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[SC64][SW] Implement correct behavior for FlashRAM writes

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This commit is contained in:
Mateusz Faderewski 2024-01-10 22:38:04 +01:00
parent 2639a93b6f
commit 13fc38fe73
1 changed files with 10 additions and 4 deletions
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14
sw/controller/src/flashram.c
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@ -43,7 +43,8 @@ void flashram_init (void) {
void flashram_process (void) {
uint32_t scr = fpga_reg_get(REG_FLASHRAM_SCR);
enum operation op = flashram_operation_type(scr);
uint8_t buffer[FLASHRAM_PAGE_SIZE];
uint8_t read_buffer[FLASHRAM_PAGE_SIZE];
uint8_t write_buffer[FLASHRAM_PAGE_SIZE];
uint32_t address = FLASHRAM_ADDRESS;
uint32_t erase_size = (op == OP_ERASE_SECTOR) ? FLASHRAM_SECTOR_SIZE : FLASHRAM_SIZE;
uint32_t page = (op != OP_ERASE_ALL) ? ((scr & FLASHRAM_SCR_PAGE_MASK) >> FLASHRAM_SCR_PAGE_BIT) : 0;
@ -53,16 +54,21 @@ void flashram_process (void) {
case OP_ERASE_ALL:
case OP_ERASE_SECTOR:
for (int i = 0; i < FLASHRAM_PAGE_SIZE; i++) {
buffer[i] = 0xFF;
write_buffer[i] = 0xFF;
}
for (int i = 0; i < erase_size; i += FLASHRAM_PAGE_SIZE) {
fpga_mem_write(address + i, FLASHRAM_PAGE_SIZE, buffer);
fpga_mem_write(address + i, FLASHRAM_PAGE_SIZE, write_buffer);
}
fpga_reg_set(REG_FLASHRAM_SCR, FLASHRAM_SCR_DONE);
break;
case OP_WRITE_PAGE:
fpga_mem_copy(FLASHRAM_BUFFER_ADDRESS, address, FLASHRAM_PAGE_SIZE);
fpga_mem_read(FLASHRAM_BUFFER_ADDRESS, FLASHRAM_PAGE_SIZE, read_buffer);
fpga_mem_read(address, FLASHRAM_PAGE_SIZE, write_buffer);
for (int i = 0; i < FLASHRAM_PAGE_SIZE; i++) {
write_buffer[i] &= read_buffer[i];
}
fpga_mem_write(address, FLASHRAM_PAGE_SIZE, write_buffer);
fpga_reg_set(REG_FLASHRAM_SCR, FLASHRAM_SCR_DONE);
break;