diff options
Diffstat (limited to 'arch/arm/mach-omap2/include/mach/entry-macro.S')
| -rw-r--r-- | arch/arm/mach-omap2/include/mach/entry-macro.S | 137 |
1 files changed, 47 insertions, 90 deletions
diff --git a/arch/arm/mach-omap2/include/mach/entry-macro.S b/arch/arm/mach-omap2/include/mach/entry-macro.S index 06e64e1fc28..befa321c4c1 100644 --- a/arch/arm/mach-omap2/include/mach/entry-macro.S +++ b/arch/arm/mach-omap2/include/mach/entry-macro.S @@ -38,41 +38,27 @@ */ #ifdef MULTI_OMAP2 + +/* + * We use __glue to avoid errors with multiple definitions of + * .globl omap_irq_base as it's included from entry-armv.S but not + * from entry-common.S. + */ +#ifdef __glue .pushsection .data -omap_irq_base: .word 0 + .globl omap_irq_base +omap_irq_base: + .word 0 .popsection +#endif - /* Configure the interrupt base on the first interrupt */ + /* + * Configure the interrupt base on the first interrupt. + * See also omap_irq_base_init for setting omap_irq_base. + */ .macro get_irqnr_preamble, base, tmp -9: ldr \base, =omap_irq_base @ irq base address ldr \base, [\base, #0] @ irq base value - cmp \base, #0 @ already configured? - bne 9997f @ nothing to do - - mrc p15, 0, \tmp, c0, c0, 0 @ get processor revision - and \tmp, \tmp, #0x000f0000 @ only check architecture - cmp \tmp, #0x00070000 @ is v6? - beq 2400f @ found v6 so it's omap24xx - mrc p15, 0, \tmp, c0, c0, 0 @ get processor revision - and \tmp, \tmp, #0x000000f0 @ check cortex 8 or 9 - cmp \tmp, #0x00000080 @ cortex A-8? - beq 3400f @ found A-8 so it's omap34xx - cmp \tmp, #0x00000090 @ cortex A-9? - beq 4400f @ found A-9 so it's omap44xx -2400: ldr \base, =OMAP2_IRQ_BASE - ldr \tmp, =omap_irq_base - str \base, [\tmp, #0] - b 9b -3400: ldr \base, =OMAP3_IRQ_BASE - ldr \tmp, =omap_irq_base - str \base, [\tmp, #0] - b 9b -4400: ldr \base, =OMAP4_IRQ_BASE - ldr \tmp, =omap_irq_base - str \base, [\tmp, #0] - b 9b -9997: .endm /* Check the pending interrupts. Note that base already set */ @@ -105,6 +91,35 @@ omap_irq_base: .word 0 9999: .endm +#ifdef CONFIG_SMP + /* 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 /* CONFIG_SMP */ #else /* MULTI_OMAP2 */ @@ -141,74 +156,16 @@ omap_irq_base: .word 0 #ifdef CONFIG_ARCH_OMAP4 +#define HAVE_GET_IRQNR_PREAMBLE +#include <asm/hardware/entry-macro-gic.S> .macro get_irqnr_preamble, base, tmp ldr \base, =OMAP4_IRQ_BASE .endm - /* - * 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 \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 #endif -#endif /* MULTI_OMAP2 */ - -#ifdef CONFIG_SMP - /* 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 /* CONFIG_SMP */ +#endif /* MULTI_OMAP2 */ .macro irq_prio_table .endm |