From dda94e5c66e4c48c3709acf5532c295a80845730 Mon Sep 17 00:00:00 2001 From: Wilfred Mallawa Date: Tue, 11 Jan 2022 17:10:25 +1000 Subject: hw: timer: ibex_timer: update/add reg address The following changes: 1. Fixes the incorrectly set CTRL register address. As per [1] https://docs.opentitan.org/hw/ip/rv_timer/doc/#register-table The CTRL register is @ 0x04. This was found when attempting to fixup a bug where a timer_interrupt was not serviced on TockOS-OpenTitan. 2. Adds ALERT_TEST register as documented on [1], adding repective switch cases to error handle and later implement functionality. Signed-off-by: Wilfred Mallawa Reviewed-by: Alistair Francis Tested-by: Alistair Francis Reviewed-by: Bin Meng Message-id: 20220111071025.4169189-2-alistair.francis@opensource.wdc.com Signed-off-by: Alistair Francis --- hw/timer/ibex_timer.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/hw/timer/ibex_timer.c b/hw/timer/ibex_timer.c index 826c38b..8c2ca36 100644 --- a/hw/timer/ibex_timer.c +++ b/hw/timer/ibex_timer.c @@ -34,7 +34,9 @@ #include "target/riscv/cpu.h" #include "migration/vmstate.h" -REG32(CTRL, 0x00) +REG32(ALERT_TEST, 0x00) + FIELD(ALERT_TEST, FATAL_FAULT, 0, 1) +REG32(CTRL, 0x04) FIELD(CTRL, ACTIVE, 0, 1) REG32(CFG0, 0x100) FIELD(CFG0, PRESCALE, 0, 12) @@ -142,6 +144,10 @@ static uint64_t ibex_timer_read(void *opaque, hwaddr addr, uint64_t retvalue = 0; switch (addr >> 2) { + case R_ALERT_TEST: + qemu_log_mask(LOG_GUEST_ERROR, + "Attempted to read ALERT_TEST, a write only register"); + break; case R_CTRL: retvalue = s->timer_ctrl; break; @@ -186,6 +192,9 @@ static void ibex_timer_write(void *opaque, hwaddr addr, uint32_t val = val64; switch (addr >> 2) { + case R_ALERT_TEST: + qemu_log_mask(LOG_UNIMP, "Alert triggering not supported"); + break; case R_CTRL: s->timer_ctrl = val; break; -- cgit v1.1