[U-Boot] [RFC PATCH 3/6] integratorcp: split timer support

Jean-Christophe PLAGNIOL-VILLARD plagnioj at jcrosoft.com
Fri May 1 18:41:29 CEST 2009


Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
Cc: Peter Pearse <Peter.Pearse at arm.com>
---
 board/armltd/integratorcp/Makefile                 |    5 +-
 board/armltd/integratorcp/integratorcp.c           |  140 --------------------
 .../integratorcp/{integratorcp.c => timer.c}       |  103 --------------
 3 files changed, 4 insertions(+), 244 deletions(-)
 copy board/armltd/integratorcp/{integratorcp.c => timer.c} (68%)

diff --git a/board/armltd/integratorcp/Makefile b/board/armltd/integratorcp/Makefile
index 92a1a07..5e3c646 100644
--- a/board/armltd/integratorcp/Makefile
+++ b/board/armltd/integratorcp/Makefile
@@ -25,9 +25,12 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	:= integratorcp.o flash.o
 SOBJS	:= lowlevel_init.o
 
+COBJS	:= integratorcp.o
+COBJS	+= flash.o
+COBJS	+= timer.o
+
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
diff --git a/board/armltd/integratorcp/integratorcp.c b/board/armltd/integratorcp/integratorcp.c
index 0d3afd8..16620bb 100644
--- a/board/armltd/integratorcp/integratorcp.c
+++ b/board/armltd/integratorcp/integratorcp.c
@@ -34,7 +34,6 @@
  */
 
 #include <common.h>
-#include <div64.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -138,142 +137,3 @@ extern void dram_query(void);
 
 	return 0;
 }
-
-/* The Integrator/CP timer1 is clocked at 1MHz
- * can be divided by 16 or 256
- * and can be set up as a 32-bit timer
- */
-/* U-Boot expects a 32 bit timer, running at CONFIG_SYS_HZ */
-/* Keep total timer count to avoid losing decrements < div_timer */
-static unsigned long long total_count = 0;
-static unsigned long long lastdec;	 /* Timer reading at last call	   */
-static unsigned long long div_clock = 1; /* Divisor applied to timer clock */
-static unsigned long long div_timer = 1; /* Divisor to convert timer reading
-					  * change to U-Boot ticks
-					  */
-/* CONFIG_SYS_HZ = CONFIG_SYS_HZ_CLOCK/(div_clock * div_timer) */
-static ulong timestamp;		/* U-Boot ticks since startup	      */
-
-#define TIMER_LOAD_VAL ((ulong)0xFFFFFFFF)
-#define READ_TIMER (*(volatile ulong *)(CONFIG_SYS_TIMERBASE+4))
-
-/* all function return values in U-Boot ticks i.e. (1/CONFIG_SYS_HZ) sec
- *  - unless otherwise stated
- */
-
-/* starts up a counter
- * - the Integrator/CP timer can be set up to issue an interrupt */
-int timer_init (void)
-{
-	/* Load timer with initial value */
-	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 0) = TIMER_LOAD_VAL;
-	/* Set timer to be
-	 *	enabled		  1
-	 *	periodic	  1
-	 *	no interrupts	  0
-	 *	X		  0
-	 *	divider 1	 00 == less rounding error
-	 *	32 bit		  1
-	 *	wrapping	  0
-	 */
-	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = 0x000000C2;
-	/* init the timestamp */
-	total_count = 0ULL;
-	reset_timer_masked();
-
-	div_timer  = (unsigned long long)(CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ);
-	div_timer /= div_clock;
-
-	return (0);
-}
-
-/*
- * timer without interrupts
- */
-void reset_timer (void)
-{
-	reset_timer_masked ();
-}
-
-ulong get_timer (ulong base_ticks)
-{
-	return get_timer_masked () - base_ticks;
-}
-
-void set_timer (ulong ticks)
-{
-	timestamp   = ticks;
-	total_count = (unsigned long long)ticks * div_timer;
-}
-
-/* delay usec useconds */
-void udelay (unsigned long usec)
-{
-	ulong tmo, tmp;
-
-	/* Convert to U-Boot ticks */
-	tmo  = usec * CONFIG_SYS_HZ;
-	tmo /= (1000000L);
-
-	tmp  = get_timer_masked();	/* get current timestamp */
-	tmo += tmp;			/* form target timestamp */
-
-	while (get_timer_masked () < tmo) {/* loop till event */
-		/*NOP*/;
-	}
-}
-
-void reset_timer_masked (void)
-{
-	/* capure current decrementer value    */
-	lastdec	  = (unsigned long long)READ_TIMER;
-	/* start "advancing" time stamp from 0 */
-	timestamp = 0L;
-}
-
-/* converts the timer reading to U-Boot ticks	       */
-/* the timestamp is the number of ticks since reset    */
-ulong get_timer_masked (void)
-{
-	/* get current count */
-	unsigned long long now = (unsigned long long)READ_TIMER;
-
-	if(now > lastdec) {
-		/* Must have wrapped */
-		total_count += lastdec + TIMER_LOAD_VAL + 1 - now;
-	} else {
-		total_count += lastdec - now;
-	}
-	lastdec	  = now;
-
-	/* Reuse "now" */
-	now = total_count;
-	do_div(now, div_timer);
-	timestamp = now;
-
-	return timestamp;
-}
-
-/* waits specified delay value and resets timestamp */
-void udelay_masked (unsigned long usec)
-{
-	udelay(usec);
-}
-
-/*
- * This function is derived from PowerPC code (read timebase as long long).
- * On ARM it just returns the timer value.
- */
-unsigned long long get_ticks(void)
-{
-	return (unsigned long long)get_timer(0);
-}
-
-/*
- * Return the timebase clock frequency
- * i.e. how often the timer decrements
- */
-ulong get_tbclk (void)
-{
-	return (ulong)(((unsigned long long)CONFIG_SYS_HZ_CLOCK)/div_clock);
-}
diff --git a/board/armltd/integratorcp/integratorcp.c b/board/armltd/integratorcp/timer.c
similarity index 68%
copy from board/armltd/integratorcp/integratorcp.c
copy to board/armltd/integratorcp/timer.c
index 0d3afd8..741035c 100644
--- a/board/armltd/integratorcp/integratorcp.c
+++ b/board/armltd/integratorcp/timer.c
@@ -36,109 +36,6 @@
 #include <common.h>
 #include <div64.h>
 
