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hw/arm: Allwinner A10 enable SPL load from MMC

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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>
This commit is contained in:
Strahinja Jankovic 2022-12-26 23:03:02 +01:00 committed by Peter Maydell
parent 28057e490b
commit bb9271cadb
3 changed files with 44 additions and 0 deletions
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18
hw/arm/allwinner-a10.c
View File

@ -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);
}
static void aw_a10_init(Object *obj)
{
AwA10State *s = AW_A10(obj);

5
hw/arm/cubieboard.c
View File

@ -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;

21
include/hw/arm/allwinner-a10.h
View File

@ -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"
#include "target/arm/cpu.h"
#include "qom/object.h"
@ -48,4 +49,24 @@ 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 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