Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-11 07:34:31 +00:00
Code Issues Projects Releases Packages Wiki Activity

sparc: Update cpu_init.c to use generic timer infrastructure

Browse source 
Introduce the CONFIG_SYS_TIMER_* macros in include/asm/config.h to make use
of the generic timer infrastructure in lib/time.c.

Created a timer_init() function to initialize the timer hardware and update
the #ifdef in board_init_f to allow this function to be called during the
start-up sequence.

Signed-off-by: Francois Retief <fgretief@spaceteq.co.za>
This commit is contained in:
Francois Retief 2015-10-28 15:18:22 +02:00
parent c837901bf1
commit c97088c3cf
6 changed files with 106 additions and 75 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

37
arch/sparc/cpu/leon2/cpu_init.c
View file

@ -10,6 +10,7 @@
#include <common.h>
#include <asm/asi.h>
#include <asm/leon.h>
#include <asm/io.h>
#include <config.h>
@ -54,6 +55,9 @@ void cpu_init_f(void)
#else
leon2->PIO_Interrupt = 0;
#endif
/* disable timers */
leon2->Timer_Control_1 = leon2->Timer_Control_2 = 0;
}
int arch_cpu_init(void)
@ -66,17 +70,11 @@ int arch_cpu_init(void)
}
/*
* initialize higher level parts of CPU like time base and timers
* initialize higher level parts of CPU
*/
int cpu_init_r(void)
{
LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
/* initialize prescaler common to all timers to 1MHz */
leon2->Scaler_Counter = leon2->Scaler_Reload =
(((CONFIG_SYS_CLK_FREQ / 1000) + 500) / 1000) - 1;
return (0);
return 0;
}
/* Uses Timer 0 to get accurate
@ -106,11 +104,6 @@ int timer_interrupt_init_cpu(void)
return LEON2_TIMER1_IRQNO;
}
ulong get_tbclk(void)
{
return TIMER_BASE_CLK;
}
/*
* This function is intended for SHORT delays only.
*/
@ -125,3 +118,21 @@ unsigned long cpu_ticks2usec(unsigned long ticks)
{
return ticks * US_PER_TICK;
}
int timer_init(void)
{
LEON2_regs *leon2 = (LEON2_regs *)LEON2_PREGS;
/* initialize prescaler common to all timers to 1MHz */
leon2->Scaler_Counter = leon2->Scaler_Reload =
(((CONFIG_SYS_CLK_FREQ / 1000) + 500) / 1000) - 1;
/* SYS_HZ ticks per second */
leon2->Timer_Counter_1 = 0;
leon2->Timer_Reload_1 = (CONFIG_SYS_TIMER_RATE / CONFIG_SYS_HZ) - 1;
leon2->Timer_Control_1 = LEON2_TIMER_CTRL_EN | LEON2_TIMER_CTRL_RS |
LEON2_TIMER_CTRL_LD;
CONFIG_SYS_TIMER_COUNTER = (void *)&leon2->Timer_Counter_1;
return 0;
}

