fw/fe310/eos/soc/aon.c


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#include <stdlib.h>
#include <stdint.h>

#include "encoding.h"
#include "platform.h"

#include "eos.h"
#include "pwr.h"

#include "aon.h"

#define AON_MAX_BACKUP      16

int eos_aon_init(void) {
    uint8_t wakeup_cause;
    int i, rst;

    wakeup_cause = eos_pwr_wakeup_cause();
    rst = (wakeup_cause == EOS_PWR_WAKE_RST);
    if (rst) {
        for (i=0; i<AON_MAX_BACKUP; i++) {
            eos_aon_set_reg(i, 0);
        }
    }

    return EOS_OK;
}

uint32_t eos_aon_get_reg(int idx) {
    uint32_t addr;

    if ((idx < 0) || (idx >= AON_MAX_BACKUP)) return -1;

    addr = AON_BACKUP0 + sizeof(uint32_t) * idx;
    return AON_REG(addr);
}

void eos_aon_set_reg(int idx, uint32_t reg) {
    uint32_t addr;

    if ((idx < 0) || (idx > 15)) return;

    addr = AON_BACKUP0 + sizeof(uint32_t) * idx;
    AON_REG(addr) = reg;
}