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X-Received-From: 2a00:1450:400c:c09::244 Subject: [Qemu-devel] [PATCH RFC v19 05/13] target-avr: adding AVR interrupt handling X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Richard Henderson , Michael Rolnik , anichang@protonmail.ch Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Signed-off-by: Michael Rolnik Message-Id: <1471522070-77598-6-git-send-email-mrolnik@gmail.com> Signed-off-by: Richard Henderson --- target/avr/helper.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++= ++++ 1 file changed, 55 insertions(+) diff --git a/target/avr/helper.c b/target/avr/helper.c index c1871939b3..61255fdff3 100644 --- a/target/avr/helper.c +++ b/target/avr/helper.c @@ -32,11 +32,66 @@ bool avr_cpu_exec_interrupt(CPUState *cs, int interrupt_request) { bool ret =3D false; + CPUClass *cc =3D CPU_GET_CLASS(cs); + AVRCPU *cpu =3D AVR_CPU(cs); + CPUAVRState *env =3D &cpu->env; + + if (interrupt_request & CPU_INTERRUPT_RESET) { + if (cpu_interrupts_enabled(env)) { + cs->exception_index =3D EXCP_RESET; + cc->do_interrupt(cs); + + cs->interrupt_request &=3D ~CPU_INTERRUPT_RESET; + + ret =3D true; + } + } + if (interrupt_request & CPU_INTERRUPT_HARD) { + if (cpu_interrupts_enabled(env) && env->intsrc !=3D 0) { + int index =3D ctz32(env->intsrc); + cs->exception_index =3D EXCP_INT(index); + cc->do_interrupt(cs); + + env->intsrc &=3D env->intsrc - 1; /* clear the interrupt */ + cs->interrupt_request &=3D ~CPU_INTERRUPT_HARD; + + ret =3D true; + } + } return ret; } =20 void avr_cpu_do_interrupt(CPUState *cs) { + AVRCPU *cpu =3D AVR_CPU(cs); + CPUAVRState *env =3D &cpu->env; + + uint32_t ret =3D env->pc_w; + int vector =3D 0; + int size =3D avr_feature(env, AVR_FEATURE_JMP_CALL) ? 2 : 1; + int base =3D 0; /* TODO: where to get it */ + + if (cs->exception_index =3D=3D EXCP_RESET) { + vector =3D 0; + } else if (env->intsrc !=3D 0) { + vector =3D ctz32(env->intsrc) + 1; + } + + if (avr_feature(env, AVR_FEATURE_3_BYTE_PC)) { + cpu_stb_data(env, env->sp--, (ret & 0x0000ff)); + cpu_stb_data(env, env->sp--, (ret & 0x00ff00) >> 8); + cpu_stb_data(env, env->sp--, (ret & 0xff0000) >> 16); + } else if (avr_feature(env, AVR_FEATURE_2_BYTE_PC)) { + cpu_stb_data(env, env->sp--, (ret & 0x0000ff)); + cpu_stb_data(env, env->sp--, (ret & 0x00ff00) >> 8); + } else { + cpu_stb_data(env, env->sp--, (ret & 0x0000ff)); + } + + env->pc_w =3D base + vector * size; + env->sregI =3D 0; /* clear Global Interrupt Flag */ + + cs->exception_index =3D -1; } =20 int avr_cpu_memory_rw_debug(CPUState *cs, vaddr addr, uint8_t *buf, --=20 2.11.0 (Apple Git-81)