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Add i.MX7 SRC device implementation

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The SRC device is normally used to start the secondary CPU.

When running Linux directly, QEMU is emulating a PSCI interface that UBOOT
is installing at boot time and therefore the fact that the SRC device is
unimplemented is hidden as Qemu respond directly to PSCI requets without
using the SRC device.

But if you try to run a more bare metal application (maybe uboot itself),
then it is not possible to start the secondary CPU as the SRC is an
unimplemented device.

This patch adds the ability to start the secondary CPU through the SRC
device so that you can use this feature in bare metal applications.

Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: ce9a0162defd2acee5dc7f8a674743de0cded569.1692964892.git.jcd@tribudubois.net
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Jean-Christophe Dubois 2023-08-31 09:45:17 +01:00 • committed by Peter Maydell
parent 736988a040
commit 12517bc978
6 changed files with 356 additions and 2 deletions
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8
hw/arm/fsl-imx7.c
View file

@ -82,6 +82,11 @@ static void fsl_imx7_init(Object *obj)
*/
object_initialize_child(obj, "gpcv2", &s->gpcv2, TYPE_IMX_GPCV2);
/*
* SRC
*/
object_initialize_child(obj, "src", &s->src, TYPE_IMX7_SRC);
/*
* ECSPIs
*/
@ -488,7 +493,8 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
/*
* SRC
*/
create_unimplemented_device("src", FSL_IMX7_SRC_ADDR, FSL_IMX7_SRC_SIZE);
sysbus_realize(SYS_BUS_DEVICE(&s->src), &error_abort);
sysbus_mmio_map(SYS_BUS_DEVICE(&s->src), 0, FSL_IMX7_SRC_ADDR);
/*
* Watchdogs