u-boot/arch/microblaze/cpu/interrupts.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
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>
2018-05-07 09:34:12 -04:00

213 lines
4.5 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2007 Michal Simek
* (C) Copyright 2004 Atmark Techno, Inc.
*
* Michal SIMEK <monstr@monstr.eu>
* Yasushi SHOJI <yashi@atmark-techno.com>
*/
#include <common.h>
#include <command.h>
#include <fdtdec.h>
#include <malloc.h>
#include <asm/microblaze_intc.h>
#include <asm/asm.h>
DECLARE_GLOBAL_DATA_PTR;
void enable_interrupts(void)
{
debug("Enable interrupts for the whole CPU\n");
MSRSET(0x2);
}
int disable_interrupts(void)
{
unsigned int msr;
MFS(msr, rmsr);
MSRCLR(0x2);
return (msr & 0x2) != 0;
}
static struct irq_action *vecs;
static u32 irq_no;
/* mapping structure to interrupt controller */
microblaze_intc_t *intc;
/* default handler */
static void def_hdlr(void)
{
puts("def_hdlr\n");
}
static void enable_one_interrupt(int irq)
{
int mask;
int offset = 1;
offset <<= irq;
mask = intc->ier;
intc->ier = (mask | offset);
debug("Enable one interrupt irq %x - mask %x,ier %x\n", offset, mask,
intc->ier);
debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
intc->iar, intc->mer);
}
static void disable_one_interrupt(int irq)
{
int mask;
int offset = 1;
offset <<= irq;
mask = intc->ier;
intc->ier = (mask & ~offset);
debug("Disable one interrupt irq %x - mask %x,ier %x\n", irq, mask,
intc->ier);
debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
intc->iar, intc->mer);
}
int install_interrupt_handler(int irq, interrupt_handler_t *hdlr, void *arg)
{
struct irq_action *act;
/* irq out of range */
if ((irq < 0) || (irq > irq_no)) {
puts("IRQ out of range\n");
return -1;
}
act = &vecs[irq];
if (hdlr) { /* enable */
act->handler = hdlr;
act->arg = arg;
act->count = 0;
enable_one_interrupt(irq);
return 0;
}
/* Disable */
act->handler = (interrupt_handler_t *)def_hdlr;
act->arg = (void *)irq;
disable_one_interrupt(irq);
return 1;
}
/* initialization interrupt controller - hardware */
static void intc_init(void)
{
intc->mer = 0;
intc->ier = 0;
intc->iar = 0xFFFFFFFF;
/* XIntc_Start - hw_interrupt enable and all interrupt enable */
intc->mer = 0x3;
debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
intc->iar, intc->mer);
}
int interrupt_init(void)
{
int i;
const void *blob = gd->fdt_blob;
int node = 0;
debug("INTC: Initialization\n");
node = fdt_node_offset_by_compatible(blob, node,
"xlnx,xps-intc-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("INTC: Base addr %lx\n", base);
intc = (microblaze_intc_t *)base;
irq_no = fdtdec_get_int(blob, node, "xlnx,num-intr-inputs", 0);
debug("INTC: IRQ NO %x\n", irq_no);
} else {
return node;
}
if (irq_no) {
vecs = calloc(1, sizeof(struct irq_action) * irq_no);
if (vecs == NULL) {
puts("Interrupt vector allocation failed\n");
return -1;
}
/* initialize irq list */
for (i = 0; i < irq_no; i++) {
vecs[i].handler = (interrupt_handler_t *)def_hdlr;
vecs[i].arg = (void *)i;
vecs[i].count = 0;
}
/* initialize intc controller */
intc_init();
enable_interrupts();
} else {
puts("Undefined interrupt controller\n");
}
return 0;
}
void interrupt_handler(void)
{
int irqs = intc->ivr; /* find active interrupt */
int mask = 1;
int value;
struct irq_action *act = vecs + irqs;
debug("INTC isr %x, ier %x, iar %x, mer %x\n", intc->isr, intc->ier,
intc->iar, intc->mer);
#ifdef DEBUG
R14(value);
#endif
debug("Interrupt handler on %x line, r14 %x\n", irqs, value);
debug("Jumping to interrupt handler rutine addr %x,count %x,arg %x\n",
(u32)act->handler, act->count, (u32)act->arg);
act->handler(act->arg);
act->count++;
intc->iar = mask << irqs;
debug("Dump INTC reg, isr %x, ier %x, iar %x, mer %x\n", intc->isr,
intc->ier, intc->iar, intc->mer);
#ifdef DEBUG
R14(value);
#endif
debug("Interrupt handler on %x line, r14 %x\n", irqs, value);
}
#if defined(CONFIG_CMD_IRQ)
int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, const char *argv[])
{
int i;
struct irq_action *act = vecs;
if (irq_no) {
puts("\nInterrupt-Information:\n\n"
"Nr Routine Arg Count\n"
"-----------------------------\n");
for (i = 0; i < irq_no; i++) {
if (act->handler != (interrupt_handler_t *)def_hdlr) {
printf("%02d %08x %08x %d\n", i,
(int)act->handler, (int)act->arg,
act->count);
}
act++;
}
puts("\n");
} else {
puts("Undefined interrupt controller\n");
}
return 0;
}
#endif