//
// Execute a Linux kernel - this is a RedBoot CLI command
//
static void
do_exec(int argc, char *argv[])
{
unsigned long entry;
bool wait_time_set, cmd_line_set;
int wait_time;
char *cmd_line;
char *cline;
struct option_info opts[2];
hal_virtual_comm_table_t *__chan;
int baud_rate;
bd_t *board_info;
CYG_INTERRUPT_STATE oldints;
unsigned long sp = CYGMEM_REGION_ram+CYGMEM_REGION_ram_SIZE;
init_opts(&opts[0], 'w', true, OPTION_ARG_TYPE_NUM,
(void *)&wait_time, (bool *)&wait_time_set, "wait timeout");
init_opts(&opts[1], 'c', true, OPTION_ARG_TYPE_STR,
(void *)&cmd_line, (bool *)&cmd_line_set, "kernel command line");
entry = entry_address; // Default from last 'load' operation
if (!scan_opts(argc, argv, 1, opts, 2, (void *)&entry, OPTION_ARG_TYPE_NUM,
"[physical] starting address")) {
return;
}
if (entry == (unsigned long)NO_MEMORY) {
diag_printf("Can't execute Linux - invalid entry address\n");
return;
}
// Determine baud rate on current console
__chan = CYGACC_CALL_IF_CONSOLE_PROCS();
baud_rate = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_GETBAUD);
if (baud_rate <= 0) {
baud_rate = CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD;
}
// Make a little space at the top of the stack, and align to
// 64-bit boundary.
sp = (sp-128) & ~7; // The Linux boot code uses this space for FIFOs
// Copy the commandline onto the stack, and set the SP to just below it.
if (cmd_line_set) {
int len,i;
// get length of string
for( len = 0; cmd_line[len] != '\0'; len++ );
// decrement sp by length of string and align to
// word boundary.
sp = (sp-(len+1)) & ~3;
// assign this SP value to command line start
cline = (char *)sp;
// copy command line over.
for( i = 0; i < len; i++ )
cline[i] = cmd_line[i];
cline[len] = '\0';
} else {
cline = (char *)NULL;
}
// Set up parameter struct at top of stack
sp = sp-sizeof(bd_t);
board_info = (bd_t *)sp;
memset(board_info, sizeof(*board_info), 0);
board_info->bi_tag = 0x42444944;
board_info->bi_size = sizeof(*board_info);
board_info->bi_revision = 1;
board_info->bi_bdate = 0x06012002;
board_info->bi_memstart = CYGMEM_REGION_ram;
board_info->bi_memsize = CYGMEM_REGION_ram_SIZE;
board_info->bi_baudrate = baud_rate;
board_info->bi_cmdline = cline;
#ifdef CYGPKG_REDBOOT_NETWORKING
memcpy(board_info->bi_enetaddr, __local_enet_addr, sizeof(enet_addr_t));
#endif
// Call platform specific code to fill in the platform/architecture specific details
plf_redboot_linux_exec(board_info);
// adjust SP to 64 byte boundary, and leave a little space
// between it and the commandline for PowerPC calling
// conventions.
sp = (sp-64)&~63;
if (wait_time_set) {
int script_timeout_ms = wait_time * 1000;
#ifdef CYGFUN_REDBOOT_BOOT_SCRIPT
unsigned char *hold_script = script;
script = (unsigned char *)0;
#endif
diag_printf("About to start execution at %p - abort with ^C within %d seconds\n",
(void *)entry, wait_time);
while (script_timeout_ms >= CYGNUM_REDBOOT_CLI_IDLE_TIMEOUT) {
int res;
char line[80];
res = _rb_gets(line, sizeof(line), CYGNUM_REDBOOT_CLI_IDLE_TIMEOUT);
if (res == _GETS_CTRLC) {
#ifdef CYGFUN_REDBOOT_BOOT_SCRIPT
script = hold_script; // Re-enable script
#endif
return;
}
script_timeout_ms -= CYGNUM_REDBOOT_CLI_IDLE_TIMEOUT;
}
}
#ifdef CYGPKG_IO_ETH_DRIVERS
eth_drv_stop();
#endif
// Disable interrupts
HAL_DISABLE_INTERRUPTS(oldints);
// Put the caches to sleep.
