[src/trunk]: src/sys/arch/arm/cortex Add 'armgichist' KERNHIST for (future) d...

[skrll <skrll%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/91be00d1d318
branches:  trunk
changeset: 824868:91be00d1d318
user:      skrll <skrll%NetBSD.org@localhost>
date:      Thu Jun 22 06:51:30 2017 +0000

description:
Add 'armgichist' KERNHIST for (future) debugging.

diffstat:

 sys/arch/arm/cortex/gic.c |  62 +++++++++++++++++++++++++++++++++++++++++++---
 1 files changed, 57 insertions(+), 5 deletions(-)

diffs (165 lines):

diff -r 5174c5f0dcb8 -r 91be00d1d318 sys/arch/arm/cortex/gic.c
--- a/sys/arch/arm/cortex/gic.c Thu Jun 22 06:42:38 2017 +0000
+++ b/sys/arch/arm/cortex/gic.c Thu Jun 22 06:51:30 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: gic.c,v 1.24 2017/06/18 22:11:50 jmcneill Exp $        */
+/*     $NetBSD: gic.c,v 1.25 2017/06/22 06:51:30 skrll Exp $   */
 /*-
  * Copyright (c) 2012 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -29,19 +29,22 @@
  */
 
 #include "opt_ddb.h"
+#include "opt_kernhist.h"
 #include "opt_multiprocessor.h"
 
 #define _INTR_PRIVATE
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: gic.c,v 1.24 2017/06/18 22:11:50 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: gic.c,v 1.25 2017/06/22 06:51:30 skrll Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
+#include <sys/cpu.h>
 #include <sys/device.h>
 #include <sys/evcnt.h>
 #include <sys/intr.h>
-#include <sys/cpu.h>
+#include <sys/kernhist.h>
+#include <sys/once.h>
 #include <sys/proc.h>
 
 #include <arm/armreg.h>
@@ -71,6 +74,16 @@
 static void armgic_ipi_send(struct pic_softc *, const kcpuset_t *, u_long);
 #endif
 
+#ifdef KERNHIST
+static int armgichist_init(void);
+
+#ifndef ARMGICHIST_SIZE
+#define ARMGICHIST_SIZE 200
+#endif
+
+KERNHIST_DEFINE(armgichist);
+#endif
+
 static const struct pic_ops armgic_picops = {
        .pic_unblock_irqs = armgic_unblock_irqs,
        .pic_block_irqs = armgic_block_irqs,
@@ -238,12 +251,27 @@
 }
 #endif
 
+
+#ifdef KERNHIST
+int
+armgichist_init(void)
+{
+
+       KERNHIST_INIT(armgichist, ARMGICHIST_SIZE);
+
+       return 0;
+}
+#endif
+
 void
-armgic_irq_handler(void *tf)
+armgic_irq_handler(void *arg)
 {
+       KERNHIST_FUNC(__func__); KERNHIST_CALLED(armgichist);
        struct cpu_info * const ci = curcpu();
        struct armgic_softc * const sc = &armgic_softc;
        const int old_ipl = ci->ci_cpl;
+       struct trapframe * const tf = arg;
+       
 #ifdef DIAGNOSTIC
        const int old_mtx_count = ci->ci_mtx_count;
        const int old_l_biglocks = ci->ci_curlwp->l_biglocks;
@@ -257,9 +285,14 @@
        KASSERTMSG(old_ipl != IPL_HIGH, "old_ipl %d pmr %#x hppir %#x",
            old_ipl, gicc_read(sc, GICC_PMR), gicc_read(sc, GICC_HPPIR));
 
+       KERNHIST_LOG(armgichist, "old_ipl %d pmr %u hppir %u", old_ipl,
+           gicc_read(sc, GICC_PMR), gicc_read(sc, GICC_HPPIR), 0);
+
        for (;;) {
                uint32_t iar = gicc_read(sc, GICC_IAR);
                uint32_t irq = __SHIFTOUT(iar, GICC_IAR_IRQ);
+
+               KERNHIST_LOG(armgichist, "iar %#x (irq %d)", iar, irq, 0, 0);
                if (irq == GICC_IAR_IRQ_SPURIOUS) {
                        iar = gicc_read(sc, GICC_IAR);
                        irq = __SHIFTOUT(iar, GICC_IAR_IRQ);
@@ -284,6 +317,9 @@
                 * However, if are just raising ipl, we can just update ci_cpl.
                 */
                const int ipl = is->is_ipl;
+
+               KERNHIST_LOG(armgichist, "ipl %d vs ci_cpl %d pmr %#x", ipl,
+                   ci->ci_cpl, gicc_read(sc, GICC_PMR), 0);
                if (__predict_false(ipl < ci->ci_cpl)) {
                        pic_do_pending_ints(I32_bit, ipl, tf);
                        KASSERT(ci->ci_cpl == ipl);
@@ -310,14 +346,18 @@
         */
        KASSERT(old_ipl != IPL_HIGH);
        pic_do_pending_ints(I32_bit, old_ipl, tf);
-       KASSERTMSG(ci->ci_cpl == old_ipl, "ci_cpl %d old_ipl %d", ci->ci_cpl, old_ipl);
+       KASSERTMSG(ci->ci_cpl == old_ipl, "ci_cpl %d old_ipl %d", ci->ci_cpl,
+           old_ipl);
        KASSERT(old_mtx_count == ci->ci_mtx_count);
        KASSERT(old_l_biglocks == ci->ci_curlwp->l_biglocks);
+
+       KERNHIST_LOG(armgichist, "... done", 0, 0, 0, 0);
 }
 
 void
 armgic_establish_irq(struct pic_softc *pic, struct intrsource *is)
 {
+       KERNHIST_FUNC(__func__); KERNHIST_CALLED(armgichist);
        struct armgic_softc * const sc = PICTOSOFTC(pic);
        const size_t group = is->is_irq / 32;
        const u_int irq = is->is_irq & 31;
@@ -365,6 +405,9 @@
                }
                if (new_cfg != cfg) {
                        gicd_write(sc, cfg_reg, new_cfg);
+
+                       KERNHIST_LOG(armgichist, "irq %u: cfg changed from %#x "
+                           "to %#x", is->is_irq, cfg, new_cfg, 0);
                }
 #ifdef MULTIPROCESSOR
        } else {
@@ -462,6 +505,7 @@
 void
 armgic_ipi_send(struct pic_softc *pic, const kcpuset_t *kcp, u_long ipi)
 {
+       KERNHIST_FUNC(__func__); KERNHIST_CALLED(armgichist);
        struct armgic_softc * const sc = PICTOSOFTC(pic);
 
 #if 0
@@ -484,6 +528,7 @@
        }
 
        gicd_write(sc, GICD_SGIR, sgir);
+       KERNHIST_LOG(armgichist, "... done (%#x)", sgir, 0, 0, 0);
 }
 #endif
 
@@ -505,6 +550,13 @@
 {
        struct armgic_softc * const sc = &armgic_softc;
        struct mpcore_attach_args * const mpcaa = aux;
+#ifdef KERNHIST
+       static ONCE_DECL(armgic_once);
+
+       RUN_ONCE(&armgic_once, armgichist_init);
+#endif
+
+       KERNHIST_FUNC(__func__); KERNHIST_CALLED(armgichist);
 
        sc->sc_dev = self;
        self->dv_private = sc;