diff options
author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-11-08 16:27:21 +0000 |
---|---|---|
committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-11-08 16:27:21 +0000 |
commit | 48ca47d791830d3f34ab157e22a7823ae0373b54 (patch) | |
tree | aa3c6f72a9464cba98b2149a51e60094e24dfd08 | |
parent | 94ad22d83ced0c372de9dc5d38317293c66d629c (diff) | |
download | px4-nuttx-48ca47d791830d3f34ab157e22a7823ae0373b54.tar.gz px4-nuttx-48ca47d791830d3f34ab157e22a7823ae0373b54.tar.bz2 px4-nuttx-48ca47d791830d3f34ab157e22a7823ae0373b54.zip |
Add interrupt stack
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1168 42af7a65-404d-4744-a932-0658087f49c3
-rw-r--r-- | nuttx/arch/sh/src/common/up_doirq.c | 13 | ||||
-rw-r--r-- | nuttx/arch/sh/src/sh1/sh1_vector.S | 67 |
2 files changed, 73 insertions, 7 deletions
diff --git a/nuttx/arch/sh/src/common/up_doirq.c b/nuttx/arch/sh/src/common/up_doirq.c index 01aa21500..2c3943b06 100644 --- a/nuttx/arch/sh/src/common/up_doirq.c +++ b/nuttx/arch/sh/src/common/up_doirq.c @@ -83,13 +83,21 @@ void up_doirq(int irq, uint32* regs) /* Mask and acknowledge the interrupt (if supported by the chip) */ +#ifndef CONFIG_ARCH_NOINTC up_maskack_irq(irq); +#endif /* Deliver the IRQ */ irq_dispatch(irq, regs); - /* Indicate that we are no long in an interrupt handler */ + /* Get the current value of regs... it may have changed because + * of a context switch performed during interrupt processing. + */ + + regs = current_regs; + + /* Indicate that we are no longer in an interrupt handler */ current_regs = NULL; @@ -97,8 +105,11 @@ void up_doirq(int irq, uint32* regs) * disabled. */ +#ifndef CONFIG_ARCH_NOINTC up_enable_irq(irq); +#endif } up_ledoff(LED_INIRQ); #endif + return regs; } diff --git a/nuttx/arch/sh/src/sh1/sh1_vector.S b/nuttx/arch/sh/src/sh1/sh1_vector.S index 1df2838d0..a9efa214a 100644 --- a/nuttx/arch/sh/src/sh1/sh1_vector.S +++ b/nuttx/arch/sh/src/sh1/sh1_vector.S @@ -67,6 +67,29 @@ .section .reset /***************************************************************************** + * Name: _up_fullcontextrestore + * + * Description: + * restore context from a set of save registers + * + * R4 : Points to a the register save structure + * + *****************************************************************************/ + .section irq + .global _up_fullcontextrestore + .type _up_fullcontextrestore, #function + +_up_fullcontextrestore: + stc sr, r8 /* Mask all interrupts */ + mov.l .Lintmask, r9 + or r9, r8 + ldc r8, sr + + mov r5, r15 /* Replace stack pointer with the context save */ + bra _up_restoreregs + .size _up_fullcontextrestore, .-_up_fullcontextrestore + +/***************************************************************************** * Name: _up_vector * * Description: @@ -100,7 +123,7 @@ _up_vector: mov.l r9, @-r15 mov.l r8, @-r15 - stc sr, r8 /* Mask all interrupts */ + stc sr, r8 /* Mask all interrupts */ mov.l .Lintmask, r9 or r9, r8 ldc r8, sr @@ -111,15 +134,18 @@ _up_vector: mov.l r3, @-r15 mov.l r2, @-r15 mov.l r1, @-r15 - mov.l r0, @-r15 + mov.l r0, @r15 /* Setup parameters: R4=IRQ number, R5=base of saved state */ mov r15, r5 - add #-XCPTCONTEXT_SIZE, r5 /* Switch to the interrupt stack */ +#if CONFIG_ARCH_INTERRUPTSTACK > 3 + mov.l .Lintstack, r15 /* SP = interrupt stack base */ + mov.l r5, @sp /* Save the user stack pointer */ +#endif /* Dispatch the interrupt */ mov.l .Ldoirq, r0 @@ -131,11 +157,14 @@ _up_vector: * one that we passed in via r5. */ - add #XCPTCONTEXT_SIZE, r0 + add #-XCPTCONTEXT_SIZE, r0 mov r0, r15 - /* Restore registers */ + /* Restore registers. R15 may point to either the stack or a saved + * context structure inside of a TCB. + */ +_up_restoreregs: mov.l @r15+, r0 mov.l @r15+, r1 mov.l @r15+, r2 @@ -157,15 +186,41 @@ _up_vector: lds.l @r15+, macl mov.l @r15+, r4 - add #4, r15 + mov.l @r15, r15 /* The real stack pointer */ rte nop .align 2 .Lintmask: .long 0x000000f0 +#if CONFIG_ARCH_INTERRUPTSTACK > 3 +.Lintstack: + .long _up_stackbase +#endif .Ldoirq: .long _up_doirq .size _up_vector, .-_up_vector + +/************************************************************************************ + * Name: up_interruptstack/g_userstack + * + * Description: + * Shouldn't happen + * + ************************************************************************************/ + +#if CONFIG_ARCH_INTERRUPTSTACK > 3 + .bss + .align 4 + .globl _g_userstack + .type _g_userstack, object +_up_interruptstack: + .skip ((CONFIG_ARCH_INTERRUPTSTACK & ~3) - 4) +_g_userstack: +_up_stackbase: + .skip 4 + .size _g_userstack, 4 + .size _up_interruptstack, (CONFIG_ARCH_INTERRUPTSTACK & ~3) +#endif .end |