debugging, made generated lowlevel.c produce working image

ezynq_clk.py

@@ -893,7 +893,7 @@ class EzynqClk:
 
 # reg  uart_clk_ctrl, offs=0x154 dflt:0x3f03 actual: 0xa02
         if 'UART' in self.iface_divs:
-            print self.iface_divs['UART']
+#            print self.iface_divs['UART']
             if self.iface_divs['UART']['PLL']=='ARM':     
                 uart_srcsel= 2
             elif self.iface_divs['UART']['PLL']=='DDR':     

ezynq_ddr.py

@@ -28,6 +28,7 @@ import ezynq_registers
 import ezynq_ddrcfg_defs
 import ezynq_feature_config
 import ezynq_ddriob_def
+import ezynq_slcr_clk_def
 def set_random_bits(old,d,bits):
     data = 0
     mask = 0
@@ -45,6 +46,13 @@ class EzynqDDR:
         self.ddrc_register_set=  ezynq_registers.EzynqRegisters(self.DDRC_DEFS,0,regs_masked,permit_undefined_bits)
         self.ddriob_register_set=ezynq_registers.EzynqRegisters(self.DDRIOB_DEFS,0,regs_masked,permit_undefined_bits)
     
+    def generate_command_queue_empty(self):
+        # generate code to be included in u-boot for testing DDR command queue
+        reg_set=  ezynq_registers.EzynqRegisters(ezynq_slcr_clk_def.SLCR_CLK_DEFS,0,[])
+        reg_set.wait_reg_field_values('ddr_cmd_sta',  # DDR Command queue state
+                                               (('cmd_q_empty',    0)), True) # 0 - no commands for DDRC are queued, 1 - commands pending
+        return reg_set.get_register_sets(sort_addr=True,apply_new=True)
+    
         
     def parse_parameters(self,raw_configs):
         self.features.parse_features(raw_configs)

ezynq_slcr_clk_def.py

@@ -699,11 +699,11 @@ SLCR_CLK_DEFS={ #not all fields are defined currently
                                    'FIELDS':{
                   'reserved':                 {'r':( 1,31),'d':0, 'c':'reserved'},
                   'start_ref':                {'r':( 0, 0),'d':0, 'c':'1 - Start Refresh (self-clearing). Only needed if auto refresh is disabled in reg_ddrc_dis_auto_refresh'}}},
-      'ddr_cmd_sta':              {'OFFS': 0x618,'DFLT':0,'RO':'RW',
+      'ddr_cmd_sta':              {'OFFS': 0x618,'DFLT':0,'RW':'RO',
                                    'COMMENTS':'DDR Command queue state',
                                    'FIELDS':{
                   'reserved':                 {'r':( 1,31),'d':0, 'c':'reserved'},
-                  'vmd_q_empty':              {'r':( 0, 0),'d':0, 'm':'R', 'c':'0 - no commands fro DDRC are queued, 1 - commands pending'}}},
+                  'cmd_q_empty':              {'r':( 0, 0),'d':0, 'm':'R', 'c':'0 - no commands for DDRC are queued, 1 - commands pending'}}},
       'ddr_urgent_sel':           {'OFFS': 0x61c,'DFLT':0,'RW':'RW',
                                    'COMMENTS':'DDR Urgent select',
                                    'FIELDS':{

ezynq_uboot.py

@@ -330,14 +330,15 @@ void dump_ddrc_regs(void)
     def make_slcr_register_dump(self):
         self.sections.append('slcr_dump')
         self.cfile+='''/* Dump all SLCR */        
-void dump_slxr_regs(void)
+void dump_slcr_regs(void)
 {
 \tuart_dump_regs(0xf8000000, 0xf8000b74, 16);
 \tuart_puts("\\r\\n");
+}
 
 '''
         
-    def dci_calibration (self, reg_sets,ddr): #ddr is an instance of ezynq_ddr.EzynqDDR
+    def dci_calibration (self, reg_sets):
         if len(reg_sets)==0:
             print 'No DCI calibration register data is provided, skipping generating dci_calibration()'
             return
@@ -346,11 +347,12 @@ inline void dci_calibration(void)
 {
 \t/* Toggle active-low DCI reset, initialize DCI calibration, wait for DONE */
 '''
+        self._add_reg_writes(reg_sets)
         self.cfile+='}\n\n'
         self.sections.append('dci_calibration')
 
 
-    def ddr_start (self, reg_sets,ddr): #ddr is an instance of ezynq_ddr.EzynqDDR
+    def ddr_start (self, reg_sets):
         if len(reg_sets)==0:
             print 'No DDR start data is provided, skipping generating ddr_start()'
             return
@@ -362,6 +364,17 @@ inline void ddr_start(void)
         self.cfile+='}\n\n'
         self.sections.append('ddr_start')
 
