ifndef CONFIG_USER_ONLY
target_ureg HELPER(swap_system_mask)(CPUHPPAState *env, target_ureg nsm)
{
target_ulong psw = env->psw;
/* ??? On second reading this condition simply seems
to be undefined rather than a diagnosed trap. */
if (nsm & ~psw & PSW_Q) {
dynexcp(env, EXCP_ILL, GETPC());
}
env->psw = (psw & ~PSW_SM) | (nsm & PSW_SM);
return psw & PSW_SM;
}
#endif

96
target/hppa/translate.c
View File

@ -299,6 +299,10 @@ typedef struct DisasContext {
updated the iaq for the next instruction to be executed. */
#define DISAS_IAQ_N_STALE DISAS_TARGET_1
/* Similarly, but we want to return to the main loop immediately
to recognize unmasked interrupts. */
#define DISAS_IAQ_N_STALE_EXIT DISAS_TARGET_2
typedef struct DisasInsn {
uint32_t insn, mask;
DisasJumpType (*trans)(DisasContext *ctx, uint32_t insn,
@ -697,6 +701,14 @@ static DisasJumpType gen_illegal(DisasContext *ctx)
return nullify_end(ctx, gen_excp(ctx, EXCP_ILL));
}
#define CHECK_MOST_PRIVILEGED(EXCP) \
do { \
if (ctx->privilege != 0) { \
nullify_over(ctx); \
return nullify_end(ctx, gen_excp(ctx, EXCP)); \
} \
} while (0)
static bool use_goto_tb(DisasContext *ctx, target_ureg dest)
{
/* Suppress goto_tb in the case of single-steping and IO. */
@ -1982,6 +1994,79 @@ static DisasJumpType trans_ldsid(DisasContext *ctx, uint32_t insn,
return DISAS_NEXT;
}
#ifndef CONFIG_USER_ONLY
/* Note that ssm/rsm instructions number PSW_W and PSW_E differently. */
static target_ureg extract_sm_imm(uint32_t insn)
{
target_ureg val = extract32(insn, 16, 10);
if (val & PSW_SM_E) {
val = (val & ~PSW_SM_E) | PSW_E;
}
if (val & PSW_SM_W) {
val = (val & ~PSW_SM_W) | PSW_W;
}
return val;
}
static DisasJumpType trans_rsm(DisasContext *ctx, uint32_t insn,
const DisasInsn *di)
{
unsigned rt = extract32(insn, 0, 5);
target_ureg sm = extract_sm_imm(insn);
TCGv_reg tmp;
CHECK_MOST_PRIVILEGED(EXCP_PRIV_OPR);
nullify_over(ctx);
tmp = get_temp(ctx);
tcg_gen_ld_reg(tmp, cpu_env, offsetof(CPUHPPAState, psw));
tcg_gen_andi_reg(tmp, tmp, ~sm);
gen_helper_swap_system_mask(tmp, cpu_env, tmp);
save_gpr(ctx, rt, tmp);
/* Exit the TB to recognize new interrupts, e.g. PSW_M. */
return nullify_end(ctx, DISAS_IAQ_N_STALE_EXIT);
}
static DisasJumpType trans_ssm(DisasContext *ctx, uint32_t insn,
const DisasInsn *di)
{
unsigned rt = extract32(insn, 0, 5);
target_ureg sm = extract_sm_imm(insn);
TCGv_reg tmp;
CHECK_MOST_PRIVILEGED(EXCP_PRIV_OPR);
nullify_over(ctx);
tmp = get_temp(ctx);
tcg_gen_ld_reg(tmp, cpu_env, offsetof(CPUHPPAState, psw));
tcg_gen_ori_reg(tmp, tmp, sm);
gen_helper_swap_system_mask(tmp, cpu_env, tmp);
save_gpr(ctx, rt, tmp);
/* Exit the TB to recognize new interrupts, e.g. PSW_I. */
return nullify_end(ctx, DISAS_IAQ_N_STALE_EXIT);
}
static DisasJumpType trans_mtsm(DisasContext *ctx, uint32_t insn,
const DisasInsn *di)
{
unsigned rr = extract32(insn, 16, 5);
TCGv_reg tmp, reg;
CHECK_MOST_PRIVILEGED(EXCP_PRIV_OPR);
nullify_over(ctx);
reg = load_gpr(ctx, rr);
tmp = get_temp(ctx);
gen_helper_swap_system_mask(tmp, cpu_env, reg);
/* Exit the TB to recognize new interrupts. */
return nullify_end(ctx, DISAS_IAQ_N_STALE_EXIT);
}
#endif /* !CONFIG_USER_ONLY */
static const DisasInsn table_system[] = {
{ 0x00000000u, 0xfc001fe0u, trans_break },
/* We don't implement space register, so MTSP is a nop. */
@ -1993,6 +2078,11 @@ static const DisasInsn table_system[] = {
{ 0x000008a0u, 0xfc1fffe0u, trans_mfctl },
{ 0x00000400u, 0xffffffffu, trans_sync },
{ 0x000010a0u, 0xfc1f3fe0u, trans_ldsid },
#ifndef CONFIG_USER_ONLY
{ 0x00000e60u, 0xfc00ffe0u, trans_rsm },
{ 0x00000d60u, 0xfc00ffe0u, trans_ssm },
{ 0x00001860u, 0xffe0ffffu, trans_mtsm },
#endif
};
static DisasJumpType trans_base_idx_mod(DisasContext *ctx, uint32_t insn,
@ -4111,12 +4201,14 @@ static void hppa_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs)
static void hppa_tr_tb_stop(DisasContextBase *dcbase, CPUState *cs)
{
DisasContext *ctx = container_of(dcbase, DisasContext, base);
DisasJumpType is_jmp = ctx->base.is_jmp;
switch (ctx->base.is_jmp) {
switch (is_jmp) {
case DISAS_NORETURN:
break;
case DISAS_TOO_MANY:
case DISAS_IAQ_N_STALE:
case DISAS_IAQ_N_STALE_EXIT:
copy_iaoq_entry(cpu_iaoq_f, ctx->iaoq_f, cpu_iaoq_f);
copy_iaoq_entry(cpu_iaoq_b, ctx->iaoq_b, cpu_iaoq_b);
nullify_save(ctx);
@ -4124,6 +4216,8 @@ static void hppa_tr_tb_stop(DisasContextBase *dcbase, CPUState *cs)
case DISAS_IAQ_N_UPDATED:
if (ctx->base.singlestep_enabled) {
gen_excp_1(EXCP_DEBUG);
} else if (is_jmp == DISAS_IAQ_N_STALE_EXIT) {
tcg_gen_exit_tb(0);
} else {
tcg_gen_lookup_and_goto_ptr();
}