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From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PULL 08/38] hw/arm: Allwinner A10 enable SPL load from MMC
Date: Fri, 13 Jan 2023 14:10:56 +0000
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From: Strahinja Jankovic <strahinjapjankovic@gmail.com>
This patch enables copying of SPL from MMC if `-kernel` parameter is not
passed when starting QEMU. SPL is copied to SRAM_A.
The approach is reused from Allwinner H3 implementation.
Tested with Armbian and custom Yocto image.
Signed-off-by: Strahinja Jankovic <strahinja.p.jankovic@gmail.com>
Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20221226220303.14420-7-strahinja.p.jankovic@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
include/hw/arm/allwinner-a10.h | 21 +++++++++++++++++++++
hw/arm/allwinner-a10.c | 18 ++++++++++++++++++
hw/arm/cubieboard.c | 5 +++++
3 files changed, 44 insertions(+)
diff --git a/include/hw/arm/allwinner-a10.h b/include/hw/arm/allwinner-a10.h
index e569e661095..e0f2f7ab198 100644
--- a/include/hw/arm/allwinner-a10.h
+++ b/include/hw/arm/allwinner-a10.h
@@ -16,6 +16,7 @@
#include "hw/misc/allwinner-a10-ccm.h"
#include "hw/misc/allwinner-a10-dramc.h"
#include "hw/i2c/allwinner-i2c.h"
+#include "sysemu/block-backend.h"
=20
#include "target/arm/cpu.h"
#include "qom/object.h"
@@ -48,4 +49,24 @@ struct AwA10State {
OHCISysBusState ohci[AW_A10_NUM_USB];
};
=20
+/**
+ * Emulate Boot ROM firmware setup functionality.
+ *
+ * A real Allwinner A10 SoC contains a Boot ROM
+ * which is the first code that runs right after
+ * the SoC is powered on. The Boot ROM is responsible
+ * for loading user code (e.g. a bootloader) from any
+ * of the supported external devices and writing the
+ * downloaded code to internal SRAM. After loading the SoC
+ * begins executing the code written to SRAM.
+ *
+ * This function emulates the Boot ROM by copying 32 KiB
+ * of data at offset 8 KiB from the given block device and writes it to
+ * the start of the first internal SRAM memory.
+ *
+ * @s: Allwinner A10 state object pointer
+ * @blk: Block backend device object pointer
+ */
+void allwinner_a10_bootrom_setup(AwA10State *s, BlockBackend *blk);
+
#endif
diff --git a/hw/arm/allwinner-a10.c b/hw/arm/allwinner-a10.c
index 17e439777e4..dc1966ff7a2 100644
--- a/hw/arm/allwinner-a10.c
+++ b/hw/arm/allwinner-a10.c
@@ -24,7 +24,9 @@
#include "sysemu/sysemu.h"
#include "hw/boards.h"
#include "hw/usb/hcd-ohci.h"
+#include "hw/loader.h"
=20
+#define AW_A10_SRAM_A_BASE 0x00000000
#define AW_A10_DRAMC_BASE 0x01c01000
#define AW_A10_MMC0_BASE 0x01c0f000
#define AW_A10_CCM_BASE 0x01c20000
@@ -38,6 +40,22 @@
#define AW_A10_RTC_BASE 0x01c20d00
#define AW_A10_I2C0_BASE 0x01c2ac00
=20
+void allwinner_a10_bootrom_setup(AwA10State *s, BlockBackend *blk)
+{
+ const int64_t rom_size =3D 32 * KiB;
+ g_autofree uint8_t *buffer =3D g_new0(uint8_t, rom_size);
+
+ if (blk_pread(blk, 8 * KiB, rom_size, buffer, 0) < 0) {
+ error_setg(&error_fatal, "%s: failed to read BlockBackend data",
+ __func__);
+ return;
+ }
+
+ rom_add_blob("allwinner-a10.bootrom", buffer, rom_size,
+ rom_size, AW_A10_SRAM_A_BASE,
+ NULL, NULL, NULL, NULL, false);
+}
+
static void aw_a10_init(Object *obj)
{
AwA10State *s =3D AW_A10(obj);
diff --git a/hw/arm/cubieboard.c b/hw/arm/cubieboard.c
index dca257620d0..71a7df15083 100644
--- a/hw/arm/cubieboard.c
+++ b/hw/arm/cubieboard.c
@@ -99,6 +99,11 @@ static void cubieboard_init(MachineState *machine)
memory_region_add_subregion(get_system_memory(), AW_A10_SDRAM_BASE,
machine->ram);
=20
+ /* Load target kernel or start using BootROM */
+ if (!machine->kernel_filename && blk && blk_is_available(blk)) {
+ /* Use Boot ROM to copy data from SD card to SRAM */
+ allwinner_a10_bootrom_setup(a10, blk);
+ }
/* TODO create and connect IDE devices for ide_drive_get() */
=20
cubieboard_binfo.ram_size =3D machine->ram_size;
--=20
2.34.1