diff options
Diffstat (limited to 'nuttx/arch/mips/src/mips32/up_initialstate.c')
| -rw-r--r-- | nuttx/arch/mips/src/mips32/up_initialstate.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/nuttx/arch/mips/src/mips32/up_initialstate.c b/nuttx/arch/mips/src/mips32/up_initialstate.c index 89db4d7b9..2b200947e 100644 --- a/nuttx/arch/mips/src/mips32/up_initialstate.c +++ b/nuttx/arch/mips/src/mips32/up_initialstate.c @@ -54,6 +54,20 @@ * Pre-processor Definitions ****************************************************************************/ +#ifdef CONFIG_SUPPRESS_INTERRUPTS + + /* Enable only software interrupts */ + +# define INITIAL_STATUS (CP0_STATUS_IE | CP0_STATUS_EXL | CP0_STATUS_IM_SWINTS) + +#else + + /* Enable all interrupts */ + +# define INITIAL_STATUS (CP0_STATUS_IE | CP0_STATUS_EXL | CP0_STATUS_IM_ALL) + +#endif + /**************************************************************************** * Private Data ****************************************************************************/ @@ -83,13 +97,16 @@ void up_initial_state(_TCB *tcb) { struct xcptcontext *xcp = &tcb->xcp; - irqstate_t status; /* Initialize the initial exception register context structure */ memset(xcp, 0, sizeof(struct xcptcontext)); - /* Save the initial stack pointer */ + /* Save the initial stack pointer. Hmmm.. the stack is set to the very + * beginning of the stack region. Some functions may want to store data on + * the caller's stack and it might be good to reserve some space. However, + * only the start function would do that and we have control over that one + */ xcp->regs[REG_SP] = (uint32_t)tcb->adj_stack_ptr; @@ -118,13 +135,6 @@ void up_initial_state(_TCB *tcb) /* Enable or disable interrupts, based on user configuration */ - status = cp0_getstatus(); -# ifdef CONFIG_SUPPRESS_INTERRUPTS - status &= ~CP0_STATUS_IM_MASK; /* Disable all interrupts */ - status |= CP0_STATUS_IM_SWINTS; /* Make sure that S/W interrupts enabled */ -#else - status |= CP0_STATUS_IM_ALL; /* Enable all interrupts */ -# endif - xcp->regs[REG_STATUS] = status; + xcp->regs[REG_STATUS] = INITIAL_STATUS; } |