static size_t memwrite_flash(void *dest, void *src, size_t len) {
#if USE_BLOCKWRITING
return rom_pwrite(src, len, (off_t)(uintptr_t)dest);
// The compiler will remove everything from this point on.
// -> No #elsif needed
#endif /* USE_BLOCKWRITING */
size_t written = 0;
unsigned short *lcldest = dest;
char *lclsrc = src;
unsigned short ow;
char *owptr = (char*) (&ow);
#if DEBUG
if ((uintptr_t) dest & 1) {
puts("Alignment FAIL");
}
#endif
//DPRINTF("Flash: %x\n", ow);
//watchdog_periodic();
#if 1 != FBENCHMARK
flash_setup();
#endif
while ((len & ~0x1) > written) {
owptr[0] = *lclsrc++;
owptr[1] = *lclsrc++;
#if 1 !=FBENCHMARK
flash_write(lcldest, ow);
#if DEBUG
printf("WRT: %p, %d, %d\n", lcldest, ow, *lcldest);
watchdog_periodic();
if (ow != *lcldest) {
printf("PANIC!");
while (1)
;
}
#endif
lcldest++;
#endif
written += 2;
}
#if 1 != FBENCHMARK
flash_done();
IFG1 |= UTXIFG0;
#endif
return written;
}
/*---------------------------------------------------------------------------*/
int
elfloader_load(off_t eepromaddr)
{
struct cle_info h;
int ret;
void (*elfloader_init)(void);
elfloader_unknown[0] = 0;
/* The ELF header is located at the start of the buffer. */
ret = cle_read_info(&h, xmem_pread, eepromaddr);
if(ret != ELFLOADER_OK) {
memcpy(elfloader_unknown, h.name, sizeof(elfloader_unknown));
elfloader_unknown[sizeof(elfloader_unknown) - 1] = 0;
return ret;
}
if(datamemory != NULL) {
free(datamemory);
}
/* We are making semi-permanent allocations, first compact heap! */
/* malloc_compact(); */
datamemory = malloc(IMAX(h.textsize, h.datasize + h.bsssize));
if(datamemory == NULL) {
return ELFLOADER_DATA_TO_LARGE; /* XXX or text to large */
}
h.data = datamemory;
h.bss = datamemory + h.datasize;
h.text = TEXTMEMORY;
PRINTF("elfloader: copy text segment to RAM %p %p\n",
h.data, h.data + h.textsize);
ret = xmem_pread(datamemory, h.textsize, eepromaddr + h.textoff);
assert(ret > 0);
if(h.textrelasize > 0) {
PRINTF("elfloader: relocate text in RAM\n");
ret = cle_relocate(&h,
xmem_pread,
eepromaddr,
datamemory,
h.textrelaoff, h.textrelasize);
if(ret != ELFLOADER_OK) {
memcpy(elfloader_unknown, h.name, sizeof(elfloader_unknown));
elfloader_unknown[sizeof(elfloader_unknown) - 1] = 0;
return ret;
}
}
PRINTF("elfloader: copy text segment to ROM 0x%lx 0x%lx\n",
(unsigned long)h.text,
(unsigned long)h.text + h.textsize);
ret = rom_erase((h.textsize+ROM_ERASE_UNIT_SIZE) & ~(ROM_ERASE_UNIT_SIZE-1),
h.text);
assert(ret > 0);
ret = rom_pwrite(datamemory, h.textsize, h.text);
assert(ret > 0);
PRINTF("elfloader: copy data segment to RAM %p %p\n",
h.data, h.data + h.datasize);
ret = xmem_pread(datamemory, h.datasize, eepromaddr + h.dataoff);
assert(ret >= h.datasize);
if(h.datarelasize > 0) {
PRINTF("elfloader: relocate data segment\n");
ret = cle_relocate(&h,
xmem_pread,
eepromaddr,
datamemory,
h.datarelaoff, h.datarelasize);
if(ret != ELFLOADER_OK) {
memcpy(elfloader_unknown, h.name, sizeof(elfloader_unknown));
elfloader_unknown[sizeof(elfloader_unknown) - 1] = 0;
return ret;
}
}
PRINTF("elfloader: zero bss %p %p\n", h.bss, h.bss + h.bsssize);
memset(h.bss, 0, h.bsssize);
/* Find _init, _fini, and loaded_process. */
elfloader_loaded_process = cle_lookup(&h, xmem_pread, eepromaddr,
"autostart_processes");
elfloader_fini = cle_lookup(&h, xmem_pread, eepromaddr, "_fini");
elfloader_init = cle_lookup(&h, xmem_pread, eepromaddr, "_init");
if(elfloader_init != NULL) {
PRINTF("init=%p fini=%p\n", elfloader_init, elfloader_fini);
(*elfloader_init)();
elfloader_loaded_process = NULL;
return ELFLOADER_OK;
}
if(elfloader_loaded_process != NULL) {
PRINTF("elfloader: launch program\n");
process_start(elfloader_loaded_process, NULL);
elfloader_fini = NULL;
return ELFLOADER_OK;
} else {
return ELFLOADER_NO_STARTPOINT;
}
}
