mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-13 14:46:21 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
115 lines
2.2 KiB
C
115 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2007 Michal Simek
|
|
*
|
|
* Michal SIMEK <monstr@monstr.eu>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <fdtdec.h>
|
|
#include <asm/microblaze_timer.h>
|
|
#include <asm/microblaze_intc.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
volatile int timestamp = 0;
|
|
microblaze_timer_t *tmr;
|
|
|
|
ulong get_timer (ulong base)
|
|
{
|
|
if (tmr)
|
|
return timestamp - base;
|
|
return timestamp++ - base;
|
|
}
|
|
|
|
void __udelay(unsigned long usec)
|
|
{
|
|
u32 i;
|
|
|
|
if (tmr) {
|
|
i = get_timer(0);
|
|
while ((get_timer(0) - i) < (usec / 1000))
|
|
;
|
|
}
|
|
}
|
|
|
|
#ifndef CONFIG_SPL_BUILD
|
|
static void timer_isr(void *arg)
|
|
{
|
|
timestamp++;
|
|
tmr->control = tmr->control | TIMER_INTERRUPT;
|
|
}
|
|
|
|
int timer_init (void)
|
|
{
|
|
int irq = -1;
|
|
u32 preload = 0;
|
|
u32 ret = 0;
|
|
const void *blob = gd->fdt_blob;
|
|
int node = 0;
|
|
u32 cell[2];
|
|
|
|
debug("TIMER: Initialization\n");
|
|
|
|
node = fdt_node_offset_by_compatible(blob, node,
|
|
"xlnx,xps-timer-1.00.a");
|
|
if (node != -1) {
|
|
fdt_addr_t base = fdtdec_get_addr(blob, node, "reg");
|
|
if (base == FDT_ADDR_T_NONE)
|
|
return -1;
|
|
|
|
debug("TIMER: Base addr %lx\n", base);
|
|
tmr = (microblaze_timer_t *)base;
|
|
|
|
ret = fdtdec_get_int_array(blob, node, "interrupts",
|
|
cell, ARRAY_SIZE(cell));
|
|
if (ret)
|
|
return ret;
|
|
|
|
irq = cell[0];
|
|
debug("TIMER: IRQ %x\n", irq);
|
|
|
|
preload = fdtdec_get_int(blob, node, "clock-frequency", 0);
|
|
preload /= CONFIG_SYS_HZ;
|
|
} else {
|
|
return node;
|
|
}
|
|
|
|
if (tmr && preload && irq >= 0) {
|
|
tmr->loadreg = preload;
|
|
tmr->control = TIMER_INTERRUPT | TIMER_RESET;
|
|
tmr->control = TIMER_ENABLE | TIMER_ENABLE_INTR |\
|
|
TIMER_RELOAD | TIMER_DOWN_COUNT;
|
|
timestamp = 0;
|
|
ret = install_interrupt_handler (irq, timer_isr, (void *)tmr);
|
|
if (ret)
|
|
tmr = NULL;
|
|
}
|
|
/* No problem if timer is not found/initialized */
|
|
return 0;
|
|
}
|
|
#else
|
|
int timer_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* This function is derived from PowerPC code (read timebase as long long).
|
|
* On Microblaze it just returns the timer value.
|
|
*/
|
|
unsigned long long get_ticks(void)
|
|
{
|
|
return get_timer(0);
|
|
}
|
|
|
|
/*
|
|
* This function is derived from PowerPC code (timebase clock frequency).
|
|
* On Microblaze it returns the number of timer ticks per second.
|
|
*/
|
|
ulong get_tbclk(void)
|
|
{
|
|
return CONFIG_SYS_HZ;
|
|
}
|