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From: Bernhard Beschow <shentey@gmail.com>
To: qemu-devel@nongnu.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Jean-Christophe Dubois <jcd@tribudubois.net>, qemu-arm@nongnu.org,
Peter Maydell <peter.maydell@linaro.org>,
=?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>,
Laurent Vivier <lvivier@redhat.com>,
Andrey Smirnov <andrew.smirnov@gmail.com>,
Bernhard Beschow <shentey@gmail.com>, Fabiano Rosas <farosas@suse.de>,
Alistair Francis <alistair@alistair23.me>,
"Edgar E. Iglesias" <edgar.iglesias@gmail.com>,
=?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@linaro.org>
Subject: [PATCH v2 16/18] hw/arm/fsl-imx8mp: Add boot ROM
Date: Sun, 23 Feb 2025 12:47:06 +0100
Message-ID: <20250223114708.1780-17-shentey@gmail.com>
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On a real device, the boot ROM contains the very first instructions the CPU
executes. Also, U-Boot calls into the ROM to determine the boot device. Whi=
le
we're not actually implementing this here, let's create the infrastructure =
and
add a dummy ROM with all zeros. This allows for implementing a ROM later wi=
thout
touching the source code and even allows for users to provide their own ROM=
s.
The imx8mp-boot.rom was created with
`dd if=3D/dev/zero of=3Dimx8mp-boot.rom bs=3D1 count=3D258048`.
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
---
MAINTAINERS | 1 +
include/hw/arm/fsl-imx8mp.h | 1 +
hw/arm/fsl-imx8mp.c | 18 ++++++++++++++++++
pc-bios/imx8mp-boot.rom | Bin 0 -> 258048 bytes
pc-bios/meson.build | 1 +
5 files changed, 21 insertions(+)
create mode 100644 pc-bios/imx8mp-boot.rom
diff --git a/MAINTAINERS b/MAINTAINERS
index 2e7fc6fa91..489e426d85 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -831,6 +831,7 @@ F: hw/pci-host/fsl_imx8m_phy.c
F: include/hw/arm/fsl-imx8mp.h
F: include/hw/misc/imx8mp_*.h
F: include/hw/pci-host/fsl_imx8m_phy.h
+F: pc-bios/imx8mp*
F: docs/system/arm/imx8mp-evk.rst
=20
MPS2 / MPS3
diff --git a/include/hw/arm/fsl-imx8mp.h b/include/hw/arm/fsl-imx8mp.h
index 5247e972b8..4dbe30f524 100644
--- a/include/hw/arm/fsl-imx8mp.h
+++ b/include/hw/arm/fsl-imx8mp.h
@@ -68,6 +68,7 @@ struct FslImx8mpState {
DesignwarePCIEHost pcie;
FslImx8mPciePhyState pcie_phy;
OrIRQState gpt5_gpt6_irq;
+ MemoryRegion boot_rom;
=20
uint32_t phy_num;
bool phy_connected;
diff --git a/hw/arm/fsl-imx8mp.c b/hw/arm/fsl-imx8mp.c
index f0d5980300..f26cf5984e 100644
--- a/hw/arm/fsl-imx8mp.c
+++ b/hw/arm/fsl-imx8mp.c
@@ -9,12 +9,14 @@
*/
=20
#include "qemu/osdep.h"
+#include "qemu/datadir.h"
#include "exec/address-spaces.h"
#include "hw/arm/bsa.h"
#include "hw/arm/fsl-imx8mp.h"
#include "hw/intc/arm_gicv3.h"
#include "hw/misc/unimp.h"
#include "hw/boards.h"
+#include "hw/loader.h"
#include "system/system.h"
#include "target/arm/cpu-qom.h"
#include "qapi/error.h"
@@ -263,6 +265,7 @@ static void fsl_imx8mp_realize(DeviceState *dev, Error =
**errp)
MachineState *ms =3D MACHINE(qdev_get_machine());
FslImx8mpState *s =3D FSL_IMX8MP(dev);
DeviceState *gicdev =3D DEVICE(&s->gic);
+ g_autofree char *filename =3D NULL;
int i;
=20
if (ms->smp.cpus > FSL_IMX8MP_NUM_CPUS) {
@@ -644,10 +647,25 @@ static void fsl_imx8mp_realize(DeviceState *dev, Erro=
r **errp)
sysbus_mmio_map(SYS_BUS_DEVICE(&s->pcie_phy), 0,
fsl_imx8mp_memmap[FSL_IMX8MP_PCIE_PHY1].addr);
=20
+ /* ROM memory */
+ if (!memory_region_init_rom(&s->boot_rom, OBJECT(dev),
+ fsl_imx8mp_memmap[FSL_IMX8MP_BOOT_ROM].nam=
e,
+ fsl_imx8mp_memmap[FSL_IMX8MP_BOOT_ROM].siz=
e,
+ errp)) {
+ return;
+ }
+ filename =3D qemu_find_file(QEMU_FILE_TYPE_BIOS, "imx8mp-boot.rom");
+ load_image_size(filename, memory_region_get_ram_ptr(&s->boot_rom),
+ memory_region_size(&s->boot_rom));
+ memory_region_add_subregion(get_system_memory(),
+ fsl_imx8mp_memmap[FSL_IMX8MP_BOOT_ROM].add=
r,
+ &s->boot_rom);
+
/* Unimplemented devices */
for (i =3D 0; i < ARRAY_SIZE(fsl_imx8mp_memmap); i++) {
switch (i) {
case FSL_IMX8MP_ANA_PLL:
+ case FSL_IMX8MP_BOOT_ROM:
case FSL_IMX8MP_CCM:
case FSL_IMX8MP_GIC_DIST:
case FSL_IMX8MP_GIC_REDIST:
diff --git a/pc-bios/imx8mp-boot.rom b/pc-bios/imx8mp-boot.rom
new file mode 100644
index 0000000000000000000000000000000000000000..5324b5eed200e723d048f8476e4=
d96d45622fd4d
GIT binary patch
literal 258048
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zV8DO@0|pEjFkrxd0RsjM7%*VKfB^#r3>YwAz<>b*1`HT5V8DO@0|pEjFkrxd0RsjM
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E2JkHa0RR91
literal 0
HcmV?d00001
diff --git a/pc-bios/meson.build b/pc-bios/meson.build
index 51e95cc903..50506a7895 100644
--- a/pc-bios/meson.build
+++ b/pc-bios/meson.build
@@ -60,6 +60,7 @@ blobs =3D [
'efi-virtio.rom',
'efi-e1000e.rom',
'efi-vmxnet3.rom',
+ 'imx8mp-boot.rom',
'qemu-nsis.bmp',
'multiboot.bin',
'multiboot_dma.bin',
--=20
2.48.1