feat(mmc): get boot partition size
The boot partition size of an eMMC is given in ext_csd register, at
offset 226 (BOOT_SIZE_MULT), which has to be multiplied by 128kB.
Add a helper function mmc_boot_part_size() to get this eMMC boot
partition size.
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I0e8e0fc9632f147fa1b1b3374accb78439025403
diff --git a/include/drivers/mmc.h b/include/drivers/mmc.h
index e973248..e94693d 100644
--- a/include/drivers/mmc.h
+++ b/include/drivers/mmc.h
@@ -62,6 +62,7 @@
#define CMD_EXTCSD_HS_TIMING 185
#define CMD_EXTCSD_PART_SWITCH_TIME 199
#define CMD_EXTCSD_SEC_CNT 212
+#define CMD_EXTCSD_BOOT_SIZE_MULT 226
#define EXT_CSD_PART_CONFIG_ACC_MASK GENMASK(2, 0)
#define PART_CFG_BOOT_PARTITION1_ENABLE (U(1) << 3)
@@ -262,6 +263,7 @@
size_t mmc_erase_blocks(int lba, size_t size);
int mmc_part_switch_current_boot(void);
int mmc_part_switch_user(void);
+size_t mmc_boot_part_size(void);
size_t mmc_boot_part_read_blocks(int lba, uintptr_t buf, size_t size);
int mmc_init(const struct mmc_ops *ops_ptr, unsigned int clk,
unsigned int width, unsigned int flags,