/* write a word to wishbone */
int dbg_wb_write32(unsigned long adr, unsigned long data) {
int err;
pthread_mutex_lock(&dbg_access_mutex);
if(DEBUG_HARDWARE == DBG_HW_ADVANCED)
{
if ((err = adbg_select_module(DC_WISHBONE)))
{
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
err = adbg_wb_burst_write((void *)&data, 4, 1, adr);
}
else if(DEBUG_HARDWARE == DBG_HW_LEGACY)
{
data = ntohl(data);
if (APP_ERR_NONE == (err = legacy_dbg_set_chain(DC_WISHBONE)))
if (APP_ERR_NONE == (err = legacy_dbg_command(0x2, adr, 4)))
err = legacy_dbg_go((unsigned char*)&data, 4, 0);
}
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
// write a debug unit cpu module register
int dbg_cpu1_write_ctrl(unsigned long adr, unsigned char data) {
int err;
uint32_t dataword = data;
pthread_mutex_lock(&dbg_access_mutex);
if(DEBUG_HARDWARE == DBG_HW_ADVANCED)
{
if ((err = adbg_select_module(DC_CPU1))) {
printf("Failed to set chain to 0x%X\n", DC_CPU1);
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
if((err = adbg_ctrl_write(DBG_CPU1_REG_STATUS, &dataword, 2))) {
printf("Failed to write chain to 0x%X control reg 0x%X\n", DC_CPU1,DBG_CPU0_REG_STATUS ); // Only 2 bits: Reset, Stall
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
}
else if(DEBUG_HARDWARE == DBG_HW_LEGACY)
{
if (APP_ERR_NONE == (err = legacy_dbg_set_chain(DC_CPU1)))
err = legacy_dbg_ctrl(data & 2, data & 1);
}
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
// read a debug unit cpu module register
int dbg_cpu1_read_ctrl(unsigned long adr, unsigned char *data) {
int err;
uint32_t dataword;
pthread_mutex_lock(&dbg_access_mutex);
// reset is bit 1, stall is bit 0 in *data
if(DEBUG_HARDWARE == DBG_HW_ADVANCED)
{
if ((err = adbg_select_module(DC_CPU1))) {
printf("Failed to set chain to 0x%X\n", DC_CPU1);
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
if ((err = adbg_ctrl_read(DBG_CPU1_REG_STATUS, &dataword, 2))) {
printf("Failed to read chain 0x%X control reg 0x%X\n", DC_CPU0, DBG_CPU1_REG_STATUS);
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
*data = dataword;
}
else if(DEBUG_HARDWARE == DBG_HW_LEGACY)
{
int r, s;
if (APP_ERR_NONE == (err = legacy_dbg_set_chain(DC_CPU1)))
err = legacy_dbg_ctrl_read(&r, &s);
*data = (r << 1) | s;
}
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
// write a block to wishbone
int dbg_wb_write_block8(unsigned long adr, uint8_t *data, int len) {
int err;
pthread_mutex_lock(&dbg_access_mutex);
if(!len)
return APP_ERR_NONE; // GDB may issue a 0-length transaction to test if a feature is supported
if(DEBUG_HARDWARE == DBG_HW_ADVANCED)
{
if ((err = adbg_select_module(DC_WISHBONE)))
{
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
err = adbg_wb_burst_write((void *)data, 1, len, adr); // 'len' is in words...
}
else if(DEBUG_HARDWARE == DBG_HW_LEGACY)
{
if (APP_ERR_NONE == (err = legacy_dbg_set_chain(DC_WISHBONE)))
if (APP_ERR_NONE == (err = legacy_dbg_command(0x0, adr, len)))
err = legacy_dbg_go((unsigned char*)data, len, 0);
}
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
// CPU1 Functions. Note that 2 CPUs are not currently supported by GDB, so these are never actually
// called from the GDB interface. They are included for completeness and future use.
