From 29a3a09f9155e5de69d6d2a4bf582a9e09b8e0a4 Mon Sep 17 00:00:00 2001 From: Nikolai Artemiev Date: Mon, 21 Nov 2022 19:29:57 +1100 Subject: writeprotect: Add function to get register values and WP bit masks Add a new wp_cfg_to_reg_values() function that takes a generic wp_cfg instance and returns the chip-specific values that need to be written to the chip's registers to enable the specified protection range/mode. The function returns three values for each chip register: - reg_values[reg] - Value writeprotect will write to reg - bit_masks[reg] - Bit mask for WP-related bits in reg - write_masks[reg] - Bit mask for writable WP-related bits in reg (i.e. the ones writeprotect will try to write) BUG=b:260019525,b:259013033,260020006 BRANCH=none TEST=ninja test Change-Id: Ib2a47153b230c9f82bb4eca357c335f2abbacc20 Signed-off-by: Nikolai Artemiev Reviewed-on: https://review.coreboot.org/c/flashrom/+/69847 Reviewed-by: Edward O'Callaghan Tested-by: build bot (Jenkins) Reviewed-by: Sergii Dmytruk --- writeprotect.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) (limited to 'writeprotect.c') diff --git a/writeprotect.c b/writeprotect.c index d8ffa689..411089de 100644 --- a/writeprotect.c +++ b/writeprotect.c @@ -597,3 +597,31 @@ out: free(range_pairs); return ret; } + +enum flashrom_wp_result wp_cfg_to_reg_values( + uint8_t *reg_values, uint8_t *bit_masks, uint8_t *write_masks, + struct flashctx *flash, const struct flashrom_wp_cfg *cfg) +{ + struct wp_bits bits; + + if (!chip_supported(flash)) + return FLASHROM_WP_ERR_CHIP_UNSUPPORTED; + + enum flashrom_wp_result ret = read_wp_bits(&bits, flash); + if (ret != FLASHROM_WP_OK) + return ret; + + /* Set protection range */ + ret = set_wp_range(&bits, flash, cfg->range); + if (ret != FLASHROM_WP_OK) + return ret; + + /* Set protection mode */ + ret = set_wp_mode(&bits, cfg->mode); + if (ret != FLASHROM_WP_OK) + return ret; + + get_wp_bits_reg_values(reg_values, bit_masks, write_masks, &flash->chip->reg_bits, bits); + + return FLASHROM_WP_OK; +} -- cgit v1.2.3