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/*
* File: calculate.c
*
* Calculation of sector numbers and pages
*/
#include <stdint.h>
#include <stlink.h>
#include "calculate.h"
#include "common_flash.h"
#include "read_write.h"
uint32_t calculate_F4_sectornum(uint32_t flashaddr) {
uint32_t offset = 0;
flashaddr &= ~STM32_FLASH_BASE; // page now holding the actual flash address
if (flashaddr >= 0x100000) {
offset = 12;
flashaddr -= 0x100000;
}
if (flashaddr < 0x4000) {
return (offset + 0);
} else if (flashaddr < 0x8000) {
return (offset + 1);
} else if (flashaddr < 0xc000) {
return (offset + 2);
} else if (flashaddr < 0x10000) {
return (offset + 3);
} else if (flashaddr < 0x20000) {
return (offset + 4);
} else {
return (offset + (flashaddr / 0x20000) + 4);
}
}
uint32_t calculate_F7_sectornum(uint32_t flashaddr) {
flashaddr &= ~STM32_FLASH_BASE; // Page now holding the actual flash address
if (flashaddr < 0x20000) {
return (flashaddr / 0x8000);
} else if (flashaddr < 0x40000) {
return (4);
} else {
return ((flashaddr / 0x40000) + 4);
}
}
uint32_t calculate_H7_sectornum(stlink_t *sl, uint32_t flashaddr, uint32_t bank) {
// sector holding the flash address
flashaddr &= ~((bank == BANK_1) ? STM32_FLASH_BASE : STM32_H7_FLASH_BANK2_BASE);
return (flashaddr / sl->flash_pgsz);
}
// returns BKER:PNB for the given page address
uint32_t calculate_L4_page(stlink_t *sl, uint32_t flashaddr) {
uint32_t bker = 0;
uint32_t flashopt;
stlink_read_debug32(sl, FLASH_L4_OPTR, &flashopt);
flashaddr -= STM32_FLASH_BASE;
if (sl->chip_id == STM32_CHIPID_L4 ||
sl->chip_id == STM32_CHIPID_L496x_L4A6x ||
sl->chip_id == STM32_CHIPID_L4Rx) {
// these chips use dual bank flash
if (flashopt & (uint32_t)(1lu << FLASH_L4_OPTR_DUALBANK)) {
uint32_t banksize = sl->flash_size / 2;
if (flashaddr >= banksize) {
flashaddr -= banksize;
bker = 0x100;
}
}
}
// For 1MB chips without the dual-bank option set, the page address will
// overflow into the BKER bit, which gives us the correct bank:page value.
return (bker | flashaddr / sl->flash_pgsz);
}
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