+    def ddrc_wait_empty_queue (self,reg_sets):
+        if len(reg_sets)==0:
+            print 'No DDR start data is provided, skipping generating ddrc_status()'
+            return
+        self.cfile+='''/* Verify there are no commands in DDRC queue pending */        
+inline void ddrc_wait_queue_empty(void)
+{
+'''
+        self._add_reg_writes(reg_sets)
+        self.cfile+='}\n\n'
+        self.sections.append('ddrc_status')
 
     def _cp_led(self,name):
         led_cp=self.features.get_par_value_or_none(name)
@@ -407,10 +420,10 @@ void lowlevel_init(void)
         self._cp_led('LED_CHECKPOINT_5') # After UART is programmed
         
         if self.features.get_par_value_or_none('DUMP_SLCR_EARLY'):
-            self.cfile+='\tuart_puts("SLCR registers before DCI/DDR initialization\\r\\n")\n'
+            self.cfile+='\tuart_puts("SLCR registers before DCI/DDR initialization\\r\\n");\n'
             self.cfile+='\tdump_slcr_regs(); /*Dump all SLCR registers before DCI/DDR initialization */\n'
         if self.features.get_par_value_or_none('DUMP_DDRC_EARLY'):
-            self.cfile+='\tuart_puts("DDRC registers before DCI/DDR initialization\\r\\n")\n'
+            self.cfile+='\tuart_puts("DDRC registers before DCI/DDR initialization\\r\\n");\n'
             self.cfile+='\tdump_ddrc_regs(); /*Dump all DDRC registers before DCI/DDR initialization */\n'
         self.cfile+='''/*
    Calibrate DDR DCI impedance and wait for completion
@@ -427,10 +440,10 @@ void lowlevel_init(void)
 '''
         self._cp_led('LED_CHECKPOINT_7') # After DDR is initialized
         if self.features.get_par_value_or_none('DUMP_SLCR_LATE'):
-            self.cfile+='\tuart_puts("SLCR registers after DCI/DDR initialization\\r\\n")\n'
+            self.cfile+='\tuart_puts("SLCR registers after DCI/DDR initialization\\r\\n");\n'
             self.cfile+='\tdump_slcr_regs(); /*Dump all SLCR registers after DCI/DDR initialization */\n'
         if self.features.get_par_value_or_none('DUMP_DDRC_LATE'):
-            self.cfile+='\tuart_puts("DDRC registers after DCI/DDR initialization\\r\\n")\n'
+            self.cfile+='\tuart_puts("DDRC registers after DCI/DDR initialization\\r\\n");\n'
             self.cfile+='\tdump_ddrc_regs(); /*Dump all DDRC registers after DCI/DDR initialization */\n'
         self.cfile+='''/*
    Copy 3 pages of OCM from 0x00000.0x2ffff to DDR 0x4000000.0x402ffff
@@ -440,9 +453,8 @@ void lowlevel_init(void)
 \twhile (s< ((int *)0x30000)) *d++=*s++;
 
 '''
-# CONFIG_EZYNQ_LED_CHECKPOINT_10 = OFF # Before relocation down to address 0
-# CONFIG_EZYNQ_LED_CHECKPOINT_11 = ON  # After relocation down to address 0
-# CONFIG_EZYNQ_LED_CHECKPOINT_12 = OFF # Before leaving lowlevel_init()
+        self.cfile+='\tddrc_wait_queue_empty(); /* Wait no commands are pending in DDRC queue */\n'            
+
         self._cp_led('LED_CHECKPOINT_8') # Before relocation to DDR (to 0x4000000+ )
         self.cfile+='''/*
    Now jump to the same instruction in the DDR copy of the currently executed code in OCM
@@ -452,6 +464,8 @@ void lowlevel_init(void)
 \tasm("add pc, pc, #0x4000000" );
 
 '''
+# seems some delay is needed before remapping DDR memory
+        self.cfile+='\tddrc_wait_queue_empty(); /* seems some delay is needed here before remapping DDR memory */\n'            
         self._cp_led('LED_CHECKPOINT_9') # After relocation to DDR (to 0x4000000+ )
         self.cfile+='''/*
    Remap DDR to zero, FILTERSTART
@@ -479,6 +493,9 @@ void lowlevel_init(void)
 \ts= (int *) 0x4000000;
 \td= (int *) 0;
 \twhile (d < ((int *) 0x30000)) *d++=*s++;
+
+\tddrc_wait_queue_empty(); /* Wait no commands are pending in DDRC queue */   
+
 /*
    Continue with the original low-level init, Now we have 2 copies of the code again,
    currently executing somewhere above 0x4000000. But as soon as we will return
@@ -493,6 +510,9 @@ void lowlevel_init(void)
 \t/* Urgent write, ports S2/S3 */
 \twritel(0xC, &slcr_base->ddr_urgent);
 '''
+        if 'uart_xmit' in self.sections:
+            self.cfile+='\tuart_wait_tx_fifo_empty(); /* u-boot may re-program UART differently, wait all is sent before getting there */\n'
+#uart_wait_tx_fifo_empty() - add if u-boot debug is on
         self._cp_led('LED_CHECKPOINT_12') # Before leaving lowlevel_init()
         self.cfile+='''/* Lock SLCR back after everything with it is done */
 \tlock_slcr();

