diff options
Diffstat (limited to 'nuttx/arch/arm/include/irq.h')
-rw-r--r-- | nuttx/arch/arm/include/irq.h | 194 |
1 files changed, 6 insertions, 188 deletions
diff --git a/nuttx/arch/arm/include/irq.h b/nuttx/arch/arm/include/irq.h index b2cd3d9c0..1d2c3e122 100644 --- a/nuttx/arch/arm/include/irq.h +++ b/nuttx/arch/arm/include/irq.h @@ -47,206 +47,24 @@ #include <nuttx/irq.h> #include <arch/chip/irq.h> +#ifdef __thumb2__ +# include <arch/irq_thumb2.h> +#else +# include <arch/irq_arm.h> +#endif + /**************************************************************************** * Definitions ****************************************************************************/ -/* IRQ Stack Frame Format: - * - * Context is always saved/restored in the same way: - * - * (1) stmia rx, {r0-r14} - * (2) then the PC and CPSR - * - * This results in the following set of indices that - * can be used to access individual registers in the - * xcp.regs array: - */ - -#define REG_R0 (0) -#define REG_R1 (1) -#define REG_R2 (2) -#define REG_R3 (3) -#define REG_R4 (4) -#define REG_R5 (5) -#define REG_R6 (6) -#define REG_R7 (7) -#define REG_R8 (8) -#define REG_R9 (9) -#define REG_R10 (10) -#define REG_R11 (11) -#define REG_R12 (12) -#define REG_R13 (13) -#define REG_R14 (14) -#define REG_R15 (15) -#define REG_CPSR (16) - -#define XCPTCONTEXT_REGS (17) -#define XCPTCONTEXT_SIZE (4 * XCPTCONTEXT_REGS) - -#define REG_A1 REG_R0 -#define REG_A2 REG_R1 -#define REG_A3 REG_R2 -#define REG_A4 REG_R3 -#define REG_V1 REG_R4 -#define REG_V2 REG_R5 -#define REG_V3 REG_R6 -#define REG_V4 REG_R7 -#define REG_V5 REG_R8 -#define REG_V6 REG_R9 -#define REG_V7 REG_R10 -#define REG_SB REG_R9 -#define REG_SL REG_R10 -#define REG_FP REG_R11 -#define REG_IP REG_R12 -#define REG_SP REG_R13 -#define REG_LR REG_R14 -#define REG_PC REG_R15 - /**************************************************************************** * Public Types ****************************************************************************/ -/* This struct defines the way the registers are stored. We - * need to save: - * - * 1 CPSR - * 7 Static registers, v1-v7 (aka r4-r10) - * 1 Frame pointer, fp (aka r11) - * 1 Stack pointer, sp (aka r13) - * 1 Return address, lr (aka r14) - * --- - * 11 (XCPTCONTEXT_USER_REG) - * - * On interrupts, we also need to save: - * 4 Volatile registers, a1-a4 (aka r0-r3) - * 1 Scratch Register, ip (aka r12) - *--- - * 5 (XCPTCONTEXT_IRQ_REGS) - * - * For a total of 17 (XCPTCONTEXT_REGS) - */ - -#ifndef __ASSEMBLY__ -struct xcptcontext -{ - /* The following function pointer is non-zero if there - * are pending signals to be processed. - */ - -#ifndef CONFIG_DISABLE_SIGNALS - void *sigdeliver; /* Actual type is sig_deliver_t */ - - /* These are saved copies of LR and CPSR used during - * signal processing. - */ - - uint32 saved_pc; - uint32 saved_cpsr; -#endif - - /* Register save area */ - - uint32 regs[XCPTCONTEXT_REGS]; -}; -#endif - /**************************************************************************** * Inline functions ****************************************************************************/ -#ifndef __ASSEMBLY__ - -#ifdef __thumb2__ - -/* Save the current interrupt enable state & disable IRQs */ - -static inline irqstate_t irqsave(void) -{ - unsigned short primask; - - /* Return the the current value of primask register and set - * bit 0 of the primask register to disable interrupts - */ - - __asm__ __volatile__ - ( - "\tmrs %0, primask\n" - "\tcpsid i\n" - : "=r" (primask) - : - : "memory"); - return primask; -} - -/* Restore saved IRQ & FIQ state */ - -static inline void irqrestore(irqstate_t primask) -{ - /* If bit 0 of the primask is 0, then we need to restore - * interupts. - */ - - __asm__ __volatile__ - ( - "\ttst %0, #1\n" - "\tbne 1f\n" - "\tcpsie i\n" - "1:\n" - : - : "r" (primask) - : "memory"); -} - -#else /* __thumb2__ */ - -/* Save the current interrupt enable state & disable IRQs */ - -static inline irqstate_t irqsave(void) -{ - unsigned int flags; - unsigned int temp; - __asm__ __volatile__ - ( - "\tmrs %0, cpsr\n" - "\torr %1, %0, #128\n" - "\tmsr cpsr_c, %1" - : "=r" (flags), "=r" (temp) - : - : "memory"); - return flags; -} - -/* Restore saved IRQ & FIQ state */ - -static inline void irqrestore(irqstate_t flags) -{ - __asm__ __volatile__ - ( - "msr cpsr_c, %0" - : - : "r" (flags) - : "memory"); -} - -static inline void system_call(swint_t func, int parm1, - int parm2, int parm3) -{ - __asm__ __volatile__ - ( - "mov\tr0,%0\n\t" - "mov\tr1,%1\n\t" - "mov\tr2,%2\n\t" - "mov\tr3,%3\n\t" - "swi\t0x900001\n\t" - : - : "r" ((long)(func)), "r" ((long)(parm1)), - "r" ((long)(parm2)), "r" ((long)(parm3)) - : "r0", "r1", "r2", "r3", "lr"); -} -#endif /* __thumb2__ */ -#endif /* __ASSEMBLY__ */ - /**************************************************************************** * Public Variables ****************************************************************************/ |