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Copy pathsettingsflash.c
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80 lines (67 loc) · 2.25 KB
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#include "services/jd_services.h"
#include "services/interfaces/jd_flash.h"
#include "jd_client.h"
#include "devicescript.h"
#ifndef JD_FLASH_IN_SETTINGS
#define JD_FLASH_IN_SETTINGS 0
#endif
#if JD_FLASH_IN_SETTINGS
static devsmgr_cfg_t cfg;
static bool is_erased;
static uint8_t *max_write;
#define KEY "devs_prog"
void flash_program(void *dst, const void *src, uint32_t len) {
JD_ASSERT(cfg.program_base != NULL);
ptrdiff_t diff = (uint8_t *)dst - (uint8_t *)cfg.program_base;
JD_ASSERT(((uintptr_t)src & 3) == 0);
JD_ASSERT(0 <= diff && diff + len <= cfg.max_program_size);
JD_ASSERT((diff & 7) == 0);
for (unsigned i = 0; i < len; ++i)
JD_ASSERT(((uint8_t *)dst)[i] == 0xff);
memcpy(dst, src, len);
uint8_t *endp = (uint8_t *)dst + len;
if (!max_write || endp > max_write)
max_write = endp;
}
void flash_erase(void *page_addr) {
JD_ASSERT(cfg.program_base != NULL);
ptrdiff_t diff = (uint8_t *)page_addr - (uint8_t *)cfg.program_base;
JD_ASSERT(0 <= diff && diff <= cfg.max_program_size - JD_FLASH_PAGE_SIZE);
JD_ASSERT((diff & (JD_FLASH_PAGE_SIZE - 1)) == 0);
memset(page_addr, 0xff, JD_FLASH_PAGE_SIZE);
if (!is_erased) {
is_erased = 1;
max_write = cfg.program_base;
DMESG("removing flash entry");
jd_settings_set_bin(KEY, NULL, 0);
}
}
void devsmgr_init_mem(unsigned size) {
cfg.max_program_size = size;
cfg.program_base = jd_alloc(cfg.max_program_size);
devsmgr_init(&cfg);
jd_settings_get_bin(KEY, cfg.program_base, cfg.max_program_size);
}
void flash_sync(void) {
unsigned sz = max_write - (uint8_t *)cfg.program_base;
DMESG("writing %d bytes to flash", sz);
jd_settings_set_bin(KEY, cfg.program_base, sz);
is_erased = 0;
}
#endif
__attribute__((weak)) char *jd_settings_get(const char *key) {
uint8_t tmp[32];
int size = jd_settings_get_bin(key, tmp, sizeof(tmp));
if (size < 0)
return NULL;
char *r = jd_alloc(size + 1);
if (size <= (int)sizeof(tmp)) {
memcpy(r, tmp, size);
} else {
jd_settings_get_bin(key, r, size);
}
return r;
}
__attribute__((weak)) int jd_settings_set(const char *key, const char *val) {
return jd_settings_set_bin(key, val, val ? strlen(val) : 0);
}