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ARM CPU suspend/halt (Paul Brook)

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1663 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-11-26 10:46:39 +00:00
parent e8ebb8a8d7
commit 9332f9dafa
4 changed files with 28 additions and 1 deletions
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11
cpu-exec.c
View File

@ -274,6 +274,17 @@ int cpu_exec(CPUState *env1)
return EXCP_HALTED; return EXCP_HALTED;
} }
} }
#elif defined(TARGET_ARM)
if (env1->halted) {
/* An interrupt wakes the CPU even if the I and F CPSR bits are
set. */
if (env1->interrupt_request
& (CPU_INTERRUPT_FIQ | CPU_INTERRUPT_HARD)) {
env1->halted = 0;
} else {
return EXCP_HALTED;
}
}
#endif #endif
cpu_single_env = env1; cpu_single_env = env1;

2
target-arm/cpu.h
View File

@ -90,7 +90,7 @@ typedef struct CPUARMState {
int exception_index; int exception_index;
int interrupt_request; int interrupt_request;
int user_mode_only; int user_mode_only;
uint32_t address; int halted;
/* VFP coprocessor state. */ /* VFP coprocessor state. */
struct { struct {

7
target-arm/op.c
View File

@ -878,6 +878,13 @@ void OPPROTO op_debug(void)
cpu_loop_exit(); cpu_loop_exit();
} }
void OPPROTO op_wfi(void)
{
env->exception_index = EXCP_HLT;
env->halted = 1;
cpu_loop_exit();
}
/* VFP support. We follow the convention used for VFP instrunctions: /* VFP support. We follow the convention used for VFP instrunctions:
Single precition routines have a "s" suffix, double precision a Single precition routines have a "s" suffix, double precision a
"d" suffix. */ "d" suffix. */

9
target-arm/translate.c
View File

@ -496,6 +496,15 @@ static int disas_cp15_insn(DisasContext *s, uint32_t insn)
if (IS_USER(s)) { if (IS_USER(s)) {
return 1; return 1;
} }
if ((insn & 0x0fff0fff) == 0x0e070f90
|| (insn & 0x0fff0fff) == 0x0e070f58) {
/* Wait for interrupt. */
gen_op_movl_T0_im((long)s->pc);
gen_op_movl_reg_TN[0][15]();
gen_op_wfi();
s->is_jmp = DISAS_JUMP;
return 0;
}
rd = (insn >> 12) & 0xf; rd = (insn >> 12) & 0xf;
if (insn & (1 << 20)) { if (insn & (1 << 20)) {
gen_op_movl_T0_cp15(insn); gen_op_movl_T0_cp15(insn);