Don't make EEPROM size assumptions with dynamic keymaps. (#16054)

* Don't make EEPROM size assumptions with dynamic keymaps. * Add support for checking against emulated flash, error out if someone attempts to build a board without specifying EEPROM size. * Reorder defines so that MCU is considered last. * Refactor EEPROM definitions for simplicity. * Fix max sizing of kabedon/kabedon980. * Fix max sizing of mechlovin/olly/jf. * Fix unit tests. * Review comments, add messages with values during build failures.
2022-02-02 15:04:37 +11:00 · 2022-02-02 15:04:37 +11:00 · e22efc037a
commit e22efc037a
parent da5cb5fd6f
17 changed files with 185 additions and 153 deletions
--- a/common_features.mk
+++ b/common_features.mk
@ -186,20 +186,21 @@ else
    else ifeq ($(PLATFORM),CHIBIOS)
      ifneq ($(filter STM32F3xx_% STM32F1xx_% %_STM32F401xC %_STM32F401xE %_STM32F405xG %_STM32F411xE %_STM32F072xB %_STM32F042x6 %_GD32VF103xB %_GD32VF103x8, $(MCU_SERIES)_$(MCU_LDSCRIPT)),)
        # Emulated EEPROM
-        OPT_DEFS += -DEEPROM_DRIVER
+        OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_STM32_FLASH_EMULATED
        COMMON_VPATH += $(DRIVER_PATH)/eeprom
        SRC += eeprom_driver.c
        SRC += $(PLATFORM_COMMON_DIR)/eeprom_stm32.c
        SRC += $(PLATFORM_COMMON_DIR)/flash_stm32.c
      else ifneq ($(filter $(MCU_SERIES),STM32L0xx STM32L1xx),)
        # True EEPROM on STM32L0xx, L1xx
-        OPT_DEFS += -DEEPROM_DRIVER
+        OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_STM32_L0_L1
        COMMON_VPATH += $(DRIVER_PATH)/eeprom
        COMMON_VPATH += $(PLATFORM_PATH)/$(PLATFORM_KEY)/$(DRIVER_DIR)/eeprom
        SRC += eeprom_driver.c
        SRC += eeprom_stm32_L0_L1.c
      else ifneq ($(filter $(MCU_SERIES),KL2x K20x),)
        # Teensy EEPROM implementations
+        OPT_DEFS += -DEEPROM_TEENSY
        SRC += eeprom_teensy.c
      else
        # Fall back to transient, i.e. non-persistent
@ -209,9 +210,11 @@ else
      endif
    else ifeq ($(PLATFORM),ARM_ATSAM)
      # arm_atsam EEPROM
-      SRC += $(PLATFORM_COMMON_DIR)/eeprom.c
+      OPT_DEFS += -DEEPROM_SAMD
+      SRC += $(PLATFORM_COMMON_DIR)/eeprom_samd.c
    else ifeq ($(PLATFORM),TEST)
      # Test harness "EEPROM"
+      OPT_DEFS += -DEEPROM_TEST_HARNESS
      SRC += $(PLATFORM_COMMON_DIR)/eeprom.c
    endif
  endif
--- a/keyboards/kabedon/kabedon980/config.h
+++ b/keyboards/kabedon/kabedon980/config.h
@ -35,7 +35,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_ROW_PINS {D0,D2,F7,B1,B0,D6,C7,D7,B5,B2}
 #define MATRIX_COL_PINS {F5,F4,F6,C6,B6,B4,D3,D1,D4,F1,B3,D5,F0}
 #define UNUSED_PINS
-#define DYNAMIC_KEYMAP_EEPROM_MAX_ADDR 2047
+#define DYNAMIC_KEYMAP_LAYER_COUNT 3
 /* COL2ROW, ROW2COL*/
 #define DIODE_DIRECTION ROW2COL

--- a/keyboards/kabedon/kabedon980/keymaps/via/keymap.c
+++ b/keyboards/kabedon/kabedon980/keymaps/via/keymap.c
@ -25,13 +25,5 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,     KC_TRNS,         KC_TRNS, KC_TRNS, KC_TRNS,
    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS,    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
    KC_TRNS, KC_TRNS, KC_TRNS,                   KC_TRNS,                            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,   KC_TRNS,      KC_TRNS ),
-    
-  [3] = LAYOUT(
-    KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, 
-    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,     KC_TRNS,         KC_TRNS, KC_TRNS, KC_TRNS, 
-    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS,    KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-    KC_TRNS, KC_TRNS, KC_TRNS,                   KC_TRNS,                            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,   KC_TRNS,      KC_TRNS )
 };

--- a/keyboards/mechlovin/olly/jf/keymaps/via/config.h
+++ b/keyboards/mechlovin/olly/jf/keymaps/via/config.h
@ -17,6 +17,4 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.

