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/*
* Copyright (c) 2017 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <info@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <bsp.h>
#include <bsp/bootcard.h>
#include <bsp/fatal.h>
#include <bsp/fdt.h>
#include <bsp/irq-generic.h>
#include <bsp/linker-symbols.h>
#include <dev/clock/arm-generic-timer.h>
#include <libfdt.h>
#define MAGIC_IRQ_OFFSET 32
void *imx_get_reg_of_node(const void *fdt, int node)
{
int len;
const uint32_t *val;
val = fdt_getprop(fdt, node, "reg", &len);
if (val == NULL || len < 4) {
return NULL;
}
return (void *) fdt32_to_cpu(val[0]);
}
rtems_vector_number imx_get_irq_of_node(
const void *fdt,
int node,
size_t index
)
{
int len;
const uint32_t *val;
val = fdt_getprop(fdt, node, "interrupts", &len);
if (val == NULL || len < (int) ((index + 1) * 12)) {
return BSP_INTERRUPT_VECTOR_INVALID;
}
return fdt32_to_cpu(val[index * 3 + 1]) + MAGIC_IRQ_OFFSET;
}
uint32_t bsp_fdt_map_intr(const uint32_t *intr, size_t icells)
{
return intr[1] + MAGIC_IRQ_OFFSET;
}
void arm_generic_timer_get_config(
uint32_t *frequency,
uint32_t *irq
)
{
const void *fdt;
int node;
int len;
const uint32_t *val;
fdt = bsp_fdt_get();
node = fdt_path_offset(fdt, "/timer");
val = fdt_getprop(fdt, node, "clock-frequency", &len);
if (val != NULL && len >= 4) {
*frequency = fdt32_to_cpu(val[0]);
} else {
bsp_fatal(IMX_FATAL_GENERIC_TIMER_FREQUENCY);
}
/* FIXME: Figure out how Linux gets a proper IRQ number */
*irq = imx_get_irq_of_node(fdt, node, 0) - 16;
}
uintptr_t imx_gic_dist_base;
static void imx_find_gic(const void *fdt)
{
int node;
node = fdt_path_offset(fdt, "/interrupt-controller");
if (node < 0) {
node = fdt_path_offset(fdt, "/soc/interrupt-controller");
}
imx_gic_dist_base = (uintptr_t) imx_get_reg_of_node(fdt, node);
}
void bsp_start(void)
{
imx_find_gic(bsp_fdt_get());
bsp_interrupt_initialize();
rtems_cache_coherent_add_area(
bsp_section_nocacheheap_begin,
(uintptr_t) bsp_section_nocacheheap_size
);
}
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