From: Joel Stanley <joel@jms.id.au>
This assumes a specially constructed image:
dd if=/dev/zero of=mmc-bootarea.img count=2 bs=1M
dd if=u-boot-spl.bin of=mmc-bootarea.img conv=notrunc
dd if=u-boot.bin of=mmc-bootarea.img conv=notrunc count=64 bs=1K
cat mmc-bootarea.img obmc-phosphor-image.wic > mmc.img
truncate --size 16GB mmc.img
truncate --size 128MB mmc-bootarea.img
For now this still requires a mtd image to load the SPL:
qemu-system-arm -M tacoma-bmc -nographic \
-global driver=sd-card,property=emmc,value=true \
-drive file=mmc.img,if=sd,index=2 \
-drive file=mmc-bootarea.img,if=mtd,format=raw
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
include/hw/sd/sd.h | 1 +
hw/sd/sd.c | 39 +++++++++++++++++++++++++++++++++++++++
2 files changed, 40 insertions(+)
diff --git a/include/hw/sd/sd.h b/include/hw/sd/sd.h
index d35a839f5e..07435d2e17 100644
--- a/include/hw/sd/sd.h
+++ b/include/hw/sd/sd.h
@@ -132,6 +132,7 @@ struct SDCardClass {
bool (*get_readonly)(SDState *sd);
void (*set_cid)(SDState *sd);
void (*set_csd)(SDState *sd, uint64_t size);
+ uint32_t (*bootpart_offset)(SDState *sd);
const struct SDProto *proto;
};
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index e7d8b9c0fb..2d49be61f6 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -783,6 +783,12 @@ static inline uint64_t sd_addr_to_wpnum(uint64_t addr)
return addr >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT);
}
+
+static unsigned sd_boot_capacity_bytes(SDState *sd)
+{
+ return sd->ext_csd[EXT_CSD_BOOT_MULT] << 17;
+}
+
static void sd_reset(DeviceState *dev)
{
SDState *sd = SD_CARD(dev);
@@ -984,9 +990,40 @@ void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert)
qemu_set_irq(insert, sd->blk ? blk_is_inserted(sd->blk) : 0);
}
+/*
+ * This requires a disk image that has two boot partitions inserted at the
+ * beginning of it. The size of the boot partitions are configured in the
+ * ext_csd structure, which is hardcoded in qemu. They are currently set to
+ * 1MB each.
+ */
+static uint32_t sd_emmc_bootpart_offset(SDState *sd)
+{
+ unsigned int access = sd->ext_csd[EXT_CSD_PART_CONFIG] &
+ EXT_CSD_PART_CONFIG_ACC_MASK;
+ unsigned int boot_capacity = sd_boot_capacity_bytes(sd);
+
+ switch (access) {
+ case EXT_CSD_PART_CONFIG_ACC_DEFAULT:
+ return boot_capacity * 2;
+ case EXT_CSD_PART_CONFIG_ACC_BOOT0:
+ return 0;
+ case EXT_CSD_PART_CONFIG_ACC_BOOT0 + 1:
+ return boot_capacity * 1;
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static uint32_t sd_bootpart_offset(SDState *sd)
+{
+ SDCardClass *sc = SD_CARD_GET_CLASS(sd);
+ return sc->bootpart_offset ? sc->bootpart_offset(sd) : 0;
+}
+
static void sd_blk_read(SDState *sd, uint64_t addr, uint32_t len)
{
trace_sdcard_read_block(addr, len);
+ addr += sd_bootpart_offset(sd);
if (!sd->blk || blk_pread(sd->blk, addr, len, sd->data, 0) < 0) {
fprintf(stderr, "sd_blk_read: read error on host side\n");
}
@@ -995,6 +1032,7 @@ static void sd_blk_read(SDState *sd, uint64_t addr, uint32_t len)
static void sd_blk_write(SDState *sd, uint64_t addr, uint32_t len)
{
trace_sdcard_write_block(addr, len);
+ addr += sd_bootpart_offset(sd);
if (!sd->blk || blk_pwrite(sd->blk, addr, len, sd->data, 0) < 0) {
fprintf(stderr, "sd_blk_write: write error on host side\n");
}
@@ -2833,6 +2871,7 @@ static void emmc_class_init(ObjectClass *klass, void *data)
dc->realize = emmc_realize;
sc->proto = &sd_proto_emmc;
sc->set_csd = sd_emmc_set_csd;
+ sc->bootpart_offset = sd_emmc_bootpart_offset;
}
static const TypeInfo sd_types[] = {
--
2.41.0