 #pragma once

-#define DYNAMIC_KEYMAP_EEPROM_MAX_ADDR 1607
-#define DYNAMIC_KEYMAP_LAYER_COUNT 6
-
+#define DYNAMIC_KEYMAP_LAYER_COUNT 3
--- a/keyboards/mechlovin/olly/jf/keymaps/via/keymap.c
+++ b/keyboards/mechlovin/olly/jf/keymaps/via/keymap.c
@ -40,29 +40,4 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                   KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
        KC_TRNS,  KC_TRNS, KC_TRNS,                            KC_TRNS,                            KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS
    ),
-    [3] = LAYOUT_all(
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                   KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                   KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                   KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS,                            KC_TRNS,                            KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS
-    ),
-    [4] = LAYOUT_all(
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                   KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                   KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                   KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS,                            KC_TRNS,                            KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS
-    ),
-    [5] = LAYOUT_all(
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                   KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                   KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,                   KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
-        KC_TRNS,  KC_TRNS, KC_TRNS,                            KC_TRNS,                            KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS,          KC_TRNS, KC_TRNS, KC_TRNS
-    ),
-
 };
--- a/platforms/arm_atsam/eeprom_samd.c
+++ b/platforms/arm_atsam/eeprom_samd.c
@ -18,11 +18,7 @@
 #include "samd51j18a.h"
 #include "core_cm4.h"
 #include "component/nvmctrl.h"
-
-#ifndef EEPROM_SIZE
-#    include "eeconfig.h"
-#    define EEPROM_SIZE (((EECONFIG_SIZE + 3) / 4) * 4)  // based off eeconfig's current usage, aligned to 4-byte sizes, to deal with LTO
-#endif
+#include "eeprom_samd.h"

 #ifndef MAX
 #    define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
--- a/platforms/arm_atsam/eeprom_samd.h
+++ b/platforms/arm_atsam/eeprom_samd.h
@ -0,0 +1,8 @@
+// Copyright 2022 Nick Brassel (@tzarc)
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#ifndef EEPROM_SIZE
+#    include "eeconfig.h"
+#    define EEPROM_SIZE (((EECONFIG_SIZE + 3) / 4) * 4)  // based off eeconfig's current usage, aligned to 4-byte sizes, to deal with LTO
+#endif
--- a/platforms/chibios/eeprom_stm32.c
+++ b/platforms/chibios/eeprom_stm32.c
@ -133,10 +133,6 @@
 */

 #include "eeprom_stm32_defs.h"
-#if !defined(FEE_PAGE_SIZE) || !defined(FEE_PAGE_COUNT) || !defined(FEE_MCU_FLASH_SIZE) || !defined(FEE_PAGE_BASE_ADDRESS)
-#    error "not implemented."
-#endif
-
 /* These bits are used for optimizing encoding of bytes, 0 and 1 */
 #define FEE_WORD_ENCODING 0x8000
 #define FEE_VALUE_NEXT 0x6000
@ -144,69 +140,11 @@
 #define FEE_VALUE_ENCODED 0x2000
 #define FEE_BYTE_RANGE 0x80

-/* Addressable range 16KByte: 0 <-> (0x1FFF << 1) */
-#define FEE_ADDRESS_MAX_SIZE 0x4000
-
 /* Flash word value after erase */
 #define FEE_EMPTY_WORD ((uint16_t)0xFFFF)