// read a register from cpu1
int dbg_cpu1_read(unsigned long adr, unsigned long *data)
{
int err;
pthread_mutex_lock(&dbg_access_mutex);
if(DEBUG_HARDWARE == DBG_HW_ADVANCED)
{
if ((err = adbg_select_module(DC_CPU1)))
{
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
err = adbg_wb_burst_read(4, 1, adr, (void *) data); // All CPU register reads / writes are bursts
}
else if(DEBUG_HARDWARE == DBG_HW_LEGACY)
{
if (APP_ERR_NONE == (err = legacy_dbg_set_chain(DC_CPU1)))
if (APP_ERR_NONE == (err = legacy_dbg_command(0x6, adr, 4)))
err = legacy_dbg_go((unsigned char*)data, 4, 1);
*data = ntohl(*data);
}
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
// write a block to wishbone
// Never actually called from the GDB interface
int dbg_wb_write_block16(unsigned long adr, uint16_t *data, int len) {
int err;
pthread_mutex_lock(&dbg_access_mutex);
if(!len)
return APP_ERR_NONE; // GDB may issue a 0-length transaction to test if a feature is supported
if(DEBUG_HARDWARE == DBG_HW_ADVANCED)
{
if ((err = adbg_select_module(DC_WISHBONE)))
{
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
err = adbg_wb_burst_write((void *)data, 2, len, adr); // 'len' is (half)words
}
else if(DEBUG_HARDWARE == DBG_HW_LEGACY)
{
int i;
int bytelen = len<<1;
for (i = 0; i < len; i ++) data[i] = ntohs(data[i]);
if (APP_ERR_NONE == (err = legacy_dbg_set_chain(DC_WISHBONE)))
if (APP_ERR_NONE == (err = legacy_dbg_command(0x1, adr, bytelen)))
err = legacy_dbg_go((unsigned char*)data, bytelen, 0); // 'len' is 16-bit halfwords, call wants bytes
}
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
int dbg_wb_read_block32(unsigned long adr, unsigned long *data, int len) {
int err;
pthread_mutex_lock(&dbg_access_mutex);
if(!len)
return APP_ERR_NONE; // GDB may issue a 0-length transaction to test if a feature is supported
if(DEBUG_HARDWARE == DBG_HW_ADVANCED)
{
if ((err = adbg_select_module(DC_WISHBONE)))
{
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
err = adbg_wb_burst_read(4, len, adr, (void *)data); // 'len' is words.
}
else if(DEBUG_HARDWARE == DBG_HW_LEGACY)
{
int i;
int bytelen = len<<2;
if (APP_ERR_NONE == (err = legacy_dbg_set_chain(DC_WISHBONE)))
if (APP_ERR_NONE == (err = legacy_dbg_command(0x6, adr, bytelen)))
if (APP_ERR_NONE == (err = legacy_dbg_go((unsigned char*)data, bytelen, 1))) // 'len' is words, call wants bytes
for (i = 0; i < len; i ++) data[i] = ntohl(data[i]);
}
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
/* write a debug unit cpu module register
* Since OR32 debug module has only 1 register,
* adr is ignored (for now) */
int dbg_cpu0_write_ctrl(uint32_t adr, uint8_t data) {
int err = APP_ERR_NONE;
uint32_t dataword = data;
pthread_mutex_lock(&dbg_access_mutex);
if(DEBUG_HARDWARE == DBG_HW_ADVANCED)
{
if ((err = adbg_select_module(DC_CPU0))) {
printf("Failed to set chain to 0x%X\n", DC_CPU0);
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
if((err = adbg_ctrl_write(DBG_CPU0_REG_STATUS, &dataword, 1))) { //rih: changed '2' to '1'. TODO: Should be 1 bit per NB_CORES
printf("Failed to write chain to 0x%X control reg 0x%X\n", DC_CPU0,DBG_CPU0_REG_STATUS ); // Only 2 bits: Reset, Stall
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
}
else if(DEBUG_HARDWARE == DBG_HW_LEGACY)
{
if (APP_ERR_NONE == (err = legacy_dbg_set_chain(DC_CPU0)))
err = legacy_dbg_ctrl(data & 2, data &1);
}
debug("cpu0_write_ctrl(): set reg to 0x%X\n", data);
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
/* write a cpu register to cpu0. This is assumed to be an OR32 CPU, with 32-bit regs. */
int dbg_cpu0_write(uint32_t adr, uint32_t data) {
int err;
pthread_mutex_lock(&dbg_access_mutex);
if(DEBUG_HARDWARE == DBG_HW_ADVANCED)
{
if ((err = adbg_select_module(DC_CPU0)))
{
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
err = adbg_wb_burst_write((void *)&data, 4, 1, adr);
}
else if(DEBUG_HARDWARE == DBG_HW_LEGACY)
{
data = ntohl(data);
if (APP_ERR_NONE == (err = legacy_dbg_set_chain(DC_CPU0)))
if (APP_ERR_NONE == (err = legacy_dbg_command(0x2, adr, 4)))
err = legacy_dbg_go((unsigned char*)&data, 4, 0);
}
debug("cpu0_write, adr 0x%X, data 0x%X, ret %i\n", adr, data, err);
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
// Never actually called from the GDB interface
int dbg_wb_read_block8(uint32_t adr, uint8_t *data, int len) {
int err;
if(!len)
return APP_ERR_NONE; // GDB may issue a 0-length transaction to test if a feature is supported
pthread_mutex_lock(&dbg_access_mutex);
if(DEBUG_HARDWARE == DBG_HW_ADVANCED)
{
if ((err = adbg_select_module(DC_WISHBONE)))
{
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
err = adbg_wb_burst_read(1, len, adr, (void *)data); // *** is 'len' bits or words?? Call wants words...
}
else if(DEBUG_HARDWARE == DBG_HW_LEGACY)
{
if (APP_ERR_NONE == (err = legacy_dbg_set_chain(DC_WISHBONE)))
if (APP_ERR_NONE == (err = legacy_dbg_command(0x4, adr, len)))
err = legacy_dbg_go((unsigned char*)data, len, 1);
}
cable_flush();
pthread_mutex_unlock(&dbg_access_mutex);
return err;
}
