From 45bb5a7cbfa28dedc07730d6ecedbd574faf5459 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Sat, 13 Sep 2008 22:43:48 -0700 Subject: [PATCH] sparc32: Use PROM device probing for sun4c interrupt register. Signed-off-by: David S. Miller --- arch/sparc/kernel/sun4c_irq.c | 47 ++++++++++++++++------------------- 1 file changed, 21 insertions(+), 26 deletions(-) diff --git a/arch/sparc/kernel/sun4c_irq.c b/arch/sparc/kernel/sun4c_irq.c index ae3149ecaecd..8033132eda8c 100644 --- a/arch/sparc/kernel/sun4c_irq.c +++ b/arch/sparc/kernel/sun4c_irq.c @@ -59,7 +59,7 @@ * * so don't go making it static, like I tried. sigh. */ -unsigned char *interrupt_enable = NULL; +unsigned char __iomem *interrupt_enable = NULL; static void sun4c_disable_irq(unsigned int irq_nr) { @@ -68,7 +68,7 @@ static void sun4c_disable_irq(unsigned int irq_nr) local_irq_save(flags); irq_nr &= (NR_IRQS - 1); - current_mask = *interrupt_enable; + current_mask = sbus_readb(interrupt_enable); switch(irq_nr) { case 1: new_mask = ((current_mask) & (~(SUN4C_INT_E1))); @@ -86,7 +86,7 @@ static void sun4c_disable_irq(unsigned int irq_nr) local_irq_restore(flags); return; } - *interrupt_enable = new_mask; + sbus_writeb(new_mask, interrupt_enable); local_irq_restore(flags); } @@ -97,7 +97,7 @@ static void sun4c_enable_irq(unsigned int irq_nr) local_irq_save(flags); irq_nr &= (NR_IRQS - 1); - current_mask = *interrupt_enable; + current_mask = sbus_readb(interrupt_enable); switch(irq_nr) { case 1: new_mask = ((current_mask) | SUN4C_INT_E1); @@ -115,7 +115,7 @@ static void sun4c_enable_irq(unsigned int irq_nr) local_irq_restore(flags); return; } - *interrupt_enable = new_mask; + sbus_writeb(new_mask, interrupt_enable); local_irq_restore(flags); } @@ -172,27 +172,22 @@ static void sun4c_nop(void) {} void __init sun4c_init_IRQ(void) { - struct linux_prom_registers int_regs[2]; - int ie_node; - struct resource phyres; - - ie_node = prom_searchsiblings (prom_getchild(prom_root_node), - "interrupt-enable"); - if(ie_node == 0) - panic("Cannot find /interrupt-enable node"); - - /* Depending on the "address" property is bad news... */ - interrupt_enable = NULL; - if (prom_getproperty(ie_node, "reg", (char *) int_regs, - sizeof(int_regs)) != -1) { - memset(&phyres, 0, sizeof(struct resource)); - phyres.flags = int_regs[0].which_io; - phyres.start = int_regs[0].phys_addr; - interrupt_enable = (char *) of_ioremap(&phyres, 0, - int_regs[0].reg_size, "sun4c_intr"); + struct device_node *dp; + const u32 *addr; + + dp = of_find_node_by_name(NULL, "interrupt-enable"); + if (!dp) { + prom_printf("sun4c_init_IRQ: Unable to find interrupt-enable\n"); + prom_halt(); + } + + addr = of_get_property(dp, "address", NULL); + if (!addr) { + prom_printf("sun4c_init_IRQ: No address property\n"); + prom_halt(); } - if (!interrupt_enable) - panic("Cannot map interrupt_enable"); + + interrupt_enable = (void __iomem *) (unsigned long) addr[0]; BTFIXUPSET_CALL(enable_irq, sun4c_enable_irq, BTFIXUPCALL_NORM); BTFIXUPSET_CALL(disable_irq, sun4c_disable_irq, BTFIXUPCALL_NORM); @@ -206,6 +201,6 @@ void __init sun4c_init_IRQ(void) BTFIXUPSET_CALL(clear_cpu_int, sun4c_nop, BTFIXUPCALL_NOP); BTFIXUPSET_CALL(set_irq_udt, sun4c_nop, BTFIXUPCALL_NOP); #endif - *interrupt_enable = (SUN4C_INT_ENABLE); + sbus_writeb(SUN4C_INT_ENABLE, interrupt_enable); /* Cannot enable interrupts until OBP ticker is disabled. */ } -- 2.20.1