[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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