diff options
| author | Neha Malcom Francis <[email protected]> | 2025-08-12 18:13:18 +0530 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2025-08-19 11:26:19 -0600 |
| commit | 1c70e33b0aca6d5d84145636400e496feb19c8b9 (patch) | |
| tree | d940ad238e154990ec83b11de6cec033099be1ca /drivers/ram | |
| parent | e511c651f6dd0ec89a4b7dec25140540740cf13e (diff) | |
ram: k3-ddrss: Add comment about ecc_reserved_space
The reserved space needed for storing the parity remains the same no
matter the size of the region that is being protected. Add this as a
comment for better code understanding.
Reviewed-by: Udit Kumar <[email protected]>
Signed-off-by: Neha Malcom Francis <[email protected]>
Diffstat (limited to 'drivers/ram')
| -rw-r--r-- | drivers/ram/k3-ddrss/k3-ddrss.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/ram/k3-ddrss/k3-ddrss.c b/drivers/ram/k3-ddrss/k3-ddrss.c index 2fdbd4609a8..d35adc840f4 100644 --- a/drivers/ram/k3-ddrss/k3-ddrss.c +++ b/drivers/ram/k3-ddrss/k3-ddrss.c @@ -737,6 +737,12 @@ static void k3_ddrss_lpddr4_ecc_calc_reserved_mem(struct k3_ddrss_desc *ddrss) { fdtdec_setup_mem_size_base_lowest(); + /* + * For every 512-byte data block, 64 bytes are used to store inline ECC + * information into a reserved region. It remains 1/9th of the total DDR + * size irrespective of the size of the region under protection. + */ + ddrss->ecc_reserved_space = ddrss->ddr_ram_size; do_div(ddrss->ecc_reserved_space, 9); |