-DECLARE_GLOBAL_DATA_PTR;
-
-void flash__init (void);
-void ether__init (void);
-void peripheral_power_enable (void);
-
-#if defined(CONFIG_SHOW_BOOT_PROGRESS)
-void show_boot_progress(int progress)
-{
-	printf("Boot reached stage %d\n", progress);
-}
-#endif
-
-#define COMP_MODE_ENABLE ((unsigned int)0x0000EAEF)
-
-/*
- * Miscellaneous platform dependent initialisations
- */
-
-int board_init (void)
-{
-	/* arch number of Integrator Board */
-	gd->bd->bi_arch_number = MACH_TYPE_CINTEGRATOR;
-
-	/* adress of boot parameters */
-	gd->bd->bi_boot_params = 0x00000100;
-
-	gd->flags = 0;
-
-#ifdef CONFIG_CM_REMAP
-extern void cm_remap(void);
-	cm_remap();	/* remaps writeable memory to 0x00000000 */
-#endif
-
-	icache_enable ();
-
-	flash__init ();
-	ether__init ();
-	return 0;
-}
-
-
-int misc_init_r (void)
-{
-	setenv("verify", "n");
-	return (0);
-}
-
-/******************************
- Routine:
- Description:
-******************************/
-void flash__init (void)
-{
-}
-/*************************************************************
- Routine:ether__init
- Description: take the Ethernet controller out of reset and wait
-	      for the EEPROM load to complete.
-*************************************************************/
-void ether__init (void)
-{
-}
-
-/******************************
- Routine:
- Description:
-******************************/
-int dram_init (void)
-{
-	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
-	gd->bd->bi_dram[0].size	 = PHYS_SDRAM_1_SIZE;
-
-#ifdef CONFIG_CM_SPD_DETECT
-    {
-extern void dram_query(void);
-	unsigned long cm_reg_sdram;
-	unsigned long sdram_shift;
-
-	dram_query();	/* Assembler accesses to CM registers */
-			/* Queries the SPD values	      */
-
-	/* Obtain the SDRAM size from the CM SDRAM register */
-
-	cm_reg_sdram = *(volatile ulong *)(CM_BASE + OS_SDRAM);
-	/*   Register	      SDRAM size
-	 *
-	 *   0xXXXXXXbbb000bb	 16 MB
-	 *   0xXXXXXXbbb001bb	 32 MB
-	 *   0xXXXXXXbbb010bb	 64 MB
-	 *   0xXXXXXXbbb011bb	128 MB
-	 *   0xXXXXXXbbb100bb	256 MB
-	 *
-	 */
-	sdram_shift		 = ((cm_reg_sdram & 0x0000001C)/4)%4;
-	gd->bd->bi_dram[0].size	 = 0x01000000 << sdram_shift;
-
-    }
-#endif /* CM_SPD_DETECT */
-
-	return 0;
-}
-
 /* The Integrator/CP timer1 is clocked at 1MHz
  * can be divided by 16 or 256
  * and can be set up as a 32-bit timer
-- 
1.6.1.3



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