mirror of https://github.com/m-labs/artiq.git
112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
#include <string.h>
|
|
#include <generated/csr.h>
|
|
|
|
#include "log.h"
|
|
#include "mailbox.h"
|
|
#include "elf_loader.h"
|
|
#include "services.h"
|
|
#include "kloader.h"
|
|
|
|
|
|
static struct symbol symtab[128];
|
|
static int _symtab_count;
|
|
static char _symtab_strings[128*16];
|
|
static char *_symtab_strptr;
|
|
|
|
static void symtab_init(void)
|
|
{
|
|
memset(symtab, 0, sizeof(symtab));
|
|
_symtab_count = 0;
|
|
_symtab_strptr = _symtab_strings;
|
|
}
|
|
|
|
static int symtab_add(const char *name, void *target)
|
|
{
|
|
if(_symtab_count >= sizeof(symtab)/sizeof(symtab[0])) {
|
|
log("Too many provided symbols in object");
|
|
symtab_init();
|
|
return 0;
|
|
}
|
|
symtab[_symtab_count].name = _symtab_strptr;
|
|
symtab[_symtab_count].target = target;
|
|
_symtab_count++;
|
|
|
|
while(1) {
|
|
if(_symtab_strptr >= &_symtab_strings[sizeof(_symtab_strings)]) {
|
|
log("Provided symbol string table overflow");
|
|
symtab_init();
|
|
return 0;
|
|
}
|
|
*_symtab_strptr = *name;
|
|
_symtab_strptr++;
|
|
if(*name == 0)
|
|
break;
|
|
name++;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int kloader_load(void *buffer, int length)
|
|
{
|
|
#ifdef ARTIQ_AMP
|
|
if(!kernel_cpu_reset_read()) {
|
|
log("BUG: attempted to load while kernel CPU running");
|
|
return 0;
|
|
}
|
|
#endif
|
|
symtab_init();
|
|
return load_elf(
|
|
resolve_service_symbol, symtab_add,
|
|
buffer, length, (void *)KERNELCPU_PAYLOAD_ADDRESS, 4*1024*1024);
|
|
}
|
|
|
|
kernel_function kloader_find(const char *name)
|
|
{
|
|
return find_symbol(symtab, name);
|
|
}
|
|
|
|
#ifdef ARTIQ_AMP
|
|
|
|
extern char _binary_ksupport_bin_start;
|
|
extern char _binary_ksupport_bin_end;
|
|
|
|
static void start_kernel_cpu(void *addr)
|
|
{
|
|
memcpy((void *)KERNELCPU_EXEC_ADDRESS, &_binary_ksupport_bin_start,
|
|
&_binary_ksupport_bin_end - &_binary_ksupport_bin_start);
|
|
mailbox_acknowledge();
|
|
mailbox_send(addr);
|
|
kernel_cpu_reset_write(0);
|
|
}
|
|
|
|
void kloader_start_bridge(void)
|
|
{
|
|
start_kernel_cpu(NULL);
|
|
}
|
|
|
|
void kloader_start_user_kernel(kernel_function k)
|
|
{
|
|
if(!kernel_cpu_reset_read()) {
|
|
log("BUG: attempted to start kernel CPU while already running (user kernel)");
|
|
return;
|
|
}
|
|
start_kernel_cpu((void *)k);
|
|
}
|
|
|
|
void kloader_start_idle_kernel(void)
|
|
{
|
|
if(!kernel_cpu_reset_read()) {
|
|
log("BUG: attempted to start kernel CPU while already running (idle kernel)");
|
|
return;
|
|
}
|
|
/* TODO */
|
|
}
|
|
|
|
void kloader_stop_kernel(void)
|
|
{
|
|
kernel_cpu_reset_write(1);
|
|
}
|
|
|
|
#endif
|