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Fri, 17 Jul 2026 08:46:09 +0000 From: Jamin Lin To: =?Windows-1252?Q?C=E9dric_Le_Goater?= , Peter Maydell , Steven Lee , Troy Lee , Kane Chen , Andrew Jeffery , Joel Stanley , Alistair Francis , Fabiano Rosas , Laurent Vivier , Paolo Bonzini , "open list:ASPEED BMCs" , "open list:All patches CC here" CC: Jamin Lin , Troy Lee , =?Windows-1252?Q?Philippe_Mathieu-Daud=E9?= , =?Windows-1252?Q?C=E9dric_Le_Goater?= Subject: [PATCH v4 7/9] hw/arm/ast27x0: Share FMC controller with SSP and TSP Thread-Topic: [PATCH v4 7/9] hw/arm/ast27x0: Share FMC controller with SSP and TSP Thread-Index: AQHdFci2KA6mWk3eukCzHQZV5WFyvQ== Date: Fri, 17 Jul 2026 08:46:09 +0000 Message-ID: <20260717084559.3477061-8-jamin_lin@aspeedtech.com> References: <20260717084559.3477061-1-jamin_lin@aspeedtech.com> In-Reply-To: <20260717084559.3477061-1-jamin_lin@aspeedtech.com> Accept-Language: zh-TW, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=aspeedtech.com; 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envelope-from=jamin_lin@aspeedtech.com; helo=TYPPR03CU001.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org AST2700 provides a single FMC controller shared by the main CA35 processor= =0A= (PSP) and the SSP/TSP coprocessors.=0A= =0A= >From the PSP perspective, the FMC controller is memory-mapped at=0A= 0x14000000=960x140000FF. The SSP and TSP access the same controller through= =0A= a different address window at 0x74000000=960x740000FF.=0A= =0A= This change allows the SSP and TSP SoC models to reference the existing=0A= PSP FMC instance instead of creating independent controllers. An MMIO=0A= alias is added in the SSP and TSP address spaces to map their FMC access=0A= window to the shared FMC device.=0A= =0A= This ensures consistent FMC state across PSP, SSP, and TSP and matches=0A= the AST2700 hardware design.=0A= =0A= Signed-off-by: Jamin Lin =0A= Reviewed-by: Philippe Mathieu-Daud=E9 =0A= Reviewed-by: C=E9dric Le Goater =0A= Tested-by: Philippe Mathieu-Daud=E9 =0A= ---=0A= include/hw/arm/aspeed_coprocessor.h | 7 +++++++=0A= hw/arm/aspeed_ast27x0-fc.c | 4 ++++=0A= hw/arm/aspeed_ast27x0-ssp.c | 16 ++++++++++++++++=0A= hw/arm/aspeed_ast27x0-tsp.c | 16 ++++++++++++++++=0A= 4 files changed, 43 insertions(+)=0A= =0A= diff --git a/include/hw/arm/aspeed_coprocessor.h b/include/hw/arm/aspeed_co= processor.h=0A= index b77ea06e7f..acb8b06457 100644=0A= --- a/include/hw/arm/aspeed_coprocessor.h=0A= +++ b/include/hw/arm/aspeed_coprocessor.h=0A= @@ -49,10 +49,17 @@ struct Aspeed27x0CoprocessorState {=0A= =0A= ARMv7MState armv7m;=0A= =0A= + /*=0A= + * SCU, SCUIO and FMC are not owned by this coprocessor: they are=0A= + * shared with the main PSP SoC, and only aliased into this=0A= + * coprocessor's own address space here.