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>
---
hw/arm/allwinner-a10.c | 18 ++++++++++++++++++
hw/arm/cubieboard.c | 5 +++++
include/hw/arm/allwinner-a10.h | 21 +++++++++++++++++++++
3 files changed, 44 insertions(+)
diff --git a/hw/arm/allwinner-a10.c b/hw/arm/allwinner-a10.c
index 17e439777e..dc1966ff7a 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"
+#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
+void allwinner_a10_bootrom_setup(AwA10State *s, BlockBackend *blk)
+{
+ const int64_t rom_size = 32 * KiB;
+ g_autofree uint8_t *buffer = 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);
+}
Its probably fine for now to do it in the same way here for the A10 indeed. Perhaps in the future, we can try
to share some overlapping code between the A10 and H3.
So the patch looks fine to me:
Regards,
Niek
+
static void aw_a10_init(Object *obj)
{
AwA10State *s = AW_A10(obj);
diff --git a/hw/arm/cubieboard.c b/hw/arm/cubieboard.c
index afc7980414..37659c35fd 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);
+ /* 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() */
cubieboard_binfo.ram_size = machine->ram_size;
diff --git a/include/hw/arm/allwinner-a10.h b/include/hw/arm/allwinner-a10.h
index 763935fca9..b3c9ed24c7 100644
--- a/include/hw/arm/allwinner-a10.h
+++ b/include/hw/arm/allwinner-a10.h
@@ -15,6 +15,7 @@
#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"
#include "target/arm/cpu.h"
#include "qom/object.h"
@@ -47,4 +48,24 @@ struct AwA10State {
OHCISysBusState ohci[AW_A10_NUM_USB];
};
+/**
+ * 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 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
--
2.30.2