-/* Size of combined compacted eeprom and write log pages */
-#define FEE_DENSITY_MAX_SIZE (FEE_PAGE_COUNT * FEE_PAGE_SIZE)
-
-#ifndef FEE_MCU_FLASH_SIZE_IGNORE_CHECK /* *TODO: Get rid of this check */
-#    if FEE_DENSITY_MAX_SIZE > (FEE_MCU_FLASH_SIZE * 1024)
-#        pragma message STR(FEE_DENSITY_MAX_SIZE) " > " STR(FEE_MCU_FLASH_SIZE * 1024)
-#        error emulated eeprom: FEE_DENSITY_MAX_SIZE is greater than available flash size
-#    endif
-#endif
-
-/* Size of emulated eeprom */
-#ifdef FEE_DENSITY_BYTES
-#    if (FEE_DENSITY_BYTES > FEE_DENSITY_MAX_SIZE)
-#        pragma message STR(FEE_DENSITY_BYTES) " > " STR(FEE_DENSITY_MAX_SIZE)
-#        error emulated eeprom: FEE_DENSITY_BYTES exceeds FEE_DENSITY_MAX_SIZE
-#    endif
-#    if (FEE_DENSITY_BYTES == FEE_DENSITY_MAX_SIZE)
-#        pragma message STR(FEE_DENSITY_BYTES) " == " STR(FEE_DENSITY_MAX_SIZE)
-#        warning emulated eeprom: FEE_DENSITY_BYTES leaves no room for a write log.  This will greatly increase the flash wear rate!
-#    endif
-#    if FEE_DENSITY_BYTES > FEE_ADDRESS_MAX_SIZE
-#        pragma message STR(FEE_DENSITY_BYTES) " > " STR(FEE_ADDRESS_MAX_SIZE)
-#        error emulated eeprom: FEE_DENSITY_BYTES is greater than FEE_ADDRESS_MAX_SIZE allows
-#    endif
-#    if ((FEE_DENSITY_BYTES) % 2) == 1
-#        error emulated eeprom: FEE_DENSITY_BYTES must be even
-#    endif
-#else
-/* Default to half of allocated space used for emulated eeprom, half for write log */
-#    define FEE_DENSITY_BYTES (FEE_PAGE_COUNT * FEE_PAGE_SIZE / 2)
-#endif
-
-/* Size of write log */
-#ifdef FEE_WRITE_LOG_BYTES
-#    if ((FEE_DENSITY_BYTES + FEE_WRITE_LOG_BYTES) > FEE_DENSITY_MAX_SIZE)
-#        pragma message STR(FEE_DENSITY_BYTES) " + " STR(FEE_WRITE_LOG_BYTES) " > " STR(FEE_DENSITY_MAX_SIZE)
-#        error emulated eeprom: FEE_WRITE_LOG_BYTES exceeds remaining FEE_DENSITY_MAX_SIZE
-#    endif
-#    if ((FEE_WRITE_LOG_BYTES) % 2) == 1
-#        error emulated eeprom: FEE_WRITE_LOG_BYTES must be even
-#    endif
-#else
-/* Default to use all remaining space */
-#    define FEE_WRITE_LOG_BYTES (FEE_PAGE_COUNT * FEE_PAGE_SIZE - FEE_DENSITY_BYTES)
-#endif
-
-/* Start of the emulated eeprom compacted flash area */
-#define FEE_COMPACTED_BASE_ADDRESS FEE_PAGE_BASE_ADDRESS
-/* End of the emulated eeprom compacted flash area */
-#define FEE_COMPACTED_LAST_ADDRESS (FEE_COMPACTED_BASE_ADDRESS + FEE_DENSITY_BYTES)
-/* Start of the emulated eeprom write log */
-#define FEE_WRITE_LOG_BASE_ADDRESS FEE_COMPACTED_LAST_ADDRESS
-/* End of the emulated eeprom write log */
-#define FEE_WRITE_LOG_LAST_ADDRESS (FEE_WRITE_LOG_BASE_ADDRESS + FEE_WRITE_LOG_BYTES)
-
-#if defined(DYNAMIC_KEYMAP_EEPROM_MAX_ADDR) && (DYNAMIC_KEYMAP_EEPROM_MAX_ADDR >= FEE_DENSITY_BYTES)
-#    error emulated eeprom: DYNAMIC_KEYMAP_EEPROM_MAX_ADDR is greater than the FEE_DENSITY_BYTES available
+#if !defined(FEE_PAGE_SIZE) || !defined(FEE_PAGE_COUNT) || !defined(FEE_MCU_FLASH_SIZE) || !defined(FEE_PAGE_BASE_ADDRESS)
+#    error "not implemented."
 #endif