=0A= + */=0A= MemoryRegion scu_alias;=0A= MemoryRegion scuio_alias;=0A= + MemoryRegion fmc_alias;=0A= Aspeed2700SCUState *scu;=0A= AspeedSCUState *scuio;=0A= + AspeedSMCState *fmc;=0A= };=0A= =0A= #define TYPE_ASPEED27X0SSP_COPROCESSOR "aspeed27x0ssp-coprocessor"=0A= diff --git a/hw/arm/aspeed_ast27x0-fc.c b/hw/arm/aspeed_ast27x0-fc.c=0A= index d14a42ebca..058cea42ed 100644=0A= --- a/hw/arm/aspeed_ast27x0-fc.c=0A= +++ b/hw/arm/aspeed_ast27x0-fc.c=0A= @@ -159,6 +159,8 @@ static bool ast2700fc_ssp_init(Ast2700FCState *s, Aspee= dSoCState *psp,=0A= OBJECT(&s->ca35.scu), &error_abort);=0A= object_property_set_link(OBJECT(&s->ssp), "scuio",=0A= OBJECT(&psp->scuio), &error_abort);=0A= + object_property_set_link(OBJECT(&s->ssp), "fmc",=0A= + OBJECT(&psp->fmc), &error_abort);=0A= if (!qdev_realize(DEVICE(&s->ssp), NULL, errp)) {=0A= return false;=0A= }=0A= @@ -191,6 +193,8 @@ static bool ast2700fc_tsp_init(Ast2700FCState *s, Aspee= dSoCState *psp,=0A= OBJECT(&s->ca35.scu), &error_abort);=0A= object_property_set_link(OBJECT(&s->tsp), "scuio",=0A= OBJECT(&psp->scuio), &error_abort);=0A= + object_property_set_link(OBJECT(&s->tsp), "fmc",=0A= + OBJECT(&psp->fmc), &error_abort);=0A= if (!qdev_realize(DEVICE(&s->tsp), NULL, errp)) {=0A= return false;=0A= }=0A= diff --git a/hw/arm/aspeed_ast27x0-ssp.c b/hw/arm/aspeed_ast27x0-ssp.c=0A= index fa492f1797..e03653086c 100644=0A= --- a/hw/arm/aspeed_ast27x0-ssp.c=0A= +++ b/hw/arm/aspeed_ast27x0-ssp.c=0A= @@ -27,6 +27,7 @@ static const hwaddr aspeed_soc_ast27x0ssp_memmap[] =3D {= =0A= [ASPEED_DEV_TIMER1] =3D 0x72C10000,=0A= [ASPEED_DEV_UART4] =3D 0x72C1A000,=0A= [ASPEED_DEV_IPC0] =3D 0x72C1C000,=0A= + [ASPEED_DEV_FMC] =3D 0x74000000,=0A= [ASPEED_DEV_PRIC1] =3D 0x74100000,=0A= [ASPEED_DEV_SCUIO] =3D 0x74C02000,=0A= [ASPEED_DEV_OTP] =3D 0x74C07000,=0A= @@ -177,6 +178,12 @@ static void aspeed_soc_ast27x0ssp_realize(DeviceState = *dev_soc, Error **errp)=0A= return;=0A= }=0A= =0A= + if (!a->fmc) {=0A= + error_setg(errp, TYPE_ASPEED27X0SSP_COPROCESSOR=0A= + ": 'fmc' link is not set");=0A= + return;=0A= + }=0A= +=0A= /* AST27X0 SSP Core */=0A= armv7m =3D DEVICE(&a->armv7m);=0A= qdev_prop_set_uint32(armv7m, "num-irq", 256);=0A= @@ -269,6 +276,13 @@ static void aspeed_soc_ast27x0ssp_realize(DeviceState = *dev_soc, Error **errp)=0A= sysbus_connect_irq(SYS_BUS_DEVICE(s->uart), 0,=0A= aspeed_soc_ast27x0ssp_get_irq(s, s->uart_dev));=0A= =0A= + /* FMC */=0A= + memory_region_init_alias(&a->fmc_alias, OBJECT(a), "fmc.alias",=0A= + &a->fmc->mmio, 