From 94c5f455d3dc2222e0f793928eccf45ab968460e Mon Sep 17 00:00:00 2001 From: Artyom Tarasenko Date: Mon, 21 Jun 2010 20:23:21 +0200 Subject: [PATCH] mask all interrupts when MASTER_DISABLE is set MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The MASTER_DISABLE bit (aka mask-all) masks all the interrupts. According to Sun-4M System Architecture "The level–15 interrupt sources [...] are maskable with the Interrupt Target Mask Register. While these interrupts are considered ’non–maskable’ within the SPARC IU, a mask capability is provided to allow the boot firmware to establish a basic environment before receiving any level–15 interrupts, which are non–maskable within SPARC. A mask–all bit is provided to allow disabling of all external interrupts during change of the CIT." Signed-off-by: Artyom Tarasenko Signed-off-by: Blue Swirl --- hw/slavio_intctl.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/hw/slavio_intctl.c b/hw/slavio_intctl.c index b76d3acadd..10362a3655 100644 --- a/hw/slavio_intctl.c +++ b/hw/slavio_intctl.c @@ -289,9 +289,12 @@ static void slavio_check_interrupts(SLAVIO_INTCTLState *s, int set_irqs) } } - /* Level 15 and CPU timer interrupts are not maskable */ - pil_pending |= s->slaves[i].intreg_pending & - (CPU_IRQ_INT15_IN | CPU_IRQ_TIMER_IN); + /* Level 15 and CPU timer interrupts are only masked when + the MASTER_DISABLE bit is set */ + if (!(s->intregm_disabled & MASTER_DISABLE)) { + pil_pending |= s->slaves[i].intreg_pending & + (CPU_IRQ_INT15_IN | CPU_IRQ_TIMER_IN); + } /* Add soft interrupts */ pil_pending |= (s->slaves[i].intreg_pending & CPU_SOFTIRQ_MASK) >> 16;