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hw/misc: Allwinner A10 DRAM Controller Emulation

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During SPL boot several DRAM Controller registers are used. Most
important registers are those related to DRAM initialization and
calibration, where SPL initiates process and waits until certain bit is
set/cleared.

This patch adds these registers, initializes reset values from user's
guide and updates state of registers as SPL expects it.

Signed-off-by: Strahinja Jankovic <strahinja.p.jankovic@gmail.com>

Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>
Message-id: 20221226220303.14420-3-strahinja.p.jankovic@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Strahinja Jankovic 2022-12-26 23:02:58 +01:00 • committed by Peter Maydell
parent 423ec28bb8
commit edd3a59d5b
7 changed files with 261 additions and 0 deletions
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7
hw/arm/allwinner-a10.c
View file

@ -25,6 +25,7 @@
#include "hw/boards.h"
#include "hw/usb/hcd-ohci.h"
#define AW_A10_DRAMC_BASE 0x01c01000
#define AW_A10_MMC0_BASE 0x01c0f000
#define AW_A10_CCM_BASE 0x01c20000
#define AW_A10_PIC_REG_BASE 0x01c20400
@ -49,6 +50,8 @@ static void aw_a10_init(Object *obj)
object_initialize_child(obj, "ccm", &s->ccm, TYPE_AW_A10_CCM);
object_initialize_child(obj, "dramc", &s->dramc, TYPE_AW_A10_DRAMC);
object_initialize_child(obj, "emac", &s->emac, TYPE_AW_EMAC);
object_initialize_child(obj, "sata", &s->sata, TYPE_ALLWINNER_AHCI);
@ -110,6 +113,10 @@ static void aw_a10_realize(DeviceState *dev, Error **errp)
sysbus_realize(SYS_BUS_DEVICE(&s->ccm), &error_fatal);
sysbus_mmio_map(SYS_BUS_DEVICE(&s->ccm), 0, AW_A10_CCM_BASE);
/* DRAM Control Module */
sysbus_realize(SYS_BUS_DEVICE(&s->dramc), &error_fatal);
sysbus_mmio_map(SYS_BUS_DEVICE(&s->dramc), 0, AW_A10_DRAMC_BASE);
/* FIXME use qdev NIC properties instead of nd_table[] */
if (nd_table[0].used) {
qemu_check_nic_model(&nd_table[0], TYPE_AW_EMAC);