arm/arm64: timer: Extract irqs at setup time
The timer can be useful for other tests besides the timer test.
Extract the DT parsing of the irqs out of the timer test into
setup and provide them along with some defines in a new timer.h
file.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arm/timer.c b/arm/timer.c
index 44621b4..09e3f8f 100644
--- a/arm/timer.c
+++ b/arm/timer.c
@@ -8,15 +8,12 @@
#include <libcflat.h>
#include <devicetree.h>
#include <errata.h>
+#include <asm/timer.h>
#include <asm/delay.h>
#include <asm/processor.h>
#include <asm/gic.h>
#include <asm/io.h>
-#define ARCH_TIMER_CTL_ENABLE (1 << 0)
-#define ARCH_TIMER_CTL_IMASK (1 << 1)
-#define ARCH_TIMER_CTL_ISTATUS (1 << 2)
-
static void *gic_isenabler;
static void *gic_icenabler;
@@ -108,7 +105,6 @@
struct timer_info {
u32 irq;
- u32 irq_flags;
volatile bool irq_received;
u64 (*read_counter)(void);
u64 (*read_cval)(void);
@@ -304,23 +300,9 @@
static void test_init(void)
{
- const struct fdt_property *prop;
- const void *fdt = dt_fdt();
- int node, len;
- u32 *data;
-
- node = fdt_node_offset_by_compatible(fdt, -1, "arm,armv8-timer");
- assert(node >= 0);
- prop = fdt_get_property(fdt, node, "interrupts", &len);
- assert(prop && len == (4 * 3 * sizeof(u32)));
-
- data = (u32 *)prop->data;
- assert(fdt32_to_cpu(data[3]) == 1);
- ptimer_info.irq = fdt32_to_cpu(data[4]);
- ptimer_info.irq_flags = fdt32_to_cpu(data[5]);
- assert(fdt32_to_cpu(data[6]) == 1);
- vtimer_info.irq = fdt32_to_cpu(data[7]);
- vtimer_info.irq_flags = fdt32_to_cpu(data[8]);
+ assert(TIMER_PTIMER_IRQ != -1 && TIMER_VTIMER_IRQ != -1);
+ ptimer_info.irq = TIMER_PTIMER_IRQ;
+ vtimer_info.irq = TIMER_VTIMER_IRQ;
install_exception_handler(EL1H_SYNC, ESR_EL1_EC_UNKNOWN, ptimer_unsupported_handler);
ptimer_info.read_ctl();
diff --git a/lib/arm/asm/timer.h b/lib/arm/asm/timer.h
new file mode 100644
index 0000000..f75cc67
--- /dev/null
+++ b/lib/arm/asm/timer.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2020, Red Hat Inc, Andrew Jones <drjones@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.
+ */
+#ifndef _ASMARM_TIMER_H_
+#define _ASMARM_TIMER_H_
+
+#define ARCH_TIMER_CTL_ENABLE (1 << 0)
+#define ARCH_TIMER_CTL_IMASK (1 << 1)
+#define ARCH_TIMER_CTL_ISTATUS (1 << 2)
+
+#ifndef __ASSEMBLY__
+
+struct timer_state {
+ struct {
+ u32 irq;
+ u32 irq_flags;
+ } ptimer;
+ struct {
+ u32 irq;
+ u32 irq_flags;
+ } vtimer;
+};
+extern struct timer_state __timer_state;
+
+#define TIMER_PTIMER_IRQ (__timer_state.ptimer.irq)
+#define TIMER_VTIMER_IRQ (__timer_state.vtimer.irq)
+
+#endif /* !__ASSEMBLY__ */
+#endif /* _ASMARM_TIMER_H_ */
diff --git a/lib/arm/setup.c b/lib/arm/setup.c
index 418b4e5..78562e4 100644
--- a/lib/arm/setup.c
+++ b/lib/arm/setup.c
@@ -22,6 +22,7 @@
#include <asm/page.h>
#include <asm/processor.h>
#include <asm/smp.h>
+#include <asm/timer.h>
#include "io.h"
@@ -29,6 +30,8 @@
extern unsigned long stacktop;
+struct timer_state __timer_state;
+
char *initrd;
u32 initrd_size;
@@ -156,6 +159,43 @@
page_alloc_ops_enable();
}
+static void timer_save_state(void)
+{
+ const struct fdt_property *prop;
+ const void *fdt = dt_fdt();
+ int node, len;
+ u32 *data;
+
+ node = fdt_node_offset_by_compatible(fdt, -1, "arm,armv8-timer");
+ assert(node >= 0 || node == -FDT_ERR_NOTFOUND);
+
+ if (node == -FDT_ERR_NOTFOUND) {
+ __timer_state.ptimer.irq = -1;
+ __timer_state.vtimer.irq = -1;
+ return;
+ }
+
+ /*
+ * From Linux devicetree timer binding documentation
+ *
+ * interrupts <type irq flags>:
+ * secure timer irq
+ * non-secure timer irq (ptimer)
+ * virtual timer irq (vtimer)
+ * hypervisor timer irq
+ */
+ prop = fdt_get_property(fdt, node, "interrupts", &len);
+ assert(prop && len == (4 * 3 * sizeof(u32)));
+
+ data = (u32 *)prop->data;
+ assert(fdt32_to_cpu(data[3]) == 1 /* PPI */);
+ __timer_state.ptimer.irq = fdt32_to_cpu(data[4]);
+ __timer_state.ptimer.irq_flags = fdt32_to_cpu(data[5]);
+ assert(fdt32_to_cpu(data[6]) == 1 /* PPI */);
+ __timer_state.vtimer.irq = fdt32_to_cpu(data[7]);
+ __timer_state.vtimer.irq_flags = fdt32_to_cpu(data[8]);
+}
+
void setup(const void *fdt)
{
void *freemem = &stacktop;
@@ -211,6 +251,8 @@
io_init();
/* finish setup */
+ timer_save_state();
+
ret = dt_get_bootargs(&bootargs);
assert(ret == 0 || ret == -FDT_ERR_NOTFOUND);
setup_args_progname(bootargs);
diff --git a/lib/arm64/asm/timer.h b/lib/arm64/asm/timer.h
new file mode 100644
index 0000000..c0f5f88
--- /dev/null
+++ b/lib/arm64/asm/timer.h
@@ -0,0 +1 @@
+#include "../../arm/asm/timer.h"