HAL_DCACHE_SYNC();
HAL_ICACHE_DISABLE();
HAL_DCACHE_DISABLE();
HAL_DCACHE_SYNC();
HAL_ICACHE_INVALIDATE_ALL();
HAL_DCACHE_INVALIDATE_ALL();
// diag_printf("entry %08x, sp %08x, info %08x, cmd line %08x, baud %d\n",
// entry, sp, board_info, cline, baud_rate);
// breakpoint();
// Call into Linux
__asm__ volatile (
// Start by disabling MMU - the mappings are
// 1-1 so this should not cause any problems
"mfmsr 3\n"
"li 4,0xFFFFFFCF\n"
"and 3,3,4\n"
"sync\n"
"mtmsr 3\n"
"sync\n"
// Now set up parameters to jump into linux
"mtlr %0\n" // set entry address in LR
"mr 1,%1\n" // set stack pointer
"mr 3,%2\n" // set board info in R3
"mr 4,%3\n" // set command line in R4
"blr \n" // jump into linux
:
: "r"(entry),"r"(sp),"r"(board_info),"r"(cline)
: "r3", "r4"
);
}
int
xyzModem_stream_open (connection_info_t * info, int *err)
{
#ifdef REDBOOT
int console_chan;
#endif
int stat = 0;
int retries = xyzModem_MAX_RETRIES;
int crc_retries = xyzModem_MAX_RETRIES_WITH_CRC;
/* ZM_DEBUG(zm_out = zm_out_start); */
#ifdef xyzModem_zmodem
if (info->mode == xyzModem_zmodem)
{
*err = xyzModem_noZmodem;
return -1;
}
#endif
#ifdef REDBOOT
/* Set up the I/O channel. Note: this allows for using a different port in the future */
console_chan =
CYGACC_CALL_IF_SET_CONSOLE_COMM
(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
if (info->chan >= 0)
{
CYGACC_CALL_IF_SET_CONSOLE_COMM (info->chan);
}
else
{
CYGACC_CALL_IF_SET_CONSOLE_COMM (console_chan);
}
xyz.__chan = CYGACC_CALL_IF_CONSOLE_PROCS ();
CYGACC_CALL_IF_SET_CONSOLE_COMM (console_chan);
CYGACC_COMM_IF_CONTROL (*xyz.__chan, __COMMCTL_SET_TIMEOUT,
xyzModem_CHAR_TIMEOUT);
#else
/* TODO: CHECK ! */
int dummy = 0;
xyz.__chan = &dummy;
#endif
xyz.len = 0;
xyz.crc_mode = true;
xyz.at_eof = false;
xyz.tx_ack = false;
xyz.mode = info->mode;
xyz.total_retries = 0;
xyz.total_SOH = 0;
xyz.total_STX = 0;
xyz.total_CAN = 0;
#ifdef USE_YMODEM_LENGTH
xyz.read_length = 0;
xyz.file_length = 0;
#endif
CYGACC_COMM_IF_PUTC (*xyz.__chan, (xyz.crc_mode ? 'C' : NAK));
if (xyz.mode == xyzModem_xmodem)
{
/* X-modem doesn't have an information header - exit here */
xyz.next_blk = 1;
return 0;
}
while (retries-- > 0)
{
stat = xyzModem_get_hdr ();
if (stat == 0)
{
/* Y-modem file information header */
if (xyz.blk == 0)
{
#ifdef USE_YMODEM_LENGTH
/* skip filename */
while (*xyz.bufp++);
/* get the length */
parse_num ((char *) xyz.bufp, &xyz.file_length, NULL, " ");
#endif
/* The rest of the file name data block quietly discarded */
xyz.tx_ack = true;
}
xyz.next_blk = 1;
xyz.len = 0;
return 0;
}
else if (stat == xyzModem_timeout)
{
if (--crc_retries <= 0)
xyz.crc_mode = false;
CYGACC_CALL_IF_DELAY_US (5 * 100000); /* Extra delay for startup */
CYGACC_COMM_IF_PUTC (*xyz.__chan, (xyz.crc_mode ? 'C' : NAK));
xyz.total_retries++;
ZM_DEBUG (zm_dprintf ("NAK (%d)\n", __LINE__));
}
if (stat == xyzModem_cancel)
{
break;
}
}
*err = stat;
ZM_DEBUG (zm_flush ());
return -1;
}