diff options
Diffstat (limited to 'arch/arm/plat-omap/include/mach/entry-macro.S')
| -rw-r--r-- | arch/arm/plat-omap/include/mach/entry-macro.S | 83 |
1 files changed, 78 insertions, 5 deletions
diff --git a/arch/arm/plat-omap/include/mach/entry-macro.S b/arch/arm/plat-omap/include/mach/entry-macro.S index 2276f89671d8..56426ed45ef4 100644 --- a/arch/arm/plat-omap/include/mach/entry-macro.S +++ b/arch/arm/plat-omap/include/mach/entry-macro.S @@ -3,6 +3,9 @@ * * Low-level IRQ helper macros for OMAP-based platforms * + * Copyright (C) 2009 Texas Instruments + * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com> + * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. @@ -10,6 +13,7 @@ #include <mach/hardware.h> #include <mach/io.h> #include <mach/irqs.h> +#include <asm/hardware/gic.h> #if defined(CONFIG_ARCH_OMAP1) @@ -56,15 +60,21 @@ .endm #endif -#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) +#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX) || \ + defined(CONFIG_ARCH_OMAP4) -#if defined(CONFIG_ARCH_OMAP24XX) #include <mach/omap24xx.h> -#endif -#if defined(CONFIG_ARCH_OMAP34XX) #include <mach/omap34xx.h> -#endif +/* REVISIT: This should be set dynamically if CONFIG_MULTI_OMAP2 is selected */ +#if defined(CONFIG_ARCH_OMAP2420) || defined(CONFIG_ARCH_OMAP2430) +#define OMAP2_VA_IC_BASE IO_ADDRESS(OMAP24XX_IC_BASE) +#elif defined(CONFIG_ARCH_OMAP34XX) +#define OMAP2_VA_IC_BASE IO_ADDRESS(OMAP34XX_IC_BASE) +#endif +#if defined(CONFIG_ARCH_OMAP4) +#include <mach/omap44xx.h> +#endif #define INTCPS_SIR_IRQ_OFFSET 0x0040 /* Active interrupt offset */ #define ACTIVEIRQ_MASK 0x7f /* Active interrupt bits */ @@ -77,6 +87,7 @@ .macro arch_ret_to_user, tmp1, tmp2 .endm +#ifndef CONFIG_ARCH_OMAP4 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp ldr \base, =OMAP2_VA_IC_BASE ldr \irqnr, [\base, #0x98] /* IRQ pending reg 1 */ @@ -92,6 +103,68 @@ and \irqnr, \irqnr, #ACTIVEIRQ_MASK /* Clear spurious bits */ .endm +#else + /* + * The interrupt numbering scheme is defined in the + * interrupt controller spec. To wit: + * + * Interrupts 0-15 are IPI + * 16-28 are reserved + * 29-31 are local. We allow 30 to be used for the watchdog. + * 32-1020 are global + * 1021-1022 are reserved + * 1023 is "spurious" (no interrupt) + * + * For now, we ignore all local interrupts so only return an + * interrupt if it's between 30 and 1020. The test_for_ipi + * routine below will pick up on IPIs. + * A simple read from the controller will tell us the number + * of the highest priority enabled interrupt. + * We then just need to check whether it is in the + * valid range for an IRQ (30-1020 inclusive). + */ + .macro get_irqnr_and_base, irqnr, irqstat, base, tmp + ldr \base, =OMAP44XX_VA_GIC_CPU_BASE + ldr \irqstat, [\base, #GIC_CPU_INTACK] + + ldr \tmp, =1021 + + bic \irqnr, \irqstat, #0x1c00 + + cmp \irqnr, #29 + cmpcc \irqnr, \irqnr + cmpne \irqnr, \tmp + cmpcs \irqnr, \irqnr + .endm + + /* We assume that irqstat (the raw value of the IRQ acknowledge + * register) is preserved from the macro above. + * If there is an IPI, we immediately signal end of interrupt + * on the controller, since this requires the original irqstat + * value which we won't easily be able to recreate later. + */ + + .macro test_for_ipi, irqnr, irqstat, base, tmp + bic \irqnr, \irqstat, #0x1c00 + cmp \irqnr, #16 + it cc + strcc \irqstat, [\base, #GIC_CPU_EOI] + it cs + cmpcs \irqnr, \irqnr + .endm + + /* As above, this assumes that irqstat and base are preserved */ + + .macro test_for_ltirq, irqnr, irqstat, base, tmp + bic \irqnr, \irqstat, #0x1c00 + mov \tmp, #0 + cmp \irqnr, #29 + itt eq + moveq \tmp, #1 + streq \irqstat, [\base, #GIC_CPU_EOI] + cmp \tmp, #0 + .endm +#endif .macro irq_prio_table .endm |