 /* In-memory contents of emulated eeprom for faster access */
--- a/platforms/chibios/eeprom_stm32_defs.h
+++ b/platforms/chibios/eeprom_stm32_defs.h
@ -72,3 +72,65 @@
 #        define FEE_PAGE_BASE_ADDRESS ((uintptr_t)(FEE_FLASH_BASE) + FEE_MCU_FLASH_SIZE * 1024 - (FEE_PAGE_COUNT * FEE_PAGE_SIZE))
 #    endif
 #endif
+
+/* Addressable range 16KByte: 0 <-> (0x1FFF << 1) */
+#define FEE_ADDRESS_MAX_SIZE 0x4000
+
+/* Size of combined compacted eeprom and write log pages */
+#define FEE_DENSITY_MAX_SIZE (FEE_PAGE_COUNT * FEE_PAGE_SIZE)
+
+#ifndef FEE_MCU_FLASH_SIZE_IGNORE_CHECK /* *TODO: Get rid of this check */
+#    if FEE_DENSITY_MAX_SIZE > (FEE_MCU_FLASH_SIZE * 1024)
+#        pragma message STR(FEE_DENSITY_MAX_SIZE) " > " STR(FEE_MCU_FLASH_SIZE * 1024)
+#        error emulated eeprom: FEE_DENSITY_MAX_SIZE is greater than available flash size
+#    endif
+#endif
+
+/* Size of emulated eeprom */
+#ifdef FEE_DENSITY_BYTES
+#    if (FEE_DENSITY_BYTES > FEE_DENSITY_MAX_SIZE)
+#        pragma message STR(FEE_DENSITY_BYTES) " > " STR(FEE_DENSITY_MAX_SIZE)
+#        error emulated eeprom: FEE_DENSITY_BYTES exceeds FEE_DENSITY_MAX_SIZE
+#    endif
+#    if (FEE_DENSITY_BYTES == FEE_DENSITY_MAX_SIZE)
+#        pragma message STR(FEE_DENSITY_BYTES) " == " STR(FEE_DENSITY_MAX_SIZE)
+#        warning emulated eeprom: FEE_DENSITY_BYTES leaves no room for a write log.  This will greatly increase the flash wear rate!
+#    endif
+#    if FEE_DENSITY_BYTES > FEE_ADDRESS_MAX_SIZE
+#        pragma message STR(FEE_DENSITY_BYTES) " > " STR(FEE_ADDRESS_MAX_SIZE)
+#        error emulated eeprom: FEE_DENSITY_BYTES is greater than FEE_ADDRESS_MAX_SIZE allows
+#    endif
+#    if ((FEE_DENSITY_BYTES) % 2) == 1
+#        error emulated eeprom: FEE_DENSITY_BYTES must be even
+#    endif
+#else
+/* Default to half of allocated space used for emulated eeprom, half for write log */
+#    define FEE_DENSITY_BYTES (FEE_PAGE_COUNT * FEE_PAGE_SIZE / 2)
+#endif
+
+/* Size of write log */
+#ifdef FEE_WRITE_LOG_BYTES
+#    if ((FEE_DENSITY_BYTES + FEE_WRITE_LOG_BYTES) > FEE_DENSITY_MAX_SIZE)
+#        pragma message STR(FEE_DENSITY_BYTES) " + " STR(FEE_WRITE_LOG_BYTES) " > " STR(FEE_DENSITY_MAX_SIZE)
+#        error emulated eeprom: FEE_WRITE_LOG_BYTES exceeds remaining FEE_DENSITY_MAX_SIZE
+#    endif
+#    if ((FEE_WRITE_LOG_BYTES) % 2) == 1
+#        error emulated eeprom: FEE_WRITE_LOG_BYTES must be even
+#    endif
+#else
+/* Default to use all remaining space */
+#    define FEE_WRITE_LOG_BYTES (FEE_PAGE_COUNT * FEE_PAGE_SIZE - FEE_DENSITY_BYTES)
+#endif
+
+/* Start of the emulated eeprom compacted flash area */
+#define FEE_COMPACTED_BASE_ADDRESS FEE_PAGE_BASE_ADDRESS
+/* End of the emulated eeprom compacted flash area */
+#define FEE_COMPACTED_LAST_ADDRESS (FEE_COMPACTED_BASE_ADDRESS + FEE_DENSITY_BYTES)
+/* Start of the emulated eeprom write log */
+#define FEE_WRITE_LOG_BASE_ADDRESS FEE_COMPACTED_LAST_ADDRESS
+/* End of the emulated eeprom write log */
+#define FEE_WRITE_LOG_LAST_ADDRESS (FEE_WRITE_LOG_BASE_ADDRESS + FEE_WRITE_LOG_BYTES)
+
+#if defined(DYNAMIC_KEYMAP_EEPROM_MAX_ADDR) && (DYNAMIC_KEYMAP_EEPROM_MAX_ADDR >= FEE_DENSITY_BYTES)
+#    error emulated eeprom: DYNAMIC_KEYMAP_EEPROM_MAX_ADDR is greater than the FEE_DENSITY_BYTES available
+#endif
--- a/platforms/chibios/eeprom_teensy.c
+++ b/platforms/chibios/eeprom_teensy.c
@ -1,6 +1,7 @@
 #include <ch.h>
 #include <hal.h>