131
arch/sparc/cpu/leon3/cpu_init.c
View file

@ -10,6 +10,7 @@
#include <common.h>
#include <asm/asi.h>
#include <asm/leon.h>
#include <asm/io.h>
#include <ambapp.h>
#include <grlib/irqmp.h>
#include <grlib/gptimer.h>
@ -22,14 +23,17 @@
#define CONFIG_AMBAPP_IOAREA AMBA_DEFAULT_IOAREA
#endif
/* Select which TIMER that will become the time base */
#ifndef CONFIG_SYS_GRLIB_GPTIMER_INDEX
#define CONFIG_SYS_GRLIB_GPTIMER_INDEX 0
#endif
#define TIMER_BASE_CLK 1000000
#define US_PER_TICK (1000000 / CONFIG_SYS_HZ)
DECLARE_GLOBAL_DATA_PTR;
ambapp_dev_irqmp *irqmp = NULL;
ambapp_dev_gptimer *gptimer = NULL;
unsigned int gptimer_irq = 0;
/*
* Breath some life into the CPU...
@ -59,6 +63,9 @@ static unsigned int snoop_detect(void)
int arch_cpu_init(void)
{
ambapp_apbdev apbdev;
int index;
gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
gd->bus_clk = CONFIG_SYS_CLK_FREQ;
gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
@ -70,6 +77,35 @@ int arch_cpu_init(void)
*/
ambapp_bus_init(CONFIG_AMBAPP_IOAREA, CONFIG_SYS_CLK_FREQ, &ambapp_plb);
/* Initialize/clear all the timers in the system.
*/
for (index = 0; ambapp_apb_find(&ambapp_plb, VENDOR_GAISLER,
GAISLER_GPTIMER, index, &apbdev) == 1; index++) {
ambapp_dev_gptimer *timer;
unsigned int bus_freq;
int i, ntimers;
timer = (ambapp_dev_gptimer *)apbdev.address;
/* Different buses may have different frequency, the
* frequency of the bus tell in which frequency the timer
* prescaler operates.
*/
bus_freq = ambapp_bus_freq(&ambapp_plb, apbdev.ahb_bus_index);
/* Initialize prescaler common to all timers to 1MHz */
timer->scalar = timer->scalar_reload =
(((bus_freq / 1000) + 500) / 1000) - 1;
/* Clear all timers */
ntimers = timer->config & 0x7;
for (i = 0; i < ntimers; i++) {
timer->e[i].ctrl = GPTIMER_CTRL_IP;
timer->e[i].rld = 0;
timer->e[i].ctrl = GPTIMER_CTRL_LD;
}
}
return 0;
}
@ -79,9 +115,7 @@ int arch_cpu_init(void)
int cpu_init_r(void)
{
ambapp_apbdev apbdev;
int index, cpu, ntimers, i;
ambapp_dev_gptimer *timer = NULL;
unsigned int bus_freq;
int cpu;
/*
* Find AMBA APB IRQMP Controller,
@ -104,40 +138,6 @@ int cpu_init_r(void)
irqmp->cpu_force[cpu] = 0;
}
/* timer */
index = 0;
while (ambapp_apb_find(&ambapp_plb, VENDOR_GAISLER, GAISLER_GPTIMER,
index, &apbdev) == 1) {
timer = (ambapp_dev_gptimer *)apbdev.address;
if (gptimer == NULL) {
gptimer = timer;
gptimer_irq = apbdev.irq;
}
/* Different buses may have different frequency, the
* frequency of the bus tell in which frequency the timer
* prescaler operates.
*/
bus_freq = ambapp_bus_freq(&ambapp_plb, apbdev.ahb_bus_index);
/* initialize prescaler common to all timers to 1MHz */
timer->scalar = timer->scalar_reload =
(((bus_freq / 1000) + 500) / 1000) - 1;
/* Clear All Timers */
ntimers = timer->config & 0x7;
for (i = 0; i < ntimers; i++) {
timer->e[i].ctrl = GPTIMER_CTRL_IP;
timer->e[i].rld = 0;
timer->e[i].ctrl = GPTIMER_CTRL_LD;
}
index++;
}
if (!gptimer) {
printf("%s: gptimer not found!\n", __func__);
return 1;
}
return 0;
}
@ -151,25 +151,9 @@ void cpu_wait_ticks(unsigned long ticks)
while (get_timer(start) < ticks) ;
}
/* initiate and setup timer0 interrupt to configured HZ. Base clock is 1MHz.
* Return irq number for timer int or a negative number for
* dealing with self
*/
int timer_interrupt_init_cpu(void)
{
/* SYS_HZ ticks per second */
gptimer->e[0].val = 0;
gptimer->e[0].rld = (TIMER_BASE_CLK / CONFIG_SYS_HZ) - 1;
gptimer->e[0].ctrl =
(GPTIMER_CTRL_EN | GPTIMER_CTRL_RS |
GPTIMER_CTRL_LD | GPTIMER_CTRL_IE);
return gptimer_irq;
}
ulong get_tbclk(void)
{
return TIMER_BASE_CLK;
return -1;
}
/*
@ -186,3 +170,38 @@ unsigned long cpu_ticks2usec(unsigned long ticks)
{
return ticks * US_PER_TICK;
}
int timer_init(void)
{
ambapp_dev_gptimer_element *tmr;
ambapp_dev_gptimer *gptimer;
ambapp_apbdev apbdev;
unsigned bus_freq;
if (ambapp_apb_find(&ambapp_plb, VENDOR_GAISLER, GAISLER_GPTIMER,
CONFIG_SYS_GRLIB_GPTIMER_INDEX, &apbdev) != 1) {
panic("%s: gptimer not found!\n", __func__);
return -1;
}
gptimer = (ambapp_dev_gptimer *) apbdev.address;
/* Different buses may have different frequency, the
* frequency of the bus tell in which frequency the timer
* prescaler operates.
*/
bus_freq = ambapp_bus_freq(&ambapp_plb, apbdev.ahb_bus_index);
/* initialize prescaler common to all timers to 1MHz */
gptimer->scalar = gptimer->scalar_reload =
(((bus_freq / 1000) + 500) / 1000) - 1;
tmr = (ambapp_dev_gptimer_element *)&gptimer->e[0];
tmr->val = 0;
tmr->rld = ~0;
tmr->ctrl = GPTIMER_CTRL_EN | GPTIMER_CTRL_RS | GPTIMER_CTRL_LD;
CONFIG_SYS_TIMER_COUNTER = (void *)&tmr->val;
return 0;
}

4
arch/sparc/include/asm/config.h
View file

@ -14,4 +14,8 @@
#define CONFIG_LMB
#define CONFIG_SYS_BOOT_RAMDISK_HIGH
#define CONFIG_SYS_TIMER_RATE 1000000 /* 1MHz */
#define CONFIG_SYS_TIMER_COUNTER gd->arch.timer
#define CONFIG_SYS_TIMER_COUNTS_DOWN
#endif

1
arch/sparc/include/asm/global_data.h
View file

@ -15,6 +15,7 @@
/* Architecture-specific global data */
struct arch_global_data {
void *timer;
void *uart;
unsigned int uart_freq;
#ifdef CONFIG_LEON3

5
arch/sparc/lib/interrupts.c
View file

@ -81,11 +81,6 @@ void timer_interrupt(struct pt_regs *regs)
timestamp++;
}
ulong get_timer(ulong base)
{
return (timestamp - base);
}
void timer_interrupt_init(void)
{
int irq;

3
common/board_f.c
View file

@ -808,7 +808,8 @@ static init_fnc_t init_sequence_f[] = {
init_timebase,
#endif
#if defined(CONFIG_X86) || defined(CONFIG_ARM) || defined(CONFIG_MIPS) || \
defined(CONFIG_BLACKFIN) || defined(CONFIG_NDS32)
defined(CONFIG_BLACKFIN) || defined(CONFIG_NDS32) || \
defined(CONFIG_SPARC)
timer_init, /* initialize timer */
#endif
#ifdef CONFIG_SYS_ALLOC_DPRAM