From 38ce73ebd74a9a1738b73619557f2397c59ba628 Mon Sep 17 00:00:00 2001 From: Lennert Buytenhek Date: Mon, 18 Sep 2006 23:21:38 +0100 Subject: [ARM] 3825/1: iop3xx: use cp6 enable/disable macros Add CP6 enable/disable sequences to the timekeeping code and the IRQ code. As a result, we can't depend on CP6 access being enabled when we enter get_irqnr_and_base anymore, so switch the latter over to using memory-mapped accesses for now. Signed-off-by: Lennert Buytenhek Signed-off-by: Russell King --- arch/arm/mach-iop33x/irq.c | 27 +++++++++------------------ 1 file changed, 9 insertions(+), 18 deletions(-) (limited to 'arch/arm/mach-iop33x') diff --git a/arch/arm/mach-iop33x/irq.c b/arch/arm/mach-iop33x/irq.c index bcffc33a5be..d667439c857 100644 --- a/arch/arm/mach-iop33x/irq.c +++ b/arch/arm/mach-iop33x/irq.c @@ -28,25 +28,33 @@ static u32 iop331_mask1 = 0; static inline void intctl_write0(u32 val) { // INTCTL0 + iop3xx_cp6_enable(); asm volatile("mcr p6,0,%0,c0,c0,0"::"r" (val)); + iop3xx_cp6_disable(); } static inline void intctl_write1(u32 val) { // INTCTL1 + iop3xx_cp6_enable(); asm volatile("mcr p6,0,%0,c1,c0,0"::"r" (val)); + iop3xx_cp6_disable(); } static inline void intstr_write0(u32 val) { // INTSTR0 + iop3xx_cp6_enable(); asm volatile("mcr p6,0,%0,c2,c0,0"::"r" (val)); + iop3xx_cp6_disable(); } static inline void intstr_write1(u32 val) { // INTSTR1 + iop3xx_cp6_enable(); asm volatile("mcr p6,0,%0,c3,c0,0"::"r" (val)); + iop3xx_cp6_disable(); } static void @@ -93,24 +101,7 @@ struct irq_chip iop331_irqchip2 = { void __init iop331_init_irq(void) { - unsigned int i, tmp; - - /* Enable access to coprocessor 6 for dealing with IRQs. - * From RMK: - * Basically, the Intel documentation here is poor. It appears that - * you need to set the bit to be able to access the coprocessor from - * SVC mode. Whether that allows access from user space or not is - * unclear. - */ - asm volatile ( - "mrc p15, 0, %0, c15, c1, 0\n\t" - "orr %0, %0, %1\n\t" - "mcr p15, 0, %0, c15, c1, 0\n\t" - /* The action is delayed, so we have to do this: */ - "mrc p15, 0, %0, c15, c1, 0\n\t" - "mov %0, %0\n\t" - "sub pc, pc, #4" - : "=r" (tmp) : "i" (1 << 6) ); + unsigned int i; intctl_write0(0); // disable all interrupts intctl_write1(0); -- cgit v1.2.3-70-g09d2