0,=0A= + memory_region_size(&a->fmc->mmio));=0A= + memory_region_add_subregion(s->memory, sc->memmap[ASPEED_DEV_FMC],=0A= + &a->fmc_alias);=0A= +=0A= aspeed_mmio_map_unimplemented(s->memory, SYS_BUS_DEVICE(&s->timerctrl)= ,=0A= "aspeed.timerctrl",=0A= sc->memmap[ASPEED_DEV_TIMER1], 0x200);= =0A= @@ -294,6 +308,8 @@ static const Property aspeed_27x0_coprocessor_propertie= s[] =3D {=0A= TYPE_ASPEED_2700_SCU, Aspeed2700SCUState *),=0A= DEFINE_PROP_LINK("scuio", Aspeed27x0CoprocessorState, scuio,=0A= TYPE_ASPEED_SCU, AspeedSCUState *),=0A= + DEFINE_PROP_LINK("fmc", Aspeed27x0CoprocessorState, fmc, TYPE_ASPEED_S= MC,=0A= + AspeedSMCState *),=0A= };=0A= =0A= static void aspeed_soc_ast27x0ssp_class_init(ObjectClass *klass,=0A= diff --git a/hw/arm/aspeed_ast27x0-tsp.c b/hw/arm/aspeed_ast27x0-tsp.c=0A= index 3a98bd232c..39ba062a20 100644=0A= --- a/hw/arm/aspeed_ast27x0-tsp.c=0A= +++ b/hw/arm/aspeed_ast27x0-tsp.c=0A= @@ -27,6 +27,7 @@ static const hwaddr aspeed_soc_ast27x0tsp_memmap[] =3D {= =0A= [ASPEED_DEV_TIMER1] =3D 0x72C10000,=0A= [ASPEED_DEV_UART4] =3D 0x72C1A000,=0A= [ASPEED_DEV_IPC0] =3D 0x72C1C000,=0A= + [ASPEED_DEV_FMC] =3D 0x74000000,=0A= [ASPEED_DEV_PRIC1] =3D 0x74100000,=0A= [ASPEED_DEV_SCUIO] =3D 0x74C02000,=0A= [ASPEED_DEV_OTP] =3D 0x74C07000,=0A= @@ -177,6 +178,12 @@ static void aspeed_soc_ast27x0tsp_realize(DeviceState = *dev_soc, Error **errp)=0A= return;=0A= }=0A= =0A= + if (!a->fmc) {=0A= + error_setg(errp, TYPE_ASPEED27X0TSP_COPROCESSOR=0A= + ": 'fmc' link is not set");=0A= + return;=0A= + }=0A= +=0A= /* AST27X0 TSP Core */=0A= armv7m =3D DEVICE(&a->armv7m);=0A= qdev_prop_set_uint32(armv7m, "num-irq", 256);=0A= @@ -269,6 +276,13 @@ static void aspeed_soc_ast27x0tsp_realize(DeviceState = *dev_soc, Error **errp)=0A= sysbus_connect_irq(SYS_BUS_DEVICE(s->uart), 0,=0A= aspeed_soc_ast27x0tsp_get_irq(s, s->uart_dev));=0A= =0A= + /* FMC */=0A= + memory_region_init_alias(&a->fmc_alias, OBJECT(a), "fmc.alias",=0A= + &a->fmc->mmio, 0,=0A= + memory_region_size(&a->fmc->mmio));=0A= + memory_region_add_subregion(s->memory, sc->memmap[ASPEED_DEV_FMC],=0A= + &a->fmc_alias);=0A= +=0A= aspeed_mmio_map_unimplemented(s->memory, SYS_BUS_DEVICE(&s->timerctrl)= ,=0A= "aspeed.timerctrl",=0A= sc->memmap[ASPEED_DEV_TIMER1], 0x200);= =0A= @@ -294,6 +308,8 @@ static const Property aspeed_27x0_coprocessor_propertie= s[] =3D {=0A= TYPE_ASPEED_2700_SCU, Aspeed2700SCUState *),=0A= DEFINE_PROP_LINK("scuio", Aspeed27x0CoprocessorState, scuio,=0A= TYPE_ASPEED_SCU, AspeedSCUState *),=0A= + DEFINE_PROP_LINK("fmc", Aspeed27x0CoprocessorState, fmc, TYPE_ASPEED_S= MC,=0A= + AspeedSMCState *),=0A= };=0A= =0A= static void aspeed_soc_ast27x0tsp_class_init(ObjectClass *klass,=0A= -- =0A= 2.43.0=0A=