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target-xtensa: add basic checks to icache opcodes 

Check privilege level for privileged instructions (IHU, III, IIU and IPFL
are privileged), memory accessibility for instructions that reference memory
(IH* and IPFL) and windowed register validity for all instruction cache
instructions.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2014-02-07 15:57:22 +04:00
parent 7c84259019
commit e848dd4248
3 changed files with 33 additions and 0 deletions
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1
target-xtensa/helper.h
View File

@ -25,6 +25,7 @@ DEF_HELPER_2(advance_ccount, void, env, i32)
DEF_HELPER_1(check_interrupts, void, env)
DEF_HELPER_3(check_atomctl, void, env, i32, i32)
DEF_HELPER_2(itlb_hit_test, void, env, i32)
DEF_HELPER_2(wsr_rasid, void, env, i32)
DEF_HELPER_FLAGS_3(rtlb0, TCG_CALL_NO_RWG_SE, i32, env, i32, i32)
DEF_HELPER_FLAGS_3(rtlb1, TCG_CALL_NO_RWG_SE, i32, env, i32, i32)

5
target-xtensa/op_helper.c
View File

@ -415,6 +415,11 @@ void HELPER(check_interrupts)(CPUXtensaState *env)
check_interrupts(env);
}
void HELPER(itlb_hit_test)(CPUXtensaState *env, uint32_t vaddr)
{
get_page_addr_code(env, vaddr);
}
/*!
* Check vaddr accessibility/cache attributes and raise an exception if
* specified by the ATOMCTL SR.

27
target-xtensa/translate.c
View File

@ -2332,22 +2332,42 @@ static void disas_xtensa_insn(CPUXtensaState *env, DisasContext *dc)
#undef gen_dcache_hit_test4
#undef gen_dcache_hit_test8
#define gen_icache_hit_test(w, shift) do { \
TCGv_i32 addr = tcg_temp_new_i32(); \
gen_window_check1(dc, RRI##w##_S); \
tcg_gen_movi_i32(cpu_pc, dc->pc); \
tcg_gen_addi_i32(addr, cpu_R[RRI##w##_S], \
RRI##w##_IMM##w << shift); \
gen_helper_itlb_hit_test(cpu_env, addr); \
tcg_temp_free(addr); \
} while (0)
#define gen_icache_hit_test4() gen_icache_hit_test(4, 4)
#define gen_icache_hit_test8() gen_icache_hit_test(8, 2)
case 12: /*IPFc*/
HAS_OPTION(XTENSA_OPTION_ICACHE);
gen_window_check1(dc, RRI8_S);
break;
case 13: /*ICEc*/
switch (OP1) {
case 0: /*IPFLl*/
HAS_OPTION(XTENSA_OPTION_ICACHE_INDEX_LOCK);
gen_check_privilege(dc);
gen_icache_hit_test4();
break;
case 2: /*IHUl*/
HAS_OPTION(XTENSA_OPTION_ICACHE_INDEX_LOCK);
gen_check_privilege(dc);
gen_icache_hit_test4();
break;
case 3: /*IIUl*/
HAS_OPTION(XTENSA_OPTION_ICACHE_INDEX_LOCK);
gen_check_privilege(dc);
gen_window_check1(dc, RRI4_S);
break;
default: /*reserved*/
@ -2358,10 +2378,13 @@ static void disas_xtensa_insn(CPUXtensaState *env, DisasContext *dc)
case 14: /*IHIc*/
HAS_OPTION(XTENSA_OPTION_ICACHE);
gen_icache_hit_test8();
break;
case 15: /*IIIc*/
HAS_OPTION(XTENSA_OPTION_ICACHE);
gen_check_privilege(dc);
gen_window_check1(dc, RRI8_S);
break;
default: /*reserved*/
@ -2370,6 +2393,10 @@ static void disas_xtensa_insn(CPUXtensaState *env, DisasContext *dc)
}
break;
#undef gen_icache_hit_test
#undef gen_icache_hit_test4
#undef gen_icache_hit_test8
case 9: /*L16SI*/
gen_load_store(ld16s, 1);
break;