+#include "eeprom_teensy.h"
 #include "eeconfig.h"

 /*************************************/
@ -42,18 +43,6 @@
 #if defined(K20x) /* chip selection */
 /* Teensy 3.0, 3.1, 3.2; mchck; infinity keyboard */

-// The EEPROM is really RAM with a hardware-based backup system to
-// flash memory.  Selecting a smaller size EEPROM allows more wear
-// leveling, for higher write endurance.  If you edit this file,
-// set this to the smallest size your application can use.  Also,
-// due to Freescale's implementation, writing 16 or 32 bit words
-// (aligned to 2 or 4 byte boundaries) has twice the endurance
-// compared to writing 8 bit bytes.
-//
-#    ifndef EEPROM_SIZE
-#        define EEPROM_SIZE 32
-#    endif
-
 /*
    ^^^ Here be dragons:
        NXP AppNote AN4282 section 3.1 states that partitioning must only be done once.
@ -350,8 +339,6 @@ void do_flash_cmd(volatile uint8_t *fstat)
 extern uint32_t __eeprom_workarea_start__;
 extern uint32_t __eeprom_workarea_end__;

-#    define EEPROM_SIZE 128
-
 static uint32_t flashend = 0;

 void eeprom_initialize(void) {
--- a/platforms/chibios/eeprom_teensy.h
+++ b/platforms/chibios/eeprom_teensy.h
@ -0,0 +1,22 @@
+// Copyright 2022 Nick Brassel (@tzarc)
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#if defined(K20x)
+/* Teensy 3.0, 3.1, 3.2; mchck; infinity keyboard */
+// The EEPROM is really RAM with a hardware-based backup system to
+// flash memory.  Selecting a smaller size EEPROM allows more wear
+// leveling, for higher write endurance.  If you edit this file,
+// set this to the smallest size your application can use.  Also,
+// due to Freescale's implementation, writing 16 or 32 bit words
+// (aligned to 2 or 4 byte boundaries) has twice the endurance
+// compared to writing 8 bit bytes.
+//
+#    ifndef EEPROM_SIZE
+#        define EEPROM_SIZE 32
+#    endif
+#elif defined(KL2x) /* Teensy LC (emulated) */
+#    define EEPROM_SIZE 128
+#else
+#    error Unsupported Teensy EEPROM.
+#endif
--- a/platforms/eeprom.h
+++ b/platforms/eeprom.h
@ -1,3 +1,5 @@
+// Copyright 2018-2022 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
 #pragma once

 #if defined(__AVR__) && !defined(EEPROM_DRIVER)
@ -19,3 +21,50 @@ void     eeprom_update_word(uint16_t *__p, uint16_t __value);
 void     eeprom_update_dword(uint32_t *__p, uint32_t __value);
 void     eeprom_update_block(const void *__src, void *__dst, size_t __n);
 #endif
+
+#if defined(EEPROM_CUSTOM)
+#    ifndef EEPROM_SIZE
+#        error EEPROM_SIZE has not been defined for custom driver.
+#    endif
+#    define TOTAL_EEPROM_BYTE_COUNT (EEPROM_SIZE)
+#elif defined(EEPROM_TRANSIENT)
+#    include "eeprom_transient.h"
+#    define TOTAL_EEPROM_BYTE_COUNT (TRANSIENT_EEPROM_SIZE)
+#elif defined(EEPROM_I2C)
+#    include "eeprom_i2c.h"
+#    define TOTAL_EEPROM_BYTE_COUNT (EXTERNAL_EEPROM_BYTE_COUNT)
+#elif defined(EEPROM_SPI)
+#    include "eeprom_spi.h"
+#    define TOTAL_EEPROM_BYTE_COUNT (EXTERNAL_EEPROM_BYTE_COUNT)
+#elif defined(EEPROM_STM32_L0_L1)
+#    include "eeprom_stm32_L0_L1.h"
+#    define TOTAL_EEPROM_BYTE_COUNT (STM32_ONBOARD_EEPROM_SIZE)
+#elif defined(EEPROM_TEENSY)
+#    include "eeprom_teensy.h"
+#    define TOTAL_EEPROM_BYTE_COUNT (EEPROM_SIZE)
+#elif defined(EEPROM_STM32_FLASH_EMULATED)
+#    include "eeprom_stm32_defs.h"
+#    define TOTAL_EEPROM_BYTE_COUNT (FEE_DENSITY_BYTES)
+#elif defined(EEPROM_SAMD)
+#    include "eeprom_samd.h"
+#    define TOTAL_EEPROM_BYTE_COUNT (EEPROM_SIZE)
+#elif defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega16U4__) || defined(__AVR_AT90USB162__) || defined(__AVR_ATtiny85__)
+#    define TOTAL_EEPROM_BYTE_COUNT 512
+#elif defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega328P__) || defined(__AVR_ATmega32A__)
+#    define TOTAL_EEPROM_BYTE_COUNT 1024
+#elif defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__)
+#    define TOTAL_EEPROM_BYTE_COUNT 2048
+#elif defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
+#    define TOTAL_EEPROM_BYTE_COUNT 4096
+#elif defined(EEPROM_TEST_HARNESS)
+#    ifndef FLASH_STM32_MOCKED
+// Normal tests
+#        define TOTAL_EEPROM_BYTE_COUNT 32
+#    else
+// Flash wear-leveling testing
+#        include "eeprom_stm32_tests.h"
+#        define TOTAL_EEPROM_BYTE_COUNT (EEPROM_SIZE)
+#    endif
+#else
+#    error Unknown EEPROM driver.
+#endif
--- a/platforms/test/eeprom.c
+++ b/platforms/test/eeprom.c
@ -16,9 +16,7 @@

 #include "eeprom.h"

-#define EEPROM_SIZE 32
-
-static uint8_t buffer[EEPROM_SIZE];
+static uint8_t buffer[TOTAL_EEPROM_BYTE_COUNT];

 uint8_t eeprom_read_byte(const uint8_t *addr) {
    uintptr_t offset = (uintptr_t)addr;
--- a/platforms/test/eeprom_stm32_tests.cpp
+++ b/platforms/test/eeprom_stm32_tests.cpp
@ -17,8 +17,6 @@
 #include "gtest/gtest.h"

 extern "C" {
-#include "flash_stm32.h"
-#include "eeprom_stm32.h"
 #include "eeprom.h"
 }

@ -46,7 +44,6 @@ extern "C" {
 *
 */

-#define EEPROM_SIZE (FEE_PAGE_SIZE * FEE_PAGE_COUNT / 2)
 #define LOG_SIZE EEPROM_SIZE
 #define LOG_BASE (MOCK_FLASH_SIZE - LOG_SIZE)
 #define EEPROM_BASE (LOG_BASE - EEPROM_SIZE)
--- a/platforms/test/eeprom_stm32_tests.h
+++ b/platforms/test/eeprom_stm32_tests.h
@ -0,0 +1,8 @@
+// Copyright 2018-2022 Nick Brassel (@tzarc)
+// SPDX-License-Identifier: GPL-2.0-or-later
+#pragma once
+
+#include "flash_stm32.h"
+#include "eeprom_stm32.h"
+
+#define EEPROM_SIZE (FEE_PAGE_SIZE * FEE_PAGE_COUNT / 2)
--- a/platforms/test/rules.mk
+++ b/platforms/test/rules.mk
@ -1,4 +1,4 @@
-eeprom_stm32_DEFS  := -DFLASH_STM32_MOCKED -DNO_PRINT -DFEE_FLASH_BASE=FlashBuf
+eeprom_stm32_DEFS  := -DEEPROM_TEST_HARNESS -DFLASH_STM32_MOCKED -DNO_PRINT -DFEE_FLASH_BASE=FlashBuf
 eeprom_stm32_tiny_DEFS := $(eeprom_stm32_DEFS) \
 	-DFEE_MCU_FLASH_SIZE=1 \
 	-DMOCK_FLASH_SIZE=1024 \
--- a/quantum/dynamic_keymap.c
+++ b/quantum/dynamic_keymap.c
@ -29,24 +29,22 @@
 #    define DYNAMIC_KEYMAP_MACRO_COUNT 16
 #endif

-// This is the default EEPROM max address to use for dynamic keymaps.
-// The default is the ATmega32u4 EEPROM max address.
-// Explicitly override it if the keyboard uses a microcontroller with
-// more EEPROM *and* it makes sense to increase it.
-#ifndef DYNAMIC_KEYMAP_EEPROM_MAX_ADDR
-#    if defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__)
-#        define DYNAMIC_KEYMAP_EEPROM_MAX_ADDR 2047
-#    elif defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
-#        define DYNAMIC_KEYMAP_EEPROM_MAX_ADDR 4095
-#    elif defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega16U4__) || defined(__AVR_AT90USB162__) || defined(__AVR_ATtiny85__)
-#        define DYNAMIC_KEYMAP_EEPROM_MAX_ADDR 511
-#    else
-#        define DYNAMIC_KEYMAP_EEPROM_MAX_ADDR 1023
+#ifndef TOTAL_EEPROM_BYTE_COUNT
+#    error Unknown total EEPROM size. Cannot derive maximum for dynamic keymaps.
 #endif
+
+#ifndef DYNAMIC_KEYMAP_EEPROM_MAX_ADDR
+#    define DYNAMIC_KEYMAP_EEPROM_MAX_ADDR (TOTAL_EEPROM_BYTE_COUNT - 1)
+#endif
+
+#if DYNAMIC_KEYMAP_EEPROM_MAX_ADDR > (TOTAL_EEPROM_BYTE_COUNT - 1)
+#    pragma message STR(DYNAMIC_KEYMAP_EEPROM_MAX_ADDR) " > " STR((TOTAL_EEPROM_BYTE_COUNT - 1))
+#    error DYNAMIC_KEYMAP_EEPROM_MAX_ADDR is configured to use more space than what is available for the selected EEPROM driver
 #endif

 // Due to usage of uint16_t check for max 65535
 #if DYNAMIC_KEYMAP_EEPROM_MAX_ADDR > 65535
+#    pragma message STR(DYNAMIC_KEYMAP_EEPROM_MAX_ADDR) " > 65535"
 #    error DYNAMIC_KEYMAP_EEPROM_MAX_ADDR must be less than 65536
 #endif

@ -71,6 +69,7 @@
 // or DYNAMIC_KEYMAP_EEPROM_MAX_ADDR to increase it, *only if* the microcontroller has
 // more than the default.
 #if DYNAMIC_KEYMAP_EEPROM_MAX_ADDR - DYNAMIC_KEYMAP_MACRO_EEPROM_ADDR < 100
+#    pragma message STR(DYNAMIC_KEYMAP_EEPROM_MAX_ADDR - DYNAMIC_KEYMAP_MACRO_EEPROM_ADDR) " < 100"
 #    error Dynamic keymaps are configured to use more EEPROM than is available.
 #endif