On 5/7/24 07:38, Cédric Le Goater wrote:
On 7/5/24 5:41 AM, Andrew Jeffery wrote:
On Thu, 2024-07-04 at 07:36 +0200, Cédric Le Goater wrote:
From: Cédric Le Goater <c...@kaod.org>
When the boot-from-eMMC HW strapping bit is set, use the 'boot-config'
property to set the boot config register to boot from the first boot
area partition of the eMMC device.
Signed-off-by: Cédric Le Goater <c...@kaod.org>
---
hw/arm/aspeed.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index 756deb91efd1..135f4eb72215 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -327,7 +327,8 @@ void aspeed_board_init_flashes(AspeedSMCState *s,
const char *flashtype,
}
}
-static void sdhci_attach_drive(SDHCIState *sdhci, DriveInfo *dinfo,
bool emmc)
+static void sdhci_attach_drive(SDHCIState *sdhci, DriveInfo *dinfo,
bool emmc,
+ bool boot_emmc)
{
DeviceState *card;
@@ -335,6 +336,9 @@ static void sdhci_attach_drive(SDHCIState *sdhci,
DriveInfo *dinfo, bool emmc)
return;
}
card = qdev_new(emmc ? TYPE_EMMC : TYPE_SD_CARD);
+ if (emmc) {
+ qdev_prop_set_uint8(card, "boot-config", boot_emmc ?
0x48 : 0x0);
0x48 feels a little bit magic. I poked around a bit and there are some
boot-config macros, but not the ones you need and they're all in an
"internal" header anyway. I guess this is fine for now?
You are right and we should be using these :
hw/sd/sdmmc-internal.h:#define EXT_CSD_PART_CONFIG 179
/* R/W */
This field is R/W and expected to be configured by the guest.
Why the guest (u-boot) doesn't detect partitioning support?
See eMMC v4.5 section 7.4.60 PARTITIONING_SUPPORT [160] and earlier
For e•MMC 4.5 Devices, Bit 2-0 in PARTITIONING_SUPPORT
shall be set to 1.
We don't set it so far.
I see in u-boot mmc_startup_v4():
/* store the partition info of emmc */
mmc->part_support = ext_csd[EXT_CSD_PARTITIONING_SUPPORT];
if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) ||
ext_csd[EXT_CSD_BOOT_MULT])
mmc->part_config = ext_csd[EXT_CSD_PART_CONF];
if (part_completed &&
(ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & ENHNCD_SUPPORT))
mmc->part_attr = ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE];
I'm still waiting for the eMMC prerequisite to be reviewed
before looking at the eMMC patches in detail :/
Regards,
Phil.