ezynqcfg.py

@@ -354,7 +354,6 @@ if raw_config_value('CONFIG_EZYNQ_SKIP_DDR', raw_configs) is None:
     segments.append({'TO':len(reg_sets),'RBL':True,'NAME':'DDR0','TITLE':'DDR registers configuration'})
 else:
     print 'Debug mode: skipping DDR-related configuration'
-
 #initialize clocks
 # unlock slcr - it is locked by RBL, but attempt to unlock in RBL will fail (and hang the system)
 reg_sets=clk.clocks_regs_setup(reg_sets,force)
@@ -405,6 +404,14 @@ if not led_debug_mio_pin is None:
     reg_sets_led=mio_regs.generate_led_off_on(led_debug_mio_pin)
     reg_sets.extend (reg_sets_led) # just to be listed, not to be loaded
     segments.append({'TO':len(reg_sets),'RBL':False,'NAME':'LED','TITLE':'registers/data to turn on/off debug LED - listed out of sequence'})
+
+#add code to check DDRC status (no commands in queue)    
+reg_sets_ddrc_sta=ddr.generate_command_queue_empty()
+reg_sets.extend (reg_sets_ddrc_sta) # just to be listed, not to be loaded
+segments.append({'TO':len(reg_sets),'RBL':False,'NAME':'DDRC_STA','TITLE':'resgister to test DDRC comamnd queue status - listed out of sequence'})
+    
+    
+    
 #    def generate_led_off_on(self, mio_pin):
 #CONFIG_EZYNQ_LED_DEBUG=47 # toggle LED during boot
 #CONFIG_EZYNQ_BOOT_DEBUG
@@ -504,9 +511,14 @@ if 'UART_XMIT' in segment_dict:
 #if not u_boot.features.get_par_value_or_none('BOOT_DEBUG') is None:
     
 if 'DCI' in segment_dict: 
-    u_boot.dci_calibration(reg_sets[segment_dict['DCI']['FROM']:segment_dict['DCI']['TO']],ddr)
-if 'DDR' in segment_dict: 
-    u_boot.ddr_start      (reg_sets[segment_dict['DDR']['FROM']:segment_dict['DDR']['TO']],ddr)
+    u_boot.dci_calibration(reg_sets[segment_dict['DCI']['FROM']:segment_dict['DCI']['TO']])
+if 'DDR_START' in segment_dict: 
+    u_boot.ddr_start      (reg_sets[segment_dict['DDR_START']['FROM']:segment_dict['DDR_START']['TO']])
+if 'DDRC_STA' in segment_dict: 
+    u_boot.ddrc_wait_empty_queue(reg_sets[segment_dict['DDRC_STA']['FROM']:segment_dict['DDRC_STA']['TO']])
+    
+#segments.append({'TO':len(reg_sets),'RBL':False,'NAME':'DDRC_STA','TITLE':'resgister to test DDRC comamnd queue status - listed out of sequence'})
+    
 u_boot.make_lowlevel_init()
 u_boot.output_c_file(args.lowlevel)
 #print u_boot.get_c_file()

test.mk

@@ -10,10 +10,10 @@ CONFIG_EZYNQ_DUMP_DDRC_LATE = y # Dump DDRC registers after DDR memory is initia
 #Turning LED on/off at different stages of the boot process. Requires CONFIG_EZYNQ_LED_DEBUG to be set
 #If defined, each can be 0,1, ON or OFF
 CONFIG_EZYNQ_LED_CHECKPOINT_1  = ON  # in RBL setup, as soon as MIO is programmed 
-#CONFIG_EZYNQ_LED_CHECKPOINT_2  = OFF # First after getting to user code 
-#CONFIG_EZYNQ_LED_CHECKPOINT_3  = ON  # After setting clock registers 
-#CONFIG_EZYNQ_LED_CHECKPOINT_4  = OFF # After PLL bypass is OFF
-#CONFIG_EZYNQ_LED_CHECKPOINT_5  = ON  # After UART is programmed
+CONFIG_EZYNQ_LED_CHECKPOINT_2  = OFF # First after getting to user code 
+CONFIG_EZYNQ_LED_CHECKPOINT_3  = ON  # After setting clock registers 
+CONFIG_EZYNQ_LED_CHECKPOINT_4  = OFF # After PLL bypass is OFF
+CONFIG_EZYNQ_LED_CHECKPOINT_5  = ON  # After UART is programmed
 CONFIG_EZYNQ_LED_CHECKPOINT_6  = OFF # After DCI is calibrated
 CONFIG_EZYNQ_LED_CHECKPOINT_7  = ON  # After DDR is initialized
 CONFIG_EZYNQ_LED_CHECKPOINT_8  = OFF # Before relocation to DDR (to 0